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You searched for: Publication year rev 7984-2016 Remove constraint Publication year rev: 7984-2016 Subject term alkali treatment Remove constraint Subject term: alkali treatment Subject term biomass Remove constraint Subject term: biomass Text availability Citation in PubAg Remove constraint Text availability: Citation in PubAg
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1. A biorefinery concept using the green macroalgae Chaetomorpha linum for the coproduction of bioethanol and biogas

Author:
Nesrine Ben Yahmed; Mohamed Amine Jmel; Monia Ben Alaya; Hassib Bouallagui; M. Nejib Marzouki; Issam Smaali
Source:
Energy conversion and management 2016 v.119 pp. 257-265
ISSN:
0196-8904
Subject:
anaerobic digesters; macroalgae; sodium hydroxide; biogas; Chaetomorpha; scanning electron microscopy; feedstocks; reducing sugars; biorefining; alkali treatment; mycelium; saccharification; effluents; thallus; hydrolysis; Aspergillus awamori; biomass; ethanol; alcoholic fermentation; bioethanol; Saccharomyces cerevisiae; enzymatic hydrolysis; pH; coproducts; fungi
Abstract:
... An innovative integrated biorefinery approach using the green macroalgae Chaetomorpha linum was investigated in the present study for the co-production of bioethanol and biogas. Among three pretreatments of C. linum biomass, consisting of acidic, neutral and alkali ones, 3% NaOH pretreatment gave the best result in terms of thallus disintegration, biomass recovery and enzymatic digestibility as de ...
DOI:
10.1016/j.enconman.2016.04.046

2. A review on alkaline pretreatment technology for bioconversion of lignocellulosic biomass

Author:
Jun Seok Kim; Y.Y. Lee; Tae Hyun Kim
Source:
Bioresource technology 2016 v.199 pp. 42-48
ISSN:
0960-8524
Subject:
alkali treatment; biomass; biotransformation; enzymatic hydrolysis; lignin; lignocellulose; porosity; saccharification; surface area
Abstract:
... The native form of lignocellulosic biomass is resistant to enzymatic breakdown. A well-designed pretreatment that can promote enzymatic hydrolysis of biomass with reasonable processing cost is therefore necessary. To this end, a number of different types of pretreatment technologies have been developed with a common goal of making biomass more susceptible to enzymatic saccharification. Among those ...
DOI:
10.1016/j.biortech.2015.08.085

3. Alkali treatment of fungal pretreated wheat straw for bioethanol production

Author:
María García-Torreiro; Miguel Álvarez Pallín; María López-Abelairas; Thelmo A. Lu-Chau; Juan M. Lema
Source:
Bioethanol 2016 v.2 no.1 pp. -
ISSN:
2299-6788
Subject:
Irpex lacteus; alkali treatment; bioethanol; biomass; biotransformation; enzymatic hydrolysis; ethanol; ethanol production; lignocellulose; operating costs; recycling; sodium hydroxide; sugars; wheat straw; white-rot fungi
Abstract:
... Bioconversion of lignocellulosic materials into ethanol requires an intermediate pretreatment step for conditioning biomass. Sugar yields from wheat straw were previously improved by the addition of a mild alkali pretreatment step before bioconversion by the white-rot fungus Irpex lacteus. In this work, an alternative alkaline treatment, which significantly reduces water consumption, was implement ...
DOI:
10.1515/bioeth-2015-0004

4. Alkaline pretreatment for practicable production of ethanol and xylooligosaccharides

Author:
Viviane Marcos Nascimento; Anny Manrich; Paulo Waldir Tardioli; Roberto de Campos Giordano; George Jackson de Moraes Rocha; Raquel de Lima Camargo Giordano
Source:
Bioethanol 2016 v.2 no.1 pp. -
ISSN:
2299-6788
Subject:
additives; alkali treatment; biocatalysts; bioethanol; biomass; biorefining; drugs; economics; electric power; endo-1,4-beta-xylanase; energy; ethanol; feeds; raw materials; sodium hydroxide; sugarcane bagasse; xylan; xylooligosaccharides; xylose
Abstract:
... The economics for production of secondgeneration (2G) ethanol from sugarcane bagasse in large scale, competing with the cogeneration of electric energy, is still not consolidated. In this scenario, the key for feasibility may be the biorefinery concept, a multiproduct industry using biomass fractions to produce energy, chemicals and by-products. Xylooligosaccharides (XOS) are oligomers of xylose o ...
DOI:
10.1515/bioeth-2016-0008

5. Appropriate biorefining strategies for multiple feedstocks: Critical evaluation for pretreatment methods, and hydrolysis with high solids loading

Author:
Yadhu N. Guragain; Donghai Wang; Praveen V. Vadlani
Source:
Renewable energy 2016 v.96 pp. 832-842
ISSN:
0960-1481
Subject:
alkali treatment; biofuels; biomass; biorefining; culture media; feedstocks; fermentation; glucose; grasses; hardwood; hydrolysates; hydrolysis; softwood; streams; xylose
Abstract:
... Efficient utilization of a wide range of feedstocks requires appropriate biorefining strategies based on pretreatment methods. This study showed that alkali pretreatment was significantly more effective than acid pretreatment at similar processing conditions for grass and hardwood biomass samples; but, both methods were ineffective for softwood biomass. Separate glucose and xylose streams can be o ...
DOI:
10.1016/j.renene.2016.04.099

6. BIOSORPTION OF CD, CR, MN, AND PB FROM AQUEOUS SOLUTIONS BY Bacillus SP STRAINS ISOLATED FROM INDUSTRIAL WASTE ACTIVATE SLUDGE

Author:
Rocío García; Juan Campos; Julio Alfonso Cruz; Ma. Elena Calderón; Ma. Elena Raynal; Germán Buitrón
Source:
TIP 2016 v.19 no.1 pp. 5-14
ISSN:
1405-888X
Subject:
Bacillus (bacteria); acid treatment; activated sludge; adsorption; alkali treatment; aqueous solutions; bacteria; biomass; biosorbents; biosorption; cadmium; chromium; heavy metals; industrial wastes; industrial wastewater; ion exchange; lead; manganese; metal ions; metal tolerance; toxicity; waste treatment
Abstract:
... The microorganisms are capable of accumulating heavy metal ions from water as biosorbent agents, offering a potential alternative for the detoxification and recovery of toxic/precious metals in industrial wastewater. In the present work, metal-resistant bacterial strains were isolated and identified from activated sludge of a waste treatment plant in the Municipality of Santa Rosa Jauregui, Querét ...
DOI:
10.1016/j.recqb.2016.02.001

7. Bioethanol production from pretreated Miscanthus floridulus biomass by simultaneous saccharification and fermentation

Author:
Ren-Hua Yeh; Yu-Sheng Lin; Tzu-Hsien Wang; Wei-Chih Kuan; Wen-Chien Lee
Source:
Biomass and bioenergy 2016 v.94 pp. 110-116
ISSN:
0961-9534
Subject:
C4 plants; Miscanthus floridulus; Saccharomyces cerevisiae; alkali treatment; ambient temperature; biomass; cellulases; delignification; enzymatic hydrolysis; ethanol; ethanol production; fermentation; glucans; grasses; hemicellulose; lignin; raw materials; saccharification; stems; yeasts
Abstract:
... The production of ethanol from the fast-growing perennial C4 grass Miscanthus floridulus by simultaneous saccharification and fermentation (SSF) was investigated. M. floridulus biomass was composed of 36.3% glucan, 22.8% hemicellulose, and 21.3% lignin (based on dried mass). Prior to SSF, harvested stems of M. floridulus were pretreated separately by alkali treatment at room temperature, alkali tr ...
DOI:
10.1016/j.biombioe.2016.08.009

8. Biorefinery approach towards greener succinic acid production from oil palm frond bagasse

Author:
Abdullah Amru Indera Luthfi; Jamaliah Md. Jahim; Shuhaida Harun; Jian Ping Tan; Abdul Wahab Mohammad
Source:
Process biochemistry 2016 v.51 no.10 pp. 1527-1537
ISSN:
1359-5113
Subject:
Actinobacillus succinogenes; Elaeis guineensis; alkali treatment; bagasse; batch fermentation; biomass; biorefining; carbon; enzymatic hydrolysis; fats and oils industry; formates; glucose; hydrolysates; raw materials; succinic acid; xylose
Abstract:
... Oil palm frond (OPF) bagasse, being one of the cheapest biomass ever reported ($19.4/t), was hydrolyzed and used as a raw material for fermentative production of succinic acid for the first time. Results indicated that glucose and xylose were released as the main carbon source after alkaline pretreatment followed by enzymatic hydrolysis. The resultant hydrolysate from the pretreated OPF bagasse wa ...
DOI:
10.1016/j.procbio.2016.08.011

9. Biosorption and retention of orthophosphate onto Ca(OH)2-pretreated biomass of Phragmites sp.

Author:
Giorgos Markou; Dimitris Mitrogiannis; Koenraad Muylaert; Abuzer Çelekli; Hüseyin Bozkurt
Source:
Journal of environmental sciences (China) 2016 v.45 pp. 49-59
ISSN:
1001-0742
Subject:
Phragmites; agricultural industry; alkali treatment; biomass; biosorption; calcium; calcium hydroxide; electrostatic interactions; environmental impact; fertilizers; kinetics; leaves; ligands; orthophosphates; phosphorus; soil conditioners; sorption isotherms; thermodynamics; wastewater
Abstract:
... The biosorption of phosphorus in the form of orthophosphate (Po) from wastewater using biomass as the sorbent is of potential importance because the Po-loaded biomass could be applied in the agricultural sector as fertilizer and soil conditioner. However, biomass generally displays a very low affinity for Po sorption and therefore biomass surface modification is required. In the present study, the ...
DOI:
10.1016/j.jes.2015.12.009

10. Characterization of anatomy, lignin distribution, and response to pretreatments of sugarcane culm node and internode

Author:
Michel Brienzo; Yuri Abud; Solange Ferreira; Roberta C.N.R Corrales; Viridiana S. Ferreira-Leitão; Wanderley de Souza; Celso Sant’Anna
Source:
Industrial crops and products 2016 v.84 pp. 305-313
ISSN:
0926-6690
Subject:
alkali treatment; biomass; chemical composition; crystal structure; culms; digestibility; enzymatic hydrolysis; ethanol; hemicellulose; industry; lignin; scanning electron microscopy; sugarcane; sugarcane bagasse; sugars; vascular bundles
Abstract:
... Sugarcane culm has different types of tissue organization, and its heterogeneity can influence the bagasse quality generated in the sugar/ethanol industry. The heterogeneity of the sugarcane bagasse contributes to the intrinsic recalcitrance of the biomass, impairing its conversion to ethanol. To determine the effects of sugarcane culm heterogeneity, the internode and node fractions were pretreate ...
DOI:
10.1016/j.indcrop.2016.01.039

11. Characterization of cellulose nanofiber sheets from different refining processes

Author:
Kohji Nobuta; Hiroshi Teramura; Hiroaki Ito; Chizuru Hongo; Hideo Kawaguchi; Chiaki Ogino; Akihiko Kondo; Takashi Nishino
Source:
Cellulose 2016 v.23 no.1 pp. 403-414
ISSN:
0969-0239
Subject:
X-ray diffraction; alkali treatment; biomass; cellulose; delignification; filtration; grinding; hemicellulose; kenaf; nanofibers; refining; roots; tensile strength
Abstract:
... Four types of kenaf bast fibers were prepared via a combination of Wise treatments, for delignification, and alkaline treatments, for the removal of hemicellulose. Each type of kenaf bast fiber with different refining processes were nano fibrillated by grinding. Resulting, cellulose nanofiber (CNF) sheet was obtained from CNF by vacuum filtration (Scheme 1). The structures and properties of these ...
DOI:
10.1007/s10570-015-0792-y

12. Cogon grass (Imperata cylindrica), a potential biomass candidate for bioethanol: cell wall structural changes enhancing hydrolysis in a mild alkali pretreatment regime

Author:
Md Azizul Haque; Dhirendra Nath Barman; Min Keun Kim; Han Dae Yun; Kye Man Cho
Source:
Journal of the science of food and agriculture 2016 v.96 no.5 pp. 1790-1797
ISSN:
0022-5142
Subject:
Fourier transform infrared spectroscopy; Imperata cylindrica; alkali treatment; atomic force microscopy; bioethanol; biomass; cell walls; cellulose; granules; grasses; hemicellulose; hydrolysis; lignin; reducing sugars; scanning electron microscopy; sodium hydroxide; waxes
Abstract:
... BACKGROUND: Imperata cylindrica is being considered as a biomass candidate for bioethanol. This work aimed to evaluate a mild alkali pretreatment effect on the Imperata recalcitrant structure. Therefore, varied concentrations of NaOH (0, 7.5, 15, 20, and 25 g L⁻¹) were applied as treatments to Imperata at 105 °C for 10 min. RESULTS: Scanning electron microscopy, atomic force microscopy, and Fourie ...
DOI:
10.1002/jsfa.7288

13. Combining Ultrasound with Mild Alkaline Solutions as an Effective Pretreatment to Boost the Release of Sugar Trapped in Sugarcane Bagasse for Bioethanol Production

Author:
Marzieh Eblaghi; Mehrdad Niakousari; Mohammad Sarshar; Gholam Reza Mesbahi
Source:
Journal of food process engineering 2016 v.39 no.3 pp. 273-282
ISSN:
0145-8876
Subject:
X-ray diffraction; alkali treatment; bioenergy industry; biomass; cellulose; corn; crystal structure; digestibility; ethanol fermentation; ethanol production; feedstocks; food crops; glucose; hydrolysis; lignocellulose; microstructure; plant residues; scanning electron microscopy; sodium hydroxide; sugarcane; sugarcane bagasse; temperature
Abstract:
... The aim of this work was to develop and optimize process parameters in ultrasound and sono‐assisted alkaline pretreatment of sugarcane bagasse prior to hydrolysis and bioethanol fermentation processes. Following the optimization of ultrasound time and temperature, the influence of concentration of NaOH solution was examined. The optimal condition in ultrasound pretreatment (35 kHz) was achieved at ...
DOI:
10.1111/jfpe.12220

14. Comparison between solid-state and powder-state alkali pretreatment on saccharification and fermentation for bioethanol production from rice straw

Author:
Shabina Yeasmin; Chul-Hwan Kim; Shah Md. Asraful Islam; Ji-Young Lee
Source:
Preparative biochemistry & biotechnology 2016 v.46 no.3 pp. 229-237
ISSN:
1532-2297
Subject:
Fourier transform infrared spectroscopy; absorbance; alkali treatment; atomic force microscopy; biomass; ethanol; ethanol fermentation; ethanol production; glucose; hydrolysis; lignin; rice straw; saccharification; scanning electron microscopy; sodium hydroxide
Abstract:
... The efficacy of different concentrations of NaOH (0.25%, 0.50%, 0.75%, and 1.00%) for the pretreatment of rice straw in solid and powder state in enzymatic saccharification and fermentation for the production of bioethanol was evaluated. A greater amount of biomass was recovered through solid-state pretreatment (3.74 g) from 5 g of rice straw. The highest increase in the volume of rice straw powde ...
DOI:
10.1080/10826068.2015.1015563

15. Comparison of dilute acid and alkali pretreatments in production of fermentable sugars from bamboo: Effect of Tween 80

Author:
Kena Li; Jinming Wan; Xiao Wang; Jingfeng Wang; Junhua Zhang
Source:
Industrial crops and products 2016 v.83 pp. 414-422
ISSN:
0926-6690
Subject:
alkali treatment; ammonia; bamboos; biomass; crop yield; delignification; endo-1,4-beta-glucanase; enzymatic hydrolysis; ethanol production; grasses; hydrolysis; lignin; polysorbates; reducing sugars; saccharification; sodium hydroxide; sugar content; surfactants; xylan; xylanases
Abstract:
... As a fast growing woody grass with high sugar contents, bamboo is a potential material for the production of bio-ethanol, and the saccharification of bamboo has been extensively investigated. However, the role of surfactants on the pretreatment and enzymatic hydrolysis of bamboo has not been clearly elucidated. In this work, effects of aqueous ammonia (SAA), dilute acid (DA), and NaOH pretreatment ...
DOI:
10.1016/j.indcrop.2016.01.003

16. Development of a novel sequential pretreatment strategy for the production of bioethanol from sugarcane trash

Author:
Subbiah Raghavi; Raveendran Sindhu; Parameswaran Binod; Edgard Gnansounou; Ashok Pandey
Source:
Bioresource technology 2016 v.199 pp. 202-210
ISSN:
0960-8524
Subject:
Fourier transform infrared spectroscopy; Saccharomyces cerevisiae; X-ray diffraction; alkali treatment; biodiesel; bioethanol; biomass; ethanol production; experimental design; fermentation; glycerol; hemicellulose; hexoses; hydrolysates; hydrolysis; industry; lignin; organic acids and salts; pentoses; reducing sugars; saccharification; scanning electron microscopy; sugarcane trash
Abstract:
... A novel sequential pretreatment strategy using biodiesel industry generated waste glycerol assisted transition metal and alkali pretreatment of sugarcane trash were developed for the production of bioethanol. Various process parameters affecting pretreatment as well as hydrolysis were optimized by adopting a Taguchi design. This novel method was found to be superior when compared to conventional p ...
DOI:
10.1016/j.biortech.2015.08.062

17. Dilute alkaline pretreatment for reducing sugar production from Tetraselmis suecica and Chlorella sp. biomass

Author:
Mohd Asyraf Kassim; Sankar Bhattacharya
Source:
Process biochemistry 2016 v.51 no.11 pp. 1757-1766
ISSN:
1359-5113
Subject:
Chlorella; Fourier transform infrared spectroscopy; Tetraselmis suecica; alkali treatment; biomass; microalgae; potassium hydroxide; reducing sugars; saccharification; scanning electron microscopy; sodium hydroxide; temperature
Abstract:
... Dilute alkaline pretreatment of two different types of microalgal biomass (Tetraselmis suecica and Chlorella sp.) was investigated and the pretreated biomass was subjected for enzymatic saccharification. The effect of pretreatment parameters such as alkaline concentration, temperature and reaction time on reducing sugar production from both microalgal biomass has been investigated. The maximum red ...
DOI:
10.1016/j.procbio.2015.11.027

18. Effect of dilute alkaline pretreatment on the conversion of different parts of corn stalk to fermentable sugars and its application in acetone–butanol–ethanol fermentation

Author:
Di Cai; Ping Li; Zhangfeng Luo; Peiyong Qin; Changjing Chen; Yong Wang; Zheng Wang; Tianwei Tan
Source:
Bioresource technology 2016 v.211 pp. 117-124
ISSN:
0960-8524
Subject:
alkali treatment; biomass; butanol; corn stover; culture media; enzymatic hydrolysis; feedstocks; fermentation; flowers; hydrolysates; leaves; sodium hydroxide; solvents; sugars; temperature
Abstract:
... To investigate the effect of dilute alkaline pretreatment on different parts of biomass, corn stalk was separated into flower, leaf, cob, husk and stem, which were treated by NaOH in range of temperature and chemical loading. The NaOH-pretreated solid was then enzymatic hydrolysis and used as the substrate for batch acetone–butanol–ethanol (ABE) fermentation. The results demonstrated the five part ...
DOI:
10.1016/j.biortech.2016.03.076

19. Efficient sugar production from sugarcane bagasse by microwave assisted acid and alkali pretreatment

Author:
Zongyuan Zhu; Camila Alves Rezende; Rachael Simister; Simon J. McQueen-Mason; Duncan J. Macquarrie; Igor Polikarpov; Leonardo D. Gomez
Source:
Biomass and bioenergy 2016 v.93 pp. 269-278
ISSN:
0961-9534
Subject:
alkali treatment; bioethanol; biomass; carbonization; delignification; energy; enzymatic hydrolysis; feedstocks; glucose; heat; hemicellulose; lignin; microwave treatment; reducing sugars; scanning electron microscopy; sodium hydroxide; sugarcane bagasse; sulfuric acid; xylose
Abstract:
... Sugarcane bagasse represents one of the best potential feedstocks for the production of second generation bioethanol. The most efficient method to produce fermentable sugars is by enzymatic hydrolysis, assisted by thermochemical pretreatments. Previous research was focused on conventional heating pretreatment and the pretreated biomass residue characteristics. In this work, microwave energy is app ...
DOI:
10.1016/j.biombioe.2016.06.017

20. Enhancing bio-butanol production from biomass of Chlorella vulgaris JSC-6 with sequential alkali pretreatment and acid hydrolysis

Author:
Yue Wang; Wanqian Guo; Chieh-Lun Cheng; Shih-Hsin Ho; Jo-Shu Chang; Nanqi Ren
Source:
Bioresource technology 2016 v.200 pp. 557-564
ISSN:
0960-8524
Subject:
Chlorella vulgaris; acid hydrolysis; alkali treatment; biohydrogen; biomass; butanol; feedstocks; fermentation; glucose; hydrolysates; microalgae; nitrogen; sodium hydroxide; sulfuric acid
Abstract:
... This study presents a successful butanol production method using alkali and acid pretreated biomass of Chlorella vulgaris JSC-6. The butanol concentration, yield, and productivity were 13.1g/L, 0.58mol/mol sugar, 0.66g/L/h, respectively. Nearly 2.93L/L of biohydrogen was produced during the acidogenesis phase in ABE fermentation. The hydrogen yield and productivity were 0.39mol/mol sugar and 104.2 ...
DOI:
10.1016/j.biortech.2015.10.056

21. Enzymatic saccharification of high pressure assist-alkali pretreated cotton stalk and structural characterization

Author:
Shuang-kui Du; Xia Su; Weihua Yang; Yanqin Wang; Meng Kuang; Lei Ma; Dan Fang; Dayun Zhou
Source:
Carbohydrate polymers 2016 v.140 pp. 279-286
ISSN:
0144-8617
Subject:
Fourier transform infrared spectroscopy; Gossypium hirsutum; X-ray diffraction; agitation; alkali treatment; biomass; biotransformation; cellulose; cotton; enzymatic treatment; ethanol production; feedstocks; high pressure treatment; hydrolysis; lignocellulose; pH; reducing sugars; saccharification; scanning electron microscopy; stems; temperature
Abstract:
... Cotton stalk is a potential biomass for bioethanol production, while the conversion of direct saccharification or biotransformation of cotton stalk is extremely low due to the recalcitrant nature of lignocellulose. To enhance the enzymatic conversion of cotton stalks, the enzymatic saccharification parameters of high pressure assist-alkali pretreatment (HPAP) cotton stalk were optimized in the pre ...
DOI:
10.1016/j.carbpol.2015.12.056

22. Ethanol and hydrogen production from sunflower straw: The effect of pretreatment on the whole slurry fermentation

Author:
Georgia Antonopoulou; Dimitrios Vayenas; Gerasimos Lyberatos
Source:
Biochemical engineering journal 2016 v.116 pp. 65-74
ISSN:
1369-703X
Subject:
Helianthus annuus; Scheffersomyces stipitis; alkali treatment; biological production; biomass; ethanol; fermentation; hydrochloric acid; hydrogen production; saccharification; sludge; slurries; straw; sulfuric acid; xylose; yeasts
Abstract:
... In the present study the whole slurry obtained after different pretreatment methods applied on sunflower straw (SS) biomass, was used for biological production of hydrogen (BHP) and ethanol (BEP). BHP from pretreated SS was studied in batch experiments using mixed anaerobic sludge, via simultaneous saccharification and fermentation (SSF), while for BEP, SSF was carried out using the xylose – ferme ...
DOI:
10.1016/j.bej.2016.06.014

23. Ethanol production from acid- and alkali-pretreated corncob by endoglucanase and β-glucosidase co-expressing Saccharomyces cerevisiae subject to the expression of heterologous genes and nutrition added

Author:
Chunying Feng; Shaolan Zou; Cheng Liu; Huajun Yang; Kun Zhang; Yuanyuan Ma; Jiefang Hong; Minhua Zhang
Source:
World journal of microbiology & biotechnology 2016 v.32 no.5 pp. 86
ISSN:
0959-3993
Subject:
Saccharomyces cerevisiae; alkali treatment; beta-glucosidase; biomass; cellulose; corn cobs; endo-1,4-beta-glucanase; engineering; enzymatic hydrolysis; enzyme activity; ethanol; ethanol production; fermentation; genes; heterologous gene expression; hydrolysis; lignocellulose; nutrition; pH; peptones; synergism; urea; yeast extract; yeasts
Abstract:
... Low-cost technologies to overcome the recalcitrance of cellulose are the key to widespread utilization of lignocellulosic biomass for ethanol production. Efficient enzymatic hydrolysis of cellulose requires the synergism of various cellulases, and the ratios of each cellulase are required to be regulated to achieve the maximum hydrolysis. On the other hand, engineering of cellulolytic Saccharomyce ...
DOI:
10.1007/s11274-016-2043-2

24. Exploring biomass deconstruction by phase-contrast tomography

Author:
Augusta Isaac; Rodolfo Conti; Carlos M. Viana; Federico I. Sket; Luciano A. Montoro; André Hilger; Ingo Manke
Source:
Industrial crops and products 2016 v.86 pp. 289-294
ISSN:
0926-6690
Subject:
alkali treatment; biomass; biorefining; cell walls; crossing over; energy; enzymatic hydrolysis; ethanol; ethanol fermentation; feedstocks; glucose; image analysis; lignocellulose; renewable energy sources; surface area; temperature; tomography
Abstract:
... Alternative and renewable fuels derived from lignocellulosic biomass offer a potential alternative to conventional energy sources. Biorefinery feedstocks are usually pretreated with acid, alkali, or high temperature/pressure treatments before enzyme hydrolysis to yield glucose and other useful sugars for fermentation to ethanol. If plant cell walls are to be efficiently deconstructed by conversion ...
DOI:
10.1016/j.indcrop.2016.04.011

25. Expression of fungal acetyl xylan esterase in Arabidopsis thaliana improves saccharification of stem lignocellulose

Author:
Prashant Mohan‐Anupama Pawar; Marta Derba‐Maceluch; Sun‐Li Chong; Leonardo D. Gómez; Eva Miedes; Alicja Banasiak; Christine Ratke; Cyril Gaertner; Grégory Mouille; Simon J. McQueen‐Mason; Antonio Molina; Anita Sellstedt; Maija Tenkanen; Ewa J. Mellerowicz
Source:
Plant biotechnology journal 2016 v.14 no.1 pp. 387-397
ISSN:
1467-7644
Subject:
Aspergillus niger; lignocellulose; genetically modified organisms; fermentation; reducing sugars; cell walls; fuel production; acids; gene expression; signal peptide; cell wall components; alkali treatment; tissues; pathogens; saccharification; Arabidopsis thaliana; xylan; pectins; apoplast; biomass; ethanol; hydrolysates; xyloglucans; acetylation; biofuels; esterases; Coriolus versicolor; fungi
Abstract:
... Cell wall hemicelluloses and pectins are O‐acetylated at specific positions, but the significance of these substitutions is poorly understood. Using a transgenic approach, we investigated how reducing the extent of O‐acetylation in xylan affects cell wall chemistry, plant performance and the recalcitrance of lignocellulose to saccharification. The Aspergillus niger acetyl xylan esterase AnAXE1 was ...
DOI:
10.1111/pbi.12393

26. Fractionation of organic substances from the South African Eucalyptus grandis biomass by a combination of hot water and mild alkaline treatments

Author:
Jonas K. Johakimu; Andrew Jerome; Bruce B. Sithole; Lekha Prabashni
Source:
Wood science and technology 2016 v.50 no.2 pp. 365-384
ISSN:
0043-7719
Subject:
Eucalyptus grandis; alkali treatment; biomass; cellulose; fractionation; hemicellulose; lignin; lignocellulose; organic matter; pulp; sodium hydroxide; streams; viscosity; wood; wood chips
Abstract:
... An alternative way of fractionating lignocellulose biomass into its individual components, hemicelluloses, lignin and cellulose, was investigated. South African Eucalyptus grandis wood chips were fractionated using a combination of hot water and alkaline treatments with or without AQ. Initially, the biomass samples were treated in hot water to remove hemicelluloses. At optimum pre-fraction conditi ...
DOI:
10.1007/s00226-015-0764-2

27. Gradient Elution Moving Boundary Electrophoresis Enables Rapid Analysis of Acids in Complex Biomass-Derived Streams

Author:
Munson Matthew S.; Karp Eric M.; Nimlos Claire T.; Salit Marc; Beckham Gregg T.
Source:
ACS sustainable chemistry 2016 v.4 no.12 pp. 7175-7185
ISSN:
2168-0485
Subject:
acetates; alkali treatment; biomass; corn stover; detection limit; electrophoresis; equipment; formates; liquefaction; malates; oxalates; pyrolysis; rapid methods; succinic acid
Abstract:
... Biomass conversion processes such as pretreatment, liquefaction, and pyrolysis often produce complex mixtures of intermediates that are a substantial challenge to analyze rapidly and reliably. To characterize these streams more comprehensively and efficiently, new techniques are needed to track species through biomass deconstruction and conversion processes. Here, we present the application of an ...
DOI:
10.1021/acssuschemeng.6b02076

28. How Does Hemicelluloses Removal Alter Plant Cell Wall Nanoscale Architecture and Correlate with Enzymatic Digestibility?

Author:
Dayong Ding; Xia Zhou; Zhe Ji; Tingting You; Feng Xu
Source:
BioEnergy research 2016 v.9 no.2 pp. 601-609
ISSN:
1939-1234
Subject:
X-radiation; alkali treatment; atomic force microscopy; biofuels; biomass; cell walls; cellulose; crystal structure; enzymatic hydrolysis; hemicellulose; image analysis; lignocellulose; spectroscopy
Abstract:
... Thorough understanding of how hemicelluloses removal influences cell wall nanoscale architecture and cellulose digestion is of crucial importance for enabling low-cost industrial conversion of lignocellulosic biomass to renewable biofuels. In this work, delignified poplar cell walls, after various degrees of hemicelluloses removal, were characterized by Fourier transform infrared imaging spectrosc ...
DOI:
10.1007/s12155-015-9703-1

29. Hydrodynamic cavitation-assisted alkaline pretreatment as a new approach for sugarcane bagasse biorefineries

Author:
Ruly Terán Hilares; Júlio César dos Santos; Muhammad Ajaz Ahmed; Seok Hwan Jeon; Silvio Silvério da Silva; Jong-In Han
Source:
Bioresource technology 2016 v.214 pp. 609-614
ISSN:
0960-8524
Subject:
alkali treatment; biomass; biorefining; enzymatic hydrolysis; glucans; hydrodynamics; lignin; lignocellulose; response surface methodology; sodium hydroxide; sugarcane bagasse
Abstract:
... Hydrodynamic cavitation (HC) was employed in order to improve the efficiency of alkaline pretreatment of sugarcane bagasse (SCB). Response surface methodology (RSM) was used to optimize pretreatment parameters: NaOH concentration (0.1–0.5M), solid/liquid ratio (S/L, 3–10%) and HC time (15–45min), in terms of glucan content, lignin removal and enzymatic digestibility. Under an optimal HC condition ...
DOI:
10.1016/j.biortech.2016.05.004

30. Hydrolysis of pretreated rice straw by an enzyme cocktail comprising acidic xylanase from Aspergillus sp. for bioethanol production

Author:
Leya Thomas; Binod Parameswaran; Ashok Pandey
Source:
Renewable energy 2016 v.98 pp. 9-15
ISSN:
0960-1481
Subject:
Aspergillus; alkali treatment; beta-glucosidase; bioethanol; biomass; carbon; endo-1,4-beta-xylanase; enzymatic hydrolysis; ethanol production; glycosidic linkages; hydrolysis; inoculum; lignocellulose; nitrogen; pH; reducing sugars; rice straw; saccharification; solid state fermentation; spores; temperature; wheat bran; xylan; yeast extract; India
Abstract:
... The most crucial enzyme involved in xylan hydrolysis is endoxylanase which cleaves the internal glycosidic bonds of xylan. The aim of this work was to study the production of extracellular xylanase by a locally isolated strain of Aspergillus sp. under solid-state fermentation (SSF) and to evaluate the potential of the enzyme in enzymatic hydrolysis of pretreated rice straw. Xylanase production rea ...
DOI:
10.1016/j.renene.2016.05.011

31. Improvement of radio frequency (RF) heating-assisted alkaline pretreatment on four categories of lignocellulosic biomass

Author:
Xiaofei Wang; Steven Taylor; Yifen Wang
Source:
Bioprocess and biosystems engineering 2016 v.39 no.10 pp. 1539-1551
ISSN:
1615-7591
Subject:
Fourier transform infrared spectroscopy; Panicum virgatum; Pinus taeda; alkali treatment; biomass; cellulose; corn stover; crops; dielectric heating; enzymatic hydrolysis; gas chromatography-mass spectrometry; hardwood; heat; hydrolysates; hydrolysis; lignocellulose; pyrolysis; radio waves; researchers; scanning electron microscopy; soaking; sodium hydroxide; softwood
Abstract:
... Pretreatment plays an important role in making the cellulose accessible for enzyme hydrolysis and subsequent conversion because it destroys more or less resistance and recalcitrance of biomass. Radio frequency (RF)-assisted dielectric heating was utilized in the alkaline pretreatment on agricultural residues (corn stover), herbaceous crops (switchgrass), hardwood (sweetgum) and softwood (loblolly ...
DOI:
10.1007/s00449-016-1629-2

32. Isolation and characterization of starch from babassu mesocarp

Author:
Bianca Chieregato Maniglia; Delia R. Tapia-Blácido
Source:
Food hydrocolloids 2016 v.55 pp. 47-55
ISSN:
0268-005X
Subject:
Attalea; alkali treatment; amylopectin; amylose; animals; antioxidant activity; babassu oil; biomass; byproducts; crystal structure; hydrocolloids; ingredients; mesocarp; particle size distribution; phenolic compounds; soaking; solubility; starch granules; swelling (materials); thermal stability
Abstract:
... Despite being rich in starch, babassu mesocarp, a by-product of babassu oil extraction, has only been explored as animal food and biomass. This work aimed to isolate starch from babassu mesocarp by either steeping alkaline (AS) or steeping in water (WS) and to characterize these starches. Compared with the WS method, the AS method provided purer starch (99%) in larger yield (85%), however caused l ...
DOI:
10.1016/j.foodhyd.2015.11.001

33. King Grass: A very promising material for the production of second generation ethanol in tropical countries

Author:
Eliana Cardona; Jorge Rios; Juan Peña; Mariana Peñuela; Luis Rios
Source:
Biomass and bioenergy 2016 v.95 pp. 206-213
ISSN:
0961-9534
Subject:
acid hydrolysis; alkali treatment; ammonia; biomass; delignification; ethanol; ethanol production; food crops; grasses; hybrids; hydrogen peroxide; lignin; mixing; pH; reducing sugars; soaking; sodium hydroxide; soil; sugarcane bagasse; sulfuric acid; temperature; Colombia
Abstract:
... King Grass is a fast growing, high yield, hybrid grass that grows in a variety of soil conditions and does not compete with food crops. King Grass is perennial and can be harvested several times per year. Therefore it has a high potential for ethanol production in tropical countries. The pretreatments alkaline delignification (66.6–133 °C, 30–180 min, solid to liquid ratio 1:13.3–1:20 wt and NaOH ...
DOI:
10.1016/j.biombioe.2016.10.008

34. Modelling of pretreatment and saccharification with different feedstocks and kinetic modeling of sorghum saccharification

Author:
N. Prathyusha; Reddi Kamesh; K. Yamuna Rani; C. Sumana; S. Sridhar; R.S. Prakasham; V.V.N. Yashwanth; G. Sheelu; M. Pradeep Kumar
Source:
Bioresource technology 2016 v.221 pp. 550-559
ISSN:
0960-8524
Subject:
alkali treatment; bamboos; biomass; cellulose; delignification; feedstocks; hemicellulose; kinetics; lignin; models; saccharification; temperature; wheat straw
Abstract:
... Experiments have been performed for pretreatment of sorghum, wheat straw and bamboo through high temperature alkali pretreatment with different alkaline loading and temperatures, and the data on extent of delignification in terms of the final compositions of cellulose, hemicellulose and lignin have been generated. Further, enzymatic saccharification has been carried out in all the cases to find th ...
DOI:
10.1016/j.biortech.2016.09.007

35. Novel Biomass Pretreatment Using Alkaline Organic Solvents: A Green Approach for Biomass Fractionation and 2,3-Butanediol Production

Author:
Yadhu N. Guragain; Krishna P. Bastola; Ronald L. Madl; Praveen V. Vadlani
Source:
BioEnergy research 2016 v.9 no.2 pp. 643-655
ISSN:
1939-1234
Subject:
Klebsiella oxytoca; Pseudotsuga menziesii; acetonitrile; alkali treatment; biomass; biorefining; butanol; catalysts; cellulose; corn stover; dimethyl sulfoxide; ethanol; feedstocks; fermentation; fractionation; glycerol; grasses; hardwood; hemicellulose; hydrolysis; industry; isopropyl alcohol; lignin; lignocellulose; sodium hydroxide; softwood; solvents; streams
Abstract:
... Valorization of each component of lignocellulosic biomass is critical for sustainability of biorefinery industries. Current biorefineries are confined to ethanol-centric processes and focus only on the carbohydrate-derived sugar using energy-intensive pretreatment methods, leading to deteriorated lignin quality for high-value applications. Organosolv fractionation is an effective method to improve ...
DOI:
10.1007/s12155-015-9706-y

36. Novel pretreatment pathways for dissolution of lignocellulosic biomass based on ionic liquid and low temperature alkaline treatment

Author:
Ellinor B. Heggset; Kristin Syverud; Karin Øyaas
Source:
Biomass and bioenergy 2016 v.93 pp. 194-200
ISSN:
0961-9534
Subject:
Picea abies; acetates; alkali treatment; biomass; cellulose; digestibility; enzymatic hydrolysis; fractionation; hemicellulose; hydrolysis; ionic liquids; lignin; lignocellulose; sodium hydroxide; softwood; temperature; urea
Abstract:
... Pretreatment, fractionation and hydrolysis remains costly and challenging process steps in biochemical conversion of softwoods. Here, ionic liquid pretreatment using 1-ethyl-3-methylimidazolium acetate (EMIM-OAc) at high temperature (100 °C, 6 h) and alkali based (NaOH/urea) pretreatment at sub-zero temperature (−18 °C, 24 h) were compared and combined in studies of Norway Spruce biomass deconstru ...
DOI:
10.1016/j.biombioe.2016.07.023

37. Pilot-Scale Batch Alkaline Pretreatment of Corn Stover

Author:
Kuhn Erik M.; O’Brien Marykate H.; Ciesielski Peter N.; Schell Daniel J.
Source:
ACS sustainable chemistry 2016 v.4 no.3 pp. 944-956
ISSN:
2168-0485
Subject:
sodium hydroxide; solubilization; anthraquinones; cell walls; glucose; xylose; cellulose; biorefining; screening; molecular weight; alkali treatment; high-value products; xylan; models; temperature; biomass; lignin; hydroxyl radicals; experimental design; enzymatic hydrolysis; biofuels; corn stover
Abstract:
... The goal of biomass pretreatment is to increase the enzymatic digestibility of the plant cell wall polysaccharides to produce sugars for upgrading to biofuels. Alkaline pretreatment has the ability to solubilize much of the lignin in biomass while the carbohydrates remain insoluble. With an increased research focus to produce high-value products from lignin, a low molecular weight, lignin-rich str ...
DOI:
10.1021/acssuschemeng.5b01041

38. Potential use of alkaline treated algae waste biomass as sustainable biosorbent for clean recovery of cadmium(II) from aqueous media: batch and column studies

Author:
Dumitru Bulgariu; Laura Bulgariu
Source:
Journal of cleaner production 2016 v.112 pp. 4525-4533
ISSN:
0959-6526
Subject:
algae; alkali treatment; batch systems; biomass; biosorbents; biosorption; cadmium; desorption; models; oils; pH; sorption isotherms; wastewater
Abstract:
... In order to make it more suitable for biosorption process, algae waste obtained after oil extraction, have been activated by alkaline treatment and used for cadmium(II) removal in batch and column systems. For batch systems, the effect of initial cadmium(II) concentration and contact time was studied in optimal experimental conditions (pH of 5.0, 8 g biomass·L⁻¹). Langmuir isotherm model and pseud ...
DOI:
10.1016/j.jclepro.2015.05.124

39. Pre-treatment of sugarcane bagasse with a combination of sodium hydroxide and lime for improving the ruminal degradability: optimization of process parameters using response surface methodology

Author:
Farhad Ahmadi; Mohammad Javad Zamiri; Mohammad Khorvash; Esmaeil Ziaee; Igor Polikarpov
Source:
Journal of applied animal research 2016 v.44 no.1 pp. 287-296
ISSN:
0974-1844
Subject:
alkali treatment; biomass; delignification; models; neutral detergent fiber; organic matter; response surface methodology; sodium hydroxide; sugarcane bagasse; temperature
Abstract:
... A three-factor, three-level, face-centred cubic design was adopted to investigate the effect of three pre-treatment parameters, namely sodium hydroxide-to-dry biomass ratio [0.00, 0.05, and 0.10 (w/w)], lime-to-dry biomass ratio [0.00, 0.05, and 0.10 (w/w)] and residence reaction time (24, 96, and 168 h), at moderate temperature (21°C) on 24-h cumulative gas production (GP ₂₄) and delignification, ...
DOI:
10.1080/09712119.2015.1031783

40. Pretreatment of rye straw with aqueous ammonia for conversion to fermentable sugars as a potential substrates in biotechnological processes

Author:
Jaroslaw Domanski; Sebastian Borowski; Olga Marchut-Mikolajczyk; Przemyslaw Kubacki
Source:
Biomass and bioenergy 2016 v.91 pp. 91-97
ISSN:
0961-9534
Subject:
Fourier transform infrared spectroscopy; alkali treatment; ammonia; atmospheric pressure; biomass; chemical oxygen demand; glucose; hydrolysates; hydrolysis; lignin; lignocellulose; pH; reducing sugars; rye straw; scanning electron microscopy; temperature; volatile fatty acids
Abstract:
... Alkaline pretreatment causes the disruptions in the lignin structure and breaks the linkage between lignin and the other carbohydrate fractions in lignocellulosic biomass. The aim of the current study was to investigate the possibility of rye straw hydrolysis with 2% aqueous ammonia for 0–8 h, at 60 °C and 90 °C, under atmospheric pressure. The study investigated how rye straw hydrolysis with aque ...
DOI:
10.1016/j.biombioe.2016.05.008

41. Process intensification of delignification and enzymatic hydrolysis of delignified cellulosic biomass using various process intensification techniques including cavitation

Author:
Karuna Narsappa Nagula; Aniruddha Bhalchandra Pandit
Source:
Bioresource technology 2016 v.213 pp. 162-168
ISSN:
0960-8524
Subject:
biological treatment; laccase; sodium hydroxide; delignification; ultrasonic treatment; cellulose; enzymatic hydrolysis; Cenchrus purpureus; temperature; alkali treatment; lignin; biomass
Abstract:
... Different methods of pretreatment including alkali treatment, treatment with ultrasound, biological treatment using laccase enzyme and combined treatment like ultrasound-laccase for Napier grass have been tried. With alkali pretreatment optimized conditions obtained were sodium hydroxide 0.3% w/v giving 86% delignification at temperature of 80°C, treatment time of 2h. In physical methods of treatm ...
DOI:
10.1016/j.biortech.2016.03.152

42. Simultaneous saccharification and fermentation of cactus pear biomass—evaluation of using different pretreatments

Author:
Pedro Ferreira de Souza Filho; Vitor Troccoli Ribeiro; Everaldo Silvino dos Santos; Gorete Ribeiro de Macedo
Source:
Industrial crops and products 2016 v.89 pp. 425-433
ISSN:
0926-6690
Subject:
Ficus benghalensis; Opuntia ficus-indica; Saccharomyces cerevisiae; alkali treatment; bioethanol; biomass; cactus pears; cellulose; cladodes; crystal structure; delignification; drought; enzymatic hydrolysis; ethanol production; experimental design; fermentation; hemicellulose; hydrogen peroxide; lignin; lignocellulose; production costs; saccharification; sodium hydroxide; sulfuric acid; temperature; water stress
Abstract:
... Lignocellulosic biomasses of two species of cactus pear (Opuntia ficus indica and Nopalea cochenillifera) were tested for the production of ethanol. Their ability to grow in water-stressed regions makes them eligible for reducing the production cost of biofuels in drought regions. The biomass was pretreated using three different strategies: alkaline hydrogen peroxide, alkaline using NaOH, and acid ...
DOI:
10.1016/j.indcrop.2016.05.028

43. Suitability assessment of a continuous process combining thermo-mechano-chemical and bio-catalytic action in a single pilot-scale twin-screw extruder for six different biomass sources

Author:
Virginie Vandenbossche; Julien Brault; Oscar Hernandez-Melendez; Philippe Evon; Eduardo Barzana; Gérard Vilarem; Luc Rigal
Source:
Bioresource technology 2016 v.211 pp. 146-153
ISSN:
0960-8524
Subject:
alkali treatment; biomass; enzymatic hydrolysis; glucose; hemicellulose; lignin; lignocellulose; neutralization; organic matter; saccharification
Abstract:
... A process has been validated for the deconstruction of lignocellulose on a pilot scale installation using six types of biomass selected for their sustainability, accessibility, worldwide availability, and differences of chemical composition and physical structure. The process combines thermo-mechano-chemical and bio-catalytic action in a single twin-screw extruder. Three treatment phases were sequ ...
DOI:
10.1016/j.biortech.2016.03.072

44. Typical conversion of lignocellulosic biomass into reducing sugars using dilute acid hydrolysis and alkaline pretreatment

Author:
Yu-Loong Loow; Ta Yeong Wu; Jamaliah Md. Jahim; Abdul Wahab Mohammad; Wen Hui Teoh
Source:
Cellulose 2016 v.23 no.3 pp. 1491-1520
ISSN:
0969-0239
Subject:
acid hydrolysis; alkali treatment; alkaline hydrolysis; biofuels; biomass; biotransformation; cellulose; economic sustainability; enzymatic hydrolysis; fermentation; fossil fuels; hemicellulose; hot water treatment; lignin; lignocellulose; reducing sugars
Abstract:
... The development and production of fossil fuel alternatives have become one of the main focal points in recent investigations. Lignocellulosic biomass is a renewable source of fermentable sugars for second-generation biofuels and chemicals via biotechnological pathways. However, the presence of lignin and hemicellulose in lignocellulosic biomass makes it difficult for the biomass to be hydrolyzed o ...
DOI:
10.1007/s10570-016-0936-8

45. Utilization of Calophyllum inophyllum shell and kernel oil cake for reducing sugar production

Author:
Yu-Shen Cheng; Jang-Hong Wu; Li-Hsien Yeh
Source:
Bioresource technology 2016 v.212 pp. 338-341
ISSN:
0960-8524
Subject:
Calophyllum inophyllum; alkali treatment; biomass; delignification; enzymatic hydrolysis; feedstocks; lignin; oilseed cakes; reducing sugars; solvents
Abstract:
... This study is aimed at fully utilizing fruit biomass of Calophyllum inophyllum for reducing sugar production. The effects of pretreatment conditions and post reaction wash on the lignin removal and enzymatic hydrolysis of shell were investigated. The oil cake was also subjected to solvent extraction followed by enzymatic hydrolysis. The results showed that the sequential acid/alkaline pretreatment ...
DOI:
10.1016/j.biortech.2016.04.069

46. Valorization of Winery Spent Yeast Waste Biomass as a New Source for the Production of β-Glucan

Author:
Vassileios Varelas; Panagiotis Tataridis; Maria Liouni; Elias T. Nerantzis
Source:
Waste and biomass valorization 2016 v.7 no.4 pp. 807-817
ISSN:
1877-2641
Subject:
acetic acid; acetic acid bacteria; alkali treatment; autolysis; beta-glucans; biomass; fermentation; functional foods; lees; lignin; polyphenols; red wines; sodium hydroxide; solid wastes; value-added products; white wines; wine industry; wood; yeast extract; yeasts
Abstract:
... In this paper we report the first isolation of yeast β-glucan from a new source, winery spent yeast biomass and its production with an environmental friendly oriented method. β-Glucan has been isolated from brewery wastes and proposed for various applications in food industry but until now the winery solid wastes have not been treated for this purpose. The aim of this study was dual. Firstly, the ...
DOI:
10.1007/s12649-016-9530-4