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1. Proposal of operating best practices that contribute to the technical efficiency in Brazilian sugar and ethanol mills

Author:
Duarte, Alexandre; Salgado Jr, Alexandre Pereira; Lemos, Stella Vannucci; de Souza Jr, Marco Antonio Alves; Antunes, Fernanda de Almeida
Source:
Journal of cleaner production 2019 v.214 pp. 173-184
ISSN:
0959-6526
Subject:
ethanol; ethanol production,   etc   ; cane sugar; case studies; crushing; interviews; sugars;     Show all 7 Subjects
Abstract:
... Technical efficiency is one of the main performance indicators in a sugar and ethanol mill, and it can be indicated by the percentage of cane sugar recovered and transformed into sugar, ethanol, and other products. Thus, given the sector's current crisis, to increase competition and optimize the performance, productive units need to improve their efficiency in relation to the use of inputs. Theref ...
DOI:
10.1016/j.jclepro.2018.12.204

2. Linear α-alcohols production from supercritical ethanol over Cu/Al2O3 catalyst

Author:
Chistyakov, A.V.; Nikolaev, S.A.; Zharova, P.A.; Tsodikov, M.V.; Manenti, F.
Source:
Energy 2019 v.166 pp. 569-576
ISSN:
0360-5442
Subject:
ethanol,   etc   ; butanol; catalysts; water content;     Show all 4 Subjects
Abstract:
... In this paper, Cu/Al2O3 catalysts with different metal loadings was applied for the direct ethanol conversion into linear α-alcohols in the supercritical regime. 5% Cu/Al2O3 catalyst was found to provide ethanol conversion into 1-butanol, 1-hexanol and 1-octanol with 80.2% selectivity of 1-butanol or total selectivity of linear α-alcohols of 95.5 at 33.5% conversion of ethanol. The supercritical c ...
DOI:
10.1016/j.energy.2018.10.071

3. Cold hydrolysis of cassava pulp and its use in simultaneous saccharification and fermentation (SSF) process for ethanol fermentation

Author:
Siriwong, Tanyaporn; Laimeheriwa, Bustomi; Aini, Uyun Nurul; Cahyanto, Muhammad Nur; Reungsang, Alissara; Salakkam, Apilak
Source:
Journal of biotechnology 2019 v.292 pp. 57-63
ISSN:
0168-1656
Subject:
ethanol; ethanol fermentation; ethanol production,   etc   ; biotransformation; cassava; hydrolysis; mathematical models; pulp; reducing sugars; saccharification;     Show all 10 Subjects
Abstract:
... The present study investigated cold hydrolysis of cassava pulp (CP) and the use of cold hydrolysis with simultaneous saccharification and fermentation (SSF) for ethanol production. Cold hydrolysis of 100 g-CP/L at 50 °C for 2 h, followed by at 30 °C for 72 h resulted in the production of 71.5 ± 1.8 g/L of reducing sugar, with a yield of 0.72 g/g-CP. A mathematical model describing the cold hydroly ...
DOI:
10.1016/j.jbiotec.2019.01.003

4. Wheat gluten hydrolysates and their fractions improve multiple stress tolerance and ethanol fermentation performances of yeast during very high-gravity fermentation

Author:
Yang, Huirong; Zong, Xuyan; Xu, Yingchao; Zeng, Yingjie; Zhao, Haifeng
Source:
Industrial crops and products 2019 v.128 pp. 282-289
ISSN:
0926-6690
Subject:
ethanol; ethanol fermentation; ethanol production,   etc   ; biomass; cell membranes; stress tolerance; wheat protein hydrolysates; yeasts;     Show all 8 Subjects
Abstract:
... Wheat gluten hydrolysates (WGH) and their fractions (0%, 20% and 40% ethanol fractions) obtained on XAD-16 were used to examine their effects on multiple stress tolerance and ethanol fermentation performances of yeast during very high-gravity (VHG) fermentation. Results showed that WGH and their fractions supplementations increased significantly osmotic/ethanol stress tolerance, growth and vitalit ...
DOI:
10.1016/j.indcrop.2018.11.026

5. Fed-batch ethanol fermentation at low temperature as a way to obtain highly concentrated alcoholic wines: Modeling and optimization

Author:
Veloso, Ivan I.K.; Rodrigues, Kaio C.S.; Sonego, Jorge L.S.; Cruz, Antonio J.G.; Badino, Alberto C.
Source:
Biochemical engineering journal 2019 v.141 pp. 60-70
ISSN:
1369-703X
Subject:
ethanol; ethanol fermentation; ethanol production,   etc   ; batch fermentation; cell viability; kinetics; models; temperature; wines; yeasts;     Show all 10 Subjects
Abstract:
... The effect of product inhibition on yeast hinders the production of wine with ethanol concentration above 80.0 g L−1 (∼10°GL) in the industrial ethanol production process commonly performed at 34 °C. Lowering the fermentation temperature is a way to produce wines with higher ethanol contents. In this work, batch fermentations were carried out at temperatures of 28, 30, 32, and 34 °C, with initial ...
DOI:
10.1016/j.bej.2018.10.005

6. Ethanol production from mixtures of Distiller’s Dried Grains with Solubles (DDGS) and corn

Author:
Li, Xiujuan; Chen, Sitong; Yu, Yang; Wang, Shengwei; Xu, Zhaoxian; Huang, He; Jin, Mingjie
Source:
Industrial crops and products 2019 v.129 pp. 59-66
ISSN:
0926-6690
Subject:
ethanol; ethanol fermentation; ethanol production,   etc   ; cellulose; coproducts; corn; cost effectiveness; dry milling; enzymatic hydrolysis; feedstocks; hydrolysates; industry; liquids; saccharification; sugars;     Show all 15 Subjects
Abstract:
... The dry milling ethanol industry produces Distillers’ Dried Grains with Solubles (DDGS) as major co-products, which are composed of unhydrolyzed and unfermented polymeric sugars. Ethanol fermentation with the mixture of DDGS and corn has the potential to reduce cost, further utilize sugars in the DDGS and increase overall ethanol production in current dry grind process. In the current study, DDGS ...
DOI:
10.1016/j.indcrop.2018.11.075

7. Production of high-concentration bioethanol from cassava stem by repeated hydrolysis and intermittent yeast inoculation

Author:
Tanaka, Kazumasa; Koyama, Mitsuhiko; Pham, Phan Thi; Rollon, Analiza Palenzuela; Habaki, Hiroaki; Egashira, Ryuichi; Nakasaki, Kiyohiko
Source:
International biodeterioration & biodegradation 2019 v.138 pp. 1-7
ISSN:
0964-8305
Subject:
ethanol; ethanol fermentation; ethanol production,   etc   ; Saccharomyces cerevisiae; acid hydrolysis; autoclaving; bioethanol; biomass; cassava; furfural; glucose; hydrolysates; temperature; xylose; yeasts;     Show all 15 Subjects
Abstract:
... Methods for obtaining high-concentration (ca. 40 g/L) ethanol from cassava stem (CS) were explored by investigating the effects of acid hydrolysis conditions, hydrolysate concentration, and intermittent inoculation of yeast on ethanol fermentation. Two-step acid hydrolysis demonstrated that a reduction in autoclaving temperature from 121 °C to 111 °C remarkably lowered the furfural concentration i ...
DOI:
10.1016/j.ibiod.2018.12.007

8. Ethanol fermentation from non-detoxified lignocellulose hydrolysate by a multi-stress tolerant yeast Candida glycerinogenes mutant

Author:
Zhao, Meilin; Shi, Dingchang; Lu, Xinyao; Zong, Hong; Zhuge, Bin; Ji, Hao
Source:
Bioresource technology 2019 v.273 pp. 634-640
ISSN:
0960-8524
Subject:
ethanol; ethanol fermentation; ethanol production,   etc   ; Candida; Saccharomyces cerevisiae; acetic acid; biomass; furfural; hydrolysates; lignocellulose; mutants; sugarcane bagasse; temperature; yeasts;     Show all 14 Subjects
Abstract:
... The aim of this work was to study ethanol fermentation properties of the robust mutant Candida glycerinogenes UG21 from non-detoxified lignocellulose hydrolysate. C. glycerinogenes UG21 with high tolerance to elevated temperature, acetic acid, and furfural was obtained and applied in lignocellulose-based ethanol production. C. glycerinogenes UG21 exhibited highly-efficient degradation ability to f ...
DOI:
10.1016/j.biortech.2018.11.053

9. Flame kernel evolution and shock wave propagation with laser ignition in ethanol-air mixtures

Author:
Bao, Xiuchao; Sahu, Amrit; Jiang, Yizhaou; Badawy, Tawfik; Xu, Hongming
Source:
Applied energy 2019 v.233-234 pp. 86-98
ISSN:
0306-2619
Subject:
ethanol,   etc   ; air; energy; photography; temperature; wavelengths;     Show all 6 Subjects
Abstract:
... Flame kernel evolution and shock wave propagation in ethanol/air mixtures with laser ignition in a constant-volume chamber was investigated by means of high-speed Schlieren photography. At initial pressure of 0.1 MPa and temperature of 333 K, ignition was performed using a pulsed laser at the second harmonic wavelength with six different laser energies from 75 to 200 mJ, for the equivalence ratios ...
DOI:
10.1016/j.apenergy.2018.10.017

10. Process integration for ethanol production from corn and corn stover as mixed substrates

Author:
Yu, Jianming; Xu, Zhaoxian; Liu, Lei; Chen, Sitong; Wang, Shengwei; Jin, Mingjie
Source:
Bioresource technology 2019 v.279 pp. 10-16
ISSN:
0960-8524
Subject:
ethanol; ethanol production,   etc   ; corn; corn stover; fermentation; hydrolysates; hydrolysis; liquefaction; mixing; saccharification;     Show all 10 Subjects
Abstract:
... This work investigated all possible process integration strategies for ethanol production from corn and dilute acid pretreated corn stover (CS) as mixed substrates. Three corn to pretreated CS ratios (20%:10%, 10%:20% and 5%:25%) were examined. When the ratio of corn to pretreated CS was 20%:10%, the process integration strategy that mixed corn with CS hydrolysate for liquefaction followed by SSF ...
DOI:
10.1016/j.biortech.2019.01.112

11. An experimental and modeling approach for ethanol production by Kluyveromyces marxianus in stirred tank bioreactor using vacuum extraction as a strategy to overcome product inhibition

Author:
Tavares, Bruna; Felipe, Maria das Graças de Almeida; dos Santos, Júlio César; Pereira, Félix Monteiro; Gomes, Simone Damasceno; Sene, Luciane
Source:
Renewable energy 2019 v.131 pp. 261-267
ISSN:
0960-1481
Subject:
ethanol; ethanol production,   etc   ; Kluyveromyces marxianus; bioreactors; fermentation; glucose; models; renewable energy sources; yeasts;     Show all 9 Subjects
Abstract:
... Vacuum ethanol removal effect on the fermentative performance of Kluyveromyces marxianus was assessed. Yeast was cultured in bench bioreactor at initial glucose concentration of 90 g L−1 in two sequential batches of 36 h, with a vacuum ethanol removal step and glucose feed before the second batch. Ethanol concentration after the first batch was 34.13 g L−1 (YP/S 0.38 g g−1; QP 0.94 g L−1.h−1), and ...
DOI:
10.1016/j.renene.2018.07.030

12. High Concentration Ethanol Production from Mixed Softwood Sawdust Waste

Author:
Asada, Chikako; Sasaki, Chizuru; Nakamura, Yoshitoshi
Source:
Waste and biomass valorization 2019 v.10 no.2 pp. 433-439
ISSN:
1877-2641
Subject:
ethanol; ethanol production,   etc   ; alcoholic fermentation; glucose; methanol; physicochemical properties; saccharification; sawdust; softwood; steam; wastes;     Show all 11 Subjects
Abstract:
... Steam explosion pretreatment with high steam pressures, i.e. 35–55 atm, was conducted for the effective conversion of mixed softwood sawdust waste into ethanol. The results show the steam explosion with high steam pressures can significantly enhance the glucose yield after enzymatic saccharification and ethanol yield after alcohol fermentation. The effects of steam pressure on physical and chemica ...
DOI:
10.1007/s12649-017-0073-0

13. Characterization of the Clostridium thermocellum AdhE, NfnAB, ferredoxin and Pfor proteins for their ability to support high titer ethanol production in Thermoanaerobacterium saccharolyticum

Author:
Cui, Jingxuan; Olson, Daniel G.; Lynd, Lee R.
Source:
Metabolic engineering 2019 v.51 pp. 32-42
ISSN:
1096-7176
Subject:
ethanol; ethanol production,   etc   ; Clostridium thermocellum; NAD (coenzyme); Thermoanaerobacterium saccharolyticum; anaerobes; enzymes; genes; lignocellulose; proteins; pyruvic acid;     Show all 11 Subjects
Abstract:
... The thermophilic anaerobes Thermoanaerobacterium saccharolyticum and Clostridium thermocellum are good candidates for lignocellulosic ethanol production. T. saccharolyticum has been successfully engineered to produce ethanol at high titer (70 g/L). The maximum ethanol titer of engineered strains of C. thermocellum is only 25 g/L. We hypothesize that one or more of the enzymes in the ethanol produc ...
DOI:
10.1016/j.ymben.2018.09.006

14. Effect of diluted hydrolysate as yeast propagation medium on ethanol production

Author:
Zhang, Kun; Wells, Polly; Liang, Yi; Love, John; Parker, David A.; Botella, Carolina
Source:
Bioresource technology 2019 v.271 pp. 1-8
ISSN:
0960-8524
Subject:
ethanol; ethanol production,   etc   ; fermentation; hydrolysates; inoculum; lactic acid; silage making; sweet sorghum; yeasts;     Show all 9 Subjects
Abstract:
... Yeast propagation using 50% diluted hydrolysate in water was utilized for the fermentation of hydrolysate derived from pre-treated ensiled sweet sorghum. The purpose was to condition the yeast to the inhibitors generated during the ensiling of sweet sorghum. The conditioned seed cultures exhibited similar fermentation performance and superior kinetics than the inoculum prepared in YPD medium. Furt ...
DOI:
10.1016/j.biortech.2018.09.080

15. Effects of nitrogen substitute and Hypericum perforatum extract on the ethanol fermentation of traditional Chinese medicine dregs

Author:
Ma, Hongzhi; Li, Hongai; Zhang, Fengying; Wang, Qunhui; Tu, Maobing
Source:
Industrial crops and products 2019 v.128 pp. 385-390
ISSN:
0926-6690
Subject:
ethanol; ethanol fermentation; ethanol production,   etc   ; Hypericum perforatum; Oriental traditional medicine; ammonium sulfate; beans; biotransformation; cellulose; food waste; nitrogen; nitrogen content; solid wastes; waste utilization;     Show all 14 Subjects
Abstract:
... Hypericum perforatum residue waste, which is obtained after the extraction of a traditional Chinese herbal medicine, contained a high concentration of cellulose that can be used for ethanol production. The addition of other wastes with high nitrogen content and the effect of residual medical components on ethanol fermentation were investigated. Among inorganic nitrogen compounds, such as (NH4)2SO4 ...
DOI:
10.1016/j.indcrop.2018.11.021

16. Mixed fermentation of Aspergillus niger and Candida shehatae to produce bioethanol with ionic-liquid-pretreated bagasse

Author:
Wu, Zaiqiang
Source:
3 Biotech 2019 v.9 no.2 pp. 41
ISSN:
2190-572X
Subject:
ethanol; ethanol fermentation; ethanol production,   etc   ; Aspergillus niger; Candida shehatae; ammonium sulfate; bagasse; bioethanol; experimental design; ionic liquids; pH; response surface methodology; sodium hydroxide;     Show all 13 Subjects
Abstract:
... In this study, bagasse was pretreated with ionic liquid (IL) 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) and 1% NaOH solution for initial activation of bagasse. A mixed fermentation of treated bagasse by Aspergillus niger and Candida shehatae showed the optimal conditions with the addition of C. shehatae 12 h later at a 1:1 proportion to A. niger. To further improve the ethanol production and ...
DOI:
10.1007/s13205-019-1570-6

17. Correction to: Acetaldehyde emission from wood induced by the addition of ethanol

Author:
Tohmura, Shin-ichiro; Ishikawa, Atsuko; Miyamoto, Kohta; Inoue, Akio
Source:
Journal of wood science 2018 v.64 no.1 pp. 65
ISSN:
1435-0211
Subject:
ethanol,   etc   ; acetaldehyde; wood;     Show all 3 Subjects
Abstract:
... The article Acetaldehyde emission from wood induced by the addition of ethanol, written by Shin-ichiro Tohmura, Atsuko Ishikawa, Kohta Miyamoto and Akio Inoue, was originally published Online First without open access. ...
DOI:
10.1007/s10086-017-1674-8

18. In vitro degradation of curcuminoids by faecal bacteria: Influence of method of addition of curcuminoids into buttermilk yoghurt

Author:
Fu, Shishan; Ajlouni, Said; Sanguansri, Luz; Ng, Ken; Augustin, Mary Ann
Source:
Food chemistry 2019 v.283 pp. 414-421
ISSN:
0308-8146
Subject:
ethanol,   etc   ; bacteria; bioavailability; buttermilk; fermentation; functional foods; intestines; yogurt;     Show all 8 Subjects
Abstract:
... The mode of delivery of curcuminoids in the manufacture of curcuminoid-fortified buttermilk yoghurts was investigated. Curcuminoids were added prior to the addition of yoghurt cultures as powdered curcuminoids or curcuminoids pre-dissolved in ethanol and added to buttermilk prior to or after yoghurt manufacture. Only a small portion (4.6–7.7%) of the total added curcuminoids in yoghurts (299 mg/10 ...
DOI:
10.1016/j.foodchem.2018.12.124

19. Rapid visual detection of nitroaromatic explosives using a luminescent europium-organic framework material

Author:
He, Ning; Gao, Mingliang; Shen, Dunpu; Li, Hongda; Han, Zhengbo; Zhao, Pengcheng
Source:
Forensic science international 2019 v.297 pp. 1-7
ISSN:
0379-0738
Subject:
ethanol,   etc   ; explosives; fluorescence; forensic sciences; screening; trinitrotoluene; washing;     Show all 7 Subjects
Abstract:
... Rapid field screening is enormously important in forensic analysis of explosives. In this article, we used a methodology based on a strong red-fluorescent europium-organic framework (Eu-MOF) material for sensitive and selective detection of picric acid, TNT, and tetryl using the fluorescence quenching effect. Results indicate that Eu-MOF can be used for the visual detection of these three explosiv ...
DOI:
10.1016/j.forsciint.2019.01.004

20. Enhancing methane production of excess sludge and dewatered sludge with combined low frequency CaO-ultrasonic pretreatment

Author:
Yuan, Hairong; Guan, Ruolin; Wachemo, Akiber Chufo; Zhu, Chao; Zou, Dexun; Li, Ying; Liu, Yanping; Zuo, Xiaoyu; Li, Xiujin
Source:
Bioresource technology 2019 v.273 pp. 425-430
ISSN:
0960-8524
Subject:
ethanol,   etc   ; acetic acid; anaerobic digestion; biodegradability; methane production; sludge;     Show all 6 Subjects
Abstract:
... Methane production of excess sludge (ES) and dewatered sludge (DS) were investigated with low frequency CaO-ultrasonic pretreatment. The results showed that the concentrations of SCOD and VFAs in pretreated ES (P-ES) and DS (P-DS) were 212.11% and 75.26%, 270.30% and 159.52% higher than those of untreated ES and DS, respectively. The contents of acetic acid and ethanol comprised 83.87%–92.88% of t ...
DOI:
10.1016/j.biortech.2018.10.040