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1. Production of Ethyl Esters by Direct Transesterification of Microalga Biomass Using Propane as Pressurized Fluid

Author:
Marcon, Naiane Sabedot; Colet, Rosicler; Bibilio, Denise; Graboski, Adriana Marcia; Steffens, Clarice; Rosa, Clarissa Dalla
Source:
Applied biochemistry and biotechnology 2019 v.187 no.4 pp. 1285-1299
ISSN:
0273-2289
Subject:
Chlorella vulgaris,   etc   ; biomass; catalysts; esters; microalgae; propane; temperature; transesterification;     Show all 8 Subjects
Abstract:
... This work aimed to produce ethyl esters from Chlorella vulgaris microalgae biomass, using an immobilized enzymatic catalyst associated with pressurized fluid (propane) by direct transesterification. In order to optimize the ethyl conversion, different temperatures (46.7–68.1 °C) and pressures (59.5–200.5 bar) were applied a central composite design rotational (CCDR) obtaining the high conversion ( ...
DOI:
10.1007/s12010-018-2882-4

2. Accelerated productions and physicochemical characterizations of different extracellular polymeric substances from Chlorella vulgaris with nano-ZnO

Author:
Zhao, Jinfeng; Liu, Shixiang; Liu, Na; Zhang, Han; Zhou, Qiongzhi; Ge, Fei
Source:
The Science of the total environment 2019 v.658 pp. 582-589
ISSN:
0048-9697
Subject:
Chlorella vulgaris,   etc   ; moieties; nanoparticles; organic carbon; polysaccharides; proteins; zinc oxide;     Show all 7 Subjects
Abstract:
... Extracellular polymeric substances (EPS) play significant roles in protecting cells against environmental stresses. However, little information is known about the roles of different EPS in these processes. In this study, the productions and physicochemical characterizations of soluble-EPS (S-EPS) and bound-EPS (B-EPS), the two different fractions of EPS from a green alga Chlorella vulgaris under t ...
DOI:
10.1016/j.scitotenv.2018.12.019

3. Gemini surfactant: A novel flotation collector for harvesting of microalgae by froth flotation

Author:
Huang, Zhiqiang; Cheng, Chen; Liu, Zuwen; Luo, Wuhui; Zhong, Hong; He, Guichun; Liang, Changli; Li, Liqing; Deng, Lanqing; Fu, Weng
Source:
Bioresource technology 2019 v.275 pp. 421-424
ISSN:
0960-8524
Subject:
Chlorella vulgaris,   etc   ; cetyltrimethylammonium bromide; culture media; harvesting; hydrophobicity; microalgae; surfactants;     Show all 7 Subjects
Abstract:
... Froth flotation has been proved to be a promising approach for commercial scale harvesting of microalgae. However, all the surfactants used in the microalgae flotation harvesting process are conventional monomeric surfactants contain a single similar hydrophobic group in the molecule, which results in a low harvesting efficiency. In this work, a novel Gemini surfactant, N,N′-bis(cetyldimethyl)-1,4 ...
DOI:
10.1016/j.biortech.2018.12.106

4. A semi-mechanistic model describing the influence of light and temperature on the respiration and photosynthetic growth of Chlorella vulgaris

Author:
Manhaeghe, Dave; Michels, Siemon; Rousseau, Diederik P.L.; Van Hulle, Stijn W.H.
Source:
Bioresource technology 2019 v.274 pp. 361-370
ISSN:
0960-8524
Subject:
Chlorella vulgaris,   etc   ; data collection; heat stress; microalgae; models; photoinhibition; temperature;     Show all 7 Subjects
Abstract:
... The influence of light and temperature on microalgae kinetics has been assessed extensively and many models have been developed. However, limited attention has been paid to the influence of light and temperature on microalgae respiration and growth under conditions inducing (strong) photoinhibition and no clear consensus has been made on which model to use. Based on experimental data collected usi ...
DOI:
10.1016/j.biortech.2018.11.097

5. Growth-dependent radiative properties of Chlorella vulgaris and its influence on prediction of light fluence rate in photobioreactor

Author:
Ma, C. Y.; Zhao, J. M.; Liu, L. H.; Zhang, L.
Source:
Journal of applied phycology 2019 v.31 no.1 pp. 235-247
ISSN:
0921-8971
Subject:
Chlorella vulgaris,   etc   ; absorption; developmental stages; extinction; microalgae; models; photobioreactors; prediction;     Show all 8 Subjects
Abstract:
... The radiative properties of microalgae (the absorption cross-section, scattering cross-section, and scattering phase function) are essential for analyzing the light transfer in photobioreactors (PBRs). Due to the growth of microalgal cells, their radiative properties will vary with time. However, the growth-dependent radiative properties of microalgal cells have been rarely considered in the liter ...
DOI:
10.1007/s10811-018-1499-x

6. Catalytic pyrolysis of Chlorella vulgaris: Kinetic and thermodynamic analysis

Author:
Fong, Melissa Jia Bao; Loy, Adrian Chun Minh; Chin, Bridgid Lai Fui; Lam, Man Kee; Yusup, Suzana; Jawad, Zeinab Abbas
Source:
Bioresource technology 2019 v.289 pp. 121689
ISSN:
0960-8524
Subject:
Chlorella vulgaris,   etc   ; biomass; catalysts; catalytic activity; energy; heat; limestone; pyrolysis; thermogravimetry; zeolites;     Show all 10 Subjects
Abstract:
... In the present study, catalytic pyrolysis of Chlorella vulgaris biomass was conducted to analyse the kinetic and thermodynamic performances through thermogravimetric approach. HZSM-5 zeolite, limestone (LS), bifunctional HZSM-5/LS were used as catalysts and the experiments were heated from 50 to 900 °C at heating rates of 10–100 °C/min. Iso-conversional model-free methods such as Flynn-Wall-Ozawa ...
DOI:
10.1016/j.biortech.2019.121689

7. Effect of light on the transformation of BDE-47 by living and autoclaved cultures of Microcystis flos-aquae and Chlorella vulgaris

Author:
Chalifour, Annie; Chin, Wing Yee; Leung, Pui Ying; Cheung, Siu Gin; Tam, Nora Fung-Yee
Source:
Chemosphere 2019 v.233 pp. 140-148
ISSN:
0045-6535
Subject:
Chlorella vulgaris,   etc   ; Microcystis flos-aquae; autoclaving; hydroxylation; light intensity; photons; polybrominated diphenyl ethers; toxicity; wastewater treatment;     Show all 9 Subjects
Abstract:
... Polybrominated diphenyl ethers (PBDEs) are ubiquitous and toxic contaminants found in high concentrations in watercourses, and are not well removed by conventional wastewater treatment facilities. This study aimed to evaluate the removal and transformation of BDE-47, one of the environmentally predominant PBDE congener, by a green alga (Chlorella vulgaris) and a cyanobacterium (Microcystis flos-aq ...
DOI:
10.1016/j.chemosphere.2019.05.189

8. Extracellular polysaccharide produced by Chlorella vulgaris – Chemical characterization and anti-asthmatic profile

Author:
Barboríková, Jana; Šutovská, Martina; Kazimierová, Ivana; Jošková, Marta; Fraňová, Soňa; Kopecký, Jiří; Capek, Peter
Source:
International journal of biological macromolecules 2019 v.135 pp. 1-11
ISSN:
0141-8130
Subject:
Chlorella vulgaris,   etc   ; animals; asthma; bioactive properties; carbohydrate binding; industrial applications; inflammation; metabolites; methylation; microalgae; polysaccharides; sugars;     Show all 12 Subjects
Abstract:
... Microalgae are the lowest plant organisms producing a wide range of metabolites that make them interesting organisms for industrial applications. Cultivation of green microalgal species Chlorella vulgaris resulted a significant production of extracellular polysaccharide (EPS). Preliminary chemico-spectroscopic studies on EPS revealed its molecular profile, a complex primary structure consisting of ...
DOI:
10.1016/j.ijbiomac.2019.05.104

9. Quantitative assessment of photosynthetic activity of Chlorella (Class Trebouxiophyceae) adsorbed onto soil by using fluorescence imaging

Author:
Nam, Sun-Hwa; Lee, Jieun; An, Youn-Joo
Source:
Environmental pollution 2019
ISSN:
0269-7491
Subject:
Chlorella vulgaris,   etc   ; Chlamydomonas reinhardtii; Chlorella sorokiniana; Chlorococcum; algae; fluorescence; image analysis; photosynthesis; soil; soil pollution; toxicity;     Show all 11 Subjects
Abstract:
... In the present study, we evaluate our previously developed non-destructive soil algal toxicity method using species from a different class of algae; Class Trebouxiophyceae (Chlorella vulgaris and Chlorella sorokiniana), and directly measure the photosynthetic activity of these species adsorbed onto the soil as a new toxicity endpoint. This study shows that non-destructive soil algal toxicity metho ...
DOI:
10.1016/j.envpol.2019.07.110

10. Adaptive morphology of Euchlanis cf. mikropous Koch-Althaus, 1962 (Rotifera: Euchlanidae) exposed directly and indirectly to invertebrate predators

Author:
Nandini, S.; Sarma, S.S.S.
Source:
Limnologica 2019 pp. 125693
ISSN:
0075-9511
Subject:
Chlorella vulgaris,   etc   ; Platyhelminthes; Rotifera; eggs; females; invertebrates; longevity; population growth; predators; rivers; water hardness; Mexico;     Show all 12 Subjects
Abstract:
... We have been culturing a species of Euchlanis cf. mikropous isolated from a river in Mexico. This species frequently loses its toes, which then reappear in successive generations. We studied the population dynamics of this species at different food levels of Chlorella vulgaris (0.25 × 106, 0.5 × 106 and 1.0 × 106 cells ml-1) and in the direct and indirect presence of the invertebrate predators Ste ...
DOI:
10.1016/j.limno.2019.125693

11. Utilization of sugarcane industry effluent for high value biomass and photosynthetic pigments production of Chlorella vulgaris (PSBDU06)

Author:
Jasmin Nivetha, B.; Bhakyalakshmi, S.V.; Dinesh Kumar, S.; Santhanam, P.; Vijayalakshmi, D.; Divya, M.; Krishnaveni, N.
Source:
Bioresource technology reports 2019 pp. 100260
ISSN:
2589-014X
Subject:
Chlorella vulgaris,   etc   ; algae; biomass; nutrients; photosynthesis; pigments; pollutants; potassium nitrate; sugar industry; sugarcane; sugarcane byproducts;     Show all 11 Subjects
Abstract:
... A huge amount of pollutant free water required for sugarcane processing industry to obtain sugarcane byproducts. It is estimated that approximately 1–2 m3 of water being used to practice 1 ton of sugarcane and this process will generate 1 m3 as polluted effluent. This work has been dealt with treating sugarcane industry (SCI) effluent by bio cultivation of Chlorella vulgaris (PSBDU06). The cultiva ...
DOI:
10.1016/j.biteb.2019.100260

12. Characterization of cometabolic degradation of p-cresol with phenol as growth substrate by Chlorella vulgaris

Author:
Xiao, Meng; Ma, Honglei; Sun, Meng; Yin, Xiangyang; Feng, Qingmin; Song, Hongbing; Gai, Hengjun
Source:
Bioresource technology 2019 v.281 pp. 296-302
ISSN:
0960-8524
Subject:
Chlorella vulgaris,   etc   ; ammonium nitrogen; antioxidants; coal; enzyme activity; gasification; p-cresol; phenol; sodium bicarbonate; wastewater;     Show all 10 Subjects
Abstract:
... To investigate the potential application of Chlorella vulgaris in the treatment of coal gasification wastewater, the characteristics of phenol and p-cresol cometabolism by Chlorella vulgaris were studied, including phenol degradation, ammonia nitrogen removal, antioxidant enzyme activities, and phenol hydroxylase activity. The results showed that the highest tolerable concentrations of phenol and ...
DOI:
10.1016/j.biortech.2019.02.079

13. Toxic Effects of Selected Textile Dyes on Elemental Composition, Photosynthetic Pigments, Protein Content and Growth of a Freshwater Chlorophycean Alga Chlorella vulgaris

Author:
Gita, Samchetshabam; Shukla, S. P.; Saharan, Neelam; Prakash, Chandra; Deshmukhe, Geetanjali
Source:
Bulletin of environmental contamination and toxicology 2019 v.102 no.6 pp. 795-801
ISSN:
0007-4861
Subject:
Chlorella vulgaris,   etc   ; algae; dyes; elemental composition; fabrics; freshwater; photosynthesis; pigments; protein content; specific growth rate; toxicity;     Show all 11 Subjects
Abstract:
... Toxicity of three textile dyes—Optilan yellow, Drimarene blue and Lanasyn brown, was evaluated in a green alga Chlorella vulgaris. The unialgal populations of the alga showed a concentration-dependent decrease in specific growth rate and pigments after exposure to graded concentrations of above dyes. The elemental profile (C, H, N, S) of the treated and untreated cells showed a change which was ev ...
DOI:
10.1007/s00128-019-02599-w

14. Multiple toxicity endpoint–structure relationships for substituted phenols and anilines

Author:
Yan, Fangyou; Liu, Tingting; Jia, Qingzhu; Wang, Qiang
Source:
The Science of the total environment 2019 v.663 pp. 560-567
ISSN:
0048-9697
Subject:
Chlorella vulgaris,   etc   ; growth retardation; inhibitory concentration 50; models; phenols; prediction; quantitative structure-activity relationships; toxicity;     Show all 8 Subjects
Abstract:
... Quantitative structure–toxicity relationship (QSTR) models with the same mathematical structure were proposed for predicting the multiple toxicity endpoints of substituted phenols and anilines towards Chlorella vulgaris (C. vulgaris) based on the norm indexes. Four aquatic toxicity endpoints including growth inhibition concentrations of IC50, IC20, LOEC and NOEC towards C. vulgaris were involved i ...
DOI:
10.1016/j.scitotenv.2019.01.362

15. Cultivation of Chlorella vulgaris in sludge extracts: Nutrient removal and algal utilization

Author:
Wang, Lu; Addy, Min; Lu, Qian; Cobb, Kirk; Chen, Paul; Chen, Xiurong; Liu, Yuhuan; Wang, Hualin; Ruan, Roger
Source:
Bioresource technology 2019 v.280 pp. 505-510
ISSN:
0960-8524
Subject:
Chlorella vulgaris,   etc   ; algae; algae culture; biomass; harvesting; nutrients; saturated fatty acids; sludge; unsaturated fatty acids;     Show all 9 Subjects
Abstract:
... In order to utilize the excess sludge and reduce the cost of algal cultivation, Chlorella vulgaris was cultivated in increasing proportions of sludge extracts for simultaneous nutrients removal and algal utilization. Results showed that C. vulgaris cultivated in the 100% sludge extract gained the highest total biomass (33.98 ± 0.30 × 106 cells/mL) and showed good results in TOC (absolute value 175 ...
DOI:
10.1016/j.biortech.2019.02.017

16. The effect of recycling culture medium after harvesting of Chlorella vulgaris biomass by flocculating bacteria on microalgal growth and the functionary mechanism

Author:
Li, Yi; Zhang, Zhiyu; Duan, Yingxing; Wang, Hailei
Source:
Bioresource technology 2019 v.280 pp. 188-198
ISSN:
0960-8524
Subject:
Chlorella vulgaris,   etc   ; Bacillus (bacteria); antioxidants; bacteria; bacterial communities; biomass; culture media; flocculation; harvesting; microalgae; proteins; recycling;     Show all 12 Subjects
Abstract:
... Microalgal cultivation and harvesting are two main factors that restrict the development of microalgae. To help solve these two questions, flocculating bacteria and recycling culture medium were investigated in this study. Proteins in bacterial cells of Bacillus sp. y3 and y6 exhibited direct flocculation activities on Chlorella vulgaris cells. The recycling culture media after harvest of microalg ...
DOI:
10.1016/j.biortech.2019.01.149

17. Using magnetic materials to harvest microalgal biomass: evaluation of harvesting and detachment efficiency

Author:
Zhu, L.-D.; Hiltunen, Erkki; Li, Zhaohua
Source:
Environmental technology 2019 v.40 no.8 pp. 1006-1012
ISSN:
1479-487X
Subject:
Chlorella vulgaris,   etc   ; biomass; environmental technology; flocculants; harvesting; iron oxides; magnetic materials; magnetism; microalgae; nanoparticles; pH; yttrium;     Show all 12 Subjects
Abstract:
... Using naked iron oxide (Fe₃O₄) and yttrium iron oxide (Y₃Fe₅O₁₂) nanoparticles as flocculants, the harvesting efficiency of Chlorella vulgaris biomass was investigated. The harvesting process includes two steps, which are the separation of microalgae from the culture solution with the magnetic nanoparticles and then the separation of the algae from the magnetic nanoparticles. The optimal dosages a ...
DOI:
10.1080/09593330.2017.1415379

18. Cultivation of Chlorella vulgaris in sludge extract from resorcinol‐rich wastewater: the removal and inhibitory effect of sludge toxicity

Author:
Chen, Xiurong; Zhou, Tianjun; Wang, Xiaoxiao; Xu, Peng; Yang, Chenchen; Sun, Xiaoli; Lu, Quanling; Wang, Shanshan
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.4 pp. 1240-1248
ISSN:
0268-2575
Subject:
Chlorella vulgaris,   etc   ; biomass production; carbon; carbon metabolism; photochemical reactions; proteins; proteomics; resorcinol; sludge; toxicity; wastewater;     Show all 11 Subjects
Abstract:
... BACKGROUND: The cultivation of Chlorella vulgaris present in toxic sludge extract from resorcinol‐rich wastewater was investigated to simultaneously determine the biomass production and toxicity removal. RESULTS: A comparison of the blank and the toxic sludge extract revealed that the sludge toxicity originating from the degradation of resorcinol was highly correlated to the mass fraction at 5000– ...
DOI:
10.1002/jctb.5876

19. Non‐traditional atrazine degradation induced by zero‐valent‐copper: process optimization by the Doehlert experimental design, intermediates detection and toxicity assessment

Author:
Hollanda, Luana R; Graça, Cátia AL; Andrade, Lidiane M; Mendes, Maria A; Chiavone‐Filho, Osvaldo; Teixeira, Antonio CSC
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.4 pp. 1156-1164
ISSN:
0268-2575
Subject:
Chlorella vulgaris,   etc   ; aromatic compounds; atrazine; ecotoxicology; experimental design; metals; microalgae; organochlorine compounds; oxidation; pH; technology; toxicity;     Show all 12 Subjects
Abstract:
... BACKGROUND: Over recent years, several studies exploring new technologies capable of degrading persistent organochlorine compounds have been published. Special attention has been dedicated to atrazine (ATZ), due to its ecotoxicological relevance together with its frequent detection in the environment. Degradation of organochlorines via zero‐valent metals has gained great importance given its pract ...
DOI:
10.1002/jctb.5862

20. Identification of the pollutants’ removal and mechanism by microalgae in saline wastewater

Author:
Vo, Hoang Nhat Phong; Ngo, Huu Hao; Guo, Wenshan; Liu, Yiwen; Chang, Soon Woong; Nguyen, Dinh Duc; Nguyen, Phuoc Dan; Bui, Xuan Thanh; Ren, Jiawei
Source:
Bioresource technology 2019 v.275 pp. 44-52
ISSN:
0960-8524
Subject:
Chlorella vulgaris,   etc   ; biomass production; freshwater; microalgae; nitrate nitrogen; phosphates; pollutants; salinity; wastewater;     Show all 9 Subjects
Abstract:
... This study investigated the growth dynamics of a freshwater and marine microalgae with supported biochemical performance in saline wastewater, the pollutants assimilation by a developed method, and the mechanism of salinity’s effect to pollutants assimilation. Maximal biomass yield was 400–500 mg/L at 0.1–1% salinity while the TOC, NO3−-N, PO43−-P were eliminated 39.5–92.1%, 23–97.4% and 7–30.6%, ...
DOI:
10.1016/j.biortech.2018.12.026