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1. Cultivation of Chlorella vulgaris on unsterilized dairy-derived liquid digestate for simultaneous biofuels feedstock production and pollutant removal

Author:
Yuan, Zhenhong,   et al.   ; Zhu, Shunni; Feng, Siran; Xu, Zhongbin; Qin, Lei; Shang, Changhua; Feng, Pingzhong; Wang, Zhongming;     Show all 8 Authors
Source:
Bioresource technology 2019 v.285 pp. 121353
ISSN:
0960-8524
Subject:
Bacteroidetes; Chlamydiae; Chlorella vulgaris; Proteobacteria; algae culture; ammonium; bacteria; bacterial communities; biofuels; chemical oxygen demand; environmental sustainability; feedstocks; lipids; liquids; microalgae; photobioreactors; pollution control; symbiosis; viability
Abstract:
... In order to assess viability of microalgae cultivation using unsterilized dairy-derived liquid digestate (DLD) for simultaneous biofuels feedstock production and contaminant removal, four DLD concentrations (25%, 50%, 75% and 100%) were used to grow Chlorella vulgaris in batch photobioreactors (PBRs). The 25% DLD was an ideal alternative medium in that high growth rate (0.69 d−1), high lipid produ ...
DOI:
10.1016/j.biortech.2019.121353

2. Treatment of low C/N ratio wastewater and biomass production using co-culture of Chlorella vulgaris and activated sludge in a batch photobioreactor

Author:
Yuan, Zhenhong,   et al.   ; Zhu, Shunni; Qin, Lei; Feng, Pingzhong; Shang, Changhua; Wang, Zhongming;     Show all 6 Authors
Source:
Bioresource technology 2019 v.274 pp. 313-320
ISSN:
0960-8524
Subject:
Chlorella vulgaris; activated sludge; bacteria; biofuels; biomass production; carbon nitrogen ratio; chemical oxygen demand; coculture; feeds; microalgae; nutrients; photobioreactors; soil conditioners; wastewater
Abstract:
... The aim of this work was to study the performance of pollutants removal and biomass production by co-culture of Chlorella vulgaris and activated sludge in a batch photobioreactor (PBR), compared with their single system to treat a low C/N ratio (COD/N = 4.3) wastewater. The co-culture system surpassed activated sludge system in terms of nutrients removal and outperformed microalgae alone system in ...
DOI:
10.1016/j.biortech.2018.10.034

3. In situ deep eutectic solvent pretreatment to improve lignin removal from garden wastes and enhance production of bio-methane and microbial lipids

Author:
Yuan, Zhenhong,   et al.   ; Yu, Qiang; Qin, Lei; Liu, Yunyun; Sun, Yongming; Xu, Huijuan; Wang, Zhongming;     Show all 7 Authors
Source:
Bioresource technology 2019 v.271 pp. 210-217
ISSN:
0960-8524
Subject:
Roystonea regia; biocompatibility; biogas; biomass; cell walls; choline; delignification; endo-1,4-beta-glucanase; garden residues; leaves; lignin; lipids; liquids; microalgae; porosity; solvents; yeasts
Abstract:
... Biomass pretreatment can improve the conversion efficiency of bioenergy production. Liquid hot water (LHW) pretreatment is a truly green pretreatment due to its zero chemical use, but has the disadvantages of low lignin removal and pseudo-lignin formation. A modified liquid hot water (MLHW) process based on in situ synthesis of deep eutectic solvent (DES) could efficiently improve delignification ...
DOI:
10.1016/j.biortech.2018.09.056

4. Mutants of Scenedesmus sp. for purifying highly concentrated cellulosic ethanol wastewater and producing biomass simultaneously

Author:
Yuan, Zhenhong,   et al.   ; Zhang, Quan; Chang, Chun; Bai, Jing; Fang, Shuqi; Zhuang, Xinshu;     Show all 6 Authors
Source:
Journal of applied phycology 2018 v.30 no.2 pp. 969-978
ISSN:
0921-8971
Subject:
Scenedesmus; ammonium nitrogen; bioethanol; biomass production; breeding; chemical oxygen demand; ethyl methanesulfonate; lipids; microalgae; mutants; mutation; phosphorus; protein content; wastewater
Abstract:
... To purify cellulosic ethanol wastewater (CEW) and obtain algae simultaneously, culturing microalgae using CEW as the medium is a potentially promising technology. In this study, mutation breeding of Scenedesmus sp. induced by ultraviolet (UV) and ethyl methanesulfonate (EMS) was performed, and three mutant strains were screened using undiluted CEW. Among them, the mutant MU1 showed a high biomass ...
DOI:
10.1007/s10811-017-1311-3

5. One-step production of biodiesel from wet and unbroken microalgae biomass using deep eutectic solvent

Author:
Yuan, Zhenhong,   et al.   ; Pan, Ying; Alam, Md. Asraful; Wang, Zhongming; Huang, Dalong; Hu, Keqin; Chen, Hongxuan;     Show all 7 Authors
Source:
Bioresource technology 2017 v.238 pp. 157-163
ISSN:
0960-8524
Subject:
Chlorella; Chlorococcum; biodiesel; biomass; choline; fuel production; lipids; microalgae; solvents; temperature; water content
Abstract:
... One-step and Two-step methods were studied for lipid extraction from wet and unbroken (water content is 65–67%) Chlorella sp. and Chlorococcum sp. (GN38) using deep eutectic solvent (DES) treated microalgae cells. Further we optimized the extraction process and studied on its underlying mechanism. Among all DES, Choline chloride-Acetic acid (Ch-Aa) DES treatment showed optimal conditions at the ma ...
DOI:
10.1016/j.biortech.2017.04.038

6. Proteome response of Dunaliella parva induced by nitrogen limitation

Author:
Yuan, Zhenhong,   et al.   ; Shang, Changhua; Zhu, Shunni; Wang, Zhongming; Qin, Lei; Alam, Mohammad Asraful; Xie, Jun;     Show all 7 Authors
Source:
Algal research 2017 v.23 pp. 196-202
ISSN:
2211-9264
Subject:
Dunaliella; biosynthesis; genetic engineering; lipid metabolism; lipids; microalgae; nitrogen; nitrogen metabolism; photosynthesis; protein synthesis; proteins; proteome; proteomics; stress response; transcriptomics
Abstract:
... Nitrogen limitation is the most widely used method for directing metabolic flux to lipid biosynthesis in microalgae. Protein level changes induced by environmental stress could be investigated by proteomics analysis, which was a favourable approach for understanding the induction mechanisms. Although, we previously provided the results of transcriptome sequencing of Dunaliella parva under nitrogen ...
DOI:
10.1016/j.algal.2017.01.016

7. Metabolic acclimation mechanism in microalgae developed for CO2 capture from industrial flue gas

Author:
Yuan, Zhenhong,   et al.   ; Guo, Ying; Xu, Jingliang; Wang, Zhongming; Yuan, Tao; Zhou, Weizheng; Xu, Jin; Liang, Cuiyi; Xu, Huijuan; Liu, Shijie;     Show all 10 Authors
Source:
Algal research 2017 v.26 pp. 225-233
ISSN:
2211-9264
Subject:
acclimation; algae culture; bioreactors; carbon; carbon dioxide; flue gas; industrial applications; metabolites; microalgae; physiology
Abstract:
... Microalgae are the potential choice in diverting carbon emission from industrial plants. Owing to the high CO2 concentrations, industrial flue gas can constrain the growth of most microalgae. A continuous transfer procedure was developed to select a tolerant microalgae species to feed on CO2-rich industrial flue gas. The ability to capture CO2 by the developed microalgae species is verified in a c ...
DOI:
10.1016/j.algal.2017.07.029

8. Production of d-psicose from d-glucose by co-expression of d-psicose 3-epimerase and xylose isomerase

Author:
Yuan, Zhenhong,   et al.   ; Chen, Xiaoyan; Wang, Wen; Xu, Jingliang; Yuan, Tao; Zhang, Yu; Liang, Cuiyi; He, Minchao; Guo, Ying;     Show all 9 Authors
Source:
Enzyme and Microbial Technology 2017
ISSN:
0141-0229
Subject:
Agrobacterium radiobacter; Escherichia coli; cobalt; gene expression; genes; glucose; hydrolysates; magnesium; microalgae; pH; plasmids; psicose; sugarcane bagasse; synergism; xylose isomerase
Abstract:
... d-Psicose has been drawing increasing attention in recent years because of its medical and health applications. The production of d-psicose from d-glucose requires the co-expression and synergistic action of xylose isomerase and d-psicose 3-epimerase. To co-express these genes, vector pET-28a(+)-dual containing two T7 promoters and RBS sites and an Multiple Cloning Sites was constructed using the ...
DOI:
10.1016/j.enzmictec.2017.06.003

9. Microalgae pretreatment with liquid hot water to enhance enzymatic hydrolysis efficiency

Author:
Yuan, Zhenhong,   et al.   ; Yuan, Tao; Li, Xiekun; Xiao, Shiyuan; Guo, Ying; Zhou, Weizheng; Xu, Jingliang;     Show all 7 Authors
Source:
Bioresource technology 2016 v.220 pp. 530-536
ISSN:
0960-8524
Subject:
Scenedesmus; enzymatic hydrolysis; ethanol production; glucose; microalgae; raw materials; response surface methodology; scanning electron microscopy; temperature
Abstract:
... Nowadays, microalgae are being considered as promising raw material for bioethanol production. In this work, three process variables during liquid hot water (LHW) pretreatment prior to enzymatic hydrolysis by response surface methodology on Scenedesmus sp. WZKMT were investigated to enhance glucose recovery. Results indicated that the order of significance for three parameters was temperature>soli ...
DOI:
10.1016/j.biortech.2016.08.117

10. A new approach of microalgal biomass pretreatment using deep eutectic solvents for enhanced lipid recovery for biodiesel production

Author:
Yuan, Zhenhong,   et al.   ; Lu, Weidong; Alam, Md. Asraful; Pan, Ying; Wu, Jingcheng; Wang, Zhongming;     Show all 6 Authors
Source:
Bioresource technology 2016 v.218 pp. 123-128
ISSN:
0960-8524
Subject:
Chlorella; Fourier transform infrared spectroscopy; biodiesel; biomass; carbohydrate content; choline; fatty acid composition; fuel production; microalgae; palmitic acid; palmitoleic acid; scanning electron microscopes; scanning electron microscopy; solvents; stearic acid; thermogravimetry
Abstract:
... The biomass of Chlorella sp. was pretreated with three different aqueous deep eutectic solvents (aDESs), i.e. aqueous choline chloride-oxalic acid (aCh-O), aqueous choline chloride-ethylene glycol (aCh-EG) and aqueous urea-acetamide (aU-A). The effect of aDESs pretreatment of microalgae biomass was evaluated in terms of lipid recovery rate, total carbohydrate content, fatty acid composition, and t ...
DOI:
10.1016/j.biortech.2016.05.120

11. Microalgae consortia cultivation in dairy wastewater to improve the potential of nutrient removal and biodiesel feedstock production

Author:
Yuan, Zhenhong,   et al.   ; Qin, Lei; Wang, Zhongming; Sun, Yongming; Shu, Qing; Feng, Pingzhong; Zhu, Liandong; Xu, Jin;     Show all 8 Authors
Source:
Environmental science and pollution research international 2016 v.23 no.9 pp. 8379-8387
ISSN:
0944-1344
Subject:
Chlorella; Scenedesmus; biodiesel; biomass production; cell growth; chemical oxygen demand; fatty acid methyl esters; feedstocks; fuel production; lipid content; lipids; microalgae; phosphorus; wastewater; wastewater treatment
Abstract:
... The potential of microalgae consortia used in dairy wastewater treatment combined with microalgae biodiesel feedstock production was evaluated by comparing the nutrient removal of dairy wastewater, the growth of cells, and the lipid content and composition of biomass between monoalgae and microalgae consortia cultivation system. Our results showed that higher chemical oxygen demand (COD) removal ( ...
DOI:
10.1007/s11356-015-6004-3

12. Discovery of genes for production of biofuels through transcriptome sequencing of Dunaliella parva

Author:
Yuan, Zhenhong,   et al.   ; Shang, Changhua; Bi, Guican; Wang, Zhongming; Alam, Mohammad Asraful; Xie, Jun;     Show all 6 Authors
Source:
Algal research 2016 v.13 pp. 318-326
ISSN:
2211-9264
Subject:
Dunaliella; biofuels; biosynthesis; feedstocks; fuel production; gene expression regulation; gene ontology; genes; genetic engineering; lipids; microalgae; nitrogen; nucleotide sequences; starch; transcription (genetics); transcription factors; transcriptomics
Abstract:
... Compared with first generation plant-based biofuels, microalgae have potential advantages as feedstock for biofuel production. However, the genome sequences were insufficient in non-model microalgae with potential for biofuel production, which limited the development of genetic engineering of these microalgae. Here we described the de novo transcriptome sequencing and assembly for the halophilic g ...
DOI:
10.1016/j.algal.2015.12.012

13. Bioflocculation as an innovative harvesting strategy for microalgae

Author:
Yuan, Zhenhong,   et al.   ; Alam, Md. Asraful; Vandamme, Dries; Chun, Wan; Zhao, Xinqing; Foubert, Imogen; Wang, Zhongming; Muylaert, Koenraad;     Show all 8 Authors
Source:
Re/views in environmental science and bio/technology 2016 v.15 no.4 pp. 573-583
ISSN:
1569-1705
Subject:
biofuels; biomass; cost effectiveness; economic feasibility; environmental science; flocculation; fuel production; genetic engineering; harvesting; microalgae
Abstract:
... Microalgae are a promising new source of biomass for the production of third generation biofuels but, so far, the majority of microalgal biomass has been used for high-value applications. New low-cost technologies are needed to make the production and processing of microalgae economically feasible for low-value applications. A major challenge lies in the harvesting of microalgae, which requires a ...
DOI:
10.1007/s11157-016-9408-8

14. Process Analysis of Alkaline Flocculation Harvesting for Chaetoceros muelleri and Scenedesmus quadricauda

Author:
Yuan, Zhenhong,   et al.   ; Huo, Shuhao; Wang, Zhongming; Zhu, Shunni; Cui, Fengjie; Zou, Bin; Wang, Feng; Dong, Renjie; Zhao, Pengxiang;     Show all 9 Authors
Source:
BioEnergy research 2016 v.9 no.2 pp. 682-690
ISSN:
1939-1234
Subject:
Bacillariophyceae; Chaetoceros muelleri; Scenedesmus quadricauda; biomass; calcium hydroxide; calcium phosphates; cell walls; cellulose; crystallization; energy; flocculation; freshwater; harvesting; magnesium hydroxide; microalgae; oils; pH; particle size; saccharification; sterilizing; zeta potential
Abstract:
... Alkaline flocculation could be an attractive microalgae harvesting method, because it is low-cost, low energy consumption, and non-toxic to microalgal cells, and the high pH effectively sterilizes the microalgal biomass as well as the process water. In this paper, the mechanism of alkaline flocculation process and the difference between the two strains marine diatom Chaetoceros muelleri #862 and f ...
DOI:
10.1007/s12155-015-9712-0

15. Characterization of lipid and fatty acids composition of Chlorella zofingiensis in response to nitrogen starvation

Author:
Yuan, Zhenhong,   et al.   ; Zhu, Shunni; Wang, Yajie; Shang, Changhua; Wang, Zhongming; Xu, Jingliang;     Show all 6 Authors
Source:
Journal of bioscience and bioengineering 2015 v.120 no.2 pp. 205-209
ISSN:
1389-1723
Subject:
Chlorella; biodiesel; fatty acid composition; feedstocks; glycolipids; microalgae; nitrogen; nitrogen content; oleic acid; phospholipids; polyunsaturated fatty acids; protein content; starvation; triacylglycerols
Abstract:
... Cellular biochemical composition of the microalga Chlorella zofingiensis was studied under favorable and nitrogen starvation conditions, with special emphasis on lipid classes and fatty acids distribution. When algal cells were grown in nitrogen-free medium (N stress), the increase in the contents of lipid and carbohydrate while a decrease in protein content was detected. Glycolipids were the majo ...
DOI:
10.1016/j.jbiosc.2014.12.018

16. Effect of microalgae supplementation on the silage quality and anaerobic digestion performance of Manyflower silvergrass

Author:
Yuan, Zhenhong,   et al.   ; Li, Lianhua; Sun, Yongming; Kong, Xiaoying; Wao, Yao; Yang, Ligui; Zhang, Yi; Li, Dong;     Show all 8 Authors
Source:
Bioresource technology 2015 v.189 pp. 334-340
ISSN:
0960-8524
Subject:
Enterococcus; Lactobacillus; ammonium nitrogen; anaerobic digestion; bacterial communities; community structure; feed quality; high-throughput nucleotide sequencing; lactic acid; methane; microalgae; pH; silage
Abstract:
... The silage quality of Manyflower silvergrass with microalgae supplementation was investigated, and the variation in bacterial communities during ensilage period was analyzed by high-throughput sequencing technology. In addition, the specific methane yields of the silages were also evaluated. Results showed that the samples with microalgae supplementation have lower pH value and higher lactic acid ...
DOI:
10.1016/j.biortech.2015.04.029

17. Enhanced Accumulation of Carbohydrate and Starch in Chlorella zofingiensis Induced by Nitrogen Starvation

Author:
Yuan, Zhenhong,   et al.   ; Zhu, Shunni; Wang, Yajie; Huang, Wei; Xu, Jin; Wang, Zhongming; Xu, Jingliang;     Show all 7 Authors
Source:
Applied biochemistry and biotechnology 2014 v.174 no.7 pp. 2435-2445
ISSN:
0273-2289
Subject:
Chlorella; bioethanol; biomass; carbohydrate content; ethanol production; feedstocks; hemicellulose; lignin; microalgae; nitrogen; repletion; specific growth rate; starch; starvation
Abstract:
... Though less attention has been paid to microalgae as a feedstock for bioethanol production, many microalgae seem to have this potential since they contain no lignin, minor hemicellulose, and abundant carbohydrate. The objective of this study was to investigate the effect of nitrogen starvation on carbohydrate and starch accumulation in green microalga Chlorella zofingiensis and assess the feasibil ...
DOI:
10.1007/s12010-014-1183-9

18. Metabolic changes of starch and lipid triggered by nitrogen starvation in the microalga Chlorella zofingiensis

Author:
Yuan, Zhenhong,   et al.   ; Zhu, Shunni; Huang, Wei; Xu, Jin; Wang, Zhongming; Xu, Jingliang;     Show all 6 Authors
Source:
Bioresource technology 2014 v.152 pp. 292-298
ISSN:
0960-8524
Subject:
Chlorella; biodiesel; biosynthesis; cell growth; chlorophyll; energy; fuel production; lipids; metabolic studies; microalgae; nitrogen; starch; starvation
Abstract:
... The aim of this research was to study the metabolic changes of starch and lipid biosynthesis in the microalga Chlorella zofingiensis under nitrogen starvation in comparison to nitrogen abundant condition. C. zonfingiensis showed a rapid growth and kept stable chlorophyll content when grown in nitrogen-replete medium, while a severe inhibition of cell growth and a sharp degradation of chlorophyll o ...
DOI:
10.1016/j.biortech.2013.10.092

19. Cultivation of Chlorella vulgaris in Dairy Wastewater Pretreated by UV Irradiation and Sodium Hypochlorite

Author:
Yuan, Zhenhong,   et al.   ; Qin, Lei; Shu, Qing; Wang, Zhongming; Shang, Changhua; Zhu, Shunni; Xu, Jingliang; Li, Rongqing; Zhu, Liandong;     Show all 9 Authors
Source:
Applied biochemistry and biotechnology 2014 v.172 no.2 pp. 1121-1130
ISSN:
0273-2289
Subject:
Chlorella vulgaris; Protozoa; bacteria; biodiesel; biomass; microalgae; recycling; sodium hypochlorite; ultraviolet radiation; wastewater
Abstract:
... There is potential in the utilization of microalgae for the purification of wastewater as well as recycling the resource in the wastewater to produce biodiesel. The large-scale cultivation of microalgae requires pretreatment of the wastewater to eliminate bacteria and protozoa. This procedure is costly and complex. In this study, two methods of pretreatment, UV irradiation, and sodium hypochlorite ...
DOI:
10.1007/s12010-013-0576-5
PubMed:
24142385

20. Nutrient removal and biodiesel production by integration of freshwater algae cultivation with piggery wastewater treatment

Author:
Yuan, Zhenhong,   et al.   ; Zhu, Liandong; Wang, Zhongming; Shu, Qing; Takala, Josu; Hiltunen, Erkki; Feng, Pingzhong;     Show all 7 Authors
Source:
Water research 2013 v.47 pp. 4294-4302
ISSN:
0043-1354
Subject:
Chlorella; biodiesel; biomass; bioreactors; chemical oxygen demand; freshwater; lipid content; microalgae; nutrient content; pollutants; specific growth rate; wastewater; wastewater treatment
Abstract:
... An integrated approach, which combined freshwater microalgae Chlorella zofingiensis cultivation with piggery wastewater treatment, was investigated in the present study. The characteristics of algal growth, lipid and biodiesel production, and nutrient removal were examined by using tubular bubble column photobioreactors to cultivate C. zofingiensis in piggery wastewater with six different concentr ...
DOI:
10.1016/j.watres.2013.05.004
PubMed:
23764580