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Biodiesel production from algae cultivated in winter with artificial wastewater through pH regulation by acetic acid
Zhu, Liandong1,2; Hiltunen, Erkki1,2; Shu, Qing3; Zhou, Weizheng3; Li, Zhaohua4; Wang, Zhongming3
2014-09-01
Source PublicationAPPLIED ENERGY
Volume128Pages:103-110
AbstractAlgae have been considered as a promising biodiesel feedstock. One of the major factors affecting large-scale algae technology application is poor wintering cultivation performance. In this study, an integrated approach is investigated combining freshwater microalgae Chlorella zofingiensis wintering cultivation in pilot-scale photobioreactors with artificial wastewater treatment. Mixotrophic culture with the addition of acetic acid (pH-regulation group) and autotrophic culture (control group) were designed, and the characteristics of algal growth, lipid and biodiesel production, and nitrogen and phosphate removal were examined. The results showed that, by using acetic acid three times per day to regulate pH at between 6.8 and 7.2, the total nitrogen (TN) and total phosphate (TP) removal could be increased from 45.2% to 73.5% and from 92.2% to 100%, respectively. Higher biomass productivity of 66.94 mg L-1 day(-1) with specific growth rate of 0.260 day(-1) was achieved in the pH-regulation group. The lipid content was much higher when using acetic acid to regulate pH, and the relative lipid productivity reached 37.48 mg L-1 day(-1), The biodiesel yield in the pH-regulated group was 19.44% of dry weight, with 16-18 carbons as the most abundant composition for fatty acid methyl esters. The findings of the study prove that pH adjustment using acetic acid is efficient in cultivating C zofingiensis in wastewater in winter for biodiesel production and nutrient reduction. (C) 2014 Elsevier Ltd. All rights reserved.
SubtypeArticle
KeywordChlorella Zofingiensis Pilot Scale Biodiesel Ph Regulation Artificial Wastewater Net Energy Ratio
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.apenergy.2014.04.039
WOS Subject ExtendedEnergy & Fuels ; Engineering
WOS KeywordCHLORELLA-ZOFINGIENSIS ; BIOFUEL PRODUCTION ; NUTRIENT REMOVAL ; TECHNOECONOMIC ASSESSMENT ; SPIRULINA-PLATENSIS ; BIOMASS PRODUCTION ; FATTY-ACIDS ; MICROALGAE ; PHOTOBIOREACTORS ; PYRENOIDOSA
Indexed BySCI
Language英语
WOS SubjectEnergy & Fuels ; Engineering, Chemical
WOS IDWOS:000337776500010
Citation statistics
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10776
Collection中国科学院广州能源研究所
Affiliation1.Univ Vaasa, Fac Technol, FI-65101 Vaasa, Finland
2.Vaasa Energy Inst, FI-65101 Vaasa, Finland
3.Chinese Acad Sci, Key Lab Renewable Energy & Gas Hydrate, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
4.Hubei Univ, Fac Resources & Environm, Wuhan 430062, Peoples R China
Recommended Citation
GB/T 7714
Zhu, Liandong,Hiltunen, Erkki,Shu, Qing,et al. Biodiesel production from algae cultivated in winter with artificial wastewater through pH regulation by acetic acid[J]. APPLIED ENERGY,2014,128:103-110.
APA Zhu, Liandong,Hiltunen, Erkki,Shu, Qing,Zhou, Weizheng,Li, Zhaohua,&Wang, Zhongming.(2014).Biodiesel production from algae cultivated in winter with artificial wastewater through pH regulation by acetic acid.APPLIED ENERGY,128,103-110.
MLA Zhu, Liandong,et al."Biodiesel production from algae cultivated in winter with artificial wastewater through pH regulation by acetic acid".APPLIED ENERGY 128(2014):103-110.
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