TY - JOUR
T1 - Growing Chlorella vulgaris on mixed wastewaters for biodiesel feedstock production and nutrient removal
AU - Deng, Xiangyuan
AU - Gao, Kun
AU - Addy, Min
AU - Chen, Paul
AU - Li, Da
AU - Zhang, Renchuan
AU - Lu, Qian
AU - Ma, Yiwei
AU - Cheng, Yanling
AU - Liu, Yuhuan
AU - Ruan, Roger
N1 - Publisher Copyright:
© 2018 Society of Chemical Industry
PY - 2018/9
Y1 - 2018/9
N2 - BACKGROUND: Large water footprint and nutrients demand are two of the major issues during microalgae cultivation. In this study, anaerobically digested swine manure was mixed with centrate at different minimal dilution multiples (2×, 3×, 4×, 6× and 8×), which was used as media to cultivate Chlorella vulgaris (UTEX 2714) for reducing the production cost of algae cultivation and balancing the nutrient profiles of culture media. RESULTS: Chlorella vulgaris (UTEX 2714) grew well on the mixed wastewaters with a biomass productivity of 132.2 to 440.3 mg L−1 d−1. Nutrients in the mixed wastewaters were removed effectively by this alga, and the removal efficiencies of ammonium (NH4 +-N), total nitrogen (TN), chemical oxygen demand (COD) and total phosphorus (TP) ranged from 98.3, 46.9, 30.2 and 21.8 to 99.3, 71.4, 42.2 and 80.4%, respectively. Additionally, chemical compositions, such as pigments, carbohydrate, protein and lipids, in this alga varied with the change of dilution multiple due to the different nutrient profiles of culture media. Predicted properties of biodiesel from the oils of this alga satisfied the specifications of biodiesel, ASTM D6751-08 and EN 14214 standards. CONCLUSION: Biomass of C. vulgaris (UTEX 2714) can be used as a good-quality feedstock for biodiesel production when grown on mixed wastewaters. This novel integration of using mixed wastewaters to cultivate microalgae would be an effective way to reduce the production cost of algal biomass.
AB - BACKGROUND: Large water footprint and nutrients demand are two of the major issues during microalgae cultivation. In this study, anaerobically digested swine manure was mixed with centrate at different minimal dilution multiples (2×, 3×, 4×, 6× and 8×), which was used as media to cultivate Chlorella vulgaris (UTEX 2714) for reducing the production cost of algae cultivation and balancing the nutrient profiles of culture media. RESULTS: Chlorella vulgaris (UTEX 2714) grew well on the mixed wastewaters with a biomass productivity of 132.2 to 440.3 mg L−1 d−1. Nutrients in the mixed wastewaters were removed effectively by this alga, and the removal efficiencies of ammonium (NH4 +-N), total nitrogen (TN), chemical oxygen demand (COD) and total phosphorus (TP) ranged from 98.3, 46.9, 30.2 and 21.8 to 99.3, 71.4, 42.2 and 80.4%, respectively. Additionally, chemical compositions, such as pigments, carbohydrate, protein and lipids, in this alga varied with the change of dilution multiple due to the different nutrient profiles of culture media. Predicted properties of biodiesel from the oils of this alga satisfied the specifications of biodiesel, ASTM D6751-08 and EN 14214 standards. CONCLUSION: Biomass of C. vulgaris (UTEX 2714) can be used as a good-quality feedstock for biodiesel production when grown on mixed wastewaters. This novel integration of using mixed wastewaters to cultivate microalgae would be an effective way to reduce the production cost of algal biomass.
KW - Chlorella vulgaris
KW - anaerobically digested swine manure
KW - biodiesel properties
KW - centrate
KW - chemical compositions
KW - nutrient removal
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U2 - 10.1002/jctb.5634
DO - 10.1002/jctb.5634
M3 - Article
AN - SCOPUS:85045719444
SN - 0268-2575
VL - 93
SP - 2748
EP - 2757
JO - Journal of Chemical Technology and Biotechnology
JF - Journal of Chemical Technology and Biotechnology
IS - 9
ER -
