Optimization of the proportions of four wastewaters in a blend for the cultivation of microalgae using a mixture design

被引:28
|
作者
Moreno-Garcia, L. [1 ]
Gariepy, Y. [1 ]
Bourdeau, N. [2 ]
Barnabe, S. [2 ]
Raghavan, G. S. V. [1 ]
机构
[1] McGill Univ, Fac Agr & Environm Sci, Bioresource Engn Dept, 21111 Chemin Lakeshore, Montreal, PQ H9X 3V9, Canada
[2] Univ Quebec Trois Rivieres, Acad Sci & Engn, Dept Chem Biochem & Phys, 3351 Blvd Forges, Trois Rivieres, PQ G9A 5H7, Canada
关键词
Microalgae; Wastewaters; Mixture design; Leachate; Ammonia; Digestate; Organic carbon; WASTE-WATER; ANAEROBIC-DIGESTION; BACTERIA CONSORTIUM; CHLORELLA-VULGARIS; BIOMASS PRODUCTION; LANDFILL LEACHATE; LIPID PRODUCTION; TOXICITY; REMOVAL; ALGAE;
D O I
10.1016/j.biortech.2019.03.067
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
A 2nd degree mixture design was used to determine the optimal blend prepared from four wastewater streams to produce microalgae-based biomass. The streams consisted of a liquid digestate from an anaerobic digestion process, a landfill leachate, a septic-system sludge treatment plant liquid, and a wastewater treatment plant effluent. The mixture regression analysis indicated that blends with higher proportions of treated effluent and digestate improved cells growth, while the use of leachate was detrimental to the growth. The global solution of the mixture optimization predicted a maximum value of biomass productivity of 22.76 mg L-1 d(-1), in a blend consisting of 19% treated effluent, 21% digestate, and 60% water. Proportions of leachate higher than 13.33% were detrimental to the growth. The concentration of ammonia-N in the blends ranged from 0.39 to 150 mg L-1 d(-1), and its toxicity effect on the cells diminished with increasing amounts of organic carbon in the cultivation medium.
引用
收藏
页码:168 / 173
页数:6
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