Performance evaluation of microalgae for concomitant wastewater bioremediation, CO2 biofixation and lipid biosynthesis for biodiesel application

被引:177
作者
Nayak, Manoranjan [1 ]
Karemore, Ankush [1 ]
Sen, Ramkrishna [1 ]
机构
[1] Indian Inst Technol, Dept Biotechnol, Kharagpur 721302, W Bengal, India
来源
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS | 2016年 / 16卷
关键词
Microalgal biomass; Domestic wastewater; Nutrient removal; CO2; fixation; Lipid; Fatty acid; BIOFUELS PRODUCTION; CARBON-DIOXIDE; BIOMASS; PRODUCTIVITY; REMOVAL; CULTURE; SYSTEMS; GROWTH; ALGAE; GAS;
D O I
10.1016/j.algal.2016.03.020
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
This study was directed towards evaluating the potential of microalgae for simultaneous wastewater treatment, CO2 biofixation and lipid biosynthesis for biofuel application. The cultivation potential of various microalgal species in domestic wastewater (DWW) was studied in shake-flasks. The microalga, Scenedesmus sp. showed superior results in terms of the maximum specific growth rate of 0.44 d(-1), biomass yield of 0.43 g L-1, biomass productivity of 61.4 mg L-1 d(-1) and total lipid content of 23.1%. Subsequently, the performance evaluation of Scenedesmus sp. with respect to biomass growth, lipid accumulation, CO2 biofixation rate and nutrient uptake was carried out at different CO2 concentrations in a photobioreactor. The culture supplemented with 2.5% (v/v) CO2 was found most suitable and resulted in highest biomass productivity, total lipid content, lipid productivity, and CO2 consumption rate of 196 mg L-1 d(-1), 33.3%, 65.17 mg L-1 d(-1) and 368 mg L-1 d(-1), respectively. The microalga could bioremediate ammonium, nitrate, phosphate and chemical oxygen demand (COD) efficiently from the wastewater to the extent of 70-98%. The FAME composition of the microalgal lipid was found encouraging for biodiesel application as saturated: unsaturated fatty acid ratio was favorable to about 1.2:1. The study indicates that Scenedesmus sp. can efficiently utilize DWW for its growth instead of using synthetic culture medium and can produce a significant amount of biomass at 2.5% CO2 for biofuel application. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码:216 / 223
页数:8
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