The Performance of a Self-Flocculating Microalga Chlorococcum sp GD in Wastewater with Different Ammonia Concentrations
文献类型： 外文期刊
作者： Lv, Junping 1 ; Wang, Xuechun 1 ; Liu, Wei 1 ; Feng, Jia 1 ; Liu, Qi 1 ; Nan, Fangru 1 ; Jiao, Xiaoyan 2 ; Xie, Shulian 1 ;
作者机构： 1.Shanxi Univ, Sch Life Sci, Taiyuan 030006, Peoples R China
2.Shanxi Acad Agr Sci, Inst Agr Environm & Resource, Taiyuan 030031, Shanxi, Peoples R China
关键词： ammonia nitrogen; biomass production; lipid accumulation; wastewater treatment; self-flocculation
期刊名称：INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH （ 影响因子：3.39； 五年影响因子：3.789 ）
ISSN： 1660-4601
年卷期： 2018 年 15 卷 3 期
页码：
收录情况： SCI
摘要： The performance of a self-flocculating microalga Chlorococcum sp. GD on the flocculation, growth, and lipid accumulation in wastewater with different ammonia nitrogen concentrations was investigated. It was revealed that relative high ammonia nitrogen concentration (20-50 mg.L-1) was beneficial to the flocculation of Chlorococcum sp. GD, and the highest flocculating efficiency was up to 84.4%. It was also found that the highest flocculating efficiency occurred in the middle of the culture (4-5 days) regardless of initial ammonia concentration in wastewater. It was speculated that high flocculating efficiency was likely related to the production of extracellular proteins. 20 mg.L-1 of ammonia was found to be a preferred concentration for both biomass production and lipid accumulation. 92.8% COD, 98.8% ammonia, and 69.4% phosphorus were removed when Chlorococcum sp. GD was cultivated in wastewater with 20 mg.L-1 ammonia. The novelty and significance of the investigation was the integration of flocculation, biomass production, wastewater treatment, and lipid accumulation, simultaneously, which made Chlorococcum sp. GD a potential candidate for wastewater treatment and biodiesel production if harvested in wastewater with suitable ammonia nitrogen concentration.
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