曝气量对颗粒污泥制备生物柴油的影响

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Abstract

Aerobic granular sludge for sugar-containing wastewater treatment is a promising raw material for biodiesel production, which also could reduce the environmental contamination of wastewater discharge and convert excessive granular sludge into valuable resources. In this study, the effect of aeration rate on the biodiesel production from granular sludge was investigated. The results indicated that granules cultivated at different aeration rates had different morphologies and the microbial structures of bacteria and fungi. The biodiesel yield reached the highest level[(48.62 ±1.36)mg/g SS] when the aeration rate was 167L/(min·m³). The aeration rate with 167L/(min·m³) resulted in the dominance of the white filamentous fungi Dipodascus (8.57%) in granular sludge, thereby enhancing the lipid accumulation of granular sludge and changing the biodiesel constituent produced from the sludge. The growth of Dipodascus in granular sludge possibly led to a great increase in linoleic acid (C18:2). Obviously, the biomass and microbial community could be affected by aeration rate which determined the content and constituent of FAMEs produced from granular sludge. The yield and constituent of biodiesel produced from excessive granular sludge could be improved by controlling the aeration conditions of granulation system in actual applications.

Key words： reutilization of excessive sludge biodiesel aeration rate granular sludge microbial structure

Received: 18 July 2017

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	CHI Xia
	LI An-jie
	LI Mei-xi

Cite this article:

CHI Xia,LI An-jie,LI Mei-xi. Effect of aeration rate on granular sludge for biodiesel production[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(2): 651-657.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I2/651

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