不同发酵方式对污泥厌氧发酵性能的影响及其发酵液利用

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Abstract

In order to study the effect of different fermentation styles on the waste activated sludge (WAS) anaerobic fermentation performance and the utilization of fermentation liquor by microorganism. The WAS were fermented in the Ca(OH)₂(pH=10±0.2),Ca(OH)₂+NaCl(pH=10±0.2), FNA(pH=5.5±0.2), PMS, SDBS and naturally fermentation system, and the fermentation liquor was used to de-nitrification of biology. Different indicators were analyzed respectively such as dissolution of organic matters (SCOD), short chain volatile fatty acids (SCFAs), soluble protein, soluble polysaccharide, key enzyme (hydrolase and coenzyme420) and NO₃^--N. The results showed that the hydrolytic acidification performance and fermented liquid utilization of six fermentation systems had significant difference. The maximal values of SCOD, SCFAs, hydrolase activity and sludge reduction appeared at Ca(OH)₂+NaCl fermentation system, and Ca(OH)₂ fermentation system was followed, but the naturally fermentation system was minimum. Although the protein and polysaccharide was abundant in the FNA fermentation system as same as Ca(OH)₂+NaCl fermentation system, but lower hydrolase and higher F420 activity led to the lower SCFAs accumulation. The de-nitrification tests showed that the fermented liquid from Ca(OH)₂ and Ca(OH)₂+NaCl fermentation systems had a remarkable de-nitrification effect and large of NO₂^--N accumulation which was similar to sodium acetate, but the fermented liquid from FNA, PMS and SDBS fermentation systems could not be well used by microorganism because of large of poisonous substance.

Key words： waste activated sludge anaerobic fermentation hydrolytic acidification fermentation liquor carbon source biological de-nitrification

Received: 25 December 2015

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	IN Bao-dan
	WANG Shu-ying
	XING Li-qun
	PENG Yong-zhen

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IN Bao-dan,WANG Shu-ying,XING Li-qun等. The effect of different fermentation methods on the sludge anaerobic fermentation performance and the utilization of fermentation liquor[J]. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(7): 2079-2089.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2016/V36/I7/2079

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