己烯雌酚降解菌固定化条件优化及其降解性能

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Abstract

Diethylstilbestrol (DES)-degrading bacteria S (Serratia sp.) was immobilized using sodium alginate as the embedding agent. The optimum immobilization conditions, determined through orthogonal test, were as follows: 4% sodium alginate, bacteria: sodium alginate 1:2, 4% CaCl₂ and 6h crosslinking time. The DES degradation performance of immobilized strain S was apparently superior to that of free strain. The degradation ratio of DES by immobilized strain S was 83.84%, which was 22.84% higher than that by free strain S under laboratory culture conditions. The optimum inoculation of immobilized strain S was 300g/L, and the optimum initial DES concentration was 20~40mg/L. Three water samples were collected from sewage outfalls with DES concentrations of 40.01, 37.90 and 33.52μg/L, respectively. Immobilized strain S was added to these water samples, and 90.0%, 96.0% and 96.7% of DES were removed by immobilized strain S after 7d. Results of this investigation provide a new available technique for estrogen removal from polluted water systems.

Key words： estrogen diethylstilbestrol immobilization degradation sewage

Received: 16 November 2015

PACS:

X703.5

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	Articles by authors
	LING Wan-ting
	XU Ran-fang
	LIU Juan
	SUN Min-xia
	LI Shun-yao
	ZHU Xue-zhu
	GAO Yan-zheng

Cite this article:

LING Wan-ting,XU Ran-fang,LIU Juan等. Immobilization and degradation performance of diethylstilbestrol-degrading bacteria S (Serratia sp.)[J]. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(5): 1514-1519.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2016/V36/I5/1514

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