微生物絮凝剂及与壳聚糖复配处理亚甲基蓝废水

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Abstract

A bioflocculant was produced from slaughter wastewater, and the performances in methylene blue wastewater treatment were investigated by using the bioflocculant alone or combined with chitosan. Furthermore, response surface methodology (RSM) was employed to optimize the treatment process by the composite of this bioflocculant and chitosan. Results showed that the optimal culture conditions for bioflocculant production were 2g urea, 2g glucose, 2g K₂HPO₄, and 1g KH₂PO₄ dissolved in 1L slaughter wastewater. The corresponding bioflocculant yield reached 2.92g/L after fermentation for 60h at 35℃ and 150r/min. For the methylene blue wastewater with a concentration of 20mg/L, when the bioflocculant was adjusted to 15mg/L and the solution pH was 7, removal efficiency of methylene blue reached 64.9%. Optimal conditions for methylene blue removal by the composite of bioflocculant and chitosan were bioflocculant dose of 12.9mg/L, chitosan dose of 0.07g/L, and pH=6. Under this optimal condition, removal efficiency of methylene blue appeared as 94.7%, indicated that it is a feasible way to significantly promoted methylene blue wastewater treatment by using the composite of bioflocculant and chitosan, and the effluent quality was meeting to the 1A discharge standard of the discharge standard of pollutants for municipal wastewater treatment plant (GB 18918-2002).

Key words： methylene blue chitosan slaughter wastewater bioflocculant response surface methodology (RSM)

Received: 06 March 2017

PACS:

X703

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	Articles by authors
	GUO Jun-yuan
	CHEN Cheng
	LIU Wen-jie

Cite this article:

GUO Jun-yuan,CHEN Cheng,LIU Wen-jie. A bioflocculant and its performances in treatment of methylene blue wastewater by composited with chitosan[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(9): 3346-3352.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2017/V37/I9/3346

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