壳聚糖—海藻酸钠固定化菌小球处理猪场沼液

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Abstract

An immobilized bacteria pellet by embedding method was prepared to remove ammonia from wastewater. The preparation condition was optimized and the effects of immobilized bacteria pellet dosage, solution pH and reaction time on ammonia removal were investigated. The optimal preparation conditions were:chitosan dosage was 20g/L, sodium alginate dosage was 10g/L, target species embedding amount was 2:5 (V/V). For the treatment of the wastewater, after treated by 15g/L of immobilized bacteria pellet for 4h without adjusted the solution pH, 93.9% of ammonia can be removed from the wastewater, in which 64.3% was due to the adsorption and 29.6% was due to the microbial action. After the treatment, numbers of the bacteria in the external and internal immobilized pellets were significantly increased. Furthermore, ammonium adsorption process by the immobilized bacteria pellets could be well fitted to the pseudo-second-order kinetic model (R²=0.9252) and the Langmuir equilibrium model (R²=0.9578).

Key words： immobilized microorganisms pellet chitosan ammonium removal adsorption kinetics adsorption isotherm

Received: 01 December 2018

PACS:

X703.1

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	Articles by authors
	CHEN Cheng
	GUO Jun-yuan
	ZHOU Ming-jie
	JIAN Bi-yu
	WEI Jing
	HE Shan
	XU Jia-jing
	LONG Hong-lin

Cite this article:

CHEN Cheng,GUO Jun-yuan,ZHOU Ming-jie等. Removal of ammonium from aqueous solution by microorganism cells immobilized into chitosan-sodium alginate beads[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(7): 2812-2821.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I7/2812

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