固定化微藻流化床反应器去除低碳污水中氨氮的潜力

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Abstract

A fluidized bed reactor was designed to enhance the removal efficiency of ammonium (NH₄⁺-N) by immobilized microalgae. Influences of different operating conditions of this system on NH₄⁺-N removal efficiency were investigated systematically, including microalgae species, sewage up-flow velocity, photo period and light intensity. Results indicated that a highest NH₄⁺-N removal (96.7%) efficiency was achieved by employing immobilized Scenedesmus obliquus at 6.8m/h influence velocity, 8:16h L/D photoperiod and 4800Lux light intensity. Based on these optimum operation conditions, ammonium removal potential of microalgae was studied at 200mg/L COD. Results showed that NH₄⁺-N removal rate is higher than 95% when the initial NH₄⁺-N concentration is no higher than 50mg/L. A semi-continuous methodology for microalgae fluidized bed reactor was established, which significantly reduced the dependence of microalgae on organic carbon source in the process of biological assimilation. The study provides a theoretical guidance for the design of microalgae fluidized bed technology, which could be used to improve the NH₄⁺-N removal potential from low carbon wastewater.

Key words： immobilization Scenedesmus obliquus fluidized bed ammonium low carbon wastewater

Received: 24 September 2019

PACS:

X703

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	YANG Mei-juan
	LIU Xiang
	WANG Kai-jun
	MA Jin-yuan

Cite this article:

YANG Mei-juan,LIU Xiang,WANG Kai-jun等. The potential of immobilized microalgae fluidized bed reactor for removing ammonium from low carbon wastewater[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(5): 2040-2046.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I5/2040

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