HRT对CO2-MBfR去除高SO42-废水中NO3--N的影响

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Abstract

Due to the difficulty of NO₃^--N removal during treatment of high-sulfate (SO₄^2-) actual industrial wastewater (AIW) treatment, we tested the effects of hydraulic retention time (HRT) on treatment performance of simulated wastewater and AIW using CO₂-hydrogen based membrane biofilm reactor (CO₂-MBfR). Results show that the effluent concentrations of NO₃^--N from two kinds of wastewater gradually increased with decreased HRT, and the removal efficiency of NO₃^--N and electron flux distribution ratio (EFDR) in simulated wastewater treatment were better than that of in AIW treatment, but the electron flux distribution pattern was nearly the same:the EFDR of NO₃^--N and SO₄^2- were 90.09%~97.49% and 2.51%~9.91%, respectively. Overall, our results reveal that CO₂-MBfR could high efficiently remove NO₃^--N of AIW. From a practical perspective, HRT higher than 10.4h is suggested for achieving the total nitrogen emission standard of 15mg/L in the actual wastewater treatment.

Key words： carbon dioxide-hydrogen based membrane biofilm reactor (CO₂-MBfR) actual industrial wastewater hydraulic retention time (HRT) NO₃^--N SO₄^2-

Received: 12 February 2018

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	Articles by authors
	RAN Ya-jun
	YANG Xiao-xiao
	WANG Zuo-wei
	WU Cheng-yang
	ZHOU Yun
	XIA Si-qing

Cite this article:

RAN Ya-jun,YANG Xiao-xiao,WANG Zuo-wei等. Effects of HRT on the removal of NO₃^--N from high SO₄^2- wastewater using CO₂-MBfR[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(9): 3322-3327.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I9/3322

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