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Bioresour Technol. 2014 Aug;166:72-8. doi: 10.1016/j.biortech.2014.05.026. Epub 2014 May 20.

Influence of carrier filling ratio on the performance of moving bed biofilm reactor in treating coking wastewater.

Author information

1
School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China. Electronic address: guqiyuan1984@gmail.com.
2
School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China. Electronic address: suntc@ces.ustb.edu.cn.
3
Basic Research Service, Ministry of Science and Technology of the People's Republic of China, Beijing 100862, China. Electronic address: wugen0991@gmail.com.
4
School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China. Electronic address: mingyue11.17@qq.com.
5
State Key Laboratory of Urban Water Resources and Environment, Harbin Institute of Technology, Harbin 150090, China; School of Municipal & Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China. Electronic address: qiuweihit@126.com.

Abstract

This study aims to evaluate the effect of carrier filling ratio on the performance of a moving bed biofilm reactor in degrading chemical oxygen demand, phenol, thiocyanate, and ammonia from coking wastewater at 20h of hydraulic retention time. The operational experiments under different carrier filling ratios ranging from 20% to 60% were investigated. The maximum removal efficiency of 89%, 99% and 99% for COD, phenol and thiocyanate, and minimum sensitivity to the increasing contaminants concentration in the influent were achieved at 50% carrier filling ratio. The Haldane competitive substrate inhibition kinetics model was used to describe the relationship between the oxygen uptake rate of ammonium oxidizers and the concentration of free ammonium. The highest biofilm microbial community functional diversity (Shannon's diversity index, H') and evenness (Shannon's evenness index, E') were obtained at 50% carrier filling ratio in all runs using a Biolog ECO microplate.

KEYWORDS:

Carrier filling ratio; Coking wastewater; Microorganism activity; Moving bed biofilm reactor

PMID:
24907566
DOI:
10.1016/j.biortech.2014.05.026
[Indexed for MEDLINE]

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