Issue 17, 2020
From the journal:

RSC Advances

Advanced treatment of coal chemical reverse osmosis concentrate with three-stage MABR

Rukang Liu,abcd   Qin Wang,abcd   Mei Li, ORCID logo abcd   Jun Liu,abcd   Wei Zhang,abcd   Meichao Lan,abcd   Chunyu Du,abcd   Zhiye Sun,abcd   Dong Zhaoabcd  and  Baoan Li ORCID logo *abcd  

* Corresponding authors

a Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, PR China
E-mail: libaoan@tju.edu.cn

b State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300350, PR China

c Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin 300350, PR China

d Qingdao Institute for Ocean Engineering of Tianjin University, Tianjin University, Qingdao 266200, PR China

Abstract

The issue of reverse osmosis concentrate (ROC) has attracted significant attention due to its complex and toxic constituents under high salinity conditions. In this work, a three-stage membrane-aerated biofilm reactor (MABR) system was constructed to treat such wastewater without an external carbon source. The effects of operating conditions including aeration pressure, reflux ratio, temperature and hydraulic retention time on the removal performance of the integrated system were evaluated and optimized. Under the optimal operating parameters, the removal efficiencies of COD, NH4+–N, NO3−–N, and TN reached 69.36%, 80.95%, 54.55%, and 54.36%, respectively. Three-dimensional fluorescence analysis indicated that humic acid was mostly removed from raw water. Moreover, microbial diversity analysis indicated that the microbial community structure of each reactor could be individually modulated to exert different functions and enhance the system performance. The integrated MABR system exhibits great feasibility and potential for the advanced treatment of coal chemical ROC.

Graphical abstract: Advanced treatment of coal chemical reverse osmosis concentrate with three-stage MABR

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Article information

DOI
https://doi.org/10.1039/C9RA10574C
Article type
Paper
Submitted
16 Dec 2019
Accepted
21 Feb 2020
First published
10 Mar 2020
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2020,10, 10178-10187

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Advanced treatment of coal chemical reverse osmosis concentrate with three-stage MABR

R. Liu, Q. Wang, M. Li, J. Liu, W. Zhang, M. Lan, C. Du, Z. Sun, D. Zhao and B. Li, RSC Adv., 2020, 10, 10178 DOI: 10.1039/C9RA10574C

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