Optimization of A2/O—MBR Integrated Process for High Standard of Reclaimed Water Quality in Beijing, China

DOI

10.2991/icseee-15.2016.206How to use a DOI?

Keywords

Wastewater reclamation; A2/O process; Membrane bioreactor (MBR); Reclaimed water quality; Local standard of Beijing

Abstract

The effectiveness of A2/O—MBR integrated process has been studied for domestic wastewater reclamation to meet the latest Beijing pollutant emission standards. Experimental results showed that high DO concentrations in the aerobic tank improved CODCr, NH3-N, and TP removals, whereas the TN removal increased initially and then decreased. Increasing the internal reflux ratio promoted the removal of TN, howbeit negligibly affected the removals of CODCr, NH3-N, and TP. The removals of CODCr, NH3-N, and TN rose with HRT, but the extent of rising became limited as HRT larger than 9 h. Membrane fouling rate increased with running time, and accelerated by improving membrane flux. When the system parameters are set at optimized conditions, i.e. the DO concentration of 2.0 mg/L, the internal reflux ratio of 250%, HRT of 9 h, and ozonation for 20 min, the major water quality of outlet remains stable and meets Grade A of Beijing local standards for new wastewater treatment plant (DB 11890-2012).

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Hao Wang
AU  - Ning Ma
AU  - Maosheng Ye
AU  - Cao Liu
AU  - Qingyi Meng
AU  - Qijun Li
PY  - 2016/04
DA  - 2016/04
TI  - Optimization of A2/O—MBR Integrated Process for High Standard of Reclaimed Water Quality in Beijing, China
BT  - Proceedings of the 2015 4th International Conference on Sustainable Energy and Environmental Engineering
PB  - Atlantis Press
SP  - 1158
EP  - 1164
SN  - 2352-5401
UR  - https://doi.org/10.2991/icseee-15.2016.206
DO  - 10.2991/icseee-15.2016.206
ID  - Wang2016/04
ER  -