Journal
BIORESOURCE TECHNOLOGY
Volume 270, Issue -, Pages 120-128Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.09.011
Keywords
MABR; ROC; DO; Salinity; Microbial community
Funding
- National Natural Science Foundation of China [51478304]
- Ministry of Water Resource [SF-201605]
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Coal chemical reverse osmosis concentrate (ROC), which is characterized by high salinity and high organics, remains as a serious environmental problem. In this study, a lab-scale three-stage membrane-aerated biofilm reactor (MABR) system was designed to treat such a ROC. The effects of influent salinity and operating parameters (pH, DO and HRT) on the treatment efficiency were discussed. The removal efficiencies of COD, NH4-N and TN under the optimal operating parameters reached to 81.01%, 92.31% and 70.72%, respectively. Simultaneous nitrification and denitrification (SND) as well as shortcut nitrogen removal were achieved. The salinity less than 3% did not induce significant decrease in treatment efficiency and microbial communities. Moreover, the dominant phyla in biofilms were Proteobacteria and Bacteroidetes. This work demonstrated MABR had great potential in ROC treatment.
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