title: Innovative combination of Fe2+-BAF and ozonation for enhancing phosphorus and organic micropollutants removal treating petrochemical secondary effluent.
abstract: Two sets of BAF - ozonation systems, with (System-A) and without (System-B) Fe2+dosing into BAF, were used for organic micropollutants (OMPs) and phosphorus removal in the advanced treatment of petrochemical secondary effluent. Pilot scale study showed that when the influent COD, TP and TSS were 73.0, 1.40 and 24.6mgL-1, the effluent COD, TP and TSS were 48.9, 0.32, 7.78mgL-1for System-A with the ozone and Fe2+dosage of 25mgL-1and 0.08mmolL-1, and 60.2, 1.16, 6.44mgL-1for System-B with the ozone dosage of 25mgL-1. The dosage of Fe2+into the BAF significantly enhanced the TP and OMPs removal ability. Exactly, the residual Fe2+in the BAF-A effluent stimulated the catalytic ozonation in the following ozone unit. Therefore, the OMPs removal in System-A was obviously better than that in System-B. The dosage of Fe2+from 0.02 to 0.10mmolL-1had slight adverse effect on the biofilm activity in BAF. Based on the TP and OMPs removal ability, the System-B is selected as a proposed process for the advanced treatment of petrochemical secondary effluent.
authors: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Research Center of Water Pollution Control Technology, Chinese Research Academy of Environment Sciences, Beijing 100012, China.
authors: Changyong
authors: C
authors: Wu
authors: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Research Center of Water Pollution Control Technology, Chinese Research Academy of Environment Sciences, Beijing 100012, China. Electronic address: zhouyuexi@263.net.
authors: Yuexi
authors: Y
authors: Zhou
authors: Research Center of Water Pollution Control Technology, Chinese Research Academy of Environment Sciences, Beijing 100012, China.
authors: Yi
authors: Y
authors: Wang
authors: Research Center of Water Pollution Control Technology, Chinese Research Academy of Environment Sciences, Beijing 100012, China.
authors: Mingkun
authors: M
authors: Guo
keywords: Biological aerated filter (BAF); Organic micropollutants (OMPs); Ozonation; Petrochemical secondary effluent; Phosphorus