title: [Treatment of oilfield produced water by biological methods-constructed wetland process and degradation characteristics of organic substances].
abstract: Hydrolysis acidification-aerobic-constructed wetland process and hydrolysis acidification-constructed wetland were used to treat oilfield produced water after the pretreatment of oil separation-coagulation. Gas chromatography-mass spectrometry was used to study the degradation characteristics of organic substances during the treatment process. The results showed that COD and ammonia nitrogen of both the two process effluents were below 80 mg/L and 15 mg/L, respectively, when HRT was 20 h for hydrolysis acidification, 10 h for aeration and 2 d for constructed wetlands or when HRT was 20 h for hydrolysis acidification and 4 d for constructed wetland. The results of GC-MS analysis showed that biodegradability of the oil produced water was significantly improved in hydrolysis acidification. Substantial removal of benzene compounds was achieved in aerobic and constructed wetland.
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. hxf@tongji.edu.cn
authors.forename: Xiang-feng
authors.initials: XF
authors.lastname: Huang
authors.forename: Jie
authors.initials: J
authors.lastname: Shen
authors.forename: Yue
authors.initials: Y
authors.lastname: Wen
authors.forename: Jia
authors.initials: J
authors.lastname: Liu
authors.forename: Li-jun
authors.initials: LJ
authors.lastname: Lu
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhou
mesh_terms: D001673:Biodegradation, Environmental; D019149:Bioreactors; D007220:Industrial Waste / Q000032:analysis / Q000517:prevention & control; D009930:Organic Chemicals / Q000032:analysis / Q000378:metabolism; D010578:Petroleum / Q000032:analysis* / Q000378:metabolism; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism*; D018508:Water Purification / Q000379:methods; D053833:Wetlands
chemical_list: D007220:Industrial Waste; D009930:Organic Chemicals; D010578:Petroleum; D014874:Water Pollutants, Chemical