[Treatment of oilfield produced water by biological methods-constructed wetland process and degradation characteristics of organic substances].
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.
Huang
Xiang-feng
XF
State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. hxf@tongji.edu.cn
Shen
Jie
J
Wen
Yue
Y
Liu
Jia
J
Lu
Li-jun
LJ
Zhou
Qi
Q
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
D007220:Industrial Waste; D009930:Organic Chemicals; D010578:Petroleum; D014874:Water Pollutants, Chemical