Surface flow constructed wetland for heavy oil-produced water treatment.
Heavy oil-produced water from China' Liaohe Oilfield was purified in a surface flow constructed wetland (SFCW) during a 3-yr field experiment. Treatment showed high mean removal efficiencies of 80%, 93%, 88% and 86% for COD, oil, BOD and TKN, respectively for reed bed #1 and 71%, 92%, 77%, and 81% for COD, oil, BOD and TKN, respectively for reed bed #2. The results also showed that in the third year of the system's operation, the oil-produced water had mainly positive impacts on the reed's health parameters. Thus, reed can be used as a feasible wetland macrophyte for treating such wastewater, and this SFCW system can operate for a long time.
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Department of Environmental Engineering, Peking University, Beijing 100871, PR China. jiguodong@sina.com
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D010578:Petroleum / Q000032:analysis*; D013997:Time Factors; D014874:Water Pollutants, Chemical; D014877:Water Pollution, Chemical / Q000517:prevention & control; D018508:Water Purification / Q000379:methods*; D053833:Wetlands
D010578:Petroleum; D014874:Water Pollutants, Chemical