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在保加利亚东北部的Tulenovo油田 ,用人工建造的沼泽地来处理含原油和有害重金属 (镉、铜、铅、锰和铁 )的水。水的pH值 5 3～ 6 8,含 2～ 10mg/l石油 ,重金属浓度超过农业和 /或工业用水相关允许标准的 2～ 8倍。污水流速约 0 1～0 5l/min。沼泽地覆盖面积约 2 0 0m2 ,深约 35～ 40cm。沼泽地中含丰富的水生和陆生植物 ,及不同种类的微生物。沼泽地中的主要植物种类为阔叶香蒲、窄叶香蒲、芦苇、水葱、灯心草类和不同的藻类。微生物包含不同的异养微生物和自养微生物 ,其中包括不同的石油降解细菌和真菌。经沼泽地处理后 ,水中原油含量低于 0 2mg/l,重金属含量低于相关允许标准 ,原油的去除与当地生长微生物的降解有关 ,重金属的去除主要与细菌异化使硫酸盐还原和生物吸附有关
In the Tulenovo field in northeastern Bulgaria, artificially constructed marshes are used to treat water containing crude oil and harmful heavy metals (cadmium, copper, lead, manganese and iron). Water has a pH of 53 to 68, containing 2 to 10 mg / l of petroleum, and the concentration of heavy metals exceeds 2 to 8 times the allowable standard for agricultural and / or industrial water. Sewage flow rate of about 0 1 ~ 0 5l / min. Marsh covers an area of about 200m2, deep about 35 ~ 40cm. Marshlands are rich in aquatic and terrestrial plants, and different types of microorganisms. The main plant species in the wetlands are broad-leaved cattail, narrow-leaf cattail, reed, water onion, rushes and different algae. Micro-organisms contain different heterotrophic and autotrophic microorganisms, including different petroleum-degrading bacteria and fungi. After the treatment of wetlands, the crude oil content in the water is less than 0 2mg / l, the content of heavy metals is lower than the allowable standard, and the removal of crude oil is related to the degradation of local growth microorganisms. The removal of heavy metals is mainly related to bacterial dissimilation and sulfate reduction and biosorption