Abstract: A slow-release aeration biomembrane made from fiber media unit was used to dispose benzene, toluene, ethylbenzene, and xylene (BTEX) pollution in the river caused by accidental release from a chemical plant.The slow-release aeration biomembrane system was developed to treat wastewater containing BTEX effectively, when the bioreacter was inoculated with co-culture of pure microorganism and recycled with a medium content of BTEX. The biomembrane system showed good performance after 30 days of start-up period. At a high BTEX concentration in the river, the fiber media unit could effect adsorption treatment due to its tremendous specific surface. When the original BTEX concentration was 50—100 mg/L, it could drop to below 5 mg/L after 24 h of disposal. When the BTEX concentration was low in the water, the microbe in the slowly-released aeration biomembrane could effect biodegredation. When the initial BTEX concentration in the water was between 0.5—1.5 mg/L , the removal rate of BTEX could reach above 90% after 15 days of disposal.

摘要： 报道了采用纤维填料单元，组成缓释曝气生物膜放置于水中进行处置，以应对流域水资源的安全危机。缓释曝气生物膜系统可有效地处理含苯、甲苯、乙苯和二甲苯（BTEX）的污水，在反应器启动时采用纯菌种接种，加BTEX在液相中进行循环挂膜，经30天的运行，然后通入BTEX混合液，生物膜系统表现出良好的去除BTEX的能力。水中BTEX浓度较高时，利用填料单元的巨大单位比表面积，可对BTEX进行以吸附为主的处置。水中的BTEX浓度在50～10 mg/L 时，经24 h，水中BTEX可降至5 mg/L以下。BTEX浓度较低时，利用缓释曝气生物膜中的微生物对其进行生物降解； BTEX浓度在0.5～1.5 mg/L时，经15天运行，BTEX的去除率达90%以上。