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慢滤池去除污水中邻苯二甲酸二(2-乙基己基)酯的效能

Keywords: 环境激素,邻苯二甲酸二(2-乙基己基)酯,污水回用,深度处理

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Abstract:

将慢滤池用于污水二级出水的深度处理,并利用小试装置研究了慢滤池去除邻苯二甲酸二(2-乙基己基)酯(DEHP)的效能。慢滤池采用粒径为0.4~0.6mm,厚度为800mm的石英砂做滤料并以0.1m/h的恒定滤速运行。实验结果表明,慢滤池出水浊度、COD和色度远低于现行《城市污水再生利用城市杂用水水质标准》(GB/T18920-2002)的相应数值。污水二级处理出水中DEHP浓度为6.1~62.8μg/L时,经过慢滤池过滤后,DEHP浓度降为1.7~7.3μg/L。当接纳282.8μg/L的DEHP冲击负荷时,慢滤池出水DEHP仍能低于10μg/L。实验证明,慢滤池内的生物膜吸附过滤和生物降解共同保证了慢滤池去除DEHP的良好性能。

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