工业区雨洪强化净化与调蓄水水质保持技术中试研究

Purification,Storage and Water Quality Maintenance of Initial Rainwater in Industrial Park

针对目前工业区高污染负荷雨源型河道具有的径流量小、污染负荷高、非雨季缺乏新鲜水水源补充的特点,研发了工业区雨洪强化净化与调蓄水水质保持技术,并建立了一套规模为20 m3/h的中试装置。雨季时对初期雨水进行净化处理,非雨季时维持水质,并对河道进行生态补水。在降雨时期,雨洪强化净化中试系统对COD、NH3-N、TN、TP、SS的去除率分别为84. 90%～92. 96%、29. 05%～68. 82%、35. 68%～59. 12%、55. 75%～67. 18%、89. 74%～93. 31%,出水除总磷外,其他指标可达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级B标准。在非降雨时期,调蓄水水质保持系统对COD、NH3-N、TN、TP、SS的去除率分别为14. 13%～31. 99%、33. 64%～77. 42%、24. 72%～48. 04%、61. 29%～67. 20%、45. 44%～76. 90%,出水水质可达到一级A标准。

For the rain source river of industrial park with small runoff and high pollution load, lacking of fresh water supplement in dry season, a purification and storage process of initial rainwater was developed. The scale of pilot plant was 20 m3/h. During the rainy season, the initial rainwater was puri- fied and storaged. The effluent quality was maintained for river water supplement during the dry season. The research showed that the initial rainwater purification system had a significant removal rate of COD, NH3 -N, TN, TP and SS in rainy season, which reached 84.90% -92.96%, 29.05% -68.82%, 35.68% -59. 12%, 55.75% -67.18% and 89.74% -93.31%, respectively. The effluent quality met the first class B criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treat- ment Plant （GB 18918 -2002） except TP. While during dry season, a removal rate of 14. 13% - 31.99% , 33.64% - 77.42% , 24.72% - 48.04% , 61.29% - 67.20% and 45.44% - 76.90% was maintained in rainwater storage system, whose effluent met the requirement of first class A standard.