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小城镇污水具有水量较小,水质不稳定,可生化性好等特点。文章以张家港市塘桥片区污水处理厂设计为例,研究了改良型A~2/O污水处理工艺在小城镇污水处理厂中的适用性,并计算了关键技术参数。改良型A~2/O工艺处理污水的效果良好,出水水质达到《国家城镇污水处理厂污染物排放标准》(GB18918-2002)1A要求。研究结果可为5万m~3/d以下规模的中小型污水处理厂的工艺选择和运行方面提供理论指导及技术参考。
Small town sewage has a small amount of water, water quality instability, biodegradability and so on. Taking the design of Zhangqiao Port Tangqiao Wastewater Treatment Plant as an example, the article studies the applicability of the modified A ~ 2 / O wastewater treatment process in the small town sewage treatment plant and calculates the key technical parameters. The improved A ~ 2 / O process has a good effect on sewage treatment, and the effluent quality meets the requirement of “National Emission Standard of Pollutants for Municipal Wastewater Treatment Plant” (GB18918-2002) 1A. The results of this study can provide theoretical guidance and technical reference for the process selection and operation of small and medium-sized WWTPs below 50,000 m 3 / d.