城市污水人工土快滤床运行方式的试验研究

Test of Dosing Regime of Artificial Soil Filter Treating Municipal Wastewater

在北京地区的秋、冬季和成都地区的春、夏季,用模拟人工土柱处理城市污水,研究不同季节人工土快滤床的最佳运行方式。试验结果证明,春、夏季以连续配水8h、干化16h的水力负荷率较高;秋季以连续配水8h、干化40h的水力负荷率较高;冬季以连续配水16h、干化128h的水力负荷率较高。COD、BOD5、SS和TP的去除率和处理出水浓度以连续配水8h、湿干比较大的运行方式较好;而TN则以配水8h、湿干比较小的运行方式较好。

Utilization of simulating artificial soil columns for treatment of municipal wastewater was done in order to study dosing regime of artificial soil biofilter at different seasons. in autumn and winter in city of Beijing and in spring and summer in city of Chengdu, respectively. Experimental results showed that the treatments for wetting 8 hours and drying 16 hours in follow in both spring and summer; the treatments for wetting 8 hours and drying 40 hours in autumn; or the treatments for wetting 16 hours and drying 128 hours in winter, all gained higher hydraulic loading rates. In consideration of concentration of COD, BOD5, SS and TP in the treated effluent and their removal efficiency. The dosing regime of wetting 8 hours and larger ratio of wetting to drying was much better than others, whilst the treatment for wetting 8 hours and smaller ratio of wetting to drying for total nitrogen removal was more attractive than other treatments.