中文摘要：

采用预滤机去除曝气沉砂池水与砂水分离器进水的泥砂，探究预滤机优化传统的污水一级处理工艺的可行性。研究发现，预滤机对曝气沉砂池水中SS的去除率为30．6％，低于砂水分离器对SS的去除率，主要是由于曝气沉砂池中部的水所含泥砂浓度低、粒径较小。预滤机所产泥渣的含水率为70．3％，低于砂水分离器泥渣的含水率。以砂水分离器进水为原水时，预滤机对SS和VSS的去除率分别为52．4％和62．5％，优于砂水分离器的处理效果；过滤泥渣的含水率和VSS含量分别为67．7％和41．5％，均低于砂水分离器所产泥渣（分别为76．1％和77．8％）。预滤机干污泥产率为0．224kg／m3污水，是砂水分离器的1．48倍。预滤机产生的泥渣粒径分布更加均匀，粒径小的泥砂所占比例更高；并且，预滤机对COD也有一定的去除效果。

英文摘要：

The feasibility for optimizing the primary sewage treatment process by the pre-filter was studied by removing the sand in the aerated grit water and the influent of the sand-water separator through the filtration function of the pre-fiher. The results showed that the removal efficiency of SS in aerated grit water by pre-filter was 30.6% , which was lower than that by sand-water separator due to the low sand concentration and small particle size in the middle of aerated grit. The water content of the sludge filtered by the pre-fiher was 70.3 % , which was lower than that in the sand-water separator sludge. When using the influent of the sand-water separator as raw water, the removal efficiencies of SS and VSS by the pre- filter were 52.4% and 62.5% , respectively, which were better than that by sand-water separator. The water content and VSS of the sludge filtered by the pre-fiher were 67.7% and 41.5%, respectively, which were lower than 76.1% and 77.8% achieved by the sand-water separator. The dry sludge yield of the pre-fiher was 0. 224 kg/m3 sewage, which was 1.48 times that of the sand-water separator. The particle size distribution of sludge generated by the pre-filter was more homogeneous while the ratio of the small particle size sludge was higher. Moreover, the pre-filter also had certain removal effect on COD.