新型分层生物滴滤池去除污水中氮磷的性能研究

生物滴滤池是农村生活污水处理的主要技术之一，但其存在氮、磷去除能力有限，稳定性不高等缺点。为提高新型分层生物滴滤池的氮磷去除效率，探索最佳工艺条件，本文采用新型分层生物滴滤池为试验装置，考察了滤料种类、水力负荷、回流比等对装置去除污水中氮磷性能的影响。结果表明，当滤料为炉渣、水力负荷为4 m3＆#183;m-2＆#183;d-1、回流比为2：1时滤池去除氮磷的效果最好，对NH4＋-N、TN、TP、COD的平均去除率分别可达到87.08%、57.37%、66.04%、80.78%；采用较高的回流比是滴滤池提高脱氮效果的一条有效途径。

Nitrogen and Phosphorus Removal Performance in the Novel Multi-Layered Biological Tricking Filter

Biological trickling filter is one of the main rural sewage treatment technology, but it still has the shortcomings such as lower re-moval efficiency for nitrogen and phosphorus or lower stability. In order to improve the nitrogen and phosphorus removal efficiency of the de-vice and find out its optimum technological conditions, the study took the novel multi-layered biological tricking filter as the device to test the contribution of filter medium, hydraulic loading, recirculation ratio on the treatment of nitrogen and phosphorus removal . The results showed that when the hydraulic loading of 4 m3＆#183;m-2＆#183;d-1, the recirculation ratio rate of 2：1 and slag as filter medium were applied, the best effect could be achieved in the filter. The highest mean efficiency of NH4＋-N, TN, TP and COD were 87.08%, 57.37%, 66.04%and 80.78%, respectively. The results also indicated that higher recirculation ratio was one of effective paths to improve nitrogen removal efficiency.