自充氧层叠生物滤床在农村生活污水处理中的应用研究

Research on application of self-oxygenation laminated biological filter bed in rural domestic sewage treatment

本文对国内外常用的农村生活污水处理技术和浙江省农村生活污水处理现状进行分析,基于传统生物滤床技术,提出了以"层叠生物滤床"为核心工艺的全新结构设计,研发了自充氧通风系统,并开展工程应用处理浙西平原地区苕溪流域的农村生活污水。工程采用两套不同水生植物配置的平行系统开展试验。研究结果表明,两套系统对于CODCr、NH+4-N和TN的去除效果良好,均能达到相应的设计标准,且系统a的植物多样性配置优于系统b,层叠结构设计和自充氧通风系统均提升了两套系统的脱氮效果;但其对TP的去除效果均不佳,初步分析其关键点在于滤床填料的选择和滤床内污泥的不断累积,进而明确了进一步研究的方向。

This article analyzes the common domestic and foreign rural domestic sewage treatment technology and the current situation of rural domestic sewage treatment in Zhejiang Province.Based on the traditional biological filter bed technology, a new structural design with "laminated biological filter bed" as the core process is proposed, and the self-oxygenation ventilation system is developed, and the engineering application is carried out to treat the rural domestic sewage in the Tiaoxi River Basin in the Western Zhejiang Plain.The project uses two parallel systems with different configurations of aquatic plants to carry out the experiment.The research results show that the two systems have good removal effects on CODCr,NH+4-N and TN,and both can reach the corresponding design standards, and the plant diversity configuration of system a is better than that of system b, laminated structure design and self oxygenation ventilation system both have improved the denitrification effect of the two systems;but their removal effect on TP is not good.The key point of preliminary analysis is the selection of filter bed filler and the continuous accumulation of sludge in the filter bed, which clarifies the direction of further research.