反硝化深床滤池在实际工程中的优化研究

Optimization Study of Denitrification Deep Bed Filter in Actual Engineering

反硝化深床滤池是一种深床滤池系统,能够同步去除TN(总氮)、SS(悬浮物)和TP(总磷)等污染物,滤料通常采用特殊形状和规格的石英砂,生长在石英砂上的反硝化优势菌种通过生物作用去除TN(总氮),深层滤池能够过滤去除SS(悬浮物),同时通过投加PAC药剂实现TP(总磷)的去除。本文解析了反硝化深床滤池在实际深度处理工程中溶解氧过高、碳源和除磷药剂投加不精准、反洗和驱氮频次过密或过疏等问题,基于低浓度进水特性,研究对比优化其运行参数,旨在为其深度处理实际应用中提供借鉴。

Denitrification filter has been widely used in the upgrading and transformation of municipal sewage treatment plants.Denitrification deep bed filter is a deep bed filter system,which can synchronously remove TN(total nitrogen),SS(suspended solids)and TP(total phosphorus)and other pollutants.The filter material usually uses special shape and specification of quartz sand where denitrification dominant bacteria grows on through biological action to remove TN(total nitrogen).Depth filter can remove SS(suspended solids),while by adding PAC agents to achieve TP(total phosphorus)removal.This paper analyzed the problems of excessive dissolved oxygen,inaccurate dosing of carbon source and phosphorus removal agent,and over-dense or over-loose frequency of backwashing and nitrogen repellent in the actual advanced treatment of denitrification deep-bed filter.The operating parameters were studied and compared and optimized based on the characteristics of low-concentration influent water,aiming to provide reference for its practical application of advanced treatment.