薯渣缓释碳源强化反硝化滤池生物脱氮效果  

Enhancement of Denitrification Effect of Denitrifying Biological Filter by Potato Pulp Sustained-release Carbon Source

作　　者：严子春 杨明霞[2] 高建军 YAN Zichun;YANG Mingxia;GAO Jianjun(Key Laboratory of Yellow River Water Environment in Gansu Province,Lanzhou 730070,China;School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]甘肃省黄河水环境重点实验室,甘肃兰州730070 [2]兰州交通大学环境与市政工程学院,甘肃兰州730070

出　　处：《环境科学与技术》2022年第8期46-52,共7页Environmental Science & Technology

基　　金：甘肃省科技计划(20JR2RA0002);国家自然科学基金(51568034)。

摘　　要：为解决城市污水深度处理碳源不足导致脱氮效果不佳的问题,该文制备了具有缓慢释碳功能的薯渣固体缓释碳源SCPR。释碳试验与强化反硝化生物滤池(DNBF)脱氮试验表明,SCPR最大有机物释放量为129.87 mg/(L·g),碳源释放过程满足二级动力学,在水力负荷为0.1 m^(3)/(m^(2)·h)、SCPR与陶粒配比为1∶6、进水NO_(3)^(-)-N平均浓度为50.09 mg/L时,DNBF中NO_(3)^(-)-N、NO_(2)^(-)-N与TN去除率分别为75.53%、86.21%与74.98%,出水COD平均浓度为25.24 mg/L,SCPR作用下DNBF反硝化反应级数介于零级与一级之间。SCPR具有良好的释碳与强化DNBF脱氮效果的能力,可作为污水深度脱氮处理的碳源。To solve the problem of low nitrogen removal efficiency due to insufficient carbon source for advanced treatment of municipal wastewater,a sustained-release carbon source SCPR with slow-releasing of organic matter was prepared.Carbon release and enhanced denitrifying biological filter(DNBF)denitrification test showed that the maximum amount of organic matter released from SCPR was 129.87 mg/(L·g),and the carbon-releasing process follows second-order kinetic equation.When the hydraulic load was 0.1 m^(3)/(m^(2)·h),the ratio of SCPR to ceramsite was 1∶6,and the average concentration of NO_(3)^(-)-N in the influent was 50.09 mg/L,the removal rates of NO_(3)^(-)-N,NO_(2)^(-)-N and TN in DNBF were 75.53%,86.21%and 74.98%,respectively,and the average concentration of COD in effluent was 25.24 mg/L.The kinetic reaction order of DNBF denitrification is between zero and first order under the action of SCPR.The sustained-carbon source of SCPR had a high release of organic matter and enhance the denitrification effect of DNBF,so it can be used as a carbon source for advanced denitrification treatment of wastewater.

关 键 词：薯渣缓释碳源 释碳性能 强化脱氮 动力学 

分 类 号：X703[环境科学与工程—环境工程]