前置反硝化-高负荷地下渗滤系统深度脱氮研究  

Study on Advanced Nitrogen Removal by High Hydraulic Loading Subsurface Infiltration System with Pre-denitrification

作　　者：张春瑾 杨永强[1] 张玲玲 张权 吴世军[1] 陈繁荣[1] ZHANG Chunjin;YANG Yongqiang;ZHANG Lingling;ZHANG Quan;WU Shijun;CHEN Fanrong(CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院矿物学与成矿学重点实验室广东省矿物物理与材料研究开发重点实验室中国科学院广州地球化学研究所,广东广州510640 [2]中国科学院大学,北京100049

出　　处：《水处理技术》2018年第10期89-93,共5页Technology of Water Treatment

基　　金：广东省科技计划项目(2017B020236003);广州市科技计划项目(201604020017);中国科学院广州地球化学研究所"一三五"规划项目(135PY201604)

摘　　要：针对高负荷地下渗滤系统TN去除率低的问题,研究将渗滤出水回流与原污水混合,进入前置反硝化单元。结果表明,当回流体积比分别为0.5:1、1:1和2:1时,系统对NH_4^+-N的去除率高于92%,且出水NH_4^+-N的质量浓度低于0.5 mg/L;前置反硝化单元对NO_3^--N去除率分别为91.0%、83.0%和64.2%,而系统对TN去除率仅为18.6%、31.2%和30.8%。在回流体积比为2:1时,将原污水COD/ρ(TN)调为6,以与常规生活污水C/N相同,此时反硝化单元的NO_3^--N去除率升至95.2%,而系统TN去除率升至57.1%,且出水TN的质量浓度低于15 mg/L。因此,如果采用该组合工艺处理常规生活污水(COD/ρ(TN)大于6),可使其最终出水TN和NH_4^+-N含量达到更严格的排放标准。Aimed at promoting the total nitrogen removal of high hydraulic loading subsurface infiltration system（HLS）,the pre-denitrification device was employed to treat the HLS effluent mixed with raw sewage.The results showed that the removal rates of NH_4~＋-N were over 92%and the mass concentration of NH_4~＋-N in effluent was lower than 0.5 mg/L no matter the reflux volume ratios were 0.5：1,1：1 and 2：1,while the NO_3^--N removal rates were 91.0%,83.0%,and 64.2%respectively in the pre-denitrification device,and the TN removal rates were only 18.6%,31.2%,and 30.8%respectively in the combined system.The COD/ρ（TN）of the raw sewage was adjusted to 6 same as the ordinary sewage when the reflux volume ratio was set at 2：1,the removal rate of NO_3^--N in pre-denitrification device was increased to 95.2%and TN in the whole system was increased to 57.1%,and the mass concentration of TN in effluent was less than 15 mg/L.Therefore,the TN and NO_3^--N content of treated effluent from the combined system could meet the stricter discharge standard when it was applied to treat the sewage with higher COD/ρ（TN）（≥6）.

关 键 词：高负荷 地下渗滤系统 前置反硝化 回流比 碳氮比 

分 类 号：X703.1[环境科学与工程—环境工程]