SBR工艺处理晚期垃圾渗滤液的脱氮特性研究  

Characteristics of Nitrogen Removal in SBR for the Mature Landfill Leachate Treatment

作　　者：孙艳波[1] 周少奇[1] 李伙生[1] 冯平[1] 杨志泉[1] 

机构地区：[1]华南理工大学环境科学与工程学院,广州510006

出　　处：《环境科学》2010年第2期357-362,共6页Environmental Science

基　　金："十一五"国家科技支撑计划项目(2008BAE64B05);广州市环境保护局污染防治新技术研究开发项目(2008-3);广州市重大科技项目(2008DLB2080500)

摘　　要：采用有效容积为1200m^3的SBR反应器处理晚期垃圾渗滤液，进行生物脱氮特性研究．结果表明，通过投加粪水调节进水C／N，能显著提高SBR反应器对晚期垃圾渗滤液中氮素污染物的去除效果，其中第112～136d的TN平均去除率高达82．62％，出水TN≤190mg·L^-1，COD≤400mg·L^-1；能在反应器内达到各种生物脱氮反应的平衡状态，BOD，与TN去除量的比值稳定在1．43左右．在稳定平衡阶段，通过对反应器内氮素污染物和SO4^2-的含量变化进行周期跟踪监测，发现在搅拌回流阶段存在NH4^＋—N和SO4^2-的同时等比例去除现象，去除率分别为27．06％和76．17％，反应器内存在同步硝化反硝化和同步脱氮除硫（SO4^2-）过程；量化分析了反应器内各种生物脱氮反应，得到异养反硝化、同步硝化反硝化、同化作用、同步脱氮除硫（SO4^2-）和内源呼吸反硝化对TN去除量的贡献率分别为62．6％、33．8％、7．0％、〉26．1％和2．7％．Characteristics of biological nitrogen removal for the treatment of a mature landfill leaehate with a 1 200 m^3 sequencing batch reactor （SBR） was investigated. The results indicate that obvious enhancement of nitrogen removal in the SBR treating landfill leachate was obtained by adding fecal supernatant to modulate the C/N ratio. The total nitrogen （TN） removal efficiency was found high up to 82.62% during day 112 to day 136, with an effluent of TN≤ 190 mg · L^-1 ,COD≤400 mg · L^-1. An equilibrium state of various nitrogen compounds removal reactions was achieved, and subsequently the ratio of BOD5 to TN maintained approximately at 1.43. In the equilibrium phase, by monitoring the cyclic variations of the nitrogenous compounds and sulphate in the reactor, a simultaneous proportional NH4^＋-N and SO4^2- removal was observed in the agitation and recirculation stage, and up to 27.06% of NH4^＋ -N and 76.17% of SO4^2- removal was found. Simultaneous nitrification and denitrification and simultaneous removal of nitrogen and sulphate were exsited. The quantification of nitrogenous compounds removal reactions in the reactor was also conducted, and the calculation shows that the heterotrophic denitrification, simultaneous nitrification and denitrifieation, assimilation, simultaneous removal of nitrogen and sulphate, and endogenous respiration denitrification which are responsible for the TN removal are 62.6%, 33.8%, 7.0%, 〉26.1% , and 2. 7% respectively.

关 键 词：垃圾渗滤液 序批式反应器 生物脱氮 同步硝化反硝化 同步脱氮除硫(SO4^2-) 量化分析 

分 类 号：X705[环境科学与工程—环境工程]