产甲烷反硝化-短程硝化反硝化组合工艺处理屠宰废水的效能  

Performance of a Combined Simultaneous Methanogenesis and Denitrification(SMD)-Shortcut Nitrification and Denitrification Process in Slaughterhouse Processing Wastewater Treatment

作　　者：刘玉浩[1] 彭绪亚[1] 何清明[1] 李蕾[1] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆大学,重庆400044

出　　处：《农业环境科学学报》2013年第9期1876-1885,共10页Journal of Agro-Environment Science

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07104-002-04);重庆市科技重大专项(CSTC2008AB7135)

摘　　要：采用CSTR作为产甲烷反硝化反应器和MSBR作为短程硝化反硝化反应器的串联工艺进行屠宰废水处理中试试验。通过控制溶解氧在0.7~1.2 mg·L-1,实现短程硝化反硝化;将MSBR出水按一定比例回流至CSTR,实现产甲烷反硝化。在稳定运行的前提下考察了组合工艺对屠宰废水的处理效果,并进一步分析了各反应器对COD、TN、NH+4-N的去除贡献。结果表明:工艺对屠宰废水COD、NH+4-N、TN的去除率分别达到97.12%、95.13%、77.14%;CSTR对系统COD去除贡献率为68.35%,MSBR对系统TN去除贡献率为72.34%;CSTR对系统TN、NH+4-N去除的贡献率分别为27.66%、-33.42%,MSBR对系统COD、NH+4-N去除的贡献率分别为31.65%、133.42%;组合工艺的适宜回流比较为75%;温度对COD、NH+4-N、TN的去除效果及去除稳定性有重要的影响;在最佳回流比75%的条件下,沼气中甲烷含量为66.70%;在气温较高的夏秋季,稳定期的亚硝酸盐积累率(NAR)可达65%以上。In a pilot-scale trial, a continuous stirred tank reactor（CSTR） combined with a modified sequencing batch reactor（MSBR） was used for slaughterhouse wastewater treatment.The CSTR was used as a simultaneous methanogenesis and denitrification（SMD） reactor,as well as the MSBR was used as a shortcut nitrification and denitrification reactor. In the natural temperature condition,by controlling the dis- solved oxygen at 0.7-1.2 rag＂ L-1, shortcut nitrification was achieved. Partial MSBR effluent was refluxed to the CSTR in different stages to accomplish SMD. Under steady operation conditions, the effects of the combined process for slaughterhouse wastewater treatment were in- vestigated. Furthermore, the contributions of CSTR and MSBR in the combined process for COD,NH2-N,TN removal were analyzed. The COD, NH^-N,TN removal efficiencies were 97.12%,95.13%,77.14% respectively. The contribution of CSTR on COD removal was 68.35% and the contribution of MSBR on TN removal was 72.34%. The contribution of CSTR in TN and NH^-N removal were 27.66% and -33.42% respectively. The contribution of MSBR on COD and NH4-N removal were 31.65% and 133.42% respectively. The suitable reflux ratio of the combined process was 75%;The COD, NH2-N and TN removal efficiencies and reactor stability were significantly influenced by temper- ature. The percentage of methane achieved 66.70% in the composition of biogas under the 75% reflux ratio condition. The nitrite accumula- tion rate （NAR） was above 65%.

关 键 词：屠宰废水 产甲烷反硝化 短程硝化反硝化 组合工艺 脱氮 

分 类 号：X703.1[环境科学与工程—环境工程]