化学需氧量/总氮（COD/TN）比值对新型上流式微氧污泥反应器处理无粪猪场废水脱氮效果及生物机制的影响
The effect and biological mechanism of COD/TN ratio on nitrogen removal in a novel upflow microaerobic sludge reactor treating manure-free piggery wastewater.
作者信息
Li Jianzheng, Meng Jia, Li Jiuling, Wang Cheng, Deng Kaiwen, Sun Kai, Buelna Gerardo
机构信息
State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, PR China.
State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, PR China.
出版信息
Bioresour Technol. 2016 Jun;209:360-8. doi: 10.1016/j.biortech.2016.03.008. Epub 2016 Mar 5.
A novel upflow microaerobic sludge reactor (UMSR) was constructed to treat manure-free piggery wastewater with high NH4(+)-N concentration and low COD/TN ratio, and the effect and biological mechanism of COD/TN ratio on nitrogen removal were investigated at a constant hydraulic retention time of 8h and 35°C. The results showed that the UMSR could treat the wastewater with a better synchronous removal of COD, NH4(+)-N and TN. The microaerobic UMSR allowed nitrifiers, and heterotrophic and autotrophic denitrifiers to thrive in the flocs, revealing a multiple nitrogen removal mechanism in the reactor. Both the nitrifiers and denitrifiers would be restricted by an influent COD/TN ratio more than 0.82, resulting in a decrease of TN removal in the UMSR. To get a TN removal over 80% with a TN load removal above 0.86kg/(m(3)·d) in the UMSR, the influent COD/TN ratio should be less than 0.70.
构建了一种新型上流式微氧污泥反应器（UMSR），用于处理无粪便且NH4(+) - N浓度高、COD/TN比值低的猪场废水，并在水力停留时间为8小时、温度为35°C的恒定条件下，研究了COD/TN比值对氮去除的影响及生物学机制。结果表明，UMSR能够较好地同步去除废水中的COD、NH4(+) - N和TN。微氧UMSR使硝化菌以及异养和自养反硝化菌在絮体中大量繁殖，揭示了该反应器中的多种氮去除机制。当进水COD/TN比值大于0.82时，硝化菌和反硝化菌都会受到限制，导致UMSR中TN去除率下降。为使UMSR中TN去除率超过80%且TN负荷去除率高于0.86kg/(m(3)·d)，进水COD/TN比值应小于0.70。
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