高MLSS条件下A^2／O工艺处理低碳城市污水的研究  

Enhanced treatment of low carbon-to nitrogen ratio domestic wastewater using a continuous anaerobic-anoxic-aerobic(A^2/O) process at high MLSS condition

作　　者：贾涛[1,2] 王天竹[2,3] 周康[2,3] 王洪宁[2,3] 郭树君[2,4] 邵德武 边德军[2] 王艺[2,3] 朱遂一[2,3] 

机构地区：[1]河北省环境地质勘查院,河北邢台050022 [2]东北师范大学环境学院,吉林省城市污水处理与水质保障工程研究中心,吉林长春130117 [3]中国市政工程东北设计研究总院有限公司,吉林长春130024 [4]中石油吉林石化公司109污水处理厂,吉林吉林132022

出　　处：《东北师大学报（自然科学版）》2017年第2期163-168,共6页Journal of Northeast Normal University(Natural Science Edition)

基　　金：国家水体污染控制与治理科技重大专项项目(2014ZX07201-011-004-2);国家自然科学基金资助项目(51578118,51478096,51508079);吉林省自然科学基金资助项目(20150101072JC)

摘　　要：对比研究了常规与高MLSS(混合液悬浮固体浓度)条件下,A^2/O(厌氧—缺氧—好氧)工艺对低碳城市污水中有机物的去除效率和脱氮、除磷的效率.结果表明:常规MLSS条件下,由于废水中碳源不足影响了缺氧段的反硝化效率,导致部分时段出水总氮质量浓度超标.提高A^2/O工艺的MLSS达到(5 000±500)mg/L,有机物去除效果基本不变,但出水总氮质量浓度明显下降(均值达到9.5mg/L),且好氧段硝化效果轻微增强.但受高MLSS条件下污泥龄长导致污泥产量低的影响,除磷效果下降,出水总氮升高.继续降低好氧段DO(溶解氧)浓度,并不会影响高MLSS条件下A^2/O工艺的硝化和反硝化效果.The effect of high MLSS on the removal of organic matter, the denitrification and the dephosphorization were studied by using a continuous A^2/O process for the treatment of low carbon-to nitrogen domestic wastewater. The results show that the lack of carbon resource in anoxic zone running at normal MLSS obviously affected the denitrification efficiency and the TN of effluent exceeded the discharge standard. When the MLSS reached （5000 A-500）mg/L in A^2/O process, the average of TN in effluent was low to 9. 5 mg/L and the denitrification efficiency was significantly promoted although the removal of organic matter was similar to that at normal MLSS process. The biological nitrification in aerobic zone was also improved to acquire a lower ammonia nitrogen concentration in effluent. However,a slightly increase in TP concentration was found in the effluent because high MLSS increased the active sludge age to benefit the proliferation of the bacteria which has longer generation period and then reduced the sludge production. Moreover, a lower DO concentration of（1.3±0. 5）mg/L in aerobic zone did not have any effect on the nitrification and denitrification of A^2/O process running at a high MLSS.

关 键 词：A^2/O 活性污泥 脱氮 除磷 城市污水 

分 类 号：X703.1[环境科学与工程—环境工程]