低负荷运行时内回流比对A^(2)O工艺脱氮的影响  

Effect of Internal Reflux Ratio on Nitrogen Removal in A^(2)O Process under Low Load Operation

作　　者：赵俊娜 ZHAO Jun-na(Cangzhou Water Supply and Drainage Group Co.Ltd.,Cangzhou 061000,China)

机构地区：[1]沧州市供水排水集团有限公司,河北沧州061000

出　　处：《中国给水排水》2022年第5期81-83,共3页China Water & Wastewater

基　　金：沧州市重点研发计划指导项目(192107003)。

摘　　要：考察了低负荷运行情况下,内回流比对A^(2)O工艺脱氮效果及碳源投量的影响。结果表明,内回流比由400%降至200%时,缺氧池出水NO_(3)^(-)-N浓度由5 mg/L降至2 mg/L左右,该过程大约需要6 h。相比于内回流比为400%,内回流比为200%时,在碳源投量相同的条件下,总氮去除率提高22.4%;在好氧池出水NO_(3)^(-)-N浓度相同的条件下,碳源投量节约13.8%。The effects of internal reflux ratio on nitrogen removal efficiency and carbon source dosage of A^(2)O process under low load operation were investigated.When the internal reflux ratio was reduced from 400%to 200%,NO_(3)^(-)-N in the effluent of anoxic tank decreased from 5 mg/L to approximately 2 mg/L,and the process lasted for about 6 hours.Under the same carbon source dosage,compared with internal reflux ratio of 400%,the total nitrogen removal efficiency increased by 22.4%when the internal reflux ratio was 200%.The carbon source dosage could be saved by 13.8% when the same NO_(3)^(-)-N in the effluent of the aerobic tank was maintained.

关 键 词：低负荷运行 内回流比 A^(2)O 碳源 脱氮 

分 类 号：TU992[建筑科学—市政工程]