内回流混合液DO对缺氧池反硝化影响预测模型研究  

Forecast Model for Impact of Dissolved Oxygen in Internal Reflux Mixture on Denitrification in Anoxic Tank

作　　者：李家驹[1] 孙永利[1,2] 秦松岩[1] 李鹏峰[2] 隋克俭[2] 周蕾[2] 郭亚琼[2] 

机构地区：[1]天津理工大学环境科学与安全工程学院,天津300384 [2]中国市政工程华北设计研究总院有限公司,天津300381

出　　处：《中国给水排水》2016年第21期119-121,共3页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2014ZX07305001-003)

摘　　要：污水处理厂内回流混合液所携带的DO进入缺氧池将直接影响缺氧池脱氮效果。采用动态模拟试验的方法,对前期研究提出的"内回流混合液挟氧对缺氧池反硝化脱氮影响理论预测模型"中影响系数k值进行研究。结果表明,在内回流比为100%、200%、300%的情况下,内回流混合液DO导致系统TN去除量的降低值分别为(1.84±0.08)、(3.72±0.20)、(5.84±0.32)mg/L,据此计算模型中影响系数k值分别为(1.12±0.05)、(1.21±0.06)、(1.29±0.07);将水力停留时间由1 h调整为2 h,k值变化不显著。Dissolved oxygen in internal reflux mixture may directly affect the nitrogen removal effi- ciency in anoxic tank in WWTP. The dynamic simulation experiment method was used to study the value k namely an influence coefficient in the mathematical model used for predicting the impact of dissolved oxygen in internal reflux mixture on denitrification in anoxic tank. The results showed that the removal rates of TN were reduced by （ 1.84 ± 0.08 ） rag/L, （3.72 ± 0.20） mg/L and （5.84±0.32 ） mg/L when the internal reflux ratios were 100% , 200% and 300%, respectively. Hereby, the value k was 1.12 ±0.05, 1.21 ±0.06 and 1.29 ±0.07, respectively. The change of value k was not significant when the hydraulic retention time was adjusted from 1 h to 2 h.

关 键 词：内回流混合液 溶解氧 缺氧池 反硝化 预测模型 影响系数 

分 类 号：X703[环境科学与工程—环境工程]