前置反硝化-BAF工艺反硝化池脱氮效能研究  

Study on Nitrogen Removal Efficiency of Denitrifying Filter in Pre-denitrification Biologically Aerated Filter Process

作　　者：李辉耀 韩洪军[3] LI Huiyao;HAN Hongjun(School of Environment and Science,The University of Shiga Prefecture,Shiga 522-8533,Japan;Moutai Institute,Zunyi 564507,China;Arbin Institute of Technology,State Key Laboratory of Urban Water Resources and Environment,Harbin 150090,China)

机构地区：[1]日本滋贺县立大学环境科学系,日本滋贺522-8533 [2]茅台学院,贵州遵义564507 [3]哈尔滨工业大学城市水资源与环境国家重点实验室,黑龙江哈尔滨150090

出　　处：《水处理技术》2019年第12期91-94,共4页Technology of Water Treatment

基　　金：城市水资源与水环境国家重点实验室自主课题（2013DX05）

摘　　要：为进一步提高反硝化(DN)池的反硝化效能,分别考察了进水温度、HRT、C/N以及反洗周期等因素对前置反硝化曝气生物滤池(BAF)组合工艺DN池的脱氮效能的影响。结果表明,反硝化效能会随温度的升高而升高,在25℃时NO3--N去除率为91.3%;水力停留时间对反硝化作用的影响主要原于HRT的减少缩短了反硝化作用的反应时间,从而使反硝化过程中所消耗的COD降低;COD/ρ(NO3--N)小于15时,COD/ρ(NO3--N)是DN池脱氮效能的决定性因素,当COD/ρ(NO3--N)大于15时,NO3--N的含量变化趋于平缓;同一反洗周期内DN池的反硝化效能会持续增加,下一反洗周期开始前NO3--N的质量浓度降低至1.9 mg/L,此时脱氮效能达到最大。In order to increase the denitrification efficiency of the denitrifying(DN) filter, the effects of water temperature, HRT, C/N ratio and the backwashing cycle on denitrification efficiency of DN filter in pre-denitrification biologically aerated filter(BAF) process were investigated. The results showed that,denitrification efficiency increased with the increase of temperature, the NO3--N removal rate was 91.3%when temperature was 25 ℃. The effect of HRT on denitrification was mainly due to the reduction of HRT would shorten the reaction time of denitrification, thus reducing the amount of COD used in the denitrification process. When COD/ρ(NO3--N) was less than 15, COD/ρ(NO3--N) was the determining factor of the denitrification efficiency of DN filter. When COD/ρ(NO3--N) was greater than 15, the content of NO3--N tended to be flat. The denitrification efficiency of the DN filter in the same backwashing cycle continuously increased, and the mass concentration of NO3--N decreased to 1.9 mg/L before the next backwashing cycle, and the denitrification efficiency reached the maximum.

关 键 词：前置反硝化 曝气生物滤池(BAF) 脱氮效能 

分 类 号：X703.1[环境科学与工程—环境工程]