摘要
开发了一种新型一体化反应器———CIBR,通过维持厌氧、缺氧和好氧的交替运行,实现了单池连续流同步脱氮除磷。在低温(平均水温为12.24℃)状态下设定了6种工况进行脱氮除磷的中试,结果表明,在曝气为2 h、搅拌为2 h、静沉为2 h的工况下CIBR出水COD、NH3-N、TN和TP的平均值分别为29.46、2.86、11.24和0.94 mg/L,满足GB 18918—2002的一级B标准,但当进水TP持续较高(≥4 mg/L)时,需辅助物化处理或后处理方可实现TP的达标排放。综合有机物降解、脱氮除磷及能耗,确定工况2(曝气:2 h,搅拌:1 h,静沉:1 h)为最佳工况。
A new kind of integrated continued-flow intermittent-aeration biological reactor （CIBR） was developed. By maintaining the alternative operation of anaerobic, anoxic and aerobic process, simultaneous nitrogen and phosphorus removals were implemented. Six different modes of nitrogen and phosphorus removals were studied at low temperature （ average water temperature being 12.24 ℃ ）. The results show that under the conditions of aeration, mixing and settling periods being 2 hours each, the average concentrations of COD, NH3 -N, TN and TP in the effluent are 29.46 mg/L, 2.86 mg/L, ll. 24 mg/L and 0.94 mg/L respectively, satisfying the first B-grade discharge standard specified in GB 18918 - 2002. However, when concentration of TP in the influent exceeds 4 mg/L, chemical methods or other post-treatment process need to be applied in order to maintain TP concentration at the discharge standards. Considering the qualitative removals of organics, nitrogen and phosphorus, the efficient consumption of energy and the ratio of aeration, the mode Ⅱ in which the periods of aeration, mixing and settling are 2 h, 1 h, and 1 h respectively is considered optimal.
出处
《中国给水排水》
CAS
CSCD
北大核心
2006年第19期21-24,共4页
China Water & Wastewater
基金
国家高技术研究发展计划(863)项目(2003AA601110)
关键词
污水处理
一体化CIBR反应器
脱氮除磷
低温
municipal sewage treatment
integrated continued-flow intermittent-aeration biological reactor
nitrogen and phosphorus removal
low temperature
