摘要
为了解前置反硝化曝气生物滤池(BAF)的启动规律,构建了小试规模的前置反硝化BAF,采用快速排泥、逐步增大水力负荷的策略考察了其启动过程中的污染物去除情况及启动特性。结果表明,在好氧柱水力负荷为2.04 m3/(m2·h),厌氧柱水力负荷为4.08 m3/(m2·h),回流比为100%,气水比为5.6∶1的情况下,前置反硝化BAF的启动需要49 d。启动过程中好氧池中硝化细菌的成熟是启动的关键。厌氧池中的反硝化细菌的成熟标志着启动的完成。启动完成后,前置反硝化BAF的出水COD、NH3-N及NO-3-N分别稳定在50、15和5 mg/L以下,满足国家一级A排放标准。
In order to understand the start-up of pre-denitrification biological aerated filter,a lab-scale predenitrification BAF was built and rapid sludge draining method with gradually increasing hydraulic load start-up strategy was adopted to examine the contaminants removal efficiencies and start-up characteristics. The results showed that it took 49 days to start-up the pre-denitrificaiton BAF under the operation condition of 2. 04 m3/(m2·h)of the aerobic column hydraulic load and 4. 08 m3/(m2·h) of anaerobic column hydraulic load,100% of reflux ratio and 5. 6∶ 1 of gas-water ratio. The maturation of nitrifying bacteria in aerobic tank was the key of the start-up of pre-denitrification BAF. The maturation of denitrifying bacteria in anaerobic tank was the indication of the accomplishment of the start-up. After start-up,COD,NH3-N and NO-3-N in the effluent were respectively lower than 50 mg /L,15 mg /L,5 mg /L,which met the GB18918-2002 1A discharged standard.
出处
《环境工程学报》
CAS
CSCD
北大核心
2014年第11期4701-4706,共6页
Chinese Journal of Environmental Engineering
基金
黑龙江省自然科学基金资助项目(E200818)
广东省教育部产学研结合项目(2012B091000029)
黑龙江省政府博士后基金资助项目
关键词
前置反硝化
曝气生物滤池
挂膜
启动
脱氮
pre-denitrification
biological aerated filter(BAF)
biofilm formation
start-up
nitrogen removal
