摘要
为寻求北方寒冷季节污水生物处理系统出水达标率下降的控制对策,分别在23和14℃下启动运行了A2/O污水处理系统,对其运行特征和污染物去除性能进行了比较分析。结果表明,温度下降不仅会降低污水生物处理系统的效能,而且对启动过程也有显著影响。在相同条件下,23℃水温的A2/O系统启动更快,其对COD、NH3-N和TP的去除率分别为89.5%、94.7%和96.3%,出水浓度均能达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级A标准。在14℃下,A2/O系统出水的COD和TP浓度仍可满足GB 18918—2002的一级A标准要求,但NH3-N浓度在8.7 mg/L左右,不能满足一级A标准,对于北方寒冷季节A2/O污水处理系统的运行管理,应重点关注对NH3-N氧化能力的调控。
To develop countermeasures for low quality effluent from wastewater biological treatment systems in cold northern weather, the start-up, operation and pollutants removal performance of two anaerobie-anoxie-aerobie （A^2/O） systems were assessed at temperatures of 23℃ and 14℃. The results showed that low temperature could reduce sewage treatment efficiency and slow down the start-up process. The A^2/O system operated at temperature of 23℃ started up more rapidly, the removal rates of COD, NH3 - N and TP were 89.5%, 94.7% and 96.3%, respectively. Their effluent concentrations could meet the first level A criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant （GB 18918 -2002）. For the A^2/O system operated at temperature of 14℃, the effluent COD and TP could also meet this standard, except that the effluent NH3 - N was about 8.7 mg/L. In the future, the regulation and control of A2/O sewage treatment process in cold northern weather should focus on the enhancement of ammonia oxidization.
出处
《中国给水排水》
CAS
CSCD
北大核心
2014年第1期61-65,共5页
China Water & Wastewater
基金
国家水体污染控制与治理科技重大专项(2013ZX07201-007)
黑龙江省教育厅科学技术研究项目(12511059)
黑龙江省青年科学基金资助项目(QC2009C92)
关键词
生活污水
A^2
O艺
温度
启动
处理效能
domestic sewage
A^2/O process
temperature
start-up
treatment efficiency
