摘要
针对我国中小城镇污水低C/N值的水质特点,考察了双泥法SBR工艺的脱氮除磷效果。结果表明:硝化反应器采用生物膜SBR并控制溶解氧为1.0mg/L进行连续曝气,可以实现短程硝化反硝化;在厌氧/缺氧反应器中,聚磷菌能同时利用硝酸盐和亚硝酸盐为电子受体进行反硝化除磷,从而降低了对有机碳源和溶解氧的需求以及能耗。小试系统对模拟城镇污水中COD、TN、TP的平均去除率分别为94.9%、81.2%、89.5%,出水水质达到了《城镇污水处理厂污染物排放标准》(GB18918—2002)的一级A标准。
Aimed at low carbon/nitrogen ratio of the wastewater in middle and small towns of China, the efficiency of nitrogen and phosphorus removal in a lab scale two-sludge sequencing batch reactor （SBR） system was investigated. The results show that shortcut nitrification-denitrification can be achieved in a biofilm SBR by controlling dissolved oxygen （DO） concentration around 1.0 mg/L during continuous aeration. Both nitrate and nitrite are used as alternative electron receptors for denitrifying phosphorus removal by phosphorus-accumulating organisms （PAOs） in an anaerobic/anoxic SBR. Therefore, the potential demand of organic carbon and DO in the system is decreased along with energy consumption saving. The average removal rates of COD, TN and TP in the simulated municipal wastewater are 94.9% , 81.2% and 89.5% respectively. The effluent quality can meet the first level A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant GB 18918 - 2002）.
出处
《中国给水排水》
CAS
CSCD
北大核心
2010年第13期11-14,共4页
China Water & Wastewater
基金
国家水体污染控制与治理科技重大专项(2008ZX07315-003-02)
重庆市科技攻关项目(CSTC
2008AB7133)
关键词
双污泥系统
生物膜SBR
短程硝化反硝化
反硝化除磷
亚硝酸盐累积率
two-sludge system
biofilm SBR
shortcut nitrification-denitrification
denitrif- ying phosphorus removal
nitrite accumulation rate
