摘要
采用缺氧/厌氧/微氧/好氧生物工艺处理15 000 m3/d氮肥化工企业废水,对不额外投加碳源条件下的运行效能进行了分析.COD、氨氮和总氮污泥负荷分别为0.02～0.07 kg-COD/（kgMLSS·d）、0.01 ～ 0.04 kgNH3-N/（kgMLSS·d）和0.02～0.05 kgTN/（kgMLSS·d）,其去除率基本稳定在65％、90％和56％以上,出水水质满足国家和地方标准限值要求.控制微氧池DO为0.6 mg/L、pH值为7.8,亚硝酸盐积累率达到48％,将混合液回流比提高至150％,处理系统具有短程硝化反硝化运行特征.能耗检测和分析表明,该工艺吨水和COD比能耗分别达到0.43kW·h/m3和1.51 kW·h/kg,氨氮和总氮比能耗分别为3.43 kW·h/kg和2.94 kW·h/kg,可实现低能耗生物脱氮运行.
The anoxic/anaerobic/microaerobic/aerobic process （A2/O2 process） was applied to treat 15 000 m3/d wastewater from nitrogenous fertilizer production.The operational efficiency without extra addition of carbon source was investigated.The sludge loads of COD,NH3-N and TN for A2/O2 process were 0.02 to 0.07 kgCOD/（kgMLSS · d）,0.01 to 0.04 kgNH3-N/（kgMLSS· d） and 0.02 to 0.05 kgTN/（kgMLSS · d） respectively.Under this condition,the removal rates of COD,NH3-N and TN were above 65％,90％ and 56％ respectively,and the effluent quality could meet the requirements of the national and local standard limits.Through controlling DO （about 0.6 mg/L） and pH （about 7.8）,the nitrite accumulation rate in the microaerobic tank was 48％.After the mixed liquor reflux from microaerobic tank to anaerobic tank was increased to 150％,the A2/O2 process achieved shortcut nitrification and denitrification.The specific energy consumptions of per ton wastewater,COD,NH3 -N and TN were 0.43 kW · h/m3,1.51 kW · h/kg,3.43 kW · h/kg and 2.94 kW · h/kg respectively.
出处
《中国给水排水》
CAS
CSCD
北大核心
2013年第24期78-82,共5页
China Water & Wastewater
基金
河南省重点科技攻关项目(082102350004)
河南省重大公益性科研项目(081100910300)
关键词
氮肥生产废水
A2
O2工艺
脱氮
污泥负荷
短程硝化反硝化
能耗分析
运行效能
nitrogenous fertilizer production wastewater
A2/O2 process
nitrogen removal
sludge load
short-cut nitrification and denitrification
energy consumption analysis
operational efficiency
