摘要
采用A2/O2生物膜工艺处理焦化废水,分别考察了厌氧(A1)、缺氧(A2)、一级好氧(O1)和二级好氧(O2)反应器对污染物的去除效果。在A1、A2、O1和O2反应器的HRT分别为15.5、15、12、12 h,水温为20~30℃,pH值为7.0~9.5,回流比为3.0的条件下,各反应器对COD的平均去除率分别为31.0%、27.6%、48.1%和8.2%;在A1中NH3-N浓度增加了25.2%,A2、O1、O2反应器对NH3-N的平均去除率分别为6.2%、46.7%和76.7%;系统出水COD、NH3-N的平均浓度分别为227、11.5 mg/L,对COD、NH3-N的平均去除率分别为87.2%、94.1%。
The A^2/O^2 biofilm process was used to treat coke plant wastewater, and the removal ef- ficiencies of pollutants by anaerobic reactor A1 , anoxic reactor A2 , one-stage aerobic reactor O1 and two- stage aerobic reactor O2 were investigated respectively. When HRT of Al , A2, O1 and O2 reactors is 15.5 h, 15 h, 12 h and 12 h respectively, the water temperature is 20 to 30 ℃ , pH is 7.0 to 9.5 and the re- flux ratio is 3.0, the average removal rate of COD in the reactors is 31.0% , 27.6% , 48.1% and 8.2% respectively. The increment of ammonia nitrogen is 25.2% in A1 reactor, and the average removal rates of ammonia nitrogen in other reactors are 6.2% , 46.7% and 76.7% respectively. The average concen- trations of COD and ammonia nitrogen in the system effluent are 227 mg/L and 11.5 mg/L respectively, and the average removal rates of COD and ammonia nitrogen are 87.2% and 94.1% respectively.
出处
《中国给水排水》
CAS
CSCD
北大核心
2009年第21期5-7,12,共4页
China Water & Wastewater
关键词
A2/O2工艺
生物膜反应器
厌氧
焦化废水
A^2／O^2 process
biofilm reactor
anaerobic treatment
coke plant wastewater
