摘要
采用厌氧-缺氧-好氧工艺处理焦化废水,在稳定运行阶段,考察了系统及其各反应段对COD及氨氮的降解情况。结果表明,系统对COD及氨氮的去除率分别为86.7%,97.2%,最终出水COD浓度低于150 mg/L,氨氮浓度低于15 mg/L,达到国家废水排放标准。系统运行稳定时,各段对COD及氨氮的降解能力不同:COD去除率由大到小为缺氧池、好氧池和厌氧池;氨氮去除率由大到小为好氧池、缺氧池和厌氧池,初步探讨了AAO各段运行机理。
Coking wastewater was treated by anaerobic / anoxic / aerobic biological process,the degradation conditions of COD and NH3-N in units of the AAO system and the whole system were investigated in stable operation phase. The results show： the removal rates of COD and NH3-N were 86. 7% and 97. 2%,respectively. The average concentration in effluent for COD and NH3-N were less than 150 mg / L and15 mg / L,respectively,which could meet the national discharge standard. When the system was running normally and stably,the removal rates of COD and NH3-N in units of the system were very different： of COD from big to small in proper order were： anoxic stage,aerobic stage and anaerobic stage,and of NH3-N was as follows： aerobic stage,anoxic stage and anaerobic stage. Finally,the running mechanism in units of the AAO system were primary discussed.
出处
《应用化工》
CAS
CSCD
北大核心
2015年第3期470-472,477,共4页
Applied Chemical Industry
基金
陕西省科技厅项目(2012JZ2003)
榆林学院高层次人才科研启动基金项目(12GK33
12GK35)
关键词
焦化废水
AAO
氨氮
COD
coking waste water
hydrolysis plus anoxic and aerobic
ammonia nitrogen
chemical oxygen demand
