摘要
研究了微氧条件下两级膨胀颗粒污泥床反应器对焦化废水的处理。实验结果表明:一、二级反应器的氧化还原电位在0^+15mV和+60^+80mV时系统对COD和NH3-N的去除率均为90%,系统出水COD和NH3-N质量浓度分别为100~150m g/L和20m g/L;在运行过程中未添加碱和碳源的条件下,两级反应器出水硝酸盐氮和亚硝酸盐氮的平均质量浓度分别为5m g/L和144m g/L,说明出水亚硝酸盐积累明显。颗粒污泥微氧条件下的累计产甲烷量比厌氧条件下增加了一倍多。
The treatment of coking wastewater in a two-stage expanded granular sludge bed(EGSB) reactor under micro-aerobic condition was studied.The experimental results show that When the redox potentials of the first and the second reactors are 0-+15 mV and+60-+80 mV,the removal rates of COD and NH3-N are both 90%,and the COD and NH3-N mass concentration of the effluent are 100-150 mg/L and 20 mg/L respectively;Without adding alkali and carbon source during the process,the average mass concentrations of nitrate nitrogen and nitrite nitrogen in the effluent are 5 mg/L and 144 mg/L,which indicate that the accumulation of nitrite nitrogen occurs obviously in the effluent.The cumulative yield of methane by granular sludge doubles under micro-aerobic condition comparing with anaerobic condition.
出处
《化工环保》
CAS
CSCD
北大核心
2010年第3期234-237,共4页
Environmental Protection of Chemical Industry
基金
太原市科技发展计划项目(070332)
关键词
微氧环境
两级膨胀颗粒污泥床反应器
焦化废水
短程硝化反硝化
颗粒污泥
废水处理
micro-aerobic environment
two-stage expanded granular sludge bed reactor(EGSB)
coking wastewater
shortcut nitrification-denitrification
granular sludge
wastewater treatment
