摘要
在生产规模的活性污泥法(AS)+膜生物反应器(MBR)系统中,进行了黑水处理研究。结果表明,当DO的质量浓度为3.5~4.0 mg/L时,系统TN去除率仅为76.1%,好氧区无SND现象;而当DO的质量浓度降低至0.6~0.75 mg/L时,系统TN去除率升高至90.6%,好氧区同步硝化反硝化TN去除率(η(SNDTN))可达56.1%。当内回流体积比由3降低至2时,TN去除率从90.2%降低至83.7%,SND效果变化不大;而当内回流体积比增加至5时,TN去除率进一步降低至82.8%。随着好氧区MLSS的质量浓度从(9.0±0.3)g/L降低至(6.0±0.3)g/L,SND效率显著降低的同时系统脱氮性能变差,η(SNDTN)由58.8%降低至8.1%,而TN去除率从88.8%下降至76.0%。
Black water treatment was studied in the plant-scale activated sludge-membrane bioreactor (AS-MBR) system. The results showed that when mass concentration of DO was 3.5-4.0 mg/L, the TN removal efficiency was only 76.1% and SND was hardly observed in the aerobic reactors. When the mass concentration of DO was gradually reduced to 0.6-0.75 mg/L, the TN removal efficiency increased up to 90.6%, and the TN removal efficiency via SND (η(SNDTN)) in the aerobic zone was 56.1%. When the internal recirculation volume ratio decreased from 3 to 2, the TN removal efficiency decreased from 90.2% to 83.7%, and further decreased to 82.8% with increasing internal recirculation volume ratio to 5. When the sludge mass concentration in the aerobic zone decreased from (9.0±0.3) mg/L to (6.0±0.3) g/L,η(SNDTN) decreased from 58.8% to 8.1% and TN removal efficiency decreased from 88.8% to 76.0%.
出处
《水处理技术》
CAS
CSCD
北大核心
2017年第11期116-120,共5页
Technology of Water Treatment
基金
国家国际科技合作项目(2016YFE0123500)
青岛市博士后应用研究项目(2016196)
关键词
黑水
同步硝化反硝化
溶解氧
内回流比
污泥含量
black water
simultaneous nitrification and denitrification (SND)
dissolved oxygen (DO)
internal recirculation ratio
sludge concentration