摘要
在常温下,采用沼气循环厌氧膜生物反应器(MCAn MBR)处理模拟高盐有机废水,当进水Na Cl浓度<19.21 g/L、温度>22℃时,盐度对厌氧微生物没有明显的抑制作用,对COD的去除率>94%;在温度为14.9~18.1℃,MLSS为23.79~32.22 g/L,进水Na Cl浓度分别为17.0~18.0、18.0~19.0 g/L时,经短期驯化,对COD的平均去除率分别为83.37%、82.61%;而当进水Na Cl浓度>19.0 g/L时,对COD的去除率明显下降,且短期内无法恢复。MCAn MBR高效的污泥截留作用增强了微生物的耐盐性能,高污泥浓度是厌氧膜生物反应器在高盐环境下取得高有机物去除率的关键。
Anaerobic membrane bioreactor with methane cycle （MCAnMBR） was adopted to treat simulated high salinity organic wastewater under normal temperature. The results showed that when the temperature was higher than 22 ℃ and the concentration of sodium chloride was below 19.21 g/L, there was no obvious inhibition and the COD removal rate was more than 94%. When the temperature v-as be- tween 14.9 ℃ and 18.1 ℃, MLSS was from 23.79 g/L to 32.22 g/L, and the NaC1 concentration in the influent was from 17.0 g/L to 18.0 g/L and from 18.0 g/L to 19.0 g/L, the average COD removal rate were 83.37% and 82.61% , respectively, after short-term domestication. When the NaC1 concentra- tion was high than 19.0 g/L, the COD removal rate obviously decreased and was unable to recover in the short term. The highly efficient sludge interception of MCAnMBR enhanced the salt resistance of microor- ganism. High sludge concentration was the key to anaerobic membrane bioreactor to achieve high organic removal efficiency in salty environments.
出处
《中国给水排水》
CAS
CSCD
北大核心
2017年第17期117-121,共5页
China Water & Wastewater
关键词
厌氧膜生物反应器
沼气循环
高盐有机废水
耐盐性能
污泥浓度
anaerobic membrane bioreactor
methane cycle
high salinity organic wastewater
salt resistance
sludge concentration
