摘要
分置式膜－生物反应器处理生活污水的运行结果表明，在不同的污泥龄和水力停留时间下，处理效果稳定，污泥上清液中ＣＯＤ浓度平均为１９．５ｍ ｇ／Ｌ，膜出水ＣＯＤ浓度平均为５．３ｍ ｇ／Ｌ． 对分置式－生物反应器的体积负荷进行推导表明，浓缩区的存在是该工艺处理能力较大的原因． 体积负荷由膜出水有机物浓度与污泥混合液有机物浓度之比α，浓缩区与反应器体积之比β和膜出水量与污泥混合液循环流量之比λ决定，即可以通过增加浓缩区体积和调整循环流量来控制分置式－生物反应器的处理能力．
Treatment efficiency of domestic wastewater by Recirculated Membrane Bio Reactor showed that under various sludge age and hydraulic retenton time,stable performance was observed and the COD concentration of the sludge supernatant and membrane filtrate averaged to be 19.5mg/L and 5.3mg/L respectively.The higher treatment capability of the system relies on the volume of concentration zone.A formula to calculate volumetric loading rate was obtained which showed its dependence on three ratios designated by α ,the COD concentration of filtrate over that of the sludge suspension, β ,the concentration zone volume over reactor volume and λ ,the effluent flow rate over the recirculation rate.It consequently indicated that the volumetric loading rate can be elevated through increasing filtration rate of enlarging concentration zone volume.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2000年第2期24-27,共4页
Environmental Science
基金
国家自然科学基金!项目59878025
关键词
生物反应器
生活污水
体积负荷
废水处理
Recirculated Membrane Bio Reactor,domestic wastewater,concentration,volumetric loading rate,treatment capability.
