摘要
采用正交试验法对浸没式平板金属膜生物反应器(MBR)进行运行参数的优化研究。试验选择抽停时间比、曝气量、反洗频率与反洗水量等4个参数为因素,使用膜操作压力变化率K进行评价,结果表明各参数对膜过滤性能的影响为:抽停时间比>反洗频率>反洗水量>曝气量;优化运行参数为:抽停时间比6∶1,反洗频率2次/h,反洗水量2m3/(m2.d),曝气量10L/min。膜过滤阻力组成部分的测定表明,滤饼层阻力为膜阻力的主要组成部分,曝气量过大会导致膜内部污染的加剧。
An orthogonal design was adopted to optimize the operational parameters for a submerged flat metal membrane bioreactor(MBR).Four operational parameters including ratio of suction/non-suction time,aeration rate,backwashing frequency and backwashing flux were chose as the factors.The change rate of transmembrane pressure(TMP) was used as the evaluate index.Ratio of suction/non-suction time was observed to have the largest effect on membrane filtration characteristics followed by backwashing frequency,backwashing flux and aeration rate.The optimum operational parameters were ratio of suction/non-suction time 6min:1min,backwashing frequency 2 time·h-1,backwashing flux 2m3·m-2·d-1 and aeration rate 10 L·min-1.The composition of filtration resistance showed that cake layer fouling was the major resistance and excessive aeration aggravated internal resistance.
出处
《节能》
2008年第5期12-14,共3页
Energy Conservation
基金
辽宁省企业项目博士后资助基金(BSH-2004921023)
关键词
金属膜
膜生物反应器
运行参数
优化
膜污染
metal membrane
membrane bioreactor(MBR)
operational parameter
optimization
membrane fouling
