活性炭-超滤工艺处理黄河上游原水的试验研究.doc

摘要
采用活性炭-超滤膜联用工艺对黄河上游原水进行试验。试验的主要内容是活性炭的选择、该联用工艺对有机物的去除效果、粉末活性炭改善膜透水通量以及防止膜污染的效果。
试验结果显示:粉末活性炭吸附效果优于颗粒活性炭,粉末活性炭投加量为100mg/L时,%,%,颗粒活性炭投加量为150mg/L时,%,%。黄河上游原水中有机物的分子质量主要集中在小于10000Da的区间,占总有机物的75%左右,这部分有机物是造成膜污染的主要物质。粉末活性炭预处理黄河上游原水后,主要去除的是分子质量小于10000Da的有机物,粉末活性炭投加量为10mg/L时,%,10000Da-%,%;投加量为100mg/L时,%,10000Da-%,%,粉末活性炭优先吸附小分子物质,能有效地延缓膜污染。粉末活性炭预处理单元能够改善膜的透水通量,过滤第七个周期时,%,%,通过水力冲洗,膜通量能得到较好的恢复,说明粉末活性炭可有效地改善膜通量。
关键词:黄河原水,超滤膜,活性炭,膜通量,有机物相对分子质量
Abstract
With actived carbon-ultrafiltration membrane technology to test the raw water of the upper reaches of the Yellow was mainly the choice of actived carbon,bined process on anic removal,powered activated carbon to improve the membrane permeable flux,prevented the effect of membrane fouling.
The result showed that powdered activated carbon adsorption more effective than granular activated carbon,PAC dosage was 100mg/L,CODMn removal effciency was %,PAC dosage was 100mg/L,UV254 removal effciency was %,GAC dosage was 150mg/L,CODMn removal effciency was %,GAC dosage was 100mg/L,UV254 removal effciency was %.Organic removal process was better by PAC-UF. The upper reaches of the Yellow River anic molecular weight was less than 10000Da and this part of anic was75% of anic and was main fouling substances. When PAC treatment of raw water of the upper reaches of the Yellow River,the removal of molecular weight was less than anic. PAC dosage was 10mg/L,total UV254 removal effciency was %, UV254 removal effciency was % between 10000Da and 1000Da, removal effciency was % less than 1000Da; PAC dosage was 100mg/L,total UV254 removal effciency was %, UV254 removal effciency was % between 10000Da and 1000Da, removal effciency was % less than 1000Da .PAC preferentially