用于修复污染地表水的黄杆菌固定化工艺

Immobilization Process of Flavobacterium sp. for Bioremediation of Contaminated Surface Water

针对污染地表水的特点,从河水底泥中筛选出一株能有效去除CODCr的黄杆菌(Flavobacterium sp.)进行固定化.通过几种固定化工艺的比较,确定了采用改进的PVA-Na·Alg共固定工艺,确定了聚乙烯醇(PVA)10.5%,海藻酸钠(Na·Alg)0.5%,活性炭3%及微量生长素的凝胶剂组成.运行78 h的测试结果表明,固定化颗粒对污染地表水中CODCr的去除率为86.27%,明显高于游离菌对CODCr的去除率59.65%.

According to the characteristics of contaminated surface water, a strain of Flavobacterium sp. that could remove CODcr efficiently was picked out from river substrate sludge and then immobilized. Comparing .several immobilization processed,an efficient kind of carrier was found, i.e., a gel made up of 10.5% PVA, 0.5% Na. Alg, 3% activated carbon and microdose of auxin. The results showed that the immobilized Flavobacterium sp. can remove 86.27% CODcr from contaminated surface water in 78 hours, much higher than the 59.65% removal rate by free ones.