含油废水处理微生物的化学包埋法固定化工艺

针对含油废水的特点,从盘锦某沥青厂被稠油污染的土壤和该厂含油废水生化处理单元的活性污泥中,经过筛选、驯化实验,获得TA-11,TA-17,HA-9,HD-1 4株对油类物质具有高效降解去除能力的细菌.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64 h的测试结果表明,4种菌株的固定化颗粒对含油污水中CODCr的去除率分别为62%,65%,68.5%和66.5%,明显高于游离菌对CODCr的去除率.

Chemical Embedding Immobilization Technique of Microorganism Used in Oil Contaminated Wastewater Remediation

According to the characteristics of thick oil contaminated wastewater in an asphalt plant in Panjin, four strains of microorganism named TA-11, TA-17, HA-9 and HD-1, which can degrade oil and CODCr of oil contaminated wastewater, were picked out from the oil contaminated soil and activated sludge of Panjin pitch plant wastewater treatment system, and then it was immobilized by chemical embedding technique. Through the conditional tests of immobilizing parameters, an improved co-immobilization technique with PVA and sodium alginate was determined, where the immobilizing gel was made from 10.5% PVA, 0.5% Na · Alg, 3% activated carbon and trace auxin. Experimental results showed that the four strains of microorganism immobilized in such a way are able to remove 62%, 65%, 68.5% and 66.5% of CODCr in oil contaminated wastewater after 64 hours, which was much higher than the removal rate by free bacterium.