摘要
从环境微生物工程角度出发，以２０～＃机油为唯一碳源，从含油污泥中筛选出３株降解机油能力较强的苗株，借助形态学观察和生理生化试验，鉴定为：动胶菌属（Ｚｏｏｇｌｏｅａ ｓｐ.）、氮单胞菌属（Ａｚｏｍｏｎａｓ ｓｐ．）和假单胞菌属（Ｐｓｅｕｄｏｍｏｎａｓｓｐ.）．对上述３菌株分别进行摇瓶试验，在此基础上，选择除油能力最强的动胶菌属 ＬＤ＿２菌株，进行生物接触氧化法处理含２０～＃机油废水的室内动态模拟试验．结果表明，动胶苗属ＬＤ＿２ Ｎ株降解机油能力比较显著：当入流质量浓度为 ４２４～１４３２ ｍｇ／Ｌ时，出流水中 ２０～＃机油含量降为 ０～２０ ｍｇ／Ｌ，除油率达到９７ ％～１００％．用１８～＃机油代替２０～＃机油，出流质量浓度降到４～１０ｍｇ／Ｌ，除油率达到９８％以上．以上经过处理的出流水质均达到国家污水排放标准．
In order to treat wastewater containing lubrication oil by degrading bacteria, lubrication oil No. 20 was used as the sole carbon source to isolate and select bacterium genera which have high degrading capacity for lubrication oil in sludge contaminated with oil. Through morphological and biochemical methods, three types of bacterium genera were primarily identified as Zoogloea sp., Azomonas sp. and Pseudomonas sp. The Zoogloea strain showed the high- est capacity to degrade lubrication oil No. 20 among the tested strains in shaking flasks. On the basis of the preliminary results, Zoogloea strain was chosen to treat the wastewater contaminated by lubrication oil No. 20, using biological contacted oxidation method in small-scale tests. The wastewater was treated in three oxidation pools for different Hy- draulic Retention time( HRT) for 6 h and 12 h, respectively. The experiments showed a positive result that the con- centration of lubrication oil No. 20 was significantly reduced to 0-20 mg/L in the treated water, compared to the con- centration of 424-1 432 mg/L in the untreated water. The degrading rates varied between 97%-100%, and as a con- sequence, the quality of the treated water reached to the national standards for contaminated water. Lubrication oil No. 18 was also included in the test to examine the degrading capacity of Zoogloea strain. Similar results were obtained in this test, where the degrading rates for lubrication oil No. 18 was 98%, reaching to the national standards for contam-inated water.
出处
《复旦学报（自然科学版）》
CAS
CSCD
北大核心
2001年第5期562-567,共6页
Journal of Fudan University：Natural Science
