高效原油降解菌的筛选及其降解能力的研究  

Study on Screening of Highly Efficient Crude Oil Degrading Bacteria and Their Degradation Capability

作　　者：谢鲲鹏[1] 宫正[2] 赵慧[1] 马红[1] 

机构地区：[1]辽宁师范大学生命科学学院,辽宁大连116029 [2]大连理工大学环境与生命学院,辽宁大连116024

出　　处：《辽宁师范大学学报（自然科学版）》2005年第2期228-231,共4页Journal of Liaoning Normal University:Natural Science Edition

摘　　要：从原油污染的土壤和水体中分离到3株高效原油降解菌,其中LSD-3在原油浓度为120mg/L的废水中,经过5d的培养,原油的降解率为69%左右.并对单菌株和混合菌种降解原油的能力做了比较,发现混合菌种比单菌株对原油具有更好的降解能力,达到75%以上.同时对混合菌种降解原油的最适条件做了研究,确定了混合菌种降解原油的最适条件为pH值7.5、矿化度7800mg/L、温度40℃、好氧、原油浓度为50～150mg/L.In this paper, three bacteria strains were isolated from the soil and water polluted by crude oil and applied to degrate waste water. When 120 mg/L oily waste water was degraded by LSD-3,degrading rate of crude oil was up to 69% after 5 days. Comparing with single bacteria, we find mixed bacteria, whose degrading rate of crude oil was up to 75%, have better degradation ability. At the same time, we study the best condition of mixed bacterial degradation and confirm that the best condition of mixed bacteria degradation was: pH7.5,mineralized rate 7 800 mg/L,temperature 40 ℃,fine oxygen, crud oil density 50~150 mg/L.

关 键 词：原油降解菌 降解能力 高效 混合菌种 筛选 最适条件 原油污染 降解率 pH值 矿化度 浓度 菌株 水体 废水 好氧 

分 类 号：X53[环境科学与工程—环境工程] X172