石油降解菌的筛选及其降解能力的研究

从广州石化污水处理厂废水中自行分离出 30株除油菌 ,用市售的 90 # 柴油作为油品进行筛选 ,所得菌种用于处理石化厂物理隔油后的废水。通过研究含油量和接种量对除油率、COD的去除率和pH值的影响以及酸、碱、盐对除油率和COD去除率的影响来比较这些菌种对石化废水的处理效果。结果表明 ,6 # 菌株除油和去除有机物的效果都比较好 ,除油率约在 70 %左右 ,最高为 83.6 7% ,COD去除率约为 5 5 %左右 ,最高为 6 0 .0 1% ;5 # 菌株对环境要求较高 ,在碱性环境下表现出较好的除油和去除有机物的能力 ,除油率和COD去除率分别为 5 5 %和 5 0 %左右。实验菌株在消除石化废水的异味方面也有一定的效果。

Screening of crude oil degrading strains and their degradation capability

In this paper, the biodegradation of oily chemical industrial wastewater containing crude oil was studied. Thirty bacteria strains were isolated from the oily wastewater. The diesel oil, which was brought from a gas station, was used as a sample to pick out the high-effective domestic microbes. Two bacteria strains were used in further experiment to compare their oil removal effect. Experimental results showed that the oil removal of 6 # was about 70%, the highest removal rate was 83.67%; and the COD removal of it was about 70%, the highest removal rate was 79.81%. The removal rates of oil and COD of 5 # were about 55% and 50% respectively. Furthermore, the strains could get rid of the bad odors too.