Abstract:

In order to supply microorganism resources to LAS pollution control, the author dealt with isolating a strain with high degradability to degrade LAS from environment and studying on its degradability. The strain with high degradability to degrade LAS, isolated through enrichment culture method from sludge soaked in detergent sewage for a long time in a region of Chongqing was called L1. The strain L1 was preliminarily recognized as Xanthomonas sp by the analysis of its morphology, physiology and biochemical characteristics. After studying, its growth and degradation rate of LAS was comparatively stable when the pH ranged between 5.0-7.5 and it could reach its summit when the pH was 7.0. What’s more, it had certain ability on pH regulations. When the consistency of LAS was 150 mg/L, it was the most favorable consistency to the growth of L1 and the degrading of LAS: the growth of L1 during 48 h could reach 0.413 (OD460) and the degrading rate was as high as 87.64%. All this showed that the strain L1 had certain potential in LAS pollution control.