异养脱氮菌株Bacillus sp. LY降解有毒有机污染物的研究

Biodegradation of Toxic Organic Pollutants by Bacillus sp. LY with Heterotrophic Nitrogen Removal Ability

研究了异养脱氮菌株Bacillus sp. LY降解去除有毒有机污染物的性能.结果表明,菌株在同时实现有毒有机污染物去除与生物脱氮方面具有潜在优势.以典型有毒有机污染物苯酚、邻苯二酚、环境雌激素NP及其前驱物NPEOs为唯一碳源时,该菌株对4种物质的降解去除率分别达87%、77%、96%和80%,一级降解速率常数分别为0.191、0.112、0.435、0.147 d-1.在分别以NP及NPEOs为唯一碳源的条件下,菌株对体系中的总氮亦有一定的去除,表现出异养脱氮能力.这些研究结果可为开发新型高效生物脱氮联合去除有毒有机污染物工艺打下理论基础.

Bacillus sp. LY, with heterotrophic nitrogen removal ability, can biodegrade many kinds of toxic organic pollutants. The study illuminates that Bacillus sp. LY has potential advantages on the biodegradation of toxic organic pollutants combined with heterotrophic nitrogen removal. When using typical toxic organic pollutants, such as phenol, catechol, environment estrogen NP and its precursor NPEOs, as the sole carbon source respectively, removal efficiencies of the four pollutants were 87%, 77%, 96%, 80%, and first-order biodegradation rate constants were 0.191, 0.112, 0.435, 0.147 d^-1 respectively. When using NP and NPEOs as the sole carbon source respectively, Bacillus sp. LY could remove total nitrogen to some extent, manifesting the strain＇s capacity of heterotrophic nitrogen removal. All these results may make contribution to the establishment of new technique of biodenitrification efficiently and removal of toxic organic pollutants simultaneously.