磺胺嘧啶在水中的微生物降解研究

为了探明磺胺嘧啶在水中的环境行为,通过室内模拟降解实验分别研究了磺胺嘧啶在湖水和猪场废水中的好氧和厌氧微生物降解,考察了供氧方式和有机质含量对磺胺嘧啶微生物降解的影响。结果表明:磺胺嘧啶在猪场废水中厌氧微生物降解速率高于其好氧组,而磺胺嘧啶在湖水中厌氧微生物降解速率低于其好氧组。磺胺嘧啶在湖水和猪场废水中的好氧或厌氧微生物降解均较缓慢,这可能与其较强的抑菌性和微生物的营养状况有关。通过微生物培养还研究了好氧降解时磺胺嘧啶对湖水中微生物种群生长的影响,数据显示:磺胺嘧啶对湖水和猪场废水中细菌的生长具有一定的刺激作用,而对真菌和放线菌的生长影响不明显。

Microbial degradation of sulfadiazine in water

In order to study the environmental behavior of sulfadiazine in water, aerobic and anaerobic microbial degradation for sulfadiazine in lake water and piggery wastewater were carried out through indoor simulation degradation experiments to investigate the influence of oxygen supply mode and organic matter content in water on microbial degradation for sulfadiazine. The results indicated that the anaerobic degradation rate of sulfadiazine in piggery wastewater was more rapid than that for aerobic degradation; the anaerobic degradation rate of sulfadiazine in lake water was slower than that for aerobic degradation; the aerobic or anaerobic degradations for sulfadiazine in lake water and piggery wastewater were all slow, which might be attribute to its strong antibacterial activity and nutritional status for microorganism. Moreover, effect of sulfadiazine on growth for microbe in lake water and piggery wastewater was studied by cultivation of microorganisms, and it was showed that the number of bacteria except fungi and actinomycete grew significantly.