难降解有机污染物共降解机理解析

应用构建于关键酶的细胞２个层次的共降解数学模型，对高生物量和低生物量２种情况下难降解有机物（三氯乙烯）的共降解进行了模拟分析。结果表明，第一营养基质的诱导作用决定着共降解微生物细胞内关键酶的浓度，但是，由于竞争关系，过高的营养基质浓度反而导致共降争速率的下降，适当投加能量基质能够提高共降解过程速率，但是过量投加能量基质可能不利于长期维持微生物的活性。在共降解过程中，微生物能够通过自我恢复作用，对抗

Analysis of Cometabolic Biodegradation of Refractory Organic Pollutants

This paper analyzed the cometabolism of refractory organics like trichloroethylene (TCE). The analysis was based on a comprehensive model constructed at both enzymatic and microbial levels. According to the model simulation for high biomass and low biomass, the production of key enzymes was dominated by primary substrate, while overhigh addition of primary substrate would make the cometabolic rate decline due to competitive inhibition. Appropriate addition of energy substrate could stimulate the cometabolism, however, excessive addition of energy substrate would not benefit the active microbes in long-term. In cometabolism, the microbes could take advantage of its self-recovery function to fight against toxic inactivation, thus self-recovery might be a critical factor to be explored.