The Study Of Microbial Community's Succession In Complicated Waste Composting System Based On Quinone Profile Method

Composting system is a complicated system, the microbe play a chief role in the waste's reduction, recycle and safe treatment, due to the decompostion。In view of the huge number of the microbe, there will be a great improvement in the composting technology for the advancement of the decomposting efficiency.The compost is controled by the composting microbe,and the microbe is controled by the external condition and the internal conditon。This study is going to build a properly composting system in which the microbe could reproduce smoothly, and then study the reproduce rule of the microbe with the analytic method and the mathmatic method, trying to learn the microbe's ecological charateristic which could be the refrence for the study of how to improve the composting course.The succession of microbial community in Pb-contaminated waste composting were studied by quinone profile method, together with cluster analysis. Pb brings negative effect to both total microbe content and diversity of the microbial community, but at the end of the composting the diversity level could resume to the initial situation, at the same time Pb promoted microbial community's uniformity, the differences of each microbe biomass becomes smaller. The data of quinone profile indicate that there is no new dominant microbe in the Pb-contaminated waste compost; That the microbe contained MK-6 or Q-8 as the main quinone shows the low-resistance toward Pb, and that the microbe containing MK-7(H4) or Q-7 as the main quinone increased prominently shows the high-resistance toward Pb; Pb's effect is most obvious in the first fermentation period, but it slowed down gradually along with the composting process, which shows that composting process could weaken the Pb's toxicity to a certain extent.