垃圾中含碳有机物厌氧降解过程的独立性探讨

Independence of Anaerobic Biodegradation of Carbonaceous Organic Materials

混合垃圾中单物质纤维素、淀粉、脂肪和蛋白质降解的独立性与否可为模拟和预测填埋场任意时刻的产气特性和稳定化进程提供依据。本文对单物质降解的独立性进行了探讨,已有的试验研究结果表明,在厌氧填埋环境下,单物质的厌氧产气量具有可叠加性,即各种单物质的降解是独立的。但是根据葡萄糖效应,在单一菌种纯培养试验中,会出现分解代谢物的阻遏作用,即难降解有机物的分解转化会受到易降解有机物的抑制。在垃圾填埋过程中,由于微生物生态系统复杂,可能会在具体环境中产生一些特殊的抗分解代谢物阻遏作用的微生物。如要从理论上确定填埋垃圾中有机物厌氧降解过程的独立性问题,需要设计专门的微生物学和酶学试验作进一步研究。

Independence of anaerobic biodegradation of carbonaceous organic material is of importance. It can provide theoretical basis for the simulation and prediction of the gasification characteristics and stabilization process. According to the research of the predecessor, this paper analyses the independence of anaerobic biodegradation of carbonaceous organic material. There might be catabolite repression in pure culture for bacteria, but not absolutely. During the landfill of the refuse, mutant resistant to the repressor may occur because microbial ecosystem is complex. The further study will go on for determining the independence of anaerobic biodegradation of carbonaceous organic material.