含水率及填埋工艺对垃圾土中有机物降解的影响

Research on effect of water content and landfill technics on municipal solid waste organic matter degradation

含水率和填埋工艺是影响有机物降解的因素。根据重庆市垃圾土的成分特点,自配试样进行降解试验,研究在不同的含水率及填埋工艺下,有机物的质量、降解率及降解速率变化情况。试验结果表明:有机物降解率符合Logistic模型规律,降解速率有先增大后减小的趋势。含水率及填埋工艺均对有机物降解有影响。当含水率为50%时,水对有机物降解有促进作用,有机物最易发生降解。在敞口状态下,有利于有机物降解。通过结果分析,解释了推铺以及渗滤液回灌的机理。

The water content and landfill technics is one of influencing factors on organic matters degradation.According to the component character of Chongqing municipal solid waste (MSW),the MSW sample was confected and the degradation test was carried out under different water content and landfill technics conditions to research the change condition of quality,degradation ratio and degradation speed.The results show that the degradation ratio present rule of Logistic model.Degradation speed has the trend of first increased and then decreased.The water accelerates the organic matter degradation,the organic matters is easiest to degradation when the water content is 50%.On the open condition,the organic matter is easier to degradation.Through the results analysis,explain the mechanism of spreading and recharging leachate.this is significance to the MSW landfill's operation and management.