城市生活垃圾降解率分析研究

针对城市生活垃圾降解率研究不足的现状,结合室内物理模拟实验,对垃圾温度和垃圾降解率的变化规律进行分析研究。研究结果表明,填埋初期垃圾填埋体温度升高较快,服从三次曲线变化规律;温度对垃圾降解率有重要的影响,单一温度下垃圾降解率随时间变化近似符合微生物生长曲线;不同温度下,温度高,垃圾降解率快,试验证明41.00、45.00℃垃圾降解率最快,垃圾降解率相差不大,可以认为温度高于41.00℃时垃圾降解率可以按照41.00℃时垃圾降解率计算。

Research on degradation rate of municipal solid waste

Temperature plays a vital role in the degradation of municipal solid waste (MSW). The data of refuse temperature at different depth of MSW landfill were colleted to study the vertical distribution of refuse temperature in MSW landfill. The results showed that the temperature of refuse rose faster in initial time of landfill, the vertical distribution trend of refuse temperature could be described by cubic curves. Batch of simulated refuse columns experiments under different temperature were conducted to further study the effect of temperature on refuse degradation. It could be concluded that the degradation rate of refuse under single temperature approximately agree with growth curve, and the degradation rate increased with increasing the temperature. The degradation rates of refuse at 41. 00 and 45. 00 ℃ were fastest and showed little difference, therefore, the degradation rates of refuse at temperature higher than 41. 00 ℃ could calculate as that of 41. 00 ℃.