基于垃圾产气速率差异的填埋气体产生量预测模型的探讨

根据大韩庄垃圾填埋场进场垃圾的特性,对CJJ 133—2009的产气预测模型进行探讨。将垃圾分为快速降解和慢速降解2部分,对产气速率常数分别取值。结果表明：产气峰值发生在封场后的第1年,达到3 029.6万m3/a,封场后第10年产气量降低至峰值的29.0%。与CJJ 133—2009推荐模型相比,填埋期间本研究使用模型的产气量更高,峰值可高出9.8%。封场后该模型产气量的衰减速率也更快,但在第10年后两者的产气量开始逐渐趋同。

Landfill Gas Generation Model Based on Difference of Gas Generation Rate of Waste

According to the waste characteristics of Dahanzhuang Waste Landfill Site,the gas generation model in CJJ 133—2009 was discussed.The waste was divided into rapid biodegradable group and slowly biodegradable group while values of gas generation rate constant were taken for two groups respectively.The results showed that the peak volume of gas generation was 30.296 million m3/a occurred in the first year after closure,and gas volume in the tenth year will decrease to 29.0% of peak volume.Compared with the model recommended by CJJ 133—2009,the improved model had higher gas generation volume and peak volume was 9.8% higher than that of the recommendation model during landfill operations.And after closure,the improved model had the more rapid decay rate,but gas volumes of two models begin to reflect convergence in the tenth year.