污泥与生活垃圾混合填埋产沼的模拟实验研究

Experimental Simulation of Landfill Gas Production from MSW Co-disposed with Wastewater Sludge

通过城市生活垃圾与污水厂脱水污泥的混合填埋模拟实验 ,研究了添加污泥对垃圾降解及填埋气产生过程的影响。实验结果表明 :在填埋垃圾中添加污泥起到了接种微生物的作用 ,加快了有机垃圾的降解与填埋气的产生 ,产气速率较生活垃圾直接填埋提高3 0 %以上 ;填埋气中CH4 浓度可达到 64% ;与没有添加污泥相比 ,填埋气中CH4 含量有较大幅度的提高 ,有利于填埋气的资源化利用 。

In this paper, the landfill gas generation process was investigated by a landfill lysimeter of municipal solid waste (MSW) co-disposed with wastewater sludge. The experimental results show that the wastewater sludge played a role of inoculation in MSW degradation process and accelerated organic waste decomposition. Compared with the MSW landfill alone, the landfill gas generation rate of MSW co-disposed with sludge was higher by about 30%. The average CH 4 content in landfill gas reached 64%, which was much higher than in case of MSW landfill alone and useful for landfill gas utilization. It is also proved that co-disposal of sludge with MSW is a good choice for beneficial use of sludge.