ผลกระทบของการหมุนเวียนน้ำชะมูลฝอยที่เติมอากาศต่อการยุบตัวของมูลฝอยชุมชนภายในถังจำลองหลุมฝังกลบ

Abstract

The aim of this research is to study the impact of the aeration of recirculated leachate on the settlement of municipal solid waste (MSW) in a simulated landfill. Reactors with a length of 0.40 m width of 0.40 m and height 1.20 m were used to decompose synthetic MSW consisting of food waste, paper and plastic. This study consists of 2 main experiments. The first experiment studied the effect of recirculation frequency on the settlement of MSW in simulated landfill. The result showed that the reactor with continuously leachate recirculation and the one with weekly leachate recirculation has 33.3 and 29.3 percent of settlement strain respectively. The second experiment studied the effect of aeration of recirculated leachate on the settlement of MSW in a simulated landfill. The result showed that aeration of continuously recirculated leachate when COD was below 2,500 mg/L or when the internal condition is completely anaerobic was unable to enhance the settlement of MSW in the simulated landfill. The settlement strain in the one with aeration and without aeration was 21.3 and 30.7 percent respectively. On the other hand, aeration of continuously recirculated leachate from the beginning increased the settlement of MSW in the simulated landfill. The settlement strain in the one with aeration from the beginning was 45.3 percent while the settlement strain of the one without aeration was only 29.3 percent. In conclusion, continuously recirculating leachate with aeration from the beginning results in higher settlement strain of MSW in a simulated landfill than continuously recirculating leachate without aeration.