The effect of leachate recirculation with enzyme cellulase addition on waste stability in landfill bioreactor

4th International Seminar on Sustainable Urban Development

地球科学;经济学

Saffira, N.^1 ; Kristanto, G.A.^1

Environmental Engineering Study Program, Civil Engineering Department, Universitas Indonesia, Depok, Indonesia^1

关键词: Anaerobic bioreactors;    Anaerobic conditions;    Landfill bioreactors;    Leachate recirculation;    Leachates;    lignocellulosic;    Lignocellulosic material;    Polysaccharide decomposition;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/106/1/012119/pdf
DOI  :  10.1088/1755-1315/106/1/012119

来源: IOP

【 摘 要 】

Landfill bioreactor with leachate recirculation is known to enhance waste stabilization. However, the composition of waste in Indonesia is comprised by organic waste which is lignocellulosic materials that considered take a long time to degrade under anaerobic condition. To accelerate the degradation process, enzyme addition is ought to do. Cellulase is an enzyme that can catalyse cellulose and other polysaccharide decomposition processes. Therefore, operation of waste degradation using leachate recirculation with a cellulase addition to enhance waste stabilization was investigated using anaerobic bioreactor landfill. The experiment was performed on 2 conditions; leachate recirculation with cellulase addition and recirculation only as a control. The addition of cellulase is reported to be significant in decreasing organic content, represented by volatile solid parameter. The volatile solid reduction in the cellulase augmented reactor and control reactor was 17.86% and 7.90%, respectively. Cellulase addition also resulted in the highest cellulose reduction. Settlement of the landfill in a bioreactor with enzyme addition (32.67%) was reported to be higher than the control (19.33%). Stabilization of landfill review by the decreasing rate constant of the cellulose and lignin ratio parameter was more rapidly achieved by the enzyme addition (0.014 day-1) compared to control (0.002 day-1).