Geotextile clogging at different stages of municipal solid waste landfills co-disposed with bottom ash

被引:18
|
作者
Ko, Jae Hac [1 ]
Wang, Qian [1 ]
Yuan, Tugui [1 ]
Wu, Huanan [1 ]
Xu, Qiyong [1 ]
机构
[1] Peking Univ, Shenzhen Grad Sch, Sch Environm & Energy, Shenzhen Engn Lab Ecoefficient Recyded Mat, Shenzhen 518055, Peoples R China
关键词
Bottom ash; Co-disposal; Landfill stages; Geotextile; Clogging; LEACHATE COLLECTION; IMPACT; PERFORMANCE; WATER; MSW; PH; EVOLUTION;
D O I
10.1016/j.scitotenv.2019.06.119
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Co-disposal of bottomash (BA) with municipal solid waste (MSW) in landfills is a common way for BA management. However, BA co-disposal in MSW landfills may accelerate geotextile clogging and reduce the performance of leachate collection system. This study compared geotextile clogging in a simulated MSW landfill leachate (MSWL) and a BA co-disposed landfill leachate (BAL) at different landfill stages. Geotextile clogging test was conducted using the MSWL and BAL taken from the simulated landfills on the 10th, 80th, 140th and 200th day, respectively. The results demonstrated that geotextile clogging varied with landfill age, due to the change of leachate characteristics. The mass of clogging material in geotextiles with BAL increased from 0.45 g to 2.74 g, which was 43.87%-63.73% greater than those with MSWL. The formation of biofilm was the main contributor for the geotextile clogging. At the same stage, the amount of biofilm formed on geotextile in different leachate was comparable. However, the amounts of CaCO3 precipitation on geotextile in BAL were 3.85-10.44 times of those in MSW leachate. The pH of leachate played a critical role in CaCO3 precipitation. The microbial analysis revealed that the co-disposal of the BA greatly influenced the microbial community diversity and structure. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页码:161 / 167
页数:7
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