Bio-clogging of geotextile is a big challenge for the leachate collection system in landfills. It is important to understand the characteristics of geotextile bio-clogging to develop control technologies. This study investigated the characteristics of geotextile bio-clogging in municipal solid waste landfill (MSW_G) and bottom ash (BA) co-disposal landfill (BA_G). Results showed that the bio-clogging mass of per area in MSW_G and BA_G was 49 ± 5 g/m² and 57 ± 3 g/m², respectively. Bio-clogging was dominated by live cells in both MSW_G and BA_G. The confocal laser scanning microscopy images revealed that live cells percentage was 46% in MSW_G, while it increased to 77% in BA_G. In contrast, the percentage of the dead cells was 47% and 9% in MSW_G and BA_G, respectively. The biofilm formed in BA _G was thinner and denser than that in MSW_G. Based on the microbial analysis, the biofilms of BA_G had a higher genetic amount and diversity than these of MSW_G. The total amount of extracellular polymeric substances in BA_G was 45.29 ± 4.52 mg/g volatile suspended solids, which was 1.5 times of that in MSW_G. The co-disposal of BA increased the microbial diversity and accelerated bio-clogging due to the high calcium concentration. These findings provide a better understanding of the bio-clogging characteristics, which is helpful to control bio-clogging in co-disposal landfills.

土工织物的生物堵塞是垃圾填埋场渗滤液收集系统的一大挑战。重要的是要了解土工织物生物堵塞的特征，以开发控制技术。本研究调查了市政固体垃圾填埋场（MSW_G）和底灰（BA）共处理垃圾填埋场（BA_G）中土工布生物堵塞的特征。结果表明，MSW_G和BA_G中每单位面积的生物阻塞质量为49±5 g / m ²和57±3 g / m ²， 分别。在生物垃圾中，MSW_G和BA_G中的活细胞占主导地位。共聚焦激光扫描显微镜图像显示，MSW_G中活细胞百分比为46％，而BA_G中活细胞百分比增加至77％。相反，MSW_G和BA_G中死细胞的百分比分别为47％和9％。BA _G中形成的生物膜比MSW_G中的生物膜薄且致密。根据微生物分析，BA_G的生物膜比MSW_G具有更高的遗传数量和多样性。BA_G中细胞外聚合物的总量为45.29±4.52 mg / g挥发性悬浮固体，是MSW_G中的1.5倍。由于高钙浓度，BA的共同处置增加了微生物多样性并加速了生物堵塞。这些发现可以更好地理解生物阻塞特性，