Bottom ash co-disposed in landfills accelerates geotextile clogging and decreases landfill stability. As the main contributor to clogging, bio-clogging may be associated with quorum sensing (QS) in microbial communities. This study investigated the potential roles of acyl-homoserine lactones (AHLs)-mediated QS in geotextile bio-clogging under different landfill conditions, including municipal solid waste landfill and bottom ash co-disposal landfill. The unit area of geotextile bio-clogging mass in the municipal solid waste landfill (MSW_G) ranged from 5.2 × 10^-3 to 8.2 × 10^-3 g/cm²_, while it was in the range of 8.4 × 10^-3 to 1.2 × 10^-2 g/cm² in the bottom ash co-disposal landfill (BA_G). Two types of AHLs were detected and the total AHLs content in the MSW_G (1,616.9 ± 103.8 ng/g VSS) was half of that in the BA_G (3,233.0 ± 646.8 ng/g VSS). High contents of the AHLs could increase bio-clogging. The bio-clogging was also attributed to QS genes and extracellular polymeric substances (EPS). EPS aggregation was stimulated due to the higher Ca²⁺ and Mg²⁺ in the BA_G. These results suggested that the co-disposal of bottom ash could increase the AHLs content, resulting in accelerated bio-clogging.

堆放在垃圾填埋场中的底灰会加速土工织物的堵塞，并降低垃圾填埋场的稳定性。作为堵塞的主要因素，生物堵塞可能与微生物群落的群体感应（QS）有关。这项研究调查了酰基-高丝氨酸内酯（AHLs）介导的QS在不同垃圾填埋条件下（包括城市固体垃圾填埋场和底灰共同处置填埋场）在土工织物生物堵塞中的潜在作用。城市生活垃圾填埋场（MSW_G）的土工织物生物阻塞质量的单位面积为5.2×10 ^-3至8.2×10 ^-3 g / cm ² _，而其范围为8.4×10 ^-3至1.2 ×10 ^-2克/厘米²在底灰共同处置掩埋场（BA_G）中。检测到两种类型的AHL，MSW_G中的总AHL含量（1,616.9±103.8 ng / g VSS）是BA_G中的一半（3,233.0±646.8 ng / g VSS）。高含量的AHL可能会增加生物堵塞。生物阻塞也归因于QS基因和细胞外聚合物（EPS）。由于BA_G中较高的Ca ²⁺和Mg ²⁺，刺激了EPS聚集。这些结果表明，底灰的共同处置可能会增加AHL的含量，从而加速生物堵塞。