This article presents the effect of biological clogging on the hydraulic performance of geotextiles used for the construction of filter and drainage in landfills. Clogging tests were performed on specimens of woven and non-woven geotextiles in a discontinuous fermentation scenario using natural leachate and a nutrient solution. The consequences of biological clogging were assessed through experimental measurements of changes in the cross-plane hydraulic conductivity and the impregnation ratio of different geotextiles specimens at different immersion times. Porosity reduction was then back-calculated from the hydraulic conductivity results using the Kozeny-Carman equation. Additionally, the impact of an antibiotic and antifungal solution on biofilm development was evaluated. It was demonstrated that the cross-plane hydraulic conductivity of geotextile specimens decreases as biomass accumulation per unit area increases with immersion time. The application of an antibiotic and antifungal solution resulted in a porosity recovery of over 90% and a hydraulic conductivity recovery ranging from 78 to 83% for both woven and non-woven geotextiles. These results demonstrate that the clogging was primarily due to biological activity. Despite certain limitations in measurement and definition, the impregnation ratio proved to be a reliable parameter for the evaluation of biological clogging.

中文翻译：

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不连续发酵情景下土工布的生物堵塞


本文介绍了生物堵塞对垃圾填埋场用于建造过滤器和排水的土工布的水力性能的影响。使用天然渗滤液和营养液在不连续发酵的情况下对编织和非织造土工布的样品进行堵塞测试。通过对不同土工布试样在不同浸泡时间下的跨平面水力传导率和浸渍率变化的实验测量，评估生物堵塞的后果。然后使用 Kozeny-Carman 方程根据水力传导率结果反算孔隙率降低。此外，还评估了抗生素和抗真菌溶液对生物膜发育的影响。结果表明，土工布试样的跨平面水力传导率随着浸泡时间的增加而降低。使用抗生素和抗真菌溶液后，机织和非织造土工布的孔隙率恢复率超过 90%，水力传导率恢复率为 78% 至 83%。这些结果表明，堵塞主要是由于生物活性造成的。尽管在测量和定义方面存在一些限制，但浸渍比被证明是评估生物堵塞的可靠参数。