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Kinetics of carbendazim degradation in a horizontal tubular biofilm reactor

机译：水平管状生物膜反应器中多菌灵降解的动力学

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The fungicide carbendazim is an ecotoxic agent affecting aquatic biota. Due to its suspected hormone-disrupting effects, it is considered a "priority hazard substance" by the Water Framework Directive of the European Commission, and its degradation is of major concern. In this work, a horizontal tubular biofilm reactor (HTBR) operating in plug-flow regime was used to study the kinetics of carbendazim removal by an acclimated microbial consortium. The reactor was operated in steady state continuous culture at eight different carbendazim loading rates. The concentrations of the fungicide were determined at several distances of the HTBR. At the loading rates tested, the highest instantaneous removal rates were observed in the first section of the tubular biofilm reactor. No evidence of inhibition of the catabolic activity of the microbial community was found. Strains of the genera Flectobacillus, Klebsiella, Stenotrophomonas, and Flavobacterium were identified in the biofilm; the last three degrade carbendazim in axenic culture.
机译：多菌灵杀菌剂是一种影响水生生物的生态毒性剂。由于其具有令人怀疑的破坏激素的作用，因此被欧盟委员会的《水框架指令》视为“优先危害物质”，并且其降解备受关注。在这项工作中，以活塞流方式运行的卧式管状生物膜反应器（HTBR）被用于研究驯化微生物财团去除多菌灵的动​​力学。反应器在稳态连续培养下以八种不同的多菌灵上样速率运行。在距HTBR几处的距离处测定杀菌剂的浓度。在测试的加载速率下，在管状生物膜反应器的第一部分观察到最高的瞬时去除速率。没有发现抑制微生物群落分解代谢活性的证据。在生物膜中鉴定出Flectobacillus，Klebsiella，Stenotrophomonas和Flavobacterium属的菌株。后三个在多菌素培养中降解多菌灵。

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