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首页> 外文期刊>Bioresource Technology: Biomass, Bioenergy, Biowastes, Conversion Technologies, Biotransformations, Production Technologies >Effect of thermal pretreatment on the biogas production and microbial communities balance during anaerobic digestion of urban and industrial waste activated sludge
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Effect of thermal pretreatment on the biogas production and microbial communities balance during anaerobic digestion of urban and industrial waste activated sludge

机译：厌氧消化城市和工业废料活性污泥过程中热预处理对沼气产生和微生物群落平衡的影响

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The effect of thermal pre-treatment on the microbial populations balance and biogas production was studied during anaerobic digestion of waste activated sludge (WAS) coming from urban (US: urban sludge) and industrial (IS: industrial sludge) wastewater treatment plants (WWTP). The highest biogas yields of 0.42 l/g volatile solid (VS) removed and 0.37 l/g VS removed were obtained with urban and industrial sludge pre-treated at 120 degrees C, respectively. Fluorescent in situ hybridization (FISH) was used to quantify the major Bacteria and Archaea groups. Compared to control trails without pretreatment, Archaea content increased from 34% to 86% and from 46% to 83% for pretreated IS and US, respectively. In fact, the thermal pre-treatment of WAS enhanced the growth of hydrogen-using methanogens (HUMs), which consume rapidly the H-2 generated to allow the acetogenesis. Therefore, the stable and better performance of digesters was observed involving the balance and syntrophic associations between the different microbial populations. (C) 2016 Elsevier Ltd. All rights reserved.
机译：在厌氧消化来自城市（美国：城市污泥）和工业（IS：工业污泥）废水处理厂（WWTP）的废活性污泥（WAS）的过程中，研究了热预处理对微生物种群平衡和沼气产生的影响。 。分别在120摄氏度下进行预处理的城市污泥和工业污泥获得的最高沼气产量分别为0.42 l / g挥发性固体（VS）和0.37 l / g VS去除。荧光原位杂交（FISH）用于量化主要细菌和古细菌群体。与未经预处理的对照相比，经预处理的IS和US的古生菌含量分别从34％增加到86％和从46％增加到83％。实际上，WAS的热预处理促进了使用氢的产甲烷菌（HUM）的生长，该产甲烷菌会迅速消耗生成的H-2以允许产乙酸。因此，观察到了消化器的稳定和更好的性能，其中涉及不同微生物种群之间的平衡和营养关系。 （C）2016 Elsevier Ltd.保留所有权利。

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