好氧颗粒污泥微生物群对生物量周期性损失的抗性

IF 5.9 Q1 MICROBIOLOGY
Raquel Liébana , Oskar Modin , Frank Persson , Malte Hermansson , Britt-Marie Wilén
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引用次数: 0

摘要

颗粒污泥是一种用于污水处理的生物膜工艺,目前正在世界范围内实施。了解扰动如何影响微生物群落和反应器的性能是很重要的。在这里,用驯化污泥接种两个乙酸盐补料的重复反应器和反应器性能,并对颗粒污泥微生物群落的演替进行了149天的研究。在此期间,通过周期性地去除一半的反应器生物质,随后增加食物与微生物(F/M)的比率,挑战微生物群落。多样性分析和零模型表明,总体而言,微生物群落对干扰具有抵抗力,观察到对聚磷酸盐积累和反硝化微生物群落及其相关反应器功能的一些轻微影响。群落更替是由漂移和随机颗粒损失驱动的,随机性是群落聚集的主导生态过程。这些结果证明了好氧颗粒污泥法是一种稳健的废水处理系统。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Resistance of aerobic granular sludge microbiomes to periodic loss of biomass

Resistance of aerobic granular sludge microbiomes to periodic loss of biomass

Resistance of aerobic granular sludge microbiomes to periodic loss of biomass

Resistance of aerobic granular sludge microbiomes to periodic loss of biomass

Granular sludge is a biofilm process used for wastewater treatment which is currently being implemented worldwide. It is important to understand how disturbances affect the microbial community and performance of reactors. Here, two acetate-fed replicate reactors were inoculated with acclimatized sludge and the reactor performance, and the granular sludge microbial community succession were studied for 149 days. During this time, the microbial community was challenged by periodically removing half of the reactor biomass, subsequently increasing the food-to-microorganism (F/M) ratio. Diversity analysis together with null models show that overall, the microbial communities were resistant to the disturbances, observing some minor effects on polyphosphate-accumulating and denitrifying microbial communities and their associated reactor functions. Community turnover was driven by drift and random granule loss, and stochasticity was the governing ecological process for community assembly. These results evidence the aerobic granular sludge process as a robust system for wastewater treatment.

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来源期刊
Biofilm
Biofilm MICROBIOLOGY-
CiteScore
7.50
自引率
1.50%
发文量
30
审稿时长
57 days
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