Salinity stress and recovery of the algal-bacterial granular sludge (ABGS) system under the influence of different N-acyl-homoserine lactones (AHLs)

IF 9.7 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING

Bioresource Technology Pub Date : 2024-12-21 DOI:10.1016/j.biortech.2024.132003

Yanfang Chen , Lu Li , Wenbin Guo , Dao Zhou , Rongfan Chen , Dongbo Wang , Junfeng Su , Hongyu Wang

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Abstract

The algal-bacterial granular sludge (ABGS) system was established to explore the effect of 1% salinity condition, determine the recovery process following salinity disturbance, and probe the impacts of two N-acyl-homoserine lactones (AHLs) on the system. Exposure to 1% salinity led to the reduction of filaments and an increase in TB-EPS contents within the ABGS system. The phosphorus removal performance of the ABGS system severely decreased at 1% salinity and did not restore fully during the subsequent recovery stage, demonstrating that salinity stress induced long-term inhibition. Oligotrophic bacteria were found to be enriched at 1% salinity, indicating the self-adaptation of the ABGS system against salinity stress. The addition of AHLs helped mitigate the inhibitory effect of salinity stress. Specifically, C6-HSL slowed down the decline in microbial diversity, while 3-oxo-C12-HSL weakened the inhibition on microalgae growth. This study provided novel insights into the effects of salinity stress and AHLs on ABGS systems.

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藻类-细菌颗粒污泥（ABGS）系统在不同 N-酰基-高丝氨酸内酯（AHL）影响下的盐度胁迫和恢复。

建立藻-细菌颗粒污泥（ABGS）系统，探讨1%盐度条件对系统的影响，确定盐度扰动后的回收过程，并探讨两种n -酰基高丝氨酸内酯（AHLs）对系统的影响。暴露于1%盐度下导致ABGS系统中细丝减少，TB-EPS含量增加。当盐度为1%时，ABGS系统的除磷性能严重下降，并没有在随后的恢复阶段完全恢复，这表明盐度胁迫导致了长期抑制。低营养细菌在1%盐度下富集，表明ABGS系统对盐度胁迫具有自适应能力。ahl的加入有助于减轻盐胁迫的抑制作用。其中，C6-HSL减缓了微生物多样性的下降，而3-oxo-C12-HSL则减弱了对微藻生长的抑制作用。该研究为盐度胁迫和ahl对ABGS系统的影响提供了新的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.