藻-细菌颗粒污泥系统中群落聚集与污染物去除的耦合机制。

IF 9 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING

Bioresource Technology Pub Date : 2025-12-01 Epub Date: 2025-08-06 DOI:10.1016/j.biortech.2025.133122

Rushuo Yang, Zhe Liu, Yongjun Liu, Zhuangzhuang Yang, Zhu Wang, Yuhang Zhang, Jie Lei, Tianyu Han, Jiaxuan Wang, Zhihua Li

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引用次数: 0

摘要

本研究对比评价了絮凝污泥转化ABGS （AS_ABGS）和好氧颗粒污泥转化ABGS （AGS_ABGS）两种培养模式下藻菌颗粒污泥（ABGS）的去污性能和微生物群落机制。结果表明，AS_ABGS对污染物的去除率（COD: 92.2 %,TN: 82.1 %,TP: 61.5 %）优于AGS_ABGS （COD: 96.3 %,TN: 75.1 %,TP: 53.3 %）。微生物群落分析表明，确定性组装主导了AS_ABGS，缩小了生态位，增强了去氮磷类群的功能专门化。AS_ABGS表现出更高的模块化、稳健性和更强的阳性藻菌相互作用（52.32 %）。相反，AGS_ABGS的随机组装产生了较弱的相互作用（50.45 %）。宏基因组学证实，AS_ABGS富集的N/P代谢基因（amo, acc）可能由Thauera， Micavibrio和Aquisediminimonas驱动，而AGS_ABGS倾向于Amaricoccus和Rhodovulum，但N/P基因丰度较低。本研究强调了功能基因介导的藻-细菌生态相互作用对ABGS去污效率的影响，为该方法的进一步发展提供了有价值的见解。

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Coupling mechanisms of community assembly and pollutant removal in algal-bacterial granular sludge systems.

This study comparatively assessed algal-bacterial granular sludge (ABGS) decontamination performance and microbial community mechanisms under two cultivation modes: flocculated sludge transformed into ABGS (AS_ABGS) and aerobic granular sludge transformed into ABGS (AGS_ABGS). The results indicated that, AS_ABGS achieved superior pollutant removal (COD: 92.2 %, TN: 82.1 %, TP: 61.5 %) versus AGS_ABGS (COD: 96.3 %, TN: 75.1 %, TP: 53.3 %). Microbial community analysis revealed deterministic assembly dominated AS_ABGS, narrowing niches, and enhancing functional specialization of N/P-removing taxa. AS_ABGS exhibited higher modularity, robustness, and stronger positive algal-bacterial interactions (52.32 %). Conversely, stochastic assembly in AGS_ABGS yielded weaker interactions (50.45 %). Metagenomics confirmed AS_ABGS enriched N/P metabolic genes (amo, acc) may be driven by Thauera, Micavibrio, and Aquisediminimonas, while AGS_ABGS favored Amaricoccus and Rhodovulum but showed lower N/P gene abundance. This study highlights the effect of algal-bacterial ecological interactions mediated by functional genes on the decontamination efficiency of ABGS and provides valuable insights for advancing this method.

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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.