Deciphering nitrogen-driven microbial succession in an anaerobic membrane bioreactor-coupled A2/O ecological system for the remediation of industrial swine wastewater

文献类型： 外文期刊

第一作者： Huang, Jing

作者： Huang, Jing;Wu, Feilong;Xiao, Yanchun;Ye, Meifeng;Wu, Xiaomei;Xu, Qingxian;Chen, Han;Chen, Han;Chen, Han

作者机构：

关键词： Anoxic/aerobic process; High-density polyethylene membrane-based anaerobic reactor; Microbial community; Nitrogen removal; Oxidation pond; Swine wastewater

期刊名称：SCIENTIFIC REPORTS （ 影响因子：3.9； 五年影响因子：4.3 ）

ISSN： 2045-2322

年卷期： 2025 年 15 卷 1 期

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收录情况： SCI

摘要： Rapid expansion of industrial pig farming has intensified existing challenges in the management of nutrient-rich wastewater, characterized by high organic loads (chemical oxygen demand (COD): 15,000-30,000 mg/L) and ammonium nitrogen (NH4+-N): 800-2,500 mg/L) concentrations. In this study, an integrated treatment system with a combination of a high-density polyethylene (HDPE) membrane-based anaerobic membrane bioreactor and an anoxic/aerobic/oxidation pond (A2/O) was developed for swine wastewater remediation. The system achieved exceptional remediation efficiency, removing 99.4, 99.5, 95.4, 92.8, and 97.9% of COD, biochemical oxygen demand (BOD), NH4+-N, total phosphorus (TP), and suspended solids (SS), respectively, with the anoxic and aerobic (A2) phases contributing to removal of 62.5, 60.9, 80.9, 94.6% of COD, BOD, TP, and SS, respectively. Microbial community analysis revealed process-specific dynamics, including Firmicutes enrichment (8.52 +/- 3.33 to 10.81 +/- 0.39%) in anaerobic stages and Nitrosomonas dominance (2.38 +/- 0.21%) during nitrification. The HDPE membrane-based bioreactor performed effectively under high organic loading rates (5-8 kg CODm-3day-1), whereas the A2/O system optimized nutrient cycling through synchronized nitrification-denitrification (dissolved oxygen: 2.0-3.5 mg/L). In this study, we establish a scalable framework for the treatment of industrial swine wastewater by combining engineered infrastructure with the principles of microbial ecology to address conventional pollutants.

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