Current perspectives on microalgae and extracellular polymers for reducing antibiotic resistance genes in livestock wastewater

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

Bioresource Technology Pub Date : 2025-05-03 DOI:10.1016/j.biortech.2025.132622

Xiaoyu Xu , Yuang Cao , Suli Zhi , Khinkhin Phyu , Han Wang , Jiahua Liu , Cheryl Marie Cordeiro , Erik Sindhøj , Keqiang Zhang , Run Zhao

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Abstract

Antibiotic resistance genes (ARGs) in livestock wastewater resulting from excessive antibiotics used in animal farming pose significant environmental and public health risks. Conventional treatment methods are often costly, inefficient, and may inadvertently promote ARG transmission. Microalgae, with their long genetic distance from bacteria and strong ability to utilize wastewater nutrients, offer a sustainable solution for ARG mitigation. This review studied the abundance and characterization of ARGs in livestock wastewater, highlighted microalgal-based removal mechanisms of ARGs, including phagocytosis, competition, and absorption by extracellular polymeric substances (EPS), and explored factors influencing their efficacy. Notably, the microalgae-EPS system reduced ARGs by 0.62–3.00 log, demonstrating significant potential in wastewater treatment. Key challenges, such as optimizing algal species, understanding EPS-ARG interactions, targeted reduction of host bacteria, and scaling technologies, were discussed. This work provides critical insights for advancing microalgal-based strategies for ARG removal, promoting environmentally friendly and efficient wastewater management.

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微藻和胞外聚合物在减少畜禽废水中抗生素抗性基因方面的研究进展

畜牧业中过量使用抗生素所产生的牲畜废水中的抗生素耐药基因（ARGs）构成了重大的环境和公共卫生风险。常规治疗方法往往成本高昂、效率低下，并可能在无意中促进ARG的传播。微藻与细菌的遗传距离长，利用废水养分的能力强，为减缓ARG提供了可持续的解决方案。本文综述了畜禽废水中ARGs的丰度和特征，重点介绍了微藻对ARGs的去除机制，包括吞噬、竞争和细胞外聚合物（EPS）的吸收，并探讨了影响其去除效果的因素。值得注意的是，微藻- eps系统减少了0.62-3.00 log的ARGs，显示了在废水处理中的巨大潜力。讨论了优化藻类种类、了解EPS-ARG相互作用、靶向减少宿主细菌和缩放技术等关键挑战。这项工作为推进基于微藻的ARG去除策略，促进环境友好和高效的废水管理提供了重要见解。

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.