Identification of factors affecting removal of antibiotic resistance genes in full-scale anaerobic digesters treating organic solid wastes

Damtie, Mekdimu Mezemir; Lee, Jangwoo; Shin, Jingyeong; Shin, Seung Gu; Son, Hee-Jong; Wang, Jinhua; Kim, Young Mo

doi:10.1016/j.biortech.2022.126929

Cited by 8 publications

(1 citation statement)

References 42 publications

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“…In particular, tetG , tetH , tetM , tetQ , tetX , and intl1 were completely removed in the two-stage AD. More recently, Damtie et al ( 2022 ) compared different operational factors including temperature, configuration, SRT, and operation mode in AD of different substrates to investigate ARG removal. The results demonstrated that digesters’ configuration (single- vs two-stage) and other operating parameters have a higher effect on ARG abundances than substrate types.…”

Section: Factors Affecting the Fate Of Args In Ad Processesmentioning

confidence: 99%

An overview of the occurrence, impact of process parameters, and the fate of antibiotic resistance genes during anaerobic digestion processes

Pourrostami Niavol,

Bordoloi,

Suri

2024

Environ Sci Pollut Res

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Antibiotic resistance genes (ARGs) have emerged as a significant global health threat, contributing to fatalities worldwide. Wastewater treatment plants (WWTPs) and livestock farms serve as primary reservoirs for these genes due to the limited efficacy of existing treatment methods and microbial adaptation to environmental stressors. Anaerobic digestion (AD) stands as a prevalent biological treatment for managing sewage sludge and manure in these settings. Given the agricultural utility of AD digestate as biofertilizers, understanding ARGs’ fate within AD processes is essential to devise effective mitigation strategies. However, understanding the impact of various factors on ARGs occurrence, dissemination, and fate remains limited. This review article explores various AD treatment parameters and correlates to various resistance mechanisms and hotspots of ARGs in the environment. It further evaluates the dissemination and occurrence of ARGs in AD feedstocks and provides a comprehensive understanding of the fate of ARGs in AD systems. This review explores the influence of key AD parameters such as feedstock properties, pretreatments, additives, and operational strategies on ARGs. Results show that properties such as high solid content and optimum co-digestion ratios can enhance ARG removal, while the presence of heavy metals, microplastics, and antibiotics could elevate ARG abundance. Also, operational enhancements, such as employing two-stage digestion, have shown promise in improving ARG removal. However, certain pretreatment methods, like thermal hydrolysis, may exhibit a rebounding effect on ARG levels. Overall, this review systematically addresses current challenges and offers future perspectives associated with the fate of ARGs in AD systems. Graphical Abstract

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Section: Factors Affecting the Fate Of Args In Ad Processesmentioning

confidence: 99%