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Fazzino F, Frontera P, Malara A, Pedullà A, Calabrò PS. Effects of carbon-based conductive materials on semi-continuous anaerobic co-digestion of organic fraction of municipal solid waste and waste activated sludge. CHEMOSPHERE 2024; 357:142077. [PMID: 38643843 DOI: 10.1016/j.chemosphere.2024.142077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2024] [Revised: 03/25/2024] [Accepted: 04/17/2024] [Indexed: 04/23/2024]
Abstract
Organic fraction of municipal solid waste (OFMSW) and waste activated sludge (WAS) are the most produced organic waste streams in urban centres. Their anaerobic co-digestion (AcoD) allows to generate methane (CH4) and digestate employable as renewable energy source and soil amendment, respectively, fully in accordance with circular bioeconomy principles. However, the widespread adoption of such technology is limited by relatively low CH4 yields that fail to bridge the gap between benefits and costs. Among strategies to boost AcoD of OFMSW and WAS, use of conductive materials (CMs) to promote interspecies electron transfer has gained increasing attention. This paper presents one of the few experimental attempts of investigating the effects of four different carbon(C)-based CMs (i.e., granular activated carbon - GAC, graphite - GR, graphene oxide - GO, and carbon nanotubes - CNTs) separately added in semi-continuous AcoD of OFMSW and thickened WAS. The presence of C-based CMs has been observed to improve CH4 yield of the control process. Specifically, after 63 days of operation (concentrations of GAC and GR of 10.0 g/L and of GO and CNTs of 0.2 g/L), 0.186 NL/gVS, 0.191 NL/gVS, 0.203 NL/gVS, and 0.195 NL/gVS of CH4 were produced in reactors supplemented with GAC, GR, GO, and CNTs, respectively, compared to 0.177 NL/gVS produced in the control process. Likewise, at the end of the test (i.e., after 105 days at concentrations of C-based CMs half of the initial ones), CH4 yields were 0.193 NL/gVS, 0.201 NL/gVS, 0.211 NL/gVS, and 0.206 NL/gVS in reactors supplemented with GAC, GR, GO, and CNTs, respectively, compared to 0.186 NL/gVS of the control process. Especially with regard to GR, GO, and CNTs, results obtained in the present study represent a significant advance of the knowledge on the effects of such C-based CMs to realistic and scalable AD process conditions respect to previous literature.
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Affiliation(s)
- Filippo Fazzino
- Department of Civil Engineering and Architecture, University of Catania, Viale A. Doria, 6, Catania, Italy
| | - Patrizia Frontera
- Department of Civil, Energy, Environmental and Materials Engineering, Mediterranea University of Reggio Calabria, Via Zehender, loc. Feo di Vito, 89122, Reggio Calabria, Italy
| | - Angela Malara
- Department of Civil, Energy, Environmental and Materials Engineering, Mediterranea University of Reggio Calabria, Via Zehender, loc. Feo di Vito, 89122, Reggio Calabria, Italy
| | - Altea Pedullà
- Department of Civil, Energy, Environmental and Materials Engineering, Mediterranea University of Reggio Calabria, Via Zehender, loc. Feo di Vito, 89122, Reggio Calabria, Italy
| | - Paolo S Calabrò
- Department of Civil, Energy, Environmental and Materials Engineering, Mediterranea University of Reggio Calabria, Via Zehender, loc. Feo di Vito, 89122, Reggio Calabria, Italy.
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Pourrostami Niavol K, Bordoloi A, Suri R. An overview of the occurrence, impact of process parameters, and the fate of antibiotic resistance genes during anaerobic digestion processes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:41745-41774. [PMID: 38853230 PMCID: PMC11219439 DOI: 10.1007/s11356-024-33844-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Accepted: 05/24/2024] [Indexed: 06/11/2024]
Abstract
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.
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Affiliation(s)
- Kasra Pourrostami Niavol
- Department of Civil and Environmental Engineering, Temple University, Philadelphia, PA, 19122, USA
| | - Achinta Bordoloi
- Department of Civil and Environmental Engineering, Temple University, Philadelphia, PA, 19122, USA
| | - Rominder Suri
- Department of Civil and Environmental Engineering, Temple University, Philadelphia, PA, 19122, USA.
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3
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Alam M, Dhar BR. Boosting thermophilic anaerobic digestion with conductive materials: Current outlook and future prospects. CHEMOSPHERE 2023; 343:140175. [PMID: 37714472 DOI: 10.1016/j.chemosphere.2023.140175] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 08/15/2023] [Accepted: 09/12/2023] [Indexed: 09/17/2023]
Abstract
Thermophilic anaerobic digestion (TAD) can provide superior process kinetics, higher methane yields, and more pathogen destruction than mesophilic anaerobic digestion (MAD). However, the broader application of TAD is still very limited, mainly due to process instabilities such as the accumulation of volatile fatty acids and ammonia inhibition in the digesters. An emerging technique to overcome the process disturbances in TAD and enhance the methane production rate is to add conductive materials (CMs) to the digester. Recent studies have revealed that CMs can promote direct interspecies electron transfer (DIET) among the microbial community, increasing the TAD performance. CMs exhibited a high potential for alleviating the accumulation of volatile fatty acids and inhibition caused by high ammonia levels. However, the types, properties, sources, and dosage of CMs can influence the process outcomes significantly, along with other process parameters such as the organic loading rates and the type of feedstocks. Therefore, it is imperative to critically review the recent research to understand the impacts of using different CMs in TAD. This review paper discusses the types and properties of CMs applied in TAD and the mechanisms of how they influence methanogenesis, digester start-up time, process disturbances, microbial community, and biogas desulfurization. The engineering challenges for industrial-scale applications and environmental risks were also discussed. Finally, critical research gaps have been identified to provide a framework for future research.
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Affiliation(s)
- Monisha Alam
- Civil and Environmental Engineering, University of Alberta, 116 Street NW, Edmonton, AB, T6G 1H9, Canada
| | - Bipro Ranjan Dhar
- Civil and Environmental Engineering, University of Alberta, 116 Street NW, Edmonton, AB, T6G 1H9, Canada.
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4
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Wu L, Shen Z, Zhou Y, Zuo J. Stimulating anaerobic digestion to degrade recalcitrant organic pollutants: Potential role of conductive materials-led direct interspecies electron transfer. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 344:118337. [PMID: 37343473 DOI: 10.1016/j.jenvman.2023.118337] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 05/26/2023] [Accepted: 06/04/2023] [Indexed: 06/23/2023]
Abstract
This review aims to provide a comprehensive understanding of the potential of CMs-dominated DIET in the degradation of recalcitrant organic pollutants in AD. The review covers the mechanisms and efficiencies of recalcitrant organic pollutant degradation by CMs-dominated DIET, the comparison of degradation pathways between DIET and chemical treatment, recent insights on DIET-enhanced degradation, and the evaluation of the potential and future development of CMs-dominated DIET. The review emphasizes the importance of coupled syntrophic microorganisms, electron flux, and physicochemical properties of CMs in enhancing the degradation performance of AD. Additionally, it highlights the advantages of DIET-led syntrophic metabolism over traditional oxidation technologies in terms of environmental friendliness and efficiency. Finally, the review acknowledges the potential risks associated with introducing CMs into AD systems and provides guidance for waste treatment and energy recovery.
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Affiliation(s)
- Linjun Wu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environment Sciences, Beijing, 100012, China; Research Center of Environmental Pollution Control Engineering Technology, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Zhiqiang Shen
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environment Sciences, Beijing, 100012, China; Research Center of Environmental Pollution Control Engineering Technology, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
| | - Yuexi Zhou
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environment Sciences, Beijing, 100012, China; Research Center of Environmental Pollution Control Engineering Technology, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
| | - Jiane Zuo
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China; Tsinghua Shenzhen International Graduate School, Shenzhen, 518055, China.
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5
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Mohammad Mirsoleimani Azizi S, Zakaria BS, Haffiez N, Kumar A, Ranjan Dhar B. Pilot-scale investigation of conductive carbon cloth amendment for enhancing high-solids anaerobic digestion and mitigating antibiotic resistance. BIORESOURCE TECHNOLOGY 2023; 385:129411. [PMID: 37394042 DOI: 10.1016/j.biortech.2023.129411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 06/23/2023] [Accepted: 06/27/2023] [Indexed: 07/04/2023]
Abstract
This study examined the effectiveness of introducing conductive carbon cloth into a pilot-scale high-solids anaerobic digestion (HSAD) system. Adding carbon cloth increased methane production by 22 % and improved the maximum methane production rate by 39 %. Microbial community characterization indicated a possible direct interspecies electron transfer-based syntrophic association among microbes. Using carbon cloth also enhanced microbial richness, diversity, and evenness. Carbon cloth effectively reduced the total abundance of antibiotic resistance genes (ARGs) by 44.6 %, mainly by inhibiting horizontal gene transfer, as shown by the significant decrease in the relative abundance of integron genes (particularly intl1). The multivariate analysis further demonstrated strong correlations of intl1 with most of the targeted ARGs. These findings suggest that carbon cloth amendment can promote efficient methane production and attenuate the spread of ARGs in HSAD systems.
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Affiliation(s)
| | - Basem S Zakaria
- Civil and Environmental Engineering, University of Alberta, Edmonton, AB, Canada
| | - Nervana Haffiez
- Civil and Environmental Engineering, University of Alberta, Edmonton, AB, Canada
| | - Amit Kumar
- Mechanical Engineering, University of Alberta, Edmonton, AB, Canada
| | - Bipro Ranjan Dhar
- Civil and Environmental Engineering, University of Alberta, Edmonton, AB, Canada.
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6
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Ovis-Sánchez JO, Perera-Pérez VD, Buitrón G, Quintela-Baluja M, Graham DW, Morales-Espinosa R, Carrillo-Reyes J. Exploring resistomes and microbiomes in pilot-scale microalgae-bacteria wastewater treatment systems for use in low-resource settings. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 882:163545. [PMID: 37080313 DOI: 10.1016/j.scitotenv.2023.163545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 02/17/2023] [Accepted: 04/13/2023] [Indexed: 05/03/2023]
Abstract
Antibiotic resistance genes (ARGs) released into the environment are an emerging human and environmental health concern, including ARGs spread in wastewater treatment effluents. In low-to-middle income countries (LMICs), an alternate wastewater treatment option instead of conventional systems are low-energy, high-rate algal ponds (HRAP) that use microalgae-bacteria aggregates (MABA) for waste degradation. Here we studied the robustness of ARG removal in MABA-based pilot-scale outdoor systems for 140 days of continuous operation. The HRAP system successfully removed 73 to 88 % chemical oxygen demand and up to 97.4 % ammonia, with aggregate size increasing over operating time. Fourteen ARG classes were identified in the HRAP influent, MABA, and effluent using metagenomics, with the HRAP process reducing total ARG abundances by up to 5-fold from influent to effluent. Parallel qPCR analyses showed the HRAP system significantly reduced exemplar ARGs (p < 0.05), with 1.2 to 4.9, 2.7 to 6.3, 0 to 1.5, and 1.2 to 4.8 log-removals for sul1, tetQ, blaKPC, and intl1 genes, respectively. Sequencing of influent, effluent and MABAs samples showed associated microbial communities differed significantly, with influent communities by Enterobacteriales (clinically relevant ARGs carrying bacteria), which were less evident in MABA and effluent. In this sense, such bacteria might be excluded from MABA due to their good settling properties and the presence of antimicrobial peptides. Microalgae-bacteria treatment systems steadily reduced ARGs from wastewater during operation time, using sunlight as the energetic driver, making them ideal for use in LMIC wastewater treatment applications.
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Affiliation(s)
- Julián O Ovis-Sánchez
- Laboratorio de Investigación en Procesos Avanzados de Tratamiento de Aguas, Unidad Académica Juriquilla, Instituto de Ingeniería, Universidad Nacional Autónoma de México, Querétaro 76230, Mexico
| | - Victor D Perera-Pérez
- Laboratorio de Investigación en Procesos Avanzados de Tratamiento de Aguas, Unidad Académica Juriquilla, Instituto de Ingeniería, Universidad Nacional Autónoma de México, Querétaro 76230, Mexico
| | - Germán Buitrón
- Laboratorio de Investigación en Procesos Avanzados de Tratamiento de Aguas, Unidad Académica Juriquilla, Instituto de Ingeniería, Universidad Nacional Autónoma de México, Querétaro 76230, Mexico
| | - Marcos Quintela-Baluja
- School of Engineering, Newcastle University, Cassie Building, Newcastle upon Tyne NE1 7RU, UK
| | - David W Graham
- School of Engineering, Newcastle University, Cassie Building, Newcastle upon Tyne NE1 7RU, UK
| | - Rosario Morales-Espinosa
- Laboratorio de Genómica Bacteriana, Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México 04510, Mexico
| | - Julián Carrillo-Reyes
- Laboratorio de Investigación en Procesos Avanzados de Tratamiento de Aguas, Unidad Académica Juriquilla, Instituto de Ingeniería, Universidad Nacional Autónoma de México, Querétaro 76230, Mexico.
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Mohammad Mirsoleimani Azizi S, Zakaria BS, Haffiez N, Ranjan Dhar B. Granular activated carbon remediates antibiotic resistance propagation and methanogenic inhibition induced by polystyrene nanoplastics in sludge anaerobic digestion. BIORESOURCE TECHNOLOGY 2023; 377:128938. [PMID: 36948429 DOI: 10.1016/j.biortech.2023.128938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/14/2023] [Accepted: 03/18/2023] [Indexed: 06/18/2023]
Abstract
Nano/microplastics (NPs/MPs) in sewage sludge can induce oxidative stress to the anaerobic digestion (AD) and also proliferate antibiotic resistance genes (ARGs). Recently, granular activated carbon (GAC) has been used as an additive to enhance methane production in AD via direct interspecies electron transfer (DIET); however, its impact on AD exposed to NPs/MPs is yet to be studied. This study examined the effect of GAC (5 and 15 g/L) on sludge AD exposed to 150 µg/L of polystyrene nanoplastics (PsNPs). PsNPs decreased methane yield by 32.3% due to elevated levels of reactive oxygen species. However, GAC addition counteracted this adverse effect and improved methane production, attributed to the potential enrichment of DIET-active microbes and the adsorption of PsNPs by GAC. Moreover, GAC reduced the total abundance of ARGs, which was increased by PsNPs exposure. Thus, GAC can provide dual benefits in mitigating methanogenic inhibition caused by PsNPs and ARG spread.
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Affiliation(s)
| | - Basem S Zakaria
- Civil and Environmental Engineering, University of Alberta, 116 Street NW, Edmonton, AB T6G 1H9, Canada
| | - Nervana Haffiez
- Civil and Environmental Engineering, University of Alberta, 116 Street NW, Edmonton, AB T6G 1H9, Canada
| | - Bipro Ranjan Dhar
- Civil and Environmental Engineering, University of Alberta, 116 Street NW, Edmonton, AB T6G 1H9, Canada.
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8
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Zubair M, Li Z, Zhu R, Wang J, Liu X, Liu X. The Antibiotics Degradation and Its Mechanisms during the Livestock Manure Anaerobic Digestion. Molecules 2023; 28:molecules28104090. [PMID: 37241831 DOI: 10.3390/molecules28104090] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 05/04/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023] Open
Abstract
Antibiotics are administered to livestock at subtherapeutic levels to promote growth, and their degradation in manure is slow. High antibiotic concentrations can inhibit bacterial activity. Livestock excretes antibiotics via feces and urine, leading to their accumulation in manure. This can result in the propagation of antibiotic-resistant bacteria and antibiotic resistance genes (ARGs). Anaerobic digestion (AD) manure treatment technologies are gaining popularity due to their ability to mitigate organic matter pollution and pathogens, and produce methane-rich biogas as renewable energy. AD is influenced by multiple factors, including temperature, pH, total solids (TS), substrate type, organic loading rate (OLR), hydraulic retention time (HRT), intermediate substrates, and pre-treatments. Temperature plays a critical role, and thermophilic AD has been found to be more effective in reducing ARGs in manure compared to mesophilic AD, as evidenced by numerous studies. This review paper investigates the fundamental principles of process parameters affecting the degradation of ARGs in anaerobic digestion. The management of waste to mitigate antibiotic resistance in microorganisms presents a significant challenge, highlighting the need for effective waste management technologies. As the prevalence of antibiotic resistance continues to rise, urgent implementation of effective treatment strategies is necessary.
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Affiliation(s)
- Muhammad Zubair
- Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, No. 202 Industry North Road, Jinan 250100, China
- Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China
| | - Zhaojun Li
- Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, No. 202 Industry North Road, Jinan 250100, China
| | - Rongsheng Zhu
- Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, No. 202 Industry North Road, Jinan 250100, China
| | - Jiancai Wang
- Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, No. 202 Industry North Road, Jinan 250100, China
| | - Xinghua Liu
- Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, No. 202 Industry North Road, Jinan 250100, China
| | - Xiayan Liu
- Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, No. 202 Industry North Road, Jinan 250100, China
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Nnorom MA, Saroj D, Avery L, Hough R, Guo B. A review of the impact of conductive materials on antibiotic resistance genes during the anaerobic digestion of sewage sludge and animal manure. JOURNAL OF HAZARDOUS MATERIALS 2023; 446:130628. [PMID: 36586329 DOI: 10.1016/j.jhazmat.2022.130628] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 12/12/2022] [Accepted: 12/16/2022] [Indexed: 06/17/2023]
Abstract
The urgent need to reduce the environmental burden of antibiotic resistance genes (ARGs) has become even more apparent as concerted efforts are made globally to tackle the dissemination of antimicrobial resistance. Concerning levels of ARGs abound in sewage sludge and animal manure, and their inadequate attenuation during conventional anaerobic digestion (AD) compromises the safety of the digestate, a nutrient-rich by-product of AD commonly recycled to agricultural land for improvement of soil quality. Exogenous ARGs introduced into the natural environment via the land application of digestate can be transferred from innocuous environmental bacteria to clinically relevant bacteria by horizontal gene transfer (HGT) and may eventually reach humans through food, water, and air. This review, therefore, discusses the prospects of using carbon- and iron-based conductive materials (CMs) as additives to mitigate the proliferation of ARGs during the AD of sewage sludge and animal manure. The review spotlights the core mechanisms underpinning the influence of CMs on the resistome profile, the steps to maximize ARG attenuation using CMs, and the current knowledge gaps. Data and information gathered indicate that CMs can profoundly reduce the abundance of ARGs in the digestate by easing selective pressure on ARGs, altering microbial community structure, and diminishing HGT.
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Affiliation(s)
- Mac-Anthony Nnorom
- Centre for Environmental Health and Engineering (CEHE), Department of Civil and Environmental Engineering, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - Devendra Saroj
- Centre for Environmental Health and Engineering (CEHE), Department of Civil and Environmental Engineering, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - Lisa Avery
- The James Hutton Institute, Craigiebuckler, Aberdeen AB15 8QH, United Kingdom
| | - Rupert Hough
- The James Hutton Institute, Craigiebuckler, Aberdeen AB15 8QH, United Kingdom
| | - Bing Guo
- Centre for Environmental Health and Engineering (CEHE), Department of Civil and Environmental Engineering, University of Surrey, Guildford GU2 7XH, United Kingdom.
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10
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Haffiez N, Chung TH, Zakaria BS, Shahidi M, Mezbahuddin S, Maal-Bared R, Dhar BR. Exploration of machine learning algorithms for predicting the changes in abundance of antibiotic resistance genes in anaerobic digestion. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 839:156211. [PMID: 35623518 DOI: 10.1016/j.scitotenv.2022.156211] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 04/29/2022] [Accepted: 05/20/2022] [Indexed: 06/15/2023]
Abstract
The land application of digestate from anaerobic digestion (AD) is considered a significant route for transmitting antibiotic resistance genes (ARGs) and mobile genetic elements (MGEs) to ecosystems. To date, efforts towards understanding complex non-linear interactions between AD operating parameters with ARG/MGE abundances rely on experimental investigations due to a lack of mechanistic models. Herein, three different machine learning (ML) algorithms, Random Forest (RF), eXtreme Gradient Boosting (XGBoost), and Artificial Neural Network (ANN), were compared for their predictive capacities in simulating ARG/MGE abundance changes during AD. The models were trained and cross-validated using experimental data collected from 33 published literature. The comparison of model performance using coefficients of determination (R2) and root mean squared errors (RMSE) indicated that ANN was more reliable than RF and XGBoost. The mode of operation (batch/semi-continuous), co-digestion of food waste and sewage sludge, and residence time were identified as the three most critical features in predicting ARG/MGE abundance changes. Moreover, the trained ANN model could simulate non-linear interactions between operational parameters and ARG/MGE abundance changes that could be interpreted intuitively based on existing knowledge. Overall, this study demonstrates that machine learning can enable a reliable predictive model that can provide a holistic optimization tool for mitigating the ARG/MGE transmission potential of AD.
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Affiliation(s)
- Nervana Haffiez
- Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Tae Hyun Chung
- Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Basem S Zakaria
- Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | | | | | | | - Bipro Ranjan Dhar
- Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada.
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11
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Deng Y, Zhang K, Zou J, Li X, Wang Z, Hu C. Electron shuttles enhanced the removal of antibiotics and antibiotic resistance genes in anaerobic systems: A review. Front Microbiol 2022; 13:1004589. [PMID: 36160234 PMCID: PMC9490129 DOI: 10.3389/fmicb.2022.1004589] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 08/19/2022] [Indexed: 11/13/2022] Open
Abstract
The environmental and epidemiological problems caused by antibiotics and antibiotic resistance genes have attracted a lot of attention. The use of electron shuttles based on enhanced extracellular electron transfer for anaerobic biological treatment to remove widespread antibiotics and antibiotic resistance genes efficiently from wastewater or organic solid waste is a promising technology. This paper reviewed the development of electron shuttles, described the mechanism of action of different electron shuttles and the application of enhanced anaerobic biotreatment with electron shuttles for the removal of antibiotics and related genes. Finally, we discussed the current issues and possible future directions of electron shuttle technology.
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12
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Liang J, Luo L, Wong JWC, He D. Recent advances in conductive materials amended anaerobic co-digestion of food waste and municipal organic solid waste: Roles, mechanisms, and potential application. BIORESOURCE TECHNOLOGY 2022; 360:127613. [PMID: 35840024 DOI: 10.1016/j.biortech.2022.127613] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 07/06/2022] [Accepted: 07/07/2022] [Indexed: 06/15/2023]
Abstract
Recently, conductive materials (i.e., carbon-based and iron-based materials) as a feasible and attractive approach have been introduced to anaerobic co-digestion (ACoD) system for promoting its performance and stability through direct interspecies electron transfer. Owing to the key roles of conductive materials in ACoD process, it is imperative to gain a profound understanding of their specific functions and mechanisms. Here, this review critically examined the state of the art of conductive materials assisted ACoD of food waste and common municipal organic solid waste. Then, the fundamental roles of conductive materials on ACoD enhancement and the relevant mechanisms were discussed. Last, the perspectives for co-digestate treatment, reutilization, and disposal were summarized. Moreover, the main challenges to conductive materials amended ACoD in on-site application were proposed and the future remarks were put forward. Collectively, this review poses a scientific basis for the potential application of conductive materials in ACoD process in the future.
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Affiliation(s)
- Jialin Liang
- Engineering and Technology Research Center for Agricultural Land Pollution Integrated Prevention and Control of Guangdong Higher Education Institute, College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Liwen Luo
- Institute of Bioresource and Agriculture, Sino-Forest Applied Research Centre for Pearl River Delta Environment, Department of Biology, Hong Kong Baptist University, Kowloon Tong, Hong Kong SAR, China
| | - Jonathan W C Wong
- Institute of Bioresource and Agriculture, Sino-Forest Applied Research Centre for Pearl River Delta Environment, Department of Biology, Hong Kong Baptist University, Kowloon Tong, Hong Kong SAR, China; School of Technology, Huzhou University, Huzhou 311800, China.
| | - Di He
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
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13
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Haffiez N, Chung TH, Zakaria BS, Shahidi M, Mezbahuddin S, Hai FI, Dhar BR. A critical review of process parameters influencing the fate of antibiotic resistance genes in the anaerobic digestion of organic waste. BIORESOURCE TECHNOLOGY 2022; 354:127189. [PMID: 35439559 DOI: 10.1016/j.biortech.2022.127189] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 04/13/2022] [Accepted: 04/15/2022] [Indexed: 06/14/2023]
Abstract
The overuse and inappropriate disposal of antibiotics raised severe public health risks worldwide. Specifically, the incomplete antibiotics metabolism in human and animal bodies contributes to the significant release of antibiotics into the natural ecosystems and the proliferation of antibiotic-resistant bacteria carrying antibiotic-resistant genes. Moreover, the organic feedstocks used for anaerobic digestion are often highly-rich in residual antibiotics and antibiotic-resistant genes. Hence, understanding their fate during anaerobic digestion has become a significant research focus recently. Previous studies demonstrated that various process parameters could considerably influence the propagation of the antibiotic-resistant genes during anaerobic digestion and their transmission via land application of digestate. This review article scrutinizes the influences of process parameters on antibiotic-resistant genes propagation in anaerobic digestion and the inherent fundamentals behind their effects. Based on the literature review, critical research gaps and challenges are summarized to guide the prospects for future studies.
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Affiliation(s)
- Nervana Haffiez
- Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Tae Hyun Chung
- Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Basem S Zakaria
- Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Manjila Shahidi
- 4S Analytics & Modelling Ltd., Edmonton, AB, T6W 3V6, Canada
| | | | - Faisal I Hai
- Strategic Water Infrastructure Laboratory, School of Civil, Mining and Environmental Engineering, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Bipro Ranjan Dhar
- Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada.
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14
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Zhang R, Yang S, An Y, Wang Y, Lei Y, Song L. Antibiotics and antibiotic resistance genes in landfills: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:150647. [PMID: 34597560 DOI: 10.1016/j.scitotenv.2021.150647] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 09/24/2021] [Accepted: 09/24/2021] [Indexed: 06/13/2023]
Abstract
Landfill are important reservoirs of antibiotics and antibiotic resistance genes (ARGs). They harbor diverse contaminants, such as heavy metals and persistent organic chemicals, complex microbial consortia, and anaerobic degradation processes, which facilitate the occurrence, development, and transfer of ARGs and antibiotic resistant bacteria (ARB). The main concern is that antibiotics and developed ARGs and ARB may transfer to the local environment via leachate and landfill leakage. In this paper, we provide an overview of established studies on antibiotics and ARGs in landfills, summarize the origins and distribution of antibiotics and ARGs, discuss the linkages among various antibiotics, ARGs, and bacterial communities as well as the influencing factors of ARGs, and evaluate the current treatment processes of antibiotics and ARGs. Finally, future research is proposed to fill the current knowledge gaps, which include mechanisms for the development and transmission of antibiotic resistance, as well as efficient treatment approaches for antibiotic resistance.
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Affiliation(s)
- Rui Zhang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Science, Chongqing 400714, China; University of Chinese Academy of Sciences, Beijing 101407, China
| | - Shu Yang
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Yuwei An
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Science, Chongqing 400714, China
| | - Yangqing Wang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Science, Chongqing 400714, China
| | - Yu Lei
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Science, Chongqing 400714, China
| | - Liyan Song
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Science, Chongqing 400714, China; School of resources and environmental engineering, Anhui University, Hefei 230601, China.
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15
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Varjani S, Shah AV, Vyas S, Srivastava VK. Processes and prospects on valorizing solid waste for the production of valuable products employing bio-routes: A systematic review. CHEMOSPHERE 2021; 282:130954. [PMID: 34082315 DOI: 10.1016/j.chemosphere.2021.130954] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 05/08/2021] [Accepted: 05/17/2021] [Indexed: 06/12/2023]
Abstract
Humanity is struggling against a major problem for a proper management of generated municipal solid waste. The collected waste causes natural issues like uncontrollable emission of greenhouse gases and others. Even though, escalation of waste results in minimizing the areas accessible for disposing the waste. Creating awareness in the society to use organic products like biofuels, biofertilizers and biogas is a need of an hour. Biochemical processes such as composting, vermicomposting, anaerobic digestion, and landfilling play important role in valorizing biomass and solid waste for production of biofuels, biosurfactants and biopolymer. This paper covers the details of biomass and solid waste characteristics and its composition. It is also focused to provide updated information about reutilization of biomass for value creation. Technologies and products obtained through bio-routes are discussed in current review paper together with the integrated system of solid waste management. It also covers challenges, innovations and perspectives in this field.
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Affiliation(s)
- Sunita Varjani
- Gujarat Pollution Control Board, Gandhinagar, 382 010, Gujarat, India; Sankalchand Patel Vidyadham, Sankalchand Patel University, Visnagar, 384 315, Gujarat, India.
| | - Anil V Shah
- Gujarat Pollution Control Board, Gandhinagar, 382 010, Gujarat, India; Sankalchand Patel Vidyadham, Sankalchand Patel University, Visnagar, 384 315, Gujarat, India
| | - Shaili Vyas
- Gujarat Pollution Control Board, Gandhinagar, 382 010, Gujarat, India; Kadi Sarva Vishwavidyalaya, Gandhinagar, Gujarat, 382015, India
| | - Vijay Kumar Srivastava
- Sankalchand Patel Vidyadham, Sankalchand Patel University, Visnagar, 384 315, Gujarat, India
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16
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Gurmessa B, Milanovic V, Foppa Pedretti E, Corti G, Ashworth AJ, Aquilanti L, Ferrocino I, Rita Corvaglia M, Cocco S. Post-digestate composting shifts microbial composition and degrades antimicrobial resistance genes. BIORESOURCE TECHNOLOGY 2021; 340:125662. [PMID: 34333345 DOI: 10.1016/j.biortech.2021.125662] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 07/21/2021] [Accepted: 07/23/2021] [Indexed: 06/13/2023]
Abstract
Post-digestate treatments may reduce the risk linked to Antibiotic Resistant Genes (ARGs) release with digestate direct land application. Thus, this study aimed to evaluate post-digestate composting and co-composting with biogas production feedstock (maize silage, food processing waste, and poultry litter) effect on abundance of selected ARGs: erm(B), tet(K), tet(M), tet(O), and tet(S) genes. More than 80% of all ARGs were removed after 90 days of composting but removals from co-composting were lower. Bacteroidetes, Firmicutes, and Proteobacteria dominated fresh digestate, and a network analysis indicated that these were potential hosts of ARGs. The emergence of Actinobacteria (dominant), Planctomycetes, and Verrucomicrobia phyla during composting shifted the microbial composition. Moreover, canonical correspondence analysis showed trace elements explaining 90% variations in ARGs abundance. The study illustrates significance of post-digestate composting in mitigating ARGs release, and effectiveness could be linked to shift in microbial composition and trace elements release.
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Affiliation(s)
- Biyensa Gurmessa
- Department of Agriculture, Food and Environmental Sciences, Università Politecnica delle Marche, Via Brecce Bianche 10, Ancona 60131, Italy.
| | - Vesna Milanovic
- Department of Agriculture, Food and Environmental Sciences, Università Politecnica delle Marche, Via Brecce Bianche 10, Ancona 60131, Italy
| | - Ester Foppa Pedretti
- Department of Agriculture, Food and Environmental Sciences, Università Politecnica delle Marche, Via Brecce Bianche 10, Ancona 60131, Italy
| | - Giuseppe Corti
- Department of Agriculture, Food and Environmental Sciences, Università Politecnica delle Marche, Via Brecce Bianche 10, Ancona 60131, Italy
| | - Amanda J Ashworth
- Agricultural Research Service, U.S. DEPARTMENT OF AGRICULTURE (USDA-ARS), Poultry Production and Product Safety Research Unit, 1260 W. Maple St., Fayetteville, AR 72701, USA
| | - Lucia Aquilanti
- Department of Agriculture, Food and Environmental Sciences, Università Politecnica delle Marche, Via Brecce Bianche 10, Ancona 60131, Italy
| | - Ilario Ferrocino
- Department of Agricultural, Forest, and Food Science, University of Turin, Largo Paolo Braccini 2, Grugliasco, Torino, Italy
| | - Maria Rita Corvaglia
- Department of Agricultural, Forest, and Food Science, University of Turin, Largo Paolo Braccini 2, Grugliasco, Torino, Italy
| | - Stefania Cocco
- Department of Agriculture, Food and Environmental Sciences, Università Politecnica delle Marche, Via Brecce Bianche 10, Ancona 60131, Italy
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17
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Herrmann C, Sánchez E, Schultze M, Borja R. Comparative effect of biochar and activated carbon addition on the mesophilic anaerobic digestion of piggery waste in batch mode. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2021; 56:946-952. [PMID: 34187300 DOI: 10.1080/10934529.2021.1944833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 06/08/2021] [Accepted: 06/13/2021] [Indexed: 06/13/2023]
Abstract
A comparative study of the batch mesophilic anaerobic digestion of piggery waste was carried out with the addition of 5% biochar and 5% activated carbon. The results obtained showed that the bioreactors amended with biochar increased cumulative methane production, the kinetic constant for methane production and the COD removal efficiency compared to the control reactors and reactors with activated carbon addition. The maximum methane production and the kinetic constant were 6.9% higher in the reactors with biochar addition compared to the controls; while the COD removal efficiency was 3% higher in the case of biochar addition. In the case of activated carbon, only a slight improvement in anaerobic digestion performance was observed compared to the control.
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Affiliation(s)
- Christiane Herrmann
- Department of Bioengineering, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Potsdam, Germany
| | - Enrique Sánchez
- Ministry of Science, Technology and Environment, Investment GAMMA S.A, Havana City, Cuba
| | - Maja Schultze
- Department of Bioengineering, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Potsdam, Germany
| | - Rafael Borja
- Instituto de la Grasa (CSIC), Campus de la Universidad Pablo de Olavide, Sevilla, Spain
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18
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Congilosi JL, Aga DS. Review on the fate of antimicrobials, antimicrobial resistance genes, and other micropollutants in manure during enhanced anaerobic digestion and composting. JOURNAL OF HAZARDOUS MATERIALS 2021; 405:123634. [PMID: 33153790 DOI: 10.1016/j.jhazmat.2020.123634] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 07/01/2020] [Accepted: 08/04/2020] [Indexed: 06/11/2023]
Abstract
While manure has been used as nutrient-rich fertilizer for centuries, anaerobic digestion (AD) of manure has only been recognized recently as a promising renewable energy source for producing methane-rich biogas. Various forms of AD have been evaluated for the removal of manure contaminants, such as antimicrobials, antimicrobial resistance genes (ARGs), hormones, and pesticides that pose risks to human health and the environment. Increasing demand for cleaner energy prompts examination of the fate of manure contaminants in conventional and advanced AD techniques. This review reveals that removal of contaminants differs based on type (e.g. antimicrobials vs hormones) or class (e.g. tetracyclines vs sulfonamides) of chemicals being treated. Increasingly, pre-treatment techniques are incorporated into AD systems to enhance biogas production and degrade manure contaminants. For instance, activated carbon with microwave pretreatment removed 87-95% of ARGs. Advanced anaerobic digestion and solid-state anaerobic digestion reduced various ARGs associated with sulfonamides, macrolides, and tetracyclines. Further, total hormone reduction improved using high-temperature pretreatment prior to mesophilic AD. Finally, several studies revealed partial removal of antimicrobials and ARGs during managed composting. Although AD can independently decrease manure contaminants prior to use as fertilizer, augmenting AD with composting and other physical treatment processes can further enhance their removal.
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Affiliation(s)
- Jena L Congilosi
- Chemistry Department, University at Buffalo, The State University of New York, Buffalo, NY, 14260, USA
| | - Diana S Aga
- Chemistry Department, University at Buffalo, The State University of New York, Buffalo, NY, 14260, USA.
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19
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Gou C, Wang Y, Zhang X, Zhong R, Gao Y. Effects of chlorotetracycline on antibiotic resistance genes and the bacterial community during cattle manure composting. BIORESOURCE TECHNOLOGY 2021; 323:124517. [PMID: 33360947 DOI: 10.1016/j.biortech.2020.124517] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 12/02/2020] [Accepted: 12/03/2020] [Indexed: 06/12/2023]
Abstract
Chlorotetracycline (CTC) is one of the most antibiotics present in cattle manure. In present study, three levels of CTC (0, 20 and 40 mg kg-1) were added to cattle manure composting systems to investigate its effects on the distribution of antibiotic-resistant genes (ARGs) and succession of bacterial community. Adding CTC hindered the removal of ARGs during composting; the high level of CTC significantly increased the relative abundance (RA) of 9/11 ARGs and four MGEs. The bacterial community could be clustered according to the composting time under various treatments, with the high level of CTC having a more persistent effect on the bacterial community. Based on redundancy analysis, bacterial community explained the most variation in ARGs (50.1%), whereas based on network analysis, Firmicutes and Proteobacteria were the main hosts for ARGs. In conclusion, the presence of CTC increased the risks of spreading ARGs in compost products.
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Affiliation(s)
- Changlong Gou
- College of Animal Science and Technology, Inner Mongolia University for Nationalities, Tongliao, Inner Mongolia 028000, China
| | - Yuqiong Wang
- College of Animal Science and Technology, Inner Mongolia University for Nationalities, Tongliao, Inner Mongolia 028000, China
| | - Xiqing Zhang
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, Jilin 130118, China
| | - Rongzhen Zhong
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin 130102, China
| | - Yunhang Gao
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, Jilin 130118, China.
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20
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Ma J, Wang P, Gu W, Su Y, Wei H, Xie B. Does lipid stress affect performance, fate of antibiotic resistance genes and microbial dynamics during anaerobic digestion of food waste? THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 756:143846. [PMID: 33250254 DOI: 10.1016/j.scitotenv.2020.143846] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 11/03/2020] [Accepted: 11/08/2020] [Indexed: 05/25/2023]
Abstract
The dissemination of antibiotic resistance genes (ARGs) in food waste (FW) disposal can pose severe threats to public health. Lipid is a primary composition in FW, while whether lipid stress can affect ARGs dynamics during anaerobic digestion (AD) process of FW is uncertain. This study focused on the impacts of lipid stress on methane production, fate of ARGs and its microbial mechanisms during AD of FW. Results showed that high lipid content increased methane yield but prolonged hydrolysis and lag time of methane production compared to AD of FW without oil. Moreover, variations of ARGs were more susceptible to lipid stress. Lipid stress could facilitate the reduction of total ARGs abundances compared to the group without oil, particularly restraining the proliferation of sul1, aadA1 and mefA in AD systems (P < 0.05). Mantel test suggested that integrons (intl1 and intl2) were significantly correlated with all detected ARGs (r: 0.33, P < 0.05), indicating that horizontal gene transfer mediated by integrons could be the driving force on ARGs dissemination. Network analysis suggested that Firmicutes, Bacteroidetes, Synergistetes and Proteobacteria were the main potential hosts of ARGs. In addition, under the lipid stress, the reduction of host bacteria was responsible for the elimination of several specific ARGs, thereby affecting ARGs profiles. These findings firstly deciphered ARGs dynamics and their driving factors responding to lipid stress during anaerobic biological treatment of FW.
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Affiliation(s)
- Jiaying Ma
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China; Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Panliang Wang
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China; Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Wenchao Gu
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China; Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Yinglong Su
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China; Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China; Engineering Research Center for Nanophotonics & Advanced Instrument, Ministry of Education, East China Normal University, Shanghai 200241, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Huawei Wei
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China; Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Bing Xie
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China; Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China; Engineering Research Center for Nanophotonics & Advanced Instrument, Ministry of Education, East China Normal University, Shanghai 200241, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
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21
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Flores-Orozco D, Patidar R, Levin DB, Sparling R, Kumar A, Çiçek N. Effect of mesophilic anaerobic digestion on the resistome profile of dairy manure. BIORESOURCE TECHNOLOGY 2020; 315:123889. [PMID: 32717520 DOI: 10.1016/j.biortech.2020.123889] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/15/2020] [Accepted: 07/16/2020] [Indexed: 06/11/2023]
Abstract
The effect of mesophilic anaerobic digestion (AD) on the resistome profile of manures from two different dairy farms was evaluated using a metagenomic approach. A total of 187 unique Antibiotic resistance genes (ARGs) for 17 different classes of antibiotics were detected in raw (undigested) manures. The results indicate that regardless of the origin of the dairy manure, mesophilic AD was capable of reducing or enriching the relative abundance of some ARGs. The main driver of these changes was strongly correlated with the evolution of the microbial community during the AD process. Putative ARG hosts were suggested by analyses of the co-occurrence of microbial groups and ARGs. Finally, network analyses revealed that mesophilic AD could also reduce the co-occurrence of different groups of ARGs potentially located in the same genetic elements. Our results provide valuable insights into the microbial mechanisms driving the diversity and abundance of ARGs during mesophilic AD.
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Affiliation(s)
- Daniel Flores-Orozco
- Department of Biosystems Engineering, University of Manitoba, Winnipeg, Manitoba R3T 5V6, Canada.
| | - Rakesh Patidar
- Department of Microbiology, University of Manitoba, Winnipeg, Manitoba R3T 5V6, Canada.
| | - David B Levin
- Department of Biosystems Engineering, University of Manitoba, Winnipeg, Manitoba R3T 5V6, Canada.
| | - Richard Sparling
- Department of Microbiology, University of Manitoba, Winnipeg, Manitoba R3T 5V6, Canada.
| | - Ayush Kumar
- Department of Microbiology, University of Manitoba, Winnipeg, Manitoba R3T 5V6, Canada.
| | - Nazim Çiçek
- Department of Biosystems Engineering, University of Manitoba, Winnipeg, Manitoba R3T 5V6, Canada.
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22
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Kanger K, Guilford NGH, Lee H, Nesbø CL, Truu J, Edwards EA. Antibiotic resistome and microbial community structure during anaerobic co-digestion of food waste, paper and cardboard. FEMS Microbiol Ecol 2020; 96:5700280. [PMID: 31922542 DOI: 10.1093/femsec/fiaa006] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 01/09/2020] [Indexed: 11/13/2022] Open
Abstract
Solid organic waste is a significant source of antibiotic resistance genes (ARGs) and effective treatment strategies are urgently required to limit the spread of antimicrobial resistance. Here, we studied ARG diversity and abundance as well as the relationship between antibiotic resistome and microbial community structure within a lab-scale solid-state anaerobic digester treating a mixture of food waste, paper and cardboard. A total of 10 samples from digester feed and digestion products were collected for microbial community analysis including small subunit rRNA gene sequencing, total community metagenome sequencing and high-throughput quantitative PCR. We observed a significant shift in microbial community composition and a reduction in ARG diversity and abundance after 6 weeks of digestion. ARGs were identified in all samples with multidrug resistance being the most abundant ARG type. Thirty-two per cent of ARGs detected in digester feed were located on plasmids indicating potential for horizontal gene transfer. Using metagenomic assembly and binning, we detected potential bacterial hosts of ARGs in digester feed, which included Erwinia, Bifidobacteriaceae, Lactococcus lactis and Lactobacillus. Our results indicate that the process of sequential solid-state anaerobic digestion of food waste, paper and cardboard tested herein provides a significant reduction in the relative abundance of ARGs per 16S rRNA gene.
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Affiliation(s)
- Kärt Kanger
- Faculty of Science and Technology, University of Tartu, Vanemuise 46, 51003 Tartu, Estonia
| | - Nigel G H Guilford
- BioZone Centre for Applied Biosciences and Bioengineering, Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, ON M5S 3E5, Canada
| | - HyunWoo Lee
- BioZone Centre for Applied Biosciences and Bioengineering, Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, ON M5S 3E5, Canada
| | - Camilla L Nesbø
- BioZone Centre for Applied Biosciences and Bioengineering, Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, ON M5S 3E5, Canada.,Department of Biological Sciences, University of Alberta, 11455 Saskatchewan Drive, Edmonton, AB T6G 2E9, Canada
| | - Jaak Truu
- Faculty of Science and Technology, University of Tartu, Vanemuise 46, 51003 Tartu, Estonia
| | - Elizabeth A Edwards
- BioZone Centre for Applied Biosciences and Bioengineering, Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, ON M5S 3E5, Canada
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23
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Zhang J, Qi Q, Mao L, He Y, Loh KC, Wah Tong Y. Mixing strategies - Activated carbon nexus: Rapid start-up of thermophilic anaerobic digestion with the mesophilic anaerobic sludge as inoculum. BIORESOURCE TECHNOLOGY 2020; 310:123401. [PMID: 32334361 DOI: 10.1016/j.biortech.2020.123401] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 04/13/2020] [Accepted: 04/16/2020] [Indexed: 06/11/2023]
Abstract
This study evaluated the mixing - activate carbon nexus in anaerobic digestion with the aim of accelerating start-up of thermophilic anaerobic co-digestion of food waste and chicken manure using mesophilic anaerobic sludge as inoculum. Results showed that the methane yield in the continuous stirred reactor is 71.3% higher than that of intermittent agitated reactor, and the addition of activated carbon can further improve the yield of methane by 18.2%. Continuous mixing mode followed by intermittent mixing was proved to be an alternative strategy to accelerate start-up of thermophilic anaerobic digestion. The optimum mixing time of 120 s/hour were obtained using computational fluid dynamics modeling. Analysis of genomic annotation metabolism indicated that the addition of activated carbon enhanced the dominant metabolism pathways of amino acid, methane and energy. Results of enzymes gene expression suggested that carbohydrates esterases, glycoside hydrolases and glycosyl transferases were dominant, respectively.
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Affiliation(s)
- Jingxin Zhang
- China-UK Low Carbon College, Shanghai Jiao Tong University, Shanghai 201306, China.
| | - Qiuxian Qi
- China-UK Low Carbon College, Shanghai Jiao Tong University, Shanghai 201306, China
| | - Liwei Mao
- Environmental Research Institute, National University of Singapore, Singapore
| | - Yiliang He
- China-UK Low Carbon College, Shanghai Jiao Tong University, Shanghai 201306, China; School of Environmental Science and Engineering, Shanghai Jiao Tong University, China
| | - Kai-Chee Loh
- Department of Chemical & Biomolecular Engineering, National University of Singapore, Singapore
| | - Yen Wah Tong
- Environmental Research Institute, National University of Singapore, Singapore; Department of Chemical & Biomolecular Engineering, National University of Singapore, Singapore
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24
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Guo HG, Chen QL, Hu HW, He JZ. Fate of antibiotic resistance genes during high-solid anaerobic co-digestion of pig manure with lignite. BIORESOURCE TECHNOLOGY 2020; 303:122906. [PMID: 32028218 DOI: 10.1016/j.biortech.2020.122906] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 01/24/2020] [Accepted: 01/24/2020] [Indexed: 06/10/2023]
Abstract
Lignite could be used to promote methane production during high-solid anaerobic co-digestion (HS-AcoD) of pig manure, however, the effects of lignite amendment on the fate of ARGs during HS-AcoD are unknown. Here, we explored the influence of lignite (0%, 8%, 16%, 32%, and 64%) on the fate of ARGs during HS-AcoD of pig manure. The results showed that 16% lignite reduced the absolute abundance of ARGs by 28.71% compared with the 0% lignite treatment. Variation partitioning analysis suggested the combined effect of microbial community, mobile genetic elements (MGEs) and environmental factors was the major driver shaping the pattern of ARGs. The potential hosts of ARGs were Bifidobacterium, Lactobacillus, Tissierella and Streptococcus. Structural equation models analysis suggested lignite indirectly impacted the pattern of ARGs by significantly reducing the abundance of microbial community and MGEs. These findings give an insight into the mechanistic understanding of the lignite influence on the reduction of ARGs during HS-AcoD.
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Affiliation(s)
- Hai-Gang Guo
- College of Life Sciences and Food Engineering, Hebei University of Engineering, Handan 056038, China; Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Victoria 3010, Australia; Huayu Agricultural Science and Technology Co., LTD, Handan 057153, China
| | - Qing-Lin Chen
- Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Victoria 3010, Australia
| | - Hang-Wei Hu
- Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Victoria 3010, Australia
| | - Ji-Zheng He
- Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Victoria 3010, Australia.
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Song B, Gong J, Tang W, Zeng G, Chen M, Xu P, Shen M, Ye S, Feng H, Zhou C, Yang Y. Influence of multi-walled carbon nanotubes on the microbial biomass, enzyme activity, and bacterial community structure in 2,4-dichlorophenol-contaminated sediment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 713:136645. [PMID: 31955106 DOI: 10.1016/j.scitotenv.2020.136645] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 01/06/2020] [Accepted: 01/10/2020] [Indexed: 06/10/2023]
Abstract
The rise in manufacture and use of carbon nanotubes has aroused the concern about their potential risks associated with coexisting pollutants in the aquatic environment. 2,4-dichlorophenol (2,4-DCP), with a high toxicity to many aquatic organisms, is a widespread pollutant resulting from the extensive use of pesticides and preservatives. In this article, the adsorption of 2,4-DCP by riverine sediment and the responses of sediment microbial community to 2,4-DCP were studied in the presence of multi-walled carbon nanotubes (MWCNTs). Adding MWCNTs significantly increased the adsorption amount of sediment for 2,4-DCP from 0.541 to 1.44 mg/g as the MWCNT concentration increased from 0 to 15 mg/g. The responses of sediment microbial community were determined after one-month exposure to MWCNTs at different concentrations (0.05, 0.5, 5, and 50 mg/g). The microbial biomass carbon in the sediment contaminated with 2,4-DCP increased in the presence of 5 mg/g of MWCNTs (from 0.06 to 0.11 mg/g), but not significantly changed at other MWCNT concentrations. For the sediments contaminated with 2,4-DCP, the presence of MWCNTs made no difference to urease activity, while the dehydrogenase activity slightly increased with the addition of 5 mg/g of MWCNTs and decreased in the presence of 50 mg/g of MWCNTs. The changes of sediment bacterial communities were further determined by 16S rRNA gene sequencing. Based on the weighted UniFrac distance between communities, the clustering analysis suggested that the contamination of 2,4-DCP affected the bacterial community structure in a greater degree than that caused by MWCNTs at relatively low concentrations (≤5 mg/g). Bacteroidetes, Planctomycetes, and Nitrospirae were feature bacterial phyla to reflect the effects of MWCNTs and 2,4-DCP on sediment bacterial community. These results may contribute to the understanding of microbial community response to co-exposure of MWCNTs and 2,4-DCP and the assessment of associated ecological risks.
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Affiliation(s)
- Biao Song
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Jilai Gong
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Wangwang Tang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Guangming Zeng
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Ming Chen
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Piao Xu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Maocai Shen
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Shujing Ye
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Haopeng Feng
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Chengyun Zhou
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Yang Yang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
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Wang P, Chen X, Liang X, Cheng M, Ren L. Effects of nanoscale zero-valent iron on the performance and the fate of antibiotic resistance genes during thermophilic and mesophilic anaerobic digestion of food waste. BIORESOURCE TECHNOLOGY 2019; 293:122092. [PMID: 31505392 DOI: 10.1016/j.biortech.2019.122092] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 08/27/2019] [Accepted: 08/29/2019] [Indexed: 06/10/2023]
Abstract
The effects of nanoscale zero-valent iron (nZVI) on the performance of food waste anaerobic digestion and the fate of antibiotic resistance genes (ARGs) were investigated in thermophilic (TR) and mesophilic (MR) reactors. Results showed that nZVI enhanced biogas production and facilitated ARGs reduction. The maximum CH4 production was 212.00 ± 4.77 ml/gVS with 5 g/L of nZVI in MR. The highest ARGs removal ratio was 86.64 ± 0.72% obtained in TR at nZVI of 2 g/L. nZVI corrosion products and their contribution on AD performance were analyzed. The abundance of tetracycline genes reduced significantly in nZVI amended digesters. Firmicutes, Chloroflexi, Proteobacteria and Spirochaetes showed significant positive correlations with various ARGs (p < 0.05) in MR and TR. Redundancy analysis indicated that microbial community was the main factor that influenced the fate of ARGs. nZVI changed microbial communities, with decreasing the abundance bacteria belonging to Firmicutes and resulting in the reduction of ARGs.
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Affiliation(s)
- Pan Wang
- School of Food and Chemical Engineering, Beijing Technology and Business University, Beijing 100048, China; Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry, Beijing Technology and Business University, Beijing 100048, China
| | - Xiteng Chen
- School of Food and Chemical Engineering, Beijing Technology and Business University, Beijing 100048, China; Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry, Beijing Technology and Business University, Beijing 100048, China
| | - Xiaofei Liang
- School of Food and Chemical Engineering, Beijing Technology and Business University, Beijing 100048, China; Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry, Beijing Technology and Business University, Beijing 100048, China
| | - Mengmeng Cheng
- School of Food and Chemical Engineering, Beijing Technology and Business University, Beijing 100048, China; Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry, Beijing Technology and Business University, Beijing 100048, China
| | - Lianhai Ren
- School of Food and Chemical Engineering, Beijing Technology and Business University, Beijing 100048, China; Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry, Beijing Technology and Business University, Beijing 100048, China.
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27
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Lu XM, Lu PZ. Synergistic effects of key parameters on the fate of antibiotic resistance genes during swine manure composting. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 252:1277-1287. [PMID: 31252125 DOI: 10.1016/j.envpol.2019.06.073] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 05/20/2019] [Accepted: 06/18/2019] [Indexed: 06/09/2023]
Abstract
Livestock manure is a reservoir of antibiotic resistance genes (ARGs), posing a potential risk to environment and human health. However, there has been no optimization study about the comprehensive composting treatment for livestock manure ARGs based on multiple operation factors. In this study, anaerobic composting of swine manure in light was conducted under different combined conditions of composting time, temperature, water content, pH, heavy metal passivators and wheat straw. The diversity and relative abundance of ARGs in the compost were detected using high throughput quantitative real-time PCR, and the concentrations of antibiotics and heavy metals were determined. The results showed that under the optimized conditions (composting time, 30 d; temperature, 50 °C; water content, 50%; pH 9.0; heavy metal passivators and wheat straw), compared with the control, the detected number of ARGs and mobile genetic elements in the compost was reduced by 45% and 27.3%, and their relative abundance decreased by 33.9% and 36.9%, respectively. Moreover, the exchangeable heavy metal content of the compost declined by 34.7-57.1%, and the antibiotic level decreased by 28.8-77.8%. This study proposes that synergistic effects of key parameters can effectively mitigate the combined contamination of ARGs, antibiotics, and heavy metals in swine manure. MAIN FINDING: Optimized parameters (anaerobic composting time 30 d, temperature 50 °C, water content 50%, pH 9.0) effectively mitigated the combined pollution of ARGs, antibiotics, and heavy metals in swine manure.
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Affiliation(s)
- Xiao-Ming Lu
- School of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou 350118, China.
| | - Peng-Zhen Lu
- Faculty of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China
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28
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Zarei-Baygi A, Harb M, Wang P, Stadler LB, Smith AL. Evaluating Antibiotic Resistance Gene Correlations with Antibiotic Exposure Conditions in Anaerobic Membrane Bioreactors. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:3599-3609. [PMID: 30810034 DOI: 10.1021/acs.est.9b00798] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Anaerobic membrane bioreactors (AnMBRs) are an emerging technology with potential to improve energy efficiency and effluent reuse in mainstream wastewater treatment. However, their contribution to the proliferation of contaminants of emerging concern, such as antibiotic resistance genes (ARGs), remains largely unknown. The purpose of this study was to determine the effect of select influent antibiotics at varying concentrations on the presence and abundance of ARGs in an AnMBR system and its effluent. Quantification of targeted ARGs revealed distinct profiles in biomass and effluent, with genes conferring resistance to different antibiotic classes dominating in biomass (macrolides) and effluent (sulfonamides). Effluent sul1 gene abundance was strongly correlated with abundance of intl1, signifying the potential importance of mobile genetic elements in ARG release from AnMBR systems. The addition of specific antibiotics also affected normalized abundances of their related ARGs, exemplifying the potential impact of selective pressures at both low (10 μg/L) and high (250 μg/L) influent antibiotic concentrations.
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Affiliation(s)
- Ali Zarei-Baygi
- Astani Department of Civil and Environmental Engineering , University of Southern California , 3620 South Vermont Avenue , Los Angeles , California 90089 , United States
| | - Moustapha Harb
- Astani Department of Civil and Environmental Engineering , University of Southern California , 3620 South Vermont Avenue , Los Angeles , California 90089 , United States
| | - Phillip Wang
- Astani Department of Civil and Environmental Engineering , University of Southern California , 3620 South Vermont Avenue , Los Angeles , California 90089 , United States
| | - Lauren B Stadler
- Department of Civil and Environmental Engineering , Rice University , 6100 Main Street , Houston , Texas 77005 , United States
| | - Adam L Smith
- Astani Department of Civil and Environmental Engineering , University of Southern California , 3620 South Vermont Avenue , Los Angeles , California 90089 , United States
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Buhlmann CH, Mickan BS, Jenkins SN, Tait S, Kahandawala TKA, Bahri PA. Ammonia stress on a resilient mesophilic anaerobic inoculum: Methane production, microbial community, and putative metabolic pathways. BIORESOURCE TECHNOLOGY 2019; 275:70-77. [PMID: 30579103 DOI: 10.1016/j.biortech.2018.12.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 12/03/2018] [Accepted: 12/06/2018] [Indexed: 06/09/2023]
Abstract
Short term inhibition tests, 16S rRNA tag sequencing and Phylogenetic Investigation of Communities by Reconstruction of Unobserved States (PICRUSt), were employed to visualise the effects of increasing total ammoniacal nitrogen (TAN) concentration (3400-10166 ppm TAN) on microbial community structure and metabolic pathways for acetate degradation. The rate of methane production on acetate was significantly reduced by TAN concentrations above 6133 ppm; however, methane continued to be produced, even at 10166 ppm TAN (0.026 ± 0.0003 gCOD.gVS-1inoculum.day-1). Hydrogenotrophic methanogenesis with syntrophic acetate oxidation (SAO) was identified as the dominant pathway for methane production. A shift towards SAO pathways at higher TAN concentrations and a decrease in the number of 'gene hits' for key genes in specific methanogenesis pathways was observed. Overall, the results highlighted potential for inhibition activity testing to be used together with PICRUSt, to estimate changes in microbial metabolism and to better understand microbial resilience in industrial AD facilities.
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Affiliation(s)
- Christopher H Buhlmann
- Murdoch University School of Engineering and Information Technology, Murdoch University, 90 South St, Murdoch, WA 6150, Australia.
| | - Bede S Mickan
- UWA School of Agriculture and Environment (M079), The University of Western Australia, Perth, WA 6009, Australia; The UWA Institute of Agriculture (M082), The University of Western Australia, Perth, WA 6009, Australia; Richgro Garden Products, 203 Acourt Rd, Jandakot, WA 6164, Australia
| | - Sasha N Jenkins
- UWA School of Agriculture and Environment (M079), The University of Western Australia, Perth, WA 6009, Australia; The UWA Institute of Agriculture (M082), The University of Western Australia, Perth, WA 6009, Australia
| | - Stephan Tait
- Centre for Agricultural Engineering, The University of Southern Queensland, Toowoomba, QLD 4350, Australia
| | - Tharanga K A Kahandawala
- UWA School of Agriculture and Environment (M079), The University of Western Australia, Perth, WA 6009, Australia
| | - Parisa A Bahri
- Murdoch University School of Engineering and Information Technology, Murdoch University, 90 South St, Murdoch, WA 6150, Australia
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30
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Effects of activated carbon on anaerobic digestion – Methanogenic metabolism, mechanisms of antibiotics and antibiotic resistance genes removal. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.biteb.2019.01.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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31
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Ravasi D, König R, Principi P, Perale G, Demarta A. Effect of Powdered Activated Carbon as Advanced Step in Wastewater Treatments on Antibiotic Resistant Microorganisms. Curr Pharm Biotechnol 2019; 20:63-75. [PMID: 30727884 PMCID: PMC6637097 DOI: 10.2174/1389201020666190207095556] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 11/16/2018] [Accepted: 01/19/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND Conventional wastewater treatment plants discharge significant amounts of antibiotic resistant bacteria and antibiotic resistance genes into natural water bodies contributing to the spread of antibiotic resistance. Some advanced wastewater treatment technologies have been shown to effectively decrease the number of bacteria. Nevertheless, there is still a lack of knowledge about the effectiveness of these treatments on antibiotic resistant bacteria and antibiotic resistant genes. To the best of our knowledge, no specific studies have considered how powdered activated carbon (PAC) treatments can act on antibiotic resistant bacteria, although it is essential to assess the impact of this wastewater treatment on the spread of antibiotic resistant bacteria. METHODS To address this gap, we evaluated the fate and the distribution of fluorescent-tagged antibiotic/ antimycotic resistant microorganisms in a laboratory-scale model simulating a process configuration involving powdered activated carbon as advanced wastewater treatment. Furthermore, we studied the possible increase of naturally existing antibiotic resistant bacteria during the treatment implementing PAC recycling. RESULTS The analysis of fluorescent-tagged microorganisms demonstrated the efficacy of the PAC adsorption treatment in reducing the load of both susceptible and resistant fluorescent microorganisms in the treated water, reaching a removal efficiency of 99.70%. Moreover, PAC recycling did not increase the resistance characteristics of cultivable bacteria neither in the sludge nor in the treated effluent. CONCLUSION Results suggest that wastewater PAC treatment is a promising technology not only for the removal of micropollutants but also for its effect in decreasing antibiotic resistant bacteria release.
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Affiliation(s)
| | | | | | | | - Antonella Demarta
- Address correspondence to this author at the Laboratory of applied microbiology, Department of Environment, Construction and Design, University of Applied Sciences and Arts of Southern Switzerland, Via Mirasole 22a, 6501 Bellinzona, Switzerland; E-mail:
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Liu J, Gu J, Wang X, Lu C, Zhang R, Zhang X, Zhang K, Qiu L. Evaluating the effects of coal gasification slag on the fate of antibiotic resistant genes and mobile genetic elements during anaerobic digestion of swine manure. BIORESOURCE TECHNOLOGY 2019; 271:24-29. [PMID: 30261333 DOI: 10.1016/j.biortech.2018.08.051] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 08/13/2018] [Accepted: 08/14/2018] [Indexed: 06/08/2023]
Abstract
Coal gasification slag (GS) is an industrial solid waste with a highly developed pore structure, which can be used in anaerobic digestion (AD) to remove antibiotic resistance genes (ARGs) due to its structure, thereby utilizing this waste resource. This study evaluated the effects of three GS levels (0, 5, and 10 g/L) on the abundances of ARGs, mobile genetic elements, and the bacterial community. With GS added at 10 g/L, the removal rates for ARGs (dfrA7, sul2, tetW, ermF, and ermQ) were 24.81-90.48% after AD, and the removal rate for ISCR1 was 95.4%. In addition, 10 g/L GS was more effective at reducing the abundances of potential human pathogens. The variations in ARGs may have been affected by the succession of the microbial community. The results of this study demonstrate that supplementation with 10 g/L GS is more useful for reducing ARGs during AD.
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Affiliation(s)
- Jiayao Liu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jie Gu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Research Center of Recycle Agricultural Engineering and Technology of Shaanxi Province, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Xiaojuan Wang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Chunya Lu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Ranran Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xin Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Kaiyu Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Ling Qiu
- Northwest A&F University, College of Mechanical and Electrical Engineering, Yangling, Shaanxi 712100, China
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Lu C, Gu J, Wang X, Liu J, Zhang K, Zhang X, Zhang R. Effects of coal gasification slag on antibiotic resistance genes and the bacterial community during swine manure composting. BIORESOURCE TECHNOLOGY 2018; 268:20-27. [PMID: 30064034 DOI: 10.1016/j.biortech.2018.07.086] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2018] [Revised: 07/14/2018] [Accepted: 07/17/2018] [Indexed: 06/08/2023]
Abstract
This study investigated the effects of the addition of coal gasification slag (CGS) at three levels (0%, 5%, and 10% w/w) on antibiotic resistance genes (ARGs) and the bacterial community during composting. The addition of CGS effectively facilitated the removal of ARGs and mobile genetic elements (MGEs), where it significantly reduced the relative abundances of 5/11 ARGs and three MGEs in the swine manure composting product. In addition, the enrichment of ARGs and intI1 was lower under the addition of 10% CGS compared with 0% CGS. The bacterial community was distributed according to the composting time under different treatments. Redundancy analysis showed that bacterial community succession and MGE-mediated horizontal gene transfer played important roles in the variations in ARGs. Network analysis indicated the co-occurrence of ARGs and MGEs with specific microorganisms. Thus, 10% CGS may be a suitable additive for reducing the risks of ARGs in compost products.
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Affiliation(s)
- Chunya Lu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jie Gu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Research Center of Recycle Agricultural Engineering and Technology of Shaanxi Province, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Xiaojuan Wang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jiayao Liu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Kaiyu Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xin Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Ranran Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China
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Zhang C, Yun S, Li X, Wang Z, Xu H, Du T. Low-cost composited accelerants for anaerobic digestion of dairy manure: Focusing on methane yield, digestate utilization and energy evaluation. BIORESOURCE TECHNOLOGY 2018; 263:517-524. [PMID: 29778022 DOI: 10.1016/j.biortech.2018.05.042] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 05/09/2018] [Accepted: 05/10/2018] [Indexed: 06/08/2023]
Abstract
To improve the methane yield and digestate utilization of anaerobic digestion (AD), low-cost composited accelerants consisting of urea (0.2-0.5%), bentonite (0.5-0.8%), active carbon (0.6-0.9%), and plant ash (0.01-0.3%) were designed and tested in batch experiments. Total biogas yield (485.7-681.9 mL/g VS) and methane content (63.0-66.6%) were remarkably enhanced in AD systems by adding accelerants compared to those of control group (361.9 mL/g VS, 59.4%). Composited accelerant addition led to the highest methane yield (454.1 mL/g VS), more than double that of control group. The TS, VS, and CODt removal rates (29.7-55.3%, 50.9-63.0%, and 46.8-69.1%) for AD with accelerants were much higher than control group (26.2%, 37.1%, and 39.6%). The improved digestate stability and enhanced fertilizer nutrient content (4.95-5.66%) confirmed that the digestate of AD systems with composited accelerants could safely serve as a potential component of bioorganic fertilizer. These findings open innovative avenues in composited accelerant development and application.
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Affiliation(s)
- Chen Zhang
- Functional Materials Laboratory (FML), School of Materials & Mineral Resources, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710055, China
| | - Sining Yun
- Functional Materials Laboratory (FML), School of Materials & Mineral Resources, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710055, China.
| | - Xue Li
- Functional Materials Laboratory (FML), School of Materials & Mineral Resources, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710055, China
| | - Ziqi Wang
- Functional Materials Laboratory (FML), School of Materials & Mineral Resources, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710055, China
| | - Hongfei Xu
- Functional Materials Laboratory (FML), School of Materials & Mineral Resources, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710055, China
| | - Tingting Du
- Functional Materials Laboratory (FML), School of Materials & Mineral Resources, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710055, China
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