Effects of inoculation with lignocellulose-degrading microorganisms on antibiotic resistance genes and the bacterial community during co-composting of swine manure with spent mushroom substrate

Hu, Ting; Wang, Xiaojuan; Zhen, Lisha; Gu, Jie; Zhang, Kaiyu; Wang, Qianzhi; Ma, Jiyue; Peng, Huiling

doi:10.1016/j.envpol.2019.05.078

Cited by 77 publications

(12 citation statements)

References 58 publications

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“…A few studies previously suggested that microaeration and iron dosing could improve the removal of ARGs. 13,56,57 Interestingly, the abundance of potential ARGs/MGE hosts, genera Pseudomonas and Solibacillus 48,49 were the most abundant in the control reactor (discussed earlier).…”

Section: ■ Materials and Methodsmentioning

confidence: 78%

“…However, between the two test reactors, the microaeration reactor had a slightly higher total abundance of integrons ( int 1 and int 2). A few studies previously suggested that microaeration and iron dosing could improve the removal of ARGs. ,, Interestingly, the abundance of potential ARGs/MGE hosts, genera Pseudomonas and Solibacillus , were the most abundant in the control reactor (discussed earlier).…”

Section: Resultsmentioning

confidence: 89%

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Bench-Scale Liquid-Phase Microaeration and Iron Dosing Comparison for In Situ Biogas Desulfurization and Antibiotic Resistance Management in Mesophilic Anaerobic Digestion

Mirsoleimani Azizi,

Zakaria,

Haffiez

et al. 2023

ACS EST Water

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Microaeration and iron dosing are promising in situ desulfurization methods for anaerobic digestion (AD). However, limited reports exist on their systematic comparison. Consequently, this study investigated liquid-phase microaeration (60–106 mL air/Lreactor/d) and ferric chloride (250–650 mg FeCl3/L) dosages in mesophilic AD of sewage sludge operated at a solid residence time of 20 days. Both methods provided up to 88% H2S removal and moderate siloxane removal (30–37%) but had no apparent impact on mercaptan removal from biogas. However, the control and test reactors demonstrated equivalent AD performance in terms of biomethane yields, chemical oxygen demand, and total/volatile solids degradation efficiencies, indicating that air and iron dosages were primarily utilized for biogas desulfurization. Still, both methods resulted in substantial changes in microbial community composition. Notably, the indication of syntrophy between facultative microbes and hydrogenotrophic methanogens was intensified by both methods. For both methods, antibiotic resistance gene (ARG) and mobile genetic element (MGE) abundances in digestate decreased considerably due to the decrease in the abundance of potential ARG hosts. Compared to iron dosing, MGE removal was slightly higher in the microaeration reactor. These findings provide valuable insights into the efficacy of these two approaches in desulfurization and the reduction of antibiotic resistance in AD.

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Section: ■ Materials and Methodsmentioning

confidence: 78%

Section: Resultsmentioning

confidence: 89%

Bench-Scale Liquid-Phase Microaeration and Iron Dosing Comparison for In Situ Biogas Desulfurization and Antibiotic Resistance Management in Mesophilic Anaerobic Digestion

Mirsoleimani Azizi,

Zakaria,

Haffiez

et al. 2023

ACS EST Water

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“…Similarly, the inoculation of 0.5% (w/w) of Bacillus subtilis into the composting of cattle manure and wheat stalks mixture decreased the relative abundances of ARGs, mobile genetic elements and human pathogenic bacteria (by 2 to 3 logs) in the composts [74]. Furthermore, it was reported that the inoculation of microbial suspension of lignocellulose-degrading microorganisms consisting of mainly Bacillus, Brevibacillus, Paenibacillus and Lysinibacillus genera, decreased the total relative abundance of ARGs by 0.08 logs and affected the bacterial community structure in the mesophilic phase, with the inhibitory effect of potential pathogens during the composting of swine manure and spent mushroom substrate as compared to control treatment [70]. Hence, the addition of inoculum could potentially reduce the ARGs, inhibit pathogens, as well as making the final compost products safer.…”

Section: Microbial Inoculation With Additional Functions As a Means To Enhance The Composting Processmentioning

confidence: 99%

Enhancement of Agro-Industrial Waste Composting Process via the Microbial Inoculation: A Brief Review

et al. 2022

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Composting is an important technology used to treat and convert organic waste into value-added products. Recently, several studies have been done to investigate the effects of microbial supplementation on the composting of agro-industrial waste. According to these studies, microbial inoculation is considered to be one of the suitable methods for enhancing the biotransformation of organic materials during the composting process. This review provides up-to-date research findings on microbial inoculation strategies and their role and functions in enhancing the composting process and the improvement of compost quality. Based on this review, the addition of microorganisms could enhance the composting process such as accelerating the organic matter degradation, mineralization and microbial enzymes activities, and the quality of the end-products such as high germination index. It is important to notice in this strategy that sludge’s microbial consortium is feasible to enhance the composting process in pilot-scale and industrial-scale productions. Besides, it also reduces the cost of compost production. The findings of this review show the various positive impact of microbial inoculation on agro-industrial waste composting which in turn might be useful as a reference for selecting a suitable inoculum based on the type of waste materials.

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“…In the ammonia removal efficiencies of the experimental groups, some mixed cultures showed 55.9 to 86.7% removal efficiencies throughout the period compared to the control group that had not undergone any inoculation. Other studies also show how pig manure inoculation with an EM mixture rich in lignocellulose-degrading microorganisms could decrease the risk of antibiotic resistance genes spreading and make manure management processes more secure [113].…”

Section: Effect On Pig Manurementioning

confidence: 99%

Manure biostabilization by effective microorganisms as a way to improve its agronomic value

Hidalgo

Corona

Martín-Marroquín

2022

Biomass Conv. Bioref.

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The traditional logic behind effective microorganism is based on a media inoculation with mixed cultures of beneficial microorganisms to create a more favorable environment for plant growth and health when the media is the soil. Following this rationale, other research works have been focused on studying the effect of effective microorganisms when they are used as manure stabilizing agents, in some cases by including them in animal diets, reporting, in all cases, beneficial properties. However, the use of effective microorganisms is not yet widespread. One reason may be that no rigorous research has so far been done on the actual utility of these mixed cultures on manure stabilization and crop production. In this work, the potential uses of effective microorganisms are shown with the focus on evaluating the influence of these mixed cultures on the biostabilization of manure before its use as fertilizer. This work also presents some new perspectives on the role and application of effective microorganisms as microbial inoculants to achieve a microbiological balance of manure so that it can improve its quality, increasing production and protection of crops when applied as fertilizer, helping to conserving natural resources and creating a more sustainable agriculture and environment. Finally, this document also reviews strategies on how to improve the effect of effective microorganisms after their inoculation into the soil as part of the manure.

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Effects of inoculation with lignocellulose-degrading microorganisms on antibiotic resistance genes and the bacterial community during co-composting of swine manure with spent mushroom substrate

Cited by 77 publications

References 58 publications

Bench-Scale Liquid-Phase Microaeration and Iron Dosing Comparison for In Situ Biogas Desulfurization and Antibiotic Resistance Management in Mesophilic Anaerobic Digestion

Bench-Scale Liquid-Phase Microaeration and Iron Dosing Comparison for In Situ Biogas Desulfurization and Antibiotic Resistance Management in Mesophilic Anaerobic Digestion

Enhancement of Agro-Industrial Waste Composting Process via the Microbial Inoculation: A Brief Review

Manure biostabilization by effective microorganisms as a way to improve its agronomic value

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