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61,005 resultsShowing papers similar to Systematic study of microplastics on methane production in anaerobic digestion: Performance and microbial response
ClearRevealing the Mechanisms of Polyethylene Microplastics Affecting Anaerobic Digestion of Waste Activated Sludge
Researchers studied how polyethylene microplastics affect the anaerobic digestion of sewage sludge, a common wastewater treatment process. They found that higher concentrations of microplastics significantly reduced methane production by disrupting microbial communities and enzyme activities essential for digestion. The study reveals that microplastic contamination in wastewater systems can undermine the efficiency of sludge treatment and biogas generation.
Effect of microplastic on anaerobic digestion of wasted activated sludge
This study investigated how varying doses of microplastics affect methane production during anaerobic digestion of waste activated sludge, testing concentrations from 0 to 100,000 particles per gram. Higher microplastic doses progressively inhibited methane production, suggesting that high microplastic loads in wastewater treatment sludge can impair biogas recovery.
Microplastics in anaerobic digestion: occurrence, impact, and mitigation strategies
This review examines the presence and impact of microplastics within anaerobic digestion systems used to process sewage sludge and organic waste. Researchers found that microplastics enter these systems through diverse waste inputs and may affect biogas production, microbial community composition, and overall process performance. The study highlights the need for further research into how microplastics interact with anaerobic digestion and what mitigation strategies could minimize their interference.
Comprehensive meta-analysis reveals the impact of non-biodegradable plastic pollution on methane production in anaerobic digestion
This meta-analysis found that microplastics and nanoplastics interfere with anaerobic digestion, a process used to treat organic waste and produce methane. Smaller nanoplastics had a greater impact, suggesting that plastic contamination in waste could reduce the efficiency of this important waste treatment and energy recovery method.
Fate and Impacts of Microplastics in Sludge Anaerobic Digestion: Effects on Methanogenic and Acidogenic Pathways
This review examined how microplastics in sewage sludge influence anaerobic digestion performance, covering effects on methane production, volatile fatty acid accumulation, and microbial community function. MPs inhibited methanogenesis at higher concentrations by altering microbial community structure and disrupting electron transfer pathways in the anaerobic digestion process.
Effect of Emerging Micropollutants on the Anaerobic Digestion of Sewage Sludge
This review examines how emerging pollutants, including microplastics, affect the anaerobic digestion process used to treat sewage sludge at wastewater plants. Microplastics can interfere with the bacteria that break down sludge and produce biogas, potentially reducing treatment efficiency. This is concerning because sewage sludge is often applied to farmland as fertilizer, and if microplastics disrupt the treatment process, the resulting biosolids may contain higher levels of both microplastics and other harmful substances.
Fate of microplastics in a centralized biogas plant treating mainly sewage sludge
Researchers tracked the fate of microplastics through a centralized biogas plant treating sewage sludge, examining how anaerobic digestion and subsequent dewatering partition microplastics between solid and liquid digestate fractions. The study informs efforts to develop safer digestate-based recycled fertilizers that minimize microplastic introduction to agricultural soils, where 20-55% of microplastics entering wastewater treatment plants are estimated to end up in sludge.
Deciphering the role of polystyrene microplastics in waste activated sludge anaerobic digestion: Changes of organics transformation, microbial community and metabolic pathway
Researchers found that polystyrene microplastics in sewage sludge affected the anaerobic digestion process used to treat waste, with low concentrations slightly boosting methane production but high concentrations reducing it by up to 11%. The microplastics disrupted key bacterial communities and enzyme activities needed for proper waste breakdown. This matters because wastewater treatment plants handle enormous volumes of microplastic-laden sludge, and impaired digestion could reduce treatment effectiveness and release more pollutants into the environment.
Effects of Micro(nano)plastics on Anaerobic Digestion and Their Influencing Mechanisms
This review examines how micro- and nanoplastics from organic waste streams affect anaerobic digestion (AD) performance, covering impacts on methane production, microbial community structure, and enzyme activity. It identifies plastic polymer type and concentration as key variables determining whether MPs stimulate or inhibit digestion processes.
Impact of micro-nanoplastics on biochemical phases of anaerobic digestion in sewage sludge treatment: mechanistic insights and future prospects
Micro- and nanoplastics were found to disrupt the biochemical phases of anaerobic digestion, affecting the efficiency of the biological process used to treat organic waste. Understanding these impacts is important because anaerobic digestion is a common wastewater and sludge treatment method that may both receive and process microplastic-contaminated materials.
Insights into the impact of polyethylene microplastics on methane recovery from wastewater via bioelectrochemical anaerobic digestion
Researchers found that polyethylene microplastics inhibited methane recovery in bioelectrochemical anaerobic digestion systems by disrupting microbial communities and electrochemical performance, though low concentrations had less severe effects.
Unraveling the effects and mechanisms of microplastics on anaerobic fermentation: Exploring microbial communities and metabolic pathways
Researchers investigated how five types of microplastics affect the anaerobic fermentation process used to treat sewage sludge. They found that polyethylene microplastics caused the greatest reduction in volatile fatty acid production, while polyvinyl chloride had the least impact, and all types disrupted microbial communities in distinct ways. The study suggests that microplastic contamination in wastewater could meaningfully interfere with sludge treatment efficiency.
Occurrence, effect, and fate of residual microplastics in anaerobic digestion of waste activated sludge: A state-of-the-art review
This review assessed the occurrence, behavior, and fate of microplastics in anaerobic digestion of waste activated sludge, finding that MPs survive digestion largely intact but can affect methane production and microbial community composition, and that digestate land application remains a major pathway for releasing sludge-retained MPs to soil.
Microplastic Behavior in Sludge Pretreatment and Anaerobic Digestion: Impacts, Mechanistic Insights, and Mitigation Strategies
This review examines how microplastics behave during sludge pretreatment and anaerobic digestion, finding that microplastics frequently persist through these processes and can affect methane production and microbial communities when present at elevated concentrations, calling for mitigation strategies in wastewater treatment.
The Potential of Ozonation to Reduce Impact of Waste Sludge-Entrapped Microplastics to Biogas Production
Wastewater treatment plants concentrate microplastics from sewage into the resulting sludge, and this study tested whether ozonation could reduce the harm those microplastics cause during anaerobic digestion used to produce biogas. The findings showed that PET and polypropylene microplastics alter methane yields from sludge digestion in concentration-dependent ways, and that ozone pretreatment partially mitigates the inhibition caused by polypropylene — though the interactions are complex and require further optimization before widespread use.
A review of mechanisms underlying the impacts of (nano)microplastics on anaerobic digestion
This review summarized mechanisms by which nano- and microplastics affect anaerobic digestion in wastewater treatment, covering inhibition and enhancement pathways, impacts on biogas production and methane yield, and effects on microbial community structure.
Effects of Different Microplastics on Methane Production and Microbial Community Structure in Anaerobic Digestion of Cattle Manure
Researchers tested how four types of microplastics affect methane production during anaerobic digestion of cattle manure. They found that polyethylene microplastics increased cumulative methane production by nearly 12% by enriching methane-producing microorganisms, while polyhydroxyalkanoate microplastics inhibited methane production by suppressing key methanogenic communities.
[Effects of Typical Microplastics on Methanogenesis and Antibiotic Resistance Genes in Anaerobic Digestion of Sludge].
Researchers explored the impacts of polyamide, polyethylene, and polypropylene microplastics on methanogenesis and antibiotic resistance gene dynamics during anaerobic digestion of waste sludge, examining how microplastic contamination affects both biogas production and resistance gene enrichment.
Unraveling synergistic cascade inhibition of methane production in anaerobic digestion system by polyethylene microplastics and domestic sewage: Physical adsorption, metabolic disruption, and microbial community decoupling
Researchers systematically explored how the co-presence of polyethylene microplastics and domestic sewage inhibits methane production in anaerobic digestion systems, finding that physical adsorption of microplastics, propionic acid accumulation, and microbial community decoupling identified via multi-omics analysis collectively suppressed cumulative CH4 production by 41.8% compared to controls.
Effects of polypropylene microplastics on digestion performance, microbial community, and antibiotic resistance during microbial anaerobic digestion
Researchers studied how polypropylene microplastics affect the anaerobic digestion process used to treat wastewater sludge. While small amounts of microplastics slightly increased methane production, they also promoted the spread of antibiotic resistance genes among bacteria in the digesters. This means microplastics in wastewater systems could contribute to the growing problem of antibiotic-resistant bacteria, which poses a serious threat to human health.
Unmasking microplastics in anaerobic digestion: Hidden threats, synergistic pollutants, and biodegradation Frontiers — A comprehensive hotspot review
Researchers reviewed how microplastics disrupt anaerobic digestion — the process used to convert organic waste into biogas — finding that microplastics suppress methane production, harm microbial communities, and carry along other pollutants like antibiotics and heavy metals into the system.
Size-dependent effects of polystyrene microplastics on anaerobic digestion performance of food waste: Focusing on oxidative stress, microbial community, key metabolic functions
Researchers investigated how polystyrene microplastics of different sizes affect anaerobic digestion of food waste and found that smaller particles caused greater inhibition of methane production, with reductions up to 33%. The study suggests that small microplastics induce more oxidative stress in microbial communities and suppress key enzymes involved in methane-producing metabolic pathways.
Entry pathways determined the effects of MPs on sludge anaerobic digestion system: The views of methane production and antibiotic resistance genes fates
Researchers examined how the entry pathway of microplastics into sludge affects anaerobic digestion performance and the fate of antibiotic resistance genes. They compared wastewater-derived microplastics with those entering through anaerobic digestion processes and found that the entry pathway significantly influenced both methane production and the spread of antibiotic resistance genes. The findings suggest that the source and history of microplastics in sewage sludge matter for downstream treatment outcomes.
An in-depth analysis of microbial response to exposure to high concentrations of microplastics in anaerobic wastewater fermentation
This study investigated how high concentrations of three common microplastic types affect the microbes used in anaerobic wastewater treatment, finding that microplastics reduced methane production by up to 56%. PVC had the most damaging effect on the microbial communities that break down waste, while polyethylene was somewhat less disruptive. The findings matter because impaired wastewater treatment means more pollutants, including microplastics themselves, could escape into waterways that feed human water supplies.