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61,005 resultsShowing papers similar to Evaluating the Effects of Different Pretreatments on Anaerobic Digestion of Waste Activated Sludge Containing Polystyrene Microplastics
ClearEvaluation the impact of polystyrene micro and nanoplastics on the methane generation by anaerobic digestion
Researchers tested the effect of polystyrene microplastics and their leached chemical additives on anaerobic digestion systems, finding that microplastic presence reduced methane generation efficiency and disrupted microbial community function.
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.
Thermal hydrolysis alleviates polyethylene microplastic-induced stress in anaerobic digestion of waste activated sludge
Scientists found that pretreating waste sludge with heat before anaerobic digestion reduced the negative effects that polyethylene microplastics have on the process. The thermal treatment improved methane production and helped maintain healthy microbial communities even in the presence of microplastics. The study suggests that thermal hydrolysis could be a practical strategy for wastewater treatment plants dealing with microplastic-contaminated sludge.
Sludge Thermal Hydrolysis for Mitigating Oxidative Stress of Polystyrene Nanoplastics in Anaerobic Digestion: Significance of the Solids Content
Thermal hydrolysis pretreatment of sewage sludge mitigated the oxidative stress caused by polystyrene nanoplastics in anaerobic digestion, with effectiveness varying by sludge solids content - reactive oxygen species increases were lower at 12% than at 4-8% total solids, improving methane production.
Polystyrene microplastics and nanoplastics distinctively affect anaerobic sludge treatment for hydrogen and methane production
Researchers found that polystyrene microplastics and nanoplastics have distinct effects on anaerobic sludge treatment, with nanoplastics generally inhibiting both hydrogen and methane production while microplastics could actually promote hydrogen generation under certain conditions.
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.
Impact of alkaline thermal hydrolysis on anaerobic digestion of mixed sludge contaminated with microplastics
Researchers tested alkaline thermal hydrolysis pretreatment on sludge containing polyethylene and PVC microplastics before anaerobic digestion, finding that the pretreatment altered how microplastics affected subsequent methane production, with effects varying by polymer type and concentration.
Exposure to polystyrene nanoplastic leads to inhibition of anaerobic digestion system
Researchers showed that polystyrene nanoplastics inhibit methane production in sewage sludge digesters in a concentration-dependent manner, reducing methane yield by up to 14% and delaying the process start-up while shifting microbial community composition away from key methane-producing archaea.
Microplastics in sewage sludge destined to anaerobic digestion: The potential role of thermal pretreatment
Researchers found that thermal pretreatment of sewage sludge at 120°C did not degrade conventional PET microplastics but did alter biodegradable microplastics, which also boosted methane production during anaerobic digestion, raising concerns about how different microplastic types behave in sludge treatment.
Thermal Hydrolysis of Sludge Counteracts Polystyrene Nanoplastics-Induced Stress during Anaerobic Digestion
Thermal hydrolysis pretreatment of sewage sludge was found to counteract oxidative stress and process inhibition caused by polystyrene nanoplastics during anaerobic digestion, improving biogas production and microbial community resilience. The results suggest thermal hydrolysis as a practical strategy to protect anaerobic digestion systems from nanoplastic-induced disruption.
Revealing 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 polystyrene microplastics on the volatile fatty acids production from waste activated sludge fermentation
Researchers studied how different concentrations of polystyrene microplastics affect volatile fatty acid production during anaerobic fermentation of waste activated sludge. Low microplastic concentrations significantly increased fatty acid production by enhancing solubilization and enzyme activity, while high concentrations decreased production by suppressing microbial activity. The findings suggest that microplastic contamination levels in wastewater sludge can either promote or hinder resource recovery depending on concentration.
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.
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.
Can low-temperature thermal hydrolysis mitigate the oxidative stress of polystyrene nanoplastics on anaerobic digestion?
This study examined whether low-temperature thermal hydrolysis pretreatment can reduce the oxidative stress caused by polystyrene nanoplastics on the anaerobic microbiome in sewage sludge digestion. Results indicated that thermal hydrolysis mitigated nanoplastic-induced inhibition of anaerobic digestion performance.
MicroplasticDegradation through Thermal Hydrolysisin Sewage Sludge and Its Impact on the Anaerobic Process
Researchers investigated the fate of microplastics in sewage sludge during thermal hydrolysis pretreatment and found that temperatures of 140-180°C significantly degraded microplastics while also affecting subsequent anaerobic biogas production from the treated sludge.
Different sizes of polystyrene microplastics induced distinct microbial responses of anaerobic granular sludge
Researchers exposed anaerobic granular sludge used in wastewater treatment to polystyrene microplastics of different sizes, ranging from 0.5 to 150 micrometers. They found that larger particles caused progressively greater inhibition of methane production, with distinct microbial community shifts depending on particle size. The study reveals that microplastic size is an important factor in determining the severity of disruption to anaerobic wastewater treatment processes.
Deciphering the inhibitory mechanisms of polystyrene microplastics on thermophilic methanogens from the insights of microbial metabolite profiling and metagenomic analyses
Researchers studied how polystyrene microplastics affect methane production during the thermophilic anaerobic digestion of food waste. They found that increasing microplastic concentrations reduced methane yield by up to 47.8%, driven by the accumulation of reactive oxygen species that inhibited key enzymes in the digestion process. Metagenomic analysis revealed that microplastics downregulated genes involved in methane metabolism, providing new insights into how plastic contamination can disrupt waste treatment systems.
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.
Uncovering the toxic effects and adaptive mechanisms of aminated polystyrene nanoplastics on microbes in sludge anaerobic digestion system: Insight from extracellular to intracellular
Researchers investigated how nanoplastics with amino functional groups affect the anaerobic digestion process used to treat sewage sludge. They found that these surface-modified nanoplastics reduced methane production and disrupted the microbial communities responsible for breaking down waste. The study reveals that chemically modified nanoplastics may be more disruptive to wastewater treatment processes than unmodified particles.
Polystyrene nanoplastics shape microbiome and functional metabolism in anaerobic digestion
Researchers studied how polystyrene nanoplastics and microplastics affect the microbial communities and biochemical processes in anaerobic digestion systems used for waste treatment. They found that nanoplastics had a more disruptive effect than microplastics, significantly altering the composition and metabolic functions of the microbial community. The study suggests that plastic contamination in waste streams could reduce the efficiency of anaerobic digestion, a widely used waste processing technology.
Adaptation responses of microalgal-bacterial granular sludge to polystyrene microplastic particles in municipal wastewater
Researchers found that polystyrene microplastics of varying sizes did not significantly impair organic, ammonia, or phosphorus removal in microalgal-bacterial granular sludge systems treating municipal wastewater, though the microplastics did alter microbial community composition.
Impact of preozonation on biogas potential of PVC microplastics-containing waste sludge
Researchers evaluated the impact of preozonation on anaerobic digestion of wastewater sludge contaminated with PVC microplastics, measuring biogas and methane yields to determine whether ozone pretreatment could overcome the inhibitory effect that insoluble PVC particles exert on sludge-degrading microorganisms.
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.