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61,005 resultsShowing papers similar to Influence of polyether sulfone microplastics and bisphenol A on anaerobic granular sludge: Performance evaluation and microbial community characterization
ClearEvaluation of characteristics and microbial community of anaerobic granular sludge under microplastics and aromatic carboxylic acids exposure
Researchers exposed anaerobic granular sludge to polyether sulfone microplastics combined with aromatic carboxylic acids and found that both contaminants impaired sludge granule stability, reduced methane production, and shifted microbial community composition toward less efficient fermenters.
Evaluating effects of tetrabromobisphenol A and microplastics on anaerobic granular sludge: Physicochemical properties, microbial metabolism, and underlying mechanisms
Researchers investigated the combined effects of the flame retardant tetrabromobisphenol A and two types of microplastics on anaerobic granular sludge used in wastewater treatment. They found that co-exposure altered the physicochemical properties, microbial communities, and metabolic activity of the sludge. The study suggests that the interaction between microplastics and other emerging contaminants may compound their effects on wastewater treatment processes.
Response of aerobic granular sludge under polyethylene microplastics stress: Physicochemical properties, decontamination performance, and microbial community
Researchers investigated the impact of polyethylene microplastics on aerobic granular sludge used in wastewater treatment. The study found that microplastics significantly disrupted sludge structure, settling properties, and enzyme activities related to denitrification and phosphorus removal, with increased reactive oxygen species and cell membrane damage at higher concentrations.
Impact of Polyethylene Terephthalate Microplastics on Aerobic Granular Sludge Structure and EPS Composition in Wastewater Treatment
Researchers investigated how PET microplastics affect the structure and function of aerobic granular sludge used in wastewater treatment. Higher microplastic concentrations led to changes in granule size, altered the composition of extracellular polymeric substances, and shifted microbial community structure. The findings suggest that microplastic contamination in wastewater could compromise the stability and efficiency of biological treatment processes.
Impact of phenolic-formaldehyde resin microplastics on anaerobic granular sludge: EPS interaction mechanisms and impacts on reactor performance
Researchers studied how microplastics made from phenolic-formaldehyde resin affect wastewater treatment systems that use anaerobic granular sludge. They found that smaller microplastic particles provided new surfaces for bacteria to grow on, initially boosting treatment performance, but over time the increased microbial activity weakened the structure of the sludge granules. The study reveals a trade-off where microplastics can temporarily improve wastewater processing while ultimately destabilizing the treatment system.
The impacts of biodegradable and non-biodegradable microplastic on the performance and microbial community characterization of aerobic granular sludge
Researchers compared the effects of biodegradable polylactic acid microplastics and non-biodegradable polyethylene microplastics on aerobic granular sludge used in wastewater treatment. They found that high concentrations of both types impaired the sludge's ability to remove organic pollutants, but both actually enhanced nitrogen and phosphorus removal at moderate levels. The study reveals that even biodegradable microplastics can disrupt wastewater treatment processes in unexpected ways.
Exposure to polyamide 66 microplastic leads to effects performance and microbial community structure of aerobic granular sludge
Polyamide 66 microplastics were introduced into aerobic granular sludge bioreactors at varying concentrations, initially reducing contaminant removal efficiency but recovering to near-control levels by the end of the experiment. The study shows that while microplastics transiently disrupt biological wastewater treatment, the microbial community can adapt over time.
Response of aerobic granular sludge under acute inhibition by polystyrene microplastics: Activity, aggregation performance, and microbial analysis
Researchers investigated how different concentrations of polystyrene microplastics affect the performance of aerobic granular sludge used in wastewater treatment. The study found that increasing microplastic concentrations inhibited nitrogen removal rates and disrupted the microbial community structure within the sludge. Evidence indicates that microplastic contamination in wastewater can compromise the effectiveness of biological treatment processes.
Mechanisms underlying the detrimental impact of micro(nano)plastics on the stability of aerobic granular sludge: Interactions between micro(nano)plastics and extracellular polymeric substances
Researchers found that both micro- and nanoplastics at realistic concentrations harmed the performance of aerobic granular sludge, a technology used for wastewater treatment, by reducing its ability to remove nitrogen. The plastic particles interacted with the sticky substances that hold the sludge granules together, weakening their structural integrity. The study reveals a specific mechanism by which plastic pollution can undermine wastewater treatment systems that communities rely on for clean water.
Insights into the microbial response of anaerobic granular sludge during long-term exposure to polyethylene terephthalate microplastics
Researchers investigated how polyethylene terephthalate microplastics affect anaerobic granular sludge used in wastewater treatment over 84 days. The study found that at relatively low concentrations, PET microplastics had minimal impact, but at higher concentrations they disrupted the microbial community structure and reduced the efficiency of the anaerobic treatment process.
Micro- and nanoplastics in granular sludge systems: mechanisms of disruption, retention, and microbial adaptation in wastewater treatment technologies
This review examines how micro- and nanoplastics disrupt the biological systems used to treat wastewater, focusing on granular sludge technologies. Plastic particles damage the microbial communities that break down waste by causing oxidative stress and breaking apart the protective structures that hold bacteria together. This matters because if wastewater treatment becomes less effective due to plastic contamination, more pollutants including microplastics could pass through into waterways that supply drinking water.
Microplastics in granular sequencing batch reactors: Effects on pollutant removal dynamics and the microbial community
Researchers investigated how polyethylene and polyethylene terephthalate microplastics affect pollutant removal in granular sludge wastewater treatment reactors. They found that microplastic type and concentration influenced nitrogen, phosphorus, and organic compound removal rates, with PET particles showing a stronger tendency to accumulate within the biomass. The study indicates that microplastic contamination in wastewater treatment systems may compromise treatment efficiency and alter microbial community dynamics.
Impact of the concentration and type of microplastics on the treatment efficiency and biomass structure in aerobic granular sludge reactors
Researchers investigated how polyethylene terephthalate and polyethylene microplastics at varying concentrations affect treatment efficiency, granule morphology, extracellular polymer production, microbial species composition, and metabolic activity in aerobic granular sludge reactors used for wastewater treatment. The study tested four hypotheses regarding MP effects on both the biological performance and structural integrity of aerobic granular sludge as a promising technology for MP-contaminated wastewater.
Effects of degradable and non-degradable microplastics on SPNEDPR-AGS system: Sludge characteristics, nutrient transformation, key enzyme, and microbial community
Researchers examined how degradable and non-degradable microplastics affect an aerobic granular sludge (AGS) wastewater treatment system, measuring impacts on granule formation, microbial community, and treatment performance. Degradable microplastics caused more pronounced disruption to the AGS system than conventional non-degradable plastics.
Effects of exposure to polyether sulfone microplastic on the nitrifying process and microbial community structure in aerobic granular sludge
Scientists added polyether sulfone microplastics to aerobic granular sludge bioreactors at different concentrations and found only minor effects on ammonia removal but an increase in total nitrogen removal efficiency of 5.6%, along with shifts in nitrifying microbial community structure.
Microbial and physicochemical responses of anaerobic hydrogen-producing granular sludge to polyethylene micro(nano)plastics
Researchers found that polyethylene micro- and nanoplastics disrupted anaerobic hydrogen-producing granular sludge in a concentration- and size-dependent manner, inhibiting microbial activity and altering community structure, with nanoplastics causing greater harm than larger microplastic particles.
Revealing the influencing mechanisms of polystyrene microplastics (MPs) on the performance and stability of the algal-bacterial granular sludge
Researchers investigated how polystyrene microplastics affect algal-bacterial granular sludge used in wastewater treatment, finding that the sludge removed over 96% of incoming microplastics but that microplastics inhibited COD removal by 2.6 to 4.1% and total phosphorus removal by 2.9 to 5.8%. Structural stability was compromised through oxidative stress, altered protein composition, and reduced abundance of key functional bacteria.
Effects of microplastics on the properties of different types of sewage sludge and strategies to overcome the inhibition: A review
This review examined how microplastics trapped in sewage sludge during wastewater treatment affect sludge properties, microbial communities, and treatment efficiency, while discussing strategies to overcome microplastic-induced inhibition of sludge processing.
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.
Deciphering the inhibition mechanisms of microplastics on the full-stage sludge anaerobic digestion via enrichment to anaerobic microbes and toxicity of released compounds
This study found that microplastics in sewage sludge significantly interfere with the waste treatment process by reducing the activity of key microorganisms needed to break down waste. More than half of the negative effect came from toxic chemicals released when microplastic particles rub against sludge, and the disrupted treatment also increased the risk of spreading antibiotic-resistant bacteria.
Effects of microplastics on substance transformation, sludge characteristics, toxicological effect, and microbial communities in different biochemical sludge systems: A review
This review synthesizes evidence that microplastics impair the biological and physical processes in wastewater treatment sludge systems, inhibiting nutrient removal, disrupting microbial communities, and degrading sludge structure—with smaller particles and higher concentrations causing greater damage. Because sludge is widely applied to agricultural land, any microplastic-driven impairment of treatment efficiency also increases the risk of plastic particles and associated pollutants reaching soils and food crops.
Insight into effects of polyethylene microplastics in anaerobic digestion systems of waste activated sludge: Interactions of digestion performance, microbial communities and antibiotic resistance genes
Polyethylene microplastics in anaerobic digestion systems processing waste activated sludge increased hydrolysis efficiency at 1 mm particle sizes but also altered microbial community composition and enriched antibiotic resistance genes. The findings suggest that MPs in sludge management pose risks for spreading ARGs through land application of digested biosolids.
[Change in Granulation Potential and Microbial Enrichment Characteristics of Sludge Induced by Microplastics].
This study found that polyethylene terephthalate (PET) microplastics accelerate the formation of granular sludge in wastewater treatment plants by increasing sticky protein secretions, but continuous exposure ultimately degrades treatment performance and disrupts the microbial communities responsible for removing nitrogen. This matters because it suggests microplastics entering sewage systems could compromise the efficiency of the very facilities designed to filter them out.
Synergistic analysis of performance, microbial community, and metabolism in aerobic granular sludge under polyacrylonitrile microplastics stress
Researchers found that low concentrations of polyacrylonitrile microplastics had minimal impact on aerobic granular sludge wastewater treatment, but 100 mg/L severely damaged granule structure and inhibited denitrification and membrane transport gene expression.