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61,005 resultsShowing papers similar to Role of microparticles on the filamentous bulking of activated sludge
ClearEffect of polyethylene terephthalate particles on filamentous bacteria involved in activated sludge bulking and improvement in sludge settleability
Researchers found that adding small polyethylene terephthalate (PET) microplastic particles to activated sludge significantly reduced filamentous bacteria populations and improved sludge settling properties, offering insights for addressing bulking problems in tannery wastewater treatment.
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.
[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.
The Effects of Microplastics on Floc Formation, Nutrient Removal and Settleability in Wastewater Treatment
Researchers investigated how microplastics affect floc formation, nutrient removal, and settleability in wastewater treatment systems, examining the mechanisms by which these ubiquitous anthropogenic pollutants entering via packaging, cosmetics, and other production sectors disrupt activated sludge processes.
The Effects of Microplastics on Floc Formation, Nutrient Removal and Settleability in Wastewater Treatment
Researchers examined the interactions of microplastics with activated sludge in wastewater treatment plants, investigating effects on floc formation, nutrient removal efficiency, and settleability to understand how microplastic contamination may compromise treatment performance.
Long-term impacts of polyethylene terephthalate (PET) microplastics in membrane bioreactor
Researchers evaluated the long-term impact of PET microplastics on membrane bioreactor performance for wastewater treatment. The study found that while biological removal efficiency remained largely unaffected, the accumulation of PET particles adversely impacted sludge settling and dewatering properties and increased extracellular polymer production, suggesting long-term operational concerns for treatment facilities.
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.
Aged microplastic fibers induce activated sludge bulking: A new non-filamentous bulking behavior in sequencing batch reactors
Researchers found that aged microplastic fibers at 10 mg/L caused severe non-filamentous sludge bulking in sequencing batch reactors — with a sludge volume index of 280 mL/g and up to 40% reduction in contaminant removal — due to enhanced biofilm adhesion and selective enrichment of polysaccharide-secreting bacteria that formed viscous extracellular polymeric substances.
Effects of microplastics on granular sludge: A review
This review examined how microplastics affect granular sludge properties and wastewater treatment efficiency in biological treatment systems, with wastewater plants considered major sinks for microplastics. The review found that harmful effects on granular characteristics are closely associated with microplastic size and concentration, summarizing how MPs disrupt granule formation and settleability.
Analysis of the potential role of microplastics as transporters of microorganisms in activated sludge
Researchers investigated whether microplastic microbeads present in wastewater can support microbial biofilm formation and facilitate the spread of microorganisms in activated sludge treatment systems. Microplastics from multiple polymer types readily hosted biofilm development, with bacterial communities differing between plastic types, suggesting microplastics can serve as microbial vectors in wastewater treatment.
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.
Impact and mechanism of polyethylene terephthalate microplastics with different particle sizes on sludge anaerobic digestion
Researchers examined how polyethylene terephthalate (PET) microplastics of different particle sizes and physical aging states affect anaerobic digestion of municipal wastewater treatment sludge, conducting comparative experiments to elucidate the impact mechanisms. They found that PET microplastics accumulated in sludge alter the digestion process, with particle size influencing the degree of disruption to microbial activity and biogas production.
Wastewater treatment alters microbial colonization of microplastics
Analysis of microplastics and their biofilms across raw sewage, effluent, and sludge at two wastewater treatment plants found that >99% of influent MPs were retained in sludge, and that wastewater treatment substantially altered biofilm microbial composition, enriching bioflocculation-associated taxa.
Effects of polyethylene terephthalate microplastics on performance of sequencing-batch membrane bioreactor for simulated municipal wastewater treatment
Researchers assessed the impact of PET microplastics on a sequencing-batch membrane bioreactor treating simulated municipal wastewater and found that PET MPs altered microbial community composition, reduced treatment efficiency at higher concentrations, and increased membrane fouling. The study highlights risks to wastewater infrastructure from microplastic contamination.
The entering of polyethylene terephthalate microplastics into biological wastewater treatment system affects aerobic sludge digestion differently from their direct entering into sludge treatment system
Researchers found that PET microplastics entering a biological wastewater treatment system before the sludge treatment stage affected aerobic sludge digestion differently than microplastics added directly to the sludge, highlighting that the treatment pathway determines the nature of microplastic impacts on sludge processing systems.
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.
Microplastics in real wastewater treatment schemes: comparative assessment and relevant inhibition effects on anaerobic processes
Researchers investigated microplastic occurrence and removal in an Italian wastewater treatment plant, finding 3.6 MPs/L in influent dominated by polyester fibers, with conventional activated sludge achieving 86% removal, and demonstrating that concentrated sludge-associated microplastics can inhibit downstream anaerobic digestion.
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.
Behavior and flow of microplastics during sludge treatment in Japan
Sampling of two Osaka wastewater treatment plants found microplastics at every stage of the sludge treatment process, with 13 polymer types identified; concentration increased through dewatering, but the total MP load in final biosolids was lower than in raw sludge.
Circulation of microplastics in a municipal wastewater treatment plant with multiphase activated sludge
Researchers tracked the circulation of microplastics through a municipal wastewater treatment plant, from raw wastewater through sludge processing. They found that most microplastics accumulated in sewage sludge at high concentrations, and that leachate from sludge treatment recycled microplastics back into the treatment process. The study highlights how wastewater treatment plants can inadvertently redistribute microplastics rather than fully removing them from the waste stream.
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.
Fate of microplastics in wastewater treatment plants and their environmental dispersion with effluent and sludge
Researchers tracked microplastics through a wastewater treatment plant and found 12 different polymer types in effluents and sludge, with smaller particles (25–104 μm) most abundant and fibres displaying lower sizes than fragments. The study demonstrates that WWTPs do not fully remove microplastics and that processed sludge marketed as soil amendment carries plastic contamination.
Biodegradation of Poly(Ethylene Terephthalate) Microplastics by Baceterial Communities From Activated Sludge
Scientists isolated bacteria from wastewater treatment sludge that can biodegrade PET plastic, used in plastic bottles and food packaging. The bacteria broke down PET microplastics over a 60-day period, pointing toward a potential biological tool for removing plastic contamination from water treatment systems.
Biodegradation of Poly(Ethylene Terephthalate) Microplastics by Baceterial Communities From Activated Sludge
Scientists isolated bacteria from wastewater treatment sludge that can biodegrade PET plastic, used in plastic bottles and food packaging. The bacteria broke down PET microplastics over a 60-day period, pointing toward a potential biological tool for removing plastic contamination from water treatment systems.