We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Papers
61,005 resultsShowing papers similar to Exploring the effects of polyethylene and polyester microplastics on biofilm formation, membrane Fouling, and microbial communities in Modified Ludzack-Ettinger-Reciprocation membrane bioreactors
ClearEffects of microplastics accumulation on performance of membrane bioreactor for wastewater treatment
Researchers simulated the long-term accumulation of polypropylene microplastics in membrane bioreactors used for wastewater treatment. They found that while microplastic accumulation did not reduce the removal of key pollutants like COD and ammonia nitrogen, it did increase membrane fouling and alter the composition of microbial communities in the reactor. The study suggests that microplastic buildup in wastewater treatment systems may affect operational efficiency over time.
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.
Effect of polypropylene microplastics on the performance of membrane bioreactors in wastewater treatment
Researchers studied how polypropylene microplastics affect membrane bioreactors, a type of wastewater treatment system. They found that while these systems can effectively filter out microplastics, higher concentrations and smaller particle sizes caused membrane clogging and reduced treatment efficiency over time, which is important for designing better wastewater treatment facilities.
Effects of microplastic accumulation on floc characteristics and fouling behavior in a membrane bioreactor
Researchers found that accumulating microplastics in membrane bioreactors over 124 days decreased sludge floc size, floc hydrophobicity, and extracellular polymeric substance molecular size while increasing EPS concentration and negative surface charge, altering microbial community composition and increasing membrane fouling severity.
Insight into effect of polyethylene microplastic on nitrogen removal in moving bed biofilm reactor: Focusing on microbial community and species interactions
Researchers studied how polyethylene microplastics affect nitrogen removal in wastewater treatment bioreactors and found that low concentrations slightly improved the process, while higher concentrations disrupted it. The microplastics changed the microbial communities responsible for breaking down nitrogen in wastewater. This matters because less effective wastewater treatment means more nitrogen pollution in waterways, and microplastics entering treatment plants could reduce their ability to clean water effectively.
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.
Investigating the impact of PVC microplastics on membrane fouling behavior in MBR for enhanced wastewater treatment efficiency
Researchers added PVC microparticles to a membrane bioreactor treating simulated urban wastewater and found that the microplastics unexpectedly improved COD removal from 84.76% to 92.48% while reducing membrane fouling rates, though effects on sludge and microbial communities require further investigation.
Impact of Nano- and Microplastics on Membrane Technology Performance
This thesis investigated the influence of model microplastic fibers on membrane technologies used in wastewater treatment, specifically crossflow ultrafiltration and membrane bioreactor systems, finding that microplastics minimally affected performance during the initial start-up phase. The findings suggest these membrane technologies are relatively resilient to microplastic contamination in early operation.
Impact of polyethylene microplastics on the nitrogen removal and bacterial community in sequencing batch reactor at different hydraulic retention times
Researchers examined how polyethylene microplastics affect nitrogen removal performance in biological wastewater treatment at different hydraulic retention times. The study found that the presence of microplastics amplified the negative effects of shortened treatment times on nitrogen removal efficiency and altered bacterial communities and enzyme levels involved in nitrification and denitrification, offering new insights into how microplastics interfere with wastewater treatment processes.
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.
Nitrogen removal performance of bioretention cells under polyethylene (PE) microplastic stress
Researchers investigated how polyethylene microplastics affect the nitrogen removal performance of bioretention cells used to filter stormwater runoff. The study found that microplastic accumulation reduced overall nitrogen removal efficiency by up to 28% while altering the microbial community structure responsible for denitrification.
Recent advances on micro/nanoplastic pollution and membrane fouling during water treatment: A review
Researchers reviewed recent advances in understanding how micro- and nanoplastics contribute to membrane fouling during water treatment processes. The study found that while membrane separation effectively removes microplastics from wastewater effluent, fouling caused by plastic particles along with dissolved organics and extracellular polymers remains a key obstacle, and understanding the fouling mechanisms is critical for improving treatment efficiency.
Microplastics shaped performance, microbial ecology and community assembly in simultaneous nitrification, denitrification and phosphorus removal process
This study found that polystyrene and PVC microplastics disrupted the performance of wastewater treatment systems designed to remove nitrogen and phosphorus, reducing nitrogen removal by up to 10%. The microplastics altered microbial communities, decreased cooperation between beneficial bacteria, and blocked important biological pathways. Since wastewater treatment is a key barrier against pollution reaching drinking water, microplastic interference with these systems could indirectly increase human exposure to harmful contaminants.
Towards microplastics contribution for membrane biofouling and disinfection by-products precursors: The effect on microbes
Researchers found that microplastics in raw water increased microbial growth and altered community composition during ultrafiltration, promoting extracellular polymer production that accelerated membrane fouling and elevated disinfection by-product formation in treated water.
Evaluation of Membrane Fouling by Microplastic Particles in Tertiary Wastewater Treatment Processes
Researchers evaluated membrane fouling caused by microplastic particles during tertiary wastewater treatment, finding that microplastics contributed to fouling through pore blocking and cake layer formation, which reduced membrane performance and treatment efficiency.
Treatment of Synthetic Wastewater Containing Polystyrene (PS) Nanoplastics by Membrane Bioreactor (MBR): Study of the Effects on Microbial Community and Membrane Fouling
This study treated synthetic wastewater containing polystyrene nanoplastics using membrane bioreactor technology, evaluating removal efficiency across operational conditions and examining how nanoplastics affect biological treatment performance.
[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.
Microplastics affect membrane biofouling and microbial communities during gravity-driven membrane filtration of primary wastewater
Researchers investigated how microplastics of different sizes and concentrations affect gravity-driven membrane filtration systems used for decentralized wastewater treatment. The study found that microplastics reduced permeate flux by 9 to 54% and altered biofilm microbial communities on the membrane surface, potentially compromising treatment performance.
Enhanced membrane fouling by microplastics during nanofiltration of secondary effluent considering secretion, interaction and deposition of extracellular polymeric substances
Researchers found that microplastics significantly worsen membrane fouling during nanofiltration of treated wastewater, increasing both short-term and long-term fouling resistance by up to 46% and 27% respectively. The study reveals that microplastics influence fouling through their effects on bacterial extracellular polymeric substance secretion, interaction with coexisting pollutants, and deposition on membrane surfaces.
Microplastics fouling and interaction with polymeric membranes: A review
This review examined microplastic fouling of polymeric membranes used in water treatment, analyzing how MPs affect membrane permeability and rejection performance, and discussing strategies — including surface modification and pre-treatment — to mitigate fouling.
The impact of PET microplastic fibres on PVDF ultrafiltration performance – A short-term assessment of MP fouling in simple and complex matrices
Researchers found that short PET microplastic nanofibers significantly foul polyvinylidene fluoride (PVDF) ultrafiltration membranes in wastewater treatment, with fouling effects amplified when combined with humic acid, highlighting a gap in current wastewater treatment plant removal capabilities.
Fouling behavior of nano/microplastics and COD, TOC, and TN removal in MBR: A comparative study
This study tested a membrane bioreactor (MBR) — a combination of biological treatment and membrane filtration used in wastewater plants — for its ability to remove nano- and microplastics from wastewater. The system achieved 99.4% removal of organic pollutants and complete removal of nanoplastics, and found that more hydrophilic membranes were better at capturing microplastics. The study also examined how microplastics foul and clog membranes over time, which is a practical challenge for wastewater treatment operations. These results support MBRs as a promising technology for reducing microplastic discharges from treatment plants into waterways.
Do Microplastics Affect Biological Wastewater Treatment Performance? Implications from Bacterial Activity Experiments
Researchers tested the effects of polyester, polyethylene, and polyvinylchloride microplastics at concentrations of 50-10,000 particles/L on the activities of key wastewater treatment bacteria, finding no statistically significant differences in the activity of ammonium-oxidising bacteria, nitrite-oxidising bacteria, denitrifiers, or polyphosphate-accumulating organisms. The study concludes that microplastics at tested concentrations do not meaningfully impair biological wastewater treatment performance.
Enhanced settling of microplastics after biofilm development: A laboratory column study mimicking wastewater clarifiers
Researchers found that biofilm development on microplastics significantly enhances their settling velocity in laboratory columns mimicking wastewater clarifiers, suggesting that biological fouling is an important mechanism for microplastic removal during wastewater treatment and sedimentation in water bodies.