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61,005 resultsShowing papers similar to Assessment of Microplastics in a Municipal Wastewater Treatment Plant with Tertiary Treatment: Removal Efficiencies and Loading per Day into the Environment
ClearAssessment of Microplastics in a Municipal Wastewater Treatment Plant With Tertiary Treatment: Removal Efficiencies and Loading Per Day Into the Environment
Researchers measured microplastic removal efficiency at a Spanish wastewater treatment plant with advanced tertiary treatment, finding it removed about 97% of incoming microplastics but still discharged an estimated 4.6 million microplastic particles per day into the environment. Even high-efficiency treatment plants release substantial microplastic loads into receiving waters.
Quantification and Characterization of Microplastics in Seven Urban Wastewater Treatment Plants
Wastewater treatment plants are a key pathway through which microplastics enter rivers and coastal waters, and this six-month study across seven Spanish treatment plants found that conventional processes offer inconsistent and often inadequate protection. Microplastics were present in all samples, and in some cases effluent concentrations were nearly as high as influent concentrations — meaning the plants were adding little removal value for plastic particles. The dominance of synthetic fibers and the seasonal variation observed point to the need for better tertiary treatment steps to capture microplastics before discharge.
Abundance and Characterization of Anthropogenic Microlitter in Effluent from Three Wastewater Treatment Plants in Gran Canaria (Canary Islands, Spain)
Researchers measured microplastic particles in effluent from three wastewater treatment plants on Gran Canaria, finding that effluent treatment level significantly affected how many particles were released into the environment. Even advanced membrane bioreactor treatment did not completely eliminate microlitter, meaning wastewater plants remain a significant source of microplastics entering aquatic environments.
Average daily flow of microplastics through a tertiary wastewater treatment plant over a ten-month period
A ten-month monitoring study of a tertiary wastewater treatment plant found a consistent daily flow of microplastics through the system, with removal efficiencies varying by particle type and treatment stage but never reaching 100%. The study quantifies the ongoing microplastic release from treated wastewater effluent over an extended period, providing realistic estimates for annual discharge loads.
Influence of wastewater treatment process on pollution characteristics and fate of microplastics
Researchers investigated microplastic abundance and removal efficiency across four wastewater treatment plants using different treatment technologies, finding influent concentrations between 539 and 1,290 particles per liter that were reduced substantially by primary and secondary treatment. Smaller microplastic particles proved hardest to remove and most likely to persist in final effluent.
Effectiveness of conventional municipal wastewater treatment plants in microplastics removal: Insights from multiple analytical techniques
Researchers evaluated the effectiveness of conventional municipal wastewater treatment plants in removing microplastics across multiple treatment stages, finding removal efficiencies of 70–90% but documenting that billions of particles still pass through in final effluent daily.
Microplastic retention in small and medium municipal wastewater treatment plants and the role of the disinfection
Researchers measured how effectively small and medium wastewater treatment plants removed microplastics at each treatment stage, including disinfection. Treatment plants removed over 95% of incoming microplastics, but the disinfection step (UV or chlorination) had minimal effect on particle removal. The bulk of microplastics that do pass through treatment are concentrated in sludge, which when spread on farmland returns microplastics to agricultural soils.
Characterization and removal efficiencies of microplastics discharged from sewage treatment plants in Southeast Spain
This four-year study of sewage treatment plants in southeast Spain found that while the plants removed 64 to 89 percent of microplastics, significant amounts still escaped into the environment. Advanced treatment was less effective at catching fibers compared to other particle shapes, and more microplastics of smaller sizes were found in autumn samples. The findings confirm that wastewater treatment plants are a major ongoing source of microplastic pollution entering waterways that communities depend on.
Presence of Microplastic in Erzurum Urban Wastewater Treatment Plant
Researchers investigated microplastic presence at the inlet and outlet of the Erzurum Urban Wastewater Treatment Plant in Turkey, finding average concentrations of 36,400 MP/m3 in influent and 2,875 MP/m3 in effluent. Tertiary treatment achieved over 90% removal efficiency, while primary and secondary treatment alone proved insufficient for effective microplastic removal.
Occurrence and Removal of Microplastics in Wastewater Treatment Plants: Perspectives on Shape, Type, and Density
Researchers compiled data from multiple countries on microplastic removal efficiency across different stages of wastewater treatment plants. They found that removal rates varied widely, from 48% in some facilities to over 90% in others, depending on the treatment technologies employed. The study suggests that while conventional wastewater treatment can capture a significant portion of microplastics, advanced tertiary treatment methods are needed to further reduce discharge into the environment.
A study on characteristics of microplastic in wastewater of South Korea: Identification, quantification, and fate of microplastics during treatment process
Microplastics were tracked through three South Korean wastewater treatment plants with different tertiary treatment methods, finding 75–92% removal by primary and secondary treatment and over 98% removal after tertiary treatment. The study confirms that advanced treatment steps are necessary to approach near-complete microplastic removal from municipal wastewater.
Evaluation of microplastic removal efficiency of wastewater-treatment plants in a developing country, Vietnam
Researchers evaluated microplastic removal efficiency at four wastewater treatment plants in Vietnam, finding removal rates of 92-99% but substantial daily microplastic loads still entering receiving waters through effluent discharge.
Microplastics in an urban wastewater treatment plant: The influence of physicochemical parameters and environmental factors
Microplastics were quantified across four treatment stages of an urban wastewater treatment plant, finding an overall 90.3% removal efficiency with fragments and fibers dominating the final effluent, and identifying rainfall events and seasonal variation as significant factors affecting MP concentrations. The study highlights the importance of environmental variables when monitoring MP removal at WWTPs.
Microplastics in wastewater treatment plants: Sources, properties, removal efficiency, removal mechanisms, and interactions with pollutants
This review examines microplastic sources, properties, removal efficiency, and removal mechanisms across different wastewater treatment plant stages. Researchers found that while treatment plants remove a significant portion of microplastics, they cannot eliminate them entirely, resulting in the continued release of millions of particles into the environment daily through effluent and sludge.
Research progress on microplastics in wastewater treatment plants: A holistic review
This review provides a holistic assessment of microplastics in wastewater treatment plants, covering sampling methods, occurrence patterns across treatment stages, removal efficiencies, and the environmental risks posed by microplastic discharge through effluent and sludge.
Occurrence and Removal of Microplastics in Tertiary Wastewater Treatment Plants: A Case Study of Three Plants in Zhengzhou, China
Researchers studied microplastic occurrence and removal efficiency at three wastewater treatment plants in Zhengzhou, China. The study found influent concentrations ranging from 147 to 289 particles per liter, with removal efficiencies between 76% and 91%, indicating that while treatment plants significantly reduce microplastic levels, substantial quantities still pass through to receiving waters.
Microplastics in Wastewater Treatment Plants: Characteristics, Occurrence and Removal Technologies
This review summarizes how wastewater treatment plants are a major pathway for microplastics entering the environment, covering the types, sizes, and sources of microplastics found in wastewater. While treatment plants can remove many microplastics, significant amounts still escape into rivers and oceans through treated water and sludge. The authors evaluate various removal technologies and recommend advanced treatment methods to better prevent microplastics from reaching water supplies.
Occurrence, Characteristics, and Removal of Microplastics in Wastewater Treatment Plants
This review summarizes the occurrence, characteristics, and removal efficiency of microplastics in wastewater treatment plants, highlighting how these facilities simultaneously act as sinks trapping microplastics and as sources releasing them into surrounding aquatic and terrestrial environments.
Microplastics removal through water treatment plants: Its feasibility, efficiency, future prospects and enhancement by proper waste management
Researchers reviewed over 80 studies on water treatment plant performance and found microplastic removal ranges widely — from 16% in basic primary treatment up to near 100% with advanced membrane systems — but a major flaw is that removed microplastics concentrate in sludge, which can re-enter the environment. The review recommends optimizing coagulants and sludge treatment to prevent microplastics from simply being relocated rather than eliminated.
Unraveling microplastics removal in wastewater treatment plant: A comparative study of two wastewater treatment plants in Thailand
Researchers compared microplastic removal efficiency at two wastewater treatment plants in Bangkok, finding that a facility equipped with ultrafiltration as a final polishing step achieved substantially higher microplastic removal than conventional treatment alone.
Microplastics removal in wastewater treatment plants: a critical review
This critical review of microplastic removal in wastewater treatment plants examines removal efficiencies across different treatment stages, finding that while WWTPs remove the majority of microplastics from influent, they still release millions of particles daily and are a major pathway for microplastics entering aquatic environments.
Characteristics and removal efficiency of microplastics at secondary wastewater treatment plant in Lithuania
A three-month study at a Lithuanian secondary wastewater treatment plant found microplastics at every stage of treatment, with the plant removing a substantial portion but still releasing significant quantities to the environment. Fiber was the most common shape, and the data help fill a geographic gap for northeastern Europe, where microplastic monitoring in wastewater systems has been limited.
Recent advances on microplastics pollution and removal from wastewater systems: A critical review
This review summarizes the latest research on microplastic detection, occurrence, and removal in wastewater treatment plants. While treatment plants can remove 57-99% of microplastics depending on the stage, significant amounts still escape into the environment through treated water and sludge. The findings highlight the need for advanced treatment methods to prevent microplastics from reaching waterways and ultimately human water supplies.
Understanding microplastic presence in different wastewater treatment processes: Removal efficiency and source identification
Researchers tracked microplastic removal across different treatment stages at two wastewater treatment plants and found overall removal rates of 90% and 97%. They discovered that population density in the served area was a bigger driver of influent microplastic levels than sewage volume, and that activated sludge served as the primary trap for captured particles. The study identified laundry washing and daily consumer products as the main sources of microplastics entering the treatment plants.