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Determination of large microplastics: wet-sieving of dewatered digested sludge, co-substrates, and compost
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This chapter from a book on large wastewater treatment plants describes wet-sieving methods for determining large microplastics in dewatered digested sludge, co-substrates, and compost. It addresses measurement challenges within the context of growing interest in microplastic monitoring at treatment facilities.
This book emphasizes the growing interest in the design and operation of large wastewater treatment plants throughout the past decades. The outstanding role of LWWTPs nowadays results from the shift of the world's population from rural to urbanized areas with centralized sewer systems. The urban population of the world has grown rapidly from 751 million in 1950 to 4.2 billion in 2018.Asia is home to 54% of the world's urban population, followed by Europe and Africa with 13% each. Today, 55% of the world's population lives in urban areas, a proportion that is expected to increase to 68% by 2050. Projections show that urbanization, combined with the overall growth of the world's population could add another 2.5 billion people to urban areas by 2050, with close to 90% of this increase taking place in Asia and Africa.Topics covered in this book include operational data and research centred around large-scale applications of innovative technologies and approaches; topics connected with the design and operation of LWWTPs, such as data acquisition for design purposes, application of mathematical models, nitrogen removal optimization and financial sustainability. Emerging topics of interest are also examined, such as the removal of micropollutants and microplastics, greenhouse gas emissions, activated sludge granulation and the effect of street thawing salt on plants.In Focus–a book series that showcases the latest accomplishments in water research. Each book focuses on a specialist area with papers from top experts in the field. It aims to be a vehicle for in-depth understanding and inspire further conversations in the sector.
More Papers Like This
Determination of large microplastics: wet-sieving of dewatered digested sludge, co-substrates, and compost
AI summary Read the abstract
This study tested wet-sieving as a method to quantify large microplastic particles (1-5 mm) in dewatered digested sewage sludge and compost, which can transfer microplastics to agricultural soils. Reliable measurement methods for microplastics in sludge are needed because land application of treated sewage is a major pathway for microplastic contamination of farmland.
Combined application of analytical techniques for microplastic determination to achieve comprehensive results for sewage sludge samples
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Researchers combined multiple analytical techniques for comprehensive microplastic determination in sewage sludge samples, addressing the challenge that more than 90% of microplastics entering wastewater treatment plants are retained in sludge and require robust multi-method characterization.
Combined application of analytical techniques for microplastic determination to achieve comprehensive results for sewage sludge samples
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Researchers applied a combination of complementary analytical techniques to achieve comprehensive microplastic characterization in sewage sludge samples, addressing the limitations of using single methods for such complex matrices. They found that more than 90% of microplastics entering wastewater treatment plants are retained in the resulting sludge, and that combining analytical approaches improved detection across size ranges and polymer types.
Occurrence of microplastic in municipal wastewater sludge
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This thesis developed and applied a procedure for detecting and identifying microplastics in municipal wastewater sludge, quantifying the amount and characteristics of plastic particles in Finnish sludge samples — relevant to understanding microplastic fate when sludge is applied to agricultural land.
A highly efficient multi-step methodology for the quantification of micro-(bio)plastics in sludge
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This study developed a multi-step method to quantify both conventional microplastics and starch-based bioplastic microparticles in sewage sludge. The method is important because bioplastic bags used in food waste collection may survive treatment processes and contaminate compost later applied to agricultural land.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.