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A value-added insight of reusing microplastic waste: Carrier particle in fluidized bed bioreactor for simultaneous carbon and nitrogen removal from septic wastewater
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A value-added step towards promoting the serviceability of fluidized bed bioreactor in treating wastewater with low carbon to nitrogen ratio
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Researchers demonstrated that reusing waste zeolite and microplastics as composite carrier particles in a fluidized bed bioreactor improved nitrogen removal from wastewater with low carbon-to-nitrogen ratios. The study shows microplastic waste can be repurposed as functional materials in wastewater treatment.
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Researchers found that biological nutrient removal systems used in wastewater treatment can remove more than 95% of microplastics, but the final settling tank releases some particles back into treated water due to their low density. Adding a filtration step at the end of treatment could help prevent these remaining microplastics from entering waterways.
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This study compared seven digestion protocols and three separation methods for extracting microplastics from organic solid waste such as compost and biogas residues, identifying 30% hydrogen peroxide digestion followed by two-stage density separation as optimal with over 86% recovery. Standardized extraction methods are critical for generating comparable data on microplastic contamination in agricultural inputs that ultimately transfer plastic particles into soils.
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