Post Consumer Polyethylene Terephthalate (PET) Recycling in Bangladesh through Optimization of Hot Washing Parameters

Md. Shahadat Hossain, Dr. Salatul Islam Mozumder

Abstract


Most of the post consumer polyethylene terephthalate (pcrPET) is recycled conventionally in Bangladesh and subsequently produces inferior quality recycled PET flakes. Rest of the unused pcrPET is directly goes to the landfills which creates potential environmental hazard for Bangladesh. To get rid of environmental hazard and produce quality recycled PET flakes, pcrPET was mechanically recycled through hot washing. In hot washing different caustic soda and detergent dosage were used for pcrPET flakes effective decontamination. Later, spectrophotometric analysis and contamination test were carried out for recycled PET flakes characterization. Both of the analysis along with quality analysis confirmed together 3.0 percent caustic soda and 0.5 percent detergent dosage in hot washing at 90 °C temperature produce quality recycled PET flakes. Above optimum hot washing parameters effectively removed contaminants from pcrPET waste and finally produced quality recycled PET flakes for successive applications.


Keywords


PET recycling; Hot washing; Spectrophotometric analysis; Contamination test; Polyethylene terephthalate.

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