Caustic recovery from caustic-containing polyethylene terephthalate (PET) washing wastewater generated during the recycling of plastic bottles

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dc.contributor.authorAlterkaoui, Aya
dc.contributor.authorEskikaya, Ozan
dc.contributor.authorKeskinler, Bulent
dc.contributor.authorDizge, Nadir
dc.contributor.authorBalakrishnan, Deepanraj
dc.contributor.authorHiremath, Pavan
dc.contributor.authorNaik, Nithesh
dc.date.accessioned2025-03-17T12:25:54Z
dc.date.available2025-03-17T12:25:54Z
dc.date.issued2025
dc.departmentTarsus Üniversitesi
dc.description.abstractTo prevent water scarcity, wastewater must be discharged to the surface or groundwater after being treated. Another method is to reuse wastewater in some areas after treatment and evaluate it as much as possible. In this study, it is aimed to recover and reuse the caustic (sodium hydroxide, NaOH) used in the recycling of plastic bottles from polyethylene terephthalate (PET) washing wastewater. Chemical substances used in the industry will be significantly reduced with chemical recovery from wastewater. Ultrafiltration (UP150) and nanofiltration (NP010 and NP030) membranes were used for this purpose in our study. Before using nanofiltration membranes, pre-treatment was performed with coagulation-flocculation process to reduce the pollutant accumulation on the membranes. Different coagulants and flocculants were used to find suitable coagulants and flocculants in pre-treatment. The pre-treated wastewater using aluminum oxide, which supplied the highest chemical oxygen demand (COD) removal (76.0%), was used in a dead-end filtration system to be filtered through NP010 and NP030 membranes at different pressures (10-30 bar). In the same filtration system, raw wastewater was filtered through a UP150 membrane. Among these treatment scenarios, the best method that could remove pollutants and provide NaOH recovery was selected. After each treatment, pH, conductivity, COD, and NaOH analyses were performed. The maximum NaOH recovery (98.6%) was obtained with the UP150 membrane at 5 bar.
dc.description.sponsorshipManipal Academy of Higher Education, Manipal
dc.description.sponsorshipOpen access funding provided by Manipal Academy of Higher Education, Manipal. This research received no specific grants from any funding agency in the public, commercial, or not-for-profit sectors.
dc.identifier.doi10.1038/s41598-025-85365-9
dc.identifier.issn2045-2322
dc.identifier.issue1
dc.identifier.pmid39849034
dc.identifier.scopus2-s2.0-85216717964
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1038/s41598-025-85365-9
dc.identifier.urihttps://hdl.handle.net/20.500.13099/1914
dc.identifier.volume15
dc.identifier.wosWOS:001405679100031
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherNature Portfolio
dc.relation.ispartofScientific Reports
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250316
dc.subjectPET washing wastewater
dc.subjectCoagulation-flocculation
dc.subjectUltrafiltration
dc.subjectNanofiltration
dc.subjectNaOH recovery
dc.subjectWastewater recycling
dc.titleCaustic recovery from caustic-containing polyethylene terephthalate (PET) washing wastewater generated during the recycling of plastic bottles
dc.typeArticle

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