Comparison of treatability of four different chlorophenol-containing wastewater by pyrite-Fenton process combined with aerobic biodegradation: Role of sludge acclimation

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dc.authorid-en_US
dc.authorid0000-0002-6309-0547en_US
dc.authorid0000-0001-9747-9115en_US
dc.authorscopusid57218629138en_US
dc.authorscopusid6701486470en_US
dc.authorscopusid8720170000en_US
dc.authorwosid-en_US
dc.authorwosidAAD-6953-2020en_US
dc.authorwosidABI-3823-2020en_US
dc.contributor.authorKayan, İremsu
dc.contributor.authorAyman Öz, Nilgün
dc.contributor.authorKantar, Çetin
dc.date.accessioned2025-01-02T12:00:35Z
dc.date.available2025-01-02T12:00:35Z
dc.date.issued2021en_US
dc.departmentFakülteler, Mühendislik Fakültesi, Çevre Mühendisliği Bölümü
dc.description.abstractAerobic biodegradation combined with pyrite-Fenton process was used for the treatment of wastewater containing different chlorophenols (4-CP, 2,3-DCP, 2,4-DCP, 2,4,6-TCP). Fenton degradation using pyrite as the low cost iron catalyst was used as a pre-treatment step to lower the toxicity of CPs prior to aerobic biodegradation. Synthetic wastewater spiked directly with either 100 mg/L CPs or pyrite-Fenton pre-treated CPs was fed to the batch bioreactors inoculated with unacclimated or acclimated activated sludge using glucose as the C-source. The results show that the CP biodegradation under aerobic conditions was highly dependent on the type of CP treated. Except for 2,4-DCP, all other CPs investigated caused severe sludge toxicity, and thus significantly hindered glucose degradation by unacclimated sludge. The CP toxicity decreased in the order of: 2,4,6-TCP > 2,3-DCP > 4-CP > 2,4-DCP. The toxic effect was explained through an interaction of CPs with the lipid fraction of cell membrane. While the pyrite-Fenton pre-treatment improved the COD removal efficiency using unacclimated sludge, the sCOD removal efficiency was still less than the control reactor operated with no CP addition. With sludge acclimation, however, the sCOD removal efficiencies increased, and approached 74% for 2,4-DCP, 61% for 4-CP, 56% for 2,4,6-TCP and 46% for 2,3-DCP, suggesting an enhanced biomass tolerance to CP toxicity. On the other hand, the sludge acclimation combined with pyrite Fenton pre-treatment provided the best bioreactor performance for all CPs with the sCOD removal efficiencies reaching 81% for 2,4,6-TCP, 78% for 2,4-DCP, 73% for 4-CP and 62% for 2,3-DCP. This suggests that the dechlorination of CPs with Fenton process, in conjunction with sludge acclimation, not only reduced the sludge toxicity, but also enhanced the bioavailability of CP-containing wastewater for microorganisms, especially for highly chlorinated toxic CPs such as 2,4,6-TCP. Overall, the findings highlight the need for sludge acclimation for effective treatment of chlorophenol-containing wastewater by a combined pyrite-Fenton and aerobic biodegradation system.en_US
dc.identifier.citationKayan, İ., Ayman Öz, N., & Kantar, C. (2021). Comparison of treatability of four different chlorophenol-containing wastewater by pyrite-Fenton process combined with aerobic biodegradation: Role of sludge acclimation. Journal of Environmental Management, 279, 111781. https://doi.org/10.1016/j.jenvman.2020.111781en_US
dc.identifier.doi10.1016/j.jenvman.2020.111781
dc.identifier.issn0301-4797
dc.identifier.issn1095-8630
dc.identifier.pmid33307317
dc.identifier.scopus2-s2.0-85097452919
dc.identifier.urihttps://doi.org/10.1016/j.jenvman.2020.111781
dc.identifier.urihttps://hdl.handle.net/20.500.12428/6813
dc.identifier.volume279en_US
dc.identifier.wosWOS:000608237500010
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.institutionauthorKayan, İremsu
dc.institutionauthorAyman Öz, Nilgün
dc.institutionauthorKantar, Çetin
dc.language.isoen
dc.publisherAcademic Pressen_US
dc.relation.ispartofJournal of Environmental Managementen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.relation.tubitakinfo:eu-repo/grantAgreement/TUBITAK/SOBAG/115Y329
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectBiodegradationen_US
dc.subjectChlorophenolen_US
dc.subjectPyrite-fentonen_US
dc.subjectSludge acclimationen_US
dc.subjectToxicityen_US
dc.titleComparison of treatability of four different chlorophenol-containing wastewater by pyrite-Fenton process combined with aerobic biodegradation: Role of sludge acclimation
dc.typeArticle

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