Enhancing sludge conditioning and dewatering characteristics by active surfaces modified with fast recombining immobilized nanoparticles

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dc.contributor.authorTunçal, Tolga
dc.date.accessioned2022-05-11T14:17:31Z
dc.date.available2022-05-11T14:17:31Z
dc.date.issued2021
dc.departmentFakülteler, Çorlu Mühendislik Fakültesi, Çevre Mühendisliği Bölümü
dc.description.abstractNichrome is a composite of nickel chromium alloys and commonly used as resistance wire for heating equipment. In this study, ability of multilayered heterojunctions between Cr+3-TiO2 and Ni2+-TiO2 nanoparticles to disintegrate acidified slurry sludge was investigated experimentally. Recombination and photoactivity of the Cr3+ and Ni2+ nanoparticles were optimized alternating their atomic mass fractions in the nanocomposites by their heating ability, using a central composite statistical design approach. Effects of the applied method on sludge conditioning, stabilization, and drying behaviors were systematically investigated. Temperature increase (Delta T) at the highest volatile suspended solids (VSS) oxidation level in the treated sludge samples were 2 +/- 1 degrees C, 5 +/- 1 degrees C, and 20 +/- 1 degrees C for UV C + H2O2-no catalyst, pure and Cr-Ni-TiO2 thin films (TFs), respectively. Obtained results also indicated that the modified TiO2 nanoparticles were able to decrease sludge bound water content by 45 +/- 1% efficiency. Cr3+ and Ni+2 co-doped TF functioned to decrease the unit drying energy from 236 +/- 10 kJ kg(-1) H2Oevaporated to 140 +/- 10 kJ kg(-1) H2Oevaporated. Drying profiles of raw and treated the sludge samples were fitted to Henderson and Pabis Model. Drying constants (k) for raw and treated sludge samples by pure TiO2 and Cr-Ni-TiO2 TFs were found to be 0.11 +/- 0.01 min(-1), 0.12 +/- 0.01 min(-1), and 0.19 +/- 0.01 min(-1), respectively. VSS degradation followed pseudo-first-order reaction kinetics in the all assayed conditions and pseudo-first-order reaction rates (k(obs)) for pure and the modified TFs were determined as 6 x 10(-4) min(-1) and 4 x 10(-3) min(-1), respectively. 2,2 ',5-Trichlorobphennyl, 2,2 ',5,5 '-Tetrachlorobiphenyl, 2,3 ',4,4 ',5-Pentachlorobiphenyl, and 2,2 ',3,4,4,5,5 '-Heptachlorobiphenyl were detected in raw sludge and after the photocatalytic oxidation through Cr3+ and Ni2+ co-doped TiO2 TF reactor, their total concentration was reduced from 4.36 mg kg(-1) to 9.76 x 10(-3 )mg kg(-1).
dc.description.sponsorshipScientific and Technological Research Council of Turkey T_UB_ITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [111Y209]
dc.description.sponsorshipThis work is founded by The Scientific and Technological Research Council of Turkey T_UB_ITAK (Project 111Y209) and Cerkezk_oy Organized Industrial Zone Management.
dc.identifier.doi10.1080/07373937.2021.1920973
dc.identifier.issn0737-3937
dc.identifier.issn1532-2300
dc.identifier.scopus2-s2.0-85105954334
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1080/07373937.2021.1920973
dc.identifier.urihttps://hdl.handle.net/20.500.11776/6386
dc.identifier.wosWOS:000648171000001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorTunçal, Tolga
dc.language.isoen
dc.publisherTaylor & Francis Inc
dc.relation.ispartofDrying Technology
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectSludge disintegration
dc.subjectconditioning
dc.subjectdewatering
dc.subjectphotocatalysis
dc.subjectstabilization
dc.subjectPCBs
dc.subjectSewage-Sludge
dc.subjectTemperature
dc.subjectImpact
dc.subjectFate
dc.titleEnhancing sludge conditioning and dewatering characteristics by active surfaces modified with fast recombining immobilized nanoparticles
dc.typeArticle

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