Publication:
Combined and individual applications of ozonation and microwave treatment for waste activated sludge solubilization and nutrient release

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dc.contributor.authorSEMERCİ, NESLİHAN
dc.contributor.authorsCosgun, Sevil; Semerci, Neslihan
dc.date.accessioned2022-03-12T22:29:08Z
dc.date.available2022-03-12T22:29:08Z
dc.date.issued2019
dc.description.abstractThis study focused on the separate and combined applications of ozonation and microwave treatment to enhance the phosphorus and ammonia release from waste activated sludge. Twenty-six batch experiments were run with or without acidic (pH 2) and alkaline (pH 10) pretreatments and different ozone dosages. Also, microwave post treatments were applied to enhance phosphorus release efficiency. Results showed that ozonation is an effective technology for solubilization and release without any pre or post-treatment, reactive phosphorus content increased from 1.9 to 3.6 mg PO4-P/g MLSSin (89.5% increase) with 19.4% COD release. Alkaline pretreatment enhanced sludge solubilization and phosphorus release at most (23.9% COD release and 152.6% PO4-P increase); however, decreases in ammonia, calcium and magnesium concentrations pointed out a loss of a part of released phosphorus, due to struvite or apatite precipitation. Acidic pretreatment reduced the sludge solubilization during ozonation (10% COD release) but prevented the uncontrolled precipitation and enhanced the phosphorus release (115.8% PO4-P increase). For microwave treatment, acid pretreated sludge showed higher release than alkaline pretreated or neutral sludge. Among different process combinations, acid pretreatment/ozonation/microwave experiments have shown the highest sludge solubilization and nutrient release (48% COD release and 579% PO4-P increase); however, the difference between acid pretreatment/microwave and acid pretreatment/ozonation/microwave was not significant in terms of phosphorus release (479% PO4-P increase, p = 0.082). Thus, pH 2/microwave may be a cost-effective and feasible alternative for nutrient recovery from waste sludge. For struvite precipitation, pH 8.5 were determined as optimum level. Also using fine struvite particles as seed increased struvite precipitation efficiency.
dc.identifier.doi10.1016/j.jenvman.2019.04.001
dc.identifier.eissn1095-8630
dc.identifier.issn0301-4797
dc.identifier.pubmed30986664
dc.identifier.urihttps://hdl.handle.net/11424/235355
dc.identifier.wosWOS:000469896300008
dc.language.isoeng
dc.publisherACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
dc.relation.ispartofJOURNAL OF ENVIRONMENTAL MANAGEMENT
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectNutrient recovery
dc.subjectSludge management
dc.subjectSludge reduction
dc.subjectOzonation
dc.subjectMicrowave treatment
dc.subjectADVANCED OXIDATION PROCESS
dc.subjectSEWAGE-SLUDGE
dc.subjectEXCESS SLUDGE
dc.subjectPHOSPHORUS RECOVERY
dc.subjectSTRUVITE CRYSTALLIZATION
dc.subjectANAEROBIC-DIGESTION
dc.subjectPILOT-SCALE
dc.subjectPRETREATMENT
dc.subjectDISINTEGRATION
dc.subjectREDUCTION
dc.titleCombined and individual applications of ozonation and microwave treatment for waste activated sludge solubilization and nutrient release
dc.typearticle
dspace.entity.typePublication
local.avesis.idccb5722a-d39c-4929-a450-cce17890649e
local.import.packageSS17
local.indexed.atWOS
local.indexed.atSCOPUS
local.indexed.atPUBMED
local.journal.numberofpages8
local.journal.quartileQ1
oaire.citation.endPage83
oaire.citation.startPage76
oaire.citation.titleJOURNAL OF ENVIRONMENTAL MANAGEMENT
oaire.citation.volume241
relation.isAuthorOfPublication2b40c564-3821-44aa-b6e7-770e18c2e489
relation.isAuthorOfPublication.latestForDiscovery2b40c564-3821-44aa-b6e7-770e18c2e489

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