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Immediate one-step lime precipitation and atmospheric carbonation as pretreatment for low biodegradable and high nitrogen wastewaters: A case study of explosives industry

2020-06Journal article Open access
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dc.contributor.authorMadeira, Luis
dc.contributor.authorAlmeida, Adelaide
dc.contributor.authorRibau Teixeira, Margarida
dc.contributor.authorPrazeres, Ana
dc.contributor.authorChaves, Humberto
dc.contributor.authorCarvalho, Fatima
dc.contributor.authorMadeira, Luís Miguel Simão
dc.date.accessioned2021-06-24T11:35:31Z
dc.date.available2021-06-24T11:35:31Z
dc.date.issued2020-06
dc.description.abstractThe treatment of some industrial wastewaters is complex, since they usually contain complex non-biodegradable organic compounds or toxic compounds which are not easily treatable. These compounds are not removed by biological treatment in wastewater treatment plants and they may affect the removal of ammonium, nitrate, organic nitrogen by these treatment systems. Therefore, this research proposes a new and innovative low-cost and easy-to-apply pre-treatment to treat low biodegradable and high nitrogen wastewaters, using explosive wastewaters as case study. The pre-treatment is composed by immediate one-step lime precipitation (IOSLM) and atmospheric CO2 carbonation (AC) processes. The novelty of the proposed pre-treatment is based firstly on the use of one reactant (hydrated lime) at high concentrations, added in one step, that produces immediately an abundant and insoluble precipitate able to sweep the organic matter and other contaminants from wastewater in a short time and ensure conditions (pH and Ca2+) for the AC process. Secondly, the AC process uses the sludge produced in IOSLM to keep pH high for longer, allowing ammonia removal while simultaneously the pH is reduced by spontaneous reactions with atmospheric CO2. IOSLM results showed 92.1 %, 98.2 % and 100 % of organic matter, oils and fats, and organic nitrogen removals, respectively, for the optimal hydrated lime dose (7.76 g L-1). In AC process 61 % of ammonium nitrogen was removed and pH reduced to 8.1 in 10 days.
dc.description.sponsorshipLaboratory of Water Quality Control (IPBeja - Portugal)
dc.description.sponsorshipFCT - Fundacao para a Ciencia e a TecnologiaPortuguese Foundation for Science and Technology [SFRH/BD/137209/2018]
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1016/j.jece.2020.103808
dc.identifier.urihttp://hdl.handle.net/10400.1/16465
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationVALORTECWATER - Valorization of slaughterhouse wastewater for the plant production using different eco-innovative technologies.
dc.subjectImmediate one-step lime precipitation
dc.subjectAtmospheric CO2 carbonation
dc.subjectSludge
dc.subjectLow biodegradable organic matter
dc.subjectAmmonia
dc.subjectExplosives wastewater
dc.subject.otherEngineering
dc.titleImmediate one-step lime precipitation and atmospheric carbonation as pretreatment for low biodegradable and high nitrogen wastewaters: A case study of explosives industry
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleVALORTECWATER - Valorization of slaughterhouse wastewater for the plant production using different eco-innovative technologies.
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/OE/SFRH%2FBD%2F137209%2F2018/PT
oaire.citation.issue3
oaire.citation.startPage103808
oaire.citation.titleJournal of Environmental Chemical Engineering
oaire.citation.volume8
oaire.fundingStreamOE
person.familyNameRibau Teixeira
person.familyNameMadeira
person.givenNameMargarida
person.givenNameLuís Miguel Simão
person.identifier.ciencia-id9111-87FB-26AA
person.identifier.ciencia-idA214-0A87-64EC
person.identifier.orcid0000-0002-2153-3282
person.identifier.orcid0000-0001-7674-8881
person.identifier.ridB-9012-2012
person.identifier.scopus-author-id8988625600
person.identifier.scopus-author-id55760206500
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccess
rcaap.typearticle
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relation.isAuthorOfPublication8cd36da9-81c2-4d06-ba84-bdcc2a5a6925
relation.isAuthorOfPublication.latestForDiscoveryadfcbe65-54a7-4cce-b874-bb8e2bdc6167
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