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Anaerobic baffled reactor coupled with chemical precipitation for treatment and toxicity reduction of industrial wastewater
Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
Rio de Janeiro State University, Brazil.ORCID-id: 0000-0002-7920-8001
Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).ORCID-id: 0000-0002-1903-760X
2014 (Engelska)Ingår i: Environmental technology, ISSN 0959-3330, E-ISSN 1479-487X, Vol. 35, nr 2, s. 154-162Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

This study describes the reduction of soluble chemical oxygen demand (CODs) and the removal of dissolved organic carbon (DOC), formaldehyde (FA) and nitrogen from highly polluted wastewater generated during cleaning procedures in wood floor manufacturing using a laboratory-scale biological anaerobic baffled reactor followed by chemical precipitation using MgCl2·6H2O+Na2HPO4. By increasing the hydraulic retention time from 2.5 to 3.7 and 5 days, the reduction rates of FA, DOC and CODs of nearly 100%, 90% and 83%, respectively, were achieved. When the Mg:N:P molar ratio in the chemical treatment was changed from 1:1:1 to 1.3:1:1.3 at pH 8, the NH4+ removal rate increased from 80% to 98%. Biologically and chemically treated wastewater had no toxic effects on Vibrio fischeri and Artemia salina whereas chemically treated wastewater inhibited germination of Lactuca sativa owing to a high salt content. Regardless of the high conductivity of the treated wastewater, combined biological and chemical treatment was found to be effective for the removal of the organic load and nitrogen, and to be simple to operate and to maintain. A combined process such as that investigated could be useful for on-site treatment of low volumes of highly polluted wastewater generated by the wood floor and wood furniture industries, for which there is no suitable on-site treatment option available today.

Ort, förlag, år, upplaga, sidor
2014. Vol. 35, nr 2, s. 154-162
Nyckelord [en]
anaerobic baffled reactor, magnesium ammonium phosphate, toxicity assessment, ammonia removal, urea-formaldehyde wastewater
Nationell ämneskategori
Teknik och teknologier
Forskningsämne
Miljövetenskap, Miljöteknik
Identifikatorer
URN: urn:nbn:se:lnu:diva-31133DOI: 10.1080/09593330.2013.821142ISI: 000328469200004Scopus ID: 2-s2.0-84897571734OAI: oai:DiVA.org:lnu-31133DiVA, id: diva2:677616
Forskningsfinansiär
KK-stiftelsenTillgänglig från: 2013-12-10 Skapad: 2013-12-10 Senast uppdaterad: 2017-12-06Bibliografiskt granskad

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Laohaprapanon, SawanyaMarques, MarciaHogland, William

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