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Biotreatability of wastewater generated during machinery washing in a wood-based industry: COD, formaldehyde and nitrogen removal
Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.ORCID iD: 0000-0002-7920-8001
Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.ORCID iD: 0000-0002-1903-760X
2010 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 101, no 23, 8975-8983 p.Article in journal (Refereed) Published
Abstract [en]

This paper describes biotreatability tests for treating a wastewater stream generated by wood-floorindustries after cleaning and washing of machinery used to apply urea–formaldehyde resins ontowood-fiber boards. A biological system consisting of an anaerobic – intermittently aerated reactor inlab-scale was constructed. Since the investigated wastewater is intermittently generated, the systemwas designed to operate in batch mode. The treatment focused on removal of formaldehyde and COD,as well as the efficiency of nitrification–denitrification. The proposed cheap and relatively simple-tooperatebiological system achieved COD and formaldehyde removal rates of 65 ± 11% and 93 ± 4% respectively.In spite of anaerobic ammonium removal and denitrification, the intermittently-aerated reactorshowed poor performance for nitrification. Therefore, a better understanding of constraints for the processimprovement is necessary. Regardless the constraints faced during the investigation, the proposedsystem can be considered feasible to partially reduce a great amount of biodegradable compounds inurea–formaldehyde-based wastewaters. However, to comply with strict threshold limits for industrialeffluent discharges, the use of biological treatment combined with more advanced processes is neededto achieve a better quality of the final effluent.This paper describes biotreatability tests for treating a wastewater stream generated by wood-floorindustries after cleaning and washing of machinery used to apply urea–formaldehyde resins ontowood-fiber boards. A biological system consisting of an anaerobic – intermittently aerated reactor inlab-scale was constructed. Since the investigated wastewater is intermittently generated, the systemwas designed to operate in batch mode. The treatment focused on removal of formaldehyde and COD,as well as the efficiency of nitrification–denitrification. The proposed cheap and relatively simple-tooperatebiological system achieved COD and formaldehyde removal rates of 65 ± 11% and 93 ± 4% respectively.In spite of anaerobic ammonium removal and denitrification, the intermittently-aerated reactorshowed poor performance for nitrification. Therefore, a better understanding of constraints for the processimprovement is necessary. Regardless the constraints faced during the investigation, the proposedsystem can be considered feasible to partially reduce a great amount of biodegradable compounds inurea–formaldehyde-based wastewaters. However, to comply with strict threshold limits for industrialeffluent discharges, the use of biological treatment combined with more advanced processes is neededto achieve a better quality of the final effluent.

Place, publisher, year, edition, pages
2010. Vol. 101, no 23, 8975-8983 p.
Keyword [en]
Anaerobic process Nitrification Denitrification Intermittent aeration Biological reactor
National Category
Other Environmental Engineering
Research subject
Environmental Science, Environmental technology
Identifiers
URN: urn:nbn:se:lnu:diva-7134DOI: 10.1016/j.biortech.2010.06.122OAI: oai:DiVA.org:lnu-7134DiVA: diva2:343151
Available from: 2010-08-12 Created: 2010-08-12 Last updated: 2016-11-17Bibliographically approved

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Kaczala, FabioMarques, MarciaHogland, William
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CiteExportLink to record
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