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Please use this identifier to cite or link to this item: http://repository.li.mahidol.ac.th/dspace/handle/123456789/11672
Title: Enhanced efficiency of dissolved air flotation for biodiesel wastewater treatment by acidification and coagulation processes
Authors: Cheerawit Rattanapan
Aneak Sawain
Thunwadee Suksaroj
Chaisri Suksaroj
Mahidol University
Prince of Songkla University
Keywords: Chemical Engineering;Chemistry;Engineering;Environmental Science;Materials Science
Issue Date: 3-Oct-2011
Citation: Desalination. Vol.280, No.1-3 (2011), 370-377
Abstract: A novel approach was developed to enhance the efficiency of the dissolved air flotation (DAF) for biodiesel wastewater by acidification and coagulation. Firstly, Grease & Oil and Chemical oxygen demand (COD) removal efficiencies of biodiesel wastewater using acidification with pure hydrochloric acid and pure sulfuric acid at pH = 3 and 1 day retention time were more than 80%, and 50%, respectively. Secondly, Grease & Oil and COD removal efficiencies of biodiesel wastewater using alum, polyaluminum chloride and ferric chloride coagulants without acidification at 1.0 g/L were more than 90% and 30%. Thirdly, DAF alone and DAF with acidification could not separate Grease & Oil from biodiesel wastewater. Thus, DAF with the acidification and coagulation is suggested for biodiesel wastewater treatment. Biodiesel wastewater treatment by acidification before alum coagulation allowed the alum concentration to be reduced by 60-90% compared to treating without acidification. In addition, the efficiency of Grease & Oil removal from biodiesel wastewater by DAF with alum and acidification was 85-95%. It can be concluded that the efficiency of Grease & Oil removal from biodiesel wastewater using DAF with acidification and coagulation was 10% greater compared to other processes. © 2011 Elsevier B.V.
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=80053324120&origin=inward
http://repository.li.mahidol.ac.th/dspace/handle/123456789/11672
ISSN: 00119164
Appears in Collections:Scopus 2011-2015

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