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Operation of up-flow anaerobic fixed-bed reactor treating effluent from acidogenic reactor fed by brewery wastewater

Grant number: 12/10271-9
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): September 01, 2012
Effective date (End): August 31, 2013
Field of knowledge:Engineering - Sanitary Engineering - Water Supply and Wastewater Treatment
Principal researcher:Moacir Messias de Araujo Junior
Grantee:Bruno Orlando Gaudencio
Home Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Associated research grant:09/15984-0 - Bioenergy production from wastewaters and environmental fitting of liquid and solid wastes generated, AP.TEM

Abstract

Beer is the fifth most consumed beverage in the world, behind the tea, carbonates, milk and coffee (Fillaudeau et al, 2006). According to SINDICERV, 2007 - Sindicato Nacional da Indústria de Cerveja, Brazil is among the four largest brewers in the world with an annual volume of about 10.34 billion liters. According to the CETESB (2005), per 1 liter of beer produced is consumed between 4 and 10 liters of water, giving rise to 3-6 liters of effluent. Treatment of brewery wastewater in anaerobic reactors was effective in the generation of methane gas, however, with the recent global warming caused by increased generation of gases that cause global warming, many studies have focused on the production of hydrogen as an alternative clean energy, since the only product generated in its combustion with oxygen is water. In this context, there's the idea of dividing the anaerobic treatment of wastewater in two stages, which the first stage will consist of acidogenic reactor in order to produce hydrogen, whereas the second stage will consist of methanogenic reactor, which will target the production of methane. The Laboratório de Processos Biológicos of EESC - USP has researched differents acidogenic reactors for hydrogen production, however there is a lack of research in development for the methanogenic reactors treating effluent of these acidogenic reactors, which is of great importance for the sustainability of the anaerobic treatment. So, we propose the parallel study of two up-flow anaerobic fixed-bed reactors. One will work directly with brewery wastewater effluent and the other will work with the effluent of the acidogenic reactor, treating the same brewery wastewater. This way, could be possible to compare the two cases and discussion about the technical and economic feasibility of the separation of the process in two-stage treatment (acidogenic and methanogenic). The reactors will be constructed with acrylic tubes with 80 mm of diameter and 750 mm of height (total volume of 3.75 L). As support material, will use cubic arrays of polyurethane foam enveloped with rigid structure of polypropylene. The experimental phase will be divided into three stages, characterized by operation with different hydraulic retention times, respectively, 12h, 8h and 4h. The wastewater studied will come from the brewing industry, with average values of 7500 mg COD/L, 3200 mg TSS/L, 80 mg NTK/L and 5 mg SO4-2 / L. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
M. M. DE ARAUJO JUNIOR; B. O. GAUDENCIO; D. N. AYABE; M. ZAIAT. EVALUATION OF AN INNOVATIVE ANAEROBIC BIOREACTOR WITH FIXED-STRUCTURED BED (ABFSB) FOR BREWERY WASTEWATER TREATMENT. Brazilian Journal of Chemical Engineering, v. 33, n. 4, p. 733-741, . (12/10717-7, 10/20025-0, 09/15984-0, 12/10271-9)
DE ARAUJO JUNIOR, M. M.; GAUDENCIO, B. O.; AYABE, D. N.; ZAIAT, M.. EVALUATION OF AN INNOVATIVE ANAEROBIC BIOREACTOR WITH FIXED-STRUCTURED BED (ABFSB ) FOR BREWERY WASTEWATER TREATMENT. Brazilian Journal of Chemical Engineering, v. 33, n. 4, p. 733-741, . (12/10271-9, 12/10717-7, 09/15984-0, 10/20025-0)

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