Reducing water consumption in beet distilleries by recycling the condensates to the fermentation phase |
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| Institution: | 1. Department of Chemical Engineering and Food Technology, Faculty of Sciences, University of Cádiz, Campus Río San Pedro, PB 40, 11510 Puerto Real, Spain;2. Department of Chemical Physics, Faculty of Sciences, University of Cádiz, Campus Río San Pedro, PB 40, 11510 Puerto Real, Spain;3. Department of Physics of Condensed Matter, Faculty of Sciences, University of Cádiz, Campus Río San Pedro, PB 40, 11510 Puerto Real, Spain;4. Department of Molecular Biology and Biochemical Engineering, University of Pablo de Olavide Building 22, 3rd floor, Road to Utrera, km 1, 41013 Sevilla, Spain;1. Department of Chemical Engineering, Engineering School, University of São Paulo (USP), Caixa Postal 61548, 05424-970 São Paulo, SP, Brazil;2. Department of Food Engineering (DEA), School of Food Engineering (FEA), University of Campinas (UNICAMP), Campinas, SP, Brazil;1. Key Laboratory of Radiation Physics and Technology of Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, China;2. Key Subject Laboratory of National Defense for Radioactive Waste and Environmental Security, Southwest University of Science and Technology, Mianyang, China;3. School of Physics and Materials Engineering, Dalian Nationalities University, Dalian, China;1. Food Biotechnology Group, Department of Chemistry, University of Patras, Patras 26500, Greece;2. Department of Food Science and Technology, Faculty of Agricultural Development, Democritus University of Thrace, Orestiada 68200, Greece;1. AgroParisTech, UMR 1145 GENIAL, F-91300 Massy, France;2. INRA, UMR 1145 GENIAL, F-91300 Massy, France;3. Cnam, UMR 1145 GENIAL, F-91300 Massy, France;4. INRA, UMR 1010, F-31030 Toulouse Cedex 4, France;5. Université de Toulouse, INPT-ENSIACET, Laboratoire de Chimie Agro-industrielle, F-31030 Toulouse, France;6. Université de Toulouse INPT-UPS, Laboratoire de Génie Chimique, F-31030 Toulouse Cedex 4, France;7. CNRS, Laboratoire de Génie Chimique, F-31062 Toulouse, France;8. ProSim SA, Immeuble Stratège A, 51, rue Ampère, F-31670 Labège, France |
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| Abstract: | Recycling the stillage condensates produced in beet distilleries into the fermentation phase, would enable both water consumption and wastewater rejection to be reduced. However, it has been demonstrated that at least eight compounds in these condensates caused the inhibition of alcohol production. Their retention by a reverse osmosis (RO) process and preparative chromatography was thus considered. The reverse osmosis treatment led to high rejection coefficients for all neutral compounds whatever the pH, but had to be carried out at basic pH to obtain an almost complete retention of the small acids. Adsorption isotherm measurements carried out on various chromatographic supports showed that acidic compounds were best retained on a weak anionic exchanger and other solutes on a non-polar adsorbent. The coupling of the RO process and chromatography could therefore be a viable alternative for the treatment of these effluents. |
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