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ePaper created 2013-09-24, 11:56:35 | version 1.25.20
115 Dr.-Ing. Tosca Zech Phone +49 711 970-4115 tosca.zech@igb.fraunhofer.de Dr.-Ing. Ursula Schließmann Phone +49 711 970-4222 ursula.schliessmann@igb.fraunhofer.de References [1] DWA (Hrsg.) (2012) DWA-M 773 Abwasser aus der Weinberei- tung, Hennef, July 2012 Project partner Verbandsgemeindewerke (VGW) Edenkoben, Edenkoben Improved energetic efficiency of the municipal wastewater treatment plant Decentralized anaerobic pre-treatment of wastewater from vini- fication has beneficial effects on the mode of operation of the central municipal wastewater treatment plant. Because carbon compounds are already degraded beforehand peak loads on the central municipal wastewater treatment plant are reduced and nutrient proportion is better balanced. Thus the waste- water treatment plant is loaded more evenly and consumes less energy in total as well as per person equivalent. Because wastewater treatment plants usually require the highest energy consumption of a municipality, the potential for savings is also very high. Furthermore, danger of sludge foaming and bulking and, thus, deleterious effects in the clarification tank is reduced as well as the required volume of the aeration tank. Likewise surplus sludge production is reduced and, thus disposal costs. Measures put in place directly at the wastewater treatment plant are the construction of a buffer tank in the inflow and primary sedimentation as well as the conversion of the simul- taneous and external aerobic sludge stabilization to anaerobic sludge stabilization. The planning of a high load digester was realized within the presented project for sludge production in wastewater treatment plant at times of basic loads. Additional sludge production during harvesting grapes and wine produc- tion at peak season is buffered in high-load digestion and the existing external aerobic sludge stabilization. Outlook Gradual implementation of the concept for treating wastewa- ter from vinification demonstrated in the collective municipal- ity Edenkoben is intended. First measures to improve ener- getic efficiency of the central wastewater treatment plant of Edenkoben have already been taken by the VGW Edenkoben factories themselves. Engineering of the high-load digestion was finished in 2012. The construction of the high-load diges- tion stage at the wastewater treatment plant of Edenkoben is planned for 2013. Scientific supervision and monitoring are managed by the Fraunhofer IGB. 1 Wineries produce large quantities of wastewater after harvesting in autumn. 2 Scheme of the concept for the decentralized anaerobic treatment of wastewater from vinification. 3 Example of decentral anaerobic reactors in technical application. 4 Methane bacteria fluoresce in UV light and appear shining blue in the microscope. Drinking water Wastewater COD > 6000 mg/L COD > 600 mg/L to sewage plant Wastewater Fuel oil Heat Pomace for agricultural nutrient recycling (if applicable) electricity Sludge for agricultural nutrient recycling Winery decentral anaerobic wastewater treatment (WWT) Solid separation Economic use of cleaning chemicals Buffer volume 43 Contacts