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Browsing Conference papers by Subject "Biogas"
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Item Open Access Biogas home-production assessment using a selective sample of organic vegetable waste. A preliminary study(Red de Revistas Científicas de América Latina, el Caribe, España y Portugal Sistema de Información Científica, 2012-02) Durán-García, Martín; Ramírez, Yrina; Bravo, Ricardo; Rojas-Solorzano, L.Biogas generation plants using organic waste are a daily reality that can be observed in different areas of waste disposal that exist in many cities of the world. In fact, the generation of biogas through anaerobic bio-digestion of urban wastes has a high impact in terms of energy use and reduced environmental liabilities. The present study focuses on the assessment of biogas production for domestic consumption; several biodigesters were tested in order to evaluate the biogas production under standard pressure and temperature. The test estimates volume of biogas being produced, substrate pH and substrate concentration, using different types of catalysts. A test bed was designed for testing three digesters (A, B and C) within recycled bottles of polyethylene terephthalate (PET), whose maximum volume is ~0.6 liters. A 60g organic substrate compound was placed in each bottle. The organic compound consisted of peeling residues of potatoes, cabbage and carrots. Experimental characterization of the mixture allowed to observe the production of biogas for domestic use, system temperature, pH levels achieved, mass and substrate concentration, as well as concentration and volume of the catalyst. Further studies, with a larger sample and monitoring the container pressure are recommended in order to establish a more precise relation among the whole set of experimental parameters.Item Open Access Pre-feasibility study of a biogas plant for peyrelevade community(International Renewable Energy Congress November 5-7, 2010 – Sousse, Tunisia, 2010-11-05) Koh, Pei Ling; Pomarico, Victor; Tadepalli, Venkata Phani; Rojas-Solorzano, L.This work presents a technical and financial pre-feasibility assessment for heat generation from biogas for a retirement home in the community of Peyrelevade, France. The heat demand of the retirement home currently relies on fuel oil boiler and electric heaters. The biogas is to be produced mainly from grass silage. As result of the feedstock abundance in the community, electricity can be also generated in an 80kWe CHP unit operating in full power capacity. The electricity produced can be then sold to the national electricity utility in France. The financial analysis was carried out using RETScreenTM. An efficiency of 62.9% is achievable in this CHP (Combined heat and power) biogas plant, with a total life cycle saving/income of 0.05€ for each MJ of heat supplied to the retirement home. A company set-up has also been proposed for the development of a community based company