Integration of biogas plants in the building materials industry |
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| Affiliation: | 1. LASEFI/DEA/FEA (School of Food Engineering)/UNICAMP (University of Campinas), Cidade Universitária “Zeferino Vaz”, Rua Monteiro Lobato, 80, 13083-862, Campinas, Brazil;2. High Pressure Process Group, Department of Chemical Engineering and Environmental Technology, University of Valladolid, Doctor Mergelina s/n, 47011 Valladolid, Spain;1. LBE, INRA, 102, Avenue des Etangs, Narbonne, 11100, France;2. 6T-MIC Ingénieries, ZI de VIC les Graves, 9, Rue du Development, 31 320, Castanet Tolosan, France;3. IMDEA Water Institute, Technological Park of the University of Alcalá, Alcalá de Henares, Spain;1. School of Life Sci. Technol., Beijing Univ. Chem. Technol., Beijing, China;2. USDA Forest Service, Forest Products Laboratory, Madison, WI, USA;3. Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing, China;4. USDA Forest Service, Northern Research Station, Rhinelander, WI, USA;1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;2. Beijing United Gas Engineering & Technology Co., Ltd, Beijing 100052, China;3. Bureau of Science &Technology for Development, Chinese Academy of Sciences, Beijing 100190, China;1. Department of Energy, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129, Torino, Italy;2. ENEA R.C. Casaccia, Via Anguillarese 301, 00123, Rome, Italy;3. Department of Mechanical Enginnering, DICIS, University of Guanajuato, 36885, Salamanca, Mexico |
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| Abstract: | The paper quantifies the synergy-effects of an areal combination of biogas-plants with plants of the building materials industry (e.g. cement works) from the energetic and economical point of view. Therefore an overall process model based on energy and mass flow balances is developed to determine the effects of a combination of both plants in terms of energetic efficiency, investment and operating costs, greenhouse gas emission reduction and overall energy production costs. The results and the calculation procedure for a combination of biogas plants with cement works are presented in detail. The main benefits of this combination are the utilisation of low temperature excess heat sources from cement works for fermenter heating and the direct thermal utilisation of unprocessed biogas as a valuable, CO2-neutral fuel for combustion processes for instance clinker burning. Due to the combination, the energetic efficiency of the biogas plant, defined as utilisable energy output in relation to the energy content of the produced biogas, significantly increases from 63.0% to 83.8%. Concurrently the energy production costs are reduced, turning biogas into a competitive source of energy without the need for federal sponsorship. Calculations show, that production costs in combined plants for plant sizes larger than 90 m³STP/h biogas are even lower than the actual market prize of natural gas. |
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