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Pello D.,State Oil Company Suriname N.V. STAATSOLIE | Sabadi R.,Cuban Research Institute on Sugar Cane Derivatives ICIDCA | Garrido N.,Cuban Research Institute on Sugar Cane Derivatives ICIDCA
International Sugar Journal

For blending use in gasoline, it has been decided to develop a greenfield project for production of ethanol in Suriname. In this framework, an industrial solutions study was conducted for the definition of the plant location and configuration and the selection of the most appropriate technologies and logistics. Different alternatives for feedstock were studied, from which sugarcane was selected as the most suitable. Based on the expected gasoline demand in Suriname and the cane development program, a decision was made regarding the capacity of the ethanol distillery. Technologies in each process stage have been initially proposed based on process efficiency and site energy integration, also considering the production of raw sugar for domestic demand. Part of the molasses will be sent to a local rum factory. Cogeneration was an important aspect of the study because of the use of bagasse and trash for power generation for process and plantation demand as well as for exporting to the national grid. Vinasse from ethanol production will be concentrated and sent to the plantation as fertiliser. Domestic transportation of final products will be done by road; river and sea transport will be considered in the future. This paper shows the alternatives studied and the result for the best selection. The analysis is firstly based on the mass and energy balances, then an economic evaluation is conducted. Lessons learned from the project management's point of view were also important. Source

Sabadi R.,Cuban Research Institute on Sugar Cane Derivatives ICIDCA | De Armas C.,Cuban Research Institute on Sugar Cane Derivatives ICIDCA | Hurtado R.,Cuban Research Institute on Sugar Cane Derivatives ICIDCA | Ribas M.,Cuban Research Institute on Sugar Cane Derivatives ICIDCA | Rostgaard L.,Cuban Research Institute on Sugar Cane Derivatives ICIDCA
International Sugar Journal

In the boiling house of sugar factories, the process manager may conduct the process through different ways due to the batch mode of operation of vacuum pans, the need for cutting over materials among pans to achieve the required crystal sizes, and the different types of materials that must be handled, some of which are recycled. The process manager addresses most of his efforts to this area since he must try to reach the required standards of quality in end-products and the expected yields, but meanwhile he must also keep a stable steam demand and accumulation of intermediate materials in adequate quantities to maintain a steady operation. A new approach for synthesis and management (material and energy balances, scheduling) of the processes on the pan stage for sugar production from cane is presented and its advantages demonstrated in this paper. Detailed models and approaches for process synthesis and operations management on the pan stage of sugar factories are described. These models are the basis of the software tool PLANAZUCAR® dedicated to the scheduling of complex production systems in the sugar industry. Approaches include the use of HAZOP techniques and other software tools. Through actual case studies, the feasibility of using the software tool PLANAZUCAR for scheduling analysis in the sugar industry was demonstrated. Use of the software has allowed a thorough study of the utilisation rates of the equipment in a factory as well as an analysis of the influence of the production planning on the steam consumption profile, looking for stability in demand. Source

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