COGENERATION AT ALCOHOL PRODUCTION PLANTS IN BRAZIL

Two cogeneration systems for use at alcohol production plants in Brazil are suggested and analysed. These can be implemented with currently available technology and, in economic terms, are relatively inexpensive to install. Each system is analysed based on available knowledge relating to the efficiency of alcohol production and the specific energy contents of the waste fibres and waste distillation products. Significant advantages ensue from the incorporation of cogeneration which, in terms of overall efficiency, can amount to as much as 15%. Which system is implemented in any given region in Brazil depends on the relative importance of whether additional electricity generation (from cogeneration) is a main requirement of the region or whether some contribution (from biogas) for fuel usage in road transport engines is desirable.