Uganda - Example for reducing CO2 emissions
Thanks to the use of pozzolans and alternative fuels, Hima Cement Ltd. can reduce their CO2 emissions. The program to introduce alternative fuels has the dual benefit of not only reducing CO2 emissions, but also production costs. On average, Hima currently replaces 35% of its fossil fuels with alternative solutions.
The Hima plant uses pozzolans in its cement production. Pozzolans, natural rocks of volcanic origin, make it possible to reduce the quantity of clinker in the cement composition, thereby reducing CO2 emissions generated by the combustion of limestone during clinker production. Today, for a given quantity of cement, the proportion of pozzolans in cement is 35% and that of clinker 60%.
Regarding alternative fuels, a number of programs should contribute to reaching the target for 2006 which is 50% substitution of fossil fuels by alternative fuels. The main project is a $1.2 million investment in a new 2,000 tons capacity alternative fuels storage warehouse, a conveyor belt feeding system and a weigh feeder for coffee husks, scheduled to be completed and commissioned in April 2006. Other projects are underway, such as the diversification of alternative fuel sources - rice husks, sawdust, etc. - and improving price stability through the development of bulk long-term supply contracts.
Alternative fuel substitution for 2004 and 2005 were 5,229 t (23%) and 12,350t (29%) of biomass with CO2 reductions of 7,000 t CO2 and 17,000 t CO2 respectively. For 2006 the objective is to replace half of all fossil fuels used by biomass to reduce CO2 emissions by 41,000 tons.
Hima Cement Ltd.