Holcim is Pursuing CO₂ Reduction

Holcim ACC in India has a project to grow algae using cement plant CO₂ and then use the algae as fuel. The project involves the screening of appropriate high and fast yielding algae cultures, the development of a bioreactor on a lab bench scale, scaling up the technology to a pilot plant and then demonstrating the same commercially. This requires a multi-disciplinary approach and involves microbiologists, algae experts, bio-technologists, engineers and other professionals. The company and other implementing agencies will be undertaking trials of different industrial systems to identify the best strains and most appropriate culture methods for incorporation into the cement production process for the continuous harvesting of CO₂ and recycling of it into a biomass fuel which will either be reused in the cement plant or marketed to third parties.
ACC has plans to re-engineer the algal bioreactor trials to sequester CO₂ and produce continually harvested algal biomass, and convert the best of the lot into a plant scale bioreactor, which would produce algae at the rate corresponding to CO₂ generation from a cement plant. This would make the process cyclical in nature. For this research, ACC is in discussion with The Indian Institute of Agricultural Research (IARI), The Indian Institute of Technology, and Delhi and National Council for Cement and Building Materials India (NCBM).

http://www.holcim.com/CORP/EN/id/1610640157/mod/7_4_1_3/page/case_study.html

Holcim Romania will cut CO₂ emissions by 1.5 million tons by 2014 by substituting some flyash for cement.

http://www.holcim.com/CORP/EN/id/1610640161/mod/7_6/page/case_study.html

Florida

http://dep.state.fl.us/air/emission/construction/cement/DEPComments0609.pdf