Page 54 - CAPE Green Engineering Syllabus 2016.docx_Neat

Figure 4-Biomethanisation Plant
(http://www.cocktailsoldfashioned.de/2011/02/demerara-distillers-limited-guyana-rum/

(accessed Oct 07, 2014)

The carbon dioxide captured is processed to remove any entrained alcohol and other organic
compounds leaving pure carbon dioxide gas. This purified carbon dioxide gas is cooled liquefied and
stored for further use. The major use of the carbon dioxide is in the carbonated beverages
manufactured by DDL, therefore DDL produces carbonated beverages with a green source of carbon
dioxide. Additionally, a small amount of the carbon dioxide gas is used to manufacture the solid carbon
dioxide called dry ice which is used as a cooling agent. Also, many fabrication facilities utilise carbon
dioxide gas as the inert gas in the MIG (metal inert gas) welding process. This gas is also used to refill
carbon dioxide fire extinguishers.

While DDL has moved a long way towards greening its production process it was not without
challenges. Some of the major challenges included the high cost to introduce the new technology and
infrastructure. There was also the lack of in-house skills. This required that the company investing in
training its staff to manage and maintain the equipment and processes. Therefore it can be concluded
that DDL has been addressing potential environmental problems by utilising waste materials to
manufacture world class spirits and beverages, supplying energy and other useful services to the wider
community.

CXC A36/U2/16 50