The Cremation Process

The Crematorium is licensed to operate by the London Borough of Hounslow, under the Pollution Prevention and Control Act 1999 (as from 06.04.2008: Environmental Permitting Regulations 2007). Through this act the Department for Environment Food and Rural Affairs (DEFRA) requires local authorities to monitor potential pollution issues, including the cremation process.

During the cremation, the emissions are raised to 850ยบ centigrade to nullify dioxins, furans and particulate matter to make the emissions more environmentally friendly, before being released via the flue into the atmosphere.

During 2010 three new J.G. Shelton diamond cremators, together with an foetal/baby cremator, were installed at the crematorium. The new cremators can accommodate coffins up to 87″ long, 41″ wide and 26″ inches in depth. The foetal/baby cremator can take coffins/crib up to a maximum of 21″ long and 11″ wide. The use of the baby cremator guarantees that some ashes will be available after completion of the cremation process.

The current suggested requirement from DEFRA is that 50% abatement of mercury be achieved. The Board of South West Middlesex Crematorium decided to take the decision to make a large capital investment and has installed new equipment which delivers 100% abatement.

The abatement equipment consists of waste heat boilers, cyclone removal of hot particulates, adsorbent introduction to remove risk of acid gases and activated charcoal filtration to remove mercury and, potentially, other materials.

Waste heat is a resultant product of cooling the gases to enable filtration to be safely used. The waste heat by-product will either reject to atmosphere via blast coolers or in the autumn, winter and springtime, there are plans to re-use the heat from the crematorium buildings, to heat the greenhouse, staff facilities and also hot water.