Ask the Cremation Doctor


The “Greening” of Cremation, Part II
August 11, 2010, 2:01 pm
Filed under: Green Cremation, Technical Issues

To continue the post from August 10th, we were examining how most modern cremation equipment is generally earth-friendly. If you are in possession of old equipment, especially the inline models devoid of a secondary chamber, little can be done to make it run as efficiently as the newer retort-style models with the hot hearth and high retention time. While it is best to upgrade to a newer system, there are a couple other tweaks that one can make. Whether your equipment is old or new, make sure you have adequate temperature controls.

Temperature Control
Adequate and steady control of the secondary chamber temperature of the secondary chamber is critical for the proper operation of cremation equipment. Too low and there will be unwanted emissions from the exhaust stack, too high and these unwanted emissions increase even more. So what is “just right”?

Extensive environmental testing conducted jointly by the USEPA and CANA, the Cremation Association of North America, proved to be invaluable in solving this debate amongst environmental professionals. The graph shown depicts results from over 1300 pages of a USEPA report on crematory environmental operations, shows clearly that 1400˚F (670˚C) is the ideal temperature. Emissions from cremation increased significantly when the secondary chamber temperature was increased from 1400˚F to 1600˚F (870˚C) and then increased again from 1600˚F to 1800˚F.

Temperature control systems, standard on most new cremation systems, can be added or adapted to older and existing cremation equipment for reasonable cost which will eventually pay for it in fuel savings.

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