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Feb. 4, 2004
Reducing Grease in a Grease Trap
Which Enzyme Works Best to Reduce Grease in a Grease Trap: Liquid or Solid?
David Edwards V, 15, Tucson, Ariz.
Tyler Kirkland, 14, Tucson, Ariz.
Finalists, Discovery Channel Young Scientist Challenge, 2003
Project background: Tyler's father is a wastewater quality supervisor. He explained to the boys the problems he faces as a result of clogs in the sewer system because of inadequate grease trap maintenance by restaurants. He explained that both liquid and solid enzymes are commonly used to reduce grease in grease traps. Tyler and David wondered which form worked better.
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| V. Miller |
Tactics and results: Two restaurants gave the boys access to their grease traps. Tyler and David began by testing samples from each of the traps to ascertain how much oxygen was required to change the chemicals in the grease trap into water and how much liquid could pass through the traps. Then, solid enzymes were added to both traps. Three weeks later the traps were pumped and cleaned and a liquid enzyme was dropped in slowly. To their surprise, the solid enzyme worked best.
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