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Cleaner Sewer:
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Reprinted
from Food Engineering
Oil Recovery
Reduces Sewer Cleaning
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In
addition to the 5H, Oil Skimmers, Inc. produces a larger skimmer
(Model 6V, pictured above) for removal of oils and fats from
in-ground sumps, pits, outdoor ponds and lagoons.
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Doskocil
Food Service Company, a division of Foodbrands America, Hutchinson,
KS, produces two million pounds of pizza toppings a week. After
cooking, the meat toppings are flash frozen in one of two spiral
freezers. Air currents within the freezer carry grease-containing
vapors through the ammonia freezer coils where they adhere and become
lodged.
Doskocil
uses 1,600 gallons of water per hour to defrost the coils. Each
defrost cycle carries about 50 lb. of grease with the water, causing
an overloaded and clogged DAF (Dissolved Air Flotation) system.
This was becoming a real maintenance problem for the company.
Searching for a simple yet cost-effective solution,
the company installed a model 5H oil skimmer from Oil Skimmers,
Inc. Defrost water collects in a discharge reservoir where
oil separates and floats to the top. A specially formulated polyurethane
closed loop collector tube is drawn across the surface of the grease-laden
water. Oil adheres to the outside of the tube; if lifted up and
out of the reservoir, then drawn through scrapers that remove the
oil. Recovered oil collects in an attached container and the cleaned
tube simply and continually repeats the process.
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The
simple closed-loop polyurethane tube removes 800 lb. of grease
per day from two spiral freezers' defrost water, reducing
maintenance costs while generating a saleable byproduct. (Source:
Doskocil Food Service Co.)
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"We
used to have to clean our sewer lines every month," says Bill
Hackett, maintenance engineer. "Now, we only have to do this
every three months. Also there are no shutdowns due to drain backups
and we have increased the quality of our effluent."
Doskocil
has realized an added bonus as well. It generates income by selling
the recovered grease to a byproducts company. According to Hackett,
the skimmer collects about 800 lb. Of grease per day and the sale
of grease to the byproducts company more than paid for the cost
of the unit within the first month of use.
Oil
Skimmers, Inc.
P.O Box 33092
Cleveland, OH 44133
800-200-4603
(440) 237-4600
Fax: (440) 582-2759
E-Mail: sales@oilskim.com
Web: www.oilskim.com
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