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2 years, 3 months ago via Twitter

what do restaurants do with used cooking oil?

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kiwichic | 2 years, 3 months ago view on twitter
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Restaurants are legally required to dispose of used cooking oil responsibly. Historically restaurants have paid to have their used grease hauled away but this is changing. Sales of conversion kits to enable diesel powered vehicles run on used restaurant oil are booming and the demand for the grease is high. So high in fact that theft of grease is now a problem.
So in answer to your question they either:
Pay to have it hauled away though some hauling companies now offer free pickup and on sell the grease to refineries which turn it into bio-fuel.
Sell the grease or give it away to local recyclers.
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baka13 | 2 years, 3 months ago view on twitter
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Well, I cannot answer for every restaurant in the world, but I can answer for the many restaurants and food-preparation facilities I have worked in over the years. At each of these places, usually out next to the dumpster outside, there were giant metal cans where we would dump the grease when we cleaned out the fryers and changed the oil.

A Grease Service comes by periodically and empties the big cans of used oil when they're full, and takes them away. They sell it to companies that make soap, because grease/oil/lard is a primary ingredient in soap.

So, to be honest, the answer to your question is that the used cooking oil eventually, after the soap-making process, is rubbed all over the skin of people across the world every time they take a shower.
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Experience in the food-service industry

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cmgriffi | 2 years, 3 months ago Report

Thanks for the answer. Do you have any idea about how much these Grease Service companies charge?

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baka13 | 2 years, 3 months ago Report

Well, it really depends on the Firm that's handling the grease pickup. Some companies do it for free. Others actually work out a deal where they PAY the restaurant for the grease. (Remember, they're turning around and making a stellar profit on this stuff when they make it into soap, or supplement livestock feed with it).

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cmgriffi | 2 years, 3 months ago Report

thanks, not what i was hoping, but thanks

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baka13 | 2 years, 3 months ago Report

Well, can you clarify what exactly you meant? I took it as "How much do they charge restaurants to haul away their used grease?", but if you meant "How much do they charge soap manufacturers for the grease?", the answer is that the price of yellow oil, much like the price of crude oil, fluctuates. According to a May, 2008 article in the New York Times, published at http://www.nytimes.com/2008/05/30/us/30grease.html :

"Much to the surprise of Mr. Damianidis and many other people, processed fryer oil, which is called yellow grease, is actually not trash. The grease is traded on the booming commodities market. Its value has increased in recent months to historic highs, driven by the even higher prices of gas and ethanol, making it an ever more popular form of biodiesel to fuel cars and trucks.

In 2000, yellow grease was trading for 7.6 cents per pound. On Thursday, its price was about 33 cents a pound, or almost $2.50 a gallon. (That would make the 2,500-gallon haul in the Burger King case worth more than $6,000.)"

I found an interesting article at http://www.eia.doe.gov/oiaf/analysispaper/biodiesel/ that puts forth a formula for estimating yellow oil prices:

" The USDA does not forecast yellow grease prices, although in the past the prices of yellow grease and soybean oil have moved together. Monthly soybean oil price data are obtained from the USDA, and monthly yellow grease price data are obtained from the Jacobsen Publishing Company. Unweighted averages are used to construct annual prices. The results of a linear regression are:

Yellow grease price = 0.49 x Soybean oil price .

Yellow grease price projections (Table 2) are estimated by using soybean oil price projections in the above equation."

Hope that helped more.

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