What do producers do with glycerin left over from biodiesel production?
I read that the reaction used to create biodiesel creates glycerin as a byproduct. What do producers (brewers and companies) do with their glycerin?
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Filed under: Making Biodiesel
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Corporate biodiesel producers have access to further refining techniques to produce marketable products and may polymerize it, hydro crack or whatever to get high value hydrocarbons again. In a worse case situation, they could gasifier it to syngas and synthesize high value products like gasoline and diesel. Home brewers use what they can to pressure wash their driveways and home exteriors, their neighbors driveways, their decks, and then try to find a micro refinery or waste disposal facility to take the rest. Pouring it down the drain may keep your pipes clean but is probably illegal.
using glycerin on the ground or decks is bad for the environment because the homemade glycerin still has methanol and caustic disolved in it.
The big producers just sell their raw glycerine to others that distill it into two different grades and then sell those to others. Cracking it into other fuels like gasoline IS NOT done because the cost and by products from such an operation would not be economical.
Home brewers typically just throw their toxic waste into the trash. they care more about themselves and not the earth. Bio diesel is an its all about me fuel.
The methanol is distilled to reuse for the next batch. I give most of the glycerin to someone who makes soap. What she doesn’t take is composted. The glycerin can be used as an industrial fuel, too.