CleanTech Biofuels is in the business of converting your garbage waste into ethanol. Cellulosic ethanol production is a complicated process, but very interesting. The first step is at your garbage containers; waste is picked up and taken to a sorting facility. Mike Rowe from the Discovery Channel’s ‘Dirty Jobs’ has covered this type of sorting facility. Next, the items are taken to a large special conveyer belt vessel. Inside this vessel, the items are agitated, heated, and steamed along the inside of the vessel so the organic/cellular matter can fall. The larger items go to a recycling center while the biomass stays for the next steps.
The biomass is then processed with a two-step saccherification process, which is a fancy word for converting organic matter into sugar. Nitric acid is added which produces pentose sugars. Ammonia added to freeze the process which yields hextose sugars. Heated once again, Ethanol is produced.
Americans throw away over 250 million tons of garbage every year. Out of all that garbage, approximately 32 percent is recovered and recycled or composted, 14 percent is burned at combustion facilities, and the remaining 54 percent (or 135 million tons of garbage) is disposed of in landfills. Imagine if every city had a reprocessing plant like this instead of trucking their waste into landfills which can, over time, leach chemicals into our groundwater.
CleanTech also announced that they have reached the First Milestone for converting cellulose to ethanol in its exclusive worldwide sublicense agreement for technology developed at the University of California, Berkeley. The first milestone required that CleanTech satisfactorily test the technology purchased from the University of California, Berkeley to generate fermentable sugars from municipal solid waste at efficiencies satisfactory to CleanTech. The milestone has been achieved and all tests have been positive, proving the process a success.
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