Wednesday, August 27, 2008

Dry Washing

AAARRRGGGH!  I've had it with water washing my biodiesel!  Takes way to  much time and water to get a batch done.  In replacement I've ordered some Purolite PD206 from the folks over at Houston Biodiesel to dry wash my biodiesel.  Houston Biodiesel offers plans, parts, and the Purolite for the building for the dry washing towers with standard PVC parts for a very reasonable price.

In simple terms, you take your biodiesel that has been separated from the glycerol by product and run it through the Purolite PD206, at a certain flow rate, and clear filtered biodiesel comes out ready to be put in your tank!  In theory from process time to fill up time could be achieved in less than 5 hours, depending on the amount of biodiesel needing to be filtered.  Once the Purolite PD206 is exhausted you just back flush with methanol to remove contaminants, dry and reuse!  One pound of the Purolite PD206 can in theory process up to 100 gallons before needing to back flushed, I'll report back on that.

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