The subject? Diatomaceous earth (DE) spent cake from the filtration process. What happens to it? Is it an issue? Is it recyclable? One of the few “myths” that you may hear about DE is that the spent cake produced in the filtration process is a problem. That it’s not recyclable. That you have to haul it away and that it all goes into a landfill. True or false?
Until fairly recently, this might have been true. But not anymore. In the past few years, great progress has been made to take the DE spent cake and recycle it, for a variety of different uses.
One of the most recent examples of this is at Sonoma Compost, a certified organic compost facility in Petaluma, CA (www.sonomacompost.com). Sonoma Compost runs the Organic Recycling Program on behalf of the Sonoma County Waste Management Agency. Since 1993, Sonoma Compost has successfully diverted approximately 1,460,000 tons of yard trimmings and wood waste from landfills. Sonoma Compost turns those materials into organic compost and mulch, recycled lumber and biofuel, all which they sell at very affordable prices for agriculture, landscaping and gardening. Sonoma Compost also runs a school garden program and consults on municipal composting. One of the materials that Sonoma Compost is successfully recycling into organic compost is diatomaceous earth spent cake. Watch the video featuring EP Minerals Director of Commercial Sustainability, Andrew Welford: https://www.youtube.com/watch?v=9kXQn8X3www
You can also read about another example of recycling DE spent cake into fertilizer in Iowa: http://blog.epminerals.com/recycling-diatomaceous-earth-spent-cake-from-filtration-into-a-fertilizer
Another successful recycling effort involves taking DE from the wine making process and composting it in the vineyard. Read more: http://blog.epminerals.com/composting-in-the-vineyard-using-diatomaceous-earth-spent-cake
At the moment, we’re running several DE spent cake recycling programs for customers, from a variety of different industries. If you’re interested in recycling your DE spent cake, please contact your salesperson.