Coffee Roasting by-products used for County Composting Exhibition


Coffee grounds and chaff are great for Composting 

Coffee roasting and brewing produce two, generally disposed of, items that are extremely useful for gardening.  Chaff and Grounds.  Coffee chaff is the light fluffy flakes that fly off of the beans when they are in the roaster and get collected in the roasting machine.  (See image below)  Coffee grounds are made in the brewing process and are what most people encounter on a daily basis when making their morning cup.  Here at CBRC, we produce an abundance of both.  Coffee grounds provide a wonderful source of nitrogen and the chaff provides carbon.

Coffee chaff after roasting.
Its light, fluffy, and smells a bit like toast.

The Chesapeake Bay Roasting Company partners with the Anne Arundel Master Gardner program to encourage the dissemination of knowledge around the benefits of composting and, specifically the role that coffee grounds can play.

 DSC_0942Brad, our apprentice roaster loading up the Master Gardener pickup  DSC_0944Pam, from the Anne Arundel County Master Gardner Program


Images from Quite Water’s Park

Spencer mixing chaff at QW park    2015-03-19 14.13.45




 MGAnneArundel_150-178x106  The Master Gardners program is operated in conjunction with the University of Maryland.  The program works with volunteers “who are trained to educate citizens about effective and sustainable horticultural practices.Master Gardeners offer landscaping problem-solving through demonstration projects, partnerships with other organizations, and public outreach activities.”  Demonstrations on composting are given twice a month in 2015, starting on April 19 (Earth Day) and continuing through Nov. 7.   Attendees will see the CBRC coffee grounds in action and receive a free compost bin from the Master Gardner program.


Here are some quick helpful hints for coffee grounds and composting from the Anne Arundel Master Gardners

  1. Pick a location for your bin. Partial shade is best.
  2. Set up the compost bin. Optimal size is 27 cubic ft.
  3. Add materials to the bin.
  4. Turn the materials to incorporate oxygen.
  5. Check the moisture of the pile. Add water to make it slightly moist.


Useful links on composting:


From Wiki How: 3 things that you can do with coffee grounds


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