In early 2009, Greensgrow Farms expanded our sustainability features with the addition of a solar composting toilet. Previously, the farm lacked basic toilet facilities for staff and customers. Used for centuries throughout the world, composting toilets are simple and effective devices for dealing with human waste in a way that saves water, reduces waste and provide a useful finished product.
The Greensgrow design is based off a model developed by Larry Warnberg and further improved by the Dunton Family Farm in Oregon that uses a small passive solar greenhouse to accelerate the process of breaking down the waste into a finished sanitary product free of pathogens and bacteria. Each tub, or batch, will take about 3 months to decompose, at which point the finished compost can be used as fertilizer for our flower beds. We cure our compost for an additional 9 months to ensure complete digestion.
When properly used, composting toilets are odor and insect-free, and are a fantastic and more sustainable alternative to conventional plumbing. The end product is a homogenous and pathogen-free dry compost that does not in any way resemble the beginning product.