Eco-toilets are more environmentally sound than conventional flush toilets. In addition to conserving drinking water, eco-toilets also divert and recover the majority of nutrients in human waste. These natural byproducts can be recycled into compost and fertilizer to grow plants.
A number of eco-toilet systems are already permitted for use in homes, business and schools in the Commonwealth of Massachusetts; others are being assessed by the state for future use.
Each type of eco-toilet has different features, advantages and limitations. Eco-toilets can easily be installed in new construction, and can usually be retrofitted to an existing home.
In the fall of 2012, The Green Center opened the Cape Cod Eco-Toilet Center in the hopes of introducing more people to “sustainable sanitation” technologies. The CCETC is now closed to visitors, but please visit us online!
The Green Center 
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I use a modified Sun Mar that I put a Separett urine separator and seat assembly onto. It works fairly well though I had to cut off the top of the urine bottle neck and now when I dump it into my urine processing tank some of it spills outside of the funnel onto the tank. I need to either make or find a better urine bottle. But I really like the design of the Sun Mar 2 gallon bottle.
When using it I sprinkle plenty of sawdust on the feces first then press down a sheet of newspaper on top of the feces , this desiccates the feces and reduces the odor to zero. Never mix urine and feces in a sawdust toilet despite what the “experts” tell you.. I burn the sawdust / feces in my rocket stove and then plan to mix the ash with the aged urine (which becomes hydrous NH3 after 2-3 weeks). This should be an excellent organic NPK fertilizer solution if I do it correctly. I like to use newsprint with no chlorine bleach in it though to prevent dioxins in the ash.
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