The link is to "The Humanure Handbook" the absolute most comprehensive guide to all things composting toilets. Joseph Jenkins has developed a system of composting urine and feces to be safe for vegetable gardens. He's proven this by living the process for over 30 years.
I built a simple toilet using a 5 gallon bucket and it's still in use at the farm along with several others. This is a clean, no odor, very safe method of handling a necessary part of life. Just think for a minute what your house would be like after a few days of no water. One of these and some sawdust, or any vegetation works in a pinch, and your sanitary needs are solved.