Just started using a composting toilet, the Trelino.
Trelino® | Portable Composting Toilet | Made in Germany
A bit on the expensive side but worth it to us. We use coconut coir from Amazon for the drying/absorbing media and it works quite well to absorb the moisture from the poop side. As with any composting toilet, the first step is to separate the poop from the urine and to then dry out the poop to start the composting process. We add some used coffee grounds to the coir to eliminate the odors completely.
There have been some reports that the bags that Trelino supplies (they're compostable) break down too soon for some users. They suggest that the bags will last 2-3 weeks before they start to break down, but it has to do with how much moisture is in the environment. The higher the humidity, the sooner breakdown will begin. To avoid the possiblity of a bag breaking and making a mess, we line the bag first with a heavy duty garbage bag. If there's the slightest bit of doubt that the compostable bag is not holding its strength, then we dump the outer plastic bag and the inner bag into the garbage. But if it's solid, the compostable bag goes into our composter for the final stages of breakdown. To be accurate, it's not a composting toilet. It just starts the process.
As with any of these devices, the urine goes into a separate container from the poop. This is accomplished by a diverter that funnels the urine into the separate container. The top of this container contains a silicone flapper valve that allows the urine to enter the container but then closes to keep the odor from escaping. This container can be emptied into any toilet that you come across in your travels. It can also be diluted and spread on your lawn/garden where it will act as a high nitrogen fertilizer. Spread it before watering and there won't be any odor.
The toilet is very light, our model is the "Evo M," the middle height one, and it's about 10 pounds, loaded with coir and grounds, and ready for use.
