It is best to allow the solids to decompose before emptying your toilet. The longer you wait before emptying your toilet, the nicer the job will be. You will find that even in as little as one week much of the solid wastes have begun to decompose, and just the paper products are visible.
Do not leave the liquid wastes in the tank for extended periods – this should be emptied every 2-5 days. While everyone is different, some urine will smell bad if allowed to sit for extended periods.
From our own experience, we know that a few minutes after the last use, no unpleasant, fecal smell is perceptible. Furthermore, there is no “container full” indicator as with a standard camping toilet. So, you can be much more flexible with a composting / separating toilet, as far as disposal is concerned. Many boat or RV owners, for example, leave the solid wastes in the toilet over the winter and empty it in the spring.