We use a bucket toilet. You really need to follow the directions in the Humanure book to do it safely. You need to monitor the temperatures to make sure that the pile is heating up adequately. When building your outdoor compost heap, you first start with a "sponge"....The author uses a very thick layer of straw. Then each time you dump the contents of the toilet onto your outdoor heap, you cover it with straw, not more sawdust. The purpose of using a material like straw is that it traps air in the pile to ensure that it stays oxygenated and heats up well. You also need to make sure that it stays moist but not soggy. It's not hard, but there are a few basic things you should know. Read the book if you plan to do this. Some of it has a philosophical tone and most of it is crudely humorous, but I like it because of the valuable information about how to do this responsibly. You can read the book online for free, but it's worth it to own it. I read it online, but I still bought the book. I think I've absorbed more of the vital information having the book in hand. We use peat moss, and it works to keep the smell down just fine. I would like sawdust better, because I would like the look of a bucket of sawdust better than peat moss.....and because it doesn't have so much dust. Anyway, we have to empty the bucket about once every 3-4 days for the four of us. I think it fills up quicker with peat than it would with sawdust, but I don't know for sure. We use about one $7 bag of peat moss per month. It's easy to clean....just takes a few minutes. You can visit the forum at the Humanure website for more information.