Hello, my name is David O'Mic. I am a designer and user of composting toilets. I've been using composting toilets for almost 25 years. This composting toilet is a waterless toilet that utilizes microbes to break down human sewage into a nutritious plant fertilizer known as compost. Okay, so this is the barrel composting toilet system. This particular system involves two barrels, which is the size required for one person in full-time use. To determine sizing, you basically take the number of adults who will be using the toilet full-time, plus one is the number of barrels required in the system. So for two people in full-time use, it takes three barrels. These barrels are 55 gallon plastic grums. They are made of high density polyethylene. They are fully recyclable and widely available. One of the reasons we chose them is sort of the basis of the design for those reasons, and also relatively inexpensive. The toilet consists of the barrel, a wooden top, which is finished with a waterproof finish, toilet seat, a three-part ventilation system. And you'll notice that we have two barrels here. The top is removable. So the barrel is basically used until it's about three-quarters full. Then the top is removed and set over an adjacent barrel, and that barrel is used until it's full. Now the barrel that has the top on it and it is being used on a day-to-day basis is known as the active barrel. So to talk a little more detail about the various components of the toilet, why don't we start with the toilet seat. This is an ordinary round toilet seat. We have added closed cell adhesive foam weather stripping around the lid and around the seat. The function of these is to keep insect vectors that we talked about earlier in the introduction from entering the toilet. Right behind the toilet seat, you'll see three plumbing fittings. These are part of the ventilation system. This vent tube goes to an exterior vent for indoor applications, for exterior applications. This vent is not necessary. You'll notice on the vent that it is covered in a fluid of fly screen. The function of this is also to keep flies from entering the toilet, as well as rodents and other animals. The top is secured to the top of the barrel with locator bolts and also with springs. Once the toilet is mostly full and the top needs to be moved from the active barrel to the adjacent barrel, which now becomes the active barrel, it's just a matter of undoing four springs one at each corner, lifting the barrel up and setting it on the adjacent barrel. Now you'll notice that the adjacent barrel, this is an aging barrel. This one already has been used and it was was about three quarters full. The compost is now going down a bit because that's part of what happens in the composting process. You'll notice that it is covered in insect screen again to keep flies and other insect vectors out of the barrel. The screen is secured to the barrel with a cord and spring assembly that provides an effective seal all around the perimeter so that flies cannot get in to the barrel. You'll also notice that these barrels are buried in the ground. This is an an outdoor application here. For an indoor application, the barrels would just sit right on the floor and there'd be steps going up to the to the barrel. But in outdoor applications, it's really more convenient, often than just the bury the barrels. One thing I'd like to point out is that there are no holes in the bottom of the drilled into the bottom of the barrels. Everything liquid and solid that goes into the toilet stays in the toilet. Again, as I mentioned in the introduction, this is a zero discharge system and that's an important health safety aspect of this design. One other aspect of the design of this toilet that we've been striving for is to come up with a design that is relatively affordable. The barrel composting toilet set up for two people in full time use should cost in the neighborhood of $300 to $350. This is much less expensive than a standard commercial composting toilet system. So without why don't we begin with the construction? Alright so