With garbage dumps becoming full it has become very important to find an alternative to simply tossing your pet's waste into the trash. I have always liked the idea of composting my pet's waste, but didn't want to add it to my garden compost. That is why I decided to build a separate composter specifically for doggy doo. I had originally planned to purchase a dog waste composter, but quickly realized that I need a much bigger one than is on the market in order to handle all of the waste from my 70 lb. Labrador Retriever. Big dog, Big poop, Big composter. I decided to create this Instructable to help others deal with their pets waste in an environmentally sound manner.
Tools & Materials: All that you will need to build a waste composter is a shovel, a saw, a drill, 4" pvc pipe, and a vessel of some sort.
First find your vessel. I decided to use a salvaged plastic 55-gallon barrel and give it a third life. A 5-gallon bucket or a trash can would work if you have a small dog. Rather than recycling the barrel I simply reused it. I got it from our local coffee roaster and used it as a leaf composter for a couple years. Be careful that you don't use a barrel that may have had toxic chemicals in it. Mine used to be full of French vanilla flavoring. That stuff is fairly harmless.
I have also entered this Instructable in the Epilog Challenge, so please remember to vote.
Step 1: Preparing the Vessel
Take your vessel and drill holes everywhere except the top and bottom. Any bit size ranging between 1/4-inch and 3/4-inch will suffice. The holes need to be large enough to allow air to reach your composter, but not large enough to allow soil to fall through.
If you are using a barrel you will need to cut the top off. The open end will become the bottom of the compster. This will increase the surface area that is exposed to the soil and allow rain water to drain easily.
Next cut a circular hole into what will be the top of your composter. I cut a 4-inch hole into mine because I decided to use a 4-inch inside diameter (ID) pvc pipe as the access port for my composter. It's good to have a hole large enough to allow the dog waste to fall into the vessel without the need of a push-stick. The 4-inch ID pvc fits perfectly over the 4-inch hole without the danger of falling in. I was able to find a waste cut piece of pipe that was headed for the dumpster.