Anaerobic digestion (without oxygen) is a series of processes in which microorganisms break down biodegradable material in the absence of oxygen.
Step 1 - Throw dog waste and biodegradable bag in Digester
Step 2 - Stir mixture to help Methane rise to the top
Step 3 - Burn Methane
Basically, any organic material (in this case dog waste) put in an "air-tight" container will start to produce methane. A methane digester is any system that is filled with biodegradable material and closed off from an oxygen supply. To make it a usable system, you must have some sort of control value (hose or pipe with cut-off value) to let out the methane produced to burn.
Methane is a gas that contains one atom of carbon and four atoms of hydrogen (CH4 ). It is the major component of the "natural" gas used in many homes for cooking and heating. It is odorless and colorless.
Anaerobic bacteria are some of the oldest forms of life on earth. Anaerobic decomposition occurs naturally in swamps, water-logged soils and rice fields, deep bodies of water, and in the digestive systems of termites and large animals. Anaerobic processes can be managed in a "digester". The primary benefits of anaerobic digestion are nutrient recycling, waste treatment, and odor control.