On-site bio-digestion of food waste one of the most economical and viable ways to reduce carbon footprint, greenhouse gases, street congestion and related nuisance of food waste storage. Using existing sewer infrastructure to carry digested food waste effluent eliminates truck traffic, street congestion and diesel emissions – microorganisms in the waste flow generated in the digestor may even aid in further breaking down fat, oil and grease in the sewer lines. Many jurisdictions have banned landfill food waste disposal making an on-site disposal option more urgent.
Patriot Digestion Process
The Patriot digester operates in an environment where a minimal amount of water is delivered to the processing chamber to facilitate digestion and effluent flow. Patriot adds biological agents in the form of microorganisms and enzymes which enhance decomposition -- much like the human digestion system. Mechanical churning through Patriot’s unique auger system keeps the food waste aerated – or operating in an aerobic state, i.e. with oxygen present. Food waste is reduced to a slurry which is then filtered through a screen to reduce suspended solids. The process generates carbon dioxide but not methane, a damaging green house gas. Operating in an aerobic state maximizes the breakdown of organics material and minimizes odor generation.
The wet digester requires a power and water source, and access to a sanitary drain. The unit is typically located in the “back of the kitchen” and near waste storage. This is a continuous feed process – food waste can be added anytime as it is generated thereby eliminating food waste storage issues. This reduces costs and eliminates the odor, leaks, and pests associated with the use of dumpsters and bins.
Effluent of Wet System
The system effluent can be applied for agricultural purposes. The effluent can be discharged directly into a sanitary sewer or can be beneficially re-used as compost feed.