The Utilihab Home Composter kit is an automated multi-stage aerobic composter system designed for installation in a supercabinet structure, particularly in kitchen or utility room areas. It is a continuous cycle system which generates compost continually from organic waste.

The system is based on a stack of 4 nesting cylindrical HDPE containers with flanges allowing them to be bolted tightly together and held together as a unit within a light profile frame. Each cylinder features a center ventilation tube. The top three containers feature progressively fine bottom screens, course at top, fine center, and just small weep holes on the bottom perimeter of the third. The bottom container has no holes as it us used for fluid collection. The top container has an airtight cover with a vent tube port and loading port. An optional grinding mill may be fitted to the loading port. The third container features a side-positioned unloading port with side cover suitable for use with a hand scoop. The bottom container features a spigot for fluid drainage. A rod driven by an overhead electric motor with speed reduction gearing turns wire aerator paddles within the three upper compartments. A box fan under the bottom container’s vent tube forces air upward through the containers. And vents odors out through the top vent pipe. Low power electric heater tape and insulator blankets encircles the containers along with taped-on thermostat sensors, all linked along with fan and top motor to a microcontroller that regulates the temperature of the containers and the rate of turning for the aerator paddles.

The system operates by turning and screening each layer of compost until it filters to the third level as a fine grained finished compost mixture. The bottom level liquid compost tea is collected as liquid fertilizer. The microcontroller runs a simple program to maintain an optimal temperature in each container for its stage of decomposition while periodically turning the aerator paddles. This ‘hot’ aerobic form of composting provides rapid breakdown, seed and pathogen sterilization, and reduces smells and fungus growth, making the system suitable for indoor use.

[This design concept needs further exploration and experimentation. Identifying off-the-shelf containers suited to some variation of this configuration would be desirable]