The invention concerns a method for treating a mixture of wastes (4) comprising biodegradable wastes, the method being characterized in that it includes the following successive steps: Step A: the mixture of wastes (4) is subjected to a first composting cycle so as to obtain a mixture of pre-composted wastes (4), Step B: the mixture of pre-composted wastes (4) is subjected to a drying so as to obtain a mixture of dried wastes (4), Step C: the mixture of dried wastes (4) is separated into at least a portion of heavy wastes (14) and a portion of light wastes (13), Step D: the portion of light wastes (13) is subjected to a second composting cycle to so as to obtain a mixture (4) of refined wastes (20). Treatment of biodegradable wastes.

A digester system comprising a primary digester tank containing a primary feed material portion, a secondary digester tank containing a secondary feed material portion, a first conduit connected between the primary digester tank and the secondary digester tank to define a primary tank lower opening within the primary digester tank and a secondary digester tank lower opening within the secondary digester tank, and a flow control valve configured to allow or prevent flow of fluid through the first conduit. When the flow control valve is configured to allow flow of fluid through the first conduit, a portion of the primary feed material portion flows from the primary digester tank to the secondary digester tank to form the secondary feed material portion.

A method of determining the volume of organic material in a composting device includes rotating a mixing paddle in a composting bin that stores the organic material; monitoring the torque from a motor that rotates the mixing paddle as the mixing paddle rotates; and determining the height of the organic material in the composting bin based on the motor torque and the angular displacement of the mixing paddle. The resulting height can be used to determine the volume of the organic material.

A mobile, self-contained system for enhancing plant growth comprising: a mobile structure comprising a plurality of wheels so that the system can be moved; a vessel supported by the structure; a recirculating pump supported by the structure and exterior to the vessel, the pump having a first discharge line and a second discharge line; a generator supported by the structure; a vessel outlet from a bottom portion of the vessel to the pump; and an aerator for injecting air into the first discharge line; wherein the first discharge line extends from the pump directly into the bottom portion of the vessel, such that the contents of the vessel can be recirculated by the pump from the vessel outlet back into the vessel through the first discharge line and the second discharge line extends from the pump and is adapted for discharging contents of the vessel directly into an irrigation system.

An assemblable appliance and method of recycling organic waste into biogas and liquid fertilizer, implementing essentially anaerobic digestion processes, is described. The assemblable appliance includes: a pliant structured exoskeletal envelope, pliable collapsible anaerobic digester and gas tank. A compact kit-of-parts for assembling the aforementioned appliance and respective method using the aforementioned appliance for recycling organic waste into biogas and liquid fertilizer are described.

The object of the invention relates to a composting drum (1) used with drum composters, a shell (3) of which composting drum (1) has perforations (4), the composting drum (1) has an opening (7) suitable for inserting material to be composted, where the shell (3) of the composting drum (1) is provided with perforations (4) suitable for the removal of the compost particles and the perforated shell (3) of the composting drum (1) is covered in a removable way with a semipermeable membrane (6) at least over the part with perforations (4). The object of the invention also relates to drum composters containing such a composting drum (1), to a composting method performed with such a composting drum (1), and to a semipermeable membrane (6) for use with such a composting drum (1).

A rotary composter includes a rotatable composting drum, a motor for rotating the drum, an aeration system for supplying air to the drum and an open-loop computerized controller for controlling one or both of the motor and the aeration system based on animal growth data. The rotary composter may also have a wireless nitrogen gas sensor for sensing an amount of nitrogen gas in the drum and a load cell for measuring a mass inside the drum to enable the controller to further control one or both of the motor and the aeration system based on signals from the nitrogen gas sensor and the load cell.

A rotary composter includes a rotatable composting drum, a motor for rotating the drum, an aeration system for supplying air to the drum and an open-loop computerized controller for controlling one or both of the motor and the aeration system based on animal growth data. The rotary composter may also have a wireless nitrogen gas sensor for sensing an amount of nitrogen gas in the drum and a load cell for measuring a mass inside the drum to enable the controller to further control one or both of the motor and the aeration system based on signals from the nitrogen gas sensor and the load cell.

A process for producing a commercial soil additive comprises mixing a compost composition with elementary (raw) sulphur to form a mixed material and turning the mixed material until it is substantially homogenous and until there is microbial oxidation of elementary sulphur therein to at least one sulphate.

A method of enhancing plant growth comprises a) selecting a mobile, self-contained system comprising a mobile structure, a vessel supported by the structure for receiving water and nutrients, a recirculating pump, a generator powering the pump, and a discharge line adapted for discharging contents of the vessel directly into an irrigation system; b) introducing into the vessel water and nutrient; c) moving the system; d) after moving, coupling the discharge line to an irrigation system or spray; and e) pumping the water and nutrient in the vessel with the pump out of the vessel through the discharge line directly into the irrigation system or spray.