An improved waste disposer having shredding means in a comminution chamber and a rotor rotatable within the chamber. Freely rotating impellers are provided on the rotor which rotate as the rotor is rotated. Each impeller includes at least one main cutting blade adapted to cooperate with the shredding means to comminute waste in the chamber. Each impeller also includes one or more subsidiary cutting blades for assisting in grinding such waste. The blades on one impeller are mounted in a mirror im...

Installation for compacting waste. This installation consists of a partition pump fitted in a chamber, the changing volume being determined by the partitions and the wall of the chamber. A closable inlet is fitted, while the wall of the chamber can be designed as a hinged wall in the vicinity of the outlet. Scrapers can be provided to ensure that all of the waste remains in the outlet. The outlet can open into a conventional waste container.

A plastic waste can for collection of flammable waste has a self-closing cover disposed on a body portion or receptacle. A foot pedal situated in a channel formed in the bottom wall of the body portion and pivotally secured therein is depressed by a user to raise a lift bar which engages the cover to raise the cover. A cover lift accelerator is provided on the undersurface of the cover, with a hinge pin hingedly connecting the cover to the body portion through first and second hinge pin supports...

A method for the production of heat comprises composting solid organic waste, preferably in admixture with sewage sludge, and burning the composted waste, for example in a kiln for calcining an inorganic calcinable material. The composted waste preferably has a water content of less than 20% by weight, more preferably from 10 to 20% by weight. The organic waste is preferably composted in a rotating drum preferably for an average residence time of from 12 to 48 hours. The invention also provides ...

A method, system, apparatus and program for effecting the decomposition of organic waste material comprises: providing a treatment tank for decomposition of organic waste material, the treatment tank containing an active biomass comprising at least one bacteria that decomposes organic material; providing at least two inlets to the treatment tank, a first inlet comprising an inlet for organic material and a second inlet comprising an inlet for an aqueous stream; a processor that receives and stor...

A municipal or like refuse is crushing, mixing with crushed limestone, dry up in two stages--by hot air and by part of solid products of pyrolysis which other part goes on washing out and filtration. Pyrolysis is carried out in two stages--due to heat of the specified part of solid products of pyrolysis and simultaneous neutralization of allocated hydrogen chloride by limestone with reception of calcium chloride, and then due to heat of final chimney gases of the combustion chamber, where in thr...

A method of incorporating a material in a settable binder is disclosed. The binder includes a source of caustic magnesium oxide. The method involves mixing the material with the binder, either as part of a slurry or for subsequent formation into a slurry, and then adding a setting agent to the slurry. The setting agent is added to enhance setting of the binder. The material can be a hazardous waste material or components thereof. The inventors have surprisingly discovered that when the setting a...

The present invention includes an apparatus and method for processing solid waste products. The apparatus comprises a rotatably mounted cylindrical vessel having a first end, a second end and an interior surface, at least one end terminating in a hatch that may be opened to allow access to the interior of the vessel and sealably closed to allow pressurization of the vessel; a steam inlet for injecting stem disposed at one or both ends; a plurality of substantially straight blades protruding from...

A method of medical waste disposal comprising (a) positioning an open end of a container relative to a hood assembly such that the hood assembly substantially covers the open end of the container; (b) depositing medical waste in the container through a passage defined by the hood assembly until the container is at least partially full; (c) placing a lid over the open end of the container such that the open end is substantially closed; (d) disposing of the container; (e) sterilizing the hood asse...

A variety of methods for operating a chromatography system are presented. Specifically, methods for operating a pumping system within a chromatography system are presented. The methods presented are directed to pumping apparatus in which very small amounts of fluid are pumped through the system. A number of techniques for detecting and compensating for leaks are presented as well as a number of techniques for operating the pumping system.