Provided herein are devices, systems, and methods for disposal of needles. In particular, provided herein are devices, systems, and methods for safe and efficient disposal of medical and research needles.

A blower casing having an inlet in a side wall thereof and having an outlet in an upper portion of a peripheral wall thereof, and an impeller to rotate within the blower casing take in a composite including solid resin through the inlet and throw the solid resin radially outward and toward the outlet, are included. Multiple crushing blades each of which is in the form of a saw blade are arranged at intervals on an inner peripheral surface of the peripheral wall of the blower casing, the multiple crushing blades being configured such that the solid resin is crushed by collision with the multiple crushing blades.

Method and apparatus for fracturing particulates during an air mill process. In some embodiments, a disc assembly is rotated within a housing about a central axis. The disc assembly includes a horizontally extending annular ring with opposing innermost and outermost edge surfaces. A retention flange extends adjacent the outermost edge surface of the annular ring. Spaced apart impellers project from an upper surface of the annular ring for movement in a direction of rotation of the annular ring to form an inner zone of lower pressure surrounded by an outer zone of higher pressure. During air mill processing, an inlet stream of particulates is introduced to the inner zone to induce collisions among previously introduced particulates into the inner zone. Reduced-sized fractured particulates are removed from the inner zone using a negative pressure supplied via a vacuum line.

A crushed polycrystalline silicon lump is provided in which a surface metal concentration is 15.0 pptw or less and preferably 7.0 to 13.0 pptw, and in the surface metal concentration, a surface tungsten concentration is 0.9 pptw or less and preferably 0.40 to 0.85 pptw, and a surface cobalt concentration is 0.3 pptw or less and preferably 0.04 to 0.08 pptw.

Non-limiting embodiments of the present disclosure relate to a method comprising: obtaining asphalt shingle waste (ASW) and performing grinding, screening, and separating steps on the ASW. In some embodiments, granules are removed from the ASW. In some embodiments, the method transforms ASW into ASW powder. In some embodiments, the ASW powder is formed into a plurality of briquettes. In some embodiments, at least one of: the ASW powder, the plurality of briquettes, or any combination thereof is fed into a mixing process that results in an ASW powder filled coating.

A bone grinder is provided herein. The bone grinder may have a grinding chamber, an intermediate zone, and a primary cutting element and a secondary cutting element. The intermediate zone may have a first wall and a second wall within the grinding chamber, and the intermediate zone may separate the primary cutting element from the secondary cutting element. The first wall and the second wall may slope inward such that a distance between the first wall and the second wall generally decreases from the primary cutting element to the secondary cutting element. The primary cutting element and the secondary cutting element may be positioned within the grinding chamber to sequentially perform primary cutting operations and secondary cutting operations on a bone. A drive mechanism may operatively engage the primary cutting element and the secondary cutting element.

The invention is a plastic bottle crusher that includes a vacuum nozzle creating suction to compress the bottle via a manual pump or electric motor and a series of cutting blades in order to chop and shred plastic bottles of multiple sizes. The invention also includes an excess water chamber as well as variable sized detachable sleeves based on bottle size with mechanical blades to remove bottle labels as well as a vertical guide to provide maximum compression for air removal, plastic preparation for recycling and placement of crushed bottles into a recyclable housing.

The present invention relates to a high-speed dewatering and pulverizing turbine (1) for obtaining solid pulverized particles and dissociating the water present, which is formed by: a) a stator (6) having circular geometry with a duct at one end (7) for the outlet of the solid pulverized particles and a duct in the bottom part (10) for the inlet of solid particles to be pulverized; b) a wheel or rotor with vanes or blades, located inside the stator; and c) a central securing assembly for adjusting and securing all the elements that form the wheel or rotor. Also described is a method for obtaining solid pulverized and dewatered particles, wherein the water present is separated.

Non-limiting embodiments of the present disclosure relate to a method comprising: obtaining asphalt shingle waste (ASW) and performing grinding, screening, and separating steps on the ASW. In some embodiments, granules are removed from the ASW. In some embodiments, the method transforms ASW into ASW powder. In some embodiments, the ASW powder is formed into a plurality of briquettes. In some embodiments, at least one of: the ASW powder, the plurality of briquettes, or any combination thereof is fed into a mixing process that results in an ASW powder filled coating.

A grinding apparatus includes: a rotating body configured to include therein a channel extending up to an opening formed in its own outer peripheral surface, the rotating body being configured to be capable of accommodating in the channel the substance to be ground and a grinding medium capable of grinding the substance to be ground; and a grinding container configured to include therein an accommodation space accommodating the rotating body and an opposed surface opposed to the opening of the rotating body, the opposed surface extending annually about the center axis of the rotating body. The grinding medium and the substance to be ground are capable of being moved from the channel to the accommodation space through the opening by rotating the rotating body. The grinding apparatus that can efficiently grind a substance to be ground can be realized.