Tensioner systems, methods and apparatus are described for tensioning drive belts of vibratory screens.

A vibratory apparatus includes a deck assembly with a longitudinal axis, an inlet end, and an outlet end. The deck assembly includes a plurality of deck sections each having a plurality of openings. Each deck section has upstream and downstream edges, the downstream edge of each successive deck section disposed closer longitudinally to the outlet end than the downstream edge of each preceding deck section. The upstream edge of each successive deck section is disposed closer longitudinally to the upstream edge of each preceding deck section than the downstream edge of the preceding deck section is disposed to the upstream edge of the preceding deck section, thereby defining an overlapping portion of the preceding deck section and a non-overlapping portion of the preceding deck section. The overlapping portion has larger openings than the non-overlapping portion for each preceding deck section.

A vibratory apparatus includes a deck assembly with a longitudinal axis, an inlet end, and an outlet end. The deck assembly includes a plurality of deck sections each having a plurality of openings. Each deck section has upstream and downstream edges, the downstream edge of each successive deck section disposed closer longitudinally to the outlet end than the downstream edge of each preceding deck section. The upstream edge of each successive deck section is disposed closer longitudinally to the upstream edge of each preceding deck section than the downstream edge of the preceding deck section is disposed to the upstream edge of the preceding deck section, thereby defining an overlapping portion of the preceding deck section and a non-overlapping portion of the preceding deck section. The overlapping portion has larger openings than the non-overlapping portion for each preceding deck section.

A method of valuation of raw fines materials, comprising selectively screening, biotreatment or composting of raw fines materials or selection as fillers in composites. The method comprises screening the raw fines materials to Grade 1 comprising fines materials of a size of at most about 5 mm and Grade 2 comprising fines materials of a size larger than about 5 mm; and at least one of: A) bio-oxydating organic contaminants of the Grade 1; by adding and mixing organic amendment under controlled temperature, nutrients content and water content conditions and monitoring a content of organic contaminants until the content of organic contaminants stops decreasing; and B) composting the Grade 1; by adding and mixing organic amendment under controlled temperature, nutrients content and water content conditions, and monitoring pathogens content and respiration rate; and stopping the addition of organic amendment upon detection of absence of pathogens at a predetermined respiration rate.

A method of valuation of raw fines materials, comprising selectively screening, biotreatment or composting of raw fines materials or selection as fillers in composites. The method comprises screening the raw fines materials to Grade 1 comprising fines materials of a size of at most about 5 mm and Grade 2 comprising fines materials of a size larger than about 5 mm; and at least one of: A) bio-oxydating organic contaminants of the Grade 1; by adding and mixing organic amendment under controlled temperature, nutrients content and water content conditions and monitoring a content of organic contaminants until the content of organic contaminants stops decreasing; and B) composting the Grade 1; by adding and mixing organic amendment under controlled temperature, nutrients content and water content conditions, and monitoring pathogens content and respiration rate; and stopping the addition of organic amendment upon detection of absence of pathogens at a predetermined respiration rate.

A multi-deck screening assembly includes upper and lower screen decks, each having first and second deck sections. The upper deck's first deck section has first-size grading apertures, and its second deck section is downstream of the first deck section with second-size grading apertures larger than the first-size apertures. The lower deck's first section has third-size grading apertures and its second section is downstream of its first section with fourth-size grading apertures larger than the third-size apertures. A gap between the lower deck's first and second sections allows oversize material from the lower deck's first section to pass through to a first collection region. A diverter is positioned between the upper and lower decks and over the gap, whereby material from the upper deck collected on the diverter passes onto the lower deck's second section, thereby preventing undersize material that passes through the upper deck from passing directly through the gap.

Devices, systems, and methods for transporting or transferring insect pupae in an aqueous solution are described. The system includes a tank containing a solution with insect pupae, a transfer chamber having an outlet at a bottom portion of the chamber, a solution inlet, an evacuation channel, and a depth measurement system. A tube fluidly connects to tank and the transfer chamber. An evacuation device connected to the evacuation channel removes air from the transfer chamber and generates a vacuum therein to draw the solution through the tube into the transfer chamber.

Devices, systems, and methods for transporting or transferring insect pupae in an aqueous solution are described. The system includes a tank containing a solution with insect pupae, a transfer chamber having an outlet at a bottom portion of the chamber, a solution inlet, an evacuation channel, and a depth measurement system. A tube fluidly connects to tank and the transfer chamber. An evacuation device connected to the evacuation channel removes air from the transfer chamber and generates a vacuum therein to draw the solution through the tube into the transfer chamber.

A removable screen panel assembly for a vibratory screening machine for separating liquids and solids. The screen panel assembly includes a plate, a corrugated screen assembly supported by the plate, hook assemblies connected to opposite ends of the plate, and gaskets connected to the hook assemblies. A first hook assembly has a first end connected to a first end of the plate, a middle portion spaced above first apertures at the first end of the plate, and a second end parallel to the plate. The second end of the first hook assembly and the first end of the plate sandwich a first end of the corrugated screen assembly.

A step-down spring seat assembly secured to a vibratory screen machine is configured to receive one or more universal adapter plate assemblies, to which one or more compression springs is secured. The universal adapter plate assemblies are secured to a top surface of the step-down spring seat assembly, and one or more spring guide castings are connected to the one or more universal adapter plate assemblies. Compression springs are positioned atop the spring guide castings, and are secured to a top adapter plate assembly that is connected to one or more universal adapter plate assemblies positioned above the one or more compression springs.