The invention pertains to a method to purify coccidial oocysts having dimensions between Dmin and Dmax from faeces comprising the steps of collecting the faeces containing the coccidial oocysts from host animals, diluting the faeces in an aqueous medium, separating a coarse fraction comprising macroscopic particulate matter from the diluted faeces and collecting an aqueous fraction containing the oocysts, characterised in that the method further comprises sieving the aqueous fraction over a first sieve deck having mesh openings to let the oocysts pass, to obtain an aqueous filtrate comprising the oocysts and a first residue comprising particles larger than the oocysts, and sieving the aqueous filtrate over a second sieve deck having mesh openings to obstruct passing of the oocysts through this sieve deck, to obtain a second residue comprising the purified oocysts and a waist filtrate comprising particles smaller than the oocysts. The invention also pertains to a system suitable for applying this method and to oocysts obtained therewith.

The invention pertains to a method to purify coccidial oocysts having dimensions between Dmin and Dmax from faeces comprising the steps of collecting the faeces containing the coccidial oocysts from host animals, diluting the faeces in an aqueous medium, separating a coarse fraction comprising macroscopic particulate matter from the diluted faeces and collecting an aqueous fraction containing the oocysts, characterised in that the method further comprises sieving the aqueous fraction over a first sieve deck having mesh openings to let the oocysts pass, to obtain an aqueous filtrate comprising the oocysts and a first residue comprising particles larger than the oocysts, and sieving the aqueous filtrate over a second sieve deck having mesh openings to obstruct passing of the oocysts through this sieve deck, to obtain a second residue comprising the purified oocysts and a waist filtrate comprising particles smaller than the oocysts. The invention also pertains to a system suitable for applying this method and to oocysts obtained therewith.

Screening bucket (1) provided with a box-type frame (10) having at least a first space (20) suitable to house a first screening basket (28) rotatable around a first pivot axis (40)(40); frame (10) having a mouth portion (12)(12) and a longitudinal closing member (11) (11) for each space (20)(20); each first bucket (28)(28) being closed at the back; frame (10) comprises at least one second space (20) adjacent to first space (20) and suitable to house a second screening basket (28) rotatable around a second pivot axis (40) parallel to first pivot axis (40).

Screening bucket (1) provided with a box-type frame (10) having at least a first space (20) suitable to house a first screening basket (28) rotatable around a first pivot axis (40)(40); frame (10) having a mouth portion (12)(12) and a longitudinal closing member (11) (11) for each space (20)(20); each first bucket (28)(28) being closed at the back; frame (10) comprises at least one second space (20) adjacent to first space (20) and suitable to house a second screening basket (28) rotatable around a second pivot axis (40) parallel to first pivot axis (40).

This application describes method and systems for recovering metals from metal-containing material. Some embodiments of the disclosed method include one or more of the following three steps: (1) sizing, (2) separating using the helix separator, and (3) collecting. A system can execute these steps.

An apparatus for removing sand from a well fluid includes a pressure vessel having an inlet and an outlet. The well fluid flows into the pressure vessel through the inlet and flows out of the pressure vessel through the outlet. A screen is positioned at least partially within the pressure vessel and configured to remove the sand from the well fluid. At least a portion of the sand that is removed from the well fluid at least partially obstructs one or more openings in the screen. A cleaning assembly is positioned at least partially between the pressure vessel and the screen and configured to remove the sand that is obstructing the one or more openings in the screen during a screen-cleaning operation.

An apparatus for removing sand from a well fluid includes a pressure vessel having an inlet and an outlet. The well fluid flows into the pressure vessel through the inlet and flows out of the pressure vessel through the outlet. A screen is positioned at least partially within the pressure vessel and configured to remove the sand from the well fluid. At least a portion of the sand that is removed from the well fluid at least partially obstructs one or more openings in the screen. A cleaning assembly is positioned at least partially between the pressure vessel and the screen and configured to remove the sand that is obstructing the one or more openings in the screen during a screen-cleaning operation.

A container such as a barrel or drum is provided for processing of solid material or parts with a liquid. The container is designed with grooves leading to holes or slots in the side that draw liquid into the container due to the rotation of the container when it is immersed in a tank of liquid. The holes or slots have a small dimension in the direction of rotation to minimize the probability of solid material coming out of the container. The fluid flow caused by the rotation serves to increase the rate of solution replacement inside the container as well as to keep the solid material from falling out through the holes or slots. The container disclosed is useful in processes in the plating, etching, leaching, and surface finishing industries.

A container such as a barrel or drum is provided for processing of solid material or parts with a liquid. The container is designed with grooves leading to holes or slots in the side that draw liquid into the container due to the rotation of the container when it is immersed in a tank of liquid. The holes or slots have a small dimension in the direction of rotation to minimize the probability of solid material coming out of the container. The fluid flow caused by the rotation serves to increase the rate of solution replacement inside the container as well as to keep the solid material from falling out through the holes or slots. The container disclosed is useful in processes in the plating, etching, leaching, and surface finishing industries.

A sheet manufacturing apparatus that shortens the time until the apparatus stops is provided. The sheet manufacturing apparatus has a sieve unit having at least part of material defibrated in a defibration process introduced thereto, moving at a first speed, and passing defibrated material through multiple openings disposed in the main section thereof; and a forming unit forming a sheet using precipitate that past through the openings of the sieve unit; the sheet manufacturing apparatus stopping the sieve unit with defibrated material that was introduced stored inside the sieve unit when production by the sheet manufacturing apparatus stops.