A grit removal unit for a wastewater system including a grit removal chamber with a substantially annular vertical wall. A horizontal annular ring above the chamber bottom extends inwardly from the annular vertical wall, with an influent channel extending into the chamber beneath the ring and an effluent channel above the rim and extending out of the chamber. The influent and effluent channels both have inner side walls with a curved portion, with both curved portions extending through an arc of at least 90 degrees within the chamber annular vertical wall.

A passive filter cell having a basin with a floor and two or more vertical or upright sidewalls forming chute or container having first or left sidewall, second or right sidewall, and third or back sidewall, and fourth or front downwardly curved sidewall, an inlet positioned proximate a top of the fourth or front sidewall and an outlet positioned proximate the top of the third or back sidewall, wherein the floor is configured angled from the fourth or front sidewall to the third or back sidewall, discharge pipe positioned proximate junction between the floor and the third or back sidewall, and lip configured to extend from the top of the third or back sidewall into an interior of the basin.

A separator unit includes a tank defining an internal volume and having an inlet and an outlet. A deck within the tank separates the tank into an upper chamber and a lower chamber. A weir at an upper side of the deck defines an inlet side atop the deck for receiving an influent liquid and an outlet side atop the deck, with a first opening through the deck on the inlet side for delivering liquid down into the lower chamber, and a second opening through the deck on the outlet side for delivering liquid from the lower chamber back up into the upper chamber. The separator includes one or more of an integrated drop pipe assembly with a dispersal manifold, a riser pipe with a vortex disrupting vane and/or a weir configuration that in part follows a periphery of the second opening.

A passive filter cell having a basin with a floor and two or more vertical or upright sidewalls forming chute or container having first or left sidewall, second or right sidewall, and third or back sidewall, and fourth or front downwardly curved sidewall, an inlet positioned proximate a top of the fourth or front sidewall and an outlet positioned proximate the top of the third or back sidewall, wherein the floor is configured angled from the fourth or front sidewall to the third or back sidewall, discharge pipe positioned proximate junction between the floor and the third or back sidewall, and lip configured to extend from the top of the third or back sidewall into an interior of the basin.

A device for a centrifugation container, such as a tube, is for separation of liquid fractions having a desired density range, in particular to biological and/or liquids forming suspensions. The device has a partition (7) that separates the interior of the container (1) into at least two chambers in a vertical arrangementan upper chamber (2) and a lower chamber (3). The device having the partition (7) has an aperture (4) which can be lined up with the guide (12), on which liquids, in particular a fluid sample, can flow down from an upper chamber (3) to a lower chamber (4), of the container (1) for centrifugation. A method using the device separates out a fraction having the desired density range from the sample containing fractions of different density.

Provided is A PRP extraction kit comprises: a body that has an upper accommodation space, a lower accommodation space that is located below the upper accommodation space, and a communication passage which communicates the upper accommodation space and the lower accommodation space and of which a fluid passage area becomes narrower as it goes upward or downward, in the interior thereof; a valve unit that is located in the communication passage and allows flow of the communication passage to go only in one direction while being moved by a self-weight based on a change in a vertical position of the body; and a variation means that is coupled to a lower side of the body and vertically moves based on manipulation of a user to vary the volume of the lower accommodation space.

A separator comprises a housing and a separator chamber contained within the housing, an inlet and outlet to the separator chamber and a dividing member for substantially dividing the separator chamber into a first chamber and a second chamber. A flow path is provided between the first and second chambers for allowing flow to circulate between the first and second chambers, and guide means for creating opposing flow paths in the second chamber for slowing flow through the second chamber.

A separator unit includes a tank defining an internal volume and having an inlet and an outlet. A deck within the tank separates the tank into an upper chamber and a lower chamber. A weir at an upper side of the deck defines an inlet side atop the deck for receiving an influent liquid and an outlet side atop the deck, with a first opening through the deck on the inlet side for delivering liquid down into the lower chamber, and a second opening through the deck on the outlet side for delivering liquid from the lower chamber back up into the upper chamber. The separator includes one or more of an integrated drop pipe assembly with a dispersal manifold, a riser pipe with a vortex disrupting vane and/or a weir configuration that in part follows a periphery of the second opening.

A grit removal unit for a wastewater system including a grit removal chamber with a substantially annular vertical wall. A horizontal annular ring above the chamber bottom extends inwardly from the annular vertical wall, with an influent channel extending into the chamber beneath the ring and an effluent channel above the rim and extending out of the chamber. The influent and effluent channels both have inner side walls with a curved portion, with both curved portions extending through an arc of at least 90 degrees within the chamber annular vertical wall.

A passive filter cell having a basin with a floor and two or more vertical or upright sidewalls forming chute or container having first or left sidewall, second or right sidewall, and third or back sidewall, and fourth or front downwardly curved sidewall, an inlet positioned proximate a top of the fourth or front sidewall and an outlet positioned proximate the top of the third or back sidewall, wherein the floor is configured angled from the fourth or front sidewall to the third or back sidewall, discharge pipe positioned proximate junction between the floor and the third or back sidewall, and lip configured to extend from the top of the third or back sidewall into an interior of the basin.