[Object] To provide a mixing device capable of accurately mixing a solution in a multi-well plate.

[Solving Means] A mixing device 1 is configured to be attachable to a multi-well plate 30 and includes a casing 100, a plurality of stirrers 11, a plurality of motors 12 as a drive portion, and a mounting portion 16. The casing 100 includes a main surface portion 101 facing an upper surface 301 of the multi-well plate 30. The stirrers 11 protrude from the main surface portion 101 toward wells 31 of the multi-well plate 30. The motors 12 are disposed to the casing 100 and rotate the stirrers 11 about axes thereof. The mounting portion 16 is provided to the casing 100 and is mounted to the multi-well plate 30 to position the casing 100 on the multi-well plate 30.

A kneading machine for food doughs includes a kneading bowl, one or more tool shafts rotatably mounted in a housing, a kneading tool attachable to the tool shaft and insertable into the kneading bowl, and a kneading space,each tool shaft being assigned a seal carrier fixed to the housing and which carries a seal arrangement to seal the tool shaft with respect to the seal carrier, the seal carrier being spaced from the tool shaft by a first gap outside the kneading space and which communicates directly with an escape space for food particles escaping out of the kneading space.

A kneading machine for food doughs includes a kneading bowl, one or more tool shafts rotatably mounted in a housing, a kneading tool attachable to the tool shaft and insertable into the kneading bowl, and a kneading space,each tool shaft being assigned a seal carrier fixed to the housing and which carries a seal arrangement to seal the tool shaft with respect to the seal carrier, the seal carrier being spaced from the tool shaft by a first gap outside the kneading space and which communicates directly with an escape space for food particles escaping out of the kneading space.

Vessel configured to facilitate concentration of a product in a solution. The vessel may include outlet ports to deliver the solution to a processing system (such as a filtration system), and inlet ports. The inlet ports may be at progressively lower levels for return of fluid thereto reduced in volume as a result of filtration thereof. A smaller volume sump may be provided below a main tank of the vessel to facilitate concentration of the solution. The sump may include ridges facilitating collection of the product of interest from the solution, and/or reinforcing the sump walls, and optionally forming a vortex breaker. A spray ball may be provided to spray materials, such as buffer solution, into the vessel. The spray ball may direct materials to facilitate retrieval of product from the vessel. One or more components of the vessel may be advantageously formed of disposable material for single use thereof.

A system for growing algae includes a pivot arm pivotally coupled to a pivot connection positioned in a pond containing water and algae, and a mixing device coupled to the pivot arm and extending into the pond to mix the water and the algae as the pivot arm rotates.

A system for growing algae includes a pivot arm pivotally coupled to a pivot connection positioned in a pond containing water and algae, and a mixing device coupled to the pivot arm and extending into the pond to mix the water and the algae as the pivot arm rotates.

A mixing tank is disclosed for reducing ingestion across an interface. The tank may include a first zone including most of the volume of the tank; a second zone including the interface; a source of mixing energy configured to provide a first bulk energy dissipation rate in the first zone; a divider located between said first zone and said second zone inhibiting transfer of said mixing energy from said first zone to said second zone to preserve in said second zone a bulk power dissipation level less than a said first bulk power dissipation level; and a mass transport passageway between said first zone and said second zone for preserving a uniformity between the first and second zones. A method is disclosed for manufacturing a mixing tank and for retrofitting and existing mixing tank and for managing mixing to prevent air ingestion.

A method of developing a predictive model may include identifying mixing protocol parameters for the predictive model, identifying an evaluation criterion for the predictive model, selecting test values for the mixing protocol parameters, identifying a computational fluid dynamics (CFD) simulation required to be performed in order to generate the evaluation criteria, conducting the CFD simulation for each combination of test values, thereby generating evaluation criteria corresponding to each combination of test values, generating a domain of potential predictive models relating the mixing protocol parameters to the evaluation criterion, identifying a pool of candidate predictive models from the domain of potential predictive models, and ranking the pool of candidate predictive models.

The unique shape of the helical beater described herein not only achieves higher mixing performance but also power efficiency. By using high strength plastics instead of metal, the improved helical beater design described herein will lower or fix material and manufacturing costs and will provide a better method of controlling the geometry of the beater body.

A wastewater purification apparatus includes an elongate tank, which has an inflow for feeding wastewater, a first vertical agitator with a first hyperboloid agitator body mounted on a vertical first agitator shaft and provided in a first treatment portion downstream of the inflow on the first narrow side, a second vertical agitator with a second hyperboloid agitator body mounted on a vertical second agitator shaft and provided in a second treatment portion downstream of the first vertical agitator, an aeration device with a fan for aerating wastewater received in the tank, a first drive device for rotating the first hyperboloid agitator body in a first rotation direction, a second drive device for rotating the second hyperboloid agitator body in a second rotation direction opposite the first rotation direction, and a decanter for discharging purified wastewater in a third treatment portion on a second narrow side opposite the first narrow side.