The invention relates to a horizontal agitator for producing a flow in a clarifier, a submersible motor (1) and a propeller (3) drivingly connected thereto forming an assembly unit (M), wherein a receiving portion (A) for removably attaching the assembly unit (M) is provided and can be supported on the bottom (Bo) of the clarifier, and wherein a guide for guiding the assembly unit (M) along a substantially vertical movement path between a surfacing position above a maximum nominal sewage level (N) defined for the clarifier and the receiving portion (A) is provided. In order to improve the efficiency of the horizontal agitator and to reduce complexity of manufacture, the guide is formed by at least one first cable (S) extending between the surfacing position and the receiving portion (A).

A system and process for removing solids from raw, untreated liquid that combines mechanical techniques, such as via shakers, hydrocyclones author centrifuges, with an additive technique for removal of smaller solids. The additive is selected according to the application. In drilling mud applications, preferred additive embodiments are polyaluminum chloride or polyacrylamide flocculants. Preferably, liquid additive precursors are pre-mixed separately and are then blended before injection into the solids removal process. Some embodiments provide an externally-actuated rack and pinion mud screen lock for simplified screen lockdown on shakers. Some embodiments provide a separate preliminary processing and feed system for pretreatment of the raw, untreated liquid.

A method for controlling a treatment apparatus arrangement in a treatment plant, the treatment plant including a basin housing a liquid and solid matter. The operating condition in the basin is anoxic and/or anaerobic, and the treatment apparatus arrangement includes at least one mixer machine located in the basin and a variable speed drive operatively connected to the mixer machine. The variable speed drive operates the mixer machine alternately in a Normal Operation Mode, in which an operational speed of the mixer machine is at least the greater of a suspension speed and a process speed, and a Reduced Operation Mode, in which the operational speed of the mixer machine is below the suspension speed. Also described is a treatment apparatus arrangement and a treatment plant, respectively.

A method in which a stream of dry cementitious powder from a dry powder feeder passes through a dry cementitious powder inlet conduit to feed a first feed section of a fiber-slurry mixer. An aqueous medium stream passes through at least one aqueous medium stream conduit to feed a first mixing section the fiber-slurry mixer. A stream of reinforcing fibers passes from a fiber feeder through a reinforcing fibers stream conduit to feed a second mixing section of the fiber-slurry mixer. The stream of dry cementitious powder, aqueous medium stream, and stream of reinforcing fibers combine in the fiber-slurry mixer to make a stream of fiber-cement mixture which discharges through a discharge conduit at a downstream end of the mixer.

A chemical treatment apparatus for diluting and activating a polymeric material can include a mixing chamber having a first end, a second end, a first baffle plate positioned between the first end and second end, a high shear mixing zone positioned between the first end of the mixing chamber and the first baffle plate, and a low shear mixing zone positioned downstream from the high shear agitation zone between the second end of the mixing chamber and the first baffle plate. The volume ratio of the high shear mixing zone to the low shear mixing zone can be in the range of 1:2 to 1:10. A method and system for diluting and activating polymeric materials are also disclosed.

The invention relates to a horizontal agitator for producing a flow in a clarifier, a propeller being connected to a submersible motor which is axially offset in relation thereto, wherein the propeller and the submersible motor are designed such that a flow in a direction from the propeller towards the submersible motor is produced when the submersible motor is operated, and wherein plate-shaped flow guide elements are provided downstream of the propeller and extend in at least an axial plane that runs substantially parallel to the propeller axis. In order to improve the efficiency of the horizontal agitator, it is proposed in accordance with the invention to support the submersible motor on a bottom of the clarifier via at least two first flow guide elements.

A system for recycling cooling devices, comprising a system part for catalytically oxidizing the pure hydrocarbon compounds and chlorofluorocarbons which accumulate during the recycling of the cooling devices. According to the invention, this system part comprises two reactors, provided mutually separated in the flow direction of the gases to be treated, a first reactor being used for catalytically oxidizing the pure hydrocarbon compounds while a second reactor is used for catalytically oxidizing chlorofluorocarbons.

The present invention pertains to an oxygen dissolution device. According to the device, the oxygen and water introduced into the housing are agitated and mixed with each other by eddies and currents formed by the plurality of first smashing blades and the second smashing blades, then converted into oxygen-dissolved water having a large amount of dissolved oxygen. Therefore, an amount of oxygen which is not dissolved in the water to be waste may be decreased so as to reduce purchase costs of oxygen, as well as, when supplying the oxygen-dissolved water having a large amount of dissolved oxygen as described above to a fish farm, the amount of dissolved oxygen of the water in the fish farm may be rapidly adjusted to a level which is suitable for the farmed fish to live in.