In a wastewater treatment plant a rag seeding tank is included in a process drain to collect hair and fibers which have passed through headworks of the plant. The hair and fibers tend to join together into large masses downstream of the headworks and can be damaging to process zones, particularly membrane zones. The rag seeding tank includes cartridges filled with surfaces that fibers and hair will attach to, so that hair/fiber rags grow in the seeding tank and are removed therefrom rather than causing problems downstream.

A water filtration and recycling system includes an external machine to collect solid particles and water, a first filter to filter the solid particles from the water to form primary filtered water, a second filter to filter the solid particles from the primary filtered water to form secondary filtered water, and a water tank to store the secondary filtered water, wherein secondary filtered water recycles to the external machine in a closed loop. The water filtration and recycling system includes a recycling machine including a clean tank to hold clean water that cycles through the water filtration and recycling system, a dirty tank to hold dirty water that cycles through the water filtration and recycling system, a dirty water in manifold to direct the water into the dirty manifold, a dirty water out manifold to direct the water out of the dirty manifold, a clean water in manifold to direct the water into the clean manifold, and a clean water out manifold to direct the water out of the clean manifold.

A liquid filtration system according to the present invention comprises a bioreactor; a filter configured to filter liquid passing therethrough; a perfusion pump configured to move liquid between the bioreactor and the filter; a liquid line providing fluidic communication between the bioreactor, perfusion pump and filter; and a bleed outlet provided on the liquid line, the bleed outlet configured to provide means to remove liquid selectively from the system under the action of the perfusion pump. With the liquid filtration system according to the present invention, both the filtering and bleed functions may be performed under the action of a single pump, thereby significantly reducing the complexity and cost of the components required.

A water filter system includes an upper chamber removably coupled with a lower chamber. In implementations the lower chamber has a sidewall and a rim wider than the sidewall. A filter medium filters water from the upper to the lower chamber. A seal couples between the chambers and has a circular cross-section and a gap receiving a portion of the sidewall. The seal may also have a cavity receiving the rim. The seal includes one or more arced flaps contacting the upper chamber, a tip of each arced flap defining a circular inner opening of the seal. The seal includes one or more first barbs contacting the upper chamber, each first barb forming a circle. The seal includes one or more second barbs contacting the lower chamber, each second barb forming a circle.

A water treatment filter backwash process control system, comprising a control system that receives filter level data and filter backwash turbidity data. The control system having a filter level set point, wherein the filter level set point corresponds to a desired filter media bed expansion. The control system having a filter backwash turbidity set point, wherein the control system controls the filter backwash process by, while monitoring the filter backwash turbidity, sending one or more output signals that are used to control a backwash inlet liquid flow in order to maintain a desired media bed expansion, and stop the backwash inlet liquid flow when the filter backwash turbidity set point is reached.

A logic that is used in water bar screen assemblies to control the flow of water through the assembly and to methods.

A method and apparatus for monitoring a water pressure in a filter tank are disclosed. The apparatus may include a pressure sensor disposed within a housing and configured to monitor the water pressure in the filter tank. The apparatus may also include a controller disposed within the housing, the controller communicatively connected to the pressure sensor and the controller configured to receive a sensor signal from the pressure sensor, and to determine the water pressure in the filter tank based on the sensor.

The invention described herein is that of an outdoor drain filter useful for maintaining the operability of an outdoor drain despite the accumulation of debris that would otherwise obstruct the outdoor drain, resulting in flood prevention of surrounding areas. The outdoor drain filter of the present invention is placed above and around an existing outdoor drain or may be integral with a drain cover or drain reservoir. The outdoor drain filter comprises upper and side filtration means allowing the free flow of water therethrough. The outdoor drain filter further comprises a diverter comprising at least one air vent and at least one lateral pipe that defines a maximum water level to which water will accumulate around the outdoor drain before being diverted into the drain through the diverter. The outdoor drain filter may a manufactured unit or of modular construction.

A water treatment filter backwash process control system, comprising a control system that receives filter level data and filter backwash turbidity data. The control system having a filter level set point, wherein the filter level set point corresponds to a desired filter media bed expansion. The control system having a filter backwash turbidity set point, wherein the control system controls the filter backwash process by, while monitoring the filter backwash turbidity, sending one or more output signals that are used to control a backwash inlet liquid flow in order to maintain a desired media bed expansion, and stop the backwash inlet liquid flow when the filter backwash turbidity set point is reached.

A filter device including a probe where a filter element probe first end selectively engages with a sensing unit located in a filter head and a filter element probe second end is located in a contaminant portion of a filter canister. The probe fixedly engages through the filter element utilizing a sealing component. The filter element is disposed in the filter canister that engages with the filter head.