Filter systems disclosed herein collapse for storage purposes and include mechanisms to continuously fill an upper chamber, allowing it to be smaller and to include more filters. A UVC light in a lower chamber sanitizes water entering therein. Water entering the lower chamber may pass through a quartz tube near the UVC light for sufficient exposure. The UVC light may be cycled between shorter periods of higher intensity and longer periods of lower intensity. A low power source such as a small solar array and/or battery may power the UVC light. A proximity switch may control the UVC light by providing power to the light only when the upper chamber is engaged with the lower chamber which may protect the user from exposure to the UVC light. Sealing mechanisms between the upper and lower chambers, as well as tote mechanisms and an alternative bucket filter system are disclosed.

There are provided a sludge treatment device 100 and a sludge treatment system 400 comprising: a primary tank 110 into which a liquid flows from a machine tool 300 side; a secondary tank 120 from which a liquid inside flows out to the machine tool 300 side; a first flow path 130 that supplies the liquid in the primary tank 110 to the secondary tank 120; a filter 134 disposed on the first flow path 130; a second flow path 140 different from the first flow path 130 connecting the primary tank 110 and the secondary tank 120; and a liquid inflow amount adjustment means 142 configured to adjust an inflow amount of liquid flowing from the secondary tank 120 into the primary tank 110 through the second flow path 140, wherein a second flow path liquid supply path 150 is provided to cause the liquid in the primary tank 110 to flow from the secondary tank 120 side toward the primary tank 110 side from a middle of the second flow path 140.

A filter press, including a housing, which receives a liquid to be filtered that contains particles to be separated off, and a pressing device arranged in the housing for pressing the liquid through a filter device, wherein the pressing device, which rotates about a vertical axis, has at least one cross-sectionally round pressing element which rotates about an axis of rotation situated at an angle to the vertical axis and which has an outer casing formed from an elastic material, by which the pressing element rolls on the filter device, wherein the filter device includes a filter and, upstream of the filter, a filter plate which has a plurality of apertures which are open toward the pressing element and each of which has a cross section reducing toward the filter.

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.

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 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.

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.

Logic that is used in water bar screen assemblies to control the flow of water through the assembly.

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.