The present invention relates to a method for liquid media purification, such as potable water, where biological and chemical composition of fluid to be purified is enhanced. The invention also relates to a device for carrying out said method. According to the invention, the liquid is purified by removing coarse particles from said liquid on first filtering means (2), dispersing the liquid with at least one nozzle (3) into a working chamber (4), where it is exposed to a working pressure and gas or gas mixture is introduced in the chamber from at least one inlet aperture (5).

This specification discloses a system and method for treating process water from a starch process, and more specifically, recycling a concentrated sodium sulfate solution, obtained from the process water to the starch process.

A system for cleaning feed water of variable quality, the system comprising an inlet for selectively delivering feed water (FW) to one or other of at least two feed chambers (2,4), each feed chamber having a delivery pipe (2i, 4i) for delivering feed water to a reverse osmosis or nanofiltration (8); a pump (6) to deliver the feed water from one of the chambers (2, 4) through its associated delivery pipe (2i, 4i) to the reverse osmosis or nanofiltration (8) to create a concentrated feed stream and a product water stream (PW); return pipes (2R, 4R) for selectively returning the concentrated feed stream to one or other of the at least two feed chambers (2, 4); a product water outlet for removal of the product water (PW); and means for switching the delivery of the concentrated feed stream between the selectable return pipes (2R, 4R) upon detection of a predetermined reduction in the efficiency of the RO or NF process within one or other of the feed chambers (2, 4). The pressure of the concentrated feed stream is reduced to atmospheric pressure prior to its delivery back to the chamber and the feed stream passes through a desaturation unit (20).

A nozzle cleaning device for cleaning suction nozzle 62, wherein the jetting direction of water jetted towards the tip section of the suction nozzle is changed by a tapered second internal surface 374 of socket 370. Accordingly for example, not only is it possible to appropriately remove items adhering to the lower surface of the tip of the suction nozzle, it is possible to remove items adhering to the side surfaces of the tip of the suction nozzle by applying water. The suction nozzle is cleaned while being supported by nozzle pallet 152; after the suction nozzle is cleaned, the suction nozzle is held by a holding tool and removed from the nozzle pallet. Accordingly, the suction nozzle removed from the nozzle pallet is individually dried by the nozzle drying device. Thus, it is possible to appropriately dry the suction nozzle after cleaning.

A filter assembly (10) which is suitable for use in a fluid container (1) of a domestic appliance comprises a filter element (30) and a filter housing (40) for delimiting a portion (8) of a fluid container (1) in which a fluid retrieval pipe (4) is present and in which the filter element (30) is to be arranged, the filter housing (40) being adapted to let fluid into the delimited portion (8) of the fluid container (1) and to direct a fluid flow from an inlet position (41) to an inlet (5) of the fluid retrieval pipe (4) through the filter element (30), the filter element (30) being configured for at least partially enclosing the fluid retrieval pipe (4), and the filter element (30) having a filter medium and a semi-permeable skin for at least partially enclosing the filter medium.

The invention relates to a sewage pit (1, 60) for receiving and discharging waste material, particularly domestic, medical and/or industrial waste comprising liquid and solid constituents, to the sewer (52), the sewage pit comprising: —a housing (2, 3, 4) with a closable receiving space (9), wherein one or more of the walls of the housing is provided with at least one inlet (19) configured to carry the waste material into the receiving space, a flushing liquid feed (10) which is embodied to feed flushing liquid to the receiving space for bringing the waste material into suspension, and at least one outlet (29) which can be connected to the sewer and is configured to discharge the mixture of waste material and flushing liquid from the receiving space and to the sewer, —at least one pump (25, 26) connectable or connected to the one or more outlets which is configured to pump the mixture which has been brought into suspension from the receiving space and to discharge the mixture via the one or more outlets.

A dewatering device for removing entrained solids and debris from a liquid stream includes a housing defining a chamber. An auger has a first end positioned outside the chamber and a second end positioned inside the chamber. A compaction zone includes a first tube fixed to the housing. A second tube is slidably mounted on the first tube. A partition is secured to the second tube and has a first longitudinal position in the housing allowing a solids plug to form in the compaction zone and a second longitudinal position in the housing preventing the solids plug from forming in the compaction zone.

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 removable catch basin filter insert includes a filter container is fitted into a catch basin in the ground at the location where the stormwater exits the gutter and enters the stormwater sewer system. The removable catch basin filter provides pollution capture from stormwater while being easily cleaned. A hinged cover is included at the top of the filter insert to allow the captured pollutants to be evacuated through the use of a vehicle or being tipped nearly upside down by a mechanical arm. A hinged trap door is included at the bottom of the filter insert to allow captured pollutants to be evacuated through the bottom of the device and into a container. By capturing the pollutants with the removable catch basin filter insert before the pollutants enter the mainline storm drain system, clean storm drain systems are provided allowing for cleaner waterways.

An inlet filter and method of use are disclosed. In one aspect, the inlet filter comprises a frame, filter material, a feed stream inlet, and a filtrate outlet. The frame is configured so an exterior of the frame is shaped like a wedge. The frame comprises a thick portion and a narrow portion opposite the thick portion. The thick portion of the frame comprises the feed stream inlet. The filter material is positioned along a bottom surface of the frame and a portion of an upper surface of the frame that is opposite the feed stream inlet in the narrow portion of the frame. In another aspect, the method comprises inserting an inlet filter into a storm sewer inlet. The inlet filter can be one of a plurality of inlet filters inserted into the storm sewer inlet, the filters cooperating to filter a feed stream entering the storm sewer inlet.