A system and method for backwashing a sand filter in a wastewater treatment system. In one aspect, the invention can be a system for backwashing a sand filter comprising: a sand filter configured to remove solids from an untreated wastewater; a container storing chlorine fluidly coupled to the sand filter by a chlorine supply manifold; a flow control mechanism positioned on the chlorine supply manifold between the container and the sand filter, the flow control mechanism alterable between a first position whereby chlorine cannot flow from the container to the sand filter and a second position whereby chlorine flows from the container to the sand filter, the flow control mechanism being biased into the first position; and a processor operably coupled to the flow control mechanism and configured to automatically actuate the flow control mechanism into the second position upon detecting that the sand filter is being backwashed.

A water treatment device, preferably a device used for treating waters intended for a domestic and/or industrial use, includes a filtration apparatus and an ionization apparatus accommodated together in a container.

A liquid treatment device includes a body. The body includes a container section defining a container for holding liquid to be treated and a liquid treatment section defining a cavity and including at least one liquid treatment part. The body includes at least one liquid-impermeable wall defining at least a bottom of the container and at least one wall enclosing the cavity. These walls are inseparable, any seams in transitions between these walls being between parts of the body joined by bonding. The liquid treatment device is provided with at least one first liquid-permeable window allowing liquid to egress from the device and at least one second liquid-permeable window allowing liquid to flow from an interior of the container to the cavity. The liquid treatment device includes a barrier between the cavity and the container interior, inseparable from the body, the barrier including at least one of the second windows.

A process for treating water containing contaminants comprising the steps of: (a) contacting water to be treated with an inorganic oxidising salt containing manganese or iron for a time effective for oxidising a portion of said contaminants; (b) contacting water treated in oxidation step (a) with at least a chlorine containing agent for disinfection and to generate, in situ and through reaction with chemical compounds produced in pre-oxidation step (a), a coagulant for coagulating oxidised contaminants present in the water; (c) separating coagulated contaminants from the water; and (d) subjecting water to a catalytic oxidation for oxidising residual oxidisable contaminants, said catalytic oxidation being catalysed, in part, by manganese or iron species, depending on the residual selected oxidising salt left in solution in water after oxidation step (a). Permanganates are particularly advantageous inorganic oxidising salts and chlorine dioxide is a particularly preferred chlorine containing disinfecting agent for use in step (b). Apparatus for conducting the process is also disclosed.

There is described a water purifying apparatus comprising: (i) at least one water inlet; (ii) an ultra-violet (UVC) radiation chamber connected to the water inlet(s); (iii) a plurality of UVC light emitting diodes (UVC-LEDs) for the emission of UVC light into the radiation chamber; (iv) a control to operate UVC-LEDs in use, and (v) at least one UVC-LED aging monitor to provide feedback to the control.

An automated total organic carbon analyzer is described. Embodiments of the system include two features, namely the development of a selective oxidation reactor to oxidize organic contaminants to their corresponding organic acids, and the measurement of the organic acids individually by chain length using an electroanalytical detector. Combining this electroanalytical approach with sequential detection capabilities (such as spectrophotometry) can expand the instrument capabilities by providing organic contaminant speciation. The described reactor performs selective oxidation of organic carbon to organic acids followed by complexation with a proprietary ligand, then selective detection using electroanalytical accumulation and desorption of organic acids performed at an electrode surface.

A connecting mechanism (1) for a cartridge-type replaceable module (2) that has at least one fluid port (2a,2b) at each of opposite sides of the module (2) in a longitudinal direction of the module (2). The connecting mechanism (1) comprises two connector elements (3) spaced apart in the longitudinal direction of the module (2) and each provided with at least one fluid connector (3b) configured to releasably inter-engage with a complementary fluid port (2a,2b) of the module (2) at the respective side thereof, wherein at least one of the connector elements (3) is movable to perform a translational movement in the longitudinal direction of the module (2). The connecting mechanism (1) further comprises at least one driver element (4) arranged to engage with the module (2) and with the at least one movable connector element (3) such that a rotational or translational movement of the module (2) engaged with the driver element (4) causes the translational movement of the movable connector element (3) via the driver element (4) to establish/release the inter-engagement of the fluid connector(s) (3b) of that connector element (3) with the associated fluid port(s) (2a,2b) of the module (2).

A multiple-bore solute cartridge carrier 10) for use in a sterile fluid delivery system. The carrier includes a rotary housing (12) adapted for connection to the sterile fluid delivery system. The rotary housing has one or more bores (30) configured to receive a solute cartridge. The rotary housing, when connected to the sterile fluid delivery system, is selectively rotatable to facilitate creation of a desired sterile solution when sterile water from the fluid delivery system is flowed through the solute cartridge.

A modular filtration platform having at least one manifold head and at least one respective filter cartridge assembly. Each manifold head is connected to one another to establish a water flow in a series or parallel manner. Each filter cartridge assembly is releasably secured from rotation relative to the manifold head by a locking mechanism. An aperture on the filter cartridge assembly annular collar mates with a protruding resilient extension on either the manifold head or support bracket. Alternatively, an aperture on the filter cartridge assembly annular collar and an aperture on the manifold head annular collar mate with a protruding member from a locking ring extending through both apertures. An integrated sensor package may be integrated with the system for true managed water visible/audible indications and Wi-Fi interface to facilitate virtually instantaneous response times for filtration needs.

A point-of-use water filtration system having an idle mode and a filtration mode, the water filtration system including a feed water inlet, a pump in fluid communication with the feed water inlet via a feed water line, and a semi-permeable membrane having an upstream side and a downstream side. A first portion of the upstream side is in fluid communication with a membrane inlet and a second portion of the upstream side is in fluid communication with the concentrate outlet, and the downstream side is in fluid communication with a permeate outlet. The point-of-use water filtration system also includes a permeate line in fluid communication with the permeate outlet and a filtered water outlet, a concentrate line in fluid communication with the concentrate outlet, a flow path configured to selectively connect the permeate line to the feed water line; and a controller configured to anticipate demand for the filtration mode based on operator habit information stored in a memory of the controller when the water filtration system is in the idle mode and to recirculate water in the permeate line through the pump and the semi-permeable membrane in response to the anticipated demand for the filtration mode.