Abstract: A reactor and control method thereof to maximize nitrogen removal and minimize aeration requirement through control of transient anoxia and aerobic SRT, repression of NOB, and control of dynamic DO concentrations or aeration interval by keeping the reactor NH4 and NOx concentrations approximately equal has been proposed. Controls described in this invention maximizes the potential for TIN removal through nitrification, limited nitritation, nitritation, denitrification, limited denitritation, denitritation making use of 1) real time measurement of ammonia, nitrite, nitrate, 2) operational DO and the proper use of DO setpoints, and 3) proper implementation of transient anoxia within a wide range of reactor configurations and operating conditions.

Abstract: A fluid filter comprising a housing, a releasable cover and a replaceable filter having a filter body and two end plates. The filter is placed on a housing standpipe which has on its free side, facing the cover, an axially displaceable endpiece. The endpiece is preloaded in the expulsion direction and in that position is blocked by a locking system against insertion which prevents the cover from connecting with the housing. An unlocking device guided by the filter unlocks the locking system and allows insertion of the endpiece. The locking system is formed by locking tabs which are radially movable, and each have a locking face facing in the axial direction. The tabs are preloaded in the locking direction and each lock the endpiece in its expelled position against axial insertion relative to the standpipe. The tabs can be radially moved into their unlocking position by the unlocking device.

Abstract: The pressure sensor detects a pressure in the operation chamber when the first opening/closing valve is opened at a time of starting a replenishment of the chemical liquid into the chemical liquid pump. The flow rate sensor detects an exhaust flow rate exhausted from the operation chamber.

Abstract: A reverse osmosis membrane separation device includes: a reverse osmosis membrane module; a flow rate detecting unit configured to detect a flow rate of permeate water to output a detected flow rate value corresponding to the flow rate; a pressure pump configured to be driven at a rotation speed corresponding to an input drive frequency and to feed supply water to the reverse osmosis membrane module; an inverter configured to output a drive frequency corresponding to an input current value signal to the pressure pump; and a control unit configured to calculate a drive frequency of the pressure pump by a velocity type digital PID algorithm, such that a detected flow rate value output from the flow rate detecting unit becomes a target flow rate value that is set in advance to output a current value signal corresponding to a calculation value of the drive frequency to the inverter.

Abstract: A reactor and control method for maximizing nitrogen removal and minimizing aeration requirements through control of transient anoxia and aerobic SRT, repression of NOB, and control of dynamic DO concentrations or aeration interval by keeping the reactor NH4 and NOx concentrations approximately equal. Controls are provided for maximizing the potential for TIN removal through nitrification, limited nitritation, nitritation, denitrification, limited denitritation, denitritation making use of 1) real time measurement of ammonia, nitrite, nitrate, 2) operational DO and the proper use of DO setpoints, and 3) proper implementation of transient anoxia within a wide range of reactor configurations and operating conditions.

Abstract: A combined compact hot and ozonated cold water unit which comprises a framework that accommodates a hot water heater device, a ozone generator device and a combined temporary storage tank having both a hot water compartment and a separate cold water compartment. The hot water heater device is connected with the hot water compartment of the combined temporary storage tank for heating the water contained therein. The ozone generator device is connected with only the water compartment of the combined temporary storage tank for supplying ozone to the water contained therein.

Abstract: According to the present invention, a fluid and/or aqueous additive delivery system is provided. According to the present invention, a modular fluid container is described for consumption of liquids. Fluid containers according to the present invention include any combination of four distinct modular components; (1) an end-point filter purification module for removal of impurities from water, (2) a UV purification module for emitting ultraviolet (UV) light in a germicidal spectrum for disinfection, (3) a tablet storage and dispensing module to emit ultraviolet (UV) light in a germicidal spectrum for disinfection of a volume of drink liquid held in the container, (4) a flow meter module for quantitatively monitoring hydration in real time. The user can personalize the bottle with any or all modules that are required.

Abstract: Disclosed are an apparatus and a method for reducing a processing liquid consumed for removing bubbles from a new filter unit, and shortening a start-up time when the filter unit is attached in a processing liquid supply passage. The method includes: filling the processing liquid into a new filter unit, decompressing inside of the filter unit into a first pressure atmosphere in order to remove bubbles from the filter unit, boosting a pressure of the inside of the filter unit, flowing the processing liquid into the filter unit from a primary side of the filter unit, and supplying the processing liquid flowing from the filter unit to an object to be processed through a nozzle thereby performing a liquid processing and quickly removing the bubbles.

Abstract: The instant application describes methods of treating wastewater containing pathogenic microorganisms to reduce the concentration of those pathogenic microorganisms. The methods include measuring parameters or qualities of the wastewater, and using those parameters or qualities to determine the wastewater's ozone demand. The wastewater is dosed with ozone, with the dosage being less than the ozone demand. The ozone and wastewater are mixed with a static mixer, and the wastewater is oxidized by the ozone. Thereafter, the wastewater is disinfected via ultraviolet radiation treatment. The instant application further relates to a wastewater treatment system. The system includes an ozone reactor with a static mixer, an ozone supply device, at least one sensor, and an ultraviolet radiation disinfection unit. The ultraviolet radiation disinfection unit is located downstream from the ozone reactor.

Abstract: A water filter assembly is provided. The water filter assembly includes a casing that is selectively mounted to a manifold. A filtering media is positioned within the casing for filtering a flow of water through the casing. The water filter assembly also includes features for hindering spilling of water during changing of the filtering media.

Abstract: A method of filtering a fluid, including flowing a fluid from a first side of a filter member to a second side of the filter member, the fluid containing dissolved impurities. In addition, the method includes inducing fluid cavitation within the fluid to precipitate out at least a portion of the dissolved impurities. Further, the method includes controlling a pressure differential across the filter member. Still further, the method includes, maintaining or further inducing the fluid cavitation within the fluid in response to controlling the pressure differential. Related systems are also disclosed.

Abstract: The present invention is directed to an assembly and a method of treating rainwater to produce potable water. A compact and easy-to-install apparatus is achievable as a result of a simple, yet highly effective sanitization method. Rainwater is entrained with a gas, and the entrained rainwater is irradiated with an ultraviolet (UV) light to fully sanitize the rainwater. The UV light is used during the irradiation of the entrained water and is also used to form a gaseous bactericide which is used to entrain the rainwater. None of the disadvantages of the prior art systems apply to any rainwater treatment systems which use this method. All of the connections between the component parts may be already provided for in this rainwater treatment unit, and consequently both installation and maintenance costs will be significantly reduced in comparison to the rainwater treatment systems which are known from the prior art.

Abstract: A sample manager of a liquid chromatography system implements a thermal system that uses a dual-loop feedback control system to control temperature within a thermal chamber. The sample manager includes an external heatsink disposed externally to the thermal chamber, an internal heatsink disposed within the thermal chamber, and one or more thermoelectric devices thermally coupled to the external and internal heatsinks to transfer heat therebetween in response to a pulse-width modulated power signal. A first temperature sensor disposed within the thermal chamber continuously measures a chamber temperature. A second temperature sensor coupled to the internal heatsink within the thermal chamber continuously measures temperature at the internal heatsink. A feedback control system controls a duty cycle of the pulse-width modulated power signal in response to a target chamber temperature and real-time temperature measurements produced by the first and second temperature sensors.

Abstract: Several methods and devices are provided herein to generate shock waves that are used in the oil industry for well drilling, hydrocarbon or gas exploitation, fracking process or improved oil recovery (IOR), enhanced oil recovery (EOR), cleaning of process waters, oil spills byproducts and oil pipes, which can be used as independent systems or as auxiliary systems concomitantly with other existing technologies. The different devices consist of generating shock waves utilizing either one or more laser sources, or a self-generated combustible gas supply, or a micro-explosive pellet, or piezocrystals, or a piezofiber composite structure.

Abstract: A filtration device with filters that can be backwashed with purified water switches between water purification, first backwashing, and second backwashing modes, depending on a pivot position of a valve. During the first backwashing mode, while a tap water inlet is in communication with a second tap water passage port, first and second purified water passage ports are blocked from communication with a purified water outlet, so purified water from a second filter flows backward through a first filter and is discharged from a drain water outlet. During the second backwashing mode, while the tap water inlet is in communication with a first tap water passage port, first and second purified water passage ports are blocked from communication with the purified water outlet, so purified water from the first filter flows backward through the second filter and is discharged from the drain water outlet.

Abstract: A system for monitoring water chemistry of a recreational water installation includes a sensor configured to detect bather load in the recreational water installation and a controller configured to determine a required adjustment to the water chemistry of the recreational water installation based upon the detected bather load.

Abstract: Disclosed herein are a ballast water treatment system having a back-pressure formation unit and a control method thereof. Back pressure in a filtering unit is checked and formed during a back washing operation for a filter of a filtering unit, thus enabling efficient back washing operation. Both a method of physically filtering ballast water using the filter and a method of sterilizing ballast water using ultraviolet rays are used to treat ballast water, thus preventing secondary contamination due to byproducts, and preventing the contamination of a ballast tank. A flow rate of ballast water introduced into an ultraviolet treatment unit is controlled such that the efficiency of the ultraviolet treatment unit is not reduced, while back pressure is formed in the filtering unit, thus increasing the overall treatment efficiency of the ballast water treatment system. Further, the filtering unit or the ultraviolet treatment unit may be automatically washed.

Abstract: Ballast and/or cooling water biocidal treatment and disinfection systems and techniques are provided. The systems utilize oxidation reduction potential control to regulate addition, or concentration of an electrocatalytically generated biocidal agent to disinfection levels in ship buoyancy and to biofouling levels in ship cooling water systems. The disinfection and biofouling control systems provide suitable treatment while reducing the potential for corrosion of ship components and, in some cases, undesirable disinfection byproducts.