Provided is a water purifier that includes a filtering unit for producing purified water by filtering influent water; a TDS measuring unit for measuring the total dissolved solids (TDS) in the water flowing into the filtering unit; a purified water passage through which the purified water is discharged; a concentrated water passage through which concentrated water, filtered by the filtering unit, is discharged; a concentrated water flow control valve for controlling the flow rate of the concentrated water discharged through the concentrated water passage; and a control unit for adjusting the degree of opening and closing of the concentrated water control valve, on the basis of the TDS and the pressure of the water flowing into the filtering unit.

Provided is a water purifier that includes a filtering unit for producing purified water by filtering influent water; a TDS measuring unit for measuring the total dissolved solids (TDS) in the water flowing into the filtering unit; a purified water passage through which the purified water is discharged; a concentrated water passage through which concentrated water, filtered by the filtering unit, is discharged; a concentrated water flow control valve for controlling the flow rate of the concentrated water discharged through the concentrated water passage; and a control unit for adjusting the degree of opening and closing of the concentrated water control valve, on the basis of the TDS and the pressure of the water flowing into the filtering unit.

An embodiment provides a method for determining a filter life, including: introducing an aqueous sample into a filtration device comprising at least one filter and one or more sensors located upstream of the at least one filter, wherein the one or more sensors are capable of measuring a component of the aqueous sample; measuring the component of the aqueous sample using the one or more sensors; identifying a load on the at least one filter based upon the measuring of the component of the aqueous sample and at least one filtration characteristic; and determining the filter life of the at least one filter based upon the identifying. Other aspects are described and claimed.

An embodiment provides a method for determining a filter life, including: introducing an aqueous sample into a filtration device comprising at least one filter and one or more sensors located upstream of the at least one filter, wherein the one or more sensors are capable of measuring a component of the aqueous sample; measuring the component of the aqueous sample using the one or more sensors; identifying a load on the at least one filter based upon the measuring of the component of the aqueous sample and at least one filtration characteristic; and determining the filter life of the at least one filter based upon the identifying. Other aspects are described and claimed.

The present disclosure relates to a biocide generating system for inhibiting bio-fouling within a water system of a watercraft. The water system is configured to draw water from a body of water on which the watercraft is supported. The biocide generating system includes an electrode arrangement adapted to be incorporated as part of an electrolytic cell through which the water of the water system flows. The water system is configured such that biocide treated water also flows to one or more components of the water system that are positioned upstream of the electrode arrangement.

A method and apparatus are provided for controlling a fuel delivery system to limit acidic corrosion. An exemplary control system includes a controller, at least one monitor, an output, and a remediation system. The monitor of the control system may collect and analyze data indicative of a corrosive environment in the fuel delivery system. The output of the control system may automatically warn an operator of the fueling station of the corrosive environment so that the operator can take preventative or corrective action. The remediation system of the control system may take at least one corrective action to remediate the corrosive environment in the fuel delivery system. One or more sensors may be employed to signal proper operation of the remediation system.

A fuel filter monitoring method includes receiving pressure signals that are indicative of a pressure drop across at least one fuel filter of a fuel supply system configured to supply fuel to at least one fuel injector of an internal combustion engine and receiving a condition signal indicative of a condition of a fuel supply system, the condition signal being generated by one or more of a geographic location sensor, an altitude sensor, and/or a fuel temperature sensor. The method includes estimating a remaining life of at least one fuel filter of the fuel supply system based on the pressure signal and the condition signal and outputting a notification indicative of the estimated remaining life.

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 separation of particulates from liquids by filtration for the purpose of removal or recovery of the particulates. Reducing the surfaces forces associated with electrostatic attraction between the particles and the filter medium is accomplished by modifying or coating the surface of the filter medium with one or more materials that exhibit a surface charge closer to or the same as that of the particulates in a given aqueous liquid. This permits filtration by mechanical interception but reduces the subsequent adhesion that prevents or hinders regeneration. The method and apparatus can be used in the filtration of radioactive particulates and contaminants from aqueous liquid inventories or liquid process streams with radiation resistant filter medium such as ceramics, sintered metal powders, or sintered metal fibers. These types of filters can exhibit a surface charge very different from that of the particulates targeted for separation by mechanical filtration.

A method and apparatus for separation of particulates from liquids by filtration for the purpose of removal or recovery of the particulates. Reducing the surfaces forces associated with electrostatic attraction between the particles and the filter medium is accomplished by modifying or coating the surface of the filter medium with one or more materials that exhibit a surface charge closer to or the same as that of the particulates in a given aqueous liquid. This permits filtration by mechanical interception but reduces the subsequent adhesion that prevents or hinders regeneration. The method and apparatus can be used in the filtration of radioactive particulates and contaminants from aqueous liquid inventories or liquid process streams with radiation resistant filter medium such as ceramics, sintered metal powders, or sintered metal fibers. These types of filters can exhibit a surface charge very different from that of the particulates targeted for separation by mechanical filtration.