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 wastewater recycling system includes a biological reactor having anaerobic, anoxic, and aerobic chambers. A lift station including a pump is operatively connected to the biological reactor. The lift station receives biologically treated liquid from the biological reactor and pumps the liquid from the lift station. A filtration subsystem is operatively connected to the lift station. The filtration subsystem receives and filters the liquid pumped by the lift station. The filtration subsystem includes a salt-rejecting membrane filter comprising a concentrate recirculation conduit operatively connected to recirculate salt-rejecting membrane filter concentrate to a point along the wastewater recycling system upstream of the salt-rejecting membrane filter, thereby forming a salt concentration loop between said point along the wastewater recycling system and the salt-rejecting membrane filter. A post-filtration subsystem is operatively connected to receive salt-rejecting membrane filter permeate, and comprises a water disinfection system that disinfects the permeate thereby generating potable water.

Energy-efficient separation of particulates from fluids is based on determining particulate mass removal as a function of applied energy. Energy-efficient ultrasonic field powers and exposure durations are applied to a particulate containing fluid, and particles removed. In some cases, ultrasonic exposures are selected that provide the maximum particulate removal per applied energy.

The present invention provides a continuous mobile monitoring unit of a flow of cooling water comprising means to extract a flow of cooling water, means to analyze a plurality of parameters of the cooling water by means of diverse analytical techniques, generating results relating to each one of the parameters analyzed, and means to return the flow of cooling water to the cooling system (1). In addition, the invention furthermore provides a method of continuous monitoring of the flow of cooling water comprising the stages of: extracting a flow of cooling water, analyzing a plurality of parameters of the cooling water by means of diverse analytical techniques, generating results relating to each one of the parameters analyzed, and returning the cooling water to the cooling system (1).

This invention is directed to a method, system and apparatus for the treatment fluids. An apparatus for the treatment of a fluid comprises a fluid chamber and at least one ultraviolet light unit arranged at a periphery of the fluid chamber. The at least one ultraviolet light unit comprises at least one ultraviolet light emitting diode and an ultraviolet light directing element. The ultraviolet light directing element is configured to collimate at least a portion of the light emitted from the at least one ultraviolet light emitting diode in use such that the ultraviolet light rays emitted from each ultraviolet light unit are parallel in a first plane. Also described is a method for the cooling a light emitting diode in a fluid treatment system.

A method of treating aqueous, preferably concentrated, waste streams with a unique combination of steps in a way that is easily scalable and able to be used with batch or continuous flows. The method comprises at least the following steps: Adding at least one precipitating agent to the waste water to produce precipitated solids; and removing the precipitated solids from the waste water using a forward flushable membrane to remove the precipitate solids.

The present technology relates to control systems for use with fluid treatment systems. In one embodiment, for example, a fluid treatment system includes a vessel configured to receive a fluid having one or more constituents and to separate one or more constituents from the fluid. The system can also include a tube extending along at least a portion of the vessel and a sensor. The tube can be in fluid communication with a pressurized air source, and the sensor can be configured to obtain a measurement of an operating parameter. The system can also include a controller in communication with the sensor and pressurized air source. The controller can execute one or more algorithms to determine a filter parameter based on the measurement of the operating parameter, compare the filter parameter to a threshold, and, based on the comparison, activate or deactivate the pressurized air source.

Systems and methods can support an autonomous pool skimming system. The pool skimming system may have a body with two or more hulls. Two or more paddlewheels may be coupled to the body. An independent motor may drive each paddlewheel. The motors may be independently controllable to support steering. The pool skimming system may have one or more processing units, two or more distance sensors, one or more solar cells, and a power supply operable to power the processing units and the motors from energy supplied by the solar cells. One or more processing modules may configure the processing units to plan and execute a traversal path across the surface of a body of water, such as a swimming pool, to collect debris into a removable basket. A portion of the traversal path may be established according to signals from distance sensors.

The present invention relates to a method for production of potable water by removal from water of an aqueous environment selected from a river, a lake, a reservoir, a pond, a stream, groundwater, spring water, surface water, or combinations thereof, organic colloidal particles of biocontaminants. The method comprises applying to the water at least one nanocomposite consisting of a mineral platform, which is denser than water, and at least one polyelectrolyte polymer adsorbed to said mineral platform with charge opposite to the charge of the colloidal particles.

The present invention relates to a multistage fiber filtering apparatus capable of selectively filtering depending on turbidity of raw water, in which a first filtration mode where the raw water passes through a fiber ball medium, a second filtration mode where the raw water passes through a fiber yarn medium, or a third filtration mode where the raw water passes through both of the fiber yarn medium and the fiber ball medium may be selectively operated.