Portable water conditioning systems include a water conditioner having a plurality of conditioning stages including, in a direction of flow of the water through the water conditioner, a reverse osmosis stage having a reverse osmosis membrane, and a deionizing stage. A first sensor is configured to detect a first condition of the water before the reverse osmosis stage and a second sensor configured to detect a second condition of the water after the reverse osmosis stage. The conditions each include (i) a level of total dissolved solids of the water and (ii) temperature of the water. A controller is in communication with the sensors and configured to determine of a percent of dissolved solids that are rejected by the reverse osmosis membrane based on the conditions when backpressure on the reverse osmosis stage is at a known state.

In the field of wastewater or effluent treatment, a method for treating wastewater includes a first step of treating carbon contained in the wastewater by means of oxygen, a second step of treating the nitrogen contained in the treated water at the end of the first step, a third step of determining a ratio between a concentration of carbon and a concentration of nitrogen in the water at the end of the first step, a fourth step of controlling the supply of oxygen necessary for the first step as a function of a difference between the determination carried out in the third step and a strictly positive setpoint of concentration ratio. A device implementing the method is also provided.

The present invention relates to systems and methods for cleaning materials, such as flooring and upholstery. In some cases, the systems and methods use an electrolytic cell to electrolyze a solution comprising sodium carbonate, sodium bicarbonate, sodium acetate, sodium percarbonate, potassium carbonate, potassium bicarbonate, and/or any other suitable chemical to generate electrolyzed alkaline water and/or electrolyzed oxidizing water. In some cases, the cell comprises a recirculation loop that recirculates anolyte through an anode compartment of the cell. In some cases, the cell further comprises a sensor and a processor, where the processor is configured to automatically change an operation of the cell, based on a reading from the sensor. In some cases, a fluid flows past a magnet before entering the cell. In some additional cases, fluid from the cell is conditioned by being split into multiple conduits that run in proximity to each other. Additional implementations are described.

An organic wastewater treatment apparatus is operated by switching between a first operation mode and a second operation mode. The first operation mode includes supplying organic wastewater to a dual-use tank and performing an anaerobic treatment process therein, performing a nitrification-denitrification process in a membrane bioreactor treatment tank, and extracting membrane-permeated water from a membrane separation device arranged in the membrane bioreactor treatment tank as treated water. The second operation mode includes supplying the organic wastewater to the dual-use tank and performing an aerobic treatment process therein, supplying mixed liquid containing activated sludge from the dual-use tank to both of the membrane bioreactor treatment tank and a sedimentation tank, performing a nitrification-denitrification process in the membrane bioreactor treatment tank, extracting membrane-permeated water from the membrane separation device arranged in the membrane bioreactor treatment tank as treated water, and also extracting solid-liquid separated liquid from the sedimentation tank as treated water.

Methods of treating CMP wastewater comprising azoles are disclosed. The method includes providing the wastewater having a first azole concentration, introducing the wastewater to an inlet of a wastewater treatment system constructed and arranged to produce and introduce free radicals into the wastewater, and activating the wastewater treatment system to produce and introduce the free radicals into the wastewater in an amount sufficient to reduce the azole concentration in the wastewater and produce treated water having a second azole concentration, less than the first azole concentration. Methods of facilitating treatment of CMP wastewater comprising azoles by providing a water treatment system constructed and arranged to produce and introduce free radicals into the wastewater are disclosed.

A water treatment apparatus includes a water receiver configured to receive an input of water; and an installation mechanism configured to include one or more slots in which a module for water treatment is installable. Among a plurality of types of modules available to be selected in accordance with a use of water treatment, at least one module includes a filter as a component, and the water treatment apparatus is configured to provide a water treatment function corresponding to the module to the water received at the water receiver by installing the module in one of the one or more slots.

A biofilter irrigation system comprises a cylindrical vessel having a central axis, a media bed positioned within the vessel, a spray head system positioned above the media bed, the spray head system comprising a central hub positioned at the central axis of the vessel, at least one arm extending distally from the central hub toward a wall of the vessel and configured to rotate about the central axis, and a plurality of nozzles connected to the at least one arm. The biofilter irrigation system further comprises a fluid outlet positioned below the media bed.

Metal working fluid decontamination apparatus (10) includes: an intake arrangement (40) for metal working fluid (42); a pump (16) for providing, in use, flow pressure to the metal working fluid (42); a decontaminator (50) for reducing contamination in the metal working fluid (42); and an outlet arrangement (34) for the metal working fluid. The metal working fluid (42) is a fully synthetic metal working fluid, which comprises water and a water soluble synthetic concentrate which does not comprise oil.

Methods and systems are described for monitoring and managing fluid treatment or storage systems, such as HVAC hydronic water systems. Sensors located at a fluid system can detect various types of data, such as chemical amounts, pressures, temperatures, flow rates, and more. Servers in communication with the sensors can record the data and provide it to a user in a variety of graphical interfaces. One useful interface for display of the data includes a five-sided axis called the OPTI-GON.

A method of inhibiting carbonate scale in an industrial water system includes the steps of dosing the industrial water system with a water treatment polymer comprising at least 60 mol % of carboxylic acid monomer and a quaternized naphthalimide fluorescent monomer as disclosed herein, and then monitoring the fluorescence of the water system. If both maleic acid and phosphino moieties are included in the water treatment polymer, then the maleic acid is present as no greater than 70 mol % of the water treatment polymer. If the polymer contains a sulfonic acid monomer, the polymer is a fluorescence efficient polymer.