The invention relates to a method for the treatment of wastewater in a biological treatment reactor, comprising the steps of (a) introducing wastewater influent at the bottom part of the reactor while simultaneously decanting treated wastewater effluent at the operational water level in the top part of the reactor, (b) an aeration step and (c) a settling step wherein the biomass is allowed to settle; wherein step (a) is performed under vertical plug flow conditions, wherein during step (a) the equal distribution of the influent wastewater across the distributor pipes and/or the degree of plug-flow in the reactor is monitored, and when a suboptimal distribution or a suboptimal degree of plug-flow is detected the influent distributor system and/or effluent decanter system is cleaned by removing fouling and/or blockage.

The invention also relates to a liquid influent system and to an installation for the use in such method for the treatment of wastewater.

Distribution pipe for conducting ultrapure water from ultrapure water production facility to cleaning apparatus treatment unit provided on distribution pipe, distribution pipe for conducting ultrapure water to cleaning apparatus branches from distribution pipe between ultrapure water production facility and treatment unit, water amount controller provided in a first branch portion where distribution pipe branches from distribution pipe, water amount controller for controlling the ultrapure water supplied from distribution pipe to cleaning apparatus comparator for comparing a first amount of impurities contained in the ultrapure water treated by treatment unit with a second amount of impurities contained in the non-treated ultrapure water by treatment unit and flow path controller for controlling water amount controllers based on the results of the comparison.

A portable filtration system is described. The system may comprise: a mixing portion, comprising: a pump adaptor and a contaminant regulator. The pump adaptor may comprise: an upper plate, a lower plate, and a screen. The screen may axially extend between the upper and lower plates, wherein the upper plate, the lower plate, and the screen define a channel of a mixing chamber. The contaminant regulator may comprise a through-passage coupled to the upper plate, wherein the through-passage is in fluid communication with the mixing chamber.

Oxidation of per- and polyfluoroalkyl compounds (PFAS) contaminated solids and liquids in an in-situ desired zone of treatment using high redox potential free-radicals. An oxidant and a metal catalyst are combined forming a low temperature thermal remediation of PFAS through chemical oxidation in-situ.

Provided are an ozone water decomposition apparatus and method that can decompose ozone water quickly and stably. The ozone water decomposition apparatus, comprising: a tank configured to accommodate ozone water and decompose the ozone water; a first supply unit configured to supply the ozone water to the tank; a second supply unit configured to supply an additive to the tank wherein the additive is supplied by a preset first or second supply amount; a circulation line configured to circulate the ozone water in the tank; and a concentration meter installed in the circulation line, wherein the ozone water decomposition apparatus comprises: after circulating the ozone water using the circulation line, measuring an ozone concentration of the ozone water using the concentration meter; subsequently supplying the additive of the first supply amount or the second supply amount based on the measured ozone concentration of the ozone water; and subsequently circulating the ozone water until the ozone concentration of the ozone water reaches a preset reference concentration.

A method of determining a disinfectant composition of a municipal water supply from a water sample that includes: (a) obtaining a water sample from a water source at a sampling location; (b) adding a chlorine-containing material to the water sample in the presence of an oxidation reduction potential (ORP) measurement device; (c) generating a plurality of ORP measurements during addition of the chlorine-containing material to the water sample; (d) estimating a concentration of one or more of free ammonia, fully combined ammonia, monochloramine, or a mixture of dichloroamine and trichloroamine in the water sample in which the estimation is derived from the relationship between the added chlorine material and the plurality of ORP measurements; and (e) determining a disinfectant composition of the water source at the water sampling location from the concentration calculation. A method of determining free ammonia composition is also included.

The described systems and methods relate to systems for providing a cleaning solution comprising electrolyzed water. While the cleaning systems can comprise any suitable component, in some cases, they include an electrolytic cell and at least one fluid conditioning system that includes a first conduit and a second conduit that are coupled together and are non-concentric with each other. While the fluid conditioning system can be disposed in any suitable location with respect to the cell, in some cases, the fluid condition system is disposed upstream of the cell to provide fluid that passes through the first and second conduits into the cell. In some cases, the fluid conditioning system is disposed downstream of the cell to receive an electrolyzed water produced by the cell. In some cases, the fluid conditioning system is configured to recirculate electrolyzed oxidizing water through an anode compartment of the cell. Other implementations are described.

Materials for binding per- and polyfluoroalkyl substances (PFAS) are disclosed. A fluidic device comprising the materials for detection and quantification of PFAS in a sample is disclosed. The fluidic device may be configured for multiplexed analyses. Also disclosed are methods for sorbing and remediating PFAS in a sample. The sample may be groundwater containing, or suspected of containing, one or more PFAS.

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.

A mobile processing system is disclosed for the removal of radioactive contaminants from nuclear process wastewater. The system is fully scalable, modular, and portable allowing the system to be fully customizable according to site-specific remediation requirements. It is designed to be both transported and operated from standard sized intermodal containers or custom designed enclosures for increased mobility between sites and on-site, further increasing the speed and ease with which the system may be deployed. Additionally, the system is completely modular wherein the various modules perform different forms or stages of wastewater remediation and may be connected in parallel and/or in series. Depending on the needs of the site, one or more different processes may be used. In some embodiments, one or more of the same modules may be used in the same operation.