Abstract: Disclosed is a double-water-output cylindrical integrated water purifier. A clean water flow channel, a pure water branch flow channel and a waste water bypass flow channel are further provided in the base, and a clean water outlet in communication with the clean water flow channel is provided at a side of the base; the pure water flow channel is communicated with the clean water flow channel via the pure water branch flow channel, and a second check valve for controlling water to flow into the clean water flow channel unidirectionally is disposed in the pure water branch flow channel; the waste water outlet end face is further communicated with the clean water flow channel via the waste water bypass flow channel, and a third check valve for controlling water to flow into the clean water flow channel unidirectionally is disposed in the waste water bypass flow channel.

Abstract: Methods are described for monitoring biofouling in a closed water system. For example, a method includes adding nitrate to water circulating in the closed water system, and detecting whether nitrite is present in the water after adding the nitrate. Another method includes introducing chlorite into water circulating in the closed water system, the detecting the amount of chlorite present in the water; and at least one of (i) comparing the detected amount of chlorite to an expected amount of chlorite; and (ii) observing whether the amount of chlorite in the water decreases over time.

Abstract: A device for generating a disinfectant solution based on metal and water atoms, including at least one sealable enclosure, where at least one electrode is installed. The sealable enclosure further includes an inlet and an outlet. The device also includes an energy source that may be in contact with the fluid, or may be insulated from the fluid. Thus, the energy source may be made available inside the sealable enclosure or on the outside the sealable enclosure, or both. The device enables the rapid production of a disinfectant solution based on a mixture of fluid such as water and biocidal metal atoms such as silver atoms with increased antibacterial, virucidal and fungicidal properties.

Abstract: Systems and methods for generating and using a water filtration media containing date seed powder are provided. The method of generating the date seed powder for use in a water treatment system includes drying the date seeds, cleaning and removing the date seed envelopes, grinding the date seeds, and segregating the date seed powder according to a predetermined particle size. The method of using the date seed powder to treat water includes using a treatment tank with a date seed media bed layer, introducing water, and filtering suspended solids from the water stream using the date seed media bed layer. The system utilizing the date seed media bed layer includes a treatment tank, a date seed media bed layer, water inlets and outlets, backwashing equipment, and media support screens.

Abstract: A method of removing a contaminant from water may include contacting contaminated water, including a heavy metal and/or an organic pollutant, with a nanocomposite including graphitic C3N4, MnO2, and MgAl2O4 in a mass relationship to each other in a range of from 5 to 15:2 to 7:75 to 95, thereby adsorbing the heavy metal and/or the organic pollutant onto the nanocomposite, as an adsorbed material. The method may further include removing the adsorbed material from the contaminated water, thereby reducing a concentration of the heavy metal in the contaminated water by at least 2 percent by weight (wt. %), the heavy metal may include Cd, Cr, Cu, Fe, Pb, Ni, Ag, Zn, and/or U, and the organic pollutant may include a dye.

Abstract: An apparatus for roll-to-roll nanomaterial dispersion papermaking includes a suction pressure for consolidating nanomaterials on a fluid permeable filter in one region of the filter and an opposite pressure region or regions for separating a mat of the consolidated nanomaterials and transferring the mat to a transfer roller. A transfer roller may have a suction pressure within the transfer roller to help transfer the mat from the filter to the transfer roller, for example. An inlet port distributes nanomaterials using row and zone inlets, for example.

Abstract: An underdrain configured to be placed at the bottom of a wastewater container having media disposed therein wherein the present invention provides equally distributed flow over the entire filter bed. The present invention includes a base member having a planar bottom member with opposing lateral longitudinal leg members. A baffle member is operably coupled to the base member and superposed thereto. The baffle member is formed from four contiguous portions with the inner portions having an obtuse angle therebetween. The outer portions have an acute angle with the inner portion contiguous therewith. A top member is superposed the baffle member and has a plurality of apertures facilitating air scouring of the underdrain. A screen member is operably disposed over the baffle member and top member being arcuate in shape having lateral edges operably coupled with the base member. The screen member is manufactured from wedge wire screen material.

Abstract: The invention is in the field of organic sludge digestion from various sources, such as manure, sludge from a wastewater treatment plant, and an organic fraction of dredging sludge. The present method provides advanced control for serially treating aqueous organic sludge by anaerobic digestion. It further relates to dewatering of the obtained biomass.

Abstract: A water filtration system is also disclosed. The water filtration system includes a regenerative media filter vessel, a filtrate line, a feed line, a recirculation line, a gas line, and at least one pump. A method of filtering water in a system comprising a regenerative media filter is disclosed. The method includes operating the system in a filtration mode, operating the system in a cleaning mode responsive to a differential pressure measurement across the regenerative media filter, operating the system in an aeration mode, operating the system in a pre-filtration mode after operating the system in the cleaning mode, operating the system in a drain mode, and operating the system in the filtration mode following the drain mode. A controller and non-transitory computer-readable medium having computer-readable signals stored thereon that define instructions that, as a result of being executed by the controller, instruct the controller to perform a method of operating a water filtration system are disclosed.

Abstract: A filtration device includes: a housing that defines a liquid flow path; and a filtration sheet that separates the liquid flow path into a flow path upstream side and a flow path downstream side. The housing includes: a first housing member and a second housing member that sandwich the filtration sheet, and a joining member that joins the first housing member and the second housing member in a state in which the filtration sheet is sandwiched between the first housing member and the second housing member. A gap is located between the first housing member and the second housing at a position outward of an outer edge of the filtration sheet. The joining member seals the gap between the first housing member and the second housing member at the position outward of the outer edge of the filtration sheet.

Abstract: A method of oxidizing a component of an aqueous medium is provided. The method includes adding an effective amount of an oxidizing composition to the aqueous medium. The oxidizing composition includes an ingredient, such as hydrogen peroxide, a percarbonate salt, a peroxy compound, a chlorite or alkali metal salt thereof, a chlorate or alkali metal salt thereof, or any combination thereof. The method also includes oxidizing the component. The component may be a metal, a mineral, a microbial metabolite, an organic molecule, or combination thereof. The method also includes modulating the application of the oxidizing composition based on a measured aqueous medium parameter.

Abstract: A water treatment system has a water treatment tank that stores a resin bed, a conductivity monitor, a valve assembly, a flow meter, and a controller. The control valve assembly is switchable to selectively permit untreated water flow into the tank, treated water flow out of the tank, and regenerant flow into and out of the tank. In one configuration, the conductivity monitor includes at least an uppermost probe located within 6? of the nominal mid-point of the resin bed and a second probe located half-way between the first probe and the bottom of the resin bed. Signals from these probes are used in combination with flow data as measured by the flow meter to provide precise information regarding volumetric capacity as depletion is registered at each probe. Also disclosed are an improved technique for sampling data from the conductivity monitor, and a wireless conductivity monitor.

Abstract: A plasma activated water production system includes a plasma reactor and a membrane concentrator. The plasma reactor includes an internal cavity, at least one electrically-conductive inlet capillary and outlet capillary. A mixing chamber has a feed gas inlet, a liquid inlet, and a mixed gas and liquid outlet. A power source is provided. The plasma reactor propagates a plasma discharge between the inlet capillary and the outlet capillary. A membrane concentrator includes a water flow channel with a water inlet and a water outlet, a dry gas inlet and a humidified gas outlet. An ion selective membrane is provided, and water will pass through the membrane into the dry gas, and the water leaving the membrane concentrator will have increased concentrations of nitrates, nitrites and hydrogen peroxide. An electrodialysis embodiment and a method of generating plasma activated with increased concentration of nitrates, nitrites and hydrogen peroxide are also disclosed.

Abstract: Provided are a chemical decontamination method and a chemical decontamination apparatus capable of preventing deterioration of a metal ion exchange resin and performing decontamination at a low cost in a short time. The chemical decontamination method of the invention includes: a reduction decontamination step of supplying a reduction decontamination solution to a decontamination target portion and performing reduction decontamination on a surface of a member constituting the decontamination target portion; a hydrogen peroxide decomposition step of decomposing hydrogen peroxide contained in the reduction decontamination solution after the reduction decontamination step; and a metal ion removing step of removing a metal ion contained in the reduction decontamination solution after the hydrogen peroxide decomposition step.

Abstract: A two-stage treatment process for destroying per- and polyfluoroalkyl substances (PFAS) in an aqueous stream. The two-stage treatment process uses a combination of multifunctional crystalline molecular sieves, such as zeolites and zeotypes, to separate PFAS from the aqueous stream, catalytically decompose and defluorinate any PFAS molecules, and generate non-toxic waste products that are safe for disposal. The first stage includes adsorption of the PFAS within one of a pair of vessels containing porous, hydrophobic, hydrothermally stable molecular sieves, dehydration of the captured PFAS on the sieves, and catalytic ozonation of the captured PFAS molecules on the dried sieves. The second stage involves catalytic decomposition and neutralization of the ozonation results with one of a pair of vessels including a zeolite-supported CaO catalyst, catalytic oxidation of any toxic CO generated by the decomposition, and an acid wash for regeneration of the spent catalyst.

Abstract: A water filter medium container includes a removable upper cover and a removable lower cover. The container includes a tube defining a filter medium compartment operative to receive a replaceable filter medium. A first containment element may be placed between the upper cover and the tube. A second containment element may be placed between the lower cover and the tube. The water filter medium container may be adapted to be placed in a water container.

Abstract: The invention relates to a method for manufacturing a concentrate enriched in iron mineral content from an ore, which contains an iron mineral and silicate, by reverse flotation, which method comprises the step of (c) adding a compound of formula I wherein R1 is C9-C22 alkyl or alkenyl, which is linear or branched, R2 is H, C1-C4 alkyl, which is linear or branched, R3 is —X—NH2, H or C1-C4 alkyl, which is linear or branched, and X is C2-C4 alkylene, which is linear or branched, or a salt of a protonated compound of formula I and an anion, to a prepared aqueous pulp of the ore and optionally one or more flotation auxiliaries to obtain an aqueous mixture. Furthermore, a method for manufacturing a specific group of compounds of formula I, i.e. compounds of formula 1-X wherein R1 is C9-C15 alkyl, which is linear or branched, R2 is H, R3 is —X—NH2 and X is C2-C4 alkylene, which is linear or branched, is disclosed.

Abstract: The highway sponge-type composite side ditch carbon neutralization system of the present invention includes three units, i.e., a silt pre-sedimentation channel, a filtering and oil-absorbing channel and an ecologic purification channel which are connected horizontally and successively. These three units work together to jointly complete the low-impact development functions of runoff collection, guide and drainage, purification and utilization, carbon emission is reduced by adopting various technical measures, the carbon sink effect is improved, and the full-life-cycle carbon neutralization effect from raw material production, construction to operation can be realized.

Abstract: A filtration system including a housing defining an internal volume. The housing includes a housing first end, a housing second end, and a first coupling member formed in the housing. The housing first end is an open end. The housing second end is a closed end. A filter element is positioned within the internal volume of the housing. The filter element is configured to engage the first coupling member. A filter head is provided. A seal member is disposed between the housing first end and the housing second end. The seal member provides a radial seal directly between the housing and the filter head.

Abstract: A filter for a water-purification device includes a filter housing having a water inlet and a water outlet defined therein, and a filter member disposed in the filter housing to purify water introduced through the inlet and supply the purified water to the outlet. The filter member includes a carbon block produced by mixing 40 to 50% by weight of titanium oxide, 30 to 40% by weight of activated carbon, and 18 to 23% by weight of binder with each other.