Disclosed herein is a method of treating an aqueous solution containing impurities including a perfluoroalkyl substance and/or a polyfluoroalkyl substance, comprising introducing the aqueous solution into a batch or semi-batch photocatalytic reactor with a microparticulate catalyst configured to reduce chain length of the perfluoroalkyl substance and/or polyfluoroalkyl substance, forming a treated aqueous stream, the reactor including a catalyst flow controller configured to automatically increase the catalyst concentration in the reactor while agitating the catalyst-containing solution during reaction, and removing catalyst particles from the treated aqueous stream to form a purified aqueous stream. In some cases, the feed to the reactor is atomized. Corresponding systems also are disclosed.

A method of removing chemical contaminants from a composition comprising an active, a solvent, and a contaminant can include providing an initial feed supply, wherein the initial feed supply comprises the active, the solvent, and the contaminant, wherein the contaminant can include 1,4 dioxane, dimethyl dioxane, or a combination thereof; including filtering the initial feed stock through a nanofilter and using reverse osmosis.

A plant for the treatment of waste water on board of vessels having a collection tank of black water and grey water, a primary treatment unit including a band filter, a secondary treatment unit including a micro-filtration or ultra-filtration module and a tertiary treatment unit including an ozone treatment module is provided.

A plant for the treatment of waste water on board of vessels having a collection tank of black water and grey water, a primary treatment unit including a band filter, a secondary treatment unit including a micro-filtration or ultra-filtration module and a tertiary treatment unit including an ozone treatment module is provided.

Contaminants can be removed from liquids in accordance with systems and methods herein. One exemplary method can involve introducing an input liquid into a pressurized chamber. The method can also involve oxidizing an organic or inorganic contaminant in the input liquid by heating the input liquid in the pressurized chamber, to create an output liquid that has less of the organic or inorganic contaminant than is present in the input liquid. And the method can involve outputting the output liquid from the pressurized chamber.

Contaminants can be removed from liquids in accordance with systems and methods herein. One exemplary method can involve introducing an input liquid into a pressurized chamber. The method can also involve oxidizing an organic or inorganic contaminant in the input liquid by heating the input liquid in the pressurized chamber, to create an output liquid that has less of the organic or inorganic contaminant than is present in the input liquid. And the method can involve outputting the output liquid from the pressurized chamber.

Provided are a system for monitoring a hydroxyl radical scavenging index in water using a real-time multi-fluorescence analyzer and a parallel factor analysis apparatus and a method therefor, wherein the system monitors the hydroxyl radical scavenging index in water using the real-time multi-fluorescence analyzer and the parallel factor analysis apparatus, whereby it is possible to monitor the characteristics of an organic material in target water through a continuous flow analysis method without using an existing indicator material, rhodamine B. In addition, in a water treatment system having an advanced oxidation process (AOP) applied thereto in which ozone, ultraviolet rays, hydrogen peroxide, and the like are combined, it is possible to simply calculate the hydroxyl radical scavenging index in the target water through an organic material characteristic index for each component obtained by classifying the characteristic structure of the organic material in water using real-time fluorescence analysis by means of a parallel factor (PARAFAC) model. Accordingly, the amount of chemical injection and the amount of ultraviolet irradiation, which are process control variables, can be controlled, and under given operating variable conditions, the removal rate of a target material in water is predicted, whereby the system can also be used as a diagnostic tool for process evaluation in the advanced oxidation process. Furthermore, the system can provide operational convenience that enables process control while reducing the amount of power consumed in the advanced oxidation process even though the type of target material and the water quality characteristics of raw water change.

The present invention relates to a liquid and drink purification and stirring device. The device is handheld and can be used for a variety of liquid drinks, such as water, juices and wines. The device is designed like a stirring rod or straw and has the material composition that enables the device to attract and adhere various solutes thereto when suspended in liquid mediums. The device features an elongated wand and a handle. The wand is made from food-grade copper and when submerged in a liquid, attracts unnatural solutes, and kills pathogens such as bacteria, algae, viruses and many more. The handle can be made from any food grade and FDA approved material and can be integrated or removably-attached to the wand. The device is also used for stirring the liquid and enables consumers to play a greater role in managing their own health and to prohibit consumption of pathogens

A method for treating a wastewater or a wastewater sludge includes adding performic acid to the wastewater and/or the waster sludge as an odor controlling agent and/or corrosion controlling agent.

The methods disclosed generally relate to treatment of process water using chlorine dioxide. Specifically, reactants may be fed asynchronously into a diluent line or a tank where the reactants may mix and react to form chlorine dioxide. The chlorine dioxide levels may fluctuate in the diluent line or the tank thereby inhibiting or reducing the growth of microbes.