Separation methods and systems for converting high concentrations of animal wastes and other nutrient-rich organic materials into nutrients and other useful products such as struvite and potassium struvite. Advantageously, the system and methods do not require the addition of external chemicals other than an acid and a base.

A plasma electrode module, an underwater plasma discharge device including the plasma electrode module, and a water treatment system are provided. The plasma electrode module includes a conductive substrate including a plurality of holes, a ceramic layer surrounding a portion of the outer surface of the conductive substrate, and a plasma electrode disposed in each of the plurality of holes, wherein the plasma electrode has a multilayer structure in which a cylindrical ground portion, a fixed portion, and a discharge portion are sequentially stacked, the ground portion is in contact with the conductive substrate and plasma is generated on the discharge portion, and each of the plurality of holes has a diameter in a range of 1 mm to 10 mm.

A system comprising an agitation and flocculation system and a particulate filter capture system, and optionally a feedback system and/or a water softening. The agitation and flocculation system configured to receive a contaminated aqueous stream and an anhydrite quantity, and comprising means for agitating the aqueous stream and a means for mixing the aqueous stream with the anhydrite, such that a precipitate of calcium sulfate hydrate+contaminant complexes is formed. Also, a system comprising a fixed-bed type cross-flow system and a particulate filter capture system, and a corresponding method of removing per- and polyfluorinated alkyl substances from the contaminated aqueous stream. The method comprising the acts of: providing an anhydrite quantity; contacting and agitating the anhydrite quantity with a contaminated aqueous stream; and collecting the precipitate of calcium sulfate hydrate+contaminant complexes formed from the aqueous stream.

A wastewater treatment system includes a biological treatment plant and an auxiliary, non-biological treatment plant. The auxiliary plant receives overflow, which can be sanitary sewer overflow, combined sewer overflow or strictly storm overflow. Treatment is by coagulation and membrane separation, removing most bacteria. Following treatment the outflow can be discharged to streams.

A method for water treatment, wherein the water for treatment is conducted by a conveying device from an inlet to an outlet via multiple treatment stages, wherein at least one of the treatment stages is an oxidation stage in which foreign matter situated in the water is oxidized by an oxidant which is added to the water in or upstream of the oxidation stage, and at least one of the treatment stages to which the water is fed after the processing by the at least one oxidation stage is a separation stage in which foreign matter situated in the water after processing in the at least one oxidation stage is precipitated and separated off by addition of at least one separating agent, in particular of a flocculant and/or of activated carbon.

A roll assembly for increasing a surface area of a fluid, in particular for water treatment, including at least one shaft which in each case bears at least one roll, a drive for the at least one shaft, a fluid feed which is arranged above the respective roll and guides the fluid to the respective roll, and a collecting trough for the fluid, the collecting trough being assigned to the respective roll, wherein the roll has two lateral surfaces in the shape of cylinder jackets which are spaced apart in the radial direction, are each in the form of a mesh and project on the bottom side of the roll into the collecting trough.

The invention relates to a program-controlled apparatus (1) for washing items that is equipped with a water purification system (8) for purifying the wash liquor by removing detergent and suspended soil, which purification system (8) utilizes addition of flocculant, wherein the amount of flocculant that is added is controlled to minimize the total amount of flocculant used without compromising the efficacy of the purification treatment.

A system comprising an agitation and flocculation system and a particulate filter capture system, and optionally a feedback system and/or an ion exchange resin system. The agitation and flocculation system configured to receive a contaminated aqueous stream and an anhydrite quantity, and comprising means for agitating the aqueous stream and a means for mixing the aqueous stream with the anhydrite, such that a precipitate of calcium+contaminant complexes is formed. Also, a system comprising a fixed-bed type cross-flow system and a particulate filter capture system, and a corresponding method of removing per- and polyfluorinated alkyl substances from the contaminated aqueous stream. The method comprising the acts of: providing an anhydrite quantity; contacting and agitating the anhydrite quantity with a contaminated aqueous stream; and collecting the precipitate of calcium+contaminant complexes formed from the aqueous stream.

The invention is classified as a physicochemical method of natural and waste water treatment and can be used in the energy engineering, chemical, petrochemical, food and other industries, especially in treatment of process, domestic, precipitation, mining, oilfield, quarry water and the water of tailing pounds.

The purpose of the invention is to improve the treatment of natural and waste water, to increase the capacity of a moving bed pressure filter and also to ensure high efficiency of the cleaning of the moving bed.

The technical result is the expansion of the range of application of the moving bed pressure filter ensuring high efficiency of treatment of both low-contaminated natural water and highly contaminated waste water.

This result is obtained due to the use of additional stages of chemical treatment during water treatment (oxidizing agent, demulsifier, powder sorbent), the use of various types of a pressure flocculation reactor, grains for a single and double moving bed, which have different grain composition and density, the performance of four-stage cleaning of the moving bed, the use of a dual-flow moving bed pressure filter, as well as due to the use of the additional pressure flocculation reactor followed by the removal of severe contamination with the use of a pressurized hydrocyclone.

Methods and systems for treating tailings at an elevated pH using lime are disclosed herein. In some embodiments, the method comprises (i) providing a tailings stream comprising bicarbonates and a pH less than 9.0, (ii) adding a coagulant comprising calcium hydroxide to the tailings stream to form a mixture having a pH of at least 11.5 and a soluble calcium level no more than 800 mg/L, and (iii) dewatering the mixture to produce a product having a solids content of at least 40% by weight. In some embodiments, the pH and soluble calcium level of the mixture cause chemical modification of clay materials of the mixture via pozzolanic reactions. In some embodiments, the undrained shear strength of the product increases over a period of time of at least two days.