Provided is a method and device for a waste water treatment process. In one exemplary embodiment influent waste water and a defined portion of treated effluent water are combined during a first time interval to produce pretreated water. The pretreated water is dosed with selective chemical additives formulated to cause separation of solid and liquid media during a second time interval, producing separated water. Remaining solid media is removed from the separated water with a sludge filter to produce treated effluent water.

The invention relates to a multi-stage medical sewage sterilization device and method based on graphene nano technologies. The multi-stage sterilization device comprises multiple stages of graphene nano composite sterilization grids, a graphene photocatalytic sterilization tank, a graphene-modified diatom ceramic disinfection tank, an ultrasonic sterilization tank and a laser and near-infrared sterilization device. Compared with a traditional method, the present invention has a more thorough killing or blocking effects on pathogenic bacteria, parasite eggs and the like in various medical sewages. In addition, the device of the present invention can be disassembled and cleaned regularly, and has a long service life, thus the process cost is reduced.

A water filter is provided. The water filter includes a melt blown filter including a melt blown filter inlet. The melt blown filter inlet forms a water filter inlet. A carbon filter is in fluid communication with the melt blown filter. A thermoplastic polymer filter is in fluid communication with the carbon filter. The thermoplastic polymer filter includes a thermoplastic polymer filter outlet. The thermoplastic polymer filter outlet forms a water filter outlet.

A mixing assembly has a container adapted to receive a continuous flow of turbid or contaminated water. An injector is adapted to inject a quantity of polymer into the container. A settling assembly is adapted to receive a continuous flow of polymer water from the mixing assembly via a pump. A first line couples the mixing assembly with a source of turbid or contaminated water. A second line couples the mixing assembly and the settling assembly.

A method is provided for recovering fractions from an animal rendering process wastewater stream, wherein the fractions include one or more of fat, oil, grease, and protein derived from an animal source. To recover the fractions, the wastewater stream is processed to separate insoluble or immiscible contaminants as collected skimmings, and treating the collected skimmings with an effective amount of a nonionic demulsifying surfactant.

An apparatus for water purification comprising a flexible, collapsible water container (2a, 2b) to which a purification unit (4) is connected by a tube (3) for purification of water driven through the purification unit (4) by gravity. The container is produced by welding or gluing a laminate with an overlay region.

A process for the industrial production of sea water (M3) that is basically suitable for alimentary use, includes the following steps: drawing sea water with corresponding decantation (3); filtration (4); and sterilization (5), until a purified sea water (M1) is obtained; the process being characterized in that it envisages the further steps of: boron abatement (6) until a sea water is obtained with a boron content of less than one milligram per liter (M2); further filtration (7); sterilization (8) of the possible residual microorganisms; continuous and strict analyses, examinations, and checks (9) of the sea water in the respective various steps of purification thereof, to guarantee that a sea water (M3) is obtained that is microbiologically pure, filtered, and hence free from any pathogenic agents; and storage in tanks or bottling (10) of the purified sea water ready for use in various applications, amongst which basically alimentary use.

Disclosed are methods to predict the occurrence of polarization and the design and operation of electrochemical systems to maintain a current density below the limiting current density and avoid instability.

An improved livestock wastewater treatment system for treating wastewater produced by a confined animal feeding operation (CAFO) facility to reclaim water and solids from the wastewater, and to reduce the environmental footprint of the CAFO facility is provided. The treatment system combines both mechanical and chemical water treating and includes separation of liquids from solids, collection of the separated solids at various stages, and treatment of the remaining liquid so that it can be reclaimed. Methods of treating livestock wastewater with the livestock wastewater treatment system is also provided.

A method and system used to purify water that removes or reduces volatile organic compounds, calcium carbonate, cyanuric acid, and sodium bicarbonate from water to acceptable levels.