Abstract: A multi-barrier system for cleaning waste water, in particular for the removal of pathogenic microbes from waste water, and a method for the removal of pathogenic microbes from waste water with the multi-barrier system. The multi-barrier system includes an enclosed containment that comprises a first water container, an adjustable ozonation unit, a second water container and a UV unit. In addition, the first water container comprises an ozone-resistant filtration unit.

Abstract: A method for processing interface emulsion, water, and solids contained within a separator vessel that comprises the steps of continually extracting those components from the vessel and then passing them through a gas flotation cell. The cell, which is preferably a vertical induced gas flotation cell, separates the oil and water contained in the interface emulsion and discharges recovered oil from an upper portion of the cell and treated water from a bottom portion of the cell. The recovered oil and treated water may be further processed and recycled to the vessel or sent elsewhere. The treated water may also be recycled to the cell or sent to a process sewer. Fuel gas residing in an upper portion of the cell may be cooled and passed through a splitter. All the steps of the method comprise a closed system with no air emissions.

Abstract: A lubricant reclamation system comprising a reclamation housing providing an exterior shell and an interfacing surface defining a housing interior. One or more conductive reclamation subassemblies are disposed within the housing interior. Each conductive reclamation subassembly comprises a conductive reclamation matrix having a series of conductive reclamation passages passing therethrough. Power is provided to the conductive reclamation matrix to energize the material. The energized material aids in the reclamation process by interacting with ionic characteristics of the fluid, magnetic particulate matter, and the like. An additive delivery subassembly is disposed within the housing interior. The additive delivery subassembly comprises an additive form having a series of additive passages passing therethrough. An additive is embedded within the additive delivery subassembly in a manner enabling dissolution of the additive as the fluid passes through the plurality of additive passages.

Abstract: Apparatus and methods are provided for removing solids from wastewater. The apparatus may include a dissolved solids removal system including a first membrane stack for removing a first portion of dissolved solids from wastewater, the first membrane stack having a first rejection rate and including at least one first membrane having a first operating pressure rating. A first solution unit may be included downstream of the at least one first membrane, the first solution unit being configured to maintain a differential pressure over the at least one first membrane below the first operating pressure rating. The dissolved solids removal system may also include a final membrane stack for removing a final portion of dissolved solids from the wastewater, the final membrane stack being located downstream of the first membrane stack and having a final rejection rate higher than the first rejection rate.

Abstract: A series of cascading basins is excavated along a sloped floodway typically established between adjoining agricultural fields. These basins address problems of stormwater runoff from agricultural lands and certain urban areas where runoff carries sediment, nitrogen, phosphorous and other pollutants into nearby streams, rivers and tidal waters, The cascading basin series begins with basin placement at a higher topographical elevation, followed by basin positioning downwardly along a natural or excavated floodway slope simulating a terraced effect. As upper basins are filled they spill over into basins therebelow. Angular features of basin exit grade and stormwater escape slopes retard egress of stormwater. A lowermost terminal basin includes sand berm, boulders, rip rap and other barriers to retain the polluted runoff. Basins may include vegetation, slag stone layers, and other pollutant treatment elements.

Abstract: According to one embodiment, water to be treated is passed through each of a first reactor vessel and second reactor vessel, phosphorus contained in the water is removed by using an adsorbent, thereafter the liquid held in each of the reactor vessels is discharged from each of a first treated water discharge path and second treated water discharge path, and thus the influence of soluble impurities derived from the water is eliminated. Further, when suspended solids impurities contained in the water are accumulated in the phosphorus adsorbent, the accumulated impurities are eliminated by a reverse cleaning operation using a liquid to be thereafter introduced from a reactor vessel liquid introduction path into the reactor vessel, and hence the influence of the suspended solids in the water on a desorption agent liquid to be thereafter introduced into a crystallization vessel, and containing phosphorus from the phosphorus adsorbent is eliminated.

Abstract: Systems and methods for improving the quality of solids and liquids recovered at atmospheric pressure and temperature from a stillage stream generated as a by-product of an ethanol production process, the recovered solids having higher bio-available amino and fatty acids than evaporation-produced condensed solubles, the recovered liquids having less total solids and total suspended solids than evaporation-produced condensate. A static mixer includes an input for receiving the stillage stream combined with a GRAS anionic polymer, a cylindrical mixing chamber that controllably mixes the stillage stream and the polymer to generate wet flocculated solids and liquid co-product, and a discharge chute that outputs the wet flocculated solids and liquid co-products onto a moving, gravity filter belt having a membrane surface that separates the output from the static mixer into recovered liquids in the form of clarified, thin stillage and recovered solids in the form of dry flocculated solids.

Abstract: A water treatment device including an electro-coagulation (EC) unit for treating a stream of feed water to produce a stream of EC treated water of lower salinity than the stream of feed water, an electrical separation unit for treating the stream of EC treated water to obtain a stream of product water of lower salinity than the EC treated water, and a precipitation unit for providing a stream of wash water to wash the electrical separation unit and become a stream of reject water flowing back to the precipitation unit, wherein precipitation in the precipitation unit produces the stream of wash water of lower salinity than the stream of reject water.

Abstract: Provided is a wastewater treatment device that can reduce the fluoride ion concentration in industrial wastewater to improve the recovery rate of purified water. A wastewater treatment device (1) includes a biological treatment unit (3) that decomposes and eliminates organic matter in wastewater by means of microorganisms, and a desalinization unit (4) that is provided downstream of the biological treatment unit (3) and eliminates salt-forming ionic components from within the wastewater. A pretreatment unit (2), which removes components, such as heavy metals or oil contained in the wastewater, which inhibit the function of the biological treatment unit (3) or the desalinization unit (4), is provided upstream of the biological treatment unit (3), and the pretreatment unit (2) is provided with a fluoride concentration reduction unit that reduces the concentration of fluoride ions in the wastewater by eliminating the fluoride ions from within the wastewater.

Abstract: Method for the removal of organic components from a mixture of organic components and water, characterized in that it comprises the steps of guiding the mixture through at least one vessel (3) in which has been provided an amount of organoclay (17) in at least one removable casing (18) which is permeable to liquids and gasses but not to organoclay particles, or on a supporting structure (28) from where the organoclay particles cannot come off, such that the amount of organoclay particles is at any time part of a removable entity; and of producing a flow through the aforesaid mixture in this vessel (3) by guiding a flow of gas bubbles through this mixture.

Abstract: A process for preparing conventional water sources for providing “ideal state” cellular wellness benefits via topical hydration and natural transdermal, epithelial or epicellular absorption. The invention's process considers preconditioned water sources that have removed solids, dissolved solids, contaminants—both organic and inorganic and subsequently the method purifies the water respective of removing pathogens, and structures the water for cellular uptake in the form of vicinal grade water, with improved characteristics of ideal frequency, cluster size, pH, before safely introducing negative ORP (highly ionized state) to the water structure and organic nutrients or other supplemental pharmaceutical grade organic materials onto the skin or epithelial/epicellular environments surrounding tissue and cells.

Abstract: A greywater treatment and reuse system includes a collector for collecting greywater, a distributor for distributing treated greywater for reuse, and a treatment and storage device for treating collected greywater and for storing treated greywater before the greywater is sent to the distributor for reuse. The treatment and storage device is fluidly connected to the collector by a delivery line and is fluidly connected to the distributor by a distribution line. The treatment and storage device includes a first filter that is fluidly connected to a second filter by a connection line and a chlorinator fluidly connected to the delivery line, the chlorinator injecting a first dose of chlorine into the delivery line.

Abstract: In one embodiment, a method includes gasifying a fuel source using a first oxygen stream supplied from an air separation unit (ASU), discharging a gasifier blowdown from a gasification and scrubbing system configured to gasify the fuel source, generating a grey water from the gasifier blowdown, and biologically treating the grey water in a reactor using a second oxygen stream supplied by the ASU.

Abstract: A simplified portable water purification system provides an unfiltered water receiving compartment, a disposable filter cartridge, and a filtered water reservoir all in a single container. The container has a removable lid and is a vertically positioned, wide-mouth, tubular structure. The disposable filter cartridge is horizontally positioned centrally and divides the container into the two compartments. Contaminated and unfiltered water poured into the top receiving compartment of the container gravitates through filtering materials in the disposable filter cartridge. Filtering materials include a media stabilization plate having substantially vertical perforations therethrough for containing iodinated resin. An embodiment includes a vent system that allows backwashing of the filter element.

Abstract: This invention relates to the field of water purification and desalination. In particular, embodiments of the invention relate to systems and methods of removing essentially all of a broad spectrum of impurities from water in an automated industrial process that requires minimal cleaning or maintenance during the course of several months to several years, with relatively high yields of product water per unit of input water, flexibility with respect to energy sources, compact design with a low industrial foot-print, the ability to recover valuable by-products, and ultra-low energy requirements.

Abstract: The present invention is directed to systems and methods of treating wastewater. The present invention may include a method of treating such wastewater comprising selenium in the form of water soluble selenates, selenites, and/or selenides, the method including: a chemical/biological treatment process, causing the water soluble selenates, selenites, and/or selenides in the wastewater to be converted into insoluble elemental selenium; and a physical treatment process, trapping the insoluble elemental selenium in a filtration device.

Abstract: A water treatment system, for example for treating grey water from domestic appliances comprises a water treatment device containing a filter media through which the water passes to remove particulates and bio-matter. The device has a lid provided with a spraying device. The spraying device may, for example, receive treated water along a line, possibly with the addition of an anti-foaming agent. Operating of the spraying device thus serves to collapse any foam generated within the water treatment device. Filter media can be cleaned periodically in a cyclone, after being drawn up through a pipe by means of a jet pump, receiving treated water along a line. Treated water is stored in a storage tank for subsequent use.

Abstract: The present invention relates to an upstream ozone contact tank for removing residual ozone. The upstream ozone contact tank includes an inlet through which purified raw water flows, at least one contact chamber, at least one reaction chamber, an upstream contact chamber, and an outlet that discharges ozone-treated raw water. Especially, the invention provides an upstream contact chamber between the reaction chamber and outlet, wherein the upstream contact chamber includes carbonaceous filter media mounted on a porous plate. An openable gate unit is installed at the lower part of a panel partitioning a final reaction chamber and the upstream contact chamber and controls flow rate. Additionally, the invention enables upstream flow of the raw water flowing into the upstream contact chamber from the final reaction chamber so that the raw water may pass through the carbonaceous filter media upwardly.

Abstract: According to one embodiment, a copper recovery apparatus includes a precipitation tank configured to precipitate copper hydroxide grains in water, a filter aid supplier, a mixing tank configured to mix the filter aid with a water to produce a suspension, a separator provided with a filter, a line configured to supply the suspension to the separator, thereby forming a precoat layer formed of the filter aid on the filter, a separation tank configured to receive the detached matter of the precoat layer discharged together with the detaching water from the separator to magnetically separate copper hydroxide grains and filter aid, a line configure to discharge and recover the detaching water from the separation tank, and a line configured to return the separated filter aid to the filter aid supplier from the separation tank.

Abstract: A method of obtaining industrial water or drinking water from water that contains radioactive nuclides, in radium-containing groundwater including chemically pretreating the radioactive nuclide-containing water, and filtering the chemically pretreated water, wherein, in the chemical pretreatment, manganese dioxide is added to the water and/or manganese dioxide is generated in situ in the water and wherein filtration of the chemically pretreated water proceeds using at least one ceramic filter membrane.

Abstract: Systems and methods are provided for the treatment of caustic wastewater. Specifically, systems and methods are provided for combining refinery spent caustic and ethylene spent caustic solutions and treating the combined spent caustic mixture using a wet air oxidation process.

Abstract: A mixing chamber system for removal of contaminants from a liquid, and related systems and methods, are provided. The mixing chamber system includes a length of pipe having a hollow interior. A plurality of perforated discs are stationarily positioned within the hollow interior in at least a portion of the length of pipe, wherein each of the plurality of perforated discs has a curved profile, wherein a middle portion of each of the plurality of perforated discs is offset from a radial edge of each of the plurality of perforated discs, respectively.

Abstract: An integrated process for removing sulfate from water sources, such as pretreated acid mine drainage (AMD). The multivalent cation (MVC) content of a sulfate stream is reduced by strong acid cation (SAC) ion exchange and sulfate is concentrated with a membrane system and separated as precipitate and overflow. Precipitation results from reaction of sulfate with MVC produced by regeneration of SAC with sodium chloride. The overflow is reacted with carbonate to precipitate MVC, generate sodium chloride and give a further overflow stream. This latter stream is concentrated to a level capable of being a regenerant for the SAC and when needed, used to regenerate the SAC and produce MVC for sulfate precipitation. The process minimizes the use of chemicals by treating, reconcentrating and recycling input species. Capital expenditures are minimized by precipitation of only side streams.

Abstract: A method for treating phosphate-containing wastewater, such as phosphogypsum pond water. The method includes the steps of: (a) adding a first cation to the wastewater to precipitate fluorosilicate from the wastewater; (b) adding a second cation to the wastewater to precipitate fluoride from the wastewater; (c) raising the pH of the wastewater to precipitate the second cation from the wastewater; (d) removing residual silica from the wastewater; and (e) precipitating phosphate from the wastewater. The precipitated fluorosilicate may be sodium fluorosilicate. The precipitated phosphate may be struvite.

Abstract: The present invention generally relates to systems and methods for the regeneration of spent dialysis solutions. The present invention further relates to systems and methods for continuously regenerating spent dialysis solution during dialysis. The present invention further relates to systems and methods for conducting dialysis that further include using chemical and physical separators in conjunction with ion exchange cartridges and/or adsorption cartridges.

Abstract: The invention is directed to systems and methods of biological and chemical treatment of wastewater comprising organic nitrogen compounds. Systems may include: an aerobic reactor, a first separation module for separating liquid and solid components of the wastewater; an oxidation module for removing organic materials from the wastewater; and a post-anoxic reactor for denitrifying at least a portion of the wastewater. Systems may include a second separation module and various feedback recycle lines between the components. Methods may include: degrading by the aerobic reactor more than 95% of organic compounds to ammonia, oxidizing by the oxidation module at least a portion of the ammonia to nitrates, and degrading by the post-anoxic reactor at least a portion of the nitrates to nitrogen gas and water. Systems and methods may reduce total organic carbon of the wastewater by more than 90%, and total nitrogen of the wastewater by more than 90%.

Abstract: A method for treating wastewater using a ballasted flocculation technique includes continuously measuring the concentration of suspended solids, organic matter or other impurities in the water to be treated prior to directing the water to be treated to a flocculation tank. Based on this measurement, the amount of ballast necessary to obtain treated water of a predetermined quality is then calculated. In the flocculation tank, ballast and a flocculating reagent are added to the water to form a water-floc mixture. The water-floc mixture is directed to a settling tank where a sludge-ballast mixture is settled. The sludge-ballast mixture is directed to a mixing tank and then to a separator to separate the ballast from the sludge. The separated ballast is directed to the flocculation tank. The separated sludge is directed to the mixing tank when the level of sludge-ballast mixture in the mixing tank is lower than a predetermined level.

Abstract: Convenience stores are provided a beverage water processor for coffee and beverages. The “ideal” total dissolved solids (TDS) of perhaps 110 parts per million is achieved without a blendback process. The R/O water is remineralized with a flow through calcite bath. A potassium chloride source is used to inject the exact amount of potassium chloride needed to reach the ideal TDS on the fly before the water reaches the storage reservoir. Alarms trigger a bypass loop to keep the store in business during shutdown. All output water passes through a UV sterilizer.

Abstract: A method for removing liquid, gaseous and/or dissolved constituents from an aqueous stream includes contacting the aqueous stream with a porous material and then contacting the aqueous stream with an adsorbent material. The porous material includes pores having an average diameter of approximately 0.01 ?m to approximately 50 ?m and an extraction liquid immobilized within at least a portion of the pores.

Abstract: According to one implementation, a method of treating wastewater includes introducing air bubbles having a predetermined size into raw influent, allowing the air bubbles time to bind with grease particles in the influent and to rise, and collecting the grease particles bound with the air bubbles on an upper surface of the influent.

Abstract: A portable power generation and water filtration unit includes a first pump system, a second pump system, a power system, and an enclosure for housing and support. The first pump system consists of an inlet, outlet, and pump unit that is capable of connecting and pumping water from a source to a destination such as a plumbing fixture. The second pump system also includes a filter system, reverse osmosis treatment unit, and alkaline treatment unit. In addition to pumping water, the second pump is used to create sanitized water which is safe and healthful for human use and consumption. In order to supply the necessary electricity for the pump systems, a solar panel and convert sunlight to energy for storage in batteries. The batteries are then electrically connected to pumps and other electrical components, allowing the apparatus to be used off the electrical grid.

Abstract: Described herein are methods and devices for biologically treating water and/or wastewater. The methods and devices for treating wastewater may be enhanced using an surge lifting device which moves water and/or solids using volumes of air (for liquid transfer and mixing) and the automatic sludge return mechanism, combined with alternating aeration on and off operation to achieve comprehensive nitrogen and phosphorus removal. This surge lifting device can provide occasional surges of water using large bubbles which are able to move great volume of liquid while minimizing dissolved oxygen transfer to the surrounding liquid. Use of the devices and processes herein provides a simple, eloquent approach to wastewater treatment with less operation and maintenance costs than conventional devices and/or processes. The same surge lifting device can also be installed in an anaerobic digester, and use the biogas generated below the device to automatically mix the digester, without external energy input.

Abstract: Processes and systems for treating high salinity aqueous liquids containing dissolved minerals, suspended solids, colloidal solids, free oil and grease, dissolved organics, and dissolved hydrocarbons. The liquid is passed into an electrocoagulation system in fluid communication with a solids removal clarifier, pressurized ultrafiltration system, the draw side of forward osmosis, and a dilute draw water reverse osmosis system. Impaired water with high sulfate content is used as a source of deionized water for dilution of the forward osmosis draw solution. After concentration, the forward osmosis feed solution is further treated by lime soda softening and sludge from the softening system may be recycled to increase hardness precipitation and silica removal, the outfall from which may be treated by a separate ultrafiltration system and a feed water reverse osmosis system. Concentrate from the feed water reverse osmosis system can be treated to offer a zero liquid or near zero liquid discharge.

Abstract: A customizable multi-stage fluid treatment assembly typically includes a connector, a plurality of cartridges, and a cap. The plurality of cartridges have a treatment medium spaced within an interior volume of the individual cartridges, between the ends thereof. The ends of the plurality of cartridges are configured to receive a fluid, bring the fluid into operative contact with the treatment medium, and dispense the fluid from the opposing end of the cartridge. The connector is coupled with one end of the plurality of cartridges and has an inlet and an outlet for receiving and dispensing the fluid to and from an appliance. The cap is coupled with the other end of the plurality of cartridges, enclosing the fluid treatment assembly, which is configured to be received in a cavity of an appliance. The cartridges of the plurality of cartridges may be individually replaced with cartridges to meet customized needs.

Abstract: The invention relates to apparatuses, systems, and methods for the treatment of contaminated fluids, in particular water. The system is generally a continuous flow system including a multi-stage cavitation device, an electrocoagulation device, and an air flotation unit. The electrocoagulation device includes a plurality of interweaved cathode and anode plates. The anode plates are coated with an oxygen generating mixed-metal oxide coating. The air flotation unit includes a cavitation aerator and electrode blocks to introduce air bubbles into the fluid. Contaminants attach to the air bubbles and float to the fluid surface where they are removed as sludge. Treated fluid is passed through a final filtration system. The methods involve the processes imparted by the various apparatuses on the fluid.

Abstract: A bioartificial kidney equivalent and a process for producing the bioartificial kidney equivalent. The hybrid bioartificial kidney comprises human proximal and distal renal tubule cells grown on particular synthetic membranes.

Abstract: A method of treating water to reduce pollutants comprises mixing an adsorbent reagent with the water to form a water-adsorbant reagent mixture. Thereafter, subjecting the mixture to a liquid-solids separation process that produces treated water and sludge. The method further includes contacting the water or treated water with a living aquatic organism wherein the value of at least one property of the organism is correlated to the concentration of pollutants in the water. This value is evaluated and the method entails adjusting the quantity of adsorbent reagent mixed with the water as a function of the value of the property.

Abstract: A standardised, modular mobile water purification unit for the production of safe potable water and for treatment of wastewater is disclosed to fulfill the water need for humans, animals and households. In one embodiment, the unit can be based on a standardized climate-controlled container that is robust both physically and functionally, can be easily transported and quickly set up in remote regions and disaster areas. The unit may work for purification of water of brackish, sea or polluted surface water, and of wastewater, and can be customised to the given water type based on easy changeable treatment modules. The unit includes a rigid frame that can be removed from the container, and also includes a control system for remote monitoring and control of the unit.

Abstract: Bicarbonate conversion assisted reverse-osmosis (RO) treatment systems for treatment of contaminated water, particularly natural gas flowback water. The systems and processes provide for simultaneous conversion of the primary salt in gas production flowback waters from sodium bicarbonate to sodium sulfate, and flotation removal of organic contaminants, for the enhanced water recovery by RO of these waters. In the systems and processes, RO processes are enhanced by lowering the osmotic potential of the water being processed, by converting the bicarbonate ions to sulfate ions.

Abstract: Hydraulic fracturing produces backflow water that is high in total dissolved solids, hardness and silica. A system to treat backflow water has an electrical separation unit and a reverse osmosis (RO) unit. The electrical separation unit may comprise an electrodialysis device (ED), an electrodialysis reversal (EDR) device or a supercapacitive desalination (SCD) device, or a combination thereof. The electrical separation unit may be combined with a precipitation unit and reduces the TDS and hardness of the backflow water. The RO unit reduces the silica concentration of the backflow water. A pre-treatment unit may further condition backflow water treated in the electrical separation unit to inhibit fouling in the RO unit. The treated backflow water may be suitable for reuse in hydraulic fracturing or discharge.

Abstract: Embodiments relate to systems and methods for treating produced water and other contaminated water that can be customized or adapted to particular characteristics of the water and/or its contaminants or other contents while minimizing costs related to treating the water. In an embodiment, a method of treating produced water comprises degrading solid particles in the produced water using beneficial bacteria; filtering solid particles from the produced water; reducing pathogenic bacteria in the produced water by introducing ozone into the produced water; reducing contaminants in the produced water by passing the produced water through at least one filter; reducing salts in the produced water using a reverse osmosis system; and providing treated produced water.

Abstract: A High Efficiency Treatment System (system) wastewater treatment system including a tank with a multi-chamber tank system that is designed to remove pollutants from domestic wastewater. Embodiments of the system consist of a pretreatment chamber, which is in fluid communication with an anoxic chamber, which is in fluid communication with an aeration chamber, which is in fluid communication with a clarification chamber, and which is in fluid communication with a polishing chamber. The system can be applied to remove suspended solids, BOD, ammonia, nitrate and TKN from wastewater.

Abstract: A process and apparatus for refining iron from high-phosphorus content iron ores. The process involves mixing a high-phosphorus iron oxide ore and an alkaline solution of pH between about 12.5 and 13.5, screening the mixture by gravity to separate an alkaline-high-phosphorus solution from a low-phosphorus iron ore; and treating the low-phosphorus iron ore with lime and a natural gas.

Abstract: Methods and apparatus for processing glycol according to various aspects of the present technology comprise a multi-stage treatment system that is configured to receive a feedstock from multiple waste stream sources containing glycol. A pre-treatment stage may be configured to process the incoming the feedstock and provide to a primary treatment stage a water/glycol solution that is substantially identical and allows for a primary treatment process that is not dependent upon the originating source of the glycol feedstock. A post-treatment stage may further process and purify the water/glycol solution.

Abstract: One exemplary embodiment can be a process for purifying a disulfide oil. The process can include obtaining at least a portion of a disulfide oil coalesced from an alkaline stream, and passing the at least a portion of the disulfide oil through a mesh for recovering a purified disulfide oil stream.

Abstract: Methods and apparatus relate to treating fluid to at least reduce selenium content within the fluid. The treating includes conditioning stages to alter a composition of the fluid prior to removal of the selenium content from the fluid. The composition of the fluid after the conditioning stages facilitates the removal of the selenium content or at least limits detrimental impact to selenium removal efficiency.

Abstract: An aggregating agent injector (12) employs water currents generated by a raw water pump (10) to have flowing raw water undergo injection of an aggregating agent for aggregation of solids in raw water to form flocs, a first stirrer (13) works, as raw water inflows with the aggregating agent injected therein, for use of water currents thereof to stir inflowing raw water, and cause to outflow, a flocculation vessel (14) works, as stirred raw water inflows, to have inflowing raw water reside therein to form flocs, and cause to outflow, by using water currents thereof and a centrifugal separator (15) works, as raw water inflows with flocs therein, for use of water currents thereof to have inflowing raw water swirl, effecting centrifugal separation thereof into flocs as solids and processed water.

Abstract: A system and method for the treatment of wastewater. In one aspect, the invention can be a method for treating wastewater comprising: a) introducing untreated wastewater into a holding tank: b) flowing the untreated wastewater into a first wastewater treatment trailer to provide a first treatment regimen to the untreated wastewater to form a first treated wastewater c) flowing the first treated wastewater into a second wastewater treatment trailer to provide a second treatment regimen to the first treated wastewater to form a second treated wastewater; and wherein the holding tank, the first wastewater treatment trailer and the second wastewater treatment trailer are fluidly coupled together to facilitate flow of the untreated wastewater from the holding tank into the first wastewater treatment trailer and flow of the first treated wastewater from the first Wastewater treatment trailer into the second wastewater treatment trailer.

Abstract: A multistage dissolved air flotation and advanced oxidation (MDAF-AO) system/method with multi-functions in oil recovery, solids removal, emulsion breaking, and advanced oxidation. Influent, with oil and suspended solids, enters a first stage for oil recovery includes a gas ionizer and an air dissolving pump. A second stage includes of two coagulation/flotation compartments connected in serial to enhance solids removal efficiencies. Micro air bubbles are created by air dissolving pumps in each compartment. A third stage is for the emulsion breaking unit to further remove or recover the emulsified oils. A fourth stage includes advanced oxidation by using ultraviolet (UV) and hydrogen peroxide to oxidize and disinfect the bacteria and microorganisms.

Abstract: To recover drilling fluid used in sample drilling at a drilling machine, when the drilling fluid exits the drill hole, and to transport it to a separate cleaning unit wherein solid matter is separated from the drilling fluid. The cleaned drilling fluid is returned to the drilling machine and reused in sample drilling. The cleaning unit has an inlet connection and two or more precipitation basins, where the solid matter accumulates on the bottom of the basin. In the bottom part of at least one precipitation basin there is a valve arrangement for removing drilling fluid sludge containing solid matter from the precipitation basin, which drilling fluid sludge is filtered with a filter arrangement. In the top part of the precipitation basin there is a transfer connection between precipitation basins or an outlet connection for taking cleaned drilling fluid out from the cleaning unit back to the drilling process.