A system for separating a soluble solution includes a first freezer configured to receive a liquid feed stream and a refrigerant stream, and discharge a concentrated solution stream, wherein the first freezer is configured to exchange heat between the liquid feed stream and the refrigerant stream through direct contact within the first freezer and freeze a portion of the liquid feed stream, a first separator external to the first freezer and configured to separate ice particles from the concentrated solution stream and recirculate the concentrated solution stream to the first freezer, and a first ice washer coupled to the first separator and configured to receive the ice particles separated from the concentrated solution stream by the first separator and wash the separated ice particles to free the ice particles from contaminants.

An automated produced water treatment system that injects ozone or an ozone-oxygen mixture upstream of produced water separators, with the dose rate changing dynamically as the produced water quality changes, as determined by continuous monitoring of the produced water quality by a plurality of sensors that detect water quality parameters in real time. The system may operate as a slipstream injection system, that draws a portion of produced water from the produced water pipeline and injects ozone or an ozone-oxygen mixture back into the pipeline with disrupting or slowing normal operations. Disinfectants or other additives may also be injected. The treatment system may be wholly or partially contained in mobile containers or trailers, for on-the-fly use in existing produced water treatment facilities. Ozone and/or nitrogen micro-bubbles and/or nano-bubbles may be introduced for friction reduction in oil and gas operations.

An inventive system and method for treatment of contaminated produced water from fracking operations. The inventive system includes a filtration unit, an electrolysis unit, and a cavitation unit. The filtration unit may comprise mesh filtration units or reverse osmosis filtration units. The electrolysis unit may include alternative anode and cathode plates, where the anode plates have a mixed metal oxide coating. Each of the filtration, electrolysis, and cavitation units preferably comprise two or more of each arranged in parallel, such that each can be operated independently without stopping the operation of the entire system. The system and method may further include separation tanks and/or dissolved air flotation tankseither before or after the electrolysis unit or cavitation unit processing.

Ion-selective separation by shock electrodialysis is performed by applying a voltage differential between electrodes across a porous medium to selectively draw a first species in a liquid toward at least one of the electrodes to a greater degree than a degree to which a second species in the liquid is drawn toward the same electrode. The voltage differential creates a shock in the charged-species concentration in the bulk volume of the liquid within pore channels of the porous medium, wherein the concentration of the first species in a depleted zone of the liquid bulk volume between the shock and the ion-selective boundary is substantially lower than the concentration of the second species in the liquid bulk volume between the shock and the first electrode. A dilute stream including the second species is extracted from the depleted zone separate from a concentrated stream including the first species.

A method to improve the solid/solid separation of an amorphous aluminium trihydroxide containing suspension from a gypsum containing suspension in a saturated calcium sulphate solution without the need for a dewatering step following the solid-solid separation.

The present invention provides a process for recovering glycol from a process stream comprising glycol, water, dissolved salts, and hydrocarbons. The process comprises subjecting the process stream to a salt-enrichment process to obtain a salt-enriched stream having a salt concentration higher than salt concentration of the process stream, and a salt-reduced stream; subjecting the salt-enriched stream to a glycol reclaiming process to separate the salts and at least a portion of the hydrocarbons from the salt enriched stream to obtain a substantially salt-free water-glycol stream; and blending the salt reduced stream from the salt-enrichment process with the substantially salt-free stream to produce a reclaimed water-glycol stream.

Systems and methods for using a liquid hot metal processing unit to produce granulated metallic units (GMUs) are disclosed herein. In some embodiments of the present technology, a liquid hot metal processing system for producing GMUs comprises a liquid hot metal processing unit including a granulator unit. The granulator unit can include a tilter positioned to receive and tilt a ladle, a controller operably coupled to the tilter to control tilting of the ladle, a tundish positioned to receive the molten metallics from the ladle, and a reactor positioned to receive the molten metallics from the tundish. The reactor can be configured to cool the molten metallics to form granulated metallic units (GMUs).

A method for removing sulfates from seawater by immersing a barium adsorbent into produced water to adsorb the barium ions from the produced water. The adsorbent is combined with an acidic solution that pulls the barium ions into the acidic solution. The acidic solution containing barium ions is combined with seawater to precipitate the sulfate as barium sulfate (BaSO.sub.4).

A process includes supplying a waste completion fluid including a viscosifier polymer; and treating the waste completion fluid with a non-oxidizing inorganic acid to form a metal bromide brine. The process also includes coagulating the viscosifier polymer and collecting the viscosifier polymer.

A system for water desalination includes a membrane module and an ejector module. The membrane module includes a feed tank for salt water, a heater, a humidifier receiving heated salt water and a carrier gas to form a wet gas, and a membrane distillation unit. The membrane distillation unit includes a feed chamber, a membrane, and a permeate chamber with a sweeping gas inlet. The membrane allows water vapor to pass from the feed chamber to the permeate chamber. The ejector module includes an ejector and a bubble column dehumidifier. The ejector has first and second inlets for primary and secondary fluid streams, respectively, creating a mixed stream. The bubble column dehumidifier receives the mixed stream to produce fresh water. The second inlet of the ejector receives both wet gas from the humidifier and sweeping gas from the permeate chamber as the secondary fluid stream.