Apparatus and methods are related to treating waste water containing ammonium salts, which contains NH.sub.4.sup.+, SO.sub.4.sup.2−, Cl.sup.−, and Na.sup.+. In such a method, the pH value of the waste water to be treated is adjusted to a specific range in advance; sodium sulfate crystal and relatively concentrated ammonia are obtained by first evaporation, and then sodium chloride crystal and relatively dilute ammonia is obtained by second evaporation; alternatively, sodium chloride crystal and relatively concentrated ammonia is obtained by third evaporation, and then sodium sulfate crystal and relatively dilute ammonia are obtained by fourth evaporation. Ammonia, sodium sulfate, and sodium chloride from the waste water are recovered so that the resources in the waste water can be reused.

A method and system is provided for reducing produced water disposal volumes utilizing waste heat generated by thermal oxidation. Waste heat generated by thermal oxidation can be used to vapourize excess water, and to treat and scrub the water vapour for final release into the atmosphere. The system can utilize excess heat remaining after thermal oxidation to produce water vapour.

An evaporator for submerged combustion and delayed evaporation, a method of the same and a system of combined evaporation devices, the evaporator for submerged combustion and delayed evaporation comprises: a housing formed with a space for containing an evaporating liquid; a separator plate arranged in an interior of the housing and dividing the housing into a heat transfer (submerged combustion) area and an evaporation area; a vapor chamber located above a liquid surface of the evaporation area; a flue gas chamber located above a liquid surface of the heat transfer area, wherein the flue gas chamber is provided with a flue gas outlet, the flue gas outlet is provided with a pressure valve which is capable of controlling a gas pressure within the flue gas chamber such that a gas pressure within the flue gas chamber is larger than a gas pressure within the vapor chamber.

A system to treat and desalinate wastewater using a low energy ejector desalination system (LEEDS), which employs a static liquid-gas ejector and maximum heat integration in the water treatment system.

A system and process for decontaminating a bio-contaminated wastewater fluid as from a slaughterhouse or similar facility. The system and process recovers purified vapor/steam through a decontamination unit having a plurality of alternating rotating trays and fixed baffles in a processing vessel producing separate purified and contaminant streams. One or more filter/strainer units are disposed in parallel before the decontamination unit, and may be used alternately while the other is cleaned. A rotating shaft connected to the rotating trays may also connected to an electrical generator to provide electricity for circuits and controls in the system.

A water vapor distillation system. The system includes a water vapor distillation device configured to receive a volume of source water from a fluid source and produce distillate, the device comprising: a concentrate flow path comprising a concentrate output; a distillate flow path comprising a distillate output; at least one source proportioning valve; a first heat exchanger comprising at least a portion of the distillate flow path; a second heat exchanger including at least a portion of the concentrate flow path, wherein the first heat exchanger and the second heat exchanger in fluid flow communication with the fluid source; a distillate sensor assembly in communication with the distillate flow path and located downstream the first heat exchanger, the distillate sensor assembly configured to generate a distillate temperature measurement; and a controller configured to control the source proportioning valves, the controller configured to: receive the distillate temperature measurement; determine the difference between a first target temperature and the distillate temperature measurement; and split the source water from the fluid source between the first heat exchanger and the second heat exchanger based on the difference between the first target temperature and the distillate temperature measurement.

A system includes an evaporator having sensors and selectable operational parameters and a controller configured to receive data and determine operational configuration for the evaporator. Selectable parameters relate to system heating, liquid flow rate, air flow rate, and environmental data.

A wastewater collection tank feeds a vaporizing unit through an inlet near the unit's top. A burner produces hot air, which a blower blows through a blower tube that passes through the upper portion of the unit to the bottom portion of the unit. A substrate through which air can pass extends across the unit between the bottom of the blower tube and the wastewater inlet. The hot air moving upward through the unit heats the falling wastewater, a substantial portion of which is vaporized therefrom. The vapor is vented from the top of the unit. Un-vaporized wastewater collects at the bottom of the unit and is recycled through the system with raw wastewater in the collection tank.

This disclosure concerns a system for purifying contaminated water and a method for using the system. More specifically, the invention concerns removing contaminants, such as those introduced by fracking, from a contaminated water.

A combined vessel comprises a stripping section for removing acid gases from a sour water stream and a direct contact heat exchanger section for heating a graywater stream in order to improve heat and mass transfer in the treatment and recycle of water streams for a gasification process.