An oil-contaminated soil and groundwater treatment system, in which the polluted groundwater pumped into the electrocatalytic device uses a high-voltage electric field to change the structure of water molecules. After high voltage discharge, electrocatalysis and electrolysis, alkaline reduced water, acidic oxidized water and neutral water can be quickly produced. By the oxidation effect of electrocatalytic device anode, chloride ions and dissolved oxygen in water generate hypochlorous acid and superoxide ions, and the interaction between the two generates hydroxyl radicals and microbubbles with high oxidizing ability and long-lasting oxidation, thereby effectively remediating soil and groundwater polluted by total petroleum hydrocarbons.

A combined water aeration and filtration unit (WAFU), having a tank with a vent section at a top of said WAFU and above an aeration section above a filtration section at a bottom of said WAFU. The vent section has one or more demisters and one or more vents for detraining water and providing a dry air exit from said WAFU. The air section has a water inlet ending in a spray nozzle near the top of the aeration section to turn incoming dirty water into water droplets and a forced air blower on a side or top of the aeration section for blowing air through said water droplets in rate sufficient to remove volatile organic compounds and precipitate manganese and iron. The aeration section also has one or more annular rings or partially annular baffles on an inside wall of the tank to force water from said inside wall into an interior of the tank. Thus, no water escapes aeration. A backwash collection trough and backwash water outlet are positioned above the filtration section for removing dirty backwash water from the unit. The filtration section has one or more filters therein and a drain and clean water outlet near its bottom for egress of clean water from said WAFU.

A control system includes one or more levels of control of power and energy. At one level, a first controller optimally divides power between two or more processes, to maximize instantaneous production, for a given amount of currently available power. In the case of EDR desalination, electric power is optimally divided between ion exchange membranes and pumps to maximize instantaneous production of desalinated water for a given amount of available electric power. Optionally, at another level, a second controller divides time-varying power between the processes fed by the first level controller and an energy storage unit, based on a prediction of future power availability and a function. In the EDR case, power generated by a photovoltaic array is divided between the EDR desalination process and a battery, based on a prediction of future PV power availability and a function, to ensure reliable water production in the future.

The disclosure is a method for recovering groundwater contaminated with organic phenols. The method includes the step of injecting a remediation agent into the groundwater extracted from the stratum to be rehabilitated or ex-situ extracted, followed by the step of injecting manganese-based oxidant. By adding a suitable proportion of soluble silicon to the water to be treated as a remediation agent, the efficiency of manganese-based oxidant in the treatment of phenolic pollutants is enhanced based on interface properties and stability of various manganese oxides in the regulating and recovering process. The method for recovering groundwater contaminated with organic phenols provided by the disclosure has a simple process and is convenient to operate, the adopted chemicals are inexpensive and easy to obtain, cause little corrosion to the injection equipment, and has a wide range of applications in practice. The adopted oxidant will not produce halogenated toxic by-products during the treatment process.

One aspect of the present invention is directed to a granular filter media for removing contaminants from water or other liquids. The media comprise granular materials comprising aggregate and remediation materials. Other aspects of the invention are directed to methods of making and using the granular filter media of the invention.

The present disclosure provides methods, electrodes, and systems for electrochemical oxidation of polyfluoroalkyl and perfluroalkyl (PFAS) contaminants using Magnéli phase titanium suboxide ceramic electrodes/membranes. Magneli phase titanium suboxide ceramic electrodes/membranes can be porous and can be included in reactive electrochemical membrane filtration systems for filtration, concentration, and oxidation of PFASs and other contaminants.

Disclosed is an intelligent circulation and allocation control system for multiple surface and ground water resources, including a physical, chemical and biological multi-stage decentralized restoration system, which is respectively connected with a water quality detection and reinjection system, an integrated data processing system, an intelligent safety early warning system, and an asynchronous and self-adaptive dual-regulation optimization control system, the water quality detection and reinjection system is connected with the intelligent safety early warning system, the intelligent safety early warning system is connected with the integrated data processing system, and the integrated data processing system is further connected with the asynchronous and self-adaptive dual-regulation optimization control system. The intelligent circulation and allocation control system is based on an improved wastewater treatment process coupling physical, chemical and biological technologies and combined with an artificial intelligence technology to treat various water sources in a macroscopic water environment and optimize allocation control.

The invention relates to a method and a system for purification of water in a water purification system. The water purification system comprises first and second mixing reactors, first and second flotation reactors and first and second filters all serially and fluidly connected in a flow direction of the water as well as an electrolyzer. During the process, electrochemical synthesis of the reagents takes place in the cathode and anode chambers of the electrolyzer, respectively. Moreover, the electrochemically synthesized catholyte and anolyte are dosed into the water kept in the first and second mixing reactors, respectively. Then the mixtures in the first and second mixing reactors are mixed. After that, the flow of the treated water leaving the mixing reactors is passed through the first and second flotation reactors and afterwards through the first and second filters downstream of the first and second mixing reactors.

A groundwater remediation system includes a capillary media supported and positioned such that it is partially submerged into a groundwater source to be remediated. Groundwater is drawn into the submerged portion of the capillary media and further into the non-submerged portion of the capillary material via natural capillary action. As the water evaporates from the non-submerged portion of the capillary media, the dissolved solids within the water precipitate onto the media leaving the precipitated solids for reclamation or disposal and allowing the cleaned water vapor to disperse into the ambient air. In some embodiments, heat may be added to the media, water, or air to accelerate the evaporative process.

An apparatus has a plurality of gas transfer membranes. The apparatus floats in water with the membranes submerged in the water. To treat the water, a gas is supplied to the membranes and is transferred to a biofilm supported on the membranes or to the water. Gas is also used to supply mixing or membrane scouring bubbles to the water. The mixing or scouring bubbles can be provided by a cyclic aeration or other gas supply system, which optionally provides gas at a variable pressure to the membranes in parallel or series with an aerator. Condensates can be removed from the membranes, and exhaust gasses from the membranes can be monitored, optionally through one or more dedicated pipes.