A method for treating wastewater is disclosed. The method is useful in particular for treating wastewater that is generated from the process of drilling, hydraulic fracturing and/or cleaning a bore of an oil or natural gas well bore. The method may include performing cold lime softening of the wastewater to form waste salt flocs, filtration of waste salt flocs, ozonation of the filtrate from the filtration, and reverse osmosis of the filtrate to produce a purified permeate.

A processing apparatus for treating acid mine wastewater using an activated carbon-loaded microorganism includes a purifying container, a reducing body and an oxygen consumption body. By arranging a fuel gas body, a bottom of a cover disc is in threaded connection with a top of a top pipe after red phosphorus in a bottom cylinder is ignited, air in a feeding chamber enters into the bottom cylinder through gas ports, the oxygen in the air is consumed as the red phosphorus continues to burn, such that an interior of a reaction bin is in an oxygen-free environment, for ease of the microorganism performing the biological reduction reaction on the acid mine wastewater.

Nuclear energy integrated hydrocarbon operation systems include a well site having a subsurface hydrocarbon well configured to produce a produced water output. The system further includes a deployable nuclear reactor system configured to produce a heat output. The system may further include a deployable desalination unit configured to produce a desalinated water output using the produced water output of the subsurface hydrocarbon well and the heat output of the deployable nuclear reactor. The system may further include a deployable off-gas processing system configured to produce an industrial chemical using the off-gas output of the subsurface hydrocarbon well and the heat output of the deployable nuclear reactor.

An exemplary power system utilizes turbines configured within a water intake conduit to the desalination processor to produce power for the desalination processor. Water intakes are configured to provide a natural flow of water to the desalination processor though hydrostatic pressure. One or more turbines coupled with the water intake conduits are driven and produce power for the system. The desalination processor incorporates Graphene filters to and may include a structured water system to increase the H3O2 concentration of the water prior to Graphene filters. Discharge water may be pumped back into the body of water but be separated from the intakes. A secondary power source, such as a renewable power source, may be used to produce supplemental power for the system. Power produced may be provided to a secondary outlet, such as a power grid, all above and/or underground.

Methods for clarifying water, reducing turbidity of water, and removing phosphate from water include adding a water treatment composition having an aluminum-containing coagulant, and a natural non-charged polysaccharide, such as guar. The aluminum-containing compound can include polyaluminum chloride, aluminum chlorohydrate, polyaluminum chlorohydrate, aluminum sulfate, sodium aluminate, polyaluminum sulfate, polyaluminum silicate chloride, polyaluminum silicate sulfate, or a combination thereof.

The disclosure relates to the use of ionic liquids as paraffin inhibitors, pour point depressant or cold flow improvers in the production, treatment and refining of hydrocarbon fluids.

A method for treating wastewater comprising subjecting a sulfate containing wastewater to Fe(III) iron dosing in an anaerobic bioreactor containing one or more of an iron reducing bacteria and one or more of a sulfate reducing bacteria, and one or more of a fermentative bacteria, and adjusting a dosage of the Fe(III) iron in the anaerobic bioreactor to achieve a Fe/Sulfate molar ratio that is equal to or greater than 0.50, and removing an effluent from the anaerobic bioreactor that is a treated wastewater. A wastewater treatment system is provided having a wastewater reservoir, a ferric iron solution reservoir, an anaerobic bioreactor, and an effluent reservoir.

A method for determining a water treatment plan for produced water includes receiving sample water analysis for the produced water, and receiving one or more key performance indicators (KPIs) that each indicate a selected treatment result for the produced water. In addition, the method includes providing the sample water analysis and the KPIs to a machine learning model and determining a water treatment plan for the produced water using the machine learning model, wherein the water treatment plan comprises one or more additives for the produced water that are to provide the produced water with the KPIs.

The invention relates to an electrodialysis device for the desalination of water for oil and gas applications comprising: a membrane stack comprising alternating cation- and anion-exchange membranes (2.1, 2.3) and a plurality of spacers (2.2, 2.4), each spacer being arranged between two successive membranes; wherein at least one of the spacers (2.2, 2.4) comprises a recessed area (3.2) and a non-recessed area (3.3), a central opening (3.1) within the recessed area (3.2); the spacer (2.2, 2.4) is provided with at least four orifices (3.4, 3.5) within the non-recessed area (3.3); and with respective channels (3.6) which connect at least two of the orifices (3.4) with the central opening (3.1); and one membrane (2.1, 2.3) is accommodated in the recessed area (3.2). The invention also relates to a water desalination process using the electrodialysis device mentioned above.

Methods and systems for carbon sequestration in conjunction with oil and gas operations. Carbon dioxide in the form of nanobubbles is used to supersaturate treated produced water. The supersaturated produced water is then injected into Class II injection wells for effective storage in underground formations in conjunction with enhanced recovery operations or the storage and disposal of produced water from production operations.