A variable oil field fluid treatment system and method of use which utilizes a pump, a desanding hydrocyclone, and/or a non-consumable or consumable mechanical solids filter, a membrane filtration unit, a pump, a granular carbon filter, and/or combinations therein.

Produced water from a crude oil or natural gas production process is purified using a membrane purification system for petroleum production, agricultural, commercial and domestic uses. The produced water is pretreated to remove, at least, particulates and oil from the produced water. The minimally pretreated water is then purified in a membrane purification system, that is operated at conditions such that membrane scaling is reduced or prevented. In particular, the membrane purification system is operated to maintain the turbidity of clarified water feed to the system or intermediate aqueous streams that are cascading through the membrane purification system. Ensuring that the turbidity of the reject streams generated in the membrane system are useful in achieving long membrane operating life.

A reverse osmosis system includes a membrane housing comprising a reverse osmosis membrane therein. The membrane housing comprising a feed fluid inlet, a brine outlet and a permeate outlet. A first turbocharger has a first pump portion and a first turbine portion. The brine outlet is coupled to a first pipe directing a first portion of brine to the first pump portion. The first pump portion is in fluid communication with the feed fluid inlet. A feed pump communicates feed fluid to the feed fluid inlet through the first turbine portion. The brine outlet is coupled to a second pipe directing a second portion of brine toward a drain through a brine control valve.

This disclosure provides a water purification system for recovery of purified water from liquid wastewater. The liquid wastewater is converted to a contaminated gas stream using a water distillation technique. The contaminated gas stream is passed through a gas phase photolytic oxidation reaction chamber. An ultraviolet (UV) source in the gas phase photolytic oxidation reaction chamber exposes the contaminated gas stream to UV radiation to remove various contaminants in the gas phase and/or biological pathogens. The gas phase photolytic oxidation reaction chamber forms a purified gas stream from the contaminated gas stream, where the purified gas stream contains water vapor and is substantially free of contaminants. In some embodiments, an ionomer membrane may be placed downstream of a source of the liquid wastewater and upstream of the gas phase photolytic oxidation reaction chamber to treat the contaminated gas stream prior to UV exposure.

Process steps for monitoring the performance of a wastewater treatment system having a series of filtration units and optionally one or more disinfection units, controlling the operation of the filtration units, and controlling the operation of one or more maintenance operations that can be performed on the filtration units as a result of the monitoring. The wastewater treatment system can be operated without breaking pressure between the filtration units. Monitoring the performance of the wastewater treatment system can include using the water quality at various points in the system as an indicator of clogging or integrity issues within the filtration units. Sensors can be configured to measure properties of wastewater both upstream and downstream of each filtration unit, and the measured properties can be used to determine whether the filtration unit is performing adequately.

A method for producing an ethanol solution includes obtaining, from a starting liquid, a liquid feed having less than by weight of constituents and having 3% to 25% by weight of ethanol, supplying the liquid feed to a feed stream inlet of a reverse osmosis separation system having a first pass, wherein (i) each pass has an reverse osmosis membrane filtration unit, each membrane filtration unit having an ethanol rejection percentage of between 50% to 99%, and (ii) each pass has the feed stream inlet for a feed stream, a permeate stream outlet for a permeate stream, and a retentate stream outlet for a retentate stream, operating the system to maintain pressure in one of the membrane filtration units in a range of 1,200 to 4,000 psi, and obtaining retentate that is enriched with ethanol, the retentate differs from the starting liquid by absence of the removed constituents.

The invention relates to methods of production of a silica concentrate from geothermal fluids. More particularly, although not exclusively, the invention relates to the production of a colloidal silica concentrate, colloidal silica or precipitated silica from high temperature geothermal fluids by ultrafiltration to produce size-specific silica colloids and step-wise concentration of silica to avoid precipitation or gelling.

A reverse osmosis system includes a membrane housing comprising a reverse osmosis membrane therein. The membrane housing comprising a feed fluid inlet, a brine outlet and a permeate outlet. A first turbocharger has a first pump portion and a first turbine portion. The brine outlet is coupled to a first pipe directing a first portion of brine to the first pump portion. The first pump portion is in fluid communication with the feed fluid inlet. A feed pump communicates feed fluid to the feed fluid inlet through the first turbine portion. The brine outlet is coupled to a second pipe directing a second portion of brine toward a drain through a brine control valve.

The invention relates to a system and method of use for concentrating a solution that is eluted from an ion exchange process (elution solution) during an ion exchange regeneration using the osmotic pressure of the salt saturator. This method recovers solvent from the elution solution that could be used in a future ion exchange regeneration process. The concentration of the elution solution may include the precipitation and removal of solids from the elution solution.

The water dispensing device of the present invention with the given flow path of water and the control circuit configured store at least two threshold TDS values X.sub.A and X.sub.B, wherein X.sub.A is a higher TDS value than X.sub.B; and to drain water from the treatment unit through the drain line, when TDS value sensed is higher than X.sub.A, and alternately when the sensed value of TDS is less than X.sub.B then direct water from the reject line into the first recycle line; it was seen that the TDS of the output water of the device was in a constant range and the device of the present invention also contributed to minimizing the wastage of water by allowing recycling of water through the reject line of the treatment unit.