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May 18, 2018·9 min read
Reverse Osmosis Is The Answer Recycling The Wastewater From Oil And Gas Industry

Reverse Osmosis Is The Answer! – Recycling The Wastewater From Oil And Gas Industry

Reverse Osmosis Is The Answer! – Recycling The Wastewater From Oil And Gas Industry

Quick Answer: Reverse osmosis plays a key role in oil and gas wastewater treatment, particularly for hydraulic fracturing flowback and produced water reuse. RO removes dissolved salts, hydrocarbons, and scaling ions to enable water reuse for drilling operations, reducing freshwater demand by 80-95% in water-recycling operations.

Reverse Osmosis sees a lot of applications in various fields. Not only is it used just for generating safe drinking water but also for generating required water profiles in industries and commercial businesses. The latest news suggests this process might now also have an application in helping out to recycle the wastewater formed by oil and gas industries.

The Oil & Gas Industry:

Worldwide, nearly 900 billion wastewater is generated by just Oil & Gas industry every year. Not only this contains various salts but also chemicals and pollutants that are deemed hazardous if they come in human contact. Currently, this is disposed of in wells which are deep underground so that they are as away from human touch and environment as possible. But, still, in certain parts of the world, its leakage to the surface is a problem. The industry is now looking forward to alternate ways of disposing of this in hopes of reducing costs. This can also be linked to the increased demand for water in drought-prone areas and the possible connection of these deep underground wells to earthquakes.

Alternate methods of disposal:

Air and Waste Management Association (AMWA) has a number of articles by scholars and experts that suggest that treating the wastewater and recycling it is the most viable options for getting rid of it. It is more feasible than underground wells that are posing to be a threat today. And one of the solutions to this is Hydraulic fracturing.

This is a water-intensive process that requires pressure to crack open obstacles in an oil well. Now, fracturing one such well requires 15 million gallons of water and for every barrel of oil produced 10 barrels of water go to waste. Therefore, recycling the waste product makes a good sense than just getting rid of it. This can help replace the demand for water needed for fracturing and relieving stress on local authorities to provide it, especially in drought-prone areas. Ideally, it can provide conventional and commercial feasibility that disposal wells cannot achieve.

This is a positive news, however, many are suggesting that the scope of this idea should not be taken beyond the field of oil and into crop irrigation. It usually contains higher TDS than any other supply and can pose a problem for farmers. This can be used but after careful treatment using seawater desalination technologies that will ensure safe water for watering cattle and irrigation purposes.

Reverse Osmosis in the picture:

This is a better option if one wishes to take the waste product in for recycling. However, the cost of this method is extremely high not to mention a number of reverse osmosis membranes that will have to be placed one after the other only to make sure not a drop on contaminant gets through. As mentioned before, the rejected product from Oil & gas industry is potentially radioactive and for it to be reused in agriculture, the cost of safety goes high up.

Studies have shown that even after the intricate process of purification, the resulting output shows signs of contaminants which is why the chance and risk is high. At a larger level, this option, therefore, cannot be undertaken until a better option comes along.

Recycling of the rejected product from the industry by hydraulic fracturing is the best idea we have today. But before extending its scope beyond the oilfields, the careful disclosure of the chemicals used, analysis, toxicity assessments and monitoring technologies are required. It has been concluded by experts all around the world that without making absolutely certain of these studies, undertaking using product water for nonindustrial purposes is highly risky and cost inhibitor.

Author’s Bio:
Ampac USA is a leading manufacturer of advanced reverse osmosis treatment systems. For over 30 years the company has been providing its customers and clients around the world solutions to their water treatment problems. With years of an impressive track record, Ampac strives to develop solutions to make reverse osmosis systems, advanced for improved quality and cost efficiency.

What flow rates are available for emergency water treatment?

AMPAC USA's emergency systems range from 1,500 GPD portable units to 50,000+ GPD trailer-mounted systems. Military-specification units are available for forward operating base deployment, producing potable water meeting EPA and WHO drinking water standards from virtually any source.

Are emergency RO systems suitable for disaster relief operations?

Yes. AMPAC USA's emergency systems are used by FEMA, the U.S. military, and international NGOs for disaster relief. They treat flood water, contaminated groundwater, and brackish sources, removing bacteria, viruses, and chemical contaminants to produce safe drinking water on-site.

What power sources can emergency water purification systems use?

AMPAC USA's emergency systems can run on generator power (120/240V or 480V 3-phase), solar panels with battery backup, or vehicle power take-off (PTO). Low-power models consume as little as 0.5 kW, making them viable for off-grid deployment.

How durable are military-grade water purification systems?

AMPAC USA's military systems are built to MIL-SPEC standards with stainless steel frames, powder-coated components, and UV-resistant materials. They are designed to operate in temperatures from -20°F to 120°F and are vibration-tested for transport in military vehicles.

Conclusion

This post highlighted how emergency and military-grade water purification systems provide safe drinking water rapidly in the most challenging field conditions. For organizations requiring deployable water treatment capability, AMPAC USA engineers portable and trailer-mounted systems built to perform wherever they are needed. Contact our team at [email protected] or (909) 548-4900 to discuss your emergency water treatment requirements.

RO-Based Treatment for Oil and Gas Produced Water

The oil and gas industry generates enormous volumes of wastewater — primarily produced water (water that comes to the surface with oil and gas) and hydraulic fracturing flowback water. The US alone generates approximately 900 million barrels (38 billion gallons) of produced water annually, according to the Groundwater Protection Council. This water contains high TDS (often 10,000-300,000 mg/L), dissolved organics including BTEX compounds (benzene, toluene, ethylbenzene, xylenes), naturally occurring radioactive materials (NORM), and scaling ions including calcium, barium, strontium, and silica. Historically, the primary disposal method was Class II underground injection wells, but increasing water scarcity, disposal costs, and induced seismicity concerns have driven rapid adoption of produced water recycling and treatment technologies.

Reverse osmosis is central to the treatment train for produced water destined for reuse or discharge. However, the extremely high TDS and complex chemistry of oilfield brines presents significant membrane challenges: conventional thin-film composite polyamide membranes can be damaged by residual oil and high salinity. Pre-treatment for oil removal (induced gas flotation, hydrocyclones, walnut shell filters, ceramic membranes) is essential before RO. Specialized high-pressure RO systems for produced water operate at 600-1,500 PSI, using fouling-resistant membrane elements and aggressive cleaning protocols. For the highest TDS streams (>50,000 mg/L), thermal desalination (mechanical vapor recompression, brine crystallizers) may be required to achieve zero-liquid discharge (ZLD).

AMPAC USA designs customized produced water treatment systems ranging from mobile trailer-mounted units for field deployment to large-scale stationary facilities. Modular system design allows capacity scaling as production volumes change. Integrated control systems track water quality parameters continuously, enabling operators to optimize treatment chemistry in response to changing produced water composition — a critical feature given the high variability of oilfield brine chemistry.

Frequently Asked Questions

Q: What is produced water in the oil and gas industry?

A: Produced water is water that comes to the surface mixed with oil and gas during extraction. It is the largest waste stream by volume in oil and gas production, containing dissolved salts (high TDS), hydrocarbons, heavy metals, naturally occurring radioactive materials, and scale-forming ions.

Q: How does reverse osmosis treat oilfield produced water?

A: RO removes dissolved salts and many dissolved organics through membrane filtration. However, extensive pre-treatment (oil removal, solids removal, antiscalant dosing) is required before produced water contacts RO membranes. Multiple stages of increasing pressure and selectivity are often needed for high-TDS produced water.

Q: What is the TDS of typical produced water?

A: Produced water TDS ranges enormously depending on the formation — from 1,000 mg/L in some water-flood enhanced recovery operations to over 300,000 mg/L in deep, tight formation brines. Hydraulic fracturing flowback water is typically 5,000-150,000 mg/L TDS.

Q: What is zero-liquid discharge (ZLD) in produced water treatment?

A: ZLD is a treatment approach that eliminates all liquid waste streams by concentrating brines to the point of solid salt crystallization. It requires a combination of RO, thermal evaporation, and crystallizer technology. ZLD is the most complete solution for areas where water reuse and injection are both constrained.

Q: Why is produced water reuse important for the fracking industry?

A: Hydraulic fracturing requires 3-10 million gallons of water per well. In water-scarce regions like the Permian Basin, freshwater availability limits operations. Treating and recycling produced water reduces freshwater demand by 80-95% and disposal costs, while addressing regulatory scrutiny of disposal well seismicity.

Q: What contaminants must be removed from produced water before RO treatment?

A: Before RO, produced water treatment must remove suspended solids, free and emulsified oil (using flotation, hydrocyclones, ceramic membranes), iron and manganese (oxidation and filtration), hardness scaling ions (softening or antiscalant dosing), and hydrogen sulfide. Without these pre-treatment steps, RO membranes foul within hours.

Q: How does mobile produced water treatment work?

A: Mobile treatment units mounted on trailers or containerized skids can be deployed to remote well sites, sized for 5,000-100,000 barrels per day of produced water. Modular design allows capacity scaling. AMPAC USA mobile units include all pre-treatment, RO, and post-treatment in a self-contained, generator-compatible package.

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