Artemis Water Strategy

Water resilience for a thirsty future

In Fracking’s Wake

The following appeared in the Wall Street Journal on September 11, 2011

By YULIYA CHERNOVA

[H2O] Joe Duty
BY THE TRUCKLOAD With fracking’s growth, tankers unloading wastewater keep a Texas recycling site busy

The growing volume of dirty water produced in shale-gas drilling has triggered a gold rush among water-treatment companies.

Energy companies increasingly are drilling for natural gas using hydraulic fracturing, or fracking. In this process, water mixed with sand and chemicals is pumped into a well under high pressure; the mixture fractures the rock, allowing the gas to escape. Huge amounts of water are used, and about 10% to 40% of it emerges after a frack job, laced with a variety of contaminants.

Even as the volume of dirty water grows, the traditional methods of disposal are narrowing. Several states are considering or have recently imposed limits on wastewater disposal underground or in streams. Meanwhile, record drought in some drilling areas is making access to fresh water for drilling more difficult, costly and unpopular.

The net result: “For the first time there’s a strong driver for technology” to clean up the wastewater from mines so it can be reused, says Laura Shenkar, founder of  Artemis Water Strategy, a water-technology consulting firm. Dozens of water-treatment companies have started up in the past year or so, and many of the more established companies are adapting their techniques for use in the shale-gas industry. How many of those companies the market can support remains to be seen.

Plenty of Options

Companies are using several different approaches to shale-gas wastewater treatment.

[H2O2online]

Ecosphere Technologies Inc., based in Stuart, Fla., is one of the dominant providers of water treatment for the shale-gas industry, according to Lux Research, a technology research and consulting firm. The company’s technology avoids the use of chemicals typically employed to treat wastewater.

Ecosphere’s process forces dirty water through pipes where ozone breaks down contaminants with the help of sound waves, electrically charged particles and changes in pressure. No waste is created in the process, because while the technology renders contaminants harmless it doesn’t filter anything out.

Another strong competitor for new business, according to Lux analyst Brent Giles, is WaterTectonics Inc., based in Everett, Wash. The company uses a process called electric coagulation, in which an electric charge forces contaminant particles into clumps that can be removed after they either rise to the surface of the water or sink to the bottom. The process avoids the use of chemicals, but it does produce waste that has to be disposed of.

Another company, Altela Inc., based in Albuquerque, N.M., earned a spot on Artemis Project’s 2011 list of the 50 most innovative water-technology companies in the U.S. Its technology mimics rainmaking. Wastewater is heated to the point of evaporation, which produces clean water in the form of vapor, leaving contaminant particles behind. The vapor is then condensed back into liquid form.

The basic process, called thermal distillation, isn’t new, but Altela has found a way to make it more efficient, by capturing the heat generated by condensation and using it for evaporation. Ned Godshall, the company’s chief executive, says Altela’s method uses a third of the energy typically required for conventional thermal distillation.

Do It Yourself

One potential drag on the use of all these technologies: Some drillers have started to simply reuse their wastewater without fully treating it. But it isn’t clear how much of a factor that will be. Many technology companies and some researchers argue that there is a limit to such recycling because it doesn’t clean the water enough for it to be used repeatedly and still be effective. The particles in dirty water can damage equipment and block the release of gas from the shale.

“When I learned in early 2010 that they were going to recycle, I thought they were going to do a real heavy-duty treatment” before reusing the water, says John Veil, who analyzed water treatment for the oil and gas industry for many years at the Argonne National Laboratory, and now does so at his own consulting firm. “They are not. All they are doing is getting out the big sand grains in a [filtering] process as simple as pouring the water through pantyhose.”

Ms. Chernova is a special writer for Dow Jones VentureWire in New York. She can be reached at yuliya.chernova@dowjones.com.

In Fracking’s Wake

The following appeared in the Wall Street Journal

By YULIYA CHERNOVA

[H2O] Joe Duty
BY THE TRUCKLOAD With fracking’s growth, tankers unloading wastewater keep a Texas recycling site busy

The growing volume of dirty water produced in shale-gas drilling has triggered a gold rush among water-treatment companies.

Energy companies increasingly are drilling for natural gas using hydraulic fracturing, or fracking. In this process, water mixed with sand and chemicals is pumped into a well under high pressure; the mixture fractures the rock, allowing the gas to escape. Huge amounts of water are used, and about 10% to 40% of it emerges after a frack job, laced with a variety of contaminants.

Even as the volume of dirty water grows, the traditional methods of disposal are narrowing. Several states are considering or have recently imposed limits on wastewater disposal underground or in streams. Meanwhile, record drought in some drilling areas is making access to fresh water for drilling more difficult, costly and unpopular.

The net result: “For the first time there’s a strong driver for technology” to clean up the wastewater from mines so it can be reused, says Laura Shenkar, founder of  Artemis Water Strategy, a water-technology consulting firm. Dozens of water-treatment companies have started up in the past year or so, and many of the more established companies are adapting their techniques for use in the shale-gas industry. How many of those companies the market can support remains to be seen.

Plenty of Options

Companies are using several different approaches to shale-gas wastewater treatment.

[H2O2online]

Ecosphere Technologies Inc., based in Stuart, Fla., is one of the dominant providers of water treatment for the shale-gas industry, according to Lux Research, a technology research and consulting firm. The company’s technology avoids the use of chemicals typically employed to treat wastewater.

Ecosphere’s process forces dirty water through pipes where ozone breaks down contaminants with the help of sound waves, electrically charged particles and changes in pressure. No waste is created in the process, because while the technology renders contaminants harmless it doesn’t filter anything out.

Another strong competitor for new business, according to Lux analyst Brent Giles, is WaterTectonics Inc., based in Everett, Wash. The company uses a process called electric coagulation, in which an electric charge forces contaminant particles into clumps that can be removed after they either rise to the surface of the water or sink to the bottom. The process avoids the use of chemicals, but it does produce waste that has to be disposed of.

Another company, Altela Inc., based in Albuquerque, N.M., earned a spot on Artemis Project’s 2011 list of the 50 most innovative water-technology companies in the U.S. Its technology mimics rainmaking. Wastewater is heated to the point of evaporation, which produces clean water in the form of vapor, leaving contaminant particles behind. The vapor is then condensed back into liquid form.

The basic process, called thermal distillation, isn’t new, but Altela has found a way to make it more efficient, by capturing the heat generated by condensation and using it for evaporation. Ned Godshall, the company’s chief executive, says Altela’s method uses a third of the energy typically required for conventional thermal distillation.

Do It Yourself

One potential drag on the use of all these technologies: Some drillers have started to simply reuse their wastewater without fully treating it. But it isn’t clear how much of a factor that will be. Many technology companies and some researchers argue that there is a limit to such recycling because it doesn’t clean the water enough for it to be used repeatedly and still be effective. The particles in dirty water can damage equipment and block the release of gas from the shale.

“When I learned in early 2010 that they were going to recycle, I thought they were going to do a real heavy-duty treatment” before reusing the water, says John Veil, who analyzed water treatment for the oil and gas industry for many years at the Argonne National Laboratory, and now does so at his own consulting firm. “They are not. All they are doing is getting out the big sand grains in a [filtering] process as simple as pouring the water through pantyhose.”

Ms. Chernova is a special writer for Dow Jones VentureWire in New York. She can be reached at yuliya.chernova@dowjones.com.

Desalitech Reduces Costs of Desalination

Middelgrunden Windmills Outside Copenhagen
Efficient desalination can utilize alternative energy, like these Danish windmills, thus relying on the ocean twice. / Photo: andjohan on Flickr

The most common question I field when I mention desalination is, “Doesn’t that take a lot of energy?”

The truth is, yes, it does. That’s why you’ll not hear me advocate for desalination without strongly insisting on complementary conservation.

We must redouble our conservation efforts by upgrading infrastructure intelligently and in no way excuse wasteful water practices by pointing to the plentiful, historical ingredients of desalination: oceans of water and oceans of coal.

Each barrel of freshwater extracted from the ocean has costs, so we should use the water as efficiently as possible, recycling it and then remediating it into the water cycle.

Yet, conservation alone isn’t going to meet our water needs. The world’s population is expected to increase by 2.5 billion over the next 30 – 40 years, while the current, natural water cycle is not expected to increase its output.

Just as we must increase conservation, we must prepare for the impending water plateau by increasing our capacity to produce fresh water.

Hence my excitement in June when I heard about Desalitech’s successful pilot.The test purified Mediterranean saltwater, using Desalitech’s proprietary Closed-Circuit Desalination saltwater reverse osmosis method (SWRO-CCD).

Using common components, without energy recovery, running a high-pressure pump at 81% mean efficiency and circulation pump at 37.5% mean efficiency, the pilot achieved 48% recovery at 2.05 – 2.40 kWh per cubic meter of fresh water. For comparison, Perth’s desalination plant using Energy Recovery from ERI achieves 43% recovery at 2.32 kWh/m3.

Desalitech aims to increase the mean efficiency of the off-the-shelf, high-pressure pump to 88%, to provide recovery at 1.75 – 1.95 kWh/m3 on Mediterranean saltwater. The same pumps used on ocean water could produce equal recovery at 1.5 – 1.7 kWh/m3.

Desalitech’s implementation reduces the cost of powering desalination processes. It also decreases capital expenditures. Nadav Efraty, CEO of Desalitech, told me, “This technology is reducing energy consumption by up to 50% when we utilize about twice the membranes, reduces energy by about 10-15% when we use only 40% of the membranes compared to a conventional plant, or reduces energy about 30% when we utilizes the same amount of membranes, but in this mode, since we don’t utilize any form of energy recovery, we still see a reduction in capital expenditures.”

Even with less than half the membranes, the technology still sees 10-15% energy reduction. That’s a 60% savings on capital expenditures for membranes.

As an added element of efficiency, plants utilizing Desalitech’s technology can turn plants up and down depending on demand: Nadav explained, “The very same unit can operate at very high production rates part of the day (when power rates are low for example) and in extremely low energy consumption the rest of the day.”

Desalitech does this by independently controlling component flow rates, recovery, pressures and cross flow irrespective of the other variables.

Following their successful pilot, Desalitech is addressing brackish water. Desalitech’s three BWRO installations are fully operational facilities, capable of producing 10,000 m3 fresh water per day.

 

Engineers Turn Water Contaminant into Fuel

 

Aerial Top Dusting Is a Leading Cause of Water Contamination from Nitrates
Aerial top-dusting is a leading cause of water contamination / Photo: tjmartins on flickr

Researchers in Delaware are worried by high levels of nitrates recently discovered in groundwater and drinking water. A recent study found 76% of domestic wells contained nitrates. 18% of the wells exceed federal standards for drinking water.

Even some deep wells are affected, leading Delaware’s Department of Natural Resources to conclude that surface contaminants are penetrating natural barriers, meaning “ground-water quality in a significant fraction of confined aquifer wells is susceptible to human activities.

“Nitrates reach surface waters and groundwaters via septic systems, stormwater runoff and fertilizers used at farms, homes and businesses including golf courses. Nitrates threaten pregnant mothers, children and, in sufficient concentrations, nitrogen-rich waters precipitate eutrophication, contributing to dead-zones like in the Gulf of Mexico.

Nitrates that don’t directly enter surface waters and groundwaters are typically removed from the wastestream at wastewater treatment plants, either via efficient processes like Ostara’s Nutrient Removal Technology (which removes nitrogen in the from of NH3, aka ammonia) or via energy intensive processes utilizing aerobic bacteria.

But now a couple of rocket scientists and a waste expert from Stanford have devised a way to safely and efficiently dispose of nitrates while powering wastewater treatment plants without an external energy source.

Greenhouse Gases as Resources

Rocket Engine via Stanford
Rocket Engines Burning Nitrous Oxide produce pure Nitrogen and Oxygen / Photo: Brian Cantwell at Stanford

As we’ve discussed previously, wastewater treatment processes utilizing aerobic bacteria require energy intensive aeration in order to operate (up to half of operating costs). Anaerobic bacteria require much less energy, but convert nitrates into nitrous oxide – a greenhouse gas 300 times more potent than C02 – and Natural Gas in the form of a methane biogas.

The scientists, Craig Criddle, Brian Cantwell, and Yaniv Scherson, have decided excess gases aren’t such a bad thing. In fact, they want to utilize produced Natural Gas to power wastewater treatment plants off-the-grid, enabling plants to be placed in areas without a reliable energy supply. The plants could recycle fresh water for water–stressed regions.

What happens to the nitrous oxide is equally remarkable.The nitrous oxide is burned off in a small rocket engine. Says Cantwell, “When it decomposes, nitrous oxide breaks down into pure nitrogen and oxygen gas. At the same time, it releases enough energy to heat an engine to almost 3,000 degrees Fahrenheit, making it red hot, and it shoots out of the engine at almost 5,000 feet per second, producing enough thrust to propel a rocket.”

To propel a rocket, or, put to better use, to generate electricity.The scientists’ plan harvests resources commonly occurring in wastewater. “For too long we’ve thought of treatment plants as places where we remove organic matter and waste nitrogen,” Criddle said. “We need to view these wastes as resources, not simply something to dispose of.”

Saving Money while Saving the World

In the developed world, the technology could produce wastewater treatment plants with low emissions (some natural gas will be emitted when combusted).

That’s important because wastewater treatment plants accounted for 4.9 TgCO2 equivalents of nitrous oxide in the US in 2008 (equivalent to 4.9 million metric tons of C02).

When you utilize instead of emitting the methane produced by wastewater treatment, which reached 24.3 TgCO2 in 2008, and eliminate expenditures and emissions from energy used to power aerators, you begin to see the scale of potential energy, emissions and cost savings.

It’s a remarkable advance: a self-sufficient, low-emission wastewater treatment plant that produces nitrate-free fresh water, thereby protecting water’s end-users: aquatic and human life.

Via PhysOrg / Stanford

 

MIT Natural Gas Report Glosses Over Environmental Issues

Editor’s note: The energy exploration industry is the first to demand advanced water technology for economic reasons: water efficiency during hydraulic fracturing means cost savings. Advances in on-site water treatment for energy exploration will drive down costs for the technology to a point where it can be implemented in break-even or non-profitable situations, like personal housing and small to medium-size businesses, where demand will grow as current water infrastructure decays. Vikram Rao and peers will present on topics surrounding water use in energy exploration at an upcoming Artemis Project webinar.

MIT’s most recent report on energy is on the Future of Natural Gas, following similar reports on coal and nuclear energy.  It is co-edited by Ernest Moniz and Tony Meggs.  The latter recently left BP as CTO.  As reported in Forbes recently, the report emphasizes the role of shale gas in enabling natural gas substitution of coal.  The authors see this as a transitional strategy for a low carbon future.  We agree with that and have expressed similar ideas in the Directors Blog.

However, the report is surprisingly shy about discussing the environmental issues seen as facing shale gas exploitation.  While we believe these are indeed tractable, they merit much more discussion than they were given.  Accordingly we repair some of that omission here.The most significant issues center on three matters:  fresh water withdrawals, flow back water and collateral issues, and produced water handling and disposal. [Read more…]

CONTACT

info@theartemisproject.com
+1-415-751-0100
1016 Lincoln Blvd., The Presidio,
San Francisco, California 94129

LOGIN

Client Login

LEARN

SEARCH