May 17, 2020

U.S. Energy Policy's Hidden Water Costs

energy digital
Energy Policy
water
water costs
Admin
6 min
How water intensive is energy?
Huge demands on increasingly scarce water are a major hidden cost of a “business as usual” approach to American electricity generation th...

 

 

Huge demands on increasingly scarce water are a major hidden cost of a “business as usual” approach to American electricity generation that needs to be more fully understood by policymakers and the public, according to a new Synapse Energy Economics, Inc. report prepared for the nonprofit and nonpartisan Civil Society Institute (CSI) and the Environmental Working Group (EWG).

The new analysis, “The Hidden Costs of Electricity: Comparing the Hidden Costs of Power Generation Fuels,” is available online at http://www.CivilSocietyInstitute.org. Six fuels used to generate electricity --- biomass, coal, nuclear, natural gas, solar (photovoltaic and concentrating solar power), and wind (both onshore and offshore) – are analyzed in the following categories: water impacts, climate change impacts, air pollution impacts, planning and cost risk, subsidies and  tax incentives, land impacts, and other impacts.

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Examples of the water-related findings in the report include the following:

* Nuclear power has critical cooling requirements that require huge amounts of water. Roughly 62 percent of U.S. nuclear plants have closed-loop cooling systems. Reactors with closed-loop systems withdraw between 700-1,100 gallons of water per megawatt hour (MWh) and lose most of that water to evaporation. Water withdrawals are even higher at open-loop cooled nuclear plants, which need between 25,000-60,000 gallons per MWh. Most of the water is returned, but at a higher temperature and lower quality.

* In addition to fouling streams and drinking water through mining and coal-ash dump sites, coal-fired power relies heavily on closed-loop cooling systems which withdraw between 500 and 600 gallons of water per MWh and lose most of this via evaporation. Withdrawals for open-looped cooled coal-fired power plants are between 20,000-50,000 gallons per MWh. Most of the water is returned, but at a higher temperature and lower quality.

* Under a so-called “Clean Energy Standard,” biomass would become a much larger source of U.S. electricity generation; however, biomass also requires vast amounts of water. The report notes that a typical 50 megawatt (MW) biomass plant could withdraw roughly 242 million gallons of water per year and lose most of this. Adding 10 of these plants in a region would use 2.42 billion gallons of water per year. For dedicated energy crops, water use for irrigation can be considerable. One study estimates water use for most crops between 40,000 and 100,000 gallons per MWh, with some crops exceeding this range.

* In 2010, EPA estimated that fracking shale wells can use anywhere from two to 10 million gallons of water per well. The water is often extracted from on-site surface or groundwater supplies. Such huge water withdrawals raise serious concerns about the impacts on ecosystems and drinking water supplies, especially in areas under drought conditions, areas with low seasonal flow, locations with already stressed water supplies, or locations with waters that have sensitive aquatic communities.

* By contrast, wind and solar photovoltaic power requires little water in the electricity generation process. Concentrating solar power requires water for cooling purposes, but new technologies are placing greater emphasis on dry cooling. Solar power plants with dry cooling use only around 80 gallons per MWh – about a tenth of the low-end estimate for nuclear power and one-sixth of the low end estimate for coal-fired power generation.

Grant Smith, senior energy analyst, Civil Society Institute, said: “The government and energy industries are literally flying blind as they plan for continued reliance on coal, natural gas, nuclear power and industrial biomass to meet our energy needs. Each of these is water intensive and leads to pollution of water, which is increasingly scarce and in competition for other uses such as agriculture and other commercial uses. The drought intensifies the urgency and the imperative that political leaders in both parties hit the pause button on the headlong rush to support nuclear power and fossil fuel use.”

Seth Sheldon PhD, CSI lead water/energy analyst, added: “In 2005 the Congress mandated a federal water/energy roadmap. Nearly eight years later, that roadmap has not been produced and either through bureaucratic inertia or fear of hard political questions, the questions are not even being asked, much less their solutions explored. At a time of significant water scarcity and increasing threats to water quality, we can ill afford to ignore this central question about the future of our energy choices.”

Dusty Horwitt, senior counsel, Environmental Working Group, said: “The rush to drill for shale gas is one of the best recent examples of how the costs of water pollution are ignored in the pursuit of supposedly cheap energy. When New York regulators estimate a price tag of $8-10 billion to build a water treatment plant for New York City if shale gas drilling contaminates its upstate water supply, it raises serious questions about whether shale gas really is so cheap and why water costs aren’t always considered from the start.”

Geoff Keith, senior associate, Synapse Energy Economics Inc., said:  “Too often left out of the equation are a number of important ‘hidden’ costs, also called ‘indirect’ or ‘externalized’ costs, associated with each generation technology. These include costs to society such as depletion of water and other resources, air and water pollution, detrimental impacts on human health and the environment, and contributions to global climate change. While direct costs (the monetary cost to build and operate a generating plant) are important to consumers, so too are these indirect costs, whether or not they can be easily expressed in monetary terms.”

Other water-related data highlighted in the report includes the following:

* The full picture for nuclear power water use may be even more dramatic. Estimates of lifecycle water use for three European reactors range from 2,600 to 6,900 gallons per MWh, not including cooling water use. (This compares with a lifecycle analysis of a parabolic trough solar thermal power plant at 1,240 with wet cooling and just 290 gallons per MWH for dry cooling.)  In addition, nuclear wastewater production ranges from 6.3 to 7.4 gallons per MWh.

* Coalbed methane recovery of natural gas depletes ground water: one estimate puts total groundwater removed between 1997 and 2006 at an astounding 172 billion gallons.

* Estimates of the lifecycle water withdrawals from wind projects, including both onshore and offshore projects, range from just 55 to 85 gallons per MWh.

ABOUT THE GROUPS

Based in Newton, MA, the nonprofit and nonpartisan Civil Society Institute (http://www.CivilSocietyInstitute.org) is a think tank that serves as a catalyst for change by creating problem-solving interactions among people, and between communities, government and business that can help to improve society. Since 2003, CSI has conducted more than 25 major national and state-level surveys and reports on energy and auto issues, including vehicle fuel-efficiency standards, consumer demand for hybrids/other highly-fuel efficient vehicles, global warming and renewable energy. In addition to being a co-convener of TheCLEAN.org (http://www.TheClean.org), the Civil Society Institute also is the parent organization of the Hybrid Owners of America (http://www.HybridOwnersofAmerica.org).

EWG is a nonprofit research organization based in Washington, D.C. that uses the power of information to protect human health and the environment. http://www.ewg.org.

Synapse Energy Economics, Inc. (http://www.synapse-energy.com/) provides research, testimony, reports and regulatory support on energy, economic, and environmental topics. Synapse has a professional staff of 22 with more than 300 years of combined experience in the electricity and natural gas industries. Synapse assesses the implications of electricity and natural gas industry planning, regulation and restructuring. Their work covers various interrelated issues such as transmission planning, service reliability, siting, fuel diversity, resource planning, financial and economic risks, renewable energy potential and renewable portfolio standards, energy efficiency, electricity modeling, portfolio management, customer service and more. Synapse works for a wide range of clients throughout the United States, including attorneys general, offices of consumer advocates, public utility commissions, a variety of environmental groups, foundations, the U.S. Environmental Protection Agency,

Department of Energy, Department of Justice, the National Association of Regulatory Utility Commissioners, and others.

 

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Oct 19, 2020

Itronics successfully tests manganese recovery process

cleantech
manganese
USA
Scott Birch
3 min
Nevada firm aims to become the primary manganese producer in the United States
Nevada firm aims to become the primary manganese producer in the United States...

Itronics - a Nevada-based emerging cleantech materials growth company that manufacturers fertilisers and produces silver - has successfully tested two proprietary processes that recover manganese, with one process recovering manganese, potassium and zinc from paste produced by processing non-rechargeable alkaline batteries. The second recovers manganese via the company’s Rock Kleen Technology.

Manganese, one of the four most important industrial metals and widely used by the steel industry, has been designated by the US Federal Government as a "critical mineral." It is a major component of non-rechargeable alkaline batteries, one of the largest battery categories sold globally.

The use of manganese in EV batteries is increasing as EV battery technology is shifting to use of more nickel and manganese in battery formulations. But according to the US Department of Interior, there is no mine production of manganese in the United States. As such, Itronics is using its Rock Kleen Technology to test metal recoverability from mine tailings obtained from a former silver mine in western Nevada that has a high manganese content. 

In a statement, Itronics says that its Rock Kleen process recovers silver, manganese, zinc, copper, lead and nickel. The company says that it has calculated – based on laboratory test results – that if a Rock Kleen tailings process is put into commercial production, the former mine site would become the only primary manganese producer in the United States.

Itronics adds that it has also tested non-rechargeable alkaline battery paste recovered by a large domestic battery recycling company to determine if it could use one of its hydrometallurgical processes to solubilize the manganese, potassium, and zinc contained in the paste. This testing was successful, and Itronics was able to produce material useable in two of its fertilisers, it says.

"We believe that the chemistry of the two recovery processes would lend itself to electrochemical recovery of the manganese, zinc, and other metals. At this time electrochemical recovery has been tested for zinc and copper,” says Dr John Whitney, Itronics president. 

“Itronics has been reviewing procedures for electrochemical recovery of manganese and plans to move this technology forward when it is appropriate to do so and has acquired electro-winning equipment needed to do that.

"Because of the two described proprietary technologies, Itronics is positioned to become a domestic manganese producer on a large scale to satisfy domestic demand. The actual manganese products have not yet been defined, except for use in the Company's GOLD'n GRO Multi-Nutrient Fertilisers. However, the Company believes that it will be able to produce chemical manganese products as well as electrochemical products," he adds.

Itronics’ research and development plant is located in Reno, about 40 miles west of the Tesla giga-factory. Its planned cleantech materials campus, which will be located approximately 40 miles south of the Tesla factory, would be the location where the manganese products would be produced.

Panasonic is operating one of the world's largest EV battery factories at the Tesla location. However, Tesla and other companies have announced that EV battery technology is shifting to use of nickel-manganese batteries. Itronics is positioned and located to become a Nevada-0based supplier of manganese products for battery manufacturing as its manganese recovery technologies are advanced, the company states.

A long-term objective for Itronics is to become a leading producer of high purity metals, including the U.S. critical metals manganese and tin, using the Company's breakthrough hydrometallurgy, pyrometallurgy, and electrochemical technologies. ‘Additionally, Itronics is strategically positioned with its portfolio of "Zero Waste Energy Saving Technologies" to help solve the recently declared emergency need for domestic production of Critical Minerals from materials located at mine sites,’ the statement continues.

The Company's growth forecast centers upon its 10-year business plan designed to integrate its Zero Waste Energy Saving Technologies and to grow annual sales from $2 million in 2019, to $113 million in 2025.

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