May 17, 2020

Hydropower Turbines to Protect Ecosystems

energy digital
Hydropower
Renewable Energy
Alden Fish-Fri
Admin
2 min
Alden's fish friendly, energy efficient turbines
A revolutionary new design in turbine technology for hydropower plants is almost ready for commercial deployment. The Alden Fish-Friendly Turbine has...

 

 

A revolutionary new design in turbine technology for hydropower plants is almost ready for commercial deployment. The Alden Fish-Friendly Turbine has stirred great expectations for nearly everyone in the industry, promising to reduce fish injury and mortality while effectively maintaining power production.

While hydropower currently accounts for only 7 percent of the nation's electricity generation, it has tremendous potential. As with most renewable forms of energy, however, the technology is still relatively new and has other obstacles to overcome before it becomes a commercially viable option. The industry's main challenge has been developing a turbine system that minimizes disruption to sensitive ecosystems and marine life. So far, bypass technologies have been employed to help fish pass through the system unharmed, but are expensive and require a significant amount of power.

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After over a decade of support from the Energy Department, scientists at the Electric Power Research Institute (EPRI) recently released the results of the first prototype test results of the Alden turbines. With a 98 percent survival rate for fish under 8 inches long and 99 percent survival rate for eel and sturgeon, the new turbines effectively maintain power production and are low enough in cost to give them significant export potential.

The EPRI is confident that these new designs will enable the ecologically-responsible development of thousands of megawatts of hydropower resources. However, the project still requires a three year demonstration and testing phase before it is ready for the market. If the results continue to hold true to the EPRI's findings, it has the potential to open hundreds of existing water power projects across the U.S.

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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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