May 17, 2020

Green Float: Floating Cities by 2025?

energy digital
Green Float
Shimizu
Japanese floating citi
Admin
2 min
Japanese scientists are working on a concept to build carbon-neutral, self-sufficient floating cities
Japanese firm Shimizu has a startling new concept: mini floating, carbon-neutral cities that drift across the Pacific on giant water lilies. The Green...

 

Japanese firm Shimizu has a startling new concept: mini floating, carbon-neutral cities that drift across the Pacific on giant water lilies. The Green Float concept includes a number of cells that could house between 10,000 to 50,000 people.

The cells, each about 1 kilometer wide, could float freely or attach onto other cells to form larger towns, cities or even countries. At the center of each cell, a 1 kilometer high “City in the Sky” skyscraper would house the majority of residents, made from light alloys from the metal deriving from magnesium in sea water.

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Grasslands and forests would be plentiful around each pod, essentially becoming self-sufficient in terms of food with farming and livestock throughout the 'plains.'

The creative concept Shimizu has dreamed up would potentially cut carbon emissions by 40 percent, scientists claim. Each cell would convert waste back into energy using the latest green technologies, and even collect islands of floating waste to harvest more energy.

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Of course, the cities would have to float in waters guarded from extreme weather and tidal waves—ideally near the equator. Strong elastic membranes standing 30 feet above sea level would surround the cells to protect inhabitants from large waves. Sea walls as high as 100 feet could also be constructed, creating cities that are arguably more equipped to handle tsunamis than most coastal areas.

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Too outlandish? Not according to Shimizu scientists, who are actually proposing to develop the first cells by as soon as 2025. They're not only working on the technologies to make it happen, but even thinking up new ways to collect solar energy on earth by encircling the moon with a belt of solar collectors.

 

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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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