A process for two phase vacuum extraction of contaminants from the ground involves vacuum withdrawal of liquid and gaseous phases as a common stream, separation of the liquid and gaseous phases, and subsequent treatment of the separated liquid and gases to produce clean effluents. Two phase vacuum e.....
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A photovoltaic device comprising a photovoltaic cell is provided. The photovoltaic cell includes an emitter layer comprising a crystalline semiconductor material and a lightly doped crystalline substrate disposed adjacent the emitter layer. The lightly doped crystalline substrate and the emitter lay.....
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By recovering nutrients from urine in small decentralized reactors, we developed a dry sanitation system, which is affordable, produces a valuable fertilizer, promotes entrepreneurship and reduces pollution of water resources.Stage of development : At usable levelProject Record: In Zurich at Eawag.....
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