Source: Clean Technica
After spending three months reviewing PhD papers during her vacation, speaking with her 3M mentor, and testing her inventions with contaminated water from Nashua wastewater treatment facility, Deepika developed a system that could cheaply and easily purify water containing harmful bacteria. Her process involves exposing titanium oxide and zinc oxide to sunlight, which initiates a chemical reaction that forms hydroxyl radicals and super oxides. These compounds are able to oxide organic substances into water and carbon dioxide.
After counting the levels of coliform bacteria before and after applying her system with 3M Petrifilms, she found that her system had significantly reduced the amount of coliforms from 8,000 down to 50 and E.coli from more than 1,000 down to none in less than 8 hours. In one hour she was also able to degrade methane blue, oxidizing it faster than most current processes.
Kurup's composite which incorporates cement and 3M Glass Bubbles, costs half a cent per gram. Applied through both a photocatalytic rod and reflector film, she was able to achieve astonishing results with an amazing amount of efficiency and consistency. Kurupt, now a high school freshman plans to apply for a patent for her system and start a nonprofit to help deploy her innovation.
Blue Energy, a UK-based renewable energy firm unveiled plans to build a 155 MW solar power plant in Ghana, said to be the largest in the continent. The $400 million Nzema project will have the capacity to generate sufficient energy for 100,000 homes. Unlike many other solar power plants, the Ghana facility will run on 630,000 photovoltaic panels deemed most suitable to Ghana's particular climatic constraints. The 155 megawatt plant will increase Ghana's generating capacity by 6%.
Industry Analyst Ash Sharma at IMS Research says that the key element in helping the project go ahead has been Ghana's renewable energy law under which the plant has been awarded a deed-in tariff for 20 years, premium guarantees for the working life of the site.
A facility of this scale is possible now because the price of PV modules has dropped by 40% over the last couple of years, according to the BBC. Construction is scheduled to begin late 2013, with the plant switching online by the beginning of 2014.
Source: The BBC