Thursday, July 9, 2015

CoET College comes up with simple waste treatment know-how

  Xpresstz. com       Thursday, July 9, 2015
COET senior lecturer in the department of Water Resources Engineering, Dr Richard Kimwaga (behind) explaining to one of the visitors attending the University of Dar es Salaam (UDSM)
University of Dar es Salaam (UDSM), College of Technology and Engineering (CoET) is turning from research to action after it has managed to introduce local and easy to use Constructed Wetland Technology (CWT) which treats domestic and industrial waste water.
After a research done for 20 years the technology is to support agro-processing factories to supplement their energy requirements and have alternatives besides domestic fish farming and vegetable growing to minimize expenses incurred for buying water.
According to CoET, the economy of the country is growing daily whereas the higher the consumers are the more they produce waste water. 
There is a large number of industries and abattoirs with a big amount of waste water which is potential for the fixing of this technology which can  produce other important products including biogas and nutrients, fertilizer as well increase individual as  income. 
In the world the technology is available but here the applications of the technology is expensive as it must employ skilled people, investment is high and operational maintenance is expensive.
After the CoET realized that a large amount of waste water disappear every day from houses and industries, they embarked on a research that was intended to innovate low cost alternative waste water technology.
Explaining on how it works, he said, composed of filtering media and plants, when waste water gets into the constructed wetlands technology, it stays for seven to ten days and during this process pollutants that are in the wastewater are removed by a combination of physical, chemical and biological processes.
The technology from waste water flows in sub-surface can be treated  and used in different ways including fish farming, irrigations,  production of biogas and nutrient fertilizers.
COET senior lecturer in the department of Water Resources Engineering, Dr Richard Kimwaga, revealed this recently when speaking to The Guardian at the University of Dar es Salaam (UDSM) pavilion in the ongoing 39 th Dar es Salaam International Trade Fair (DITF).
He said the project is aimed at strengthening capacity to sustainably manage agro-process waste water, develop and optimize innovation waste water treatment process. 
Based on the research, the technology is being applied not only within the country but also to other countries including Uganda and Kenya. In the country the technology has been installed installed in some of secondary schools in Kilimanjaro, Dar es Salaam and Iringa and two households.
Outside the country the technology is installed in Uganda, Kenya and Seychelles, adding that the college intended to ensure waste water become resources that can change life style of people and create employments.
Due to the big success of the research  of the waste water technology, CoET is implementing a large intergraded process for agro-industry waste water treatment project in Arusha known as Banana Investment Ltd (BIL).

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