| One untapped potential for market gardening |
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| Tuesday, 29 April 2008 | |
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The smell rebutante of water prevents the visitor to contemplate this beautiful spectacle of the two Archimedes screws that run lead and undulating movements of water that crashed on teeth screws like waves harass blocks Roche on the shore.Behind lies the post of desanding with its bridge and its degreasers who make trips to insulation, at the same time, grease and sand. At the bottom of these facilities, Starting from this level, there is a sharp difference in the color and smell of water from the lift station and that of tertiary treatment basins like the testimony samples kept by the chemist Idrissa Diallo in a fridge laboratory. Because in their path, this liquid was also detour to the clarifier. The water obtained after the processing chain is refined and meets the standards recommended by the World Health Organization (Oms) for watering plants, vegetable crops as there are several stores around the station .
The wastewater reuse is not a declaration of intent to the treatment plant. Charity begins well in this station. Amid this carpet of grass, several valves are movements roundabouts and carry on several tens of meters of purified water. "Our green spaces are sprayed with purified water," said the head of the factory El Hajj . In total, these are 2000 cubic meters of treated water that are reused for irrigation of green spaces in the Gulf in the construction of the toll highway. A large volume is released into the sea Just during the month of March, only 11,259 cubic metres which are used on 64,180 cubic meters of treated water. The wastewater reuse is not widespread in Senegal, despite the potential and despite the opportunities. "It takes awareness for large-scale use of treated wastewater in Senegal,we must contribute to improving the management of all available water resources. But also help conserve natural resources and contribute to the allocation of potable water to the exclusive consumption needs of the population, "says the director of the Onas, Amadou Lamine Dieng. In Senegal, an estimated 3% purified water in the station Cambérène reused. This low rate indicates that the use of these waters has not yet entered into our mores. This is one of the constraints to meet. "It must be noted that in some countries, wastewater reuse still faces constraints such as socio-cultural acceptance of this practice and also the difficulty in convincing the operators of the risks involved," says the director of the Onas at day of the World Water last year. That is why the department head operating Dakar 2, Aliou Diop supports the need for awareness for a good and large-scale use of these waters. The volume of treated water could be a boon to the revival and strengthening of gardening in the Niayes and other agricultural areas. But it must first solve the problem of channeling water from the station to a distance of 50 km or even beyond. "We face an urgent request. The vegetable areas Sangalkam, Sébikhotane, expressed demand for purified water, but the infrastructure for conducting these waters to this area that are lacking, "says Papa Ibrahima Mbor Dione. The hopes raised by those treated wastewater is hampered by a lack of facilities to carry the precious liquid over long distances to the delight of farmers who do not ask more. The methane is stored in the gasometer isolated from other installations to avoid any possible accidents. It is used to fuel the generator of 350 kva, which operates 24 h/24, a boiler, among others. This allows the station to have a strong degree of autonomy. "This methane stored in the gasometer operates a group and an electric boiler.Methane covers approximately 40% of the energy needs of the station and thus contributes to reducing the electricity bill, which revolves around 25000000 F CFA. With this production of energy, the station spends less 10 000 000 F CFA per month. |
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| Last Updated ( Tuesday, 17 February 2009 ) |
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