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Performance Evaluation of Sewage Treatment Plants in Central Zone

Download Performance Evaluation of Sewage Treatment Plants in Central Zone

Majorly it was observed that, cities have no proper sewerage network to collect entire sewage. Due to inadequate collection system major part of untreated sewage discharged directly/indirectly in open drains which lead to surface water bodies. The partly collected wastewater has been treated in STPs and the majority of STPs are operating without obtaining consent to operate under Water (Prevention & Control of Pollution) Act, 1974 from respective SPCBs. All the STPs have by-pass arrangement. The oxidation ponds and waste stabilization ponds were in operation with a high retention time and lot of sludge deposited in it but these ponds were not cleaned regularly. These ponds do not have proper path/approach road and surrounding are covered with grass/ bushes. The overall maintenance of oxidation ponds & waste stabilization ponds was observed to be very poor. Proper records are not being maintained for the operation of STPs like inlet flow, outlet flow, sludge generation etc by the STP operators. It was observed that reuse/ recycling of treated wastewater is not planned yet. The treated sewage is being discharged in the nearest wastewater drain. Chlorination is not being done at outlet of any of the STP for control of Total/Feacal Coliforms.

Categories: Sanitation, Traitement des eaux usées
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Download Performance Evaluation of Sewage Treatment Plants in Central Zone

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AFRICAN WATER ASSOCIATION – Côte d’Ivoire – Abidjan – Cocody Riviera Palmeraie, rond point place de la renaissance, immeuble SODECI 2e étage
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