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Accueil du site → Master → Pays Bas → 2014 → Climate compatible wetland-based sanitation for sustainable cities (eco-cities) in East Africa

UNESCO-IHE Institute for Water Education, Delft (2014)

Climate compatible wetland-based sanitation for sustainable cities (eco-cities) in East Africa

Balthazar, T.L

Titre : Climate compatible wetland-based sanitation for sustainable cities (eco-cities) in East Africa

Auteur : Balthazar, T.L

Université de soutenance : UNESCO-IHE Institute for Water Education, Delft

Grade : Master of Science (MS) 2014

This research was done to propose a Climate Compatible process design of a Wetland Based Sanitation for sustainable Cities in East Africa cities namely in Dar es Salaam and Mombasa. Through completion of this study the inventory assessment of existing sanitation situation in the studied areas were done through related stakeholders. The results entails that out of all the surveyed existing wetland-based sanitation systems, 80% experience various forms of operational problems. These problems include blockages, seepage and cracks that prevented WBS from performing satisfactorily as conventional wastewater systems. The study also discovered that 78% of population in the surveyed areas were found not have access to piped sewerage, which is disproportionate if compared to the percentage of growing population. Lack of appropriate sewerage can facilitate the discharge of untreated or partially treated wastewater to the environment. The efficiency removal of several wastewater parameters from Hacienda eco-city estate WBS system based on secondary data were conducted to verify if the system is achieving climate compatibility criteria. The study revealed a successful performance of the existing WBS system for wastewater treatment with respect to organic matter (BOD, NO3-N and NH3-N) with removal efficiency of 95, 78, and 86% respectively. The quality of effluent meet the admissible local standard for discharging in surface water courses with 29.7, 9.04 & 12.96 mg/l respectively. It has been concluded that the wetland system is climate compatible. Furthermore, Review to evaluate retrofit feasibility design proposal was carried basing on analyzed parameters, HRT of 15 hrs in the primary treatment were calculated also hydraulic loading rate (HLR) of 0.345 m/d and the wetland area of 591.74 m2 based on BOD respectively were obtained, finally the width and length of CW was calculated. The system aim is to promote the paradigm shift towards low emission and climate resilient development pathway by supporting the region to limit the greenhouse gas (GHG) emissions and adapt to the impacts of climate change through wastewater management. Finally the author recommended that for the proposed WBS system to live up initiatives are needed to mobilize resources and build alliances with all stakeholders and potential partners to promote affordable and appropriate wetland-based sanitation with an emphasis on reduction of greenhouse gases (GHGs) emissions, nutrients recycle and renewable energy productions so that mitigate climate change for the sustainable development of the future cities in East Africa

Sujets  : sanitation wastewater treatment climate change greenhouse gas emissions East Africa


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