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ISSN : 2456-8643

Title:
NTEGRATED EVALUATION FOR SUSTAINABILITY AND CLIMATE COMPATIBILITY OF WASTEWATER MANAGEMENT IN ECO-CITIES: CASE STUDY OF KIGAMBONI, TANZANIA

Authors:
Anesi S. Mahenge and Michae M. Malabeja

Abstract:
The government of Tanzania developed a new master plan of the eco-city at Kigamboni area in Dar es Salaam. The new eco-city among other thing will provide an integrated wastewater system in line with climate change development initiatives. The master plan recommended the centralized MBR technology for the wastewater treatment for the city. However, sustainability issues of wastewater were not addressed in the master plan. Although the MBR technology is one of the best technology, its selection for the proposed city of Kigamboni city was made without prior evaluation for its sustainability. There is no detailed technical, social, Environment and economy analysis for the selected technology. The main objective of this study was to review the eco-city master plan with a view of assessing its sustainability and its capacity to integrate in the existing terrain. In order to evaluate the master plan, a set of criteria and indicators were developed based on social, economic and environmental dimensions. The set criteria were analyzed using the Analytical Hierarchy Process (AHP) to compare and rank different alternatives (decentralized or biological technology, Hybrid and centralized MBR) of wastewater technologies suitable for Kigamboni eco-city. Sustainability analysis based on AHP showed 38.87%, 36.28 and 24.86% for decentralized or biological technology, Hybrid and centralized MBR, respectively. MBR has scored low compare to other technologies such as Anaerobic Baffled Reactors (ABR) and Constructed Wetlands (CWs). The study also found that public participation on wastewater selection was inadequate, planning process involved few top political and influential leaders

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