Feasibility Studies Circular Organic Waste, Landfill Gas Management and Organic Waste Composting Projects in Tanzania, Seychelles, Mozambique, Democratic Republic of Congo and Madagascar.

Summary

The United Nations Office at Nairobi (UNON), on behalf of the United Nations Human Settlements Programme (UN-Habitat) Regional Office for Africa (ROAF), invites qualified, experienced, and reputable consultancy firms with demonstrated experience to submit Expressions of Interest (EOI) for participation in the upcoming Request for Proposal (RFP) for the below 5 Projects : 1. Lot 1: Feasibility Study on Circular Organic Waste Management in Dar es Salaam ,Tanzania 2. Lot 2: Feasiblity Study on Landfill Gas Management and Organic Waste Composting at Providence Landfill in Seychelles 3. Lot 3: Feasibility Study on Advancement of Landfill Methane Management and Gas to Energy Potential in Maputo,Mozambique. 4. Lot 4: Feasibility Study for Waste Characterization and Waste Treatment Technology Options Analysis for Kinshasa -Democratic Republic of Congo. 5. Lot 5: Technical Assesment and Conceptual Development of priority Solid Waste Management Investments in Antananarivo Madagascar. Project Background: Lot 1: Feasibility Study on Circular Organic Waste Management in Dar es Salaam ,Tanzania. Dar es Salaam generates approximately 1.36 million tons of municipal solid waste (MSW) per year, equivalent to roughly 3,700 tons per day.1 Organic waste constitutes the dominant share of the municipal waste stream, accounting for an estimated 50-60%2, originating primarily from households, markets, institutions, and food-related enterprises.This organic fraction presents significant management challenges due to its high moisture content and contamination levels. Existing waste composition data are outdated, limiting informed technology selection and appropriate facility sizing. Seasonal rainfall further affects both waste characteristics and access to disposal sites, while the accumulation of waste in drainage channels exacerbates flooding and related public health risks. The Dar es Salaam Metropolitan Development Project Phase 2 (DMDP2) is a flagship operation supporting metropolitan-scale flood risk reduction and solid waste management in Tanzania’s largest city. Under DMDP2, the Government of Tanzania is implementing a major upgrade of the metropolitan solid waste management system. Component 2 - Integrated Solid Waste Management Infrastructure and Services supports the development of an integrated system for waste collection, transfer, treatment, and disposal across the Dar es Salaam metropolitan area. Objective of the assignment The objective of this assignment is to support the Government of Tanzania and the DMDP2 in identifying feasible and scalable solutions for circular organic waste management in Dar es Salaam. The study will provide upstream technical, environmental, and financial analysis to support the diversion of organic waste from disposal and the development of treatment and valorization pathways that reduce greenhouse gas emissions, improve system efficiency, and generate marketable products. Specifically, the assignment will: • Establish a baseline understanding of organic waste generation and characteristics in Dar es Salaam, including quantification of organics by source segment (e.g. households, markets, institutions, and food-related enterprises), seasonal variability, and contamination levels. • Identify and evaluate suitable organic waste treatment technologies, including composting and anaerobic digestion, and assess opportunities to integrate these solutions with planned transfer stations and sanitary landfill infrastructure under DMDP2, including evaluating potential siting and integration options at existing or rehabilitated waste management sites. • Assess market potential and business model for recovered products, including compost, digestate, biogas, electricity, and heat, considering quality standards, certification requirements, and potential offtake arrangements. • Evaluate environmental, climate, and financial performance of different diversion scenarios, including life-cycle greenhouse gas (GH