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

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 Existing waste composition data are outdated, limiting informed technology selection and appropriate facility sizing.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 (GHG) impacts, methane avoidance potential, operational costs, and sensitivity to diversion rates, feedstock variability, tariffs, and operating conditions. • Develop implementation pathways for pilot projects, including preliminary design concepts, siting considerations, integration with existing waste management infrastructure, and key performance indicators (KPIs) aligned with DMDP2 implementation timelines. • Assess the institutional and operational framework for circular organic waste management, including recommendations on public-private participation models, environmental and social considerations, and training needs for operators and regulators. Lot 2: Feasiblity Study on Landfill Gas Management and Organic Waste Composting at Providence Landfill in Seychelles. The Republic of Seychelles is a Small Island Developing State (SIDS) facing increasing challenges in managing municipal solid waste due to limited land availability, environmental sensitivity, and growing waste generation driven by urbanization, tourism, and economic development. Solid waste management services are primarily concentrated on Mahé Island, where the Providence landfill serves as the country’s main disposal facility. The landfill has been in operation for several years and is currently under significant operational and environmental pressure, including constraints related to available capacity, waste stabilization, leachate management, and uncontrolled landfill gas emissions. The LWMA, under the Ministry of Agriculture, Climate Change, and Environment,through the Solid Waste Management Project, is currently undertaking the upgrade, phased expansion, and progressive closure of the Providence landfill. These efforts are aligned with LWMA’s Strategic Plan for Integrated Solid Waste Management in Seychelles, which aims to transition the sector toward more sustainable, climate-resilient, and technologically advanced waste management practices, including increased waste recovery and reduced reliance on landfilling. The objective of this assignment is to support the LWMA and the implementation of the ongoing Solid Waste Management (SWM) Project in developing feasible, cost-effective, and implementation-ready solutions for: • Land Fill Gas management at the Providence landfill; and • Organic waste diversion and composting systems linked to landfill operations. The assignment will provide upstream technical, environmental, and financial analysis to address key gaps in methane mitigation and waste stream optimization, ensuring that proposed solutions are practical, site-specific, and aligned with the operational context and remaining lifespan of the Providence landfill. Lot 3: Feasibility Study on Advancement of Landfill Methane Management and Gas to Energy Potential in Maputo,Mozambique. Maputo is undergoing a critical transition in its solid waste management (SWM) system, driven by rapid urban growth, increasing waste generation, and the need to improve environmental performance and service delivery. While collection services have expanded in recent years, the system remains heavily dependent on disposal, with limited treatment and recovery, and persistent environmental and operational challenges associated with existing disposal practices. The Maputo Municipal Council (CMM) is implementing the Maputo Urban Transformation Project (PTUM, the Project), with the objective of improving urban infrastructure and strengthening institutional capacity for sustainable urban development in Maputo City. PTUM is a multi-component investment program aligned with the Municipal Development Plan and aims to support inclusive urban growth, improved service delivery, and enhanced environmental management Objective of the assignment: The objective of this assignment is to support the Maputo Municipal Council (CMM) and the implementation of the PTUM project in developing feasible, cost-effective, and implementation-ready landfill gas (LFG) management solutions for the Hulene dumpsite and the Katembe sanitary landfill. The assignment will provide upstream technical, environmental, and financial analysis to inform methane mitigation strategies during the transition from Hulene to Katembe, ensuring that LFG management is addressed in a manner that is practical, site-specific, and aligned with the operational and contractual context of PTUM. Lot 4: Feasibility Study for Waste Characterization and Waste Treatment Technology Options Analysis for Kinshasa -Democratic Republic of Congo. Kinshasa, the capital of the Democratic Republic of Congo (DRC), is one of the fastest growing cities in Africa, with an estimated population exceeding 17 million inhabitants. Rapid population growth, urban expansion, and increased consumption patterns have resulted in a substantial increase in municipal solid waste (MSW) generation. However, waste collection coverage remains limited, and most waste generated in the city is either disposed in uncontrolled dumpsites or remains uncollected in public spaces, drainage channels, and waterways. This situation contributes to severe environmental degradation, flooding risks, and public health concerns. The Government of the Democratic Republic of Congo,is preparing the Kin La Belle (KLB) Program, a Multi-Phase Programmatic Approach (MPA) aimed at transforming Kinshasa into a city that is clean, connected, and competitive. Objective of the assignment: The objective of this consultancy is to support the Government of the Democratic Republic of Congo in identifying technically feasible, environmentally sustainable, and financially viable waste treatment and disposal solutions for Kinshasa. The assignment will achieve this objective through: • Conducting a statistically robust waste generation and composition analysis for Kinshasa • Developing projections of waste quantities and characteristics • Evaluating feasible waste treatment and resource recovery technologies • Preparing a comparative options analysis of treatment and disposal systems • Developing preliminary technical feasibility assessments for viable options • Estimating indicative CAPEX and OPEX requirements • Identifying key institutional and operational considerations for implementation The study will provide decision-ready technical inputs to guide the preparation of future solid waste management investments under the KLB Program, supporting the transition toward more advanced and sustainable waste management systems. Lot 5: Technical Assesment and Conceptual Development of priority Solid Waste Management Investments in Antananarivo Madagascar. Greater Antananarivo, the capital region of Madagascar, is home to approximately three million residents and is the country’s primary economic and administrative center. Rapid population growth, urban expansion, and increasing economic activity have resulted in a significant increase in municipal solid waste generation over the past two decades. However, the development of waste management infrastructure and services has not kept pace with this growth. Currently, the majority of municipal solid waste generated in Greater Antananarivo is transported to the Andralanitra dumpsite, which serves as the primary disposal facility for the metropolitan area. The site has been operating for many years under conditions typical of uncontrolled disposal facilities, including limited environmental controls, inefficient operational practices, and constrained remaining capacity. These factors pose environmental and public health risks and limit the long-term sustainability of the current disposal system. At the same time, inadequate solid waste management practices have contributed to the accumulation of waste in drainage channels and waterways throughout the city. Blockages of drainage infrastructure by waste significantly increase flood risks during heavy rainfall events. Objective of the assignment: The overall objective of the assignment is to support the Government of Madagascar in identifying and developing technically feasible solid waste management investments for Greater Antananarivo. Specifically, the assignment will: • Assess the current operational and environmental conditions of the Andralanitra dumpsite and develop a conceptual plan for its rehabilitation and capacity improvement. • Review previously identified candidate sites and develop a conceptual plan for a future sanitary landfill facility to serve Greater Antananarivo. • Assess the feasibility of diverting organic waste from large generators, particularly markets, and develop a concept for composting facilities and associated operational systems. • Provide preliminary technical, operational, and financial considerations to support the implementation of these priority interventions. Specific Requirements/Information IMPORTANT This Request for Expression of Interest (REOI) comprises five (5) distinct projects, which will be issued under a single solicitation divided into five (5) separate lots and is not a Request for Propsal (RFP). Interested vendors are invited to express their interest in one, two,three,four or all Five lots lots, depending on their capacity and experience. Bidders are required to clearly indicate the project(s)/lot(s) they wish to participate in by completing the attached form Self Declaration Form Interested vendors must posses the necessary technical expertise and capacity to provide the required services, as only suitably qualified vendors will be invited to participate. Vendors must register their interest to this EOI electronically online, through UNGM. In addition, vendors who have registered their interest in UNGM must also complete Annex A and return it via e-mail to unon-procurement@un.org with a copy to gladys.murangi@un.org, by the REOI closing date of 22 May 2026. Please refer to Annex A for detailed instructions and assessment procedure. Vendors expressing interest must be registered with the United Nations Global Marketplace (UNGM) at minimum of Basic Registration Level. Vendors not registered in UNGM will not be eligible to paricipate in the Request for Proposal at a later stage. Details of the techincal evaluation criteria and other particular requirements will be provided under the Request for Proposal stage.Please note that this request for REOI is not an invitation for submission of a proposal. Vendors possessing the following attributes are strongly encouraged to participate: (a) Inclusive of persons with disabilities, (b) A demonstrated commitment to achieving gender equality, (c) Woman-owned business status, (d) Originating from developing countries, countries with economies in transition, or least developed countries. An Expression of Interest does not guarantee paricipation in the request for proposal as only suitably qualified vendors will be invited to pariticpate