Development of Conceptual Design and Cost Estimation for Decentralized Sanitation and Wastewater Treatment Solutions & Management plan in Korail Settlement, Dhaka

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Title of the assignmentDevelopment of Conceptual Design and Cost Estimation forDecentralized Sanitation and Wastewater Treatment Solutions & Management plan in Korail Settlement, DhakaPurposeTo develop conceptual decentralized wastewater treatment solutions and indicative cost estimates for Korail Settlement through an evidence-based planning process that supports improved wastewater and fecal sludge management and provides a pathway toward sustainable municipal service integrationLocationKarail Slum, Dhaka, BangladeshEstimated Duration3 MonthsReporting to Technical Supervisor of this assignmentWASH Specialist, WASH Section, UNICEF, Bangladesh1.BackgroundKorail is the largest informal settlement in Dhaka, covering approximately 100 acres and accommodating an estimated 250,000 residents. The settlement is characterized by very high population density, inadequate housing conditions, limited public infrastructure, and insufficient water and sanitation services.The sanitation situation remains critical. Most households rely on shared or informal sanitation facilities, with wastewater and fecal sludge frequently discharged into the surrounding environment. Formal fecal sludge management services are almost non-existent, contributing significantly to environmental pollution, particularly in Banani Lake.Water quality is also a major concern. Widespread contamination of municipal piped water due to leaking distribution systems, illegal connections, and unsafe storage practices exposesresidents to significant public health risks, including diarrheal diseases and typhoid. Children are particularly vulnerable.UNICEF, in partnership with Dhaka North City Corporation (DNCC), the Government of Denmark, the Gates Foundation and other stakeholders, has been supporting innovative sanitation interventions within Korail. However, a comprehensive Karail low-income community sanitation and wastewater management framework, including a clear pathway for integration into Dhaka city-wide inclusive sanitation planning and DWASA/DNCC investment planning, is still lacking.Given the complexity of the settlement, land tenure challenges, and limited municipal service provision, there is a need to develop technically feasible, climate-resilient and scalable decentralized wastewater treatment solutions accompanied by indicative cost estimates and implementation strategies.2.Objectives, Purpose and Expected Results Purpose:To develop a settlement-level conceptual sanitation and wastewater management plan/ solutionsfor Karail including, conceptual decentralized/hybrid wastewater management solutions, indicative investment and O&M costing, t through an evidence-based planning process that supports improved wastewater and fecal sludge management and provides a practical pathway for sustainable integration of the settlement into city wide sanitation planning process.Objectives:Assess the existing sanitation, wastewater, fecal sludge management, environmental, and institutional and social inclusion and service delivery contexts in Karail.Develop technically feasible, climate resilient and financially realistic decentralized and/or hybrid sanitation and wastewater management scenarios suitable for Karail and comparable high-density low-income settlements.Prepare conceptual engineering designs, indicative layouts, service-zone maps and technology option for clustered and hybrid decentralized wastewater treatment systems.Define potential service zones and infrastructure requirements.Estimate indicative CAPEX, OPEX, lifecycle costs, investment requirements, O&M responsibilities, cost recovery options, and phased investment/deployment options.Provide recommendations for institutional arrangements, service delivery mechanisms, community engagement, gender/disability inclusion, safeguards long-term O&M and integration of Karail into DWASA/DNCC master planning and CWIS processes.Expected ResultsOutput 1:Baseline Assessment, Service-Zone Mapping and Strategic ProjectionA comprehensive assessment synthesizing existing information on wastewater, fecal sludge management, water quality, socio-economic conditions, environmental contamination pathways and institutional challenges in Korail.Output 2:Decentralized/Hybrid Sanitation and Wastewater Treatment Options and Concept DesignConceptual designs of decentralized and hybrid wastewater treatment solutions suitable for high-density informal settlements, including phased implementation strategies.Output 3:Karail Sanitation and Wastewater Management Plan, Service Zone Modelling and Investment FrameworkService zone delineation, wastewater demand projections, indicative engineering requirements, land requirements, and cost estimates to support future investment decisions.Major ActivitiesTask 1: Inception and Baseline AssessmentTask 2: Institutional and Service Delivery AssessmentTask 3: Development of Wastewater Management Scenarios Task 4: Conceptual Engineering DesignTask 5: Service Zone Planning and Cost Estimation Task 6: Final Reporting and Presentation3. of AssignmentDetails of these tasks are described in the table belowTimelineName of Activity of tasksLocations/ quantityDeliverablesWeek 2Inception and Baseline Assessmentreports, plans and datasets related to water, sanitation, wastewater and fecal sludge management in Korail.environmental and topographical conditions.contamination pathways and wastewater leakage points.consultations with relevant government agencies, serviceKarail Slum, DhakaInception                         Report including methodology, workplan                                   and stakeholder engagement strategyTimelineName of Activity of tasksLocations/ quantityDeliverablesproviders, community representatives and development partners.with methodology and workplan.Week 6Institutional and Service Delivery Assessmentinstitutional arrangements and service provision mechanisms.with land tenure, service mandates and public sector engagement.integration into futuremunicipal wastewater management systems.Karail Slum, DhakaBaseline Assessment, service-zone mapping,                              and Institutional Analysis ReportWeek 8Development of Wastewater Management Scenariosdecentralized wastewater treatment technologies.nature-based, mechanical and hybrid treatment options.delivery scenarios integrating sewered and non-sewered systems.technical, environmental, social and financial criteria.Karail Slum, DhakaWastewater Management Scenarios                              and Technology Assessment ReportWeek 10Conceptual Engineering Designfor decentralized wastewater treatment facilities.and conveyance systems, including condominial or shallow sewer alternatives.and technology options.flooding risks and resource recovery opportunities.Karail Slum, DhakaScenario Assessment, Conceptual Design Package, Costing and Investment Roadmap and Service Zone PlanTimelineName of Activity of tasksLocations/ quantityDeliverablesWeek 11Service Zone Planning and Cost Estimationservice zones.generation and treatment demand.requirements.and operational cost estimates.implementation and investment scenarios.Karail Slum, DhakaCost Estimation and Investment RoadmapWeek 12Final Reporting and Presentationreports.recommendations to UNICEF and key stakeholders.finalize deliverables.Karail Slum, DhakaFinal Karail sanitation and wastewater management plan, CWIS integration note, capacity building completion report andPresentation5.Reporting requirementsThe consultant will work under the overall guidance of the UNICEF Bangladesh WASH Section and in close coordination with Dhaka North City Corporation (DNCC), community representative and other relevant stakeholders.All reports, datasets, drawings and outputs developed under this assignment shall become the property of UNICEF and shall be submitted in editable and PDF formats. The consulting firm shall not share data or outputs externally without UNICEF approval.Major report to be delivered:6.Payment SchedulePayments shall be linked to the satisfactory submission and approval of the agreed deliverables as follows:7.Qualification requirement of the company/institution/organization-income communities.Institutional QualificationsTeam Composition (Indicative)< >Evaluation Process and MethodEvaluation CRITERIA FOR TECHNICAL PROPOSALCategorySub-CriteriaPoints1. Technical Approach and MethodologyUnderstanding of assignment, methodology, workplan, stakeholder engagement approach, CWIS integration strategy, quality assurancemeasures352. Technical Soundness of Proposed SolutionsQuality of proposed wastewater treatment concepts, innovation, climate resilience,environmental safeguards, feasibility for high-density settlements153. Relevant Institutional ExperienceHave at least 10 years of demonstrated experience in urban sanitation, wastewater management, environmental engineering, or related infrastructure planning.Have completed at least 5 assignments in decentralized wastewater treatment systems (DEWATS/DWTS), fecal sludge management (FSM), or citywide inclusive sanitation (CWIS) planning during the last 10 years.Have at least 5 years of experience working in high-density urban settlements, informal settlements, slums, or low-income communitiesin Bangladesh or abroad.10Have proven experience in preparing sanitation master plans, feasibility studies, conceptual engineering designs, or investment plans.Demonstrate experience in Bangladesh or comparable South Asian contexts.Have multidisciplinary capacity covering engineering, planning, environmental management, social inclusion, and financialanalysis.4. Qualifications and Experience of Key ExpertsPositionEvaluation CriteriaPoints10Team Leader / Senior Sanitation EngineerEducational qualification, experience in urban sanitation planning, DEWATS/FSM/CWISprojects, leadership of similar assignments, experience in Bangladesh or SouthAsia3.0Wastewater Treatment SpecialistExperience in wastewater treatment technologies, decentralized systems, conceptual design, treatment process optimization1.5Urban Planner / GIS SpecialistExperience in service zone mapping, urban planning, GIS modelling, spatial analysis andinfrastructure planning1.0Environmental EngineerExperience in environmental assessments, pollution pathway analysis, climate resilience and environmentalsafeguards1.0Economist / Financial AnalystExperience in CAPEX/OPEXestimation, lifecycle costing, financial modelling, investment analysis and cost recovery mechanisms1.5SocialDevelopment & Community Engagement SpecialistExperience in stakeholder engagement, social inclusion, gender and disability considerations, institutional assessments1.0Overall, Team Complementarity and AdequacyAppropriateness of team composition, balance of expertise, level of effort and ability to deliver all outputs1.0Total Technical Score70For this RFP, theTechnical Proposalhas a total score of 70 points. Bidders must score minimum of 49 points to be considered technically compliant and in order for the Financial Proposals to be opened. Financial proposal has a total score of 30 points.The final selection of the bidder will be based on a quality and cost basis as specified in the RFP.

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