The World Food Programme (WFP) Ethiopia Country Officeintends to procure the supply, installation, and commissioning of a Reverse Osmosis (RO) water treatment plant/Desalination system to provide potable water .
UNITED NATIONS WORLD FOOD PROGRAMME (WFP)
Ethiopia Country Office
REQUEST FOR EXPRESSION OF INTEREST (EOI) )
No.ET-EOI-003-2026
For Supply, Installation and Commissioning of Reverse Osmosis (RO) Desalination System at Semera WFP Premises, Afar Region, Ethiopia
Closing on 13 July at 12:00 hrs
1. BACKGROUND
The World Food Programme (WFP) Ethiopia Country Officeintends to procure the supply, installation, and commissioning of a Reverse Osmosis (RO) water treatment plant/Desalination system to provide potable water for operational use at its Semera WFP compound.
The source water is from a drilled borehole, characterized by elevated salinity and dissolved contaminants requiring advanced treatment.
2. OBJECTIVE
The objective of this Expression of Interest (EOI) is to identify qualified and experienced suppliers capable of delivering a complete water treatment system that meets operational and potable water quality requirements.
3. TECHNICAL REQUIREMENTS & PROJECT SPECIFICATIONS
3.1 Customer Requirements
The Client requires the supply, installation, and commissioning of a 3 m³/hr Reverse Osmosis (RO) system to meet operational needs.
The requirement is based on the water analysis report from the College of Technology & Built Engineering dated 28 January 2026, and applicable site conditions. (Review Annex 2)
A comprehensive and updated water analysis shall be conducted prior to final system design and order confirmation.
The system shall be designed to produce potable water in accordance with WHO Drinking Water Guidelines.
3.2 Site Conditions
The available water analysis indicates that the following parameters exceed acceptable limits:
| Parameter | Unit | Result | Limit |
| TDS | Ppm | 3,900 | <1000 |
| Calcium | Ppm | 245 | <150 |
| Copper | Ppm | 3.21 | <2 |
| Conductivity | µS/cm | 5,900 | <1,500 |
| Chloride | Ppm | 380 | <250 |
3.3 Indicative Treatment Process
The treatment process is expected to include, but not be limited to:
· Filtration
· Reverse Osmosis (RO)
· Disinfection
Suppliers are encouraged to propose optimized solutions based on their technical expertise.
3.4 Indicative System Overview
The system configuration may include:
· Raw water abstraction from borehole and storage in a raw water tank
· Pre-treatment using a multimedia (glass media) pressure filter to remove turbidity and suspended solids
· Chemical dosing (antiscalant) to prevent membrane scaling
· Reverse osmosis system for removal of dissolved salts, heavy metals, and contaminants
· Post-treatment disinfection (chlorination) prior to storage in treated water tank
3.5 Key Equipment (Indicative)
The system is expected to include, but not limited to:
· Centrifugal transfer/booster pump (~1.6 kW indicative)
· Automatic multimedia (glass media) pressure filter (approx. 900 mm diameter) taloys
· Reverse osmosis plant (3 m³/hr capacity)
· Chemical dosing systems
· Disinfection unit
· Cleaning-in-place (CIP) system
· Associated piping, valves, and control systems
Final equipment selection and system design shall be proposed by the supplier based on verified design data.
3.6 Indicative System Overview
The system configuration may include:
· Raw water abstraction from borehole and storage in a raw water tank
· Pre-treatment using a multimedia (glass media) pressure filter to remove turbidity and suspended solids
· Chemical dosing (antiscalant) to prevent membrane scaling
· Reverse osmosis system for removal of dissolved salts, heavy metals, and contaminants
· Post-treatment disinfection (chlorination) prior to storage in treated water tank
3.7 Indicative System Layout
Reverse Osmosis Treated Water Tank
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