Reuse of treated wastewater from Lakhssas WWTP for green space irrigation
Project for the valorization of effluents from the Lakhssas WWTP (Sidi Ifni), including plant upgrading (tertiary treatment), construction of a 50 m³ intake basin, a 200 m³ semi-buried reservoir, and deployment of an HDPE distribution network with a drip irrigation system for green spaces.
As part of the sustainable development of the Guelmim-Oued Noun region, this project aims to preserve drinking water resources by reusing treated wastewater from the Lakhssas WWTP for green space irrigation. The project is subject to strict environmental standards (ESMP, EBRD standards).
Main Structures
- Tertiary Treatment: Continuous backwash sand filter (Q=25 m³/h), UV reactor, lime dosing system, and ion exchange softening.
- Civil Engineering: 50 m³ water intake basin with its technical room, 200 m³ semi-buried waterproof reinforced concrete (B30) reservoir, and reinforced concrete inspection, valve, and washout chambers.
- Pipelines: Discharge pipeline (PVC PN16 DN125) and HDPE distribution network (DN 15 to DN 90, PN 10) equipped with a self-regulating and self-flushing drip irrigation system.
- Equipment: Submersible pump set (Q=25 m³/h, TDH=130 m), 500 L anti-water hammer bladder tank, electromagnetic flowmeter, chlorination system, and smart metering terminal.
Site Constraints
- Environmental: Strict compliance with the Environmental and Social Management Plan (ESMP), waste management, and prevention of hydrocarbon spills.
- Technical: Protection of existing networks (drinking water, electricity), soft and rocky terrain requiring shoring and trench boxing, and a global execution deadline of 8 months.
My role and responsibilities
Analysis of Tender Documents and CPS, execution studies and calculation notes (hydraulic, reinforced concrete, transient regime), supervision of civil engineering and pipe laying works, control of hydro-mechanical equipment installation (pumps, tertiary treatment), and coordination of watertightness tests and industrial commissioning.
Project scope
WWTP upgrading, civil engineering and equipment of the 50 m³ basin and 200 m³ reservoir, discharge pipeline, distribution network with ancillary structures, and smart metering terminal.
Construction methods
Earthworks with shoring if necessary, pouring of waterproof reinforced concrete with careful treatment of construction joints (water-stop), laying of HDPE/PVC pipes on a sand bedding with primary and secondary backfill compacted to 95% MDD.
Technical specifications
B30 waterproof concrete for storage structures, 316L stainless steel piping for parts in contact with treated water, submersible pump sets with electronic starting and anti-water hammer protection.
During works
