Water Treatment Plant 2.2

Water Treatment Plant 2.2 is one of five industrial water treatment plants we delivered in Qatar. The plant was commissioned and brought into service from December 2019, protected by a pre-engineered steel shelter, and operated under full O&M through to handover in 2021.

Project scope (EPC)

• Engineering & design of the treatment process together with the civil and structural works.
• Procurement & construction of the plant and a pre-engineered steel weather-protection building over the process equipment.
• Commissioning & start-up from December 2019, with performance testing against the treated-water specification.
• Operations & maintenance covering staffing, laboratory testing, consumables, sludge handling, and power supply through to handover.

Design & process

The plant treats groundwater drainage from a dewatering process, reducing the pollutant load before controlled discharge. It is designed for a hydraulic load of up to 6,000 m³/day (70 l/s). Designed for an inlet load of up to TSS 1,000 mg/l, the treatment train delivers a treated-water specification of TSS ≤10 mg/l, oil & grease ≤0.5 mg/l, BOD₅ ≤10 mg/l, COD ≤20 mg/l, E. coli ≤2.3 MPN/100 ml, and pH held between 6.5 and 7.5.

Technologies deployed

• Coagulation and flocculation using Polyaluminium Chloride and polymer dosing
• Sedimentation and clarification
• Multimedia / sand filtration
• Activated carbon adsorption
• Manganese and iron (Mn/Fe) reduction
• Sludge thickening and removal
• Independent diesel power generation with standby redundancy
• Pre-engineered steel weather-protection building (multi-span, designed to international steel codes)

Construction & commissioning timeline

• Commissioning and start-up from December 2019.
• Construction and installation of a pre-engineered steel weather-protection shelter (October–November 2020) to protect the plant and equipment from UV and rain.
• Continuous O&M maintained through to project handover in 2021.

Quality & HSE

Delivery was governed by our QA/QC approach — inspection, testing, and documentation against the treated-water specification — and by HSE management covering site safety, environmental control, and regulatory compliance. Laboratory testing and monthly operating reports tracked performance throughout the operations period.

Engineering challenges solved

• Commissioning the plant to its treated-water specification and stabilising performance from start-up.
• Designing and erecting a multi-span pre-engineered steel shelter over an operating plant to shield equipment from the climate.
• Maintaining treated-water quality against a variable inlet load through controlled dosing.
• Coordinating fabrication, delivery, and installation of the steel structure on a live site.

Operations and maintenance were provided by SGS through to handover in 2021. The plant is no longer under our O&M; the experience, systems, and standards demonstrated here are directly transferable to our solar PV and civil infrastructure delivery.