May 18th, 2018

Lahmeyer helps to provide high-grade drinking water for Bahrain

The World Trade Center in Bahrain

The World Trade Center in Bahrain*

In December 2017, Lahmeyer International started a potabilisation project in the Kingdom of Bahrain with the awarding authority being the local Electricity and Water Authority (EWA). The EWA sets up a plant to produce potable water from distillate to satisfy the demand of the population for high-grade drinking water. Due to a positive experience gained in prior cooperations, the EWA decided to once again trust on Lahmeyer’s expertise in potabilisation. The new plant is supposed to be integrated into the existing Sitra Power & Water Station. Lahmeyer will provide consultancy services to the EWA through all project periods, i.e. from the planning and tendering phase through the design review to the actual construction of the plant.

Clean water for Bahrain using remineralisation treatment and disinfection

A reliable supply of clean potable water of constant high quality is the basis for human wellbeing and health. In the past, the Sitra Power & Water Station met the local demand for drinking water by mixing distillate with other water streams. However, this method of producing potable water is rather unreliable as the quality of the final product fluctuates. Therefore, the EWA decided to set up a state-of-the-art plant using controlled remineralisation treatment and disinfection according to international standards (Gulf Standard and WHO) to reliably produce high-grade drinking water.

Construction of the plant during running operation

The new installation has to be integrated into the existing and fully operational Sitra Power & Water Station. Within this setup, the small plot allocated to the installation poses a challenge in the design of the facility. The Lahmeyer engineers have already developed solutions enabling them to realise the project within the schedule. The finalised project will be able supply up to 30 MIGD (Million Imperial Gallons per Day, approx. 137,000 m³/day) of potable water to the people of the Kingdom of Bahrain. The planning and construction phase is planned to be finished by mid-2019. After a two-year monitoring phase with semi-annual check-ups, the engineering company schedules the completion for 2021.

Examination of the existing capacity concerning seawater desalination

For a better supply of drinking water in Bahrain, the EWA engages in some further activities with the support of Lahmeyer. On a pre-feasibility level of the project, Lahmeyer engineers examine the possible extension of the existing desalination capacity in Sitra on the basis of the existing sea water intake structures. As an option for replacing the 40-year-old (Phase I) thermal desalination plants, Lahmeyer recommends the construction of sea water reverse osmosis (SWRO) units with suitable 2-stage pre-treatment facilities for raw water from the gulf using dissolved air flotation (DAF) and ultrafiltration (UF). This setup could triple the output from 5 MIGD to 15 MIGD. Another option is the construction of a new thermal desalination units. The result would be an increase of output from 5 to 8 MIGD.


* Image subject to Creative Commons License.


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