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From seawater to drinking water
How seawater is desalinated
A 411MW combined gas turbine power plant will provide electricity to the desalination plant. Excess electricity will be sold back to the electric grid.
1. INTAKE
Under this buoy beneath the seabed are two 2.5m diameter-wide pipes that take in seawater.
The seawater is pumped in and passes through filter screens of 2mm-20mm to filter out objects such as sand. Next, the seawater passes through auto-strainers that further filter the water.
Sometimes marine life like stingrays and sea snakes are found trapped in the filter. They are put into the container.
2. PRE-TREATMENT
The next step in the desalination process takes place in the Ultra Filtration (UF) building. Kristal UF membranes are used to remove micro-organisms and bacteria.
Filtered water flows inside the follow membrane.
The fibre membranes are thin, noodle-like hollow tubes that allow only objects smaller than 10 nanometres to pass through. Even the Sars virus will be filtered out.
The Kristal UF membranes are stored in these vertical cylinders. To clean the membranes, water is pumped in the reverse direction.
3. REVERSE OSMOSIS
Pressure is applied to push the water through the osmosis membrane to remove salt and impurities.
Pressure → Salt and other impurities - Pure Water
The water recovered is very pure and is re-mineralised with lime and carbon dioxide to adjust the pH level. Chlorine, fluoride and ammonium sulphate are added for fluoridation and chloramination.
The water is stored before being pumped to a reservoir for delivery to homes and industries.
How seawater is desalinated
A 411MW combined gas turbine power plant will provide electricity to the desalination plant. Excess electricity will be sold back to the electric grid.
1. INTAKE
Under this buoy beneath the seabed are two 2.5m diameter-wide pipes that take in seawater.
The seawater is pumped in and passes through filter screens of 2mm-20mm to filter out objects such as sand. Next, the seawater passes through auto-strainers that further filter the water.
Sometimes marine life like stingrays and sea snakes are found trapped in the filter. They are put into the container.
2. PRE-TREATMENT
The next step in the desalination process takes place in the Ultra Filtration (UF) building. Kristal UF membranes are used to remove micro-organisms and bacteria.
Filtered water flows inside the follow membrane.
The fibre membranes are thin, noodle-like hollow tubes that allow only objects smaller than 10 nanometres to pass through. Even the Sars virus will be filtered out.
The Kristal UF membranes are stored in these vertical cylinders. To clean the membranes, water is pumped in the reverse direction.
3. REVERSE OSMOSIS
Pressure is applied to push the water through the osmosis membrane to remove salt and impurities.
Pressure → Salt and other impurities - Pure Water
The water recovered is very pure and is re-mineralised with lime and carbon dioxide to adjust the pH level. Chlorine, fluoride and ammonium sulphate are added for fluoridation and chloramination.
The water is stored before being pumped to a reservoir for delivery to homes and industries.
