Date : 20 August 2025 (Wednesday)
Time : 3:00 p.m. (followed by a site visit at 4:00 p.m.)
Venue : Conference Room , 3/F Tseung Kwan O Desalination Plant Administration Building
Site Visit : Tseung Kwan O Desalination Plant
Time : 4:00 p.m.
The first stage of the Tseung Kwan O Desalination Plant (TKODP) was commissioned in December 2023 providing a new and stable water source that is not susceptible to climate change.
Using the latest reverse osmosis (RO) desalination technology, the first stage of the TKODP is producing potable water in compliance with the “Hong Kong Drinking Water Standards” with a production capacity of 135 000 m3 per day, equivalent to 5% of Hong Kong’s total daily fresh water demand. The TKODP, together with the Pak Kong Water Treatment Works and the Tseung Kwan O Primary Fresh Water Service Reservoir, will supply drinking water to Sai Kung as well as parts of East Kowloon and Hong Kong Island.
As a top-class waterworks infrastructure, the desalination plant has incorporated various sustainable and green features in its design, construction, operation and maintenance, minimising its environmental impacts while enhancing climate resilience.
The TKODP adopts a “double pass” RO desalination technology, a well-proven and widely used technology which accounts for more than 60% of global desalination production.
RO is a process of forcing water from seawater through a semi-permeable membrane under high pressure to become pure water. The RO membranes allow only water molecules to pass through while dissolved salts, organic matter and virus, etc are retained. In the first Pass RO, pre-treated seawater will pass through membranes to remove over 99.5% of salt, bacteria, viruses and other impurities, allowing clean water (also known as “permeate”) to enter the collection tube which will then undergo further RO treatment via the second Pass RO to enhance salt removal.
After the RO treatment, approximately 40% of potable water will be generated while discharging the remaining 60% of the processed seawater into the sea through a submarine outfall system.