Overview
Currently, there is no public sewerage system along the central coastal area of South Lantau between Shui Hau and Ham Tin, and sewage from this area is often treated and disposed of by means of private on-site treatment facilities such as septic tanks and soakaway (STS) systems. Provision of the public sewerage system to this area can help improve environmental hygiene by reducing the amount of pollutants being discharged into the receiving coastal waters and protect the water quality of nearby bathing beaches.
According to the natural population growth projection and the planned housing development, sewage flow in South Lantau is projected to reach 5800 m3 /day from an ultimate population of around 12600 in 2039. To meet the sewage disposal need, we are going to construct a trunk sewerage system for Pui O area, a secondary STW at San Shek Wan and a village sewerage system for Lo Uk.
Upon completion of the works, sewage from the area will be conveyed to the proposed STW for proper treatment and the treated effluent will be discharged into the sea about 1.4 km off the South Lantau coast.
Project Scope
The works include
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Construction of a secondary sewage treatment works (STW) at San Shek Wan in South Lantau and about 1.4 km long submarine outfall;
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Construction of a sewage pumping station (SPS) at Pui O;
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Construction of about 4.1 km of gravity sewers with diameters ranging from 150 mm to 375 mm along South Lantau Road and Chi Ma Wan Road and at Pui O Lo Uk ;
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Construction of about 1.2 km of twin rising mains with a diameter of 200 mm along South Lantau Road and Chi Ma Wan Road; and
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Ancillary works.
Project Benefits
Building of a secondary sewage treatment works and a sewage pumping station in bid to improve water quality of Lantau South and the sanitary condition of unsewered villages/areas.
Project Features
Conservation of Environment and Nature
Project Site Office by Modular Integrated Construction
Major Sewage Treatment Technology
