SWHEPP

Existing SWHSTW

The existing Shek Wu Hui Sewage Treatment Works (SWHSTW) has been operating for 30 years, treating sewage generated from Sheung Shui, Fanling and adjacent districts. The design capacity of the existing SWHSTW is 93,000 m3/day. After sewage treatment and ultra-violet disinfection, the treated effluent is discharged to Ng Tung River.

In 2016-2017, sewage treated by SWHSTW, on average, could reach 84,000 m3/day, which is approaching its design capacity.

Learn More

Preliminary Technical Assessment of Relocation

DSD conducted a preliminary technical assessment on the relocation of SWHSTW.

Candidate sites considered for the relocation include:

Sha Ling
Land at the south of Lo Wu Station
Tai Shek Mo - Cavern sewage treatment works option
Cham Shan - Cavern sewage treatment works option
Ki Lun Shan - Cavern sewage treatment works option
Fu Tei Au

Assessment factors include:

Geology suitability
Landownership
Environmental and Ecological impact
Traffic impact
Cope with sewage flow build up
Impact to upstream sewerage diversion
Other technical considerations

Learn More

Improvement Scheme

After completion of SWHEPP Improvement Scheme, its treatment capacity will be increased to 190,000 m3/day. The SWHEPP Improvement Scheme will be implemented in phases, as follows:

Advance Works: Commenced in mid 2015 and designed to increase the treatment capacity by 12,000 m3/day.
Main Work Stage 1: Commenced on 11 September 2019 to increase the treatment capacity by 35,000m3/day.
Remaining Stages: To provide additional capacity of 50,000m3/day.

To cope with other large scale development in the future, the need for new effluent polishing plants will be investigated by other Department.

Learn More

Project Schedule

SWHEPP – Main Works Stage 1
Awarded Engineering contract

DE/2018/03： Sidestream Treatment Facilities and E&M Works for Sludge Treatment Facilities

DE/2018/04： E&M Works for Sewage Treatment Facilities

DC/2018/06： Civil Works for Sludge Treatment Facilities and 132kV Primary Substation

DC/2018/07： Civil Works for Sewage Treatment Facilities
Civil Works for Sludge Treatment Facilities and 132kV Primary Substation
Anticipated Date of Completion: 23 January 2024

The works include civil works for sludge treatment facilities including sludge dewatering building, combined heat and power building, sludge digesters, biogas holding tanks, thermal hydrolysis pre-treatment system, etc.; civil works for ultraviolet system no. 1 and associated pumping station no. 1; construction of 132kV primary substation; and construction of other ancillary facilities including workshops no. 2, underpass, road works, pipeworks, etc.
Sidestream Treatment Facilities and E&M Works for Sludge Treatment Facilities
Anticipated Date of Completion: 4 April 2024

The works include electrical and mechanical (E&M) installation works for sludge treatment facilities including sludge dewatering building, combined heat and power building, sludge digesters, biogas holding tanks, thermal hydrolysis process system, etc.; E&M installation works for ultraviolet system no. 1 and associated pumping station no. 1; design and construction of sidestream treatment facilities; and testing and commissioning for the associated systems.
E&M Works for Sewage Treatment Facilities
Anticipated Date of Completion: 14 May 2024

The works include electrical and mechanical installation works for sewage treatment facilities including inlet works no. 1, primary sedimentation tanks, bioreactors and pre-treatment screen chamber, membrane tanks and building no. 2, etc.; and testing and commissioning for the associated systems.
Civil Works for Sewage Treatment Facilities
Anticipated Date of Completion: 26 March 2024

The works include Civil works for Sewage Treatment Facilities including Inlet Works No. 1, Primary Sedimentation Tanks No. 1 - 4, Bioreactor No. 2A & 2B, Membrane Facilities Building No. 2, SAS Pumping Station, auxiliary facilities (temporary chemical dosing system, concrete plinth for deodorisation systems, chemical systems no. 1 and no. 2, FS and sprinkler pumping room, emergency generator house, street fire hydrant pump room and flowmeter chambers) and the associated works.