Post on 20-Aug-2020
Vision, Mission and Values
Organisation2.1 Organisation Chart2.2 Staff Establishment
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Financial Data3.1 Operating Expenditure3.2 Sewage Services Operating Cost Recovery Rate3.3 Sewage Charge3.4 Estimated Expenditure for Capital Works Projects
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Work Overview 4.1 Sewage Treatment4.2 Flood Prevention4.3 Operations and Maintenance4.4 Rehabilitation and Replacement of Stormwater Drains and Sewers
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7 - 1819 - 29
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Utilisation of RenewableEnergy
Key Statistics and Data
Public Education
Contact Us
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Contents
Drainage Services Department in Brief 2018-19
1. Our Vision, Mission and Values
Vision
To provide world-class wastewater and stormwater drainage services enabling the sustainable development of Hong Kong
Mission
Values
● Improving drainage services in a cost-effective and environmentally responsible manner
● Enhancing a caring, harmonious, safe and healthy work environment that fosters staff development and a mindset for change
● Strengthening relationships with community, industry and worldwide counterparts
● Customer Satisfaction
● Quality
● Commitment
● Teamwork
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2. Organisation2.1 Organisation Chart
DSD HEADQUARTERSDirector of Drainage
Services
Deputy Director of Drainage Services
Assistant Director /
Projects and Development
Assistant Director /
Operations and Maintenance
Assistant Director /
Electrical and Mechanical
Assistant Director / Sewage Services
Sewerage Projects Division
Drainage Projects Division
Consultants Management
Division
Project Management
Division
Projects and Development
Branch
Hong Kong and Islands
Division
Mainland South
Division
Mainland North
Division
Land Drainage Division
Operations and Maintenance
Branch
Harbour Area Treatment
Scheme Division Customer Services
and Asset Management
Section
Operation Section
Sewage Revenue Section
Sewage Services Branch
Sewage Treatment Division 1
Sewage Treatment Division 2
Electrical and Mechanical
Projects Division
Electrical and Mechanical
Branch
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Drainage Services Department in Brief 2018-19
Directorate 18
Professional 327
Engineer 255Electrical & Mechanical Engineer 48Electronics Engineer 2Shift Charge Engineer 2Quantity Surveyor 1Land Surveyor 2Landscape Architect 2Environmental Protection Officer 3Chemist 12
Technical & Site Supervisory 908
General & Common Grades 538
Model Scale I 195
Total 1,986
2.2 Staff Establishment
4
Recurrent Expenditure 2016-17 2017-18 2018-19Personal Emoluments andPersonnel Related Expenses 950.1 955.9 1,004.6
Departmental Expenses 1,614.0 1,653.8 1,729.0
Total 2,564.1 2,609.7 2,733.6
2016-17 2017-18 2018-19 (2)
Revenue of Sewage Charge and Trade Effluent Surcharge ($M)
1,392.9 1,539.7 1,551.2
Expenditure of Sewage Charge and Trade Effluent Surcharge ($M) (1)
2,295.7 2,288.9 2,503.1
Operating Cost Recovery Rate (%) 60.7 67.3 62.0
(in $M)
3. Financial Data
3.1 Operating Expenditure
3.2 Sewage Services Operating Cost Recovery Rate
Notes:
1. Depreciation is not recovered through the Sewage Charge and Trade Effluent Surcharge at present
2. The figures for 2018-19 are estimated and the actual figures will be finalised by 2019 Q4
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Drainage Services Department in Brief 2018-19
2016 2017 2018Sewage Charge Account 2,724 2,760 2,806
Trade Effluent Surcharge (TES) Account
27 28 29
Number of Accounts
3.3 Sewage Charge
(in thousand, as at December 31 of each year)
Projectsin hand
Sewage Treatment
Flood Prevention Total
No. Cost ($B) No. Cost
($B) No. Cost ($B)
Cat. A (1) 22 16.3 1 1.2 23 17.5
Cat. B (2) 41 72.9 19 28.7 60 101.7
Total 63 89.2 20 30.0 83 119.2
3.4 Estimated Expenditure for Capital Works Projects
1. All Cat. A projects with works/consultancies in progress are given in Money-of-the-Day price
2. All Cat. B projects are given in September 2018 price level
Notes:
The sewage services charges are composed of Sewage Charge and Trade Effluent Surcharge. There are currently 27 trades required to pay the Trade Effluent Surcharge. Since 1 April 2017, the unit rate of Sewage Charge per cubic metre of water supplied remains at $2.92.
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4. Work Overview
4.1 Sewage Treatment
Services for sewage treatment include operation and maintenance of sewage treatment facilities, upgrading the existing facilities and building new facilities.
Sewerage Master Plan StudiesThe regional sewerage infrastructures are mainly proposed under the 16 Sewerage Master Plans (SMPs) and the subsequent 8 SMP Reviews.
Stanley Sewage Treatment Works
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Drainage Services Department in Brief 2018-19
Harbour Area Treatment SchemeHarbour Area Treatment Scheme (HATS) is one of the most important infrastructure programme undertaken by the Government to improve the water quality of Victoria Harbour, and thus enhancing the sustainable development of Hong Kong.
Layout Plan of HATS
Stonecutters Island Sewage Treatment Works
Sai Ying Pun
8
Tunnel Drive Length (km) Size Level
(mPD)Chai Wan to Shau Kei Wan 2.3 Circular tunnel of
cross-sectional area 1.13 m2 -121 to -126
Shau Kei Wan to Kwun Tong 2.6 Circular tunnel of
cross-sectional area 1.43 m2 -76 to -121
Tseung Kwan O to Kwun Tong 5.3 Twin circular tunnels of cross-
sectional area 1.43 m2 each -76 to -87
Kwun Tong to To Kwa Wan 3.4 Circular tunnel of
cross-sectional area 6.25 m2 -136 to -143
To Kwa Wan to Stonecutters Island 5.6 Circular tunnel of
cross-sectional area 9.84 m2 -125 to -136
Kwai Chung to Tsing Yi 0.8 Circular tunnel of cross-sectional area 3.84 m2 -132 to -134
Tsing Yi to Stonecutters Island 3.6 Circular tunnel of
cross-sectional area 4.37 m2 -125 to -132
Information of Sewage Conveyance Tunnel
Commissioning Date: December 2001Project Cost: About $8.2 B
Harbour Area Treatment Scheme Stage 1 Project Scope:● Constructing Stonecutters Island Sewage Treatment Works
(SCISTW) at a footprint of about 10 hectares and a design treatment capacity of 1.7 million m3 per day
● Constructing about 23-km-long deep tunnel to convey the sewage from Kowloon and the north-eastern part of Hong Kong Island to SCISTW for chemically enhanced primary treatment (CEPT)
● Upgrading 7 Preliminary Treatment Works (PTW) in Tsing Yi, Kwai Chung, To Kwa Wan, Kwun Tong, Tseung Kwan O, Shau Kei Wan and Chai Wan
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Drainage Services Department in Brief 2018-19
Information of Sewage Conveyance Tunnel
Project Scope:
● Enhancing the design treatment capacity of SCISTW to 2.45 million m3 per day and the addition of disinfection facilities
● Constructing about 21-km-long deep tunnel to convey the sewage from the northern and south-western parts of Hong Kong Island to SCISTW for CEPT
● Upgrading 8 existing PTWs in North Point, Wan Chai East, Central, Sandy Bay, Cyberport, Wah Fu, Aberdeen and Ap Lei Chau
Commissioning Date: December 2015Project Cost: About $17.5 B
Harbour Area Treatment Scheme Stage 2A
Tunnel Drive Length (km) Size Level
(mPD)
North Point to Stonecutters Island
12
● 7.5-km-long twin oval tunnels of cross-sectional area 1.7 to 5.6 m2 each
● 4.5-km-long single circular tunnel of cross-sectional area 7.1 m2
-139to
-163
Aberdeen toSai Ying Pun 7.5
Twin oval tunnels of cross-sectional area 1.5 to 2.1 m2
each
-73 to -123
Ap Lei Chau to Aberdeen 1.3 Twin circular tunnels of cross-
sectional area 0.28 m2 each+2 to -99
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Harbour Area Treatment Scheme Stage 2B
Project Scope:● Uplifting the treatment capacity of the secondary sewage
treatment works at Mui Wo to 3,700 m3 per day
● Upgrading the sludge treatment and deodourisation facilities, and landscaping and greening of the sewage treatment works
Completion Date: April 2018Project Cost: About $967 M
Upgrading of Mui Wo Sewage Treatment Works
Mui Wo Sewage Treatment Works
HATS Stage 2B involves construction of biological sewage treatment facilities on Stonecutters Island for all HATS flow. It is kept under review taking into account the water quality situation and the latest technological development in biological treatment.
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Drainage Services Department in Brief 2018-19
Project Scope:● Expanding and upgrading the preliminary sewage
treatment works to chemically enhanced primary treatment with disinfection to improve the effluent quality
● Uplifting the treatment capacity to 200,000 m3 per day
● Constructing ancillary facilities such as administration bui ld ing, maintenance workshop, laborator ies, odour treatment facilities, sludge treatment facilities, architectural and landscaping works
Upgrading of San Wai Sewage Treatment Works
Project Progress:
Project Cost: About $3.14 B
The Design, Build and Operate Contract commenced in May 2016 and targeted for completion of construction in 2020. The Contractor is responsible for design and construction of the San Wai Sewage Treatment Works, and operation of the facilities for 15 years after commissioning.
Illustration of the completed San Wai Sewage Treatment Works
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Illustration of the completed Kwun Tong Sewage Pumping Station
Project Scope:● Enhancing Kwun Tong Sewage Pumping Station to
provide a balancing facility with a capacity of 16,000 m3 and its associated facilities
● Providing a plant house with ventilation system and landscaped deck at the roof
● Providing deodourisation facilities and ancillary works
Enhancement Works for Kwun Tong Sewage Pumping Station
Project Progress:The works commenced in December 2017 and targeted for completion in 2022.
Project Cost: About $1.05 B
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Drainage Services Department in Brief 2018-19
Project Scope:● Reconstructing the existing secondary sewage treatment
works at Sha Tau Kok to increase its capacity to 5,000 m3 per day
● Constructing approximately 1.7 km of submarine outfall with diameter 450 mm
● Decommissioning the existing sewage pumping station and associated rising mains
Project Progress: The works commenced in November 2018 and targeted for completion in 2025.
Expansion of Sha Tau Kok Sewage Treatment Works, Phase 1
Project Cost: About $2.04 B
Illustration of the completed Phase 1 Sha Tau Kok Sewage Treatment Works
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Project Scope:● Uplifting the treatment capacity of existing Shek Wu Hui
Sewage Treatment Works from 93,000 m3 to 190,000 m3 per day in phases
● Upgrading the sewage treatment level from existing secondary to tertiary
● Improving environmental performance of the existing plant, including odour control and landscaping works
Shek Wu Hui Effluent Polishing Plant
Preliminary design layout of Shek Wu Hui Effluent Polishing Plant
Project Progress:The Advance Works commenced in mid-2015 and are anticipated to be completed in 2019 Q4. The Main Works will be implemented in three phases with Phase 1 starting in 2019 Q3 targeting for completion of the final phase by 2034.
Project Cost: About $500 M (for Advance Works, Investigation and Design)About $13.2 B (for Main Works)
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Drainage Services Department in Brief 2018-19
Project Scope:Relocating Sha Tin Secondary Sewage Treatment Works to caverns inside Nui Po Shan for handling sewage treatment capacity up to 340,000 m3 per day. The existing site will then be vacated for beneficial uses.
Project Progress: Stage 1 Works includes site preparation and access tunnel construction commenced in February 2019. The remaining construction works will be implemented in stages. The total construction period of the project was estimated to be 13 years.
Relocation of Sha Tin Sewage Treatment Works to Caverns
Project Cost of Stage 1 Works: About $2.08 B
Sha Tin Sewage Treatment Works and Future Cavern Sewage Treatment Works
Future Cavern Sewage Treatment Works Existing Sha Tin
Sewage Treatment Works
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Project Scope:● Uplifting the treatment capacity of existing Yuen Long
Sewage Treatment Works from 70,000 m3 to 150,000 m3 per day
● Upgrading the sewage treatment level from existing secondary to tertiary to protect the water quality in Deep Bay
● Improving environmental performance of the existing plant, including odour control and landscaping works
Yuen Long Effluent Polishing Plant
Project Cost of Stage 1 Works:
About $6.8 B
Project Progress: The upgrading works will be implemented in 2 stages. Subject to funding approval, the construction of Stage 1 Works is scheduled for commencement in 2020 and targeted for completion in 2027.
Preliminary design layout of Yuen Long Effluent Polishing Plant
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Drainage Services Department in Brief 2018-19
Project Progress: Subject to funding approval, the works will commence in 2020 and target for completion in 2025.
Project Progress: Subject to funding approval, the works will commence in 2020 and target for completion in 2027.
Upgrading of Cheung Chau Sewage Treatment Works
Upgrading of West Kowloon and Tsuen Wan Sewerage – Phase 2
Project Cost:
About $2.67 B
Project Cost:
About $2.29 B
Project Scope:● Increasing the treatment capacity of Cheung Chau Sewage
Treatment Works to 9,800 m3 per day
● Upgrading the sewage treatment level from primary to secondary
Project Scope:● Constructing approximately 33.5 km of gravity sewers
● Providing internal lining at 28 existing sewer crossings within stormwater box culverts
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4.2 Flood Prevention
Study Area Status1 Yuen Long and North District Completed in 20112 West Kowloon
Completed in 20153 East Kowloon4 Tai Po
Completed in 20175 Sha Tin and Sai Kung6 Northern Hong Kong Island(1) Completed in 20197 Lantau and Outlying Islands
In progress, anticipatedto complete in 20208 Tuen Mun, Tsuen Wan and
Kwai Tsing9 Tseung Kwan O
Under planning10 South Hong Kong Island(2)
Drainage Master Plan (DMP) Review StudiesSince 2008, DSD has commenced a series of DMP Review Studies and Drainage Studies, which are summarised as follows:
Stormwater drainage services include implementation of flood prevention works, operation and maintenance of stormwater drains and associated facilities.
DMP Review Studies
1. The drainage study for Happy Valley was completed in 2011 2. The drainage study for Repulse Bay and Tai Tam is in progress and
anticipated to be completed in 2020
Notes:
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Drainage Services Department in Brief 2018-19
Since 1995, DSD has eliminated 125 flooding blackspots. There are currently 6 flooding blackspots in Hong Kong. The drainage improvement works for 2 of them have been completed and their effectiveness is being monitored. Subject to satisfactory performance, these 2 flooding blackspots will be eliminated in due course. For the remaining 4 flooding blackspots, the first-stage improvement works have been completed while the next stage improvement works are under planning and design.
Location Situation
● Ting Kok Road – Shuen Wan Chim Uk to Wong Yue Tan, Tai Po
● Morrison Hill Road J/O Lap Tak Lane, Wan Chai
Improvement works have been completed and the effectiveness is under monitoring
● Lam Tsuen Valley Basin, Tai Po● Shek Wu Wai, San Tin, Yuen Long● Chatham Road South between Granville Road and Austin Avenue,
Yau Tsim Mong● Pok Fu Lam Village, Southern
First-stage improvementworks have been completed. Works for the next stage are under planning and design
Information of the 6 Flooding Blackspots
Elimination of Flooding Blackspots
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Based on passage of typhoons in the past, DSD has identified 7 Storm Surge Spots, which are vulnerable to seawater inundation due to rise of sea level caused by storm surge, and 3 Overtopping Wave Spots, which are vulnerable to flooding due to wave overtopping the seawall. DSD is formulating and progressively implementing measures to combat the problems with other departments.
1. Tai O2. Tuen Mun Luen On San Tsuen3. Tuen Mun Kar Wo Lei4. Sham Tseng San Tsuen
1. Tseung Kwan O South 2. Heng Fa Chuen3. South Horizons
5. Lei Yue Mun6. Sai Kung Nam Wai7. Yuen Long North West Low-lying Coastal Area
Storm Surge Spots and Overtopping Wave Spots
Storm Surge Spots
Overtopping Wave Spots
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Drainage Services Department in Brief 2018-19
Completed Under planning / design / construction
River Training About 108 km About 12 km
Drainage Improvement About 94 km About 32 km
Drainage Tunnel About 21 km 3 km
Stormwater Storage Scheme 4 11
Total Project Cost About $29.6 B About $30.0 B
Flood Prevention Works
Happy Valley Underground Stormwater Storage Tank
Our flood prevention works are summarised as follows:
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Tai Hang Tung
Stormwater Storage Scheme
Sheung Wan
Stormwater Storage Scheme
Happy Valley Underground Stormwater
Storage Scheme
On Sau Road
Stormwater Storage Scheme
Project Cost About$290 M
About$200 M
About$1.07 B
About $60 M
CommissioningDate 2004 2009 2017 2018
Capacity 100,000 m 3 9,380 m 3 60,000 m 3 18,000 m 3
Design PumpingCapacity
1.9 m 3 /s 6.0 m 3 /s 1.5 m 3 /s By gravity
Plan Area 17,680 m 2 1,580 m 2 24,000 m 2 4,700 m 2
Average Internal Depth 7.5 m 5.9 m 3 m 4.6 m
Other Features240 m long overflow weir in total
—15 nos. of 3 m long movable overflow weir
—
Stormwater Storage Schemes
Kai Tak Transfer Scheme
Hong Kong West Drainage
Tunnel
Lai Chi Kok Drainage Tunnel
Tsuen WanDrainage Tunnel
Project Cost About$380 M
About$3.38 B
About$1.67 B
About$1.49 B
Commission-ing Date 2004 2012 2012 2013
Length 1.5 km 10.5 km 3.7 km 5.1 kmDiameter 4.4 m 6.25 m to 7.25 m 4.9 m 6.5 mOther Features — ● 34 intake
structures ● Outfall at Cyberport
● 6 intake structures● 1 stilling basin● Outfall at Stonecutters Island
● 3 intake structures● Outfall at
Yau Kom Tau
Drainage Tunnels
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Drainage Services Department in Brief 2018-19
District Village District Village
Yuen Long
Kau Hui (Nam Pin Wai) Kam Tin Sha Po Tsuen
Ma Tin Tsuen Ngau Tam Mei
Po Wai
Shui Pin Wai Chuk Yuen Tsuen and Ha San Wai
Wang Chau Village
San Tin
Chau Tau
Shui Pin Tsuen Mai Po Lo Wai and Mai Po San Tsuen
Tai Kiu San Tin
Tin Shui Wai
Lo Uk Tsuen Sheung Shui
Sheung Shui Tsuen
Sik Kong Tsuen Tai Tau Leng and Tsung Pak Long
Sik Kong WaiSha Tin
Tsang Tai Uk
Kiu Tau Wai Fo Tan
Ha Mei San Tsuen Tai Po Shui WaiSheung Cheung Wai Tuen Mun Tsing Chung Koon
Fung Shui Lane Lantau Island
Tai O Wing On Street
Tai O Tai Ping Street
Village Flood Protection Schemes 27 Village Flood Protection Schemes in operation
Illustration of Village Flood Protection Scheme
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Stage I to Stage III Stage IV
Project Scope
Straightening the Lok Ma Chau bend and the Liu Pok bend, widening and deepening the remaining sections from Liu Pok bend to the estuary and the section upstream of the Liu Pok bend to the confluence with Ping Yuen River (about 13.5 km in total)
Improving the section of Shenzhen River between Ping Yuen River and Pak Fu Shan (about 4.5 km) and constructing a flood retention lake of 80,000 m3
Completion Date 1997 to 2006 2017
Project Cost About $1.8 B About $0.84 B
Shenzhen River Regulation Project
Shenzhen River Regulation Project Stage IVFlood Retention Lake
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Drainage Services Department in Brief 2018-19
Inter-reservoirs Transfer Scheme
Constructing a water tunnel of about 2.8 km with 3 m diameter from the Kowloon Byewash Reservoir to the Lower Shing Mun Reservoir with a view to achieving dual purposes in flood protection and water conservation.
Project Progress: The works commenced in February 2019 and targeted for completion in 2022.
Project Cost: About $1.22 B
West Kowloon Drainage Improvement – Inter-reservoirs Transfer Scheme
Project Scope:
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Revitalising Water Bodies The way forward: Revitalising Water Bodies to Achieve Sustainable Development
Promoting water-friendly culture and activities Creating green habitats Providing more urban open space Mitigating heat island effect Coping with climate change Making reference to the concept of “Sponge City” –
following the nature with flexibility
lIIustration of the concept of "Sponge City"
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Drainage Services Department in Brief 2018-19
Upstream Section Midstream Section
Project Scope
● Reconstructing and rehabilitating a section of Kai Tak River of about 600 m long from Po Kong Village Road to Tung Kwong Road
● Constructing a box culvert of about 400 m long alongside the Kai Tak River from Wong Tai Sin Police Station to Tung Tai Lane
● Conducting landscaping works
● Reconstructing and rehabilitating a section of Kai Tak River of about 500 m long from Tung Kwong Road to Prince Edward Road East
● Conducting landscaping works
Commencement Date 2011 2013
CompletionDate 2018 2017
Project Cost About $1.6 B About $1.2 B
Kai Tak River Improvement Works
Note: The construction and upgrading of the downstream section of Kai Tak River, being undertaken by CEDD, commenced in 2013 and were substantially completed in 2018 at a project cost of about $2.5 B
Revitalised Kai Tak River28
● Revitalising the existing 1 km long Tsui Ping Nullah alongside King Yip Street, King Yip Lane and Tsui Ping Road
● Beautifying the adjoining walkways, enhancing connectivity and walkability by means of provision of walkways and landscaped decks beside the river to match with the project theme
Project Progress: Subject to funding approval, the works will commence in end-2019 and target for completion in end-2023.
Project Cost: About $1.76 B
Revitalisation of Tsui Ping River
Project Scope:
Illustration of water gate at the revitalised Tsui Ping River
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Drainage Services Department in Brief 2018-19
4.3 Operations and Maintenance
Emergency Control Centre
Apart from conducting regular inspections and repairs of stormwater drains and sewers, DSD promptly cleans up pipes as necessary to keep the channels clear. During the period of 2018-19, DSD cleared 780 km of stormwater drains and 726 km of sewers over the territory. Our Drainage Hotline received about 36,400 cases and handled 36,130 cases within 24 hours after receipt of the case. Over 99% of the public were satisfied with our services.
Whenever a flooding report is received, whether it involves public or private channels, DSD usually attends the scene as soon as possible for clearing the blockage and take appropriate flood relieving measures in order to reduce the impact of flooding on the public. During severe weather, DSD would activate an Emergency Control Centre to co-ordinate and respond to unexpected incidents.
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4.4 Rehabilitation and Replacement of Stormwater Drains and Sewers
Aged pipe – exposure of reinforcement
Rehabilitated pipe
Project Progress: The works commenced in January 2018 and targeted for completion in 2022.
Project Scope:● Rehabilitating the existing trunk sewers (about 1.7 km long)
in Ngau Chi Wan, To Kwa Wan, Sha Tin and Sai Kung to reduce the risk of sewage leakage and to enhance the reliability of the sewerage system
● Constructing a new submarine trunk sewer across Sai Kung Hoi linking Sai Kung Town and Tui Min Hoi and constructing duplicate trunk sewers along Yuen Wo Road near Sha Tin Sewage Pumping Station
Project Cost: About $680 M
Rehabilitation of Trunk Sewers in Kowloon, Sha Tin and Sai Kung
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Drainage Services Department in Brief 2018-19
Rehabilitation of Underground Stormwater Drains and Sewers
● Conducting condition survey for about 168 km underground stormwater drains and 75 km underground sewers over the territory
● Rehabilitating about 41 km underground stormwater drains and 19 km underground sewers over the territory
Project Progress: Stage 1 works commenced in January 2019 and targeted for completion in 2022. Stage 2 and Stage 3 works will be implemented in stages starting from 2020.
Project Scope:
Project Cost: About $515 M (for Stage 1 works)
Totally Integrated Sonar and Closed-circuit TV Inspection System
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DSD strives to utilise renewable energy for combating climate change.
Total Generated Renewable Energy
Renewable Energy SystemsGenerating Capacity (kW) (1)
2016-17 2017-18 2018-19Biogas Combined Heat and Power Generators , Micro-turbines, Boilers and Duel Fuel Engines(2)
12,093 12,093 10,967
Solar Systems 1,323 1,392 1,435
Hydro-turbine — — 23
Total 13,416 13,485 12,425
2016-17 2017-18 2018-19
Total Generated Renewable Energy 21.7 28.2 28.5
Notes: 1. The generating capacities of the boilers refer to their thermal
generating capacities, while the generating capacities of other systems refer to their electricity generating capacities
2. One of the four dual fuel engines was demolished and would be replaced by a combined heat and power generator
5. Utilisation of Renewable Energy
(in million kWh)
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Drainage Services Department in Brief 2018-19
Solar Farm at Siu Ho Wan Sewage Treatment Works
Generation of Renewable Energy from Biogas
Commissioning Date: 2016
Project Details: The solar farm, comprising over 4,200 photovoltaic panels, has an installed generation capacity of 1,100 kilowatts
Background: The biogas produced in the course of sewage sludge treatment in sewage treatment works is a renewable energy source. It is converted to electricity and heat for in-house use by generators and boilers in the sewage treatment works.
Environmental Benefit: The renewable energy generated from biogas in 2018-19 amounted to 27.3 million kWh and the reduction of carbon dioxide emission exceeded 19,000 tonnes.
Environmental Benefits:● Electricity generated by the solar farm, which is supplied to
facilities inside the treatment works via the internal power distribution network, can be as much as 1.1 million kWh annually
● Annual reduction of carbon dioxide emission can reach about 770 tonnes
Project Cost: About $27 M
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1,832 km63 km
2,427 km363 km
21 km
4,706 kmTotal
6. Key Statistics and Data
● Sewers● Sewage tunnels
● Stormwater drains● Engineered channels● Drainage tunnels
Stormwater Drainage System
Sewerage System
Highest Hourly Rainfall 145.5 mm 7 June 2008
Highest Daily Total Rainfall 534.1 mm 19 July 1926
Highest Annual Total Rainfall 3343.0 mm 1997
Mean Annual Total Rainfall 2398.5 mm 1981-2010
Rainfall Record in Hong Kong
According to the Climatological Information Services in the website of Hong Kong Observatory:
Drainage System under DSD
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Drainage Services Department in Brief 2018-19
1824
441
Sewage Pumping StationsStormwater Pumping Stations
Total
25036
355
Facilities
Preliminary Treatment Works Primary Treatment Works Chemically Enhanced Primary Treatment (CEPT) Works Secondary Treatment WorksTertiary Treatment Works
Sewage Treatment Works 69
Kowloon City No. 1 Sewage Pumping Station
36
2016-17 2017-18 2018-19
By Preliminary Treatment 45 58 75
By Primary Treatment 5 5 6By Chemically Enhanced Primary Treatment 779 757 751
By Secondary Treatment 186 187 196
Total 1,015 1,007 1,028
Volume of Sewage Treated(in million m3)
Notes:
1. Sewerage network in Hong Kong is currently serving over 93% of the population (based on the number of domestic water bill accounts with sewage charges levied)
2. The volume of sewage treated by tertiary treatment in 2018-19 is about 0.16 million m3
3. Daily quantity of sewage sludge generated in 2018-19 is about 1,075 tonnes
Major Sewage / Stormwater Pumping Stations Design Pumping Capacity (m3/s)
Sewage Pumping StationsStonecutters Island Main Pumping Station 63.3Cheung Sha Wan Sewage Pumping Station 14.7
Stormwater Pumping StationsSan Tin Stormwater Pumping Station 8.0
Chuk Yuen Stormwater Pumping Station 8.0
Design Pumping Capacity of Major Pumping Stations
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Drainage Services Department in Brief 2018-19
Major Sewage Treatment Works Design Treatment Capacity (m 3 /day)
Preliminary Treatment WorksNorth West Kowloon Preliminary Treatment Works* 450,800
Kwun Tong Preliminary Treatment Works* 333,000San Wai Preliminary Treatment Works 164,000
Primary Treatment WorksCheung Chau Sewage Treatment Works 4,000Tai O Imhoff Tank 1,200
Chemically Enhanced Primary Treatment WorksStonecutters Island SewageTreatment Works 2,450,000
Pillar Point Sewage Treatment Works 241,000Siu Ho Wan Sewage Treatment Works 180,000Sham Tseng Sewage Treatment Works 16,800
Secondary Treatment WorksSha Tin Sewage Treatment Works 340,000Tai Po Sewage Treatment Works 120,000Shek Wu Hui Sewage Treatment Works 93,000Yuen Long Sewage Treatment Works 70,000Stanley Sewage Treatment Works 11,600Sai Kung Treatment Works 8,000
Tertiary Treatment WorksNgong Ping Sewage Treatment Works 1,100
Design Treatment Capacity of Major Sewage Treatment Works
* The sewage treated by this preliminary treatment works is further conveyed to Stonecutters Island Sewage Treatment Works for chemically enhanced primary treatment
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7. Public Education
Schools or relevant organisations are welcome to visit our sewage treatment and flood prevention facilities through prior application. Please visit the following website for more information:http://www.dsd.gov.hk/EN/Education/Visit_to_DSD_Facilities/index.html
We will visit schools and introduce our work through presentations, videos and Question-and-Answer session. For details, please visit the following website:https://www.dsd.gov.hk/EN/Education/DSD_Outreach_Educational_Programme/index.html
Lai Chi Kok Drainage Tunnel Equipment Enclosure
Visit to DSD Facilities
DSD Outreach Educational Programme
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Drainage Services Department in Brief 2018-19
8. Contact Us
Drainage Hotline2300 1110
Sewage Services Charges Enquiries2834 9432
General Enquiries2877 0660
Websitehttp://www.dsd.gov.hk
E-mailenquiry@dsd.gov.hk
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