waterlink issue no - wsd.gov.hk · institut teknologi bandung, indonesia 14-6-2013 plover cover...

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Wa S E P T E M B E R 2 0 1 3 I S S U E terlink 66 NEWS ON CUSTOMER LIAISON GROUP (CLG) Contents NEWS ON CUSTOMER LIAISON GROUP Sixty-sixth Meeting FOCUS WSD wins 5 awards in the Civil Service Outstanding Service Award Scheme 2013 UPDATES Wave-powered Cleaning System INTERFLOW VISITS Delegations The 66th meeting of the CLG was held on 31 May 2013. A presentation was given to members on Opinion Survey on Water Supplies Services 2012. The survey covered both domestic and commercial customers. Over 90% of interviewees rated the overall services provided by WSD from “quite satisfied” to “very satisfied”. Services of other utility companies in Hong Kong, including the Hong Kong Electric Co. Ltd., China Light & Power Co. Ltd. and Hong Kong & China Gas Co. Ltd., were also taken as benchmark. Comparing with the results from the survey in 2007, WSD rose from second to first position among the public utilities for domestic customers while remained third for commercial customers. The three most satisfying aspects for domestic customers were “convenience of payment method”, “advance notification prior to planned suspension of fresh water supply” and “adequacy of channels of notification for planned suspension of fresh water supply”. For commercial customers, the three most satisfying aspects were “convenience of payment method”, “advance notification prior to planned suspension of fresh water supply” and “clarity and comprehensiveness of water bill information”. Although the quality of fresh water supplied by WSD is in 100% compliance with World Health Organization’s (WHO’s) Guidelines for Drinking-water Quality, “purity” and “clarity” of fresh water were the two least satisfying aspects. To ensure good quality of fresh water, property owners and their property management agents were reminded of proper maintenance of the plumbing systems in the building. Members were also briefed on “Expansion of Tai Po Water Treatment Works and Ancillary Raw Water and Fresh Water Transfer Facilities – Part 2 Works”. To enhance the overall resilience, flexibility and reliability of the water supply system in Hong Kong, WSD planned to expand the treatment capacity of the Tai Po Water Treatment Works (TPWTW) from the original 250,000 cubic metres/day to 800,000 cubic metres/day in 2 phases. Upon completion of the project, the TPWTW would be able to take up part of the existing load of Sha Tin Water Treatment Works to supply fresh water to a significant part of Kowloon, as well as the Central and Western districts on Hong Kong Island. WSD had successfully expanded the treatment capacity of TPWTW from 250,000 cubic metres/day to 400,000 cubic metres/day in December 2011 under Part 1 Works. Part 2 Works commenced in February this year to further expand the treatment capacity to 800,000 cubic metres/day. The storage capacity of the existing Butterfly Valley Fresh Water Primary Service Reservoir would be enlarged from 40,000 cubic metres to 120,000 cubic metres. In addition, around 1,000 metres of associated fresh water mains would be laid in Sham Shui Po and Kowloon City. Part 2 Works would be completed in May 2017. 66th Meeting Published by Water Supplies Department

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Wave-powered Cleaning SystemThere are about twenty seafront seawater pumping stations supplying seawater to Hong Kong residents for flushing purposes. At the suction intake of these seawater pumping stations, screens are installed to remove debris from seawater to avoid blockage and damage to the pumping system. However, the marine organisms grow on the intake screens at an astonishing speed and cause blockage of screens. This will result in lower efficiency of pumping stations and higher energy consumption. As such, the frontline staff has to clean and remove the marine growth from the intake screens frequently by using high-pressure water jets. It indeed consumes considerable amount of time and resources.

Water Supplies Department (WSD) has developed a Wave-powered Cleaning System to prevent marine organisms from growing on the intake screens. This system basically consists of a floating device connected with a wired brush. The design aptly employs the power of waves and tidal action to drive the wired brush so that it can scrub up and down of the intake screens 24 hours a day. The brushing action is to deter marine organisms from attaching themselves on the intake screens. An analogy example is that grass does not grow on areas where people keep on treading on them.

Due to the different surrounding environment of the seawater pumping stations, the designs and sizes of their suction intakes also vary. Therefore, three different intake screen cleaning systems (i.e. floating-panel, floating-ball and pulley type) are

designed to suit the various suction intakes.

Wave-powered Cleaning System is driven by renewable energy (i.e. waves and tides). It does not require chemicals or consume power. This design is environmentally friendly, simple, low-cost and effective. The use of the automatic round-the-clock cleaning system not only reduces the cleaning time and resources, but also helps enhance the efficiency of pumping station and save energy. At present, there are four seawater pumping stations installed with this device and later on it will be extended to other seawater pumping stations.

WSD wins 5 awards in the Civil Service Outstanding Service Award Scheme 2013

Waterlink • September 2013 • Issue 66Waterlink • September 2013 • Issue 66FOCUS UPDATES

DelegationsDuring the past several months, the following delegations visited the department to exchange experience and knowledge on the latest water treatment technologies and water supply management:

INTERFLOW VISITS

• Shells grown on an intake screen

• Intake screen cleaned by high-pressure water jet

ENQUIRIES

24-hour telephone enquiry hotline: 2824 5000

Fax hotlines: 2519 3864 (for water supply and general matters) 2802 7333 (for billing and consumership matters)

Website address: http://www.wsd.gov.hk

E-mail address: [email protected]

Correspondence address:Water Supplies Department, Immigration Tower, 7 Gloucester Road, Wan Chai, Hong Kong (Fax: 2824 0578)

Editor:Public Relations Manager / Public Relations Unit, Water Supplies Department

Free copies of Waterlink can be obtained from the following locations:

• CustomerEnquiryCentresofthe Water Supplies Department

• PublicEnquiryServicesCentresofDistrictOffices/ Home Affairs Department

All WSD publications can be browsed on the WSD website.

• Demonstration of the operation of wave-powered cleaning device in the sea

(3) Team Award (Internal Service) – Silver Prize [Biosensing Alert System by Water Science Division](4) Team Award (Internal Service) – Bronze Prize [Inline Hydroelectric Generating System in Confined Condition by Project Development Unit](5) Team Award (Internal Service) – Special Citation (Innovation) [Wave-powered Cleaning System by Energy Management Unit]

The adjudication panel complimented our Gold Prize’s awardee for developing a simple and creative Wave Power Cleaning System which enhanced the efficiency of pumping stations and saved the manpower in cleaning the intake screens. The panel especially appreciated the teamwork and dedication showcased throughout the project, which should be a good role model for other fellows.

The prize presentation ceremony was held on 6 September 2013.Delegation Date of Visit Location

Delegation from Shenyang 4-6-2013 WSD HeadquartersWater Resources Education Centre

Institut Teknologi Bandung, Indonesia 14-6-2013 Plover Cover Reservoir

Tai Tam Tuk Eco Education Centre 6-7-2013 Tai Tam Tuk Raw Water Pumping Station

Shenzhen Water (Group) Co., Ltd. 8-7-2013 WSD Headquarters

Rizhao International Ocean City, Shan Dong 11-7-2013 Tuen Mun Salt Water Pumping Station

The Development Research Center of Guangxi Region Municipal People’s Government 19-7-2013 WSD Headquarters

Pearl River Water Resources Commission from Guangzhou 25-7-2013 Ma On Shan Water Treatment Works

Hong Kong Institute of Educational Research,The Chinese University of Hong Kong 31-7-2013 Tai Tam Tuk Raw Water Pumping Station

The Chartered Institution of Water and Environmental Management 24-8-2013 Tuen Mun Water Treatment Works

Metropolitan Waterworks Authority of Bangkok Thailand 29-8-2013 R&R work site at Siu Lang Shui, Tuen Mun

(9/WSD/10)

Shenzhen Dongshen Water Resources Protection Office 6-9-2013 WSD Headquarters

The NPC Standing Committee, Guangzhou Province 9-9-2013 Plover Cover ReservoirHigh Island Reservoir

Electrical and Mechanical Services Department 10-9-2013 Lung Cheung Road Mechanical & Electrical WorkshopTai Wan Salt Water Pumping Station

Singapore Polytechnic 18-9-2013 Shat Tin Water Treatment Works

This year, WSD won five awards in the Scheme. They are:(1) Departmental Service Enhancement Award (Large Department) - Bronze Prize (2) Team Award (Internal Service) – Gold Prize [Wave-powered Cleaning System by Energy Management Unit]

Since 1999, the Civil Service Bureau has been organising the Civil Service Outstanding Service Award Scheme on a biennial basis. The objectives of the Scheme are to recognise the efforts of departments and teams which provide excellent service, to promote a customer-focused culture in the civil service, and to inspire departments and teams for continuous improvement in the delivery of public services.

1

2

34

5

• 3 different types of Wave-powered Cleaning Device: Floating Panel (left), Floating Ball (middle), Pulley Type (right)

Adjudicators commented that the WSD showed a strong commitment in excellence with a solid foundation in science. The innovative Biosensing Alert System developed by the WSD has successfully safeguarded the quality of water supply and public health. Apart from striving for improvement in water quality, water supply stability and water efficiency, WSD proactively promoted educational activities on water conservation to encourage public participation in water saving.

WaS E P T E M B E R 2 0 1 3 I S S U E

terlink66

NEWS ON CUSTOMER LIAISON GROUP (CLG)

ContentsNEWS ON CUSTOMER LIAISON GROUPSixty-sixth Meeting

FOCUSWSD wins 5 awards inthe Civil Service Outstanding Service Award Scheme 2013

UPDATESWave-powered Cleaning System

INTERFLOW VISITSDelegations

The 66th meeting of the CLG was held on 31 May 2013. A presentation was given to members on Opinion Survey on Water Supplies Services 2012. The survey covered both domestic and commercial customers. Over 90% of interviewees rated the overall services provided by WSD from “quite satisfied” to “very satisfied”. Services of other utility companies in Hong Kong, including the Hong Kong Electric Co. Ltd., China Light & Power Co. Ltd. and Hong Kong & China Gas Co. Ltd., were also taken as benchmark. Comparing with the results from the survey in 2007, WSD rose from second to first position among the public utilities for domestic customers while remained third for commercial customers.

The three most satisfying aspects for domestic customers were “convenience of payment method”, “advance notification prior to planned suspension of fresh water supply” and “adequacy of channels of notification for planned suspension of fresh water supply”. For commercial customers, the three most satisfying aspects were “convenience of payment method”, “advance notification prior to planned suspension of fresh water supply” and “clarity and comprehensiveness of water bill information”.

Although the quality of fresh water supplied by WSD is in 100% compliance with World Health Organization’s (WHO’s) Guidelines for Drinking-water Quality, “purity” and “clarity” of fresh water

were the two least satisfying aspects. To ensure good quality of fresh water, property owners and their property management agents were reminded of proper maintenance of the plumbing systems

in the building.

Members were also briefed on “Expansion of Tai Po Water Treatment Works and Ancillary Raw Water and Fresh Water Transfer Facilities – Part 2 Works”. To enhance the overall resilience, flexibility and reliability of the water supply system in Hong Kong, WSD planned to expand the treatment capacity of the Tai Po Water Treatment Works (TPWTW) from the original 250,000 cubic metres/day to 800,000 cubic metres/day in 2 phases. Upon completion of the project, the TPWTW would be able to take up part of the existing load of Sha Tin Water Treatment Works to supply fresh water to a significant part of Kowloon, as well as the Central and Western districts on Hong Kong Island.

WSD had successfully expanded the treatment capacity of TPWTW from 250,000 cubic metres/day to 400,000 cubic metres/day in December 2011 under Part 1 Works. Part 2 Works commenced in February this year to further expand the treatment capacity to 800,000 cubic metres/day. The storage capacity of the existing Butterfly Valley Fresh Water Primary Service Reservoir would be enlarged from 40,000 cubic metres to 120,000 cubic metres. In addition, around 1,000 metres of associated fresh water mains would be laid in Sham Shui Po

and Kowloon City. Part 2 Works would be completed in May 2017.

66th Meeting

Published by Water Supplies Department

The 66th meeting of the CLG was held on 31 May 2013. A presentation was given to members on Opinion Survey on Water Supplies Services 2012. The survey covered both domestic and commercial customers. Over 90% of interviewees rated the overall services provided by WSD from “quite satisfied” to “very satisfied”. Services of other utility companies in Hong Kong, including the Hong Kong Electric Co. Ltd., China Light & Power Co. Ltd. and Hong Kong & China Gas Co. Ltd., were also taken as benchmark. Comparing with the results from the survey in 2007, WSD rose from second to first position among the public utilities for domestic customers while remained third for commercial customers.

The three most satisfying aspects for domestic customers were “convenience of payment method”, “advance notification prior to planned suspension of fresh water supply” and “adequacy of channels of notification for planned suspension of fresh water supply”. For commercial customers, the three most satisfying aspects were “convenience of payment method”, “advance notification prior to planned suspension of fresh water supply” and “clarity and comprehensiveness of water bill information”.

Although the quality of fresh water supplied by WSD is in 100% compliance with World Health Organization’s (WHO’s) Guidelines for Drinking-water Quality, “purity” and “clarity” of fresh water

were the two least satisfying aspects. To ensure good quality of fresh water, property owners and their property management agents were reminded of proper maintenance of the plumbing systems

in the building.

Members were also briefed on “Expansion of Tai Po Water Treatment Works and Ancillary Raw Water and Fresh Water Transfer Facilities – Part 2 Works”. To enhance the overall resilience, flexibility and reliability of the water supply system in Hong Kong, WSD planned to expand the treatment capacity of the Tai Po Water Treatment Works (TPWTW) from the original 250,000 cubic metres/day to 800,000 cubic metres/day in 2 phases. Upon completion of the project, the TPWTW would be able to take up part of the existing load of Sha Tin Water Treatment Works to supply fresh water to a significant part of Kowloon, as well as the Central and Western districts on Hong Kong Island.

WSD had successfully expanded the treatment capacity of TPWTW from 250,000 cubic metres/day to 400,000 cubic metres/day in December 2011 under Part 1 Works. Part 2 Works commenced in February this year to further expand the treatment capacity to 800,000 cubic metres/day. The storage capacity of the existing Butterfly Valley Fresh Water Primary Service Reservoir would be enlarged from 40,000 cubic metres to 120,000 cubic metres. In addition, around 1,000 metres of associated fresh water mains would be laid in Sham Shui Po

and Kowloon City. Part 2 Works would be completed in May 2017.

WaterlinkS E P T E M B E R 2 0 1 3 I S S U E 66

Published by Water Supplies Department

NEWS ON CUSTOMER LIAISON GROUP (CLG)

ContentsNEWS ON CUSTOMER LIAISON GROUPSixty-sixth Meeting

FOCUSWSD wins 5 awards inthe Civil Service Outstanding Service Award Scheme 2013

UPDATESWave-powered Cleaning System

INTERFLOW VISITSDelegations

66th Meeting

Wave-powered Cleaning SystemThere are about twenty seafront seawater pumping stations supplying seawater to Hong Kong residents for flushing purposes. At the suction intake of these seawater pumping stations, screens are installed to remove debris from seawater to avoid blockage and damage to the pumping system. However, the marine organisms grow on the intake screens at an astonishing speed and cause blockage of screens. This will result in lower efficiency of pumping stations and higher energy consumption. As such, the frontline staff has to clean and remove the marine growth from the intake screens frequently by using high-pressure water jets. It indeed consumes considerable amount of time and resources.

Water Supplies Department (WSD) has developed a Wave-powered Cleaning System to prevent marine organisms from growing on the intake screens. This system basically consists of a floating device connected with a wired brush. The design aptly employs the power of waves and tidal action to drive the wired brush so that it can scrub up and down of the intake screens 24 hours a day. The brushing action is to deter marine organisms from attaching themselves on the intake screens. An analogy example is that grass does not grow on areas where people keep on treading on them.

Due to the different surrounding environment of the seawater pumping stations, the designs and sizes of their suction intakes also vary. Therefore, three different intake screen cleaning systems (i.e. floating-panel, floating-ball and pulley type) are

designed to suit the various suction intakes.

Wave-powered Cleaning System is driven by renewable energy (i.e. waves and tides). It does not require chemicals or consume power. This design is environmentally friendly, simple, low-cost and effective. The use of the automatic round-the-clock cleaning system not only reduces the cleaning time and resources, but also helps enhance the efficiency of pumping station and save energy. At present, there are four seawater pumping stations installed with this device and later on it will be extended to other seawater pumping stations.

Waterlink • September 2013 • Issue 66UPDATES

DelegationsDuring the past several months, the following delegations visited the department to exchange experience and knowledge on the latest water treatment technologies and water supply management:

INTERFLOW VISITS

• Shells grown on an intake screen

• Intake screen cleaned by high-pressure water jet

ENQUIRIES

24-hour telephone enquiry hotline: 2824 5000

Fax hotlines: 2519 3864 (for water supply and general matters) 2802 7333 (for billing and consumership matters)

Website address: http://www.wsd.gov.hk

E-mail address: [email protected]

Correspondence address:Water Supplies Department, Immigration Tower, 7 Gloucester Road, Wan Chai, Hong Kong (Fax: 2824 0578)

Editor:Public Relations Manager / Public Relations Unit, Water Supplies Department

Free copies of Waterlink can be obtained from the following locations:

• CustomerEnquiryCentresofthe Water Supplies Department

• PublicEnquiryServicesCentresofDistrictOffices/ Home Affairs Department

All WSD publications can be browsed on the WSD website.

• Demonstration of the operation of wave-powered cleaning device in the sea

Delegation Date of Visit Location

Delegation from Shenyang 4-6-2013 WSD HeadquartersWater Resources Education Centre

Institut Teknologi Bandung, Indonesia 14-6-2013 Plover Cover Reservoir

Tai Tam Tuk Eco Education Centre 6-7-2013 Tai Tam Tuk Raw Water Pumping Station

Shenzhen Water (Group) Co., Ltd. 8-7-2013 WSD Headquarters

Rizhao International Ocean City, Shan Dong 11-7-2013 Tuen Mun Salt Water Pumping Station

The Development Research Center of Guangxi Region Municipal People’s Government 19-7-2013 WSD Headquarters

Pearl River Water Resources Commission from Guangzhou 25-7-2013 Ma On Shan Water Treatment Works

Hong Kong Institute of Educational Research,The Chinese University of Hong Kong 31-7-2013 Tai Tam Tuk Raw Water Pumping Station

The Chartered Institution of Water and Environmental Management 24-8-2013 Tuen Mun Water Treatment Works

Metropolitan Waterworks Authority of Bangkok Thailand 29-8-2013 R&R work site at Siu Lang Shui, Tuen Mun

(9/WSD/10)

Shenzhen Dongshen Water Resources Protection Office 6-9-2013 WSD Headquarters

The NPC Standing Committee, Guangzhou Province 9-9-2013 Plover Cover ReservoirHigh Island Reservoir

Electrical and Mechanical Services Department 10-9-2013 Lung Cheung Road Mechanical & Electrical WorkshopTai Wan Salt Water Pumping Station

Singapore Polytechnic 18-9-2013 Shat Tin Water Treatment Works

• 3 different types of Wave-powered Cleaning Device: Floating Panel (left), Floating Ball (middle), Pulley Type (right)

Waterlink • September 2013 • Issue 66FOCUS

WSD wins 5 awards in the Civil Service Outstanding Service Award Scheme 2013Since 1999, the Civil Service Bureau has been organising the Civil Service Outstanding Service Award Scheme on a biennial basis. The objectives of the Scheme are to recognise the efforts of departments and teams which provide excellent service, to promote a customer-focused culture in the civil service, and to inspire departments and teams for continuous improvement in the delivery of public services.

This year, WSD won five awards in the Scheme. They are:(1) Departmental Service Enhancement Award (Large Department) - Bronze Prize (2) Team Award (Internal Service) – Gold Prize [Wave-powered Cleaning System by Energy Management Unit]

(3) Team Award (Internal Service) – Silver Prize [Biosensing Alert System by Water Science Division](4) Team Award (Internal Service) – Bronze Prize [Inline Hydroelectric Generating System in Confined Condition by Project Development Unit](5) Team Award (Internal Service) – Special Citation (Innovation) [Wave-powered Cleaning System by Energy Management Unit]

Adjudicators commented that the WSD showed a strong commitment in excellence with a solid foundation in science. The innovative Biosensing Alert System developed by the WSD has successfully safeguarded the quality of water supply and public health. Apart from striving for improvement in water quality, water supply stability and water efficiency, WSD proactively promoted educational activities on water conservation to encourage public participation in water saving.

The adjudication panel complimented our Gold Prize’s awardee for developing a simple and creative Wave Power Cleaning System which enhanced the efficiency of pumping stations and saved the manpower in cleaning the intake screens. The panel especially appreciated the teamwork and dedication showcased throughout the project, which should be a good role model for other fellows.

The prize presentation ceremony was held on 6 September 2013.

1

2

34

5

The 66th meeting of the CLG was held on 31 May 2013. A presentation was given to members on Opinion Survey on Water Supplies Services 2012. The survey covered both domestic and commercial customers. Over 90% of interviewees rated the overall services provided by WSD from “quite satisfied” to “very satisfied”. Services of other utility companies in Hong Kong, including the Hong Kong Electric Co. Ltd., China Light & Power Co. Ltd. and Hong Kong & China Gas Co. Ltd., were also taken as benchmark. Comparing with the results from the survey in 2007, WSD rose from second to first position among the public utilities for domestic customers while remained third for commercial customers.

The three most satisfying aspects for domestic customers were “convenience of payment method”, “advance notification prior to planned suspension of fresh water supply” and “adequacy of channels of notification for planned suspension of fresh water supply”. For commercial customers, the three most satisfying aspects were “convenience of payment method”, “advance notification prior to planned suspension of fresh water supply” and “clarity and comprehensiveness of water bill information”.

Although the quality of fresh water supplied by WSD is in 100% compliance with World Health Organization’s (WHO’s) Guidelines for Drinking-water Quality, “purity” and “clarity” of fresh water

were the two least satisfying aspects. To ensure good quality of fresh water, property owners and their property management agents were reminded of proper maintenance of the plumbing systems

in the building.

Members were also briefed on “Expansion of Tai Po Water Treatment Works and Ancillary Raw Water and Fresh Water Transfer Facilities – Part 2 Works”. To enhance the overall resilience, flexibility and reliability of the water supply system in Hong Kong, WSD planned to expand the treatment capacity of the Tai Po Water Treatment Works (TPWTW) from the original 250,000 cubic metres/day to 800,000 cubic metres/day in 2 phases. Upon completion of the project, the TPWTW would be able to take up part of the existing load of Sha Tin Water Treatment Works to supply fresh water to a significant part of Kowloon, as well as the Central and Western districts on Hong Kong Island.

WSD had successfully expanded the treatment capacity of TPWTW from 250,000 cubic metres/day to 400,000 cubic metres/day in December 2011 under Part 1 Works. Part 2 Works commenced in February this year to further expand the treatment capacity to 800,000 cubic metres/day. The storage capacity of the existing Butterfly Valley Fresh Water Primary Service Reservoir would be enlarged from 40,000 cubic metres to 120,000 cubic metres. In addition, around 1,000 metres of associated fresh water mains would be laid in Sham Shui Po

and Kowloon City. Part 2 Works would be completed in May 2017.

WSD wins 5 awards in the Civil Service Outstanding Service Award Scheme 2013

Waterlink • September 2013 • Issue 66FOCUS

(3) Team Award (Internal Service) – Silver Prize [Biosensing Alert System by Water Science Division](4) Team Award (Internal Service) – Bronze Prize [Inline Hydroelectric Generating System in Confined Condition by Project Development Unit](5) Team Award (Internal Service) – Special Citation (Innovation) [Wave-powered Cleaning System by Energy Management Unit]

The adjudication panel complimented our Gold Prize’s awardee for developing a simple and creative Wave Power Cleaning System which enhanced the efficiency of pumping stations and saved the manpower in cleaning the intake screens. The panel especially appreciated the teamwork and dedication showcased throughout the project, which should be a good role model for other fellows.

The prize presentation ceremony was held on 6 September 2013.

This year, WSD won five awards in the Scheme. They are:(1) Departmental Service Enhancement Award (Large Department) - Bronze Prize (2) Team Award (Internal Service) – Gold Prize [Wave-powered Cleaning System by Energy Management Unit]

Since 1999, the Civil Service Bureau has been organising the Civil Service Outstanding Service Award Scheme on a biennial basis. The objectives of the Scheme are to recognise the efforts of departments and teams which provide excellent service, to promote a customer-focused culture in the civil service, and to inspire departments and teams for continuous improvement in the delivery of public services.

1

2

34

5

Adjudicators commented that the WSD showed a strong commitment in excellence with a solid foundation in science. The innovative Biosensing Alert System developed by the WSD has successfully safeguarded the quality of water supply and public health. Apart from striving for improvement in water quality, water supply stability and water efficiency, WSD proactively promoted educational activities on water conservation to encourage public participation in water saving.

WaterlinkS E P T E M B E R 2 0 1 3 I S S U E 66

Published by Water Supplies Department

NEWS ON CUSTOMER LIAISON GROUP (CLG)

ContentsNEWS ON CUSTOMER LIAISON GROUPSixty-sixth Meeting

FOCUSWSD wins 5 awards inthe Civil Service Outstanding Service Award Scheme 2013

UPDATESWave-powered Cleaning System

INTERFLOW VISITSDelegations

66th Meeting

Waterlink • September 2013 • Issue 66UPDATES

Wave-powered Cleaning SystemThere are about twenty seafront seawater pumping stations supplying seawater to Hong Kong residents for flushing purposes. At the suction intake of these seawater pumping stations, screens are installed to remove debris from seawater to avoid blockage and damage to the pumping system. However, the marine organisms grow on the intake screens at an astonishing speed and cause blockage of screens. This will result in lower efficiency of pumping stations and higher energy consumption. As such, the frontline staff has to clean and remove the marine growth from the intake screens frequently by using high-pressure water jets. It indeed consumes considerable amount of time and resources.

Water Supplies Department (WSD) has developed a Wave-powered Cleaning System to prevent marine organisms from growing on the intake screens. This system basically consists of a floating device connected with a wired brush. The design aptly employs the power of waves and tidal action to drive the wired brush so that it can scrub up and down of the intake screens 24 hours a day. The brushing action is to deter marine organisms from attaching themselves on the intake screens. An analogy example is that grass does not grow on areas where people keep on treading on them.

Due to the different surrounding environment of the seawater pumping stations, the designs and sizes of their suction intakes also vary. Therefore, three different intake screen cleaning systems (i.e. floating-panel, floating-ball and pulley type) are

designed to suit the various suction intakes.

Wave-powered Cleaning System is driven by renewable energy (i.e. waves and tides). It does not require chemicals or consume power. This design is environmentally friendly, simple, low-cost and effective. The use of the automatic round-the-clock cleaning system not only reduces the cleaning time and resources, but also helps enhance the efficiency of pumping station and save energy. At present, there are four seawater pumping stations installed with this device and later on it will be extended to other seawater pumping stations.

• Shells grown on an intake screen

• Intake screen cleaned by high-pressure water jet

• Demonstration of the operation of wave-powered cleaning device in the sea

• 3 different types of Wave-powered Cleaning Device: Floating Panel (left), Floating Ball (middle), Pulley Type (right)

DelegationsDuring the past several months, the following delegations visited the department to exchange experience and knowledge on the latest water treatment technologies and water supply management:

INTERFLOW VISITS

Delegation Date of Visit Location

Delegation from Shenyang 4-6-2013 WSD HeadquartersWater Resources Education Centre

Institut Teknologi Bandung, Indonesia 14-6-2013 Plover Cove Reservoir

Tai Tam Tuk Eco Education Centre 6-7-2013 Tai Tam Tuk Raw Water Pumping Station

Shenzhen Water (Group) Co., Ltd. 8-7-2013 WSD Headquarters

Rizhao International Ocean City, Shan Dong 11-7-2013 Tuen Mun Salt Water Pumping Station

The Development Research Center of Guangxi Region Municipal People’s Government 19-7-2013 WSD Headquarters

Pearl River Water Resources Commission from Guangzhou 25-7-2013 Ma On Shan Water Treatment Works

Hong Kong Institute of Educational Research,The Chinese University of Hong Kong 31-7-2013 Tai Tam Tuk Raw Water Pumping Station

The Chartered Institution of Water and Environmental Management 24-8-2013 Tuen Mun Water Treatment Works

Metropolitan Waterworks Authority of Bangkok Thailand 29-8-2013 R&R work site at Siu Lang Shui, Tuen Mun

(9/WSD/10)

Shenzhen Dongshen Water Resources Protection Office 6-9-2013 Plover Cove ReservoirHigh Island Reservoir

The NPC Standing Committee, Guangzhou Province 9-9-2013 WSD Headquarters

Electrical and Mechanical Services Department 10-9-2013 Lung Cheung Road Mechanical & Electrical WorkshopTai Wan Salt Water Pumping Station

Singapore Polytechnic 18-9-2013 Shat Tin Water Treatment Works

ENQUIRIES

24-hour telephone enquiry hotline: 2824 5000

Fax hotlines: 2519 3864 (for water supply and general matters) 2802 7333 (for billing and consumership matters)

Website address: http://www.wsd.gov.hk

E-mail address: [email protected]

Correspondence address:Water Supplies Department, Immigration Tower, 7 Gloucester Road, Wan Chai, Hong Kong (Fax: 2824 0578)

Editor:Public Relations Manager / Public Relations Unit, Water Supplies Department

Free copies of Waterlink can be obtained from the following locations:

• CustomerEnquiryCentresofthe Water Supplies Department

• PublicEnquiryServicesCentresofDistrictOffices/ Home Affairs Department

All WSD publications can be browsed on the WSD website.