Construction of Pantai 2 Sewage Treatment Plant,

Federal Territory of Kuala Lumpur (Design & Build)

Presented by :

Ahmad Rozian Othman

Jabatan Perkhidmatan Pembetungan

22 April 2015

THE PANTAI 2 EXPERIENCE :

Underground construction & Green Tech

Applications

Project Tittle Construction of Pantai 2 Sewage Treatment Plant, Federal

Territory of Kuala Lumpur (Design & Build)

Owner Kementerian Tenaga, Teknologi Hijau & Air (KeTTHA)

Implementing Agency Jabatan Perkhidmatan Pembetungan (JPP)

Project Management Consultant Kumpulan Ikhtisas Projek (M) Sdn. Bhd. – MECIP (M) Sdn. Bhd. JV

Design & Build ContractorBEWG (M) Sdn Bhd

(Contract novated from Beijing Enterprises Water Group Ltd)

Design Capacity 1,423,000 PE (320 MLD or 70.4 MGD)

Treatment SystemAdvanced A2O Biological Treatment System (Liquid Stream) +

Mesophilic Anaerobic Digester (Solid Stream)

Contract Cost RM 983,246,360.00

Date of Letter of Acceptance 4th July 2011

Date of Site Possession 28th July 2011

Overall Construction Period 6 years

Construction Period (Liquid Stream) 4 years

Operation & Maintenance 2 years (after construction completed)

Contract End Date 27th July 2017

PROJECT BACKGROUND

WORK PROGRAMME2018

STP Construction & Installation (Underground Structures)

STP Construction & Installation (Above Ground Structures)

Construction of the Facilities

O&M and DLP of the STP

Defects Maintenance & DLP of the Facilities

• CSC = Certificate of Sectional Completion• CPC = Certificate of Practical Completion• DLP = Defect Liability Period• STP = Sewage Treatment Plant• O&M = Operation & Maintenance• DLP = Defects Liability Period

2011 2012 2013 2014 2015 2016 2017

27/1/2016 (CSC 2)

27/1/2016

27/7/2017 (CPC)

28/7/2011

28/7/2015

28/1/2016

27/7/2015 (CSC 1)

27/1/2016 (CSC 3)

27/1/2018 (DLP2)

We are here (90% completion)3

Design & Construction Period

JINJANG

KEPONG

BUNUS

DAMANSARA

LOWER KERAYONG

Pantai 1 STP (377,000 PE)

Pantai 2 STP (1.423 Mil PE)

Pantai 2 STP

PROJECT BACKGROUNDCatchment Area

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DESA

BAIDURI

Pantai 1 STP (377,000 PE)

Pantai 2 STP (1.423 Mil PE)

PPR PANTAI RIA

PPR SRI CHEMPAKA

PPR SRI PANTAI

PROJECT BACKGROUNDExisting Site Condition

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THE P2STPSewage Treatment Plant (STP) Cross Section

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Facilities:

• Football field (1)

• Futsal courts (4)

• Basketball court (1)

• Sepak takraw (1)

• Volleyball (1)

• Tennis courts (2)

• Jogging track

• Children park

• Community Center

(400 pax)

GREEN TECHNOLOGYComponents

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Biogas

Effluent Reuse Biosolids Reuse

Wastewater Source Heat Pump

Aquatic Skylight + Skylight

Solar PV

Turbo Blowers

Rainwater

Harvesting

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FOOT PRINT OF UNDERGROUND

PANTAI 2 STP

• Capacity – 1.42 million PE• Underground Excavation

- 185m wide X 270m long- 12 to 15m below ground

P2STP CHALLENGESDesign Aspect – Geotechnical Design for

Deep Excavation

Excavation Edge

Electrified Double Track Railway Line

Apartment Blocks

Klang River

A

A

Site Constraints

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CONSTRUCTION PHOTOGRAPHS FOR CBP

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CONSTRUCTION FOR GROUND ANCHOR

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P2STP CHALLENGESConstruction Activities

Challenges Solution

Unfavorable feedback from

surrounding residents at early

stage

• Received lots of complaints

due to site construction

activities

• Environmental issues i.e.

odour, dust & noise

• Executed communication plan

strategy by carrying out

frequent engagement with

residents

• In environmental aspect,

minimizing the impact by

carrying out continuous

monitoring & fast response for

every complaint

Continuous incoming sewage flow

to the Site

• To decommission 4 out of 6

ponds in order to give way for

construction activities

(underground excavation)

• Providing Temporary Treatment

Facilities (TTF) in the

remaining 2 ponds with

extensive treatment involving

additional surface aerators &

submerged biomedia to cope with

incoming sewage flow

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P2STP CHALLENGESConstruction Activities

Challenges Solution

Sludge removal

• Huge quantity and difficulty

in off-site disposal as

landfill has limited capacity

• Some of the dried sludge sent

to fertilizer factory to

produce fertilizer

• Used Geotube technology to

desludge and now the dewatered

sludge (biosolids) is reused as

planting soil for the landscape

area.

• Late approval on wayleave from

KTMB to allow for ground

anchor to be installed

underneath KTMB reserve

• Took more than 6 months but

Contractor manage to recover by

increasing the production rate.

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P2STP CHALLENGESConstruction Activities

Challenges Solution

Insufficient semi & fully skilled

workers for jet grouting works &

carpentry works

The Contractor brought in skilled

workers from P.R China

Water shortage during water

rationing period

• Reuse of filtered rainwater for

concrete mixing use hence less

dependence on SYABAS water

• Pre-storage of SYABAS water

when supply is available

High water table during

excavation works for the

underground structure

Carried out extensive pumping and

plugging of leakages points

Water seepage after erection of

underground structure during

equipment installation

Requires water pumping for the

areas in order for equipment

installation to be done and

plugging off the affected areas

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P2STP CHALLENGESDesign Activities

Challenges Solution

Different reference standards

while performing detailed design

i.e. Chinese Standard (GB)

compared with BS/MS (relevant

standards practiced in Malaysia)

• Took longer time to review,

recheck and acceptance of

proposed detailed design (in

multiple submissions)

The D&B Consultants have to do

parallel design to counter check

the proposed design to ensure all

engineering consideration are

complied to BS/MS including all

related drawings detailing.

Different working

culture/practice

• i.e. no preparation of civil

guidance drawings

Amendments / revisions on

structural drawings were carried

out for several times albeit they

involved several minor changes.

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16

JULY 2012

JULY 2013

SITE OVERVIEW

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SITE OVERVIEW

JULY 2014

APRIL 2015

PROPOSED P2STP LAYOUT With Above Ground Facilities

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For more information about the Project, please visit our website @

www.pantai2stp.com.my