Construction of Two Anaerobic Digester Tanks


Project Information

Georgetown, Penang

Client / Owner

Kementerian Tenaga, Air dan Komunikasi, Jabatan Perkhidmatan Pembentungan


Sepakat Setia Perunding Sdn. Bhd.

Main Contractor

WWE Holdings Berhad / Cipta Wawasan Maju Engineering Sdn. Bhd.


Asia Baru Construction Sdn. Bhd.

Date of Commencement

1st January 2006

Date of Completion

30th August 2007

The Jelutong Sewerage Treatment Plant was to be constructed on 14.7 hectares of reclaimed land and will treat the entire raw waste from Georgetown, Penang with an ultimate PE of 1.2 million.

The Energy, Water and Communications Ministry had awarded the Contract to WWE Holdings Berhad. Asia Baru Construction was appointed as a civil sub-contractor to construct the two (2) anaerobic digester tanks (20.0m dia. x 16.0m height) by Cipta Wawasan Maju Engineering Sdn. Bhd (CWM), the process turnkey contractor appointed by WWE Holdings Bhd.

The Letter of Acceptance (LoA) was issued to Asia Baru by CWM on 26th October 2006. The possession of site was on 3rd January 2006. Between the receipt of LoA and actual possession at site on 3/1/2006, a lot of preparatory works and planning at head office were carried out. Among them were:

  1. Proposed location of Contractor’s temporary facilities.
  2. Project Quality Plan (PQP).
  3. Submission and approval of design mix (G40 concrete) using 50% OPC and 50% GGBS supplied by Buildcon Concrete Sdn. Bhd.
  4. Method statement for Jumpform metal system and proposed paneling for wall and dome roof of tank.
  5. Submission and approval of design calculation for Jumpform and shop drawings.
  6. Design calculation of temporary falseworks and timber truss system to soffit of curved dome roof.
  7. Method statement to construct the dome roof and soffit formwork retrieval.
  8. Method statement for watertightness test.
  9. The scope of work for this project comprised of the following major components:
  10. The Construction and completion of two (2) anaerobic digester tanks.
  11. Watertightness testing of the two (2) digester tanks and finishes like internal epoxy protective coating, external painting and handrailing along the edge of the tank roof.