Kuching Centralised Wastewater Management System Package 3
ELEVENTH MALAYSIA PLAN PROJECTS
Title :
Kuching Centralised Wastewater Management System Zone 1 Package 3
Project Background :
Package 1 of the Kuching Centralised Wastewater Management System has been completed on 31 January 2015. It covers the Central Business District of the City which is fully developed and densely populated. The works consists of 3 main components, namely:
| I. | Centralised Sewage Treatment Plant (CSTP) Module 1 (100,000 PE Capacity), |
| II. | Trunk, Secondary and Tertiary Sewer Network, and |
| III. | Property Connections to 67,000 PE |
Kuching Centralised Wastewater Management System Zone 1 Package 1
Package 2 of the project shall extend the coverage to Gita area and Padungan area. The works shall consists of 3 main components, namely:
| I. | CSTP Module 2 (100,000 PE Capacity), |
| II. | Trunk, Secondary and Tertiary Sewer Network, and |
| III. | Property Connections to 42,000 PE |
Kuching Centralised Wastewater Management System Zone 1 Package 2
Zone 1 Package 2 - Darul Hana project is implemented concurrently with Package 2. It shall sewer 5,000 PE from the Darul Hana new residential development area. The works comprises of secondary and tertiary sewer network and its connection to the existing module of STP which was commissioned under Package 1.
Kuching Centralised Wastewater Management System - Darul Hana
This Zone 1 Package 3 project shall extend the coverage to Sekama, City Kampung (Jalan Muhibbah, Jalan Datuk Ajibah Abol, Jalan Patingan), Sungai Maong Kanan and Kudei areas. The works shall consists of 2 main components, namely:
| I. | Secondary and Tertiary Sewer Network, and |
| II. | Property Connections to 70,683 PE |
Sewer Network:
The Sewer Network is designed based on gravity flow system. Trunk sewer for Kuching City South was completed under Package 1. The sewer network under this Package 3 shall comprises of only secondary and tertiary sewer.
The size of the secondary sewer ranges from 450 mm to 600 mm in diameter. The sewer is of reinforced concrete or HDPE material. The secondary sewer shall be mainly installed by trenchless method using Tunnel Boring Machines which can either be the Slurry or Augering Method. The tertiary sewer is generally of 225 mm to 300 mm in diameter. It shall be mainly installed using the conventional open-cut method, with only a small portion using the trenchless method.
The overall length of the Sewer Network under this Package 3 is approximately 49 km and it consists of:
| a. | Secondary Sewer | : | Approx. 6 km |
| b. | Tertiary Sewer | : | Approx. 43 km |
Property Connections:
Property Connections involves the re-routing of existing domestic plumbing for the collection of wastewater (i.e. greywater and blackwater) to public sewer networks. Wastewater from within the property boundaries (i.e. Houses, Shops, Institutions or Commercial Complexes) is collected and channelled via sewer within the property boundary to an Inspection Chamber outside the property boundary. From the Inspection Chamber it will then be connected to the nearest public sewer. A pumping system may be adopted for properties for those properties with limited space. In such cases, electric pumps will be installed in the existing septic tanks or package plants. Upon completion of the property connection works, the existing unused septic tanks or package plants will be disinfected and decommissioned.
The total number of properties to be connected under this Package 3 is about 13,000 units with an estimated 70,683 PE.
