Upgrading works scheduled on Stonecutters Island Sewage

A $2,386 million contract has been awarded for for upgrading the Stonecutters Island Sewage Treatment Works.

It includes the construction of a main pumping station, sedimentation tanks and ancillary facilities.

Speaking after the contract signing ceremony, the Director of Drainage Services, Mr Chan Chi-chiu, said this is the ninth works contract awarded for the Harbour Area Treatment Scheme Stage 2A and good progress has been made on those contracts already commenced. 

"The SCISTW is the centrepiece of HATS.  It provides chemically enhanced primary treatment and disinfection to all sewage collected via the deep sewage tunnels.  This contract comprises the construction of a large underground pumping station with an internal diameter of 55 metres and a depth of more than 40 metres, the provision of additional double-tray sedimentation tanks, a new computer control system, the expansion and modification of existing installations of the SCISTW as well as the construction of other ancillary facilities," Mr Chan said.

Upon completion of the upgrading works, the treatment capacity of SCISTW will be increased from 1.7 million cubic metres/day to 2.45 million cubic metres/day. The upgraded plant will also be provided with new deodorisation units for odour control and landscape works for aesthetic enhancement of the plant.

The contract is scheduled for completion in mid 2016.