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Toilet Waste Disinfection System Controls Virus Transmission
Architectural Services Department, Hong Kong SAR Government
Industry: Environmental Technology & Engineering
Client's Profile
Architectural Services Department (ASD) of the Hong Kong SAR Government is the works agent for Government facilities development. It is responsible for maintaining the overall standard of both in-house and outsourced projects in terms of design and construction through an effective quality assurance and performance management system. ASD also provides monitoring and advisory services, facilities development and upkeep for Government and government-aided projects.
Client's Needs
To prepare for the possible recurrence of the Severe Acute Respiratory Syndrome (SARS), the Government has approved the renovation of 9 public hospitals to enhance the infection control capacity. This mainly involved the modification of some existing patient wards in these hospitals into special isolated SARS wards equipped with enhanced infection control facilities. The whole renovation project was targeted for completion by October 2003.
HKPC Services/Solutions
As revealed by the SARS cases in Amoy Gardens, severe outbreaks could be caused by invisible virus transmission via the sewerage system. Through some defects of the sewerage system, aerosolized droplets of contaminated sewage helped spread the viruses to the surrounding environment.
Realizing the importance of disinfecting the toilet sewage to enhance infection control, HKPC immediately designed and developed an automatic Toilet Waste Disinfection System (TWDS). HKPC actively approached hospitals and the ASD to promote the concept. The ASD eventually commissioned HKPC to carry out a pilot study to assess the performance of the proposed TWDS in early August, 2003. The pilot study was carried out at the Princess Margaret Hospital.
Productivity Achievements
Due to the extremely tight timeframe of the hospital renovation project, HKPC needed to complete the pilot study within a short period of time to demonstrate that the proposed TWDS could effectively kill the bacteria in the sewage. Eventually, it took only 3 weeks to complete the study and the findings was presented to the ASD. In early September 2003, the ASD officially appointed HKPC to modify all the toilets in the SARS wards (i.e. 139 toilets) in 3 major hospitals, namely the Princess Margaret Hospital, Prince of Wales Hospital and Queen Elizabeth Hospital, and install the proposed TWDS. All work was completed by the end of October 2003.
With quick response and effective project management, HKPC was further commissioned by the ASD to install TWDS for another 63 toilets in the Phase II Hospital Renovation Project, targeted for completion by December 2003.
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