Awarded 1 March 2025
This project will investigate the role of air pressure transients on the spread of micro-organisms in clinical and laboratory settings. Air pressure transients within the Sanitary Plumbing System (SPS) can agitate water in sink traps (U-bends), generating aerosols and droplets that contaminate adjacent air and surfaces. These transient, sharp rises in air pressure traveling at the speed of sound, are caused by system congestion, jetting drainpipes, impaired airflow near discharging appliances, and overfilled sewers. Managing these transients in hospital SPSs could reduce MDR pathogen spread and hospital-acquired infections. We will study how air pressure transients in hospital sanitary systems spread microorganisms in clinical settings. Laboratory work at Heriot-Watt University and fieldwork at a Scottish hospital will include collecting environmental samples from wash-hand basins and sinks. Experiments will simulate and measure the impact of air pressure transients on microbial contamination, contributing to guidance on improved sanitaryware and wastewater drainage systems. This project aims to extend understanding, quantify the phenomenon, and produce prevention guidance. There is an urgent need to mitigate risks from microorganisms thriving in sink traps, especially in clinical areas.
For more information, contact Professor Michael Gormley at: M.Gormley@hw.ac.uk