Derek Ong Boon Hong (FOS), Leonard Fang Wei Jie (FOS), Qiu Qishuo (FOS), Zhang Chenxiao (FOS), Zhang Xiangyu (FOS)
Academic Advisor: Dr. Chua Siew Chin
Water security is an essential issue in Singapore due to the energy-intensive desalination process, limited water resources and increasing demand. Given that rainwater is highly accessible in Singapore, our objective was to use rainwater as an alternative water source, specifically to mopping, thereby conserving and reducing consumption of potable water and energy in cleaning activities.
After identifying the most efficient location for rainwater harvesting, we designed and installed a rainwater harvester that filters, stores and dispenses rainwater. We executed a trial where cleaners would dispense the collected rainwater for mopping Block C’s ground floor. We interviewed the cleaners and OHS, and obtained positive responses. We found that the collected rainwater is of sufficient quality to ensure the cleanliness of the floor and conserves tap water simultaneously. Hence, we believe that using filtered rainwater is an effective and sustainable way for cleaning in the long run.