PURPOSE: Air pollution and COVID-19 problems are being increasingly scrutinized . This article discusses the optimum design of an indoor and semi-outdoor air purifier, using a water-based filtration system .
METHODS: An air purifier was fabricated, then comparison of purifying efficacy of the system between untreated air and using an air pump was done . Incense smoke was generated within a room for 10 seconds . The number of particle sizes of PM0.3, PM0.5, PM1.0, PM3.0, PM5.0, and PM10 µm (particle/ m3) as well as the detection of mass concentration of PM1.0, PM2.5, PM5.0, and PM10 (mg/m3) at 0 and 5â¯min were recorded . Each experiment was repeated 10 times .
RESULTS: Particles in untreated air, except PM10, showed the maximum increase rate of the number of particle sizes greater than the air pump experiment . The highest differentiation between two methods was that PM1.0 and PM0.5 of untreated air increased to 113.647 and 61.539% whereas the air pump method showed 4.720 and 2.533%, respectively . The PM mass concentration of untreated air increased from 50.217 to 51.167% while the increased rate of PM using an air pump was 2.784 to 2.902% .
CONCLUSION: This study proposed a water-based air filtration technique, which can reduce the level of particulate matter, and also is a low-cost prototype . For the next experiment, the study should extend test length, clarify an optimum ratio of disinfectant technologies, connect with the internet of things, compare the efficiency with a HEPA filter air purifier, and then also measure some particles which are smaller than 0.2â¯µm.