A study on the distribution of odor substances in the space with the air supply port at the bottom of the space

―Studies using ammonia and D-limonene―

Abstract

In this study, the diffusion behavior of odor substances was measured by semiconductor gas sensors using a 1 m3 chamber. An air supply port was provided at the lower part of the chamber, and the exhaust port was changed to two places. We investigated the diffusion behavior of odor substances due to the difference in the position of the exhaust port. D-Limonene, a citrus fragrance, and ammonia, which is designated as one of the 22 specified malodorous substances, and smell like night soil, were used as odor substances. In the chamber where the exhaust port was installed on the ceiling, ammonia could be actively exhausted, and D-limonene could spread in the space. It is optimal to actively exhaust odors and take countermeasures against odors by changing the atmosphere of the space due to the odor of the aromatics.