Abstract
The purpose of this study is to examine the impact of storage conditions on garbage odor characteristics. Factors of storage conditions are temperature, quantity of water added to garbage and cut state of garbage. Temperatures were established at 10℃, 20℃, and 30℃, quantities of water were established at 0g, 10g, 20g, 30g and 70g, thicknesses of sample were established at 5cm, 1cm and cutting a shredded sample. The authors used a mixture of vegetables, fruit, fish and tea leaves, and measured the quantity and quality of odor emissions for 5 days. The authors put the mixed garbage in airtight glass containers and took 5l of odor gas into sampling bags by introducing outer clean air through a pump at 3l/min into the container. For the sampled odor, the authors measured odor concentration by the triangle bag test, concentration of sulfide compounds by gas chromatography and concentration of each of methylalcohol, acetic acid and ammonia by related detection tubes. In addition, the authors measured the sampled odor using both an odor sensor interlocking a semiconductor and a total hydrocarbon. The authors diluted the sampled odor with clean air to a value of 20 on the odor concentration scale. For the diluted sample, a group of 6 female students assessed the unpleasantness on a scale from 0 to 5. The results were as follows: 1) The quantity of odor emissions increases and the degree of unpleasantness is greater as the storage temperature, and quantity of water increase and the sample thickness decreases. 2) The change in storage temperature has the greatest effect in garbage odor emissions among the various storage conditions. 3) For the sensory evaluation of garbage odor, methyl mercaptan has the greatest effect in the quantity and the quality of odor emissions among odor constituents. 4) The odor sensor value is almost directly proportional to the logarithm of odor concentration for garbage odor, and so it is possible to monitor garbage odor fluctuation by the odor sensor.
