In this paper, the odor substance concentration and the odor sources were monitored and analyzed focusing on the 8 site types where civil complaints have been frequent and the main odor source that had an effect on the sites were surveyed.
The 8 site types are a fertilization site using organic resources, a coating treatment facility, a consigned waste and wastewater treatment facility, a paint and organic compound facility, a livestock (piggery) facility, a metal melting and heat treatment facility, a livestock feed and food processing facility, and a textile dyeing and artificial processing facility.
The 12 types of designated odor substances were monitored and analyzed by following the odor process testing method.
The main odor generated from the fertilization facility using the piggery night soil was from the 1st phase fermentation tank and the compound odor concentration was up to 300 to 4,481 times higher. The odor substances that had the highest effects were, in order, by trimethylamine (48%), methyl mercaptan (28%), ammonia (11%), isovaleraldehyde (9%), and hydrogen sulfide (4%).
Trimethylamine and methyl mercaptan, contributed mostly to the facilities using food disposal.
The main odor sources from the coating treatment facilities that use a lot of organic compounds were acetaldehyde and isovaleraldehyde, which were generated from the coating material leftovers and the coating/drying process.
From the consigned waste and wastewater facilities, trimethylamine, acetaldehyde, dimethylsulfide, butylaldehyde, and hydrogen sulfide were the main sources of odor.
From the paint and organic compound facilities, the VOCs generated from the resin melting process contributed to the expected odor concentration of the designated odor substances 7,261 times lower than the 20,800 times odor concentration that was actually monitored.
The compound odor in the livestock facility is on average 685 times of which hydrogen sulfide influences. The trimethylamine, methyl mercaptan, and acetaldehyde are the next in line to contribute to the odor source. Although it was not selected in this paper, Ansung piggery fermentation facility in Jeju province, unlike the other livestock farmhouses that are worried about the odor problems, used the microbiological substances that was self-developed to solve the odor problem and is one of the successful cases that is being operated with no civil complaints.
Hydrogen sulfide contributed the most in the metal melting and heat treatment facilities' odor problems and next in line were methyl mercaptan, acetaldehyde and trimethylamine.
The odor generated from the livestock feed and food processing facilities was caused by the ammonia and amine type nitrogenous compound hydrogen sulfide and methyl mercap type sulfur compounds generated from the organics degradation process.
The compound odor generated from the textile dyeing and processing facilities' final outlet was 2,080 times higher and the main odor sources from the 12 types of designated odor substances were aldehyde, hydrogen sulfide and trimethylamine. However, the expected compound odor was 666 times, which was 1/3 of the actual odor, suggesting that substances other than the 12 types of designated odor substances seem to have an influence.