This study was carried out in order to help establish a continuous efficiency test method to evaluate the performance of chemical odorants. We designed a continuous efficiency test device, and conducted several experiments during 240 mins with D.W. and two chemical deodorants for several specified substances, and a complex odor compound. Based on the results, it was confirmed that the deocorant test only for ammonia and amine could yield no useful outcome because the solubility of the two compounds was very high. Henceforth, simultaneous tests for sulfides, mercaptans, aldehydes, and so on, shoud be conducted in order to ascertain the accurate deodorant performance results. It is also clear that the concentration of target compounds and reaction time are very important for the purposes of accurate deodorant tests. In addition, information about the absorption efficiency with regard to complex odor compound such as DMS+DMDS may be important and the results based on air dilution olfactory method should be provided. It is believed that this study can make a contribution to formulating the correct standards regarding the testing of deodorants and the application of such tests.

This study was conducted to find an efficient and economical mixing ratio of deodorant and a isolated microorganism to reduce ammonia in livestock manure compost. In this study, a simple experimental device that can compare the degree of odor reduction by connecting the vial containing the odor generating source and the gas detection tube and leaving it to stand was used. This test method cannot accurately measure ammonia concentration according to the characteristics of the detector tube, but it is an easy method to compare various experimental conditions. The microorganism isolated from pig manure, “Enterococcus casseliflavus” was found to have an effect on ammonia reduction. Surfactant (sodium dodecyl sulfate), mineral A, mineral B, sulfur, persimmon leaves, and glycerin used as a deodorant were mixed with E. casseliflavus NO-2-L to find the optimum mixing ratio. When 20% of deodorants and E. casseliflavus NO-2-L were added to the source of odor alone, the ammonia reduction efficiency of NO-2-L was the highest (66.7%) compared with other deodorants. When a mixture of microorganisms and deodorants were used, the ammonia reduction efficiency was the best when the mixing ratio of the deodorant was 20%. When mineral B and sulfur were added, the ammonia concentration reduction efficiency was the highest at 83.3%.

In this study, deodorizing efficiency of three deodorant products (1) A = ClO₂ Gel + charcoal, (2) B=Charcoal Gel, and (3) C = Gel (for Kimchi)) was investigated. For these experiments, a total of 15 odorants (4 reduced sulfur compounds, 2 volatile organic compounds, 7 carbonyl compounds, and 2 nitrogenous compounds) were investigated for a short term period. For the comparative analysis, 2 food types with strong odor properties (Kimchi and Fish) were selected and investigated. The analytical results were compared with respect to the blank sample (without deodorants) after normalization. Hence, if normalized concentration values are lower than unity one can assume that sample has positive deodorizing efficiency. The results of deodorant experiments indicate that the effects of the most common deodorant products are not effective enough to remove offensive odorants. However, the selection of deodorant products appears to be important, as they have very specific deodorizing efficiencies for certain compounds.