국내외 가축분뇨 퇴액비 이용 분야 암모니아 배출량 인벤토리 비교 연구

In Korea, more than 70% of the ammonia (NH3) released into the atmosphere is known to originate from livestock manure. The total emission (kg year-1) is calculated by multiplying the emission factor (kg head-1 yr-1) and the activity data (head). To improve the accuracy and reliability of the NH3 emission estimation process, an accurate account of livestock manure production, calculation of NH3 conversion and generation during the composting and liquefaction of manure, estimation of NH3 generation in the storage and transportation of manure and compost, and a comparative study of NH3 emission during the soil spreading process must be performed. Compared to the US and EU-28, in particular, the domestic emission factor is relatively even and the spatial/ temporal scale is not broken down sufficiently to reflect the domestic situation. As a way to improve the accuracy and expertise of estimating NH3 emission factors, a ‘dynamic chamber-capture system’ can be utilized, which allows complex considerations of compost, liquid manure, soil, and climate characteristics. By reviewing and comparing the data related to domestic and foreign NH3 emission, we identified shortcomings in the current domestic system and the directions to be taken and suggested a chamber system that could estimate NH3 emission flux. It is also necessary to establish a methodology for mesocosm systems in the field, in addition to indoor chamber systems, to be linked with practical policies, such as the calculation of new emission factors for missing sources.