The invention servings, livestock manure, waste treatment facilities, such as odors resulting from the composting plant odor facilities relates to a deodorizing device for removing, to a gas ventilator using a closed fermentation tank fermentor without particular branch duct. An object of the present invention is in the livestock manure and manure pretreatment unit, the use of a closed fermentation tank without the branch duct in order to remove the odor generated therefrom by reducing the pressure loss, and so as to reduce the energy costs fermenter and installation gas ventilator to provide a. The present invention to achieve the above object, Consisting of a closed fermenter and drawings, A blower installed in the ventilation opening to either side of the fermentation tank and to absorb the gas and air, And external air intake for sucking outside air to the fermenter, The shutter consists of a number of different size is adjusted according to the outside air inlet section air volume, Is the outside air intake unit is made of double-inlet type, Consists of a ventilation opening for sucking external air and gas of each double inlet to the blower. Also as a preferred embodiment of the present invention, the double inlet are installed at a certain distance away in the fermenter Lower part and is characterized in that in the double-side suction port is installed. According to the invention, the branch duct reduces pressure loss without the use of a closed fermentation tank fermentor is to provide a gas ventilation device which can reduce energy costs and installation costs. In particular, by sealing the fermenter using a window frame consisting of a number of size to provide an effect that can be advertised in the installation structure is simple and low cost.본 발명은 인분, 축산 분뇨, 폐기물 처리시설, 퇴비화 공장 등 악취발생시설에서 발생하는 악취를 제거하는 탈취 장치에 관한 것이며, 특히 가지 덕트가 없이 밀폐된 발효조를 이용하는 발효조 가스 환기장치에 관한 것이다.본 발명의 목적은 분뇨 및 축산분뇨 전처리장치에 있어서, 이로부터 발생하는 악취를 제거하기 위해 가지 덕트가 없이 밀폐된 발효조를 사용함으로써 압력손실을 줄여 동
