부숙수피-펄라이트 혼합충전재의 돈사악취 제거 효과
Effect of Biofilter Made of Composted Pine Tree Bark and Perite on Reducing Odor from Pig House
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초록
국내에서 구입이 용이한 단일충전재(부숙수피, 펄라이트)와 혼합충전재(부숙수피와 펄라이트의 부피비 7:3)에 암모니아 산화균 Rhodococcus equi A3와 황 산화균 Alcaligenes sp. S5-5.2를 접종한 후, 양압식상향류식의 lab-scale 바이오필터에 각각의 충전재를 충전하여 암모니아 및 황화수소에 대한 악취가스 제거 성능을 평가 한 결과, 혼합충전재가 단일충전재에 비하여 악취제거 성능이 우수한 것으로 분석되었다. 또한 암모니아의 경우 180.0± 20.0 mg L-1 농도로 유입되는 상황에서 7.0±0.8 mg L-1로 배출되어 제거율이 96.1%이었으며, 그리고 황화수소의 경우 11.0±5.0 mg L-1 농도로 유입되는 상황에서 1.0±0.4 mg L-1로 배출되어 제거율이 91.1%이었다. 또한 이때의 미생물 생균수는 실험기간 동안 접종 초기 미생물 생균수와 거의 같게 유지되었다. 따라서 부숙수피와 펄라이트를 혼합하여 만든 혼합충전재의 악취제거 성능이 우수하고 가격이 저렴한 것을 고려해 볼 때, 혼합충전재가 기존의 다른 충전재보다 대규모 축산농가에서 현실적으로 이용하는데 유리할 것으로 판단된다.
Abstract
To remove effectively order components (NH3 and H2S) from pig house, biofilter was made of composted pine tree bark and perite and odor removal efficiency was evaluated in the lab and pilot scales. The columns were designed with 120 mm x 450 mm (H) and 850 mm x 900 mm (H) in the size in the lab and pilot scale testes, respectively. Single material of composted pine tree bark and perite and the mixture of two materials with 7:3 ratios (vol/vol) were packed in the column, and, herein, air flow was controlled upward direction from column bottom. To enhance the efficiency of biofilter, ammonia (Rhodococcus equi A3) and hydrogen sulfide oxidizing bacteria (Alcaligenes sp. S5-5.2) were inoculated in packing materials before the test. Removal effects of ammonia and hydrogen sulfide gases were higher in the mixture[88.7～98.2%, 89.5～97.9%] than that in single packing material (composted pine tree bark[89.4～98.7%, 78.7～85.6%] and perite[65.3～73.2%, 88.7～98.2%]) by the lab scale biofilter. In the modeled pig house, about 96 and 91% of ammonia and hydrogen sulfide gases were removed by the pilot scale of biofilter, respectively. Conclusively, composted pine tree bark and perite could be a good candidate of biofilter packing materials to remove the odor components.
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