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논문 기본 정보

자료유형
학술저널
저자정보
장지훈 (전북대학교 환경공학과) 옥용호 (전북대학교 환경공학과) 양고수 (전북대학교)
저널정보
한국환경기술학회 한국환경기술학회지 한국환경기술학회지 제20권 제6호
발행연도
2019.1
수록면
418 - 424 (7page)

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A Rotary Kiln furnace with a 1-ton scale production capacity, which is about 50 batches based on 20 kg weight per 1 composting batch, was constructed to analyze odor (ammonia) generation characteristics and mitigation strategies. The amount of compost fed into the reactor was 450 ~ 500 kg/batch. Hot air at 200~100 was injected into the reactor at a 3~5 m3/hr airflow rates early composting fermentation conditions. The temperature and moisture content in the furnace were measured to adjust the temperature and flow rate of the blowing air to maintain the conditions. The temperature of the compost in the reactor began to rise one day after injecting hot air and reached a maximum temperature of 80 ℃ after 48 hours. It gradually dropped after about four days and reached 63 ℃. Then, the temperature was maintained at about 58 ℃ after eight days. The moisture content was maintained at 42.6 ~ 51.2 % during the fermentation period and the ammonia concentration rapidly increased to 700~100 ppm after hot air was injected. It decreased after reaching the highest temperature and an air temperature of 63 ℃, at which time the ammonia concentration was 200~50 ppm, which was 1/10 of the highest value. Ninety-eight percent or more of the odor (ammonia gas) was efficiently removed by using citric acid and 0.3 M potassium permanganate as the absorbing solution, which was higher than when an aqueous solution was used as the absorbing solution. The odor removal (ammonia gas) efficiency using 0.3 M citric acid absorbent was relatively high (> 98 %) and particulate ammonium citrate was formed as a byproduct, indicating the potential for recycling as fertilizer.

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