지렁이 분변토와 주정슬러지 혼합 배양액을 이용한 Biofilter에서의 고농도 악취제거
Removal of High Odor Concentration with Biofilter using Mixture of Earthworm Cast and Distillery Sludge
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초록
Objectives: This study was conducted to investigate the removal of high odor concentration from swinewastewater treatment facility by full scale biofilter using liquid with deodorant mixed with earthworm cast anddistillery sludge. Methods: The supply of the culture liquid to the microorganism on the media in the biofilter increases theactivity and growth of biomass. The experimental equipment was biofilter tower with treatment capacity of90 m 3/min. The experimental conditions included gas flow of 60 m3/min, retention time of 20 sec, and gas/liquid ratio of 67. Results: With changing season from winter to summer, the inlet odor concentration of ammonia increased from2.5 ppm to 29 ppm, and of hydrogen sulfide from 21 ppm to 91 ppm, respectively. The odor treatment systemwith biofilter using the culture liquid was stable when the high loading rate increased and showed excellentremoval grade with an average of 96.7% for ammonia, and an average of 93.7% for hydrogen sulfide. The pHand SCOD in the recirculating culture liquid near the bottom of the biofilter tower decreased with operation time,but its influence on the odor removal rate was negligible, because the organic matter (SCOD) was replaced bysome culture liquid supplied 2-4 times per day. Conclusions: The biofilter using culture liquid could successfully remove high odor concentration which wasgenerated from swine wastewater treatment facility.
Abstract
Objectives: This study was conducted to investigate the removal of high odor concentration from swinewastewater treatment facility by full scale biofilter using liquid with deodorant mixed with earthworm cast anddistillery sludge. Methods: The supply of the culture liquid to the microorganism on the media in the biofilter increases theactivity and growth of biomass. The experimental equipment was biofilter tower with treatment capacity of90 m 3/min. The experimental conditions included gas flow of 60 m3/min, retention time of 20 sec, and gas/liquid ratio of 67. Results: With changing season from winter to summer, the inlet odor concentration of ammonia increased from2.5 ppm to 29 ppm, and of hydrogen sulfide from 21 ppm to 91 ppm, respectively. The odor treatment systemwith biofilter using the culture liquid was stable when the high loading rate increased and showed excellentremoval grade with an average of 96.7% for ammonia, and an average of 93.7% for hydrogen sulfide. The pHand SCOD in the recirculating culture liquid near the bottom of the biofilter tower decreased with operation time,but its influence on the odor removal rate was negligible, because the organic matter (SCOD) was replaced bysome culture liquid supplied 2-4 times per day. Conclusions: The biofilter using culture liquid could successfully remove high odor concentration which wasgenerated from swine wastewater treatment facility.
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