• Title/Summary/Keyword: 악취제거

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화산석을 담체로 충전한 Biofilter에서 양돈분뇨 중의 $H_2S$와 Styrene의 혼합가스 제거특성

  • Gang, Gyeong-Ho;Gam, Sang-Gyu;Lee, Min-Gyu
    • Proceedings of the Korean Environmental Sciences Society Conference
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    • 2006.11a
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    • pp.533-536
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    • 2006
  • 본 연구에서 biofilter를 이용하여 $H_2S$와 styrene의 혼합가스의 제거특성을 살펴본 결과, 먼저 biofilter의 담체로서 화산석이 충분히 활용될 수 있음을 보였고, 혼합가스의 수십 또는 수백배의 높은 농도에서 EBCT을 30 sec로 하여도 100%의 제거율을 보여 본 연구에 사용된 biofilter는 악취물질 제거에 효율적으로 적용될 수 있을 것으로 판단된다. 또한 혼합가스의 운전으로 pH는 저하되었지만 제거효율이 감소하는 현상은 발생하지 않았으며, 장기간의 운전에도 압력손실이 낮아 역세척이나 nutrient 공급을 조절할 필요가 없었다.

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The Effect of Yeast(Saccharomyces exiguus SJPAF1) on Odor Emission and Contaminants Reduction in Piggery Slurry (효모(Saccharomyces exiguus SJPAF1) 첨가에 따른 돈분뇨의 악취제거 및 오염물질 감소 효과)

  • Yoon, Deok-Hoon;Kang, Dong-Woo;Nam, Ki-Woong
    • Korean Journal of Environmental Agriculture
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    • v.28 no.1
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    • pp.47-52
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    • 2009
  • The aim of this study was to evaluate the effect of yeast(Saccharomyces exiguus SJPAF1, referred to as SA) addition on odor emission and contaminants reduction in piggery sluny. Four different rates of yeast addition were compared: no addition(SA0), 0.7L(SA0.7), 1.0L(SA1.0), and 1.5L(SA1.5) to one tone of piggery slurry. Odor emission tended to decrease with increasing the yeast application with concurrent effects of changes in temperature on outside of reactors. Particularly, reduction in ammonia emission was proportional to the yeast application rate; it reduced from 161.1 ppm in SA0 to 47.1 ppm in SA1.5 after 6 days of treatment Decomposition of piggery shiny by yeast increased to 13.8% more in SA1.5, and total amounts of piggery slurry decreased to 12.5% in SA1.5. Total coliforms were detected below 30MPN $ml^{-1}$ in SA1.5, while $8.3{\times}10^3$ MPN $ml^{-1}$ of Total coliforms were found in SA0. However, the effect of yeast addition in piggery slurry seemed to have no influence on the removal efficiency of contaminants such as BOD, COD, $NO_3^{-}-N$, $NH_4^{+}-N$, $PO_4^{-}P$. Consequently, the yeast(Saccharomyces exiguus SJPAF1) addition of 1.5% in the piggery sluny seems to have potential applicability for improving agent of pig-farm environment.

Odor Reduction of Pig Wastewater Using Magnesia (in-situ test) (마그네시아를 이용한 돈분 폐수의 악취 저감(현장 시험))

  • Bae, Su Ho;Ryoo, Keon Sang
    • Journal of the Korean Chemical Society
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    • v.66 no.3
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    • pp.202-208
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    • 2022
  • In this study, we tried to obtain the optimal conditions to reduce odors generated from pig wastewater using magnesia (MgO) through in-situ test after producing a reactor for removing odors. For this purpose, the filling amount of magnesia, the injection amount of pig wastewater, the aeration method, the aeration amount and the aeration time were considered. The field experiment was conducted at Cheongwoon Livestock Farm, which has a pig wastewater reservoir. As the amount of magnesia added to the weight of wastewater (500 kg) increases, the amount of ammonia (NH3) and hydrogen sulfide (H2S) generated tended to gradually decrease. As a result of the test, ammonia and hydrogen sulfide in the pig wastewater decreased up to 65% and 77%, respectively, for 2 days aeration after 0.8% of magnesia was added to the reaction tank. The initial pH of the pig wastewater in the reactor was 8.2, and the pH was found to be 9.2 when magnesia was added up to 0.8%. In the light of this trend, it can be known that magnesia gradually increases the pH in the pig wastewater and makes it weakly alkaline. As the pH increases, part of the ammonia gas present in the pig wastewater vaporizes into the air and the remaining part is removed by precipitation after chemical bonding with dissolved magnesium ions and phosphate ions. In order to remove the odor of pig wastewater and turn it into compost, most of the existing livestock farms go through a six-month aeration process using microorganisms. In contrast, the current study proved the effect of removing odors from pig wastewater within 2 days through chemical reactions that do not affect microbial activity.

A Study on the Odor Characteristics and Identification of Microbial in Biological Swine Manure Treatment Process by Bioreactor (생물반응기를 도입한 돈분뇨의 생물학적 처리공정에서 악취발생 특성 및 미생물동정에 관한 연구)

  • Ko, Joon-il;Park, Gui-hwan;Bae, Ju-soon;Oh, Gil-young;Chung, Seon-yong
    • Journal of Korean Society of Environmental Engineers
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    • v.37 no.9
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    • pp.526-532
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    • 2015
  • A bioreactor filling with pellets and stones was equipped to the swine manure treatment system, which is expected to emit high concentration of odor in the process of the organic wastewater treatment system, and in comparison with the activated sludge process as the control process, the reactor operation state, treatment water quality and odor emission concentration were measured. The reactor using the bioreactor proved to be much more stable in the bubble condition, treatment water transparency, etc, and BOD removal efficiency was also much better. The removal efficiency of T-N and T-P, however, showed little difference in the two reactors. Odor, as a result of examining $NH_3-N$, $NH_3$ concentratio, and complex odor, was 4 times to 24 times less emitted in the system using bioreactor than in the activated sludge system. $H_2S$, methyl mercaptan, dimethyl sulfide, and dimethyl disulfide were not found or were found in only 5 ppbs in each reactor and showed little difference between the two reactors. In the bioreactor process, Bacillus sp./ Pseudomonas sp. species were mainly found and in the activated sludge process, acterium sp. Chryseobacterium sp. species were mainly found.

Treatment of Food Garbage Using a Treatment Reactor and Microbial Consortium (발효소멸기를 이용한 음식물 쓰레기의 감량 및 악취제거)

  • Koh, Rae-Hyun;Lee, Kang-Hyoung;Yoo, Jin-Soo;Song, Hong-Gyu
    • Korean Journal of Microbiology
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    • v.42 no.4
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    • pp.306-312
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    • 2006
  • Disposal of food garbage in most large cities is very troublesome task. To date, microbiological treatment has been received an attention as a garbage decomposition process. In this study, the inoculation effect of some cellulase, amylase and protease-producing bacteria and photosynthetic bacteria on food garbage treatment was examined. They were added into a treatment reactor specially designed in this study together with food garbage and incubated in various conditions for 15 days and the removals of food garbage and foul smell produced during the treatment were analyzed. Average decomposition percentages of the inoculated food garbage in treatment reactor were 11 and 18.8% under intermittent aeration (once in a day) and continuous aeration conditions (2 L/min), respectively, and these were higher than removal percentages in the corresponding uninoculated reactors,3.4 and 13.8%. Optimal pH and temperature for food garbage decomposition by inoculated bacteria were pH 7.0 and $30^{\circ}C$. Maximal decomposition percentage in the inoculated food garbage was 35% under the optimal condition (pH 7, $30^{\circ}C$, and continuous aeration). The malodor compounds generated from food garbage treatment such as complex foul smell and sulfur compounds were effectively reduced about 84% and 25.5%, respectively, with a biofilter composed of purple nonsulfur bacteria trapped in sponge. This decomposing capability of food garbage by these bacteria can be utilized for the rapid and efficient treatment of food garbage.

Comparison of Liquid Composting Efficiency using Liquid Pig Manure in Different Condition (가축분뇨 슬러리 액비 부숙 조건별 특성비교)

  • Jung, Kwang-Yong;Cho, Nam-Jun;Jeong, Yee-Geun
    • Korean Journal of Environmental Agriculture
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    • v.17 no.4
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    • pp.301-305
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    • 1998
  • This study was conducted to evaluate the liquid composting efficiency using pig manure in different condition such as simple storage type reactor, continuous aeration reactor, anaerobic reactor and anaerobic agitation reactor. Continuous aeration reactor was the most efficiency method to BOD and malodors removal than other methods. While nitrogen loss in continuous aeration reactor was 47% of initial concentration, which was the higher amount than any other digestion methods. The digestion efficiency between anaerobic reactor and anaerobic agitation reactor were similar, but E. coli and malodor removal efficiency were a little higher in the anaerobic agitation reactor. Simple storage type reactor which was conventional digestion method in rural area gave lower efficiency than aerobic and anaerobic digestion methods in view of BOD, E. coli and malodor removal. The liquid composting efficiency which were evaluated by various indicators like pH, BOD, E, coli, malodor and nitrogen loss was high in the order of anaerobic agitation reactor>continuous aeration reactor>anaerobic reactor>simple storage type reactor.

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Biofiltration of Odorous Compounds in Municipal Solid Waste Landfill Gases (생물탈취상에 의한 도시폐기물 매립지가스내 악취물질의 처리)

  • 남궁완;박준석;황의영;이노섭;인병훈;김정대
    • Journal of Korea Soil Environment Society
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    • v.4 no.1
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    • pp.85-96
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    • 1999
  • Biofiltration is an attractive technique for elimination of VOCs and odorous compounds from low-concentration, high-volume waste gas streams because of its simplicity and cost-effectiveness. The objective of this study was to estimate the removal characteristics of Odorous Compounds including $H_2$S, $NH_3$End BTEX in MSW landfill gases. This Study was conducted at Nanjido landfill site. A compost from the Nanjido composting facility was used as a filling material for biofiltration. Extracted landfill gases were injected into biofilter reactors after mixing with air. Experiments were performed in an incubator being set to $20^{\circ}C$ $H_2$S concentrations were monitored at the depths of 25, 50, 75 and 100cm from the bottom Of the biofilter reactors. 98% of $H_2$S was removed at the filling depth of only 25cm. NH$_3$removal rate was about 85%. Toluene removal rate was the highest among BTEX. Significant pH drop of a filling material was not observed during the biofilter operation of 1 month. Without mixing the landfill gas stream with all, the removal rate of $H_2$S decreased down to 30%.

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