• Title/Summary/Keyword: Biofilter Biofiltration

Search Result 77, Processing Time 0.024 seconds

A Study on the Effects of Retardation with Pb in the Biofilter (생물여과층에 의한 납의 이동억제효과에 관한 연구)

  • 이문현;이재영;최상일
    • Journal of Korea Soil Environment Society
    • /
    • v.5 no.2
    • /
    • pp.99-105
    • /
    • 2000
  • The purpose of this study was to show the application of the Biofilter for treatment of the soil contaminated by lead and to investigates the effect of the biofilter on the retardation of lead with pilotplants that were simulated with different media and the number of bed. and to testify the inoculation by seeding microbes. The ratio of the degradation of soil contaminant was verified as CODcr/TOC in order to find a variation of the stabilization index in soil. The Biofiltration was one of biological processing methods for treatment. The contaminants were transported through the biofilter that was filled with the media. The surface of media formed biofilm which was surrounded by microbes and through its boundary, some materials were exchanged and migrated into the cell of microbes in an orderly manner. To investigate the effect of the Biofiltration, contaminated soil with lead nitrate of 1000mg/kg in dry was made artificially. The tests were simulated such as compost, Bioceramic and compost with bioceramic by 7:3 in weight. The bed consisted of three layers in order to find effect of the number of bed. Aspergillus niger was used as a biosorbent could probe the effect on the retardation of lead.

  • PDF

Biofiltration of Ammonia Gas from Composting Using Sawdust as Biofilter Media (퇴비화 암모니아 가스의 톱밥 바이오 필터 매체에 의한 생물학적 탈취)

  • Hong Ji Hyung;Park Keum Joo
    • Magazine of the Korean Society of Agricultural Engineers
    • /
    • v.45 no.2
    • /
    • pp.107-115
    • /
    • 2003
  • Dairy manure amended with crop and forest residues (moisture 69% wet basis, C/N 22) was composted in a 605 L pilot-scale vessel using continuous air flow (56 L/min) for 19 days. Three pilot-scale sawdust biofilters (moisture 63%, pH 5.0) were built to clean biological waste gas from the composting process. For each methods, two replicated experiments were monitored over a period of three weeks. The system was evaluated to determine the biofilter media depth that would be adequate for compost odour reduction. The compost air cleaning was measured based on ammonia gas concentration before and after passing through the biofilter. Ammonia gas removal efficiency over 3 weeks was 42, 75 and 87% at sawdust biofilter media depth levels of 202, 400 and 600 mm, respectively. Each sawdust biofilter was operated at a moisture content in the range of 60~62% (wb), a temperature from 15 to $25^{\circ}C$, an average pressure drop from 240 to 340 Pa and a detention time from 60 to 180 seconds during the biofiltration process.

Performance of a Biofilter for Odor Removal during Manure Composting

  • Park, K.J.;Hong, J.H.;Choi, M.H.
    • Agricultural and Biosystems Engineering
    • /
    • v.3 no.2
    • /
    • pp.59-64
    • /
    • 2002
  • Odor generated during composting of livestock manure is mainly due to ammonia emission. Biofiltration is a desirable method to control composting odor. This study was conducted to analyze the efficiency of using fresh compost as a biofilter. A mixture of cattle manure and recycled compost was composted in a bin equipped with a suction-type blower. The exhaust gas was filtered through the fresh compost. Residence time was controlled by the flow rate of exhaust gas and the depth of filtering materials. At the aeration rate of 30 L/min(experiment I), ammonia reduction rate varied from 100% to -15% for biofilter A(residence time 56.5 s) and almost 100% for biofilter B(residence time 113 s). At the aeration rate of 30 L/min, the cumulative ammonia reduction rate was 80.5% for biofilter A and 99.9% for biofilter B. At the aeration rate of 50 L/min(experiment II), the lowest reduction rate showed a negative value of -350% on the 8th and 9th day for biofilter A(residence time 33.9 5), and 50% on the loth day for biofilter B(residence time 67.8s). At the aeration rate of 50 L/min, the cumulative ammonia reduction rate was 82.5% fur biofilter A and 97.4% for biofilter B. Filtering efficiency was influenced by residence time. The moisture content(MC) and total nitrogen(T-N) of the filtering material were increased by absorbing moisture and ammonia included in the exhaust gas, while pH was decreased and total carbon(T-C) remained unchanged during the filtering operation.

  • PDF

Biofiltration Using Stabilizing Compost of Ammonia Gas from Composting Manure (축분 퇴비화 암모니아 가스의 안정화 퇴비에 의한 생물학적 탈취처리)

  • Hong, Ji Hyung
    • Magazine of the Korean Society of Agricultural Engineers
    • /
    • v.43 no.6
    • /
    • pp.143-153
    • /
    • 2001
  • Hog manure amended with sawdust (moisture 56~60% wet basis, C/N 19-21) was composted in pilot-scale vessels using continuous aeration(CA) and intermittent aeration(IA) for 3 and 4 weeks. In two subsequent runs of the same duration, composts resulting from each of the first runs were used as a biofilter on the exhaust gas from newly composting material. Conditions between each of these paired sets appeared to be similar. Ammonia was released from the biofilter material during the first week of stabilization while the compost produced ammonia after the first week of composting. In both cases substantial absorption, 61~96 %, of ammonia production from the composting raw material was achieved in the stabilizing material during the final weeks of operation and indicates the use of the stabilizing hog manure/sawdust compost as a biofilter can reduce ammonia emissions. Total $NH_3-N$ emissions during run 2 in IA was less than 2/3 of those in CA. Dry solids loss for the stabilized compost (6~8 weeks) was 19~46%.

  • PDF

Effect of Compost Turning Frequency on the Composting and Biofiltration (퇴비화 및 탈취처리에 퇴비 혼합 교반 빈도가 미치는 영향)

  • Hong Ji-Hyung;Park Keum-Joo
    • Journal of Animal Environmental Science
    • /
    • v.12 no.2
    • /
    • pp.85-94
    • /
    • 2006
  • The effects of turning frequency of in-vessel composting on ammonia emissions during composting of separated solids from swine slurry/sawdust mixtures and performance of biofiltration using the chicken manure compost were investigated. Separated solids from swine manure amended with sawdust was composted in a 226 L laboratory-scale in-vessel reactors under various turning frequency and continuous airflow (0.6 L/min.kg.dm) for three weeks. Three laboratory-scale manure compost biofilters were built to treat effluent gas from the composting of separated solid from swine manure amened with sawdust process. These experiments were continued over a period of three weeks. The composting of separated solid swine manure amended with sawdust and manure compost biofiltration system were evaluated to determine the turning frequency type that would be adequate for the rate of decomposition and compost odour reduction. The compost odour cleaning was measured based on ammonia gas concentration before and after passing through the manure compost biofilter. The average ammonia odor reduction in the manure compost biofilter was 96.9 % at R1 (no turning), 99.4 % at R2(once a day turning) and 89.0 % at R3(twice a day turning), respectively. The efficiency of ammonia reduction was mainly influenced by the turning frequency.

  • PDF

Principle and Application of Biofiltration (바이오필터 기술의 원리와 적용에 관한 고찰)

  • Namkoong, Wan;Park, Joon-Seok;Lee, Noh-Sup
    • Journal of the Korea Organic Resources Recycling Association
    • /
    • v.8 no.1
    • /
    • pp.60-68
    • /
    • 2000
  • Biofiltration is an environmentally-sound technology for elimination of VOCs and odorous compound from low-concentration, high-volume waste gas streams because of its simplicity and cost-effectiveness. It can be appled to the treatment of gases from publicly owned treatment works, composting facilities, landfill sites, and soil vapor extraction systems. The ability to design an effective biofilter system involves a combination of fundamental biofilter knowledge, practical experience, and bench- and pilot-scale testing. The objective of this paper was to review principle, design parameters, operational conditions, case studies, and economy of biofiltration through literature.

  • PDF

Removal Characteristics of H2S in the Biofilter Packed with Activated Carbon/Polyurethane Composite Media (활성탄/폴리우레탄 복합담체를 충전한 바이오필터에서 H2S의 제거특성)

  • Gam, Sang Gyu;Gang, Gyeong Ho;Im, Jin Gwan;Lee, Min Gyu
    • Journal of Environmental Science International
    • /
    • v.13 no.1
    • /
    • pp.47-53
    • /
    • 2004
  • A biofiltration system using activated carbon/polyurethane composite as solid support inoculated with Bacillus sp. was developed for treating a gaseous stream containing high concentrations of H$_2$S. The effects of operating condition such as the influent H$_2$S concentration and the empty bed contact time (EBCT) on the removal efficiency of H$_2$S were investigated. The biofilter showed the stable removal efficiencies of over 99 % under the EBCT range from 15 to 60 sec at the 300 ppmv of H$_2$S inlet concentration. When the inlet concentration of H$_2$S was increased, the removal efficiencies decreased, reaching 95 and 74%, at EBCTs of 10 and 7.5 sec, respectively. The maximum elimination capacity in the biofilter packed with activated carbon/polyurethane composite media was 157 g/m$^3$/hr.

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
    • /
    • v.4 no.1
    • /
    • pp.85-96
    • /
    • 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%.

  • PDF

Removal of Malodorous Gases Emitted from a Wastewater Pumping Stations by Biological Methods (생물학적 방법에 의한 하수 중계펌프장의 악취제거)

  • 류희욱
    • Microbiology and Biotechnology Letters
    • /
    • v.32 no.3
    • /
    • pp.265-270
    • /
    • 2004
  • To select a promising technologies for removal of odorous gases emitted from a wastewater pump station, four methods such as activated carbon (A/C) adsorption, chemical absorption (acid and alkali scrubber), and two biofilters (polyurethane (PU) and worm cast) were investigated. The average odor removal efficiencies in the PU biofilter and A/C column was over 98%, but in a worm cast biofilter and chemical absorption were below 60-80%. The removal efficiency of PU biofilter was very stable (about 98-99%) in the range of retention times of 4-36s, and a maximum elimination capacity was $1.6${\times}$10^{ 7}$ $OUm^{-3}$$h^{-1}$ Deodorization costs for an activated carbon adsorption and a biofiltration method were investigated. With increasing odor intensity, the operating cost of the A/C column increased linearly, but the operating cost of the biofilteration increased slightly. The capital cost in a biofilter is about two times higher than that in an A/C column, but the operating cost is very lower than that of in A/C column. In conclusion, the biofiltration was evaluated one of the most promising technologies to control odor in a wastewater pump station.