• Title/Summary/Keyword: 암모니아성 질소

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A Study on the Treatment of Ammonia-Nitrogen in the Septic Tank Effluent Using Biological Fluidized Bed (생물학적(生物學的) 유동층(流動層)을 이용(利用)한 정화조유출수(淨化槽流出水)의 암모니아성(性) 질소제거(窒素除去)에 관한 연구(研究))

  • Kim, Hwan Gi;Kwon, Moon Sun
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.6 no.2
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    • pp.35-44
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    • 1986
  • This paper is a basic study of the experimental results for the treatment of ammonia-nitrogen in the septic tank effluent. The substrates in this experiment are actual septic tank effluent and synthetic waste-water which is similar to septic tank effluent containing a considerable amount of nitrogenous component. Experiments were conducted for organic removal and nitrification using various recycle ratio and hydraulic retention time at each stage. The results obtained show that organic removal rate was above 80% in the 1st and 2nd stage, but as nitrification process was proceeded, above 90% of ammonia-nitrogen was removed in the 3rd and 4th stage. In these cases, the recycle ratio and HRT were found 30 and 7 hrs respectively. In the relation of $NH_4{^+}-N$ removal to $NO_3{^-}-N$ formation in the synthetic waste-water and septic tank effluent, when $1mg/{\ell}$ of $NH_4{^+}-N$ was removed, $NO_3{^-}-N$ formations were $0.95mg/{\ell}$ and $0.82mg/{\ell}$ respectively. And kinetics of nitrification using Biological Fluidized Bed was discussed also.

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Removal of Ammonia-N by Immobilized Nitrifier Consortium (고정화된 질화 세균군에 의한 암모니아성 질소 제거)

  • 서근학;김병진;조문철;조진구;김용하;김성구
    • KSBB Journal
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    • v.13 no.3
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    • pp.238-243
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    • 1998
  • Nitrifier consortium immobilized in Ca and Ba-alginate beads were packed into two bioreactors and the performances of bioreactors were evaluated for the removal of ammonia nitrogen from synthetic aquaculture water. The total ammonia nitrogen (TAN) concentration of the influent was continually kept about 2g TAN/㎥. At the HRT of 0.6hr, ammonia nitrogen removal rate of two bioreactors were about 52.6 and 51.0g TAN/$\textrm{m}^3$/day, respectively. At the respect of ammonia nitrogen removal, two bioreactor showed the similar abilities. The second trial with nitrifier consortium immobilized in Ca-alginate bead was carried out to evaluate the ammonia nitrogen removal rate for 35 days. The highest ammonia nitrogen removal rate was 82g TAN/$\textrm{m}^3$ when HRT was about 0.3hr.

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Optimization for Removal of Nitrogen Using Non-consumable Anode Electrodes (비소모성 Anode(산화전극)을 이용한 질소 제거 최적화)

  • Hyunsang, Kim;Younghee, Kim
    • Clean Technology
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    • v.28 no.4
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    • pp.309-315
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    • 2022
  • Research was conducted to derive the optimal operation conditions and the optimal cathode for using a DSA electrode as an anode to minimize electrode consumption during the removal of nitrogen from wastewater by the electro-chemical method. Of the various electrodes tested as cathodes, brass was determined to be the optimal electrode. It had the highest NO3-N removal rate and the lowest concentration of residual NH3-N, a by-product when Cl is present in the solution. Investigating the effect of current density found that when the initial concentration of NO3-N was 50 mg L-1, the optimal current density was 15 mA cm-2. In addition, current densities above 15 mA cm-2 did not significantly affect the NO3-N removal rate. The effect of electrolytes on removing NO3-N and minimizing NH3-N was investigated by using Na2SO4 and NaCl as electrolytes and varying the reaction times. When Na2SO4 and NaCl are mixed at a ratio of 1.0 g L-1 to 0.5 g L-1 and reacted for 90 min at a current density of 15 mA cm-2 and an initial NO3-N concentration of 50 mg L-1, the removal rate of NO3-N was about 48% and there was no residual NH3-N. On the other hand, when using only 1.5 g L-1 of NaCl as an electrolyte, the removal rate of NO3-N was the highest at about 55% and there was no residual NH3-N.

Performance of Rotating Biological Contactor under Various Hydraulic Residence Time on thle Removal of Total Ammonia Nitrogen and COD in a Simnulated Water Recirculating System (모의 순환여과식 실험장치에서 회전원판반응기 (RBC)에 의한 순환수처리)

  • SUH Kuen-Hack;KIM Byong-Jin;LIM Sung-Il;CHO Jin-Koo;KIM Yong-Ha;OH Chang-Sup
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.32 no.2
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    • pp.180-185
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    • 1999
  • Rotating Biological Contactor (RBC) was tested for the treatment of artificial rearing water in n simulated aquaculture system. Performance of RBC on the removal of TAN and COD was evaluated by controlling hydraulic residence time (HRT). As HRT of RBC was increased, TAN removal rate ana removal efficiency of RBC and TAN concentration of rearing water were increased, but COD removal rate was decreased. Total alkalinity consumption rate was increased by increasing HRT of RBC. Ratio between total alkalinity consumption rate and TAN removal rate was 7.73. HRT for maintaining lowest TAN and COD concentration of artificial rearing water was 14,6 minutes and at that condition TAN and COD concentration of the water was 1.28 and $5.59 g/m^3$, respectively.

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Introduction of Kjeldahl Digestion Method for Nitrogen Stable Isotope Analysis (δ15N-NO3 and δ15NNH4) and Case Study for Tracing Nitrogen Source (Kjeldahl 증류법을 활용한 질산성-질소 및 암모니아성-질소 안정동위원소비 분석 및 질소오염원 추적 사례 연구)

  • Kim, Min-Seob;Park, Tae-Jin;Yoon, Suk-Hee;Lim, Bo-La;Shin, Kyung-Hoon;Kwon, Oh-Sang;Lee, Won-Seok
    • Korean Journal of Ecology and Environment
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    • v.48 no.3
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    • pp.147-152
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    • 2015
  • Nitrogen (N) loading from domestic, agricultural and industrial sources can lead to excessive growth of macrophytes or phytoplankton in aquatic environment. Many studies have used nitrogen stable isotope ratios to identify anthropogenic nitrogen in aquatic systems as a useful method for studying nitrogen cycle. In this study to evaluate the precision and accuracy of Kjeldahl processes, two reference materials (IAEA-NO-3, N-1) were analyzed repeatedly. Measured the ${\delta}^{15}N-NO_3$ and ${\delta}^{15}N-NH_4$ values of IAEA-NO-3 and IAEA-N-1 were $4.7{\pm}0.2$‰ and $0.4{\pm}0.3$‰, respectively, which are within recommended values of analytical uncertainties. Also, we investigated spatial patterns of ${\delta}^{15}N-NO_3$ and ${\delta}^{15}N-NH_4$ in effluent plumes from a waste water treatment plant in Han River, Korea. ${\delta}^{15}N-NO_3$ and ${\delta}^{15}N-NH_4$ values are enriched at downstream areas of water treatment plant suggesting that dissolved nitrogen in effluent plumes should be one of the main N sources in those areas. The current study clarifies the reliability of Kjeldahl analytical method and the usefulness of stable isotopic techniques to trace the contamination source of dissolved nitrogen such as nitrate and ammonia.

Relationship Between Soil Properties and Tip Burn of Chinese Chive Cultivated in Plastic Film House (시설재배 부추 잎끝마름증 발생에 영향을 미치는 토양특성)

  • Seo, Young-Jin;Choi, Young-Seub;Park, Jun-Hong;Kweon, Tae-Young;Choi, Seong-Yong;Kim, Chan-Yong;Kim, Jong-Su;Park, So-Deuk;Park, Man;Jeon, Sang-Ho;Jang, Yong-Sun;Ha, Sang-Keun
    • Korean Journal of Soil Science and Fertilizer
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    • v.44 no.3
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    • pp.380-386
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    • 2011
  • Tip burn has been reported as one of the most serious physiological disorder in Chinese chives (Allium tuberosum Rottl.) cultivated in plastic film house. In this study, a physiography and chemical properties of 132 plastic film house soils were investigated to elucidate factors affecting tip burn symptom. Also influence of soil properties on tip burn was statistically determined by path analysis and association analysis including a chi-square test or logistics analysis. Probability distribution of inorganic aqueous species, such as ammonia (g) was calculated using MINTEQ program. Soil order and chemical properties, especially pH, exchangeable calcium and inorganic nitrogen, showed a significant relationship with tip burn of Chinese chives. Tip burn symptoms occur mainly in an alkaline soil classified as Alfisols. Result of linear regression and path analysis exhibited that formation of ammonia (g) from soil solution depend upon soil pH and were associated with ammonium resulting from soil organic matter or nitrate. These results indicate that tip burn symptom of Chinese chives is directly affected by ammonia gas originated from alkaline soil condition.

Study on the Morphological Change and Reduction Plan of Nitrogen and Phosphorous in Litter and Manure of Cow House (우사의 깔짚과 퇴비에 있는 질소와 인의 형태적 변화와 저감 방안에 관한 연구)

  • Kim, Younjung;Ryoo, Keon Sang
    • Journal of the Korean Chemical Society
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    • v.65 no.4
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    • pp.249-253
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    • 2021
  • Litter and manure were obtained at a cow house of a livestock farm in Andondg city. We examined the change of formation of nitrogen and phosphorous from these samples and tried to suggest a more useful and realistic way for removing them. Constituent and its content of sample were identified by XRF. NO2-, NO3-, and PO43- ions and NH4+, T-P and T-N released from sample were analyzed using ion chromatograph and UV/Vis spectrometry, respectively. As the results of this study, the ammonia nitrogen in the early stage of cow excretion is a need to make an ammonia gas state that can be immediately volatile by increasing the pH. Nitrogen and phosphorous, the main source of nutrition in green algal bloom can be removed by transforming insoluble salts such as calcium phosphate (CaHPO4·3H2O) and struvite (NH4MgPO4·6H2O), respectively, with addition of Ca and Mg after stimulating fermentation of manure.