본 연구에서는 반류수를 유입원수로 선정하여 미생물 고정화 담체에 의한 폐수고도처리 효율 개선 및 그에 따른 동역학적 인자 도출의 실험적 연구를 수행하였다. 미생물 고정화 담체 투입 반응조 성상 분석을 위해 COD, Nitrogen fraction 실험, OUR test를 실시하였고 그에 따른 동역학 ...
본 연구에서는 반류수를 유입원수로 선정하여 미생물 고정화 담체에 의한 폐수고도처리 효율 개선 및 그에 따른 동역학적 인자 도출의 실험적 연구를 수행하였다. 미생물 고정화 담체 투입 반응조 성상 분석을 위해 COD, Nitrogen fraction 실험, OUR test를 실시하였고 그에 따른 동역학 인자 분석을 통해 미생물 고정화 담체 적용 생물 반응조의 효율 개선 효과 등을 분석하였다. 미생물 고정화 담체를 적용한 반응조의 유입수의 성상분석을 통해 SS, SI, XI, SI의 성분을 미생물의 사용 속도에 따라 네 가지로 구분하였으며 각 64.4 mg/L, 27.83 mg/L, 9.46 mg/L, 115.7 mg/L의 농도 값을 나타내었고 이에 따른 분율은 각 29.62%, 12.8%, 4.36%, 53.22%이다. Nitrogen fraction 실험 결과 유입 원수를 SNH, SNO, SND, SNI, XND, XNI의 여섯 가지 성분으로 구분할 수 있었으며 각 70.34 mg/L, 0 mg/L, 4.23 mg/L, 2 mg/L, 7.59 mg/L, 6.51 mg/L의 농도 값을 나타내었고 이에 따른 분율은 각 77.6%, 0%, 4.67%, 2.21%, 8.38%, 7.18%이다. 미생물의 활성도를 측정하는 OUR test 결과 미생물 고정화 담체를 사용한 공법이 일반 하수처리장 미생물 슬러지의 활성슬러지 공법의 활성도 보다 높은 결과를 나타냈으며, 이는 미생물 고정화 담체를 적용한 공법의 높은 처리효율에 영향을 주는 요소로 판단된다. 미생물 고정화 담체 적용 반응조 내 동역학적 계수는 종속영양 미생물의 생산계수인 YH, 종속영양 미생물의 사멸계수 bH, 종속영양 미생물의 반포화상수 KS, 종속영양 미생물의 최대 비성장계수 μmax·H, 독립영양 미생물의 최대 비성장계수 μmax·A 등을 산정하였고 연속식 운전 반응조의 공법인 MLE공법을 이용하여 각 MODE 별 반응조 내 질산화, 탈질 효율을 나타내었다. 미생물 고정화 담체를 적용 시 암모니아성 질소 농도와 질산성 질소, 아질산성 질소 농도 등 질소계 물질의 농도는 감소되어 높은 질산화율과 탈질율을 나타내었다. 미생물 고정화 담체를 이용해 기존의 고도처리 공법에 비하여 질소의 처리에서 높은 효율을 나타내는 것을 확인할 수 있었으며 이를 통해 단순 효율 비교만이 아닌 설계인자의 표준화 및 최적화를 위하여 유사 공법과의 설계인자 비교를 수행하였다.
본 연구에서는 반류수를 유입원수로 선정하여 미생물 고정화 담체에 의한 폐수고도처리 효율 개선 및 그에 따른 동역학적 인자 도출의 실험적 연구를 수행하였다. 미생물 고정화 담체 투입 반응조 성상 분석을 위해 COD, Nitrogen fraction 실험, OUR test를 실시하였고 그에 따른 동역학 인자 분석을 통해 미생물 고정화 담체 적용 생물 반응조의 효율 개선 효과 등을 분석하였다. 미생물 고정화 담체를 적용한 반응조의 유입수의 성상분석을 통해 SS, SI, XI, SI의 성분을 미생물의 사용 속도에 따라 네 가지로 구분하였으며 각 64.4 mg/L, 27.83 mg/L, 9.46 mg/L, 115.7 mg/L의 농도 값을 나타내었고 이에 따른 분율은 각 29.62%, 12.8%, 4.36%, 53.22%이다. Nitrogen fraction 실험 결과 유입 원수를 SNH, SNO, SND, SNI, XND, XNI의 여섯 가지 성분으로 구분할 수 있었으며 각 70.34 mg/L, 0 mg/L, 4.23 mg/L, 2 mg/L, 7.59 mg/L, 6.51 mg/L의 농도 값을 나타내었고 이에 따른 분율은 각 77.6%, 0%, 4.67%, 2.21%, 8.38%, 7.18%이다. 미생물의 활성도를 측정하는 OUR test 결과 미생물 고정화 담체를 사용한 공법이 일반 하수처리장 미생물 슬러지의 활성슬러지 공법의 활성도 보다 높은 결과를 나타냈으며, 이는 미생물 고정화 담체를 적용한 공법의 높은 처리효율에 영향을 주는 요소로 판단된다. 미생물 고정화 담체 적용 반응조 내 동역학적 계수는 종속영양 미생물의 생산계수인 YH, 종속영양 미생물의 사멸계수 bH, 종속영양 미생물의 반포화상수 KS, 종속영양 미생물의 최대 비성장계수 μmax·H, 독립영양 미생물의 최대 비성장계수 μmax·A 등을 산정하였고 연속식 운전 반응조의 공법인 MLE공법을 이용하여 각 MODE 별 반응조 내 질산화, 탈질 효율을 나타내었다. 미생물 고정화 담체를 적용 시 암모니아성 질소 농도와 질산성 질소, 아질산성 질소 농도 등 질소계 물질의 농도는 감소되어 높은 질산화율과 탈질율을 나타내었다. 미생물 고정화 담체를 이용해 기존의 고도처리 공법에 비하여 질소의 처리에서 높은 효율을 나타내는 것을 확인할 수 있었으며 이를 통해 단순 효율 비교만이 아닌 설계인자의 표준화 및 최적화를 위하여 유사 공법과의 설계인자 비교를 수행하였다.
In this research, an experimental study was conducted to improve the efficiency of the return flow treatment process using microorganism immobilization media and to derive the kinetic parameters in this advanced wastewater treatment process. There are various advanced treatment processes, like modif...
In this research, an experimental study was conducted to improve the efficiency of the return flow treatment process using microorganism immobilization media and to derive the kinetic parameters in this advanced wastewater treatment process. There are various advanced treatment processes, like modified Bardenpho process, MLE process, and media application process, and the treatment process used in this study was MLE process using microorganism immobilization media. The experimental equipment used in this study consist of anoxic tank (denitrification tank) and aerobic tank (nitrification tank) for MLE process. In order to compare the respiration rate of microorganisms, the oxygen uptake rate in microorganism immobilization media process and existing activated sludge process was compared by OUR test. It was concluded that the microorganism immobilization media showed higher treatment efficiency than the existing activated sludge process. COD, Nitrogen fraction, and OUR test were performed to analyze the characteristics of the microorganism immobilization media process, and the efficiency of the microorganism immobilization media bioreactor was analyzed through analysis of biokinetic parameters. The components of SS, SI, XI, and SI were classified into four groups according to the microbial utilization rate, and the contents of each was 64.4 mg / L, 27.83 mg / L, 9.46 mg / L, 115.7 mg / L, and the fractions were 29.62%, 12.8%, 4.36% and 53.22%, respectively. In the nitrogen fraction experiment, the number of the influent was classified into six components of SNH, SNO, SND, SNI, XND and XNI. And the concentration of these components were 70.34 mg/L, 0 mg/L, 4.23 mg/L, 2 mg/L, 7.59 mg/L and 6.51 mg/L, respectively. The fractions were 77.6%, 0%, 4.67%, 2.21%, 8.38% and 7.18% respectively. Nitrification and denitrification efficiencies were analyzed according to the characteristics of T-N, NH4+-N, NO2--N, NO3--N, Alkalinity, and CODCr concentration and analysis of the influent, denitrification effluent and final effluent was conducted of each 20 L anoxic and aerobic reactor in MLE process. MODE 1 was operated with C / N ratio 4 and internal return flow rate 2Q up to the initial 5 days. MODE 2 was changed to C / N ratio 3 and internal return flow rate 2Q. Additional the external carbon source was injected to increase nitrification and denitrification efficiency. In MODE 3, the concentration of influent was increased with experimental data after 15 days. The removal efficiency of CODCr in the reactor was analyzed and to figure out the nitrification efficiency, T-N and ammonia concentration was determined. The removal efficiency of CODCr was 76.77%, T-N removal rate was 81.31% and NH4+-N was 98.23%. Nitrification efficiencies were confirmed that increased changing the operation condition, and also the denitrification efficiency was increased to 98.97% through NO3-—N concentration. The denitrification efficiency of nitrate and nitrite were also increased under changing operating conditions. The biokinetic parameters of the heterotrophic microorganisms and autotrophic microorganisms was calculated and the nitrification and denitrification efficiencies in each reactor were analyzed in MLE process. It was confirmed that the microorganism immobilization media showed higher efficiency in the treatment of nitrogen compared with the conventional treatment method. The YH value of the heterotrophic microorganisms was determined by the relationship between SCOD and BCOD with time, and the YH value was calculated to 0.6516 mg COD / mg COD. This indicates that the microorganism immobilization media is well grown at a value of more than 0.6. The bH of the heterotrophic microorganism was calculated as the slope value b'H through the change of the linearized lnOUR value, and the activity fraction at this time was 0.688 /d. This suggests that the microorganism immobilization media are not dead but the growth is good. The maximum specific growth coefficient of the heterotrophic microorganism μmax·H can be calculated as 9.632 mg COD / mg VSS·d, which is the maximum substrate utilization rate Kms value, which is calculated to be 6.267 /d. This confirms that the active biomass in the microorganism immobilization media is active. The half-saturation constant of the heterotrophic microorganism KS was determined to be 18.4 as the concentration of the substrate at the time when the microorganism reached 1/2 of the maximum specific growth rate. It was found that the affinity for the microbial substrate was high at a high value of 10 or more. The XA value was estimated to be 14.57 mg VSS / L and the rNn was calculated to be 53.906 mg N / L·d for the evaluation of the maximum specific growth coefficient of the autotrophic microorganism μmax·A. As a result, the maximum specific growth rate of the autotrophic microorganism was determined to be 0.3698 /d. As the operation mode of the MLE process of the continuous type reactor is appropriately changed, the maximum specific growth rate of the autotrophic microorganisms is gradually increased and also the effluent treatment efficiency will be increased.
In this research, an experimental study was conducted to improve the efficiency of the return flow treatment process using microorganism immobilization media and to derive the kinetic parameters in this advanced wastewater treatment process. There are various advanced treatment processes, like modified Bardenpho process, MLE process, and media application process, and the treatment process used in this study was MLE process using microorganism immobilization media. The experimental equipment used in this study consist of anoxic tank (denitrification tank) and aerobic tank (nitrification tank) for MLE process. In order to compare the respiration rate of microorganisms, the oxygen uptake rate in microorganism immobilization media process and existing activated sludge process was compared by OUR test. It was concluded that the microorganism immobilization media showed higher treatment efficiency than the existing activated sludge process. COD, Nitrogen fraction, and OUR test were performed to analyze the characteristics of the microorganism immobilization media process, and the efficiency of the microorganism immobilization media bioreactor was analyzed through analysis of biokinetic parameters. The components of SS, SI, XI, and SI were classified into four groups according to the microbial utilization rate, and the contents of each was 64.4 mg / L, 27.83 mg / L, 9.46 mg / L, 115.7 mg / L, and the fractions were 29.62%, 12.8%, 4.36% and 53.22%, respectively. In the nitrogen fraction experiment, the number of the influent was classified into six components of SNH, SNO, SND, SNI, XND and XNI. And the concentration of these components were 70.34 mg/L, 0 mg/L, 4.23 mg/L, 2 mg/L, 7.59 mg/L and 6.51 mg/L, respectively. The fractions were 77.6%, 0%, 4.67%, 2.21%, 8.38% and 7.18% respectively. Nitrification and denitrification efficiencies were analyzed according to the characteristics of T-N, NH4+-N, NO2--N, NO3--N, Alkalinity, and CODCr concentration and analysis of the influent, denitrification effluent and final effluent was conducted of each 20 L anoxic and aerobic reactor in MLE process. MODE 1 was operated with C / N ratio 4 and internal return flow rate 2Q up to the initial 5 days. MODE 2 was changed to C / N ratio 3 and internal return flow rate 2Q. Additional the external carbon source was injected to increase nitrification and denitrification efficiency. In MODE 3, the concentration of influent was increased with experimental data after 15 days. The removal efficiency of CODCr in the reactor was analyzed and to figure out the nitrification efficiency, T-N and ammonia concentration was determined. The removal efficiency of CODCr was 76.77%, T-N removal rate was 81.31% and NH4+-N was 98.23%. Nitrification efficiencies were confirmed that increased changing the operation condition, and also the denitrification efficiency was increased to 98.97% through NO3-—N concentration. The denitrification efficiency of nitrate and nitrite were also increased under changing operating conditions. The biokinetic parameters of the heterotrophic microorganisms and autotrophic microorganisms was calculated and the nitrification and denitrification efficiencies in each reactor were analyzed in MLE process. It was confirmed that the microorganism immobilization media showed higher efficiency in the treatment of nitrogen compared with the conventional treatment method. The YH value of the heterotrophic microorganisms was determined by the relationship between SCOD and BCOD with time, and the YH value was calculated to 0.6516 mg COD / mg COD. This indicates that the microorganism immobilization media is well grown at a value of more than 0.6. The bH of the heterotrophic microorganism was calculated as the slope value b'H through the change of the linearized lnOUR value, and the activity fraction at this time was 0.688 /d. This suggests that the microorganism immobilization media are not dead but the growth is good. The maximum specific growth coefficient of the heterotrophic microorganism μmax·H can be calculated as 9.632 mg COD / mg VSS·d, which is the maximum substrate utilization rate Kms value, which is calculated to be 6.267 /d. This confirms that the active biomass in the microorganism immobilization media is active. The half-saturation constant of the heterotrophic microorganism KS was determined to be 18.4 as the concentration of the substrate at the time when the microorganism reached 1/2 of the maximum specific growth rate. It was found that the affinity for the microbial substrate was high at a high value of 10 or more. The XA value was estimated to be 14.57 mg VSS / L and the rNn was calculated to be 53.906 mg N / L·d for the evaluation of the maximum specific growth coefficient of the autotrophic microorganism μmax·A. As a result, the maximum specific growth rate of the autotrophic microorganism was determined to be 0.3698 /d. As the operation mode of the MLE process of the continuous type reactor is appropriately changed, the maximum specific growth rate of the autotrophic microorganisms is gradually increased and also the effluent treatment efficiency will be increased.
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