혐기·호기공정을 이용한 생물막법에서 유기물, 질소 및 인제거에 관한 연구

이성기,송영일,김현중,진성기,김은영 조선대학교 환경연구소 2001 環境硏究 Vol.17 No.1

Anoxic and Oxic process with contact media is used to remove an organic matter, nitrogen and phosphorus in sewage which derives from domestic wastewater. Experiments have been done with various conditions that concentration of oxygen can be 3mg/ℓ, 4∼5mg/ℓ and 5∼6mg/ℓ by controlling an retention time can be 10hr, 12hr and 14hr, return rate can be 0%, 100% and 200%. As the concentration of oxygen is 2∼3mg/ℓ. The rate of removal of BOD. COD. SS. T-N and T-P is 87%, 76%, 82%, 34% and 24%. As the concentration of oxygen is 5∼6mg/ℓ. The rate of removal of BOD, COD, SS, T-N and T-P is 92%, 84%, 88%, 45% and 33%. In the rate of removal of an organism, nitrogen and phosphorus thus It well be known that the rate of removal an organic matter, nitrogen and phosphorus will be increased as the concentration of oxygen becomes higher. As th retention time is increased, the rate of removal of BOD, COD, SS, T-N and T-P is gradually higher in the rate of removal of an organic matter, nitrogen and phosphorus. Because contact time and contact area will be increased, which generates active substrate transfer and metabolic react according to increment of retention time. As the return rate is increased. The rate of removal of BOD, COD and SS is likely to be increased. In the case of T-N. It is also increased by 28% at 0% of the return rate and by 60% at 200% of the return rate. In the case of T-P, however, It is deceased, as the return rate is increased by 42% at 0% of the return rate and by 30% at 00% of the return. As the return rate is increased the retention time is decreased, which causes less activity of bacterial which affects that the rate of removal of Phosphorus is decreased.

혐기·호기공정을 이용한 생물막법에서 유기물, 질소 및 인제거에 관한 연구

이성기,송영일,김현중,진성기,김은영 조선대학교 환경공해연구소 2001 環境公害硏究 Vol.17 No.1

Anoxic and Oxic process with contact media is used to remove an organic matter, nitrogen and phosphorus in sewage which derives from domestic wastewater. Experiments have been done with various conditions that concentration of oxygen can be 3㎎/ℓ, 4~5㎎/ℓ and 5~6㎎/ℓ by controlling an retention time can be 10hr, 12hr and 14hr, return rate can be 0%, 100% and 200%. As the concentration of oxygen is 2~3㎎/ℓ, The rate of removal of BOD. COD, SS, T-N and T-P is 87%, 76%, 82%, 34% and 24%. As the concentration of oxygen is 5~6㎎/ℓ, The rate of removal of BOD, COD, SS, T-N and T-P is 92%, 84%, 88%, 45% and 33%. In the rate of removal of an organism, nitrogen and phosphorus thus It well be known that the rate of removal an organic matter, nitrogen and phosphorus will be increased as the concentration of oxygen becomes higher. As th retention time is increased, the rate of removal of BOD, COD, SS, T-N and T-P is gradually higher in the rate of removal of an organic matter, nitrogen and phosphorus. Because contact time and contact area will be increased, which generates active substrate transfer and metabolic react according to increment of retention time. As the return rate is increased, The rate of removal of BOD, COD and SS is likely to be increased, In the case of T-N, It is also increased by 28% at 0% of the return rate and by 60% at 200% of the return rate. In the case of T-P, however, It is deceased , as the return rate is increased by 42% at 0% of the return rate and by 30% at 200% of the return. As the return rate is increased the retention time is decreased, which causes less activity of bacteria which affects that the rate of removal of Phosphorus is decreased.

活性炭을 利用한 高度淨水處理에 관한 硏究(I)

이성기,김종삼,송영일,김현중 조선대학교 환경공해연구소 2004 環境公害硏究 Vol.18 No.-

The raw water quality is being more polluted recently and other minute organic pollutants are inceasing. so that, good quality water supply is getting more difficult. This study shows organic pollutants removal efficiencies of 2 types pilot plants of Cl process and Bio process in Mongtan water tretment plant. Results in this study can be summarized as follows ; The NH_(3)-N removal efficiency of Cl process was very good, 97% but, that of Bio process was very poor, 10% The THM removal efficiency of GAC process was 95%, and The THMFP removal efficiency of BAC process was 80%. Thus, It is found activated carbon was very effective for the removal of the non-polar organic matter, such as Chloroethylene, Benzene, Toluene, THM et al. The highest THM produced by chlorition are 0.17㎎/ℓ in the winter. therefore, It is found that GAC process is necessary for treatment to THM

NAP 공정을 이용한 하수의 질소 및 인 제거에 관한 연구

이성기,송영일,김현중,진성기 조선대학교 환경연구소 2000 環境硏究 Vol.16 No.1

In the process of NAP(Nightsoil Application Process)to get rid of organism, nitrogen and phosphorus, the retention time in an aerobic tank is set up 4hr, 5hr and 6hr with A1, A2 and A3 reactor the sludge return rate is 50% and the internal return rate is 200%. The change of DO, PH, MLSS, MLVSS, Alkalinity, SBOD, SCOD, Organism, SS, Nutrients and the removal rate of those conditions are followed as below. The removal rate of BOD in each reactor is 81.9% in A1, 83.9% in A2 and 87.2% in A3. The average removal rate of COD is 82.3% in A1, 83.6% in A2 and 88.0% in A3. The average removal rate of SS is 81.9% in A1, 83.9% in A2 and 87.2% in A3. The results show that A3 reactor, which has longer retention time than others in the aerobic tank has better removal rate of organism and SS. The average removal rate of T-N in each reactor is 51.4% in A1, 51.8% in A2 and 60.3% in A3. The average removal rate of T-N is 43.4% in A1, 46.0% in A2 and 52.78% in A3. It indicates that the removal rate is higher when the retention time in the aerobic tank is increased. NAP process can be operated that inserting nightsoil which causes to increase C/N in a reactor affects microorganism activity and increases the removal rate of nutrients in the spite of the decrease of the retention time. If the reactor conditions which are internal return rate, return sludge rate and volume of inserting nightsoil are set up properly. The removal rate can be higher in NAP process than in DNR process in which nightsoil is not inserted.

NAP 공정을 이용한 하수의 질소 및 인 제거에 관한 연구

이성기,송영일,김현중,진성기 조선대학교 환경공해연구소 2000 環境公害硏究 Vol.16 No.1

In the process of NAP(Nightsoil Application Process)to get rid of organism, nitrogen and phosphorus, the retention time in an aerobic tank is set up 4hr, 5hr and 6hr with Al, A2 and A3 reactor the sludge return rate is 50% and the internal return rate is 200%. The change of DO, PH, MLSS, MLVSS, Alkalinity, SBOD, SCOD, Organism, SS, Nutrients and the removal rate of those conditions are followed as below. The removal rate of BOD in each reactor is 81.9% in A1, 83.9% in A2 and 87.2% in A3. The average removal rate of COD is 82.3% in A1, 83.6% in A2 and 88.0% in A3. The average removal rate of SS is 81.9% in A1, 83.9% in A2 and 87.2% in A3. The results show that A3 reactor, which has longer retention time than others in the aerobic tank has better removal rate of organism and SS. The average removal rate of T-N in each reactor is 51.4% in A1, 51.8% in A2 and 60.3% in A3. The average removal rate of T-P is 43.4% in A1, 46.0% in A2 and 52.78% in A3. It indicates that the removal rate is higher when the retention time in the aerobic tank is increased. NAP process can be operated that inserting nightsoil which causes to increase C/N in a reactor affects microorganism activity and increases the removal rate of nutrients in the spite of the decrease of the retention time. If the reactor conditions which are internal return rate, return sludge rate and volume of inserting nightsoil are set up properly, The removal rate can be higher in NAP process than in DNR process in which nightsoil is not inserted.

로타리킬른 소각로의 연소특성에 관한 연구

이성기,박성순,송영일,김현중 조선대학교 환경공해연구소 2004 環境公害硏究 Vol.18 No.-

This study evaluated a incinerator's operating conditions that was considered by incinerating properties at Rotary Kiln one. The objectives of this study is not only the efficiency increased of incinerator but also decreased of hazardous gas. To find the optimal operation conditions of Secondary Combustion Gas processing equipment attached incineration facilities, we were strongly focus on (1) input value and property analysis of various waste (2) the caloric value analysis of main waste (3) determination of incinerator's operation condition which is affected by the kinds of waste (4) the effective operation condition of Secondary Combustion Gas process equipment. Input waste was contained Specified waste(73.8%), and Non-Specified waste(26.2%) respectively, In appointed waste, waste oil was the most portion as approximate 41%, the second one was 15% waste plastic, the last one was 7% waste oil solvents. Waste solvents of halogen group included even if its portion is very small as 0.03%. Volatile compounds was comparatively high and showed high caloric value. The effective method for reducing the Clinker at furnace is considered to analysis the Clinker's components occurred. upper method were studied along with the recycling of waste. Fe was detected by main component in the equipment which analyzed the Clinker's components. Fe concentration is 395.81ppm when its mesh size is below 200mesh(75㎛) The optimal decomposition efficiency between HCl and SOx using Ca(OH)_(2) was obtained the best results when its equivalent value was 3

Negative apparent resistivity in dipole-dipole electrical surveys

Jung, Hyun-Key,Min, Dong-Joo,Lee, Hyo Sun,Oh, Seokhoon,Chung, Hojoon Informa UK (TaylorFrancis) 2009 Exploration geophysics Vol.40 No.1

The Relationship between Expression of the Sodium/iodide Symporter Gene and the Status of Hormonal Receptors in Human Breast Cancer Tissue

Hyun Jung Oh,June-Key Chung,Joo Hyun Kang,Won Jun Kang,Dong Young Noh,박인애,정재민,Dong Soo Lee,Myung Chul Lee 대한암학회 2005 Cancer Research and Treatment Vol.37 No.4

Purpose: It has been reported that the sodium/iodide symporter (NIS) gene is expressed in several breast cancer tissues, suggesting the possibility of radionuclideimaging and therapy. However, the regulatory mechanism of NIS gene expression in breast cancer is not yet understood. To assess the relationship between the hormonal status and the NIS expression in breast cancer tissue, we investigated the NIS expression and correlated it to the expression of the thyrotropin receptor (thyroid stimulating hormone receptor, TSH-R), the estrogenreceptor (ER) and the progesterone receptor (PR) in human breast cancer tissues.Materials and Methods: Breast cancer tissues were obtained from 44 patients. Pathological examination showed 2 cases of Grade I, 17 of Grade II, 22 of Grade III, and 3 of unknown grade. We measured the expression of NIS and TSH-R genes by using RT-PCR and we measured the status of ER and PR by using immunohistochemistry.Results: The NIS gene was expressed in 15 (34%) of the 44 breast cancer tissues. The NIS gene was expressed in 32% of the cases with TSH-R gene expression. The NISgene was expressed in 40% of the breast cancer tissues with a positive PR and in 31% with a negative PR (p〉0.05). It was positive for PR in 18% of the cases and negative for PR in 39% of the cases (p〉0.05). Conclusion: The NIS gene is expressed in approximately one-third of the human breast cancer tissues. Its expression was not related to the presence of the TSH-Rgene or hormonal receptors, ER and PR. Purpose: It has been reported that the sodium/iodide symporter (NIS) gene is expressed in several breast cancer tissues, suggesting the possibility of radionuclide imaging and therapy. However, the regulatory mechanism of NIS gene expression in breast cancer is not yet understood. To assess the relationship between the hormonal status and the NIS expression in breast cancer tissue, we investigated the NIS expression and correlated it to the expression of the thyrotropin receptor (thyroid stimulating hormone receptor, TSH-R), the estrogen receptor (ER) and the progesterone receptor (PR) in human breast cancer tissues.Materials and Methods: Breast cancer tissues were obtained from 44 patients. Pathological examination showed 2 cases of Grade I, 17 of Grade II, 22 of Grade III, and 3 of unknown grade. We measured the expression of NIS and TSH-R genes by using RT-PCR and we measured the status of ER and PR by using immunohistochemistry.Results: The NIS gene was expressed in 15 (34%) of the 44 breast cancer tissues. The NIS gene was expressed in 32% of the cases with TSH-R gene expression. The NIS gene was expressed in 40% of the breast cancer tissues with a positive PR and in 31% with a negative PR (p〉0.05). It was positive for PR in 18% of the cases and negative for PR in 39% of the cases (p〉0.05).Conclusion: The NIS gene is expressed in approximately one-third of the human breast cancer tissues. Its expression was not related to the presence of the TSH-R gene or hormonal receptors, ER and PR.

Geophysical Resistivity Imaging for Upper Layer of Shield TBM Tunnel Ceiling

Jung, Hyun-Key,Park, Chul-Whan 한국암반공학회 2005 Geosystem engineering Vol.8 No.3

Recently shield TBM tunnelings are being applied to subway construction in Korean cities. Generally these kinds of tunnelings have the problems in the stability of ground such as subsidence because urban subway is constructed in the shallow depth. A sinkhole occurred on the road just above the tunnel during tunneling in Kwangju, so a survey for upper layer of the tunnel was needed. But conventional Ground Probing Radar can't be applicable due to the presence of steel-mesh screen in the shield segment, so no existent geophysical method is applicable in this site. Because the outer surface of each shield segment is electrically insulated, dipole-dipole resistivity method which is popular in engineering site investigation, was tried to this survey for the first time. Specially manufactured flexible ring-type electrodes were installed into the grouting holes at an interval of 2.4m on the ceiling. The K-Ohm II system which has been developed by KIGAM and tested successfully in many sites, was used in this site. The system consists of 1000Volt-1Ampere constant-current transmitter, optically isolated 24 bit sigma-delta A/D conversion receiver-maximum 12 channel simultaneous measurements, and graphical automatic acquisition software for easy data quality check in real time. Borehole camera logging with circular white LED lighting was also done to investigate the state of the layer. Measured resistivity data lack of some stations due to failing opening lids of holes, shows general high-low trend well. The dipole-dipole resistivity inversion results discriminate (1) one approximately 4 meter diameter cavity (grouted but incompletely hardened, so low resistivity -less than $30{\Omega}m$), (2) weak zone $(100-200{\Omega}m)$, and (3) hard zone (high resistivity-more than $1000{\Omega}m$) very well for the distance of 320 meters. The 2-D inversion neglects slight absolute 3-D effect, but we can get satisfactory and useful information. Acquired resistivity section and video tapes by borehole camera logging will be reserved and reused if some problem occurs in this site in the future.

국내 탐사 난제들 2

정현기(Hyun-Key Jung) 대한지질학회 2022 대한지질학회 학술대회 Vol.2022 No.10