G-공장부지의 토양 분석실험

안준수 대진대학교 1996 大眞論叢 Vol.4 No.-

A sample survey was performed for the two working places (Incheon and Pupyong) to measure the level of soil contamination. The experimental analysis showed that the amount of the volatile component from the Pupyong A area was 4.66%, which means 55% higher than that of the other areas. The amount from the other areas was about 3%. It's believed the soil contamination was caused from the factory. pH was weak basic (7.4-7.6) and CN was 0-0.14ppm. TOC was about 179.9 ppm from the Pupyong A area. which was also three times as high as the average of the other areas. Organic compounds might be responsible for that ; the more precise survey is needed to study the contamination. The measurements for the heavy metals such as Hg, Cd, As, Pb, Cr, and Cu from the other areas were lower than the standard level, however the amounts of the elements from the Pupyong A area were 3-10 times as high as the other areas ; a special care is needed for these.

Hollow Fiber Membrane을 이용한 기체 분리 특성에 관한 연구

안준수 대진대학교 1994 大眞論叢 Vol.2 No.-

This dissertation was primarily to find the separation charateristics of pure CH₄, CO₂ gas, using polyimide hollow fiber membrane separation system. For the purpose, an experiment on the sorption-permeation characteristics of CO₂, CH₄ pure gases was made. The experimental conditions were as follows: feed flow rate 0~15 l/min, system temperature 30~70 ℃ , and applied pressure 0~20 bar. The membrane materials used in the experiments were a kind of polyimide, glassy polymer The permeability of them could be fully explained by the partial immobilized dual-mode sorption model. The temperature dependence of the permeability to penetrant could be showed with Arrhenius type, and then the activation energies of CO₂ and CH₄ were 1038 and 1927 kJ/mol respectively. Ideal separation factor(α^(*)=P_(A)/P_(B)), the permeability ratio of the two gases, was a little decreased according to the increase of feed pressure, while in much larger scale decreased with the increase of system temperature. And when the deviation to the nonideality was observed, with fugacity instead of pressure as permeation driving force, the difference was found within 5 % under the range of this experimental condition(0∼20 bar).

공기공급방식별 계분 퇴비화의 분해율 비교에 관한 연구

金丙泰,安俊帥,朴泰術 대진대학교 1994 大眞論叢 Vol.2 No.-

Composting has had little practical use in solid wastes disposal until now because of a lack of understanding of process control. Ventilation control was reported to be convenient to operate and maintain good product quality during composting. This study was carried out to compare the degration rate and evaluate optimum temperature for composting of poultry manure by the aeration method. Substrate losses were investigated by the degradation rate of total, dry, volatile matter, carbohydrates, lipids and proteins. The optimum temperature for composting of poultry manure was estimated by the CO₂ production rate and O₂consumption rate. The period of initial heating stage, thermophilic stage and transition stage in the temperature feedback aeration method was longer 2days than that of constant aeration method The degradation rate in the temperature feedback aeration method was higher than that in the constant aeration method The degadation rate in both aeration methods peaked in the thermophilic region. Dry matter was degraded about 58~59% until the thermophilic region. The variation of gas exchange was similar to that of temperature On the basis of the recommened range of CO₂ production rate and O₂ consumption rate, the optimum temperature range for composting of poultry manure appears to be below 60℃.

A study on the determination of the most preferred method for the livestock waste treatment

June Shu Ahn,Kwi Nam Park 한국폐기물자원순환학회 2003 한국폐기물자원순환학회 학술대회 Vol.2003 No.1

A study on the determination of the most preferred method for the livestock waste treatment

( June Shu Ahn ),( Kwi Nam Park ) 한국폐기물자원순환학회(구 한국폐기물학회) 2003 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2003 No.-

Fenton 산화공법을 적용한 염색폐수처리 연구

안준수(Ahn, June-Shu),박태술(Park, Tae-Sool),조정호(Cho, Jung-Ho) 한국산학기술학회 2011 한국산학기술학회논문지 Vol.12 No.9

본 연구는 염색폐수 처리시설에서 생물학적공정(2차) 처리를 거처 배출되고 있는 방류수 중에 미처리되어 잔존 하고 있는 난분해성 유기물(COD) 성분을 제거하기 위하여, 고도처리공법으로서 Fenton 산화공정을 적용하여, 공법의 적용 가능성과 최적의 운전조건을 얻고자, 실험실 실험과 Pilot Plant 현장 운전을 실시하였다. 본 Fenton 산화실험의 원수로 사용된 생물학적(2차) 처리수의 수질은 실험기간동안 CODMn 30∼50mg/L으로 측정되었다. Fenton 산화반응 실 험 결과, 최적의 반응조건은 pH 3∼3.5, 반응시간 2∼2.5시간, 약품 주입량비(FeCl2(33%)/H2O2(35%)) 3 : 1 로 나타났다. 약품 주입량 비가 적정조건일 때, 슬러지 발생량(SV2hr)은 전체 양의 21∼28% 범위인 것으로 측정되었다. Pilot Plant 실험 결과, 산화반응조의 체류시간 변화에 따라 처리효율이 크게 영향을 받고 있었으며, 적정 체류시간은 2.0시간 이었 다. 현장에 Pilot Plant(2m<SUP>3<SUP>/d)를 설치하여 연속운전을 실시한 결과, COD 농도가 제거효율 면에서 60∼70%를 나타내었 고, 처리수질은 20mg/L 이하로 측정되어, 대체로 안정적이고 양호한 처리효율을 나타내고 있었다. In this study, Fenton reaction was studied for the possibility of applying as advanced treatment and its optimal condition for the removal of refractory organics from the dye wastewater. Fenton reaction was applied to remove refractory organics after the bio-treatment (secondary treatment) inside test laboratory and on-site pilot plant. Wastewater from the secondary treatment was used and its CODMn was measured as 30∼50mg/L. After the Fenton reaction, the optimal condition was found as pH 3∼3.5, reaction time 2∼2.5hr, chemical input ratio of (FeCl2(33%)/H2O2(35%)) was 3 : 1. When chemical input ratio of (FeCl2(33%)/H2O2(35%)) was at its optimal, amount of sludge volume (SV2hr) was 21∼28%. With pilot plant test, removal rate was heavily influenced by the hydraulic retention time(HRT), and optimum value of HRT was 2.0 hr. When pilot plant(2m<SUP>3<SUP>/d) was placed on-site and operated continuously, it showed steady and fairly good treatment of COD where COD removal rate was 60∼70%, treated water showed below 20mg/L.

타격기류 건조장치에 의한 하수슬러지의 건조 실증실험에 관한 연구

안준수(Ahn, June-Shu),김병태(Kim, Byung-Tae),조정호(Cho, Jung-Ho) 한국산학기술학회 2012 한국산학기술학회논문지 Vol.13 No.11

본 연구에서는 하수슬러지를 효율적으로 건조시킬 수 있는 방법을 연구하고자 하였다. 슬러지 건조를 위 해서는 슬러지 내 대부분의 함수율을 차지하고 있는 세포 내 함유수분을 제거시키는 것이 필요한데, 이에 대한 제거 장치로서 타격기류 건조장치를 적용하였으며, 직접 하수처리장에 파일롯 플랜트를 설치하여 실증실험을 실시 하여, 이에 대한 운전특성과 적용가능성을 확인하고자 하였다. 주요 운전제어 변수는 슬러지 투입속도, 체인 회전속도, 공정온도 및 투입슬러지 함수율 변화 등이다. 체인의 회 전속도가 증가할수록 생성슬러지 생성수율 증가 등 장치성능이 향상되었고, 공정온도가 상승함에 따라 건조효율이 증가하는 경향을 나타내었다. 투입슬러지 함수율은 60%일 때 생성슬러지 생성수율이 최대이고 함수율도 10% 내 외를 나타내어 최적 조건임을 알 수 있었다. 슬러지 투입속도는 적정 투입속도 이상으로 투입 시, 생성슬러지 생 산량은 증가하지 않는 반면, 오히려 잔류량만 증가하는 현상을 초래하였다. 위와 같은 실험결과로부터 장치의 최 적 운전조건은 체인 회전수 1600rpm(최대속도), 최종 배출온도 80℃, 투입슬러지 함수율 60%, 슬러지 투입속도 60kg/h이며, 이때 장치성능은 생성슬러지 생성수율 85.5%, 함수율 11.0%, 건조효율 81.7% 으로 양호한 결과를 나타내었다. Effective drying method of sewage sludge is researched in this study. To dry the sludge, chain crusher flash dryer was adopted to remove moisture content in the cell which is mostly responsible for the sludge moisture content. And Pilot plant experiment was conducted in real life sewage treatment plant to study effect and characteristics of operating conditions. Operating variables include sludge feeding rate, rotational speed of chain, process temperature and feed moisture content. As rotational speed of chain increased, product yield of sludge increased, and the performance of the testing system increased. And, as process temperature increased, the sludge drying efficiency increased. It is found that optimum feed moisture content is at 60% which shows the maximum sludge product yield and about 10 moisture content(%) of sludge product. Sludge feed rate showed optimal value, and when the sludge feed rate is exceeded, sludge product yield did not increased but the amount of residue increased. Pilot plant experiment results are as follow. The optimal condition for the rotational speed of chain 1600rpm(max. speed), final sludge discharge temperature 80℃, feed moisture content 60%, and feed rate 60kg/h. When the plant was operated at the optimal conditions, the final product showed fairly good results such as sludge product yield 85.5%, moisture content 11.0% and sludge drying efficiency 81.7%.

고도처리공법이 적용된 하수처리시설에서의 공법적용의 적정성 평가

안준수(Ahn, June-Shu),박태술(Park, Tae-Sool),조정호(Cho, Jung-Ho) 한국산학기술학회 2010 한국산학기술학회논문지 Vol.11 No.10

본 연구는 고도처리공법을 적용하여 수년간 가동 중인 하수처리시설에 대한 운전현황을 측정·분석하여, 고도처리공법 적용의 적정성을 평가하고자 하였다. 단위공정별 처리효율은, BOD의 경우 1차침전지 35, 생물반응조 87, 최종방류수 48 %, T-N의 경우 1차침전지 18, 생물반응조 40, 최종방류수 25 %, T-P의 경우 1차침전지 23,, 생 물반응조 38, 최종방류수25 % 등으로, 각 단위공정별로 양호한 처리효율을 나타내었다. 생물반응조 내의 미생물 관 측 결과, 다양한 종류의 세균과 원생동물 및 후생동물이 관측되었고, 담체의 세균 부착기능이 안정적으로 유지되고 있음을 알 수 있었다. 최종방류수질은 BOD 5.5, COD 9.9, SS 4.6, T-N 11.8, T-P 0.99 ㎎/L으로 방류수 수질기준보 다 낮은 양호한 수질상태를 나타내었다. In this study, validity of wastewater treatment system with advanced treatment processes was evaluated by studying its operational conditions by applying the advanced treatment to the wastewater treatment system which was operating for last several years. Study indicated a fair result for the removal efficiencies of BOD, T-P, and T-N for each unit operation. BOD removal efficiencies for primary clarifier, bioreactor, final effluent are 35, 87, and 48 % respectively. T-P(T-N) removal efficiencies for primary clarifier, bioreactor, final effluent are 18(23), 40(38), and 25(25) % respectively. Further investigation of bioreactor showed that various microorganism such as bacteria, protozoa, and metazoa is present in the bioreactor, and the main function of the media, adhesion (adsorption) of microorganism onto the media, is stabilized. Final effluent quality was lower than the regulation, and BOD, COD, SS, T-N, T-P were 5.5, 9.9, 4.6, 11.8, 0.99 ㎎/L respectively.

공장폐수가 혼합된 하수처리장의 하수처리 특성

안준수(Ahn, June-Shu),박욱근(Park, Wook-Keun),조정호(Cho, Jung-Ho) 한국산학기술학회 2011 한국산학기술학회논문지 Vol.12 No.7

본 연구는 간헐적으로 공장폐수가 유입되고 있는 하수처리시설에 대하여 각 단위공정별 운전현황 조사와 수질 측정을 실시하여 운전특성을 파악하고자 하였다. 생물반응조의 운전조건은 MLSS 농도 2,000∼3,000 mg/L, HRT 5.3∼16.3 시간, SRT 2.8∼66.6 일 범위를 나타내었고, SVI는, 최적 범위인 50∼150을 상회하여, 200 이상의 측 정값이 빈번히 발생하여 슬러지 침강성이 양호하지 않은 것으로 관측되었다. 주요 원인은 공장폐수의 유입에 기인한 것으로 판단되며, 이와 같이 공장폐수 유입 시 생물반응조내의 MLDO가 급격히 상승하고 질산화 효율이 빠르게 감 소하며 이차침전지에서는 Pin floc.이 유출되는 현상이 발생하였다. 미생물 관측결과, 다양한 세균 플록과 섬모충류 등이 관측되었으나, Bulking 발생의 원인이 되는 사상균인 Sphaeotilus와 방선균 등도 발견되었다. 단위공정별 처리효 율은 평균적으로는 대체로 양호한 처리효율을 나타내고 있었으나 간헐적인 공장폐수 유입의 영향으로 인한 생물반응 조의 운전특성의 불안정성으로, 처리효율의 변동성이 크게 나타나고 있었다. In this study, characteristics of wastewater treatment of sewage intermittently mixed with industrial wastewater is examined by investigating the operational status of each unit operation and measuring water quality. The bioreactor operating condition was measured for MLSS concentration 2,000∼3,000 mg/L, HRT 5.3 ∼16.3 hour, SRT 2.8∼66.6 day, and SVI frequently showed the value above 200 which was higher than the optimal range of 50∼150. It is thought that the sludge is not in suitable condition for sedimentation caused by the incoming industrial wastewater. When industrial wastewater is come into the system, MLDO inside of bioreactor rapidly increased, rate of nitrification is steeply decreased, and Pin floc. is spilled in the secondary clarifier. In the observance of microorganism showed that various bacterial floc. and ciliata were found as well as actinomycetes and filamentous bacteria(Sphaeotilus) which is known to cause bulking. Efficiency of each unit operation was fairly good in average. However, efficiency of the bioreactor treatment showed high fluctuation by unstable operating condition by intermittently incoming industrial wastewater.

연구발표논문초록 ( 에너지 / 환경 (3) ) : 생활하수의 염소처리에 관한 연구

안준수,김시환,이승무 ( June Shu Ahn,Si Haon Kim,Sung Moo Lee ) 한국화학공학회 1989 추계학술발표회 Vol.- No.-