Bio-Trickling Filter에 의한 담배생산공정 배출가스의 냄새 제거효율 비교

서정윤,김태형 7개 국립대학교 환경연구 논문집 공동발행 위원회 2004 공업기술연구 Vol.4 No.-

The performances of the bio-trickling filters supplied by four companies using olfactormetry in a cigaret producing industry were compared. The odor unit (OU) of the exhausted air discharged from the cigaret producing industry was from 2,000 to 20,000 OU/㎥. The each efficiency was 96.9% for Company A, 91.3% for Company C, 91.0% Company B and 83.4% for Company D. The odor unit of the each treated air was 172 for Company A, 515 for Company B, 515 for Company C and 521 for Company D. The each average resident time was 12.59, 11.75, 7.57 and 11.66 seconds for Company A, B, C and D, respectively. This experiment was performed ar the optimal operating conditions of bio-trickling filter.

소형 퇴비화용기에 의한 퇴비화 가능한 가정 폐기물의 퇴비화과정 중 우드칩 첨가가 분해율과 퇴비의 이·화학성에 미치는 영향

서정윤 7개 국립대학교 환경연구 논문집 공동발행 위원회 2003 공업기술연구 Vol.3 No.-

Compostable household wastes (mainly food residues) were composted in a small bin for 41 days, in which compostable household wastes were fed every day and mixed thoroughly under aerobic conditions. Three small bins were employed. In the first bin, only woodchip(less than 5 mm) was composted(Case Ⅰ), in the second, compostable household wastes with the woodchip(Case Ⅱ), and in the third, only compostable household wastes (Case Ⅲ). The correct decomposition rate of each composting material was calculated during composting. Total reduction rate of the weight after 41 days was 58.78% when composting the compostable household wastes with the woodchip and in the case calculated with only compostable household wastes the weight reduction rate was 61.23% but 70.78% when composting only compostable household wastes. In the case of composting the compostable household wastes with the woodchip, the total decomposition rate after 41 days was 23.48% and that of only fed household wastes 23.44%. Their difference was not great. But in the case of composting only compostable household wastes the decomposition rate was 26.15%. It means that the woodchip reduces the decomposition rate as much as 2.71% and hinders the evaporation of the water in the composting materials. pH value, and concentrations of NaCl, Cr and Cu in the woodchip increased during composting time. In the case of composting compostable household wastes with the woodchip pH value and organic matter concentration in the composting mixture increased but concentrations of Kjeldahl-N, NaCl, P_(2)O_(5), Cr and Cu decreased due to chemical characteristics of the woodchip.

제올라이트 칼럼에 의한 인공생활하수처리

서정윤 한국환경농학회 2002 한국환경농학회지 Vol.21 No.3

제올라이트를 식물 여과상의 여재로 사용가능성을 평가하고 설계 인자를 얻기 위하여 식물을 식재하지 않고 제올라이트만 칼럼에 충전하여 유기물, 인 질소 등의 제거효율 분석하여 최적 수리학적 부하, 최적 여재의 입경범위 결정 그리고 원수의 상·하향류 주입에 따른 제거효율을 비교하였다. 그 결과는 다음과 같다. 입경 범위 0.5∼l mm와 1∼3 mm인 두 종류의 제올라이트를 부피비 1 : 1로 혼합하여 높이 1 m에서 수리학적 부하53, 113, 160, 314, 450, 667 L/m^2·4로 변화시키며 실험한 결과 수리학적 314 L/m^2·d에서 COD_cr, 94.63%, T-P 41.41%,T-N 90.46%과 NH_4^+-N 99.75% 정도로 안정적으로 제거되었다. 제올라이트 입경 0.5∼1 mm와 1∼3 mm의 혼합비를 1.1(I), 1 : 3 (ll), 1∼3 mm만을 여재(III)로 사용하여, 수리학적 부하 314 L/m^2·d로 동일하게 각 칼럼에 주입한 결과T-N과 NH_4^+-N은 입경의 변화에 관계없이 87%, 99%이상의 높은 제거율을 보였고, COD_cr의 경우 I, II에서 89%이상의 높은 제거율을 보였다. 반면 T-P의 경우는 입경에 관계없이56.42∼58.71% 제거되었다. 그러나 1∼3 mm인 제올라이트에서 제거효율이 약간 좋지 않아 두 제올라이트를 1 : 1로 혼합한 여재가 적합하였다. 수리학적 부차 314 L/m^2·d, 제올라이트 입경 0.5∼l mm와 1∼3 mm를 1 : 1로 혼합한 여재 높이 100 cm에서 원수를 하향류 및 상향류로 주입하면서 하향류 20, 40, 80, 100 cm 상향류 20, 40, 60, 50, 100 cm에서 시료를 채취하여 분석한 결과 모두 원수가 주입되는 부근 여재높이 20 cm에서 가장 많이 제거되었다. 상향류 보다 하향류로 원수를 주입했을 때 제거효율이 높았다. Constructed wetlands typically cost less to build and operate, and require less energy than standard mechanical treatment technology but they have similar performance to centralized wastewater treatment plants. Therefore, they were constructed especially many in rural areas, where are small villages but not industries. plantless colunm tests were performed to investigate the possibility on using zeolite as a filter medium of constructed wetland for the wastewater treatment. Removal efficiency was COD_(Cr) 94.63%, T-P 41.41% and NH_4^+-N 99.75% at hydraulic load 314 L/㎡·d and filtering height 100 cm filled with a zeolite mixture. This zeolite mixture consisted of 1 : 1 by volume of zeolites in the diameter range of 0.5 to 1 mm and 1 to 3 mm. Accordingly, hydraulic load 314 L/㎡·d was considered as optimal. Three zeolite mixtures were used to determine the optimal mixing ratio by volume of a zeolite (A) in the diameter range of 0.5 to 1 mm to a zeolite (B) in the diameter range of 1 to 3 mm. 1 : 3, 1 : 1 and only B in A to B by volume were tested at hydraulic load 314 L/㎡·d and filtering height 100 cm. COD_(Cr) removal efficiency was more than 89% at mixing ratios of 1 : 3 and 1 : 1 in A to B. That of T-P ranged 56.42 to 58.72% and, that of T-N and NH_4^+-N was 87% and 99% regardless of mixing ratios of two zeolites. Removal efficiency was lower at the column filled with only B. Removal efficiency was better at filter medium filled with mixing ratio 1 : 1 in A to B than with the other mixing ratios. Thus, it was found that the mixture of mixing ratio 1 : 1 in A to B was appropriate for filter medium of constructed wetland. Removal efficiency was higher in down-flow than in up-flow, and all contaminants were removed most in 20 cm filter height near feeding area.

천마의 GABA-benzodiazepine 수용체 복합체에 대한 조절작용

하정희,이동웅,어경윤,하정상,김현주,용철순,허근 영남대학교 약품개발연구소 1998 영남대학교 약품개발연구소 연구업적집 Vol.8 No.-

Methanol extract of G. elata inhibited the binding of [³H]Ro15-1788, a selective benzodiazepine receptor antagonist, to benzodiazepine receptor of rat cortices. Saturation experiments followed by Scatchard analysis of the results showed that the inhibition of [³H]Ro15-1788 binding by G. elata. appeared to be competitive. These competitive inhibiton of the butanol fraction was observed to be higher than the methanol extract. Methanol extract of G. elata inhibited a [³H]flunitrazepam, a selective benzodiazepine receptor agonist, binding to benzodiazepine receptor. GABA significantly enhanced the inhibition of [³H]flunitrazepam binding by G. elata, and these "positive GABA shift" supported the strong possibility of agonistic activity to benzodiazepine receptor. Butanol fraction was observed to be higher than crude extract by methanol in an agonistic activity to benzodiazepine receptor, furthermore enhanced the binding of [³H]SR95531 to GABA_(A) receptor. Butanol fraction of G. elata significantly diminished the pentylenetetrazole-induced lethality of mice. From these results, it can be concluded that substance or substances with neurochemical properties characteristic of a benzodiazepine receptor agonist may be important components, and contribute to the anticonvulsant property of G. elata.

악취성 폐기 가스중의 암모니아 농도를 줄이기 위한 생물학적 활성 필터층의 최적 생물학적 조건

서정윤 國立 昌原大學校 産業技術硏究所 1990 産技硏論文集 Vol.4 No.-

Optimal biological conditions of a biofilter from sawdust and wood shavings were shavings were investigated for minimizing ammonia concentration in odorous exhaust air. Ammonia was removed best efficiently at 2 : 1 mixing rate of sawdust and wood shavings for filter material. water content of 70%, pH-value of 5.67 and temperature of 41℃in input. The C/N-ratio of filter material higher than 26 and the addition of mineral substances to filter material showed no difference in cleaning efficiency of ammonia in input

스텝응답을 이용한 공정의 전달함수 동조

윤양웅,최정내,김진권 원광대학교 2001 論文集 Vol.26 No.-

논문에서는 공정동조를 위한 새로운 방법을 제시한다. 미지의 동특성을 가지는 공정은 PID 제어기를 적용하기 위해 2차 전달함수로 모델링된다. 우선 오버슈트(os), 정정시간 (ts), 정상상태 값 (yss)가 미지공정의 스텝응답으로부터 얻어지고, 위의 세가지의 파라메터를 이용하여, 전달함수를 얻을수 있다. 제안된 동조방법의 우수성을 보이기 위해 다른 동조방법들과 시뮬레이션을 통하여 비교하여 제시하였다. In this paper, a new method for system identification is proposed. Unknown dynamic system is identified to the second order transfer function, which can be applied to PID controller design. First, overshoot(os), settling time(ts), and steady state value(yss) are obtained from the step response of unknown dynamic system. And then, we can get the second order transfer function using equations which are extracted from those three parameters(os, ts, yss) through mathmatical analysis. In addition, simulation is carried out to show excellent performance of proposed identification method compare with other.

豚糞尿液肥 施用이 土壤 重金屬 含量에 미치는 影響

성재경,서정윤 7개 국립대학교 환경연구논문집 공동발행 위원회 2005 공업기술연구 Vol.5 No.-

This experiment was carried out to analyze the effect of liquid pig manure(LPM) application on the amount of heavy metals in paddy soil(Geo-chang) in 2004 and 2005. The analysis of heavy metals in LPM during maturing period, in swine feed which is producted in Gyeong-nam provice and in paddy soil of LPM application plot, Chemical fertilizer application plot and no manure application plot was conducted with ICP(Inductively coupled plasma Emission Spectroscopy, GBC, Australia). The results are as follows. The amount of heavy metals in LPM kept constant during maturing period. and we knew that more amount of copper and zinc was added in swine feed than the requirement amount of copper & zinc in swine. Finally it could be concluded that LPM application did not effective on environmental paddy soil.

폐광산폐수의 소택지 처리를 위한 석회석의 화학적 전처리

김은호,서정윤 7개 국립대학교 환경연구 논문집 공동발행 위원회 2003 공업기술연구 Vol.3 No.-

This study was carried out to investigate chemical pretreatment using lime and limestone for wetland treatment of an abandoned mine drainage. If treating the abandoned mine drainage with lime, after 2 hrs, removal efficiencies of SO_(4)^(2-), Fe, Al, Pb and Mn were 5.7, 63, 57, 45 and 28%, respectively. It was estimated that lime dosage was 2,000mg/L for increasing to pH 7. If treating the abandoned mine drainage with limestone, after 2 hrs, pH was increased to 3.67, and removal efficiencies of SO_(4)^(2-), Fe, Al, Pb and Mn were 4.7, 26, 22, 18 and 8%, respectively. It could be showed that limestone did slowly react with temperature increase. If treating the abandoned mine drainage in anaerobic limestone packing column, for experimental periods, pH was average 4.51, and removal efficiencies of SO_(4)^(2-), Fe, Al, Pb and Mn were average 4.5, 15.3, 20.1 23.7 and 5.87%, respectively. Therefore, limestone would not be suitable for the abandoned mine drainage. But the abandoned mine drainage could be stablily treated in wetland, after it passed through limestone packing column, becuase it was strong acid.

지양호의 오염원 및 수질 조사

하호성,서정윤,진종석,이근석 경상대학교 환경보전연구소 1994 環境保全硏究所報 Vol.2 No.1

The upper area of the Chinyang Lake was devided into four segments, the Gyeongho River, the Yangcheon River, the Deokcheon River and the vicinity of the Chinyang Lake. The water pollution sources and the water quality of four segments were investigated and evaluated. This region was composed of a Dong in a city and 141 Ries in 6 Guns except for Yurunggun and Namwongun. Population density is low in all area except for Hamyang Up and Sancheong Up. Population is 84.903(58%) in the vicinity of the Gyeongho River, 26,093(18%) in the Yangcheon River, 23,039(16%) in the Deokcheon River and 11,468(8%) in the Chinyang Lake. Total occurance of BOD in the upper area of the Chinyang Lake was 45,493 ㎏/day, whose 66% was generated from domestic animals, 17% from the land and 26% from human wastes, respectively. The occurance of BOD in the views of segments analysis showed that 57.1% originated from the vicinity of the Gyeongho River, 28.4% from that of the Yangcheon River, 9.8% from that of the Deokcheon River and 4.8% from that of the Chinyang Lake. The most amount of BOD was discharged to the Gyeongho River, the second to the Deokcheon River and the least to the Chinyang Lake. Total occurance of SS in the upper area of the Chinyang Lake was 137,445 ㎏/day. The most amount of SS was discharged to the Gyeongho River, the second to the Yangcheon River, and the least to the Chinyang Lake. The waste of domestic animal produced the 66% of BOD and the 92% of SS in their total occurance and the 31% of BOD and the 76% of SS in their total discharge. It is concluded that the waste of domestic animal is the important pollution sources, which greatly impact the water quality of the Chinyang Lake. Total nitrogen and phosphorous content in the water of the upstream of the Chinyang Lake were very high. The water quality of the Yangcheon and the Deokcheon River was classified as 4 grade by high pH and numbers of coliform group especially. The high nitrogen content in the upstream of the Gyeongho and the Yangcheon River implies that much nitrogen is originated from the farm land. It is found that the Chinyang Lake is in the process of the eutrophication.

오리나무 열매를 이용한 생물처리장치에서의 톨루엔 가스 처리효율 특성

공남식,차수길,서정윤 한국대기환경학회 2003 한국대기환경학회지 Vol.19 No.6

This study was to examine characteristics of treating toluene vapor, which gets to be problematic due to its harmful carcinogenicity and mass generation from various sources, through a biological treatment facility which is environment-friendly and adopts a high-efficient and low-cost clean technology. In order to identify whether Alnus Firma Fruit (AFF) can be used as a media for a bioreactor, its utility and basic operating factors, a study was conducted on pressure drop, supply of nutrient substances and retention time which are operating factors of a biofilter, and eliminating characteristics were compared between AFF and the conventional biological activated carbon (BAC) widely used as filter media. In the case of AFF, the initial microbial deposits was 2.3 X 10^(7) CFU/g dry AFF, which represents the initial microbial density higher than the case of BAC showing 5.5 x 10^(6) CFU/g dry BAC. And it took about 2 weeks to acclimate until its eliminating rate got to be increased over 90%. As a result of comparing pressure loss taking place with the lapse of time between BAC and AFF, after 130 days passed at SV 25 h^(-1), BAC showed that its eliminating efficiency had a tendency to drop greatly due to a great pressure loss (0.53-> 54.7 ㎜H₂O/m) caused by an excess of biomass as accumulated. On the other hand, AFF showed that the pressure drop was 0.53 ㎜H₂O/m, about 2 times as much as the initial pressure loss of 0.4 ㎜H₂O/m, which represents no great change in the pressure loss, and its eliminating efficiency was also shown to be continuously high. Therefore, when AFF was used as a filler for a biological treatment facility, a biological filter enabling improvement of the purifying efficiency to be promoted could be provided, and moreover, the pressure loss was so small that the filler replacement cycle or the back flushing cycle could be extended. So, even in terms of the operating cost, it was identified to be an economical filler. When an inorganic material was used as a filler, the biofilters performance acted sensitively on whether nutrient substances were supplied or not. In the case of AFF with low adsorptivity, addition of ethyl-alcohol increased the solubility of toluene, and consequently, biodegradation got to be actively made by microbes, and thus, its eliminating rate could be increased. As the flow velocity and the inflow concentration got to be more increased, its eliminating rate got to be lower, and particularly, an increase in the flow velocity made its eliminating rate drop more greatly than an increase in the concentration.