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.

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

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.

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.

슬러리 돈사폐수의 특성

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

In this study, we surveyed pollutant concentrations of wastewater from slurry type piggery. Pollutant concentrations in each season showed very different aspect by sampling time and were in high level. Pollutant concentrations in slurry type piggery wastewater were higher than in scrapper type piggery wastewater. Most of heavy metal concentrations was lower than threshold concentrations for biological treatment, so it was estimated that microoganism would not be impeded by the heavy metals when they were removed as the biological method. As we investigated generation unit of slurry type piggery wastewater in each season, each numerical value was 6.5 in the spring, 7.1 in the summer, 6.5 in the fall and 5.8 L/head·day in the winter. From these we could see that while in the summer the unit records the highest value, the amount in the winter was the lowest and the same numerical value in both summer and fall. Discharge loading of slurry type piggery wastewater in each season was SS 586.6, BOD 92.5, CODcr 219.2, T-N 24.0 and T-P 4.0 g/head·day. But discharge loading of SS was higher by a factor of 1.65 than discharge loading that ministry of environment exhibited, whereas numerical value for other items was lower, for example CODcr.

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.

Municipal Wastewater Treatment in Arid Countries Using an Anaerobic Bioreactor with External Cross Flow Membrane Filtration

Jeoung-Yoon Seo,Bernd Fitzke,Sven-Uwe Geissen 대한환경공학회 2013 대한환경공학회 학술발표논문집 Vol.2013 No.6

Comparative Test on Single- and Two-Stage Ammonium Oxidation of an Ammonium-Rich Wastewater

Seo, Jeoung-Yoon,Tobias Gaul,Sabine Kunst 7개 국립대학교 환경연구논문집 공동발행 위원회 2005 공업기술연구 Vol.5 No.-

To efficiently remove nitrogens of sludge liquor from the sludge digestion devatering facility of The Communal Wastewater Treatmment Plant in Osnabruck, Germany, biotechnological deammonification prosesses are tested. This sludge liquor was treated biologically in single-(V=1.0㎥) and two-stange reactor(V=2x0.5㎥) during a test period of over 9 months in order to compare which system is more suitable for the ammonium elimination. All the operating parameters were set at a range where the nitratation couble be sufficiently inhibited. Nevertheless, both pilot plants could not remove the nitrogen of the sludge liquor in optimum. In single-stage reactor, an average removal efficiency of 29.8% for ammonium, and 19.5% for total nitrogen, was observed related to the influent load, whereas in two-stage reactor, 4.5, 25.3%, for ammonium in the first and in the second reactor, 11.5 and 14.0% for total nitrogen in the first and in the second reactor, respectively. In addition, an average nitrogen elimination rate in single-stage reactor was 0.06kg NH_(4)^(1)-Nm^(3)_(reactor) d^(-1)(29.8%) and 0.04kg N_(total)m^(-3)_(reactor)d^(1)(19.5%), while in two-stage reactor, an average elimination rate in respect to the influent flou to the first reactor was 0.08kg NH_(4)^(+)-Nm^(-3)_(reactor)d^(-1)(21.1%), 0.01kg NH_(4)^(+)-Nm^(-3)_(reactor) d^(-1)(2.6%) for the first and the second reactor 0.03kg N_(reactor) d^(-1)(7.9%) and 0.01kg N_(total) d^(-1)(2.6%) for first and second reactor. The avcrage NH_(4)^(+)-N removal effciency was a little higher by 8.8% in single-stage reactor than in two-stage reactor. An average COD_(Cr) removal efficiency for single-stage reactor, first and secod reactor of two-stage reactor was 46.0, 35,5 and 35,8%, respectively. The nitrate concentration was very low during the experimintal period except for the early short period. An average dilution rate was 0.38d^(-1) for single-stage reactor adn 0.64d^(-1) for each reactor of two-stage reactor.