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기존 활성슬러지 공법의 오일폐수 처리특성 향상을 위한 한외여과막의 조합에 관한 연구
이택순(Taek Soon Lee),서규태(Gyu Tae Seo),문병헌(Byung Hyun Moon),최광수(Kwang Soo Choi) 한국수처리학회 1997 한국수처리학회지 Vol.5 No.4
This paper focuses on enhancing an existing physico-chemical process followed by activated sludge process for treatment of oily wastewater from metal processing work in an automobile manufacturing plant. A hybrid membrane separation activated sludge system was investigated in this study as an alternative for stable treatment of the oily wastewater. From the biodegradability test, it was shown that dissolved organic matter in the wastewater could be effectively removed by biological process. SCODcr Removal efficiency was higher than 90% at more than 10 days HRT(SRT) and 75∼80% removal of N-hexane for oil substance. However, during the experiment, settling characteristic of biomass was deteriorated by extended retation time. Organic rejection by ultrafiltration membrane with MWCO 20,000 was around 15% in terms of SCODcr showing that the oily wastewater contains almost soluble organic matters with molecular weight less than 20,000. However the hybrid membrane separation activated sludge system could produce significantly high removal efficiency of more than 95% in treatment of the oily wastewater from both one stage and two stage chemical treatment. Consequently this membrane coupled activated sludge system could be obviously a stable alternative process of conventional physico-chemical and biological treatment.
경상남도의 효율적 빗물관리를 위한 GIS 기반 물순환 체계 분석
이택순 ( Taek Soon Lee ),송봉근 ( Bong Geun Song ),한치복 ( Chi Bok Han ),박경훈 ( Kyung Hun Park ) 한국지리정보학회 2011 한국지리정보학회지 Vol.14 No.2
The objective of this paper is to analyze the GIS-based water cycle system: rainfall, evapotranspiration, surface run-off of Gyeongsanam-do for the effective rainwater management. The rainfall(1999~2008) analyzed by a spatial interpolation method, showed relatively higher amount in Hadong-gun, Sanchung-gun, and Sacheon-gun on the southwest coast than in Changnyeong-gun, Miryang-si, and Changwon-si in the mideast inland. The evapotranspiration was calculated by the three independent variables: air temperature, landuse, and NDVI(normalized difference vegetation index). The analysis showed that Namhae-gun had the highest evapotranspiration of 93.71mm, and Jinhae-si and Changwon-si had the lowest values of 81.78mm and 84.37mm. The surface run-off was analysed by a run-off equation based on the SCS hydrologic soil classification and landuse. The amount of surface run-off showed that Hadong-gun had the highest value, of 90.40mm, and Geochang-gun had the lowest, of 46.69mm. The analysis results of the GIS-based water cycle system will be used to support the establishment of the effective rainwater management plan in Gyeongasngnam-do.
문병현,이택순,서정윤,서희정 ( Byung Hyun Moon,Taek Soon Lee,Jeoung Yoon Seo,Hee Jung Seo ) 한국물환경학회 1997 한국물환경학회지 Vol.13 No.3
This study was conducted to use waste oyster shell as biofilm media for biological wastewater treatment. The comparison between the activated sludge and the submerged biofilm process with oyster shell media (5% of reactor volume) for domestic sewage treatment was made at various hydraulic retention times. The effluent quality of the submerged oyster shell reactor was more stable than that of activated sludge reactor. The BOD removal efficiencies of the submerged process was above 80% at the various organic loading rates of 0.12∼0.55㎏BOD/㎥/day. The COD and SS removal efficiencies of the submerged process were higher than that of the activated sludge process. Also, TKN and T-P removal efficiencies of submerged process were higher than that of the activated sludge process. The comparison between the submerged biofilm process with oyster shell media of 10% and 18% was made at various loading rates. The hydraulic retention time was fixed to 6hr. The BOD, COD_(Cr) removal efficiencies of 10% and 18% were above 80% at organic loading rates of 1.0㎏ BOD/㎥/day and 1.5㎏COD_(Cr)/㎥/day but the removal efficiencies of 18% reactor decreased as the organic loading rates were increased. The TKN removal efficiencies of 10% and 18% were above 70% at organic loading rates of 0.2㎏ TKN/㎥/day. However, the removal efficiencies of 18% reactor decreased at the higher loading rates. The phosphorus removal efficiencies of both reactors showed similar removal efficiencies.
김은경,이택순,서정윤 ( Eun Kyoung Kim,Taek Soon Lee,Jeoung Yoon Seo ) 한국환경농학회 1996 한국환경농학회지 Vol.15 No.3
The Purpose of this study was to investigate the effect of the Change in the operating conditions on rotary turning compost plants. The major parameters investigated were moisture content and mixing of the sawdust and pig farm wastewater. Pig farm scale composting plants with mixing rotary were used in this study. Wastes used for the study were sawdust, pig manure, urine and wastewater. When the moisture content was 75%, the compost product obtained from the plants had better physical characteristics than that obtained from the plants with moisture contents of 70%, 80% and 85%.(two a day mixing). When the turning was twice a day, the compost product obtained from the plants had better characteristics than that obtained from non-mixing.(moisture content 75%). C/N ratio, pH value and coliform bacterial population were stable in the compost.
GIS 기반의 도시지역 침수 취약성 평가 - 창원시를 대상으로 -
송봉근 ( Bong Geun Song ),이택순 ( Taek Soon Lee ),박경훈 ( Kyung Hun Park ) 한국지리정보학회 2014 한국지리정보학회지 Vol.17 No.4
The purpose of this study is to evaluate flooding vulnerability considering spatial characteristics focused on Changwon-si, Gyeongsangnam-do. Assessment Factors are water cycle area ratio, surface runoff, and precipitation. And construction of assessment factors and vulnerability was analyzed by GIS program. Water cycle ratio and surface runoff were vulnerable in urban area. Precipitation was often distributed in agriculture of the northern region. Results of flooding vulnerability were low in agriculture and forest of the northern region. In contrast, urban area was high because there has covered impervious land cover. Analytical results of flooding vulnerability density using hotspot spatial cluster analysis were high in urban area. And these areas were situated in down stream so flooding were generated. Therefore, flooding vulnerability assessment of this study can help for selecting construction sites of pervious land cover and rainwater management facilities in urban and environmental planning.
한치복(Chi Bok Han),이택순(Taek Soon Lee) 大韓環境工學會 2010 대한환경공학회지 Vol.32 No.5
본 연구는 창원시 지역의 빗물의 계절적 수질변화와 저류조의 경과일수에 따른 수질 변화를 조사·연구하였다. 빗물의 계절적 수질 변화를 보면 전체적인 오염물질의 농도는 봄철 및 겨울철이 높았다. 내리는 빗물과 저류조 빗물의 수질을 비교 하였을 때 pH의 경우, 내리는 빗물은 pH 4.3, 저류조의 빗물은 pH 6.0을 나타내었고, 탁도의 경우는 1.82 NTU에서 14.61 NTU로 대략 8배 정도로 크게 증가하였다. 저류조의 경과 일수에 따른 수질 변화는 과망간산칼륨소비량이 초기 강우에서 먹는 물 수질기준을 초과하여 검출되었고, 증발잔류물은 초기우수에서 116mg/L 검출되었으나 저류시간 6일 경과 후부터 34일까지는 70~80mg/L로 저류시간이 길어져도 농도의 변화는 크지 않았다. This study investigated variation of rainwater quality by seasonal and storage duration of rainwater in Changwon city. Seasonally, the pollutants concentration of rainwater were higher in spring and winter. In the case of rainwater and storage rainwater quality, pH of rainwater was 4.3, storage rainwaters were 6.0 and Turbidity increased about 8 times from 1.82 NTU to 14.61 NTU. The changes of storage water quality during the storage period, initial KMnO₄ consumption rainwater was exceeded drinking water standard. Total solid in rainwater was detected as 116mg/L, it tended to stable at around 70∼80mg/L after storage period for a 6day.