토지용도와 유역특성을 고려한 비점오염물질 원단위 산정에 관한 연구

신은성(Eun Sung Shin),최지용(Ji Yong Choi),이동훈(Dong Hoon Lee) 한국물환경학회 2001 한국물환경학회지 Vol.17 No.2

For issues of integrated water quality management, a thorough investigation on both point source and non-point source of pollution loaded from streamlets to rivers should be conducted. Also, it is necessary to investigate the relationship between land use, pollutant discharge from non-point sources, and the unit load and its contribution to total pollution loadings. The objectives of this study is to estimate the unit load by land use and livestock breeding level in order to promote effective management of the non-point source of pollution in rural areas. The watershed under investigation consists of eleven sub-basins(smaller than 500ha) located in Chunchon city in Kangwon Province. Flow and quality parameters, such as biochemical oxygen demand(BOD), chemical oxygen demand(COD), suspended solids(SS), total nitrogen(T-N), and total phosphorous(T-P), are determined. The results are summarized below: 1. Annual runoff loading of SS. BOD, COD, T-P, and T-N were estimated to be 423.4, 20.0, 56.6, 2.6, 20.9㎏/ha.yr respectively. 2. Runoff loadings by landuse appeared to have following relationship. ·COD : L(㎏/yr) = 187.3 × Paddy + 110.1 × Field + 24.3 × Moun. (R² = 0.92) ·T-N : L(㎏/yr) = 77.8 × Paddy + 26.1 × Field + 11.1 × Moun. (R² = 0.96) ·T-P : L(㎏/yr) = 14.8 × Paddy + 4.3 × Field + 0.3 × Moun. (R² = 0.96) 3. Considering livestock breeding level, the runoff loading by land use were observed as below: ·COD : L(㎏/yr) = 173.6×Paddy+63.0×Field+24.8×Moun.+14.7LU(R² = 0.93) ·T-N : L(㎏/yr) = 74.3×Paddy+l4.0×Field+11.2×Moun. + 3.8LU(R² = 0.97) ·T-P : L(㎏/yr) = 7.7×Paddy+ 4.2×Field+ 0.3×Moun. + 0.3LU(R² = 0.98)

농업지역의 비점오염물질 유출특성에 관한 연구

신은성(Eun Sung Shin),최지용(Ji Yong Choi),이동훈(Dong Hoon Lee) 한국물환경학회 2001 한국물환경학회지 Vol.17 No.3

The principal non-point sources of water pollution from agriculture has been known as nutrients, organic matters, sediments, fertilizer and toxic chemicals. Among all of these pollutants, nutrients give a significant impact on water quality, such as eutrophication. For issues of integrated water quality management, a thorough investigation on both point source and non-point source of pollution loaded from streamlets to rivers should be conducted. Therefore, it is necessary to investigate the relationship between land use, pollutant discharge from non-point sources, and the unit load and its contribution to total pollution loadings. The objectives of this study is to investigate the surface runoff characteristics of agricultural pollutants from non-point sources by land use in order to promote effective management of the non-point source of pollution in rural areas. The watershed under investigation consists of eleven basins(smaller than 500ha)located in Chunchon city in Kangwon Province. Flow and quality parameters, such as biochemical oxygen demand(BOD), chemical oxygen demand(COD), suspended solids(SS), total nitrogen(T-N), and total phosphorous are summarized below : 1. Slower runoff flow was observed in rural areas than areas of built-up(urban areas). Peak SS and T-P concentrations were observed prior to the flow. T-N was decreased as flow increased due to high ratio of NO₃-N. 2. The concentration graph of SS and T-P, and flow was appeared to be a clock-wise hook-shape curve. The maximum concentration was observed on the point of maximum flow. However, the concentration of T-N showed on opposite curve to the graph above.

하천수질관리를 위한 종합수질지표의 개발과 적용

최지용,신은성 ( Ji Yong Choi,Eun Sung Shin ) 한국물환경학회 1997 한국물환경학회지 Vol.13 No.4

To assist in the dissemination of water quality information to expert as well as layman, Korea Water Quality Index(K-WQI) has been developed. The K-WQI is based on ten physico-chemical and biological determinants which were adopted by an intensive interview and questionnaire survey, and a review of water quality criteria. The sub-index is developed by use of both opinion research and mathematical techniques. The former involves the completion of a series of questionnaires by a panel of water experts thus facilitating the objective selection, transformation and weighting of determinants. The latter involves the use of regression for the construction of the sub-index functions. Aggregation for sub-index is used weighted product function. The weighted product, when applied to decreasing scale subindices, does not exhibit eclipsing. Application of the K-WQI to water quality data, drawn from a selection of Korean river reaches typifying a range of river qualities, has shown that the Index not only act as indicators of water quality change, but can also indicate the effects of these changes on potential water use.

사회통합적 관점에서 본 탈북자정책에 관한 연구

송은희 ( Eun Hee Song ),신은성 ( Eun Sung Shin ) 한국외국어대학교 글로벌정치연구소 2012 글로벌정치연구 Vol.5 No.2

식물성 대체육의 안전성 검증을 위한 위해요소 모니터링

마아영,신은성,손선아,신태선,정현정,Ayeong Ma,Eun Sung Shin,Seon-A Son,Tai-Sun Shin,Hyun-Jung Chung 한국식품위생안전성학회 2024 한국식품위생안전성학회지 Vol.39 No.2

국내에서 제조되어 유통되는 식물성 대체육을 대상으로 일반성분(수분, 단백질, 지방), 지방의 산패도, 지방산의 조성, 아플라톡신, 중금속 함량을 분석하였다. 그 결과 한번 익힌 후 건조된 형태의 식물성 대체육보다 익히지 않고 수분이나 지방에 의해 성형과정을 거친 냉동제품에서 상대적으로 많은 양의 지방을 함유하고 있음을 확인할 수 있었다. 조지방 함량이 1 g을 넘는 시료를 대상으로 지방의 산패도(산가, 과산화물가)를 측정했다. 그 결과 일부 시료에서 높은 산가 및 과산화물가가 측정되었으나 식품공전상에 대체육에 대한 정확한 분류가 되어있지 않아 산패도에 대한 안전성을 판단하기 위한 규격이 필요해 보인다. 가스크로마토그래피를 사용하여 지방산 조성을 분석한 결과 대부분은 불포화지방산이 차지하고 있지만, 일부 포화지방산의 함량이 높은 시료가 있었다. 포화지방산 및 불포화지방산의 함량이 높은 식물성 대체육을 식물성 유지를 사용하여 가열조리를 거쳐 섭취하게 된다면, 많은 양의 지방을 섭취하게 될 수 있음을 예측할 수 있다. 또 가스크로마토그래피를 사용한 지방산 분석법을 통해 식물성대체육에 동물 유래 지질이 함유되어있지 않음을 확인할 수 있었다. 이는 이후에 식물성 대체육에 대한 영양표시성분 및 실제성분의 대조 시에 활용될 수 있음을 시사한다. 식물성 대체육에 대하여 아플라톡신을 분석한 결과 현재 식품공전에 제시된 농산물 중 아플라톡신 기준규격에 대하여 적합인 수준이나 미량 검출되는 것을 확인하였다. 중금속의 분석 결과 모두 불검출이었으나 환경요인 및 원재료에 따라 중금속의 오염이 의심될 시에 중금속 분석을 진행할 수 있을 것으로 판단된다. 이러한 실험결과를 통해 국내에 유통되고 있는 일부 식물성 대체육에 대한 안전성을 확인하였으나 산가, 과산화물가, 아플라톡신, 중금속은 대체육에 대하여 구체적인 분류 및 적합 규격이 마련되어 있지 않아 적합 판정시에 비슷한 성향을 가진 식품군에 대조하여 판단해야 하는 어려움이 있었다. 따라서 기존의 기준에 대하여 검토 또는 변경을 거쳐 식물성대체육에 대한 관리기준이 설정한다면 유사한 식품군의 건전성 및 적합성을 유지하는 것에 도움이 될 것으로 판단된다. The proportion of plant-based meat alternative (PBMA) consumers has recently increased in Korea. This is due to several reasons including protecting the environment, satisfying preferences, maintaining health, and improving eating habits. Accordingly, many companies produce and sell alternative meat using various materials. Alternative meats are classified into plant (such as soybeans and wheat), seaweed, insect, and cultured meats, depending on the raw materials used in manufacturing. PBMA is sold after undergoing processes such as grinding, seasoning, and molding. Therefore, monitoring the presence of any hazardous elements during this process is essential. Accordingly, in this study, we analyzed the harmful components of nine domestically distributed PBMA that are most easily accessible to consumers. After extracting fat from the samples and analyzing the rancidity level, samples F, G, and I were highly rancid. Trace amounts of aflatoxin were detected in samples A and B, but confirmed to be within the range. Cd and Pb were not detected in any sample. We hope that this study will help establish methods to ensure the safety of domestically sold PBMA.

서울 도시지역의 비점오염원 유출특성에 관한 연구

최지용(Ji Yong Choi),신은성(Eun Sung Shin),이동훈(Dong Hoon Lee) 한국물환경학회 1999 한국물환경학회지 Vol.15 No.3

Urban areas contribute the highest nan-point source pollutant loading per unit area and not only customary pollutants but hazardous materials as well, thus urban areas have a great impact on water quality. In this paper, in order to estimate the urban non-point source pollutant loading in the Han River watershed, the Kuui and the Noryangjin basins were selected as representative spots and equipped with the water quality automatic monitoring system. These basins are located in the up and down stream of the urban area (Seoul). In this study, analysis on non-point source pollutant loading in regards to precipitation, runoff and water duality were investigated COD and SS parameters were selected to calculate unit loading data because these entities have a close relationship with non-point source pollution The results revealed that annual non-point source pollutant COD loading was 2,004 tons/yr, which is approximately 15% of the total COD loading of 13,874 tons/yr and annual non-point source pollutant SS loading was 29,631 tons/yr, which is 28% of the total SS loading of 75,285 tons/yr.

高濃度 有棄性 廢棄物의 營養鹽類 除去工程에 關한 硏究 : 糞尿를 中心으로

申恩聲,金容珍,鄭炅鎭,李東勳 서울시립대학교 산업기술연구소 1994 산업기술연구소논문집 Vol.2 No.-

A2/O process was adapted to investigate the feasibility of nutrient removal, i.e, nitrogen and phosphorus from nightsoil and to obtain the optimum operation parameters for nightsoil treatement in laboratory. The results of this study were as follows. 1) A2/O process could be applied to nutrient control from nightsoil. 2) The removal efficiencies of substrates and nutrients were increased as internal recycle rate was increased. The optimum rate of internal recycle was 300%. 3) The removal efficiencies of substrates and nutrients were decreased as organic loading was increased. The optimum F/M ratio was 0.2 ~ 0.3kg·BOD5/kg·MLVSS·d. 4) In the optimum conditions, which were 300% of internal recycle, 100% of sludge recycle rate and 0.2 - 0.3kg·BOD5/kg·MLVSS·d of F/H ratio the removal efficiencies of TBOD, TCOD, SS, T-N, and T-P were 98.6%, 93.8%, 98.3%, 83.4%, and 53.6%, respectively.