• 두엄누리회보
• /
• 통권25호
• /
• pp.1-4
• /
• 2005

환경부$\cdot$농림부 공동, 가축분뇨의 관리 및 이용에 관한 법률 제정추진 - 농림분야 제도개선 건의

• 한국환경과학회지
• /
• 제28권1호
• /
• pp.37-54
• /
• 2019

The groundwater quality through livestock excreta survey based on "Act of the management and use of livestock excreta" was investigated by selecting sampling sites within 1 km of the farmland without considering hydrogeological units. However, these sites can be affected by various pollution sources such as chemical fertilizers and livestock excretions. Additionally, the effects of pollution sources on groundwater quality in the sites cannot be clearly distinguished from naturally occurring backgrounds. In this study, a method was developed to select the sampling sites for groundwater quality through livestock excreta survey in order to understand the effects of pollution sources especially livestock excreta. First, the concentrations of nitrate within the radius of 200 m, 300 m, 500 m and 750 m, respectively, from the farms regarded as pollution sources in hydrogeological units were compared in 2016-2017. All the nitrate concentrations at 200 - 500 m from the farms exceeded a background concentration, 13.3 mg/L. Those at 750 m and the background concentrations measured by the Ministry of Environment were comparable. Therefore, the appropriate radius was suggested as 500 m for livestock excretions survey. In this study, the areas within 500 m from the farms could be considered under the influence of livestock excretions, while those beyond 500 from the pollution sources as background in hydrogeological units. The developed method was validated by applying it to the sites selected based on both administrative divisions and watersheds for livestock excretion survey. The average densities for the developed method were 0.82 and 0.39 points/km2, respectively, which were considered as appropriate levels according to those of the European Environmental Agency.

• 한국환경과학회지
• /
• 제28권4호
• /
• pp.413-422
• /
• 2019

The objective of this study was to estimate the trends of air quality in the study area by analyzing monthly and seasonal concentration trends obtained from sampled data. To this aim, the mass concentrations of $PM_{2.5}$ in the air were analyzed, as well as those of metals, ions, and total carbon within the $PM_{2.5}$. The mean concentration of $PM_{2.5}$ was $22.7{\mu}g/m^3$. The mass composition of $PM_{2.5}$ was as follows: 31.1% of ionic species, 2.2% of metallic species, and 26.7% of carbonic species (EC and OC). Ionic species, especially sulfate, ammonium, and nitrate, were the most abundant in the $PM_{2.5}$ and exhibited a high correlation coefficient with the mass concentration of $PM_{2.5}$. Seasonal variations of $PM_{2.5}$ showed a similar pattern to those of ionic and metallic species, with high concentrations during winter and spring. $PM_{2.5}$ also had a high correlation with the ionic species $NO_3{^-}$ and $NH_4{^+}$. In addition, $NH_4{^+}$ was highly correlated with $NO_3{^-}$. Through factor analysis, we identified four controlling factors, and determined the pollution sources using the United States Environmental Protection Agency(U.S. EPA) pollution profile. The first factor, accounting for 19.1% of $PM_{2.5}$ was attributed to motor vehicles and heating-related sources: the second factor indicated industry-related sources and secondary particles, and the other factors indicated soil, industry-related and marine sources. However, the pollution profile used in this study may be somewhat different from the actual situation in Korea, since it was obtained from US EPA. Therefore, to more accurately estimate the pollutants present in the air, a pollution profile for Korea should be produced.

• 한국수소및신에너지학회논문집
• /
• 제30권2호
• /
• pp.103-110
• /
• 2019

Cu-Zn-Al catalysts were prepared via co-precipitation method for low-temperature water-gas shift (LT-WGS) reaction under practical reaction condition. Aging time was systematically changed to find optimum point for LT-WGS under practical condition. The Cu-Zn-Al catalyst aged for 72 hours showed the highest CO conversion within low-temperature range as well as very stable catalytic activity for 200 hours despite the practical reaction condition.

• 한국조명전기설비학회:학술대회논문집
• /
• 한국조명전기설비학회 2002년도 학술대회논문집
• /
• pp.37-43
• /
• 2002

원점(초점)에 놓인 광원(점광원)으로부터 방사된 ray들을 광축과 평행하게 진행하도록 그 진로의 방향을 바꾸어주는 것이 대형등명기의 광학부(중심렌즈부, 굴절링부, 절사프리즘부) 역할이다. 그래서 광학부에 대한 정밀한 설계가 이루어져야 하지만, 기존의 광학부 설계법은 어떤 설계 조건과 제작환경에 맞지 않는다. 따라서 본 논문에서는 Ray Tracing과 배광예측 프로그램인 Photopia 시뮬레이션을 통해 그 설계의 문제점을 찾고, 설계조건과 제작환경에 맞는 최적의 설계가 되도록 개선안을 제시하고 설계법을 도출하였다. 단, 초점에 위치한 광원은 모두 점광원으로 하였다.

• 월간낙농육우
• /
• 제35권12호
• /
• pp.92-118
• /
• 2015

농림축산식품부는 지난 11월 11일 "무허가 축사 개선 세부실시요령"을 지방자치단체에 전달하고, 이에 대한 교육을 순차적으로 실시하기로 했다. 농림축산식품부, 국토교통부, 환경부가 합동으로 만든 "무허가 축사 개선 세부실시요령"에는 올해 3월 25일에 개정된 "가축분뇨법 시행령 및 시행규칙"을 보완하는 내용이 담겼다. 농림축산식품부는 2018년 3월까지 무허가 축사를 적법화 할 계획이다. 이번 호에서는 무허가 축사 개선 세부실시요령 중 낙농육우 부문에 해당되는 내용을 발췌했다. 목장마다 무허가 축사 보유 실태가 다른 만큼 꼼꼼히 살펴보고 도움을 받는 것이 좋겠다. 보다 자세한 사항은 농림축산식품부나 시군 축산담당과에 문의하면 안내받을 수 있다.

• 한국작물학회:학술대회논문집
• /
• 한국작물학회 2020년도 추계학술대회
• /
• pp.118-118
• /
• 2020

• 한국환경생태학회지
• /
• 제14권4호
• /
• pp.280-286
• /
• 2001

계룡산국립공원 지역의 등산로 주연부식생 구조 및 훼손실태를 파악하기 위하여 10개 등산로를 대상으로 2000년 8월에 조사한 결과는 다음과 같다. 등산로 주연부식생의 수종으로는국수나무, 조록싸리, 조릿대 등이었다. 등산로 주연부의 종다양도, 개체수는 이용강도와 상관관계가 없었으며, 이용강도와 하층피도는 대체적으로 상관성이 있는 것으로 나타났다. 등산로 전 구간에서 우세하게 출현한 수종은 국수나무이었으며, 대체적으로 능선부 등산로 주연부식생과 사면부에 위치한 등산로 주연부식생간 종구성이 이질적인 것으로 나타났다. 입지환경에 따른 등산로 주연부 수종의 차이는 작은 편이다. 등산로 주연부의 식생피도는 북사면, 서사면, 동사면, 남사면 순으로 높게 나타났다.

• 한국물환경학회지
• /
• 제39권5호
• /
• pp.390-395
• /
• 2023

The feasibility of applying the shortcut nitrogen removal process to treat livestock wastewater on individual farms was examined, and appropriate operating parameters were established. As a result,, it was determined that the nitrification reaction was carried out under 550 mg/L of ammonium nitrogen concentration, but it was less effective under conditions of high ammonia concentration. Consequently, it was confirmed that a partial injection of inflow water was necessary to minimize the effects of ammonia toxicity. Following the sequential batch reactor (SBR) operation results, it was difficult to achieve the effluent quality standard without an external carbon source. Also, selection of the appropriate hydraulic retention time was critical for the optimal SBR operation. Following the livestock farm application, with external carbon source injecting, the total nitrogen concentration in the effluent was 85.1 mg/L. This result revealed that the standard could be accomplished through a single treatment on individual livestock farms. The ratio of nitrite nitrogen to ammonia nitrogen in the effluent was verified to be suitable for implementing the anammox process with a 10 days of hydraulic retention time. This study demonstrated the potential applicability of process in the future. However, in order to apply to livestock farms, managing variations in wastewater load across individual farms and addressing reduced nitrogen oxidation efficiency during the winter season are crucial.

• 가정과삶의질연구
• /
• 제13권2호
• /
• pp.35-44
• /
• 1995

본연구의 목적은 아동의 환경의식과 처분행동을 조사하여 환경문제에 대한 아동의 역할을 조명하고 조기환경교육의 기초자료를 제공하는데 있다 조사도구는 질문지를 이용하 였고 분석방법은 SAS통계프로그램을 이용하였다 환경의시과 처분행동의 차이는 ANOVA와 Tukey test를 지역간(도시, 농촌)의 차이는 t-test 와 $\chi$2 검정을 사용하였다 분석에 이용된 자료는 도시 311부 농촌 299부로 총 610부였다 본연구의 결과를 요약하면 다음과 같다 1) 도시와 농촌간의 환경의식은 통계적으로 유의한 차이가 없이 모두 높게 나타났다 2) 인구통 계변수에 따른 환경의식은 생활수준과어머니의 교육수준이 높을수록 높았으며 주거형태별로 는 아파트 거주자가 높게 나타났다 3) 도시와 농촌간의 처분행동은 유의적인 차이를 보였는 데 도시 지역이 높게 나타났다 4) 인구통계변수에 따른 처분행동은 환경의식과 마찬가지로 소득과 어머니의 교육수준이 높을수록 높았으며 아파트 거주자와 종교가 있느 아동이 높게 나타났다 이러한 결과는 환경을 고려하는 행동양식의선행변수가 교육임을 재확인해주었다