최근 축산업은 육류 소비량 증가 및 정부의 장려 축산정책으로 발전하고 있으며 소규모 축산농가에서 집단화 및 대형화되어 고소득 향상 사업으로 변해가고 있다. 하지만 소득향상이라는 이점 외에 가축사육과정에서 배출되는 분뇨에 의해 각종 민원뿐만 아니라 인근 수계로의 노출로 인한 수질오염과 2차 토양오염, 가축전염병, 해충번식, 폐기물 등 가시적인 환경오염이 발생하고 있다. 따라서 정부는 가축분뇨의 체계적인 관리를 위해 “가축분뇨 관리 및 이용에 관한 법률”을 제정하여 시･군 지역의 가축분뇨관리세부계획을 수립하도록 하였다. 본 연구는 괴산군의 가축분뇨관리세부계획 수립을 위한 것으로 괴산군 지역의 가축사육 및 분뇨발생량 현황을 분석하였고 축종 및 사육두수 분포특성을 확인하기 위해 GIS(Geographic Information System)를 이용하여 분석하였다. ArcMap ver. 9.3을 사용하여 가축사육 주소지를 좌표 변환하였으며, 축종별 사육두수 범위별 분포현황을 조사하였다. 또한 최소자승법과 로그함수법으로 축종별 사육두수 및 가축분뇨 발생량을 예측하여 괴산군 가축분뇨관리세부계획 수립에 적용하고자 하였다.

Forest waste was interested as biomass to produce new renewable energy among various materials. To find appropriate conditions of the bio-ethanol production, acid hydrolysis and glucose fermentation experiments were conducted under various conditions. The acid-hydrolysis experiment results show that yield of glucose were increased as raise of temperature, acid concentration and reaction time. As a result, the optimal conditions for producing glucose from forest waste was under 110oC, 35%, and 100 min, respectively. The yield of glucose, which was generated from acid-hydrolysis experiment, was 2.419 mg/g·g from softwood and was 1.192 mg/g·g from hardwood. Also, it was investigated that acetic acid was more efficient than sulfuric acid for acid-hydrolysis process.

Suspended wood waste was being inflow into the dam and the problem of waste disposal has been occurred. In this study, ethanol production using woody floater wastes was performed to estimate value in use for raw material of renewable energy. To achieve the goal, experiments of acid hydrolysis and ethanol fermentation using dam woody floater as raw materials for bioethanol was carried out. In the results of field survey in the chungju dam, kind of woody floater was mainly Japanese larch (Larix leptolepis) and hybrid poplar (Populus tomentiglandulosa). The results of sugar extraction showed that sugar content was higher in Larix leptolepis than Populus tomentiglandulosa. Extracted sugar from wood waste was effective consumed by yeast(P. Stipitis and S cerevisiae). In the experiment consumption of sugar including glucose, galactose and xylose, the consumption rate of S. cerevisiae is faster than that of P. stipitis. and efficiency for ethanol production is higer in S. cerevisiae than P. stipitis. Also it can be confirmed that resource as ethanol production using wood waste was available.