• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 춘계학술대회 논문집
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• pp.430-433
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• 2009

The development of large-scale environmental friendly livestock complex in the reclaimed tideland is one of different alternatives to increase the competitiveness of internal livestock industry against an international opening markets as DDA and FTA in agricultural field. Recently, it is possible to introduce an environmental friendly livestock complex in the reclaimed tideland by an amendment of the acts for agricultural land. However more studies that are on the basis of nitrogen and phosphorus mass balance need to preserve the agricultural environments as the quality of agricultural water and soil in rural area. In this study, the reference for feasibility study is Whaong reclaimed tideland which located at Whaseong city, Gyeonggi Province, and a basic concept of environmental friendly livestock complex is the production of forage crops with the supply of liquid fertilizer and the production of bioenergy such as biogas by the recycling of pig slurry as a resource. The mass balance of nitrogen based on between forage crops such as maize, barley and liquid fertilizer supplied at the reclaimed tideland, and also it was estimated an economical efficiency as anaerobic digestion plant for treating pig slurry of $100m^3/day$ introduce in an environmental friendly livestock complex.

• Animal Bioscience
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• 제37권2_spc호
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• pp.360-369
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• 2024

Ruminal methane production functions as the main sink for metabolic hydrogen generated through rumen fermentation and is recognized as a considerable source of greenhouse gas emissions. Methane production is a complex trait affected by dry matter intake, feed composition, rumen microbiota and their fermentation, lactation stage, host genetics, and environmental factors. Various mitigation approaches have been proposed. Because individual ruminants exhibit different methane conversion efficiencies, the microbial characteristics of low-methane-emitting animals can be essential for successful rumen manipulation and environment-friendly methane mitigation. Several bacterial species, including Sharpea, uncharacterized Succinivibrionaceae, and certain Prevotella phylotypes have been listed as key players in low-methane-emitting sheep and cows. The functional characteristics of the unclassified bacteria remain unclear, as they are yet to be cultured. Here, we review ruminal methane production and mitigation strategies, focusing on rumen fermentation and the functional role of rumen microbiota, and describe the phylogenetic and physiological characteristics of a novel Prevotella species recently isolated from low methane-emitting and high propionate-producing cows. This review may help to provide a better understanding of the ruminal digestion process and rumen function to identify holistic and environmentally friendly methane mitigation approaches for sustainable ruminant production.

• 한국유기농업학회지
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• 제13권1호
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• pp.1-22
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• 2005

This study was focused on the system of regional resource circulation(RRC) of Asan-Si as a case region. So 301 farmers(members of producer organization) who are managing environmental-friendly agriculture (EFA) are surveyed. The RRC system is focused on establishing the system of regional complex farming connected with the seedling fanning and the livestock. The main results surveyed are as follows : First, total cultivated acreage is 574ha. Second, the total quantity of by-products of rices, beans, wheats is 983M/T. Third, the total quantity of nutrient requirement for seeding fanning is 85,335.6kg This research shows how to develop the RRC system for EFA. The development model and strategies are as follows : The first model for the system of regional resource circulation can be called the scenario of the best output for the system of environmentally friendly resource circulation. It is considered to estimate the appropriate number of heads of Korean cattle and hen which can be bred simultaneously. And the second model can be called the scenario of the regional allotment for the appropriate number of heads of those. It is considered to estimate the appropriate number of heads of those which can be alloted by the individual farm or area.

• 공업화학
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• 제34권3호
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• pp.291-298
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• 2023

본 연구는 가축분뇨를 가스화 하여 연료 가스를 생산하는 공정의 경제성과 탄소배출 관점에서의 지속가능성을 평가하였다. 본 연구에서 고려한 가스화 공정은 가스화 시설, 연료가스 정제 시설 및 생산 가스를 수요처를 수송하기 위한 파이프 라인의 설치까지 전체 시설을 고려하여 해당 기술의 현실적인 타당성을 평가하였다. 해당 연구는 실험 결과를 반영하는 ASPEN PLUS 시뮬레이션을 토대로 도출되었다. 경제성 및 CO₂ 전 주기 평가 결과, 축분 가스화를 통해 얻어진 연로가스는 발열량은 낮지만, 높은 수소 함량으로 천연가스와 가격적으로 경쟁력이 있다는 결과를 확인하였다. 특히, 탄소 배출 측면에서 높은 수소 함량으로 연료를 연소하였을 때 발열량당 배출되는 이산화탄소의 양이 천연가스에 비해 낮아 탄소 배출량 감축에 기여할 수 있다는 점을 확인하였다. 또한 다양한 시나리오 분석을 통해 외부 요인 및 정책적 요인에 따른 경제성을 확인하였고, 재무 재표 분석을 통해 해당 기술을 실질적인 사업화 가능성을 평가하였다.