• 제목, 요약, 키워드: possible utilization of slurry

검색결과 4건 처리시간 0.039초

Minimizing the Environmental Pollution of Pig Husbandry and Waste Management

  • Mszros, Gy;Kuli, B.;Fenyvesi, L.;Mtys, L.
    • 한국농업기계학회:학술대회논문집
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    • pp.1395-1404
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    • 1993
  • Application of water-saving self-feeders can reduce water consumption of pigs by more than 50% . so the feeding-watering system one of the most important way of the reduction of the slurry. Bioactive deep litter housing can eliminate slurry. Matured urine, faeces and litter can use for the purposes of soil conditioning and fertilizing . Water-saving slurry handling technology can halve manure dilution so it can double the nutrient content of the slurry. By using of straw bale biofilter for reducing emissions of pig houses makes fattening of pigs possible close to populated area. Developed rate control system for slurry application make avoiding over-fertilization possible , can fulfill better the demand of nutrient of plants. By means of computer aided manure utilization system area distribution of soil characteristics can determinate . The system is suitable for planning the utilization of manure and slurry in environment -friendly way.

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가축분뇨 자원화를 위한 이용실태 분석 (The Possible Utilization of Animal Excrements)

  • 유덕기
    • 한국유기농업학회지
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    • v.10 no.2
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    • pp.1-28
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    • 2002
  • Regarding the dangers to soil, water and air, which come from current agricultural application measures for nitrogen, a sectoral approach for a non-polluting liquid manure utilization cannot be used any longer. Slurry was not any longer considered as a tiresome waste produced of animal husbandry, but as a valuable fertilizer. The goal of the largest possible utilization of slurry on the farm was and still is in the foreground, An Integrated system approach has to be found. leading to a drastic improvement of nutrient utilization and hence to a considerably reduced nutrient use. This can only be expected, if the organic manure can be applicated at times, when losses through leaching and volatilization can be minimized. The necessary investments for such concepts can clearly be reduced through cooperation.

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Geotechnical Applications of Industrial By-products for Reducing Environmental Impacts - ln the Case of Pulverized Coal Fly Ashes -

  • Kazuya Yasuhara;Sumio Horiuchi;Hideo Komine
    • 한국지반공학회:학술대회논문집
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    • pp.29-62
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    • 2001
  • Based on the results from investigation of behaviour of pulverized fly ashes (PFA) at laboratory and field, the way how to reduce the environmental impacts to geotechnical practices Is considered and described. In order to reduce discharged industrial by-products, it should primarily be emphasized that an effort are made as much as possible not to put into homing. Secondarily, an effort must be made to increase amount of utilization to geotechnical engineering practices. In addition, from an environmental point of view, we should challenge to create innovative materials which are eligible for controlling other wastes and remedying contamination m soils by using industrial byproducts which belong to wastes This Is a new concept in which the polluting materials can be eliminated by making use of wastes. Based on the above-stated concept, the previous and possible utilization of PFA is classified into: (1 ) reclamation, embankment or backfill material, (2) light weight geo-material, (8) soil stabilization/improvement, and (4) environmental material. The reason why PFA, in particular, slurry PFA has been used and will possibly be used more widely is due to the fact that PFA has the advantages : (i) low specific gravity leading to a light weight geomaterial, (ii) high pozzolanic activity enhancing strength, especially due to cement addition, and (iii) spherical shape of particles producing isotropy and then pumpability. As well as the concept of reducing geo-environmental impacts, the present text mainly describes the successful results at laboratory and field which have been obtained by the authors. The most important issue hi application of byproducts including PFA for geotechnical practices is to prevent leakage of polluted substances from sedimentary deposits, ground and earth structures. As one of possible techniques far achieving this purpose, a method of washing off the polluted substances by hot water is described.

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고농도 수산화칼슘 수용액으로부터 초미립 경질 탄산칼슘 분말의 합성 (Synthesis of ultrafine calcium carbonate powders from high concentrated calcium hydroxide solution)

  • 안지환;박찬훈;김정효;이종국;김환
    • 한국결정성장학회지
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    • v.6 no.4
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    • pp.509-520
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    • 1996
  • 탄산가스로 채워진 반응기에 현탁액을 분사시키는 방법(분사법)으로 탄산칼슘 분말을 제조한 결과, 현탁액의 pH 및 칼슘이온의 농도가 반응초기 일정기간 높게 유지되는 조건에서만 잘 분산된 $0.05~0.1\;\mu\textrm{m}$ 크기의 초미립 칼사이트 상 탄산칼슘 분말이 제조되었다. 반응 초기 현탁액의 pH 및 칼슘이온의 농도가 일정기간 높게 유지시키기 위하여 현탁액의 순환방식과 탄산가스 공급방식을 변환시켜 제어할 결과 그간 분사법으로 미립자의 탄산칼슘 분말 합성이 어려웠던 1 wt% 이하의 수산화칼슘 농도 영역과 고농도 현탁액 영역인 5 wt% 수산화칼슘 농도 영역에서 $0.02\;\mu\textrm{m}$ 크기의 초미립자 탄산칼슘 분말을 얻을 수 있었다.

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