• Journal of Biosystems Engineering
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• 제23권6호
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• pp.635-640
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• 1998

우리나라 양돈업의 가구당 사육두수는 1981년도에 4,300두에서 1996년도에 195,800두로서 약 46배가 늘어났으며, 500두 이상의 기업 양돈장은 1981년에 208호(0.05%)에 불과했지만 1996년 말 현재 3,671호(11.1%)이며, 이들에 대한 사육두수는 각각 370천두(20.2%)에서 4,448천두(68.3%)로 증가 하였다. 양계산업은 1981년에 가구당 68,400수에서 1996년 말 현재 441,800 수로서 약 6배 가 늘어났으며, 10,000수 이상을 사육하고 있는 농가수는 1981년에 0.1%에서 1996년 말에 1.5% 증가하였고, 이들이 사육하고 있는 사양두수는 14,058천수(32.7%)에서 72,339천수 (57.4%)로 급격히 증가하였다(정태영 등, 1997).(중략)

• Journal of Biosystems Engineering
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• 제22권4호
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• pp.451-458
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• 1997

In order to investigate the compost process and the evaporating phenomenon, a rotary reversing compost system has been tested in swine fm. In the summer season, the compost temperature were varied in the range of 50~$60^{\circ}C$ and the ash content has been increased to 12.8% showing in average of 24.7% at the end of phase. In the winter season, the compost temperature were varied in the range of 40~$57^{\circ}C$ and the ash content has been increased to 8.5% showing in the average of 18% at the end of phase. In summer the compost facility could handle all of the animal waste, but in winter it could not handle 1/4~1/3 of the animal excrement. The needed sawdust by this method could be reduced to 1/3 than that of the mixing method at the beginning of compost process.

• 기계저널
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• 제24권4호
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• pp.284-290
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• 1984

국내 쓰레기의 일인당 배출량은 외국보다 많은 2 kg/인. 일 정도이나, 주로 연탄재로 인한 것 이며, 발열량은 500 600 kcl/kg 으로 매우 낮아 보조연료가 필요한 수준이다. 따라서 소각로를 건설할 경우 이에 대한 발열량 증가를 위한 행정적인 조치 및 주민계몽의 노력을 기울여야 할 것이다. 국내의 쓰레기 처리방법은 거의 완전히 매립에 의존하고 있으나 외국의 경우는 소각, 매립 자원재활용, 퇴비화 등의 순으로 처리되고 있으므로 우리 나라도 이와 같은 추세를 따라야 할 것이며, 특히 자원재활용을 위한 "오레곤 병법"등과 같은 행정적인 조치는 우리 나라도 조속히 도입하여야 할 것이다. 소각로의 기술은 주로 유럽기술에 의해 지배되고 있으며, 최근 미국의 RDF 및 일본지역의 FBC 개발연구 등도 괄목할 만하다. 그러나 기본적으로, 유럽기술이라 할 지라도 국내 적용을 위해서는 기본적인 국내의 쓰레기 특성에 맞게 사양을 변경하여야 할 것이 므로 국내 실정에 맞는 소각로설계 연구를 추진해야 할 것이다. 특히 우리 나라는 외국보다 저발열량, 고수분 함량의 쓰레기이므로 이를 단순히 보조연료로만 처리하는 것보다 기술적으로 합리적인 보조연료 절감 방안을 강구하여야 할 것이다.하여야 할 것이다.

• 농촌계획
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• 제6권1호
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• pp.38-43
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• 2000

Composting toilet is accepted for environmentally sound and cost effective alternative of flushing toilet. In this paper, advantages of using composting toilet compared to flushing or pit toilet in terms of environmental quality were described. And principles of human waste decomposing processes within composting toilet were explained. The potential problems of adopting composting toilet to our rural area were also discussed. Treatment efficiency was tested on-site and results confirmed that the composting toilet could be used as alternative one in rural area.

• 한국유기농업학회지
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• 제9권3호
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• pp.93-101
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• 2001

This study was conducted to evaluate chemical parameters on butchery wastes as a bulking agent in composting of swine manure. Treatments included T1 : Swine manure + Rice hull, T2 ; Swine manure + Rice hull + Vermiculite, T3 ; Swine manure + Rice hull + Perlite, T4, Swine manure + Vermiculite, T5 : Swine manure + Vermiculite + Perlite, T6 ; Swine manure + Perlite, T7 ; Swine manure + lice hull + Vermiculite + Perlite. During the composting period, changes of temperature and pH were showed traditionally composting trend. Moisture, organic matter, total nitrogen and C/N ratio were higher rice hull than vermiculite and perlite treatments. Ammonia-N and EC were not differences among the treatments. In heave metal, Cd and Cr were showed higher in vermiculite treatments than other treatments. Rice hull treatments were decreased volatile fatty acids compared to that of other treatments. In conclusion, rite hull containing high organic content was greater composting effects than vermiculite and perlite containing low organic content.

• 한국농공학회지
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• 제43권5호
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• pp.145-152
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• 2001

농촌유역하천에서 수집된 수질측정자료를 이용하여 주요 오염원을 규명하였다. 분석에 이용된 수질항목은 BOD, COD. EC, pH. TN, TP,$NO_3-N,PO_4-P$ 등으로서 하천 본류내 구간별로 쌍대비교를 통해서 항목별 차이에 대한 유의성 검정을 하였다. 유의성 검정에 이용된 방법은 쌍대비교를 위한 비모수검정법인 Wilcoxon 순위검정법을 이용하였다. 검정결과, 유기성 오염물질의 지표로 이용되는 BOD와 COD가 상승하는 구간은 주로 생활하수가 유입되는 구간으로 나타났다. 인구밀도가 매우 높으나 생활하수가 처리장으로 배제되는 지역의 하천구간에서는 이들 농도변화는 없었다. 유역 내 축산농가가 밀집되어 있는 지역의 하천구간에서도 농도의 변화 또한 존재하지 않았다. 본 연구에서 조사된 유역에서와 같이 축산분뇨를 퇴비화 및 농지환원하는 경우에는 하천수질에 거의 영향을 미치지 않는다는 것을 알 수 있었다. 따라서 농촌지역의 하천 수질을 개선하기 위해서는 생활하수에 대한 처리가 선행되어야 한다.

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2005년도 춘계학술발표논문집
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• pp.306-308
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• 2005

염분농도에 따른 발아특성은 쪽제비싸리, Perennial ryegrass의 경우 $0.4\%$ 이상 NaCl 농도에서 발아율과 유아 및 유근 길이가 급격히 감소하였으며, Creeping red fescue는 $0.2\%$ 이상 NaCl 농도에서 매우 급격한 생육저하가 일어났다. 외래초종의 초장 분석결과 Mixture III> Mixture IV> Mixture II> Mixture I의 순이었고, 재래 초$\cdot$목본의 경우는 외래초종의 초장이 길수록 길이가 짧아지는 경향을 나타냈으며, Mixture I> Mixture II> Mixture IV> Mixture III의 순이었다.

• 한국축산시설환경학회지
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• 제5권1호
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• pp.45-52
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• 1999

The purpose of this study is to provide information for the livestock for the livestock carcass composting operation in agricultural waste management. Burial, landfilling and incineration of livestock carcass may have environmental regulatory and economic liabilities. Dead animals amended with agricultural residues can be composted and used to promote soil fertility and reduce environmental pollution. In this study we evaluated the effect of amendments on the primary and secondary composting reaction and stability of compost. The full-scale composting bin of swine carcass in roofed system with three amendments was adequate in reaching sufficient temperature above 55$^{\circ}C$ long enough to kill the pathogen. The average temperature of the compost material in dead swine amended with corn stover increased rapidly to 64$^{\circ}C$ on the 2nd day after primary composting and dropped to near ambient temperature on the 140th day of composting. The composting with of corn stover and wheat straw are more efficient for swine carcass composting than that of sawdust. Therefore, the amendment property is an important factor in the design of composting facility.

• 한국농공학회:학술대회논문집
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• 한국농공학회 1999년도 Proceedings of the 1999 Annual Conference The Korean Society of Agricutural Engineers
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• pp.405-410
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• 1999

This study was performed to find the recycling performance and to provide design data during recycle solid composting system to reduce bulking agent cost, Dairy manure amended with rice hulls and recycled compost was composted in a laboratory -scale vessel by continuous aeration for 10 days. The temperature and ammonia emission variations according to the ratios of bulking agents during the primary aeration stage were surveyed. Also, the influence of fresh compost quality on the recycling performance were anlayzed. While recycled composting system were operatured. The temperature in compost was maintained in the range of 40∼60$^{\circ}C$ needed for biodegradation and death of pathogenic organisms, but the ammonia emission was different by the ratios of recycled compost. The ammonia emission increased due to the low C/N ratio(17.6), high pH value(8.1) of the recycled compost.

• 아시안잔디학회지
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• 제12권1호
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• pp.17-22
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• 1998

This experiment was conducted to investigate the active composting process with wastes from agricultural products. This was decomposed by active composting process for 28 days. Temperature of active airation period was maintained at 60~68C˚ for 6 days, and then 55˚C ~40˚C for 11 days. After turnover, composting temperture raised to 55~58˚C for 5 days and was maintained at air temperature condition from 6 days. Add then, compost was stabilized in the non-aerated depository for 2 months. The C/N ratios of these compests were 18.5,19.7 and 18.5 on the depths which were 5 cm, 10 cm and 20 cm, respectively. The pH of compest was changed from 6.5 to 7.2. Key words: Agricultural products, Wastes, C /N ratios.