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착유우의 톱밥발효우사 이용연구 제 1 보 : 낙농가의 톱밥발효우사 형태별 이용효과 비교
권두중,권응기,기광석,이기종,한정대,정석찬,강승원,강상열,정형섭,장학주,Kweon, Du-Jung,Kweon, Ung-Gi,Ki, Wang-Seok,Lee, Kee-Jong,Han, Jeong-Dae,Jung, Suk-Chan,Kang, Seung-Won,Kang, Sang-Lyol,Jung, Hyoung-Sup,Chang, Hak-Joo 한국축산환경학회 1995 축산시설환경학회지 Vol.1 No.1
This study was carried out to investigate the effect of sawdust bedding barn on manure handing, management labour and physiological aspect of dairy cows, and then to establish the criteria on the optimum utilization method of sawdust bedding barn. 46 tie stall barns and 49 sawdust bedding barns were surveyed to cmopare the milk productivity between two different barns, and also 5 tie stall barns, 15 sawdust bedding barns and 1 rice hull bedding barn were selected to study the utilization situation of sawdust barn in Kyung-Ki province area. The major results obtained were as follows; 1. The roof material of sawdust barn were consisted of 66% vinyl house, 23% PVC light and 11% slate and galvanum coated tin. Most of the floor structure was earth ground with the rate of the approximately 82%. 2. The average occupied area of sawdust bed per cow was 15.2 $m^2$, depth that 30 cm and the utilization period was 12 months. 3. Milk Yield was significantly higher at sawdust barn than at tie stall barn(P<0.01). Bacterial and somatic cell count in raw milk were less at the sawdust barn than in tie stall barn. However, there was not significance difference between two barns. 4. The labour hour needed to cow management in the sawdust barn was approximately 48% of that of tie stall barn. 5. The temperature and moisture content measured in sawdust bed were closely affected by seasonal ambient temperature. The skin and hair of cow were much cleaner at the PVC light roofed sawdust barn than any other roof materials. 6. The additives used for improving of fermentation did not show any effect on temperature and moisture content in sawdust bed. When the ambient temperature was $30.4^{\circ}C$, the surface temperature of measured 1 cm above the sawdust bed was $12.2^{\circ}C$ lower and the temperature of 100 cm above the sawdust bed was $2.4^{\circ}C lower under shading net facility than that of vinyl roofed one.7. The hoof length of miking cow was 7.95 cm in tie stall and 9.19 cm in sawdust barn with high significance (P<0.01). And disease occurence such as mastitis and foot-rot tended to decrease in the sawdust barn. 8. The number of total bacteria and coliform bacteria were less in the sawdust bed compared with earth ground resting area. And a parasite strongyloides papillosus was detected but without any infected cow. 9. The nitrate($NO_3N$) content in non-roofed earth ground resting area and earth ground under the sawdust bed was likely to pollute the ground water. 10. In economic point of view, rice hull bedding barn was the cheapest among different systems. And in the sawdust bedding barn PVC light + slate roofed barn was most desirable, and vinyl roofed one the least.
안송엽,권희태,김두정 圓光大學校 環境建設硏究所 2000 環境建設論文集 Vol.9 No.-
Process intensification without any increase in bed requires the exploitation of fluid mechanical phenomena as the basis for elegant solutions to the process engineering problems which result from the need to retain and control the immobilized biomass, and for biomass recovery. The fluidized bed bilogical reactor provides a solution to these needs. The wastewater treatment characteristics of the fluidized bed was filled with asnd media. Indirect aeration were studied experimentally. The optimal range of velocities was 1.17㎝/sec∼1.32㎝/sec, and under the BOD loading condition of 4.5㎏-BOD_5/m^3·d, the media concentration appeared to 18% and surface upflow velocity also 1.32㎝/sec for the maximum BOD removal. The media effluent unfiltered BOD_5 was 92%∼94%, at an HRT of 32 mintes.
안송엽 ( Ahn Song-yeob ),김용목 ( Kim Yong-mog ),권희태 ( Kweon Hee-tae ),김두정 ( Kim Du-jung ) 한국환경기술학회 2000 한국환경기술학회지 Vol.1 No.2
석가공폐수 처리는 처리 과정에서 약품응집제를 사용하고 있기 때문에 환경오염 및 생태계의 변화에 많은 문제점을 유발하고 있다. 본 연구에서는 경사분리기를 개발 제작하여, 석가공폐수처리에 대한 처리특성을 규명하고자 COD, SS, 탁도를 분석하였으며, 실험결과는 유입수량 0.3 ㎖/sec의 경우 회전속도 3500rpm에서 COD제거효율 86.92%~90.54%, SS제거효율 97.56%~98.53%이었고, 유입수량 0.4㎖/sec의 경우 회전속도 3500rpm에서 COD제거율효율 83.11%~89.46%, SS제거효율 96.33%~97.07%를 나타내었다. 탁도는 유출수에서 220~350NTU, 제거효율 98.24%~99.11%로 나타냈다. The present treatment system of stone wastewater cause various environmental pollutions in ecosystem due to the fact that it uses chemical coagulants in the treatment process. In this paper, we developed and manufactured the decanter and then analysed the removal retes of COD, SS and turbidity to reveal the treatment characters according to stone wastewater treatment. As a result experiment showed COD removal rete was 86.92%~ 90.54% and SS 97.56%~98.53% when the feed velocity was 0.3㎖/sec and rotational speed Was 3500rpm. On the other hand, It showed COD removal rate is 83.11%~89.46% and SS 96.33%~97.07% when the feed velocity was 0.4㎖/sec and rotational speed 3500rpm. Turbidity showed 220~350NTU, removal rate was 98.24%~99.11% in effluent water.
A New Malting Barley Variety with Early Maturity, Lodging Resistance, and Good Quality "Daeabori"
Jong Nae Hyun,Sang Ik Han,Dong Su Park,Jong Min Ko,Duck Yong Suh,Soon Jong Kweon,Sae Jung Suh,Du Chul Shin,Huhn Pal Moon 한국육종학회 2002 한국육종학회지 Vol.34 No.4
A new malting barley variety, 'Daeabori', was developed from cross between Jinkwangbori/Milyang 46 and Mihogolden, a good quality, by the barley breeding team in the National Yeongnam Agricultural Experiment Station(NYAES) in 2001. An elite line, YMB1503