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in vitro system 에서 Antibiotics 의 첨가가 반추위내 Carbohydrate 발효 및 Gas 생성에 미치는 영향
안정제(J . J . Ahn),김인원(I . W . Kim),맹원재(W . J . Maeng) 한국축산학회 1991 한국축산학회지 Vol.33 No.10
The effects of antibiotics and chloroform on the fermentation rates of carbohydrate and gas yield in the rumen were studied. One hundred ㎖ of rumen inoculum with 100㎖culture medium in a 250-㎖ serum bottle was incubated for 0, 2, 4 and 8hr. Forty ppm of Avoparcin. Thiopeptin and chloroform were added to each bottle at zero time. Twenty-㎖ samples taken from each incubation bottles were prepared and measured for glucose, VFA and lactate. Fermentation rates of carbohydrates were calculated in this experiment and gas yields for 5 days were also measured in the treatments added with 40 and 20 ppm antibiotics. Fermentation rate of carbohydrate was 38.5%/hr without additives, however, addition of antibiotics decreased the rate to 20.9-35.4%/hr. The lowest fermentation rate was recorded with addition of avoparcin followed by thiopeptin, monensin and chloroform. Total VFA was not affected by addition of antibiotics. Y_ATP Was also reduced considerably with the addition of antibiotics from 24.1 with control to 14.4-19.9 with additives. Average gas yields for 5 days were 84.7, 67.7, 69.3, 73.3 and 60.4 cc/100 ㎖. for control, avoparcin, thiopeptin, monensin and chloroform, respectively.
In Vitro system 에서 Antibiotics 의 첨가가 반추위내 반추위미생물 성장과 단백질 분해에 미치는 영향
안정제(J . J . Ahn),김인원(I . W . Kim),맹원재(W . J . Maeng) 한국축산학회 1991 한국축산학회지 Vol.33 No.10
The effects of antibiotics and Chloroform on the fermentation rates of protein in the rumen and efficiency of rumen microbial growth yield were studied. One hundred ml of rumen inoculum with 100㎖ culture medium in a 250-㎖ serum bottle was incubated for 0, 2, 4 and 8hr. Forty ppm of Avoparcin, Thiopeptin and chloroform were added to each bottle at zero time. Twenty-㎖ samples taken from each incubation bottles were transferred to 50-㎖ centrifuge tubes for the preparation of washed cell suspension. Microbial-N, cell density and NH₃-N production were determined Degradation rates of trypticase and the Y_ATP with or without antibiotics were also calculated. All antibiotics added to rumen inoculum in this study inhibited microbial-N yield as compared with control. Microbial growth rate and the Y_ATP were also decreased considerably with addition of antibiotics. Degradation rates of trypticase were also inhibited from 5.9%/hr control to 3.1-4.0%/hr with the addition of antibiotics. Thus. antibiotics, the rumen additives to rumen inoculum in this study may have interfered with ruminal digestion of protein and growth of rumen microbes.
돼지분뇨 처리를 위한 Farm-scale Two-phase Anaerobic Digester의 실증운영에 관한 연구
백인규,이상락,안정제,권윤정,맹원재 한국축산환경학회 2000 축산시설환경학회지 Vol.6 No.2
A two-phase anaerobic digestion system for the treatment of swine waste was constructed in a commercial hog farm. The digester system was composed of 4 major units; slurry storage pit, acidogenic digester, methanogenic digester and sedimentation pit. A biogas boiler unit was also attached to maintain the digester temperature of 37$^{\circ}C$. Substrate lading was made with 2hr-interval by pumping about 2.1$m^3$ of slurry type swine waste from the slurry pit into the acidogenic digester, which corresponds to hydraulic retention time of 4 days for the acidogenic digester and of 11 days for the methanogenic digester. Digester temperature were well maintained as the set temperature of 37$^{\circ}C$ in the methanogenic digester, while the temperature in the acidogenic digester showed around 34$^{\circ}C$. pH also showed a steady-state results of 7.3 in the acidogenic digester and of 7.6 in the methanogenic digester during the operation period. Average biogas production rate was 0.66$m^3$/$m^3$ digester volume. Reduction rate of total solid and volatile solid were 42.8% and 5.8%, respectively. Total nitrogen and ammonia nitrogen were not reduced during the anaerobic fermentation, however, most of VFAs seemed to be converted to the biogas,. These fermentation performance data may suggest that he newly developed a two-phase anaerobic digester for the swine waste treatment worked so successfully.
담체설치가 고질소함유 양돈폐수의 호기발효에 미치는 영향
손경호,이상락,안정제,권윤정,정태영 한국축산환경학회 2000 축산시설환경학회지 Vol.6 No.2
This study was conducted to investigate the effects of artificial filaments equipped in the aeration tank of aerobic·fermentation system on the removal efficiency of swine wastes which were fermented an aerobically and thus containing high nitrogen. Two aerobic fermentation system each consist4s of 4 tanks ; storage tank, 1st and 2nd aeration tank and settling tank were run before and one or three weeks after equipment of artificial filament in the aeration tanks. Total solids concentration tended to increase by aerobic fermentation in all running periods. However, decreased(P<0.05) total nitrogen concentration was shown three weeks after the equipment of artificial filament. Ammonia nitrogen concentration also largely decreased(p<0.05) in both running periods of one and three weeks after equipment of artificial filaments. These results suggest that the artificial filaments may improve the removal efficiency of nitrogen in swine wastewater containing high nitrogen during aerobic fermentation.
남은 음식물발효사료가 산란계의 난생산성과 계란품질에 미치는 영향
정승헌,이상락,김철,안정제,맹원재,권윤정,Chung, S.H.,Lee, S.R.,Kim, C.,Ahn, J.J.,Maeng, W.J.,Kwon, Y.J. 한국가금학회 2000 韓國家禽學會誌 Vol.27 No.1
An experiment was conducted to investigate the effects of feeding fermented food waste on the egg production and egg qualities in laying hens. A lot of 30 commercial layer(ISA Brown) at the age 58 weeks were placed in individual of 80% commercial feed and 20% fermented food waste(C80%+F20%), a mixture of 50% commercial feed and 50% fermented food waste (C50%+F50%), and a mixture of 20% commercial feed and 80% fermented food waste (C20%+F80%). Daily measurements were made on feed intake, egg production rate, egg weight, yolk color, Haugh unit, shell color during the experimental period. At the end of the experiment, body weight change and egg cholesterol contents were determined. The results indicate that up to 50% of basal diet could be supplied by fermented food waste with little depression in feed intake and efficiency in egg production (p<0.01). Egg weight, egg shell thickness and Haugh units were not significant different between the treatments and the control. Egg color quality improved with increasing the proportion of the fermented food waste in the diet.