Suppressive Effect of Bacillius subtilus Isolated from Composts to Phytotoxic Microorganisms

PHAE, Chae-Gun 朝鮮奬學會 1988 學術論文集 Vol.17 No.-

Suppressive effect of ten composts to phytotoxic fungi, Fusarium oxysporum, was investigated in vitro on agar plate test. Four composts among them showed a clear inhibitory zones to the growth of the fungi. Bacteria which were associated with the effect were isolated and identified as Bacil¬lus subtilis. The culture broth of this bacteria also represented an inhibitory zone in in vitro test. Suppressive ness of the broth was further investigated using other phytotoxic fungi and bacteria in vivo tests and a broader suppressive spectrum was obtained.

A Study on Degradation Characteristics of Organic Materials by Mesophilic and Thermophilic Microorganisms in Composting

Phae, Chae-Gun 경희대학교 지구환경연구소 1998 국제세미나 Vol.1998 No.-

Microorganisms was separated under process of composting reaction, basic condition for cultivation of separated microorganism and their property have been investigated. Additionally, the affect to composting reaction when separated microorganism is inoculated to composting process was investigated and principle of biodegradation in composting process has been studied. Under activated composting reaction, mesophilic microorganism(Mj-7) and thermophilic microorganism(Hj-8) were separated. When such microorganism was inoculated to reactor respectively, it was found that in the reactor inoculated with Mj-7 showed high range of initial temperature rise and degradation of organic matter was more active than level of contribution of Mj-7. However, when inoculated with Hj-8, the speed of reaction was very slow and gradual rise of temperatures after elapse of considerable time was observed. It is proved that inoculation of mesophilic microorganism initially is effective in inducing thermophilic microorganism through emission of oxidation heat by predomination of mesophilic microorganism playing significant role in composting process. Both microorganism mentioned above mixed and inoculated in composting process for check on the level of contributions to biodegradation, the result showed same pattern in initial temperature such as reaction inoculated mesophilic microorganism, however period maintaining high temperature was lengthened and degradation of organic matter was advanced. From such result it is proved that thermophilic microorganism gradually being dominated by increasing ambient temperature depend on mesophilic microorganism dominated in initial step. It has been proved that smooth reaction in composting can not be assured with innoculation of thermophilic microorganism alone, therefore it is essential to activate reactions of mesophilic microorganism inducing to apparence of thermophilic microorganism.

Oblique angle deposition of nanocolumnar TiZrN films via reactive magnetron co-sputtering technique: The influence of the Zr target powers

W. Phae-ngam,M. Horprathum,C. Chananonnawathorn,T. Lertvanithphol,B. Samransuksamer,P. Songsiriritthigul,H. Nakajima,S. Chaiyakun 한국물리학회 2019 Current Applied Physics Vol.19 No.8

Nanocolumnar titanium zirconium nitride (TiZrN) films deposited on silicon wafer substrates were fabricated via reactive magnetron co-sputtering with oblique angle deposition (OAD) at room temperature. The influences of the sputtering power of Zr target varied from 100 to 300 W, on the structure, morphology and composition of the nanocolumnar TiZrN film were investigated by gracing-incidence X-ray diffraction (GIXRD), field emission scanning electron microscope (FE-SEM), transmission electron microscope (TEM), energy dispersive X-ray spectroscopy (EDS), atomic force microscope (AFM) and photoelectron spectroscopy (PES). The GIXRD patterns revealed that the prepared films deposited at different sputtering powers of Zr target were crystalline in cubic phase with preferential orientation (111) and (222) planes of ZrN and TiN, respectively. The morphology obtained from FE-SEM showed well aligned slanted nanocolumnar structure, which come from the OAD technique. Increasing the sputtering power of Zr target, led to high adatom energy and enhanced collision effect during film deposition which the nanocolumnar showed obvious change in the diameter, length and tilt angle. The EDS mapping inside the nanocolumnar confirmed the homogeneity of the Ti, Zr and N element distributed in the nanocolumnar TiZrN films. Finally, the tribology behavior was preliminarily investigated based on the hardness of the nanocolumnar film and discussed in this manuscript.

Effects of the Redox Potential of the Acidogenic Reactor on the Performance of a Two-Stage Methanogenic Reactor

( Chae Gun Phae ),( Wan Kyu Lee ),( Byung Hong Kim ),( Jong Ho Koh ),( Sang Won Kim ) 한국미생물생명공학회 1996 Journal of microbiology and biotechnology Vol.6 No.1

Study on Methods to Review the Stabilization Parameters of Organic Sludge Using Respirometer

( Chae Gun Phae ) 한국폐기물자원순환학회(구 한국폐기물학회) 2008 WASTE RECYCLING AND MANAGEMENT RESEARCH Vol.13 No.1

하수슬러지 퇴비의 식물생육에 대한 적정 시비량 검토

배재근(Chae-Gun Phae),정경철(Kyong-Chul, Joung),곽노혁(No-Hyuk Kwak),조재경(Jae-kyoung Cho) 유기성자원학회 1999 유기물자원화 Vol.7 No.2

본 연구는 하수슬러지 퇴비를 이용하여 4년간 5차에 걸쳐 다양한 토양 및 식물에 대한 식물실험을 수행한 결과 하수슬러지 퇴비가 식물성장에 유용한 것으로 판명이 되었으며. 그 시비량은 토양종류. 하수슬러지내의 유기물함량, 식물에 따라 많은 차이가 있음을 확인할 수 있었다. 연구를 통하여 얻어진 적정시비량은 비교적 유기물함량(46%) 이 높은 S하수처리장의 하수슬러지 퇴비를 이용한 사질토양인 빈영양토양에서는 0.2톤/아르(a) 였으며. 부영양토인 흑갈색 토양에서는 0 .1 2돈/아르 (a) . 빈영양토양인 흑갈색에서는 0.4톤/a가 적정한 것으로 판명이 되었다 또한 비교적 유기물의 함량이 낮은 N하수처리장의 하수퇴비와 빈영양토양에서의 5차실험 결과에서는 시비량이 0.6t/a로 상대적으로 많아도 된다는 결과가 얻어졌다. 이러한 실험결과를 이용하여 유기불함량 및 토양의 종류에 따라 시블레이션을 실시한 결과, 1회 시비량은 0.2t/a로 계산되었으며, 연간 2회사비의 연작에 대한 영향을 고려한다면 연간 약 O .4t/a가 시비제한 최적량으로 결콘내릴 수 있었다. 이러한 값은 유기물함량과 토양종류에 따른 영향을 상호보완한 값으로 식물에 대한 성장저해현상을 최소화하는 것이 가능하다. The effect of compost to force the cultivation using various soil and vegetation was investigated 5 times in the field for 4 years. Sewage sludge compost was validated to be useful fertilizer for the growth of a plant. and the optimal amendment amounts of compost to soil depended on the kinds of soil and vegetation. and the organic contents of compost. In the case of compost with high organic content. the optimal amended compost weight was O.12t/are in fertile-dark brown(eutrophic) soil. O.2t/are in sandy soiHtrophic) and O.4t/are in infertiledark brown(oligotrophic) soil. respectively. In the 떠se of compost with low organic content. on the other hand. the amentments of compost up to O.6t/are was allowable without negative effect on the applied vegetation. Consequently. it can be believed that the sewage sludge compost is useful fertilizer. if keep the optimal amendment amounts(O.4t/are.year) to improve soil on cultivation of vegetation.

사상균 (絲狀菌) Deco11 에 의한 반응성염료의 탈색분해

배재근(Chae Gun Phae),백광욱(Kwang Wook Baek),정전성(正田誠) 大韓環境工學會 1993 대한환경공학회지 Vol.15 No.3

배기가스순환시스템울 적용한 소멸 퇴비화장치의 효률검토

배재근(Chae-Gun Phae),김종찬(Jong-Chan Kim) 유기성자원학회 1999 유기물자원화 Vol.7 No.2

Existing composting system was improved to have a high performance for organic degradation. deodorization and energy reduction. Compared with conventional devices. this developed system uses the heat recovered from platinum catalytic tower by three times heat exchange in which 65% of exhaust gas was recirculated. Evaporation of water was made easy by maintaining negative pressure in entire system. It was possible for reaction to be maintained steadily by microorganism agent. The optimum mixing volume ratio of garbage to sawdust was 15:1 contrary to 20:1 in conventional one. Moreover. aerobic condition was maintained efficiently. Effects obtained by using a inner circulation system were as follows. It was possible to reduce the ammonia causing offensive odor and verified that consumption of electricity cut down to 1/3 with reduction of exhaust gas inflowing. According to this inner circulation. the optimum air flow was O.44m' to 100kg treatment capacity. The electricity consumption was changed in proportion to inflowing air volume. 본 연구는 기존의 소멸화장치를 개선하여 에너지절감과 동시에 탈취효과를 극대화시키면서 유기물의 분해능력을 극대화시키는 장치릎 개발하기 위하여 실시되었다. 기존의 장치와 비교하여 3차에 걸친 열교환을 통하여 백금촉매탑에서 발생하는 폐열을 회수하여 이용하게 하였으며, 배기가스의 65% 정도를 재순환하게 하였다. 또한 장치전체에 대해서는 감압을 유지하게 하여 수분의 증발을 원활하게 하였다. 미생물제재에 의하여 반응을 안정적으로 유지핸 것이 가능했으며, 또한 분해매체제는 기존의 처리용량의 20배용적을 사용했으나, 본장치에서는 15배용적에 있어서도 미생물활성화가 가능하며, 호기성분위기를 효율적을 유지하는 것이 가능했다. 배기가스의 내부순환을 시스템을 사용함에 따라 얻어지는 효과에 대하여 검토한 결과. 내부의 악취물질인 암모니아가스농도를 감소시키는 것이 가능했으며, 탈취탑으로 유입되는 배기가스가 경감됨에 따라 전력비가 1/3선으로 절감되는 효과가 확인되었다. 이러한 내순환에 따라 최적공기량은 100kg처리용량에 대하여 O.44m²로. 이 공기량의 변화에 따라전력비가비례하여 변화하는현상이 확인되었다.

발효토에의한음식물쓰레기 소멸화 가능성의 검토

배재근(Chae-gun Phae),주흥수(Hung-soo Joo),박정수(Jung-soo Park),최헌수(Heon-su Choi),장기훈(Ki-hun Jang) 유기성자원학회 2000 유기물자원화 Vol.8 No.4

본 연구는 일반 단독주택 등의 가정에서 쉽게 사용할 수 있는 최상의 발효토를 도출하고자 직접 음식물쓰레 기 소멸실힘을 행하였다. 실험 결과 반응기 내 미생물의 활성에 의해 음식물쓰레기를 투입한 직후의 초기에 비해 다 음 음식물쓰레기 투입직전인 9 일 후의 온도,무게,함수율, vs의 값이 감소하였고,모든 반응기에서 소멸화는 진 행되었다 그 중에서도 S대 미생물제재를 발효토로 사용한 반응기인 F, 4 번 반응기가 가장 좋은 결과를 보였으며, 음식물의 투입주기를 단축하는 것이 가능하였다. 반응이 양호하지 않은 반응기는 시간이 지날수록 그 무게와 수분이 증가하여 장기간 반응 시 악영향을 미칠 것으로 판단된다 염분은 시간이 지날수록 소멸되지 않고 축적되었다. 성능이 우수했던 S 대 발효토를 이용한 적용가온도에 크게 영향을 받았다. 그러나 반응기간은 S대 미생물을 고정한 발효토를 이용한 반응기를 200 C에서 유지하였을 때 3 일 정도로 처리기간을 단축 시킬수 있었다. This study was performed to determine the best fiεrmentation soil in vanishing composting of individual residence garbage. At the result, temperature, weight, warer content, volatile solid were reduced gradually by reaction of microorganism in the reactors after food was inserted for 9 days. The vanishing possibiliry was observed in all reactors. The best reactor was F and 4 mat seeded microorganisms which were provided at S Universiry. In addition it was possible to shorten cycle of putting in food waste. Inactivated reactors were be bad because of increased water content for long reaction time. Sodium chloride was accumulated and not vanished as time passed. But reactor was not insulated, the activities of microorganism in the reactor were affected highly by cold weamer(about less than 12 C). When rhe srudy was exrended ro fllld our rhe feasibiliry of applicarion, rhe rerention time could be shortened ro 3 days form 9 days, when rhe microorganism reactor rhar used the fermentarion soil seeded microorganisms which were provided at S Universiry was maintained about 20 oC.

Geotrichum Candidum Deco 11에 의한 염색폐수의 미생물 탈색

배재근(Chae Gun Phae),김혜경(Hae Kyoung Kim) 大韓環境工學會 1996 대한환경공학회지 Vol.18 No.9