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토양미생물을 이용한 축산폐수 처리공정의 적정부하율과 질산화공정의 특성
하준수,신남철 한국환경농학회 2000 한국환경농학회지 Vol.19 No.2
고농도 축산폐수의 과부하 고도처리를 위한 토양미생물을 이용한 공정개발 연구결과 질소·제거율은 97% 이었다. 질산화를 위한 최소 HRT는 11일 이었으며 이때의 SRT는 25일 이었다. HRT 5일에서 11일 사이에도 질산화는 있었으나 이 때는 NO₂-N이 대부분으로 완전질산화를 달성하지는 못했다. pH와 NO₂^--N, NH₃^--N 의 관계로부터 반응조는 nitrosomonas 저해영역에 속해 있었으나 약간의 pH 조절로 충분한 질산화를 달성할 수 있을 것으로 판단되었다. Removal rate of nitrogen compound containing swine wastewater was 97 percent in case of high loading rate treatment of swine wastewater at studies for process development using soil microorganism. Minimum hydraulic retention time(HRT) for nitrification process was 11 days and solid retention time was 25 days. Nitrification was between 5 and 11 days but this time NO₂-N was remained. Reactor condition was injured to nitrosomonas according to pH, NO₂^--N, and NH₃^--N concentration but this condition was recover to pH controlling.
영양소제거 공정의 기질 정량관계에 대한 온도와 기질부하의 영향
하준수,최의소,박재홍,길경익,김성원 대한상하수도학회 2003 상하수도학회지 Vol.17 No.6
This research has been performed to evaluate the stoichiometric relationship between removed COD and nitrogen or phosphorus. A modified A²/O process, which was equipped with an external nitrification tank and a switching reactor, was operated with a capacity of 50㎥/d. From the results, it has been concluded that the stoichiometric values were varied by temperature condition or input COD loads. In case of denitirfication, the requirement g COD for removed nitrate nitrogen ranged 0.13 to 10.5g, and the compensation coefficient of temperature was evaluated as 1.028. For phosphorus removal, the required COD was about 7.5gCOD_(consumed)/gP_(released) and 0.54gPHACOD_(storage)/gP_(uptake). During rainy season, as it appeared a lower organic substrate loads, the PHA(Poly Hydroxy Alkanoate) contents of biomass was reduced. From the relationship between influent BOD, and the sum of removed TN and TP, the ratio for rainy and winter season was about 4.8 and 5.8g BOD/g (TN+TP) each others. Therefor, the substrat ratios for nitrogen and phosphorus removal appeared to be affected by temperature and influent organic substrate loads.
하준수,조홍만,이현주,김선도 대한고관절학회 2019 Hip and Pelvis Vol.31 No.2
Except when caused by direct and definite mechanisms (e.g., injury of the vessels to the femoral head), the pathophysiology of avascular necrosis of the femoral head has not yet been fully elucidate. While non-traumatic avascular necrosis of the femoral head is known to be caused by alcohol, steroids and various diseases, it may also occur without such events in a patient’s history. Herein, a case of bilateral avascular necrosis of the femoral head caused by asymptomatic adrenal cortex incidentaloma which was initially misdiagnosed as idiopathic is reported along with a literature review.
지방중소도시의 지역자원을 활용한 구도심 재생방향에 관한 연구
하준수 한국환경정책학회 2011 한국환경정책학회 학술대회논문집 Vol.2011 No.2
Since the modern era many cities have focused on quantative development due to an excessive emphasis on land use and efficiency . Cities nowadays are facing a serious aftereffect of urban sprawl because of the development ignoring the cities` natural environments and historical remains caused by a fragmentary understanding of industrialization and economics. Hostoric cities have their own attraction, containing varied lives and cultural traces. The charm of those cities have been formed through a long period, and city development projects have a significance in terms of creating a cultural city that emphasizees the quality of life in this era of competetion among cities. Cities with rich cultural resources, such as so some representative cities, Andong, Gyeongju, Buyeo, and so on, are trying to lift the quality of living environment by building a unique regional image with perspectives to protection, improvement, and creation for future change. Also, the number of cities to experiment the framework for a historical city from a local and perspective is not enough, due to the unsustainable urban development through the times of telescoped growth. In Naju Walls area, tangible heritage materials including national treasures, historic sites, city-designated heritage are centered within 300- meter-radius, and the structure of walls space are mostly kept as it were in the past because there has not occurred any development yet. Espcially the space centered around the inn and the spce for the authorities and the house of the district magistrate retain their original forms. Therefore, if frameworking and maintaimimg is successful, Naju can be reborn as a competitive historical citiy, beacause the high-density development has not begun in the area. Thus the current study has its purpose on creating Naju`s own uniqueness by examining the historical environment of Naju Walls space and developing methods using the cultural environment and regional resources in the Walls area.
하준수,이준엽 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
A Fluorine substituted triazine acceptor for blue thermally activated delayed fluorescent (TADF) emitters has been developed. The FTrzTCz emitter had a high efficiency of 18.5% and improved efficiency roll off. In addition, FTrzTCz showed a high quantum efficiency of 17.8% as an assistant dopant in green fluorescent devices. By preventing dexter energy transfer, FTrzTCz worked well as a TADF emitter and sensitizer system devices.