초음파를 이용한 하수 슬러지 분해에서 유기물 방출과 질소 거동

윤용수,강광남,최석순,Yoon, Yong-Soo,Kang, Gwang-Nam,Choi, Suk-Soon 유기성자원학회 2002 유기물자원화 Vol.10 No.4

The sewage sludge with concentrated MLSS, ranging from 5967 to 8400mg/L was degraded by ultrasound. In this study, ultrasound treatment was used to investigate the behavior characterization of SBOD, sludge biodegradation, C/N ratio, TN, turbidity and sludge morphology. From the experimental results of C/N ratio change and TN removal, the optimal irradiation time was found to be 10 minutes. The results showed the relative index of sludge biodegradation(SBOD/TCOD) was enhanced to 0.76 from the initial value of 0.013 at the 5967mg/L MLSS, during the 60minutes treatment. Throughout this research, the results provide useful engineering reference data for reuse of sewage sludge using ultrasound. MLSS 농도가 5967에서 8400mg/L인 농축 하수슬러지가 초음파에 의하여 분해되었다. 본 연구에서는 초음파를 이용한 하수슬러지의 처리시 용해성 BOD, 슬러지 생분해성, C/N 비, 총질소, 탁도, 슬러지 형태학적인 변화에 대한 거동 특성을 조사하였다. C/N비와 총질소 제거 실험에서 최적의 초음파 조사시간이 10분임을 알 수 있었다. 그리고 조사시간 60분 경과한 MLSS 5967mg/L의 슬러지 생분해도(SBOD/TCOD)는 초기값 0.013에서0.76으로 증가되었다. 따라서 본 연구를 통하여 얻어진 실험 결과들은 초음파를 이용한 하수슬러지 재활용에서 유용한 공학적 참고자료로 활용될 수 있을 것이다.

전기분해에 의해 제조된 NaOCl을 이용한 염색폐수의 처리 특성(II)

윤용수,하범용,Yoon, Yong-Soo,Ha, Beom-Yong 한국섬유공학회 2006 한국섬유공학회지 Vol.43 No.4

This study was performed to determine the feasibility of electrolytically produced NaOCl solution for the treatment of dyeing wastewater discharged from textile industry. Industrial dyeing wastewater was pre-treated by PAC coagulant and the optimal pH and dosage for coagulation were 6.5 and 0.05 v/v%, respectively In this pre-treatment process $COD_{Mn}$, color and suspended solids removal efficiency were 66%, 91% and 85%, respectively. After pre-treatment by coagulation, NaOCl solution made by electrolysis was used for the treatment of industrial wastewater. The optimal mixing ratio with NaOCl solution and dyeing wastewater was determined to be 1:5 at pH 5.0 and in these conditions, color and removal efficiency were 99% and 88%, respectively. From these results, we can expect that NaOCl solution produced by electrolysis with salt of a lower price can be used for the treatment of industrial dyeing wastewater conveniently and effectively, and can overcome disadvantage of a commercial NaOCl solution with a bad storage and delivery properties to decreas oxidation ability.

황산구리 용액으로부터의 구리회수공정에서 초음파에 의한 전착반응의 증대효과

윤용수,홍인권,이재동,정일현 ( Yoon Yong Soo,Hong In Kwon,Jae Dong Lee,Jeong Il Hyun ) 한국공업화학회 1994 공업화학 Vol.5 No.2

본 연구에서는 초음파의 Cavitation에 의한 혼합효과와 표면세정 효과 그리고 유효 충돌빈도의 중가효과를 이용하여 구리이온을 함유한 용액으로부터 전착반응에 의한 구리의 회수공정에서 전착반응속도를 증가시키고자 초음파 진동자를 직접 반응기 벽면에 부착시킨 반응기를 제작하였다. 초음파 반응저에서 과전압과 황산구리의 농도를 변수로 하여 반응시간에 대한 전류밀도를 측정하고, 음극에 석출된 구리의 양에 의하여 초음파에 의한 반응속도 증가효과에 대하여 연구한 결과 초음파에 의한 효과는 과전압이 2.1V, 황산구리의 농도가 0.1M일 때 석출된 구리의 양이 초음파를 가하지 않은 반응기에 비하여 최고 582.2%까지 증가하였으며, 전류밀도는 최고 277.8% 증가하였다. 또한 전류밀도와 구리 석출량의 증가를 확산충의 두께 감소에 의한 증가효과와 표면세정과 유효충돌빈도의 증가에 의한 효과로 나누어 해석한 결과 초음파에 의한 확산충의 두께 감소로 인한 총괄 반응속도 증가율은 과전압이 2.2V, 황산구리의 농도가 0.1M일 때 최고 277.8%로 나타났으며, 표면세정과 유효 충돌빈도의 증가로 인한 총괄 반응속도 증가율은 과전압이 2.1V, 황산구리의 농도가 0.1M일 때 최고 253.6%로 나타났다. In this study, the ultrasound which provides the properties of mixing, and surface cleaning effect, the increase of the effective reaction surface area and the enhancement of the effective collision frequency, was used to enhance the recovering efficiency of Cu from the Cu-ion containning waste water. The ultrasonic reactor used in this study was designed and constructed for improving the disadvantage of the existing ultrasonic reactor. From the experimental result and its analysis, we obtained following conclusions. 1. The ultrasound increased the rate of electrochemical deposition to 582.2% in maximum at the condition of 0.1M-CuSO_4 and 2.1 V-overpotential. 2. The enhancement effect of ultrasound induced by the reduction of diffusion layer thickness was 277.8% in maximum and induced by the other effect except for the reduction effect of the diffusion layer thickness was 253.6% in maximum at 0.1M-CuSO_4 and 2.1V overpotential. 3. This study gave the possibility of the scale-up of ultrasonic reactor and in particular, ultrasonic reactor would be effective in the treatment of waste water containing a low concentration of Cu ion.

전기분해에 의해 제조된 NaOCl을 이용한 염색폐수의 처리 특성(I)

윤용수,하범용,노방타잉후이,Yoon, Yong-Soo,Ha, Beom-Yong,Thanh Huy, Ngo Van 한국섬유공학회 2005 한국섬유공학회지 Vol.42 No.5

This study was carried out to investigate the feasibility of using electrolytically generated NaOCl solution for treatment of wastewater containing an acid dye(C.I. Acid Red 114). The NaOCl was produced by the electrolysis of aqueous NaCl solution. In order to asses the treatment characteristics, we evaluated the effect of pH and mixing ratio of the NaOCl solution to colored wastewater on the color and chemical oxygen demand$(COD_{Mn})$ removal. The optimum conditions for the dye and $COD_{Mn}$ removal were determined to be pH 5.0 and mixing ratio of 1 :9, at which more than $88\%$ color and $87\%$ $COD_{Mn}$ were removed within 10 min reaction time. Reaction rate constants for the 300 and 500mg/l of artificially prepared dyeing wastewater were estimated as 0.1764 and $0.1737 min^{-1}$ for color removal and 0.1197 and $0.1436 min^{-1}$ for $COD_{Mn}$ removal, respectively.

오존과 초음파에 대한 도시하수슬러지의 처리특성

윤용수 ( Yong Soo Yoon ),배철호 ( Chul Ho Bae ),최석순 ( Suk Soon Choi ) 한국공업화학회 2002 공업화학 Vol.13 No.7

본 연구에서는 오존과 초음파를 이용하여 도시하수 처리장에서 발생하는 슬러지를 처리하고, 처리 전ㆍ후의 슬러지 특성을 비교ㆍ검토함으로써 오존과 초음파의 이용 가능성에 대하여 확인하였다. 초기 MLSS농도가 7233 mg/L인 슬러지 중에 존재하는 용해성 유기물의 용출속도상수(k)는 초음파 처리 경우에 0.297 min^-1, 오존처리 경우에 0.102 min^-1로 나타났다. 슬러지의 파괴에 의해 용출되는 유기물의 양을 확인하기 위하여 SCOD, SBOD를 분석하였으며, 영양염류인 총질소와 총인의 용출에 대하여 고찰하였다. 초음파처리에 의해 MLSS 1 g당 SCOD와 SBOD는 각각 0.127g, 0.181g이 용출되었으며, T-N과 T-P는 각각 0.038 g, 0.039 g이 용출되었다. 또한 오존처리시에는 SCOD와 SBOD는 각각 0.038 g, 0.058 g이 용출되었으며, T-N과 T-P는 각각 0.011 g, 0.012 g이 용출되었다. 그리고 슬러지의 생분해 가능성의 상대적인 척도가 되는 SBOD/TCOD비는 MLSS농도가 5733 mg/L인 슬러지의 경우 초기 0.024에서 초음파와 오존처리된 후에 각각 0.51과 0.21로 크게 증가되었다. In this study, ozone and ultrasound were adopted for the treatment of waste sludge from the municipal sewage treatment plant, and the properties of the treated sludge and that of the raw sludge were compared. For the waste sludge with MLSS concentration of 7233 mg/L, the degradation rate constants of dissolved organic matters were 0.297 min^-1 and 0.102 min^-1 for ultrasound treatment and ozone treatment, respectively. To evaluate the characteristics of the released organic matters and nutrient by sludge degradation in the ultrasound treatment, SCOD, SBOD, T-N and T-P were analyzed. It was found that 0.127 g of SCOD, 0.181 g of SBOD, 0.038 g of T-N and 0.039 g of T-P were released per g of MLSS, respectively. In the case of ozone treatment, the quality of released of SCOD, SBOD, T-N and T-P were 0.038 g, 0.058 g, 0.011 g and 0.012 g per g of MLSS, respectively. In addition, the SCOD/TCOD, relative index of sludge biodegradation was enhanced to 0.51 with ultrasound treatment and 0.21 with ozone treatment from initial value of 0.024 in waste sludge with MLSS concentration of 5733 mg/L.

티타늄 실리사이드 감지소자의 결함에 의한 Band-gap의 제어

윤용수 ( Yong Soo Yoon ),정일현 ( Il Hyun Jung ) 한국공업화학회 2002 공업화학 Vol.13 No.8

공공의 존재와 그레인의 크기, 결정화도, 불순물과 같은 결함들은 band gap의 결정과 막의 응용성에 중요한 역할을 하며 실험 조건에 따라 다양한 특성을 나타내고 있다. 본 연구에서 a-Si:H는 rf파워가 증가할수록 공공이 많이 존재하였으며, 열처리 시간을 증가시켰을 때 막의 결정성, band gap과 결함수 모두 증가하였다. 또한 그레인 수가 증가할수록 band gap과 결함수는 감소하는 것으로 나타났으며, 결함수와 band gap은 서로 비례 관계에 있다. 따라서 특정 센서에 응용하기 위한 막은 결함수를 제어하므로써 적절한 band gap을 가지게 할 수 있다. The defects, such as vacancy, grain size, the degree of crystalline, impurities (or doping materials) etc., play an important role in the determination of band gap and the application of film. They show various properties, depending on experimental conditions. In this work, it was found that vacancy with increasing rf-power was plentifully existed in a-Si:H film and the crystallinity of a film, the band-gap and the number of defects increased with long annealing time. It was shown that the band-gap and the defect-number decreased with increasing the density of grain. The number of defects was found to the be in proportion to the band gap. Consequently, we found that the band-gap with controlling the number of defect can be variously applied in the specific sensor.

시칠리아의 언어 지층 연구

윤용수 ( Yoon¸ Yong-soo ) 부산외국어대학교 지중해지역원 2021 지중해지역연구 Vol.23 No.4

Sicily is located in the center of the Mediterranean Sea, so it is not awkward to call it the ‘navel of the Mediterranean’. Sicily is the crossroads of the eastern and western Mediterranean horizontally, and longitudinally it is also a stepping stone connecting the European continent and the African continent. Because of this geographical feature, Sicily has been ruled by Carthage, Greece, Rome, Byzantine, Arab, Norman, France and Spain from before BC. Therefore, Sicily can be said to be a living witness and a cultural museum of the Mediterranean, which has experienced a historical storm. In this research, I try to trace and analyze the process of forming the cultural strata of Sicily by the Greek, Latin and Arab Islamic cultures, focusing on the historical development process and cultural attributes of Sicily. In addition, I intend to analyze the lingual stratum of Sicily in conjunction with the study on the cultural strata of Sicily. In other words, this research is not a linguistic analysis of the Sicilian language itself, but rather a study of the background, process, and influence of Greek, Latin, and Arabic forming the linguistic strata of Sicily. This research is also a study on the exchange of civilizations focusing on the process of the accumulation of various cultures, the coexistence of various cultures and languages and the development of new cultures and languages.

모로코의 언어 혼종 연구

윤용수(Yoon Yong Soo),최춘식(Choi Chun Sik) 한국아랍어아랍문학회 2014 아랍어와 아랍문학 Vol.18 No.3

Morocco is located at the crossroads of Africa, Europe and the Middle East. This strategic location has made Morocco open to a variety of linguistic influences by the Phoenician language, Berber language, Greek language, Arabic, Spanish, Portugal language and French. Given this complex multilingual situation related historical layers, the languages used in Morocco have mutual competed and overlapped for social, economic, cultural and political divisions. Therefore Morocco provides a rich setting for researching the conflict and tensions between languages in Morocco. Morocco has became a multicultural society since the French occupation even though this country had been called the Arabic diglossia society or bilingualism society between Arabic language and Berber language for ages long. These dynamic language change relating the historical process also provides us the affluent environment to study the hybridity of languages in Mediterranean. Therefore I expect to investigate the below issues in this thesis. The first is to give an overview of the sociolinguistic situation in Morocco focusing on the post independent of Morocco. The second is the discussion of some issues related to the language policy(Arabization) pursued since independence in 1956 and the language attitudes reflecting on identity issues among Moroccan following recent changes in language policy.

히터트리거를 이용한 고온초전도전원장치의 제작 및 특성 실험에 관한 연구

尹庸銖(Yong-Soo Yoon),金鎬民(Ho-Min Kim),秋龍(Yong Chu),李昌烈(Chang-Yul Lee),高太國(Tae Kuk Ko),韓泰洙(Tae-Su Han) 대한전기학회 1999 전기학회논문지 B Vol.48 No.9

고온초전도동기모터의 부하변동에 따른 계자권선의 교류손실 해석에 관한 연구

尹庸銖(Yong Soo Yoon),宋命坤(Myung Kon Song),張源?(Won Kap Jang),張仁培(In Bae Chang),洪啓源(Gye Won Hong),李相鎭(Sang Jin Lee),高太國(Tae Kuk Ko) 대한전기학회 1999 전기학회논문지 B Vol.48 No.4