http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
[Oral Session 4] A Novel Method for Calcjum Hardness Control of Closed OCC Recycling System
Say-Kyoun Ow,Jong-Ho Shin,Bong-Keun Song,Jeong-Yong Ryu 한국펄프·종이공학회 1999 한국펄프종이학회 기타 간행물 Vol.- No.-
A new technique for recycling process water was developed in order to reduce the calcium hardness of the closed OCC recycling system. Calcium ions present in the white water were precipitated as calcium carbonate by a reaction with sodium carbonate, and the CaCO₃precipitates were easily removed from the system by a dissolved air flotation(DAF) method. After the OAF stage, CO₂-gas was purged into the water because the pH of Na₂CO₃-treated white water was reduced to neutral by CO₂ gas.<br/> Since CaCO₃ precipitate tends to stick onto the fine fiber surface and then is selectively removed from the water, a proper amount of suspended solid in the process water acts as an important factor in deciding the removal efficiency. By the application of Na₂CO₃ addition - DAF - CO₂ purging to the short circulated white water. the calcium hardness was significantly reduced by 92% and more. The removal of calcium ions with tine fibers led to drainage improvement, reduction of fresh water consumption, and enhanced efficiency of wet-end chemicals.
남기대 ( Nam Ki-dae ),오세균 ( Ow Say-kyoun ),한종필 ( Han Jong-pil ) 한국공업화학회 1992 한국공업화학회 연구논문 초록집 Vol.1992 No.0
탄소수 10~18 범위의 고급 지방 알콜에 ethylene oxide와 propylene oxide를 10~20mole씩 부가하여 일반식 □인 비이온성 계면활성제를 합성하여 이에 대해 IR, NMR등의 분석을 행하고 이에대한 기포력, 포면장력 저하능, 응집력등의 탈묵제로서의 응용성을 검토하고 이에 대하여 Sodium alkyl Benzone Sulfonate, Sodium Polyoxyethylene nonylphenyl ether sulfate등의 기존 제품을 Blending하여 탈묵에 필요한 기포, 세정 및 응집력 등을 평가하여 기존 시판 및 수입되는 탈묵제와 비교 실험하여 백색도, 잔유 잉크수, 수율 등을 측정하여 탈묵제로서의 응용성과 탈묵시 필요한 탈묵제의 기포, 응집력 등의 제반 기준을 제시하였다. 기존 시판 수입되는 탈묵제 보다 3~8%정도의 백색로 증가와 5~10%정도의 잔유 잉크 제거 능력이 향상 되었음을 알수 있었다.
충전물의 Coagulation이 탈수 및 건조효율에 미치는 영향
윤병태,오세균,전양,Yoon, byoung-Tae,Ow, Say-Kyoun,Jeon, Yang 한국펄프종이공학회 1998 펄프.종이기술 Vol.30 No.2
This study was aimed to investigate any improvement of dewatering and energy saving on the papermaking process when the various types of fillers were used, i.e., clay, talc and grounded calcium carbonate (GCC). Cationic polyelectrolyte and alum coagulants neutralized the surface charge of the filler particles and the filler particles were coagulated. The rates of dewatering and drying were investigated. The results indicated that clay tended to intense anion, while talc and GCC tended to anion trend nearly to neutrality. Clay and talc added with EPI-DMA, P-DADMAC and alum respectively as optimum levels showed a significant efficiency on the dewatering and the turbidity dissipation. However, the turbidity and dewatering rate of GCC decreased, when GCC was added with EPI-DMA and P-DADMAC respectively Drying rate of clay was increased when coagulant added. However drying rates of talc and GCC were not affected by coagulant, while the apprarent drying time of talc and GCC in the absence of any coagulant was shorter than the clay in the presence of a coagulant. The result confirmed that talc or GCC was more efficient than clay on the dewatering and drying, which is consistent with a general knowledge in the collodal science.
New Retention Aids (1) : Flocculation Behavior
( Jong Ho Shin ),( Sin Ho Han ),( Chang Man Sohn ),( Say Kyoun Ow ),( Souk Il Mah ) 한국공업화학회 1993 한국공업화학회 연구논문 초록집 Vol.1993 No.0
Copolymerization of acrylamide(AM) and dimethylaminoethylacrylate methylchloride(DMAEA) was initiated by ammonium persulfate(AP) in the presence of the polymerizable precursor, pentaerythritol triacrylate(PETA), synthesized from pentaerythritol(PETOL) and acrylic acid(AA). Flocculation of ground calcium carbonate and titanium dioxide particles by cationic tri-armed star-like polymers of relatively low molecular weight has been investigated and compared with that by conventional linear polyelectrolytes with special attention being paid to the effect of polymer concentration and shear condition. Also the effect of microparticle addition on flocculation has been examined. The star-like polymers produced small floes with great shear resistance, and the floe size could be increased further by adding microparticulate silica. Based on the experimental results a tail bridging mechanism has been proposed for the star-like polymers.
종이내 수분확산(제1보)-종이의 방습성 평가를 위한 수증기의 정류상 확산 실험-
윤성훈,전양,오세균,서영범,Yoon, Sung-Hoon,Jeon, Yang,Ow, Say-Kyoun,Seo, Yung-Bum 한국펄프종이공학회 1998 펄프.종이기술 Vol.30 No.1
A steady-state molecular diffusion experiment was conducted to evaluate the water vapor proof properties of paper Handsheets prepared from unbleached Itraft pulps(UKP) and old newspapers(ONP) and four different types of polymer-laminated white duplex board were tested under appropriate standard conditions. The diffusivity was determined on the basis of the Fickean first law. Results obtained from this study can be summarized as follows ; 1. The diffusivity data for handsheets showed about $10^{-5}cm^2/min$. whereas polymer-laminated paperboards had remarkably improved water-vapor resistance with about $10^3 to 10^4$ times lower diffusivity : 2. Sheet basis weight, wet-swelling and sizing degree had little influence on the diffusivity of paper; 3 Linear relationship existed between sheet density and diffusivity, and, 4. Highly sfgnificant linear relationship could be observed between diffusivity and Darcy s gas permeability. Results indicate that diffusivity, an intrinsic property of paper, can provide a valuable information for precise evaluation and improved quality control of water-vapor proof properties of paper.
김욱한,손광희,복성해,오세균 한국산업미생물학회 1992 한국미생물·생명공학회지 Vol.20 No.5
효소탈묵용 cellulase와 xylanase 생산을 위한 조건을 조사한 결과 배지초기 pH, Tween 80, 포자접종량, 질소원의 종류 및 탄소원의 종류에 따라 효소 생산량이 크게 변하였다. Cellulase 생산을 위한 최적조건으로는 pH 5.O∼6.5, Tween 80 0.02%, 포자현탄액(1×10^7㎖) 접종량 0.5∼l.0%, 질소원으로 면실박, 탄소원으로 옥분을 사용하였을 때 가장 효과적이었다. 또한, xylanase 생산을 위한 최적조건으로는 pH 6.5, Tween 80 0.Ol%, 질소원으로 corn steep liquor, 탄소원으로는 신문고지를 사용하였을 때 효과적이었으며, 이때 포자현탁액의 접종량은 cellulase 생산의 경우와 동일하였다. 한편, cellulase와 xylanase의 동시생산을 위해서는 플라스크 규모에서 질소원으로 면실박 0.5%, 탄소원으로 신문고지 1.0%와 옥분 2.0%를 첨가하였을 때 효과적이었으며, 이때 생산된 배양액의 cellulase의 활성은 6.11∼7.22IU/㎖, xylanase의 활성은 97.7IU/㎖이었다. 그러나 fermentor 규모에서는 동일 배지조성에서 효소생산이 다소 감소하였으며, 특히 xylanase 경우 배양액의 효소활성이 낮아서 이에 대한 보완이 요구된다. The optimal conditions for cellulase and xylanase production by Trichoderma reesei 28217 were studied for enzymatic deinking of old newspaper. The amounts of cellulase and xylanase from the strain was varied by initial medium pH, Tween 80, inoculum size of spore suspension, and carbon and nitrogen sources. The optimal conditions for cellulase production were pH 5.O∼6.5, 0.02% of Tween 80, 0.5∼1.O% of inoculum size of spore suspension (1×10^7/㎖), cotton-seed meal as nitrogen source, and corn flour as carbon source. On the other hand, the optimal conditions for xylanase production were pH 6.5, 0.01% of Tween 80, corn steep liquor as nitrogen source, and disintegrated old newspaper as carbon source. The inoculum size for xylanase production was the same as for cellulase production. The concomitant production of cellulase and xylanase in shake flask culture was efficiently induced in the medium containing 0.5% cottonseed meal as nitrogen source and 1.O% old newspaper and 2.O% corn flour as carbon sources. In this case the activities of cellulase and xylanase produced were 6.11∼7.22 IU/㎖ and 97.7 IU/㎖, respectively. However, the cellulase production in 5ℓ fermentor scale was slightly decreased compared with that in flask scale. Moreover, xylanase production was severely reduced in a fermentor scale. The study for the reason of decreased enzyme production in fermentor is further needed.