• Journal of the Korean Society of Food Science and Nutrition
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• v.25 no.1
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• pp.94-103
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• 1996

기능성 해조음료를 개발하기 위하여 미역, 톳 및 다시마를 저온하에서 마쇄, 원심분리, 한회여과를 거쳐 생해조 세포액을 얻었으며, 각 해조 생세포액의 성분 분석과 색차 측정 및 관능검사를 통하여 품질평한 결과 다음과 같았다. 원심분리 후 한외 여과에 의한 생세포액의 수율은 생해조에 대하여 6.8~56.5% 였으며, 톳과 미역의 수율은 높았으나 다시마는 수율이 낮았다. 해조액을 한회여과한 다음 동결건조한 시료의 회분 합량은 28~60%였으며, 조단백 함량은 12.7%~6.7%정도 였는데 미역과 톳은 다시마 보다 각 성분의 함량이 많았다. 알긴산과 chlrophyll 및 carotenoid 은 한회여과막에 의하여 대부분 제거되었으나 톳의 polyphenol은 30K 한외여과막에 의해서도 효과적으로 제거되지 않았다. 다시마와 톳 생세포액의 주요 아미노산은 glutamic acid와 aspartic acid 였으며, 미역의 경우는 alanine, aspartic acid, valine이었다. 해조 생세포액중의 무기 질은 칼륨의 함량이 특히 높았으며 양이온의 경우 나트륨, 마그네슘, 칼슘, 철, 아연, 망간, 구리순으로 함유 되어있었다. 음이온으로는 $Cl^{-}$,$SO_{4}^{2-}$,$HPO_{4}^{2-}$,$NO_{3}^{-}$의 함량이 높았으며, I와 Br의 함량은 다시마가 톳과 미역에 비하여 높았다.

• Membrane Journal
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• v.9 no.4
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• pp.193-201
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• 1999

The object of study were the development of membrane process and the optimization of operation condition for membrane system, which was used the pre-treatment system of tap water treatment in steady of conventional process such as coagulation, sedimentation. The higher steady flux is very important factor, by a suitable pre-treatment and optimization of operating condition such as fouling control, crossflow and backwashing method, in membrane system. So, we were observed the effect of flux decline for membrane used by 4 type ultrafiltration(UF) membrane pre-treatment process, and optimized the operation condition of filtration system under various MWCO(Molecular weight cut-off), operation pressure, linear velocity and temperature to maintain higher flux. From these experiment, we were identified that UF process showed a slower flux decline rate and a higher flux recovery than microfiltration(MF) membrane. The water quality of UF permeate was better than that of MF, and was not effected pre-treatment process. In the operation condition, the rate of flux decline was diminished by a higher linear velocity and operation temperature, lower pressure.

• Clean Technology
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• v.12 no.3
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• pp.151-156
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• 2006

Combined membrane process of ceramic microfiltration (MF) and polymer ultrafiltration (UF) was optimized for the removal of color and total organic carbon (TOC) from textile wastewater. Membrane regeneration was performed for the efficient operation by backflushing and chemical cleaning. Flux of 10.3% increased by the pulse backflushing of 1 second every 2 minutes in ceramic microfiltration. Membrane regeneration of 97% was obtained by chemical cleaning with 0.1% sodium hydroxide in polymer ultrafiltration. The removal efficiency of TOC, color and SS (suspended solid) were 84.6%, 97.4% and 100%, respectively. The combined process was found to be suitable for the removal of color and residual organics from textile wastewater.

• Membrane Journal
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• v.9 no.4
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• pp.202-208
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• 1999

The car washing effluent containing various oils and detergent was treated by ultrafiltration membranes. Dead-end type stirred cell (Amicon 8050) with 10, 30 and lOOk dalton membranes was used to determine permeation and rejection characteristics for the car washing effluent. In case of low molecular weight cut-off membranes, the effect of membrane fouling was weak under the applied pressures. However, the permeation flux for YM100 membrane(look dalton) may be affected by oil layer formation on the membrane surface as well as oil particle plugging for a part of membrane pores due to compressible and deformable oil properties. Oil and particle rejections in the permeates were over 95%, but detergent was passed easily through the membranes. Hence, the permeates containing detergent can be recycled to the system, and may reduce water pollution. Also, the car washing effluent was treated continuously by a capillary type ultrafiltration membrane of MWCO 50k dalton. The experimental data were fitted suitably to the cake filtration model.

• Applied Biological Chemistry
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• v.42 no.1
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• pp.49-57
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• 1999

Enzymatic hydrolysis with tuna pyloric caeca crude enzyme(TPCCE) was performed to recover a protein hydrolysate from hoki frame, fish processing by-product. Optimum hydrolytic conditions were pH 10.0, temperature $50^{\circ}C$, and incubation time 12 hrs, and then the degree of hydrolysis was about 60%. The yield of the hydrolysate from hoki frame by enzymatic hydrolysis was approximately 77% on a dry weight basis. The prepared protein hydrolysates were also fractionated through a series of 30, 10, 5 and 1 kDa molecular weight cut-off (MWCO) membranes in order to investigate the effect of their functionalities according to the difference of their molecular size. As the result of studying functionalities of the hydrolysates, 1 K hydrolysate showed the highest solubility over all pHs, and 30 and 10 K hydrolysate showed more excellent emulsifying property and whippability than the other hydrolysates.