• 동위원소뉴스
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• no.8 s.68
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• pp.4-6
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• 2002

• 대한방사선방어학회:학술대회논문집
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• 2011.04a
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• pp.166-167
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• 2011

• KSBB Journal
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• v.10 no.1
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• pp.1-8
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• 1995

A lot of water soluble proteins and lipids are released from minced mackerel meat and lost into the washing waste during the leaching process of Kamaboko or surimi manufacture. The removed proteins and lipids are not only an edible things but also a big burden for treating the wastewater. In order to recover the proteins from the effluent and to use as food stuff, the "pH-shifting" treatment, a modified isoelectric point precipitation method, was tried. This method is based on a myogen-aggregation phenomenon, which occurs when a solution of sarcoplasmic proteins is acidified or alkalified beyond the critical pH zone of 2∼3 or 12∼13 respectively and then neutralized. The maximum amount of precipitation was obtained by shifting the pH of the wastewater from original pH to isoelectric point (pH 4) or alkali pH 12 and then changing to neutral pH. The precipitates were easily collected by filteration or centrifuging at 10,000rpm. The oils which were only floating in the washing wastewater are easily recovered by seperating with oil separator after pouring. The recovered proteins were slightly denaturated during this pH shifting precipitation process, while the composition of amino acids was good balance as a food.

• Proceedings of the Korean Nuclear Society Conference
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• 1997.05b
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• pp.335-340
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• 1997

원전에서 발생하는 방사성 세탁폐액을 환경방사능 Zero Release 개념하에 완전히 처리하는 공정으로서 역삼투막을 이용한 방법이 연구되고 있는데 이에 앞서 역삼투막 공정의 주요 장애요소인 계면활성제 및 현탁물에 의한 탁도 제거를 위한 전처리 공정으로 활성탄과 한외여과막 결합장치를 제작하여 운전하였으며 실험 결과 90% 이상의 높은 세제 제거율과 60% 이상의 탁도 제거율을 얻을 수 있었다.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2016.10a
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• pp.417-418
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• 2016

• Journal of the Korean institute of surface engineering
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• v.12 no.2
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• pp.123-128
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• 1979

本교는 原調査報文 Plating and Surface Finishing;Recovery Pay! Vol 66. No2. (1979) 45~48P을 번역한 것으로 도금폐수의 회수재생에 드는 비용과 장치비 그리고 미국에 있어서의 도금공장의 폐수 회수처리 현황을 알아보는데 참고가 되리라 믿는다.(역자주) Plating and Surface Finishing지의 조사결과는 폐액회수장치를 설치한 도금공장회사들이 화공약품을 절약할 수 있었고, 공장폐수 내에 중금속 함유량의 한계치를 넘지 않도록 하는데 화학처리 비용을 들이지 않거나 최소한 줄일 수 있었다는 사실을 나타내 주고 있다.

• KSBB Journal
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• v.16 no.4
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• pp.403-408
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• 2001

Distillation condensate generated from downstream processing of microbial alcohol fermentation imposes a serious burden to biological wastewater treatment or anaerobic digestion due to its high contents of SS (suspended solids) and TN (total nitrogen), A pilot scale microfiltration of the stillage condensate with a stainless steel SCEPTER membrane of 0.1 ${\mu}$m pore size was carried out to remove SS which was mostly composed of microbial cell residue. A stable permeate flux was achieved when the decanter effluent containing 0.7% of SS was filtered under the conditions of X10 VCR (volume concentration ratio), 2.5 bar of TMP (transmembrane pressure), and 60$^{\circ}C$. When stillage condensate with 2.6% SS was treated directly with microfiltration, VCR below X3 was recommended for a long duration of filtration. The permeate and retentate obtained from microfiltration were recycled to make-up medium of fermentation. Adding permeate or retentate up to 30% of fermentation volume showed no distinguished undesirable influence during the course of alcohol fermentation. Although only slight improvements in the final amount of CO$_2$ evolution and alcohol content were observed, fermentation rate increased so that the required time to reach 450 L/ton of CO$_2$ evolution was shortened to 72% of that with normal media.

• Resources Recycling
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• v.2 no.4
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• pp.1-9
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• 1993

A study on the recovery of nitric and hydrofluoric acids is carried out with pulsed column extractor in order to the industrial application of this process. Firstly, from the continuous experiments about the recovery of acids using domestic stainelss steel pickling solution, it is found out that the free nitric and hydrofluoric acids are only extracted by 70% TBP and the heaby metals such as Fe, Cr and Ni are not extracted. The effectiveness of extraction and stripping generally improves as the pulse velocity(product of amplitude and frequency) is increased, optimum performance typically occuring slightly below an amplitude-frequency product which results in flooding the column because of excessive emulsification. When the pickling solution is treated by 70% TBP at a phase ratio of A/O=1/2 in the extraction and by distilled water at a phase ratio of O/A=1 in the stripping, the concentration of refined acides are 102g/$\ulcorner$ $HNO_3$and 8.8g/$\ulcorner$ HF, respectively and the recovery of $HNO_3$and HF are 90.7% and 75.2%, respectively.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2012.03a
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• pp.119-119
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• 2012

섬유염색산업 중 면섬유의 염색과정에서 발생되는 머서라이징 폐액은 폐수처리장의 pH(수소이온농도)를 올리는 주원인이 되고 있어, 높은 pH에 따른 폐수처리 부과금이나 황산을 이용한 폐수 중화에 사용되는 약품비용이 과다하게 소요되고 있으며, 머서라이징공정에 사용되는 약품인 가성소다 비용이 계속 증가하고 있어, 기업의 환경처리비용 및 약품소모비용에 대한 부담이 매우 큰 실정이다. 본 기술은 머서라이징 폐액에 멤브레인 공정에 적용하여 폐가성소다로부터 가성소다를 회수할 뿐만 아니라, 회수된 가성소다를 다시 머서라이징 공정에 재이용할 수 있도록 하여 약품 절감효과 뿐만 아니라 폐수의 발생량과 오염물질의 농도의 획기적인 저감이 가능한 것이다. 본 연구에서는 서로 다른 기공크기를 갖는 막을 적용하여 투과플럭스, 부피회수율, 부유물질 및 유기물 제거율, 가성소다회수율, 파울링지수 등을 고려하여 폐수 특성에 맞는 가장 적합한 막을 선정하고, 각각의 막에 대하여 온도조건, 압력조건, 화학세정 등의 운전변수를 최적화, 고효율 폐알카리 회수 장치의 경제성 및 기술적 타당성 평가를 통한 가성소다 회수공정을 구성하였다.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2006.06a
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• pp.107-108
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• 2006