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계면활성제를 함유한 산성염료폐수의 응집 탈색에 관한 연구
한태성(Tae Sung Han),윤현희(Hyon Hee Yoon),김병식(Byoung Sik Kim) 한국화학공학회 1999 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.37 No.3
The effect of various surfactants used in textile dyeing processes on coagulation treatment of dying wastewater was investigated. When alum was used as a coagulant, the color removal rate of milling-type acid dyes was significantly decreased by the presence of nonionic surfactants. The combined use of inorganic and organic coagulants achieved an excellent color removal rate of more than 95% for the most of acid dyes tested in this study. In the combined coagulants treatment, nonylphenol ether nonionic surfactants and anionic surfactants had no significant effect on the color removal efficiency. However, poly(oxyethylene) alkylamine nonionic surfactants decreased remarkably the color removal rate. The decrease of the color removal rate was more severe by the surfactant having smaller number of ethylene oxide group.
기술정보 : 난분해성 후렉소잉크 폐수중 유기물 및 색도제거를 위한 철촉매 공기산화 공정의 적용
조용덕 ( Yong Duck Cho ),윤현희 ( Hyon Hee Yoon ),박상준 ( Sang Joong Park ),김종성 ( Jong Sung Kim ),이상화 ( Sang Wha Lee ) 대한상하수도학회 2006 상하수도학회지 Vol.20 No.4
The oxidation processes of metal catalysis were practically applied into the flexographic inks wastewater treatment to derive the most effective and economical system among all the processes of iron-salts coagulation, iron-catalyzed air oxidation, and coagulation followed by biological treatment. The iron concentration and pH were optimized as 2.8×10(-3) mol and 5.5~6.0, respectively, for all the oxidation processes. At the optimal reaction conditions, the removal efficiencies of TCOD(Mn) and Color were as follows for the respective process: ⅰ) 75% TCOD(Mn) and 77% Color removals for iron-salts coagulation, ⅱ) 91% TCOD(Mn) and 90% Color removals for iron-catalyzed air oxidation, ⅲ) 74~92% TCOD(Mn) and 81~90% Color removals for coagulation followed by biological treatment. Based on the economical and technological aspects, iron-catalyzed air oxidation was confirmed as the most effective process in the treatment of industrial wastewater.
김영준,김영성,장호남,이준식,윤현희 한국화학공학회 1982 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.20 No.4
完全混合式 반응조와 充塡塔 반응조를 수직으로 연결한 새로운 형태의 폐수처리 장치를 고안하였다. 4.16ℓ의 完全混合 반응조는 內部에 원통형의 流路를 설치함으로써 自動的으로 혼합이 되도록 하였고, 둘째단으로 가기 전에 슬러지가 재순환되도록 하였다. 充塡塔의 부피는 1.84ℓ였으며 Raschig ring으로 充塡하였다. 4,7,10,15 時間의 네가지 체류시간과 292, 674, 1300㎎/ℓ COD의 세가지 유기물 농도에 대하여 각각 실험하였다. 유기물 負荷 1.6-1.9㎏ COD/㎥·day에서 90%이상의 處理效率을 보여주었는데 充塡塔의 마무리효과는 一段 瀑氣槽의 배출류를 기준으로 約 70%를 나타내었다. 슬러지 發生率은 gCOD 當 0.21∼0.31g으로 다른 공정에 비하여 낮았으며, 廢슬러지의 SVI는 최적 負荷에서 26.2-36.6이었다. A new dual biological reactor system for wastewater treatment was developed by combining CSTR and PBR. A circular tank of 4.16 liters with a concentric draft tube was used for the first stage and a column of 1.84 liters packed with Raschig rings was vertically attached. By arranging two reactors in one column, it is unnecessary to install a separate sludge settler for recycle. The process was operated with various combinations of four retention times (4, 7, 10, 15 hours) and three organic concentrations (292, 675, 1300 ㎎/liter COD) with synthetic sewage. It was found that the process was capable of removing more than 90% of COD under organic loadings of 1.6 to 1.9 ㎏ COD/㎥·day. Results for polishing in PBR showed that about 70% of the influent COD from CSTR was removed and the effluent SS was maintained less than 30 ㎎/liter. The sludge yield was 0.21 to 0.31 g SS/g COD removed, and the SVI for an optimumorganic loading was in the range 26.2 to 36.6.