Abstract:
본 발명은 수중오염물질을 제거 처리하기 위한 고정화 이산화티탄 광촉매의 제조방법에 관한 것으로서, 더욱 상세하게는 나노크기의 이산화티탄 분말을 수중에서 음이온성 분산제로 분산안정화시키고, 이를 중공형 또는 다공성의 무기담체에 실리콘계 또는 알루미나계 바인더로 부착시켜 만든 고정화된 이산화티탄 광촉매의 제조방법에 관한 것이다. 상기의 방법으로 제조된 광촉매를 수처리장치에 적용함으로써 광촉매를 회수하기 위한 별도의 분리장치가 필요없고, 동시에 광촉매의 분산으로 인한 균일한 광조사 효과를 얻을 수 있어 경제적이면서도 대용량으로 확장이 용이하다.
Abstract:
PURPOSE: To provide a superior photocatalyst which can be reused by adding boracic acid and sodium ethoxide, thereby improving immobilization force of titanium dioxide and media, a water treatment apparatus for further improving efficiency of the photocatalyst by easily discharging purified treated water, and a water treatment method using the photocatalyst. CONSTITUTION: In a water treatment apparatus comprising a hollow reactor (10) having a certain volume, a raw water inflow pump (22) for flowing raw water in the reactor, and a transfer pump (26) for transferring treated water from the reactor, the water treatment apparatus using immobilized photocatalyst comprises a cylindrical rotary screen (12) vertically arranged in a central part inside the reactor in such a way that the rotary screen is rotated; vanes (18) attached to upper and lower end parts of the rotary screen; a variable motor (20) connected to a hollow rotary shaft by pulley and belt to provide the rotary screen with rotary force, wherein the hollow rotary shaft is integrally attached to an upper part of the rotary screen; a plurality of ultraviolet lamps (14) vertically arranged between the inner wall of the reactor and the rotary screen; and a pair of air lift pumps (16) communicatingly connected to the reactor, wherein the treated water is transferred by the transfer pump as the treated water is passing through the hollow rotary shaft in an upper part of the rotary screen from the rotary screen.
Abstract:
본 발명은 재활용되는 제지 공정수의 칼슘 경도 조절방법에 관한 것으로서, 더욱 상세하게는 제지공정에서 단기순환되는 백수(White Water)에 탄산나트륨 또는 탄산수소나트륨을 첨가하여 공정수내의 칼슘이온을 탄산칼슘으로 침전시켜 제거하므로써 칼슘 경도를 조절하며, 또한 탄산칼슘 침전물을 제거함에 있어서는 부상부유처리법을 수행하고 이러한 침전물 제거공정후에도 미처 제거되지 않은 탄산칼슘은 지필에 보류시켜 초지계로부터 배출시킴으로써 공정수 재활용에 따른 칼슘 스케일 및 지방산 칼슘염의 발생을 미연에 방지하며 탄산칼슘 제거과정에서는 미세분도 함께 제거하여 탈수성을 개선하고 제지용 고분자 첨가제의 효율을 향상시키는 효과가 있을 뿐만 아니라 아울러 공정수를 폐쇄화시킴에 따라 폐수 배출로 비롯되는 환경오염을 줄� �고, 공정수 및 계 내에 투입된 에너지를 절약하면서 제지용 첨가제와 주원료인 섬유의 유출을 방지하게 되는 재활용되는 제지 공정수의 칼슘 경도 조절방법에 관한 것이다.
Abstract:
PURPOSE: A method for controlling calcium hardness in paper manufacturing process is provided, which is characterized in that sodium carbonate or calcium hydro carbonate is added to white water to settle calcium ion. CONSTITUTION: Silo white water which is shortly circulated is purified by settling calcium ions, and the calcium carbonate ions are absorbed. Carbonate ion and sulfate ion react with calcium ion and produce precipitate. Sodium ion which replaces calcium ion does not react with other ions and does not produce scales in the water. The precipitates can be removed by using a sedimentation chest, but because the sedimentation chest requires an extra device for neutralizing, a floating method is appropriate. Carbon dioxide which replaces air can remove calcium carbonate and control the concentration of hydrogen ions.
Abstract:
PURPOSE: Disclosed is a chelate resin for adsorption of heavy metals. CONSTITUTION: The chelate resin is prepared by the continuous polymerization process by the polymerization and hydrolysis step of stylene and carboxylic acid monomer and divinyl benzene and the hydrolysis and addition step of a (O=P) functional group in side chain of copolymer resin. The chelate resin is represented by the formula I where M represents H, Na, and K, n is 0 or 1, in case z is 0, x and y is 1, in case z is 1, x is 0 and y is 1.