电渗析技术进展.doc

电渗析技术进展 学院：轻化与环境工程学院 班级：环科11-2 姓名：张超 学号：201105011079Progress electrodialysis Abstract: electrodialysis membrane separation technology are widely used in food, chemical, waste water treatment and other industries of the separation and purification of the production process, high efficiency, clean and economical energy saving. This paper describes the types of electrodialysis technology, focuses on the principle of electrodialysis technology, introduces electrodialysis technology in the food industry as well as applied research in wastewater treatment, and the prospects of its development prospects. Keywords: electrodialysis; film; Application Electrodialysis is under the effect of external electric field, the use of ion-exchange selective membrane permeability, so that ion migration from one part of water to another part of the physical and chemical processes in water. Electrodialysis, is the use of multi-compartment electrodialysis desalination process to achieve the purpose. Main components electrodialysis membrane, electrodes, clamps or the like by a partition, ion-exchange composition. Ion exchange membranes for ions with different charge through sexual selection. Yang membrane allows only cations, anions stop by, overcast membrane only allows anions, cations stop by. Under the influence of an external DC electric field, ions in water as directed migration.Because electrodialysis is composed by multi-compartment, so light ions migrate to the chamber adjacent to concentrate cells, allowing saline water desalination. In the food and pharmaceutical industry, electrodialysis can be used to remove organic ions from the electrolyte solution, whey desalination, desalination sugars and amino acids are more refined application was successful [1]. As a new electrodialysis membrane separation technology, in natural water desalination, seawater concentrated salt, waste water treatment, etc. [2] plays an important role, has bec