Research And Analysis On The Effect Evaluation Of Membrane Technology In Treatment Of Electroplating Wastewater

Electroplating has an important role in national economy and it is an indispensable component in the process of production in most industries.However,at tge sane time electroplating industry is one of the three heavily polluting industries in the world today.If the untreated electroplating wastewater freely releases into the nature,it will bring great harm to the environment.Therefore,the recycling of heavy metal and reusing of wastewater in electroplating are imperative.At present there are many technologies to deal with electroplating wastewater, but most have their own defects.Membrane as a new treating electroplating wastewater Technology provides a "green" solution for treating electroplating wastewater,which has get widely research and unprecedented development.However, the using membrane and membrane module in treating electroplating wastewater is lack of mature technical experience in domestic.And there is also lack of theoretical research on the evaluation of membrane technology applied in the field of electroplating wastewater.Therefore,this thesis tries to conduct a comprehensive, accurate and reasonable evaluation of the effect of membrane module device used in the process of reusing and recycling of heavy metal and wastewater of electroplating, which also has a good referenced effect in the dealing with the recycle of electroplating wastewater with membrane technology and the effect evaluation at home.It is also good for the standard of membrane technology as well as has an important practical significance on research of metal recycle and the controlling, dealing and reusing of wastewater in Electroplating.This paper based on the basic principles of selecting a comprehensive index system,and using theoretical and expert analysis to establish a comprehensive evaluation index system including three levels,4 sub-systems and the 15 objectives from the view of technique-economy-society-environment.Then calculate and determine the weights of each index using the method of AHP with MATLAB software and introduce the fuzzy comprehensive evaluation method into the comprehensive evaluation of the effect of membrane technology in electroplating wastewater treatment.Finally,take the company which uses membrane provided and studied by the Xiamen" green technology" company as an example to carry out empirical research.Finally,the result is that the fuzzy membership of the company is"0.54",which belongs to the range of "very good" state.Compared with the practical operation,the project was check by the Environmental monitoring station of Xiamen city,and get the conclusion is that each index meets National Institute of Standards and project contracts.Because of the economic cost of the membrane technique is relatively higher,the sub-system of economic capability belongs to "good" state.So considering the economic cost,this technology has not been in "very good" state.However,as the further development of membrane technology as well as the further improvement of each technical capability and a decline in prices,this technology will be in a "very good" stage in the near future.