Application Of Value Engineering In Scheme Selection Of Sewage Treatment Process

Serious pollution of water resources, and vigorously to build a sewage treatment plant is an effective way to solve this problem. Sewage treatment process selection for the sewage treatment plant construction program has played a very important role, which affects the investment scale sewage treatment plant operating costs, water effects, operating management. However, China's sewage treatment process than election still in a relatively early stage, selected with respect to the various programs tend subjective awareness scoring, selected with great randomness. Will take the initiative in the choice of programs tend to their favorite programs, and it is possible to ignore the shortcomings of the program, not the fairness of the selection of programs. So the sewage treatment process selection please consider the advantages of various aspects of the management process solutions, economic, technological, etc., is composed of many interrelated, a complex system of interacting factors posed, it is difficult for a single objective function to be evaluated. How to use the scientific method to the sewage treatment process scheme is preferably a urgent need to address the issue.Value engineering is the least cost in exchange for the basic idea of the functionality required to improve the economic efficiency of industrial enterprises as the goal, from the rational use of resources began to develop a soft science technology, combined from both the technical and economic point of view to study how to improve the value of products, systems or services, to reduce costs in order to achieve good economic returns, we are seeking the best technical and economic benefits of a practical and effective method or a technical theory. Analytic Hierarchy Process according to "the overall goal, sub-goals of each layer, the evaluation criteria to a specific order options will be divided into different decision problem hierarchy, and then solving the judgment matrix eigenvectors method calculated for each element on every level a priority level of a heavy element, alternatives to the final weight of the total target weight using the weighted and normalized hierarchical method calculates the weight of the largest person, is the optimal solution. " Value engineering is a core function evaluation, scoring easily for functional analysis of interference by subjectivity and arbitrariness, AHP uses a real symmetric matrix calculations determine the weight of each factor, and consistency checks, can be a good eliminate arbitrary scoring to make up for past deficiencies empirically Schemes.This paper considers the general characteristics of fully carrying out aspects of the process of sewage treatment, using the analytic hierarchy process of the method and the value of the project, and choose the best option scheme were compared to study. First, select relationship sewage treatment process to the sewage plant scale of investment, operation, management and other aspects, therefore, for the construction of sewage plants, the choice of program's main sewage treatment process selection. Secondly, according to the characteristics of the sewage treatment process of wastewater treatment and process selection principles, combined with the choice of selecting capable of sewage treatment programs influence factors, and thus the sewage treatment process evaluation system were successfully constructed. Finally, the functional hierarchy model of value engineering and AHP combined in the analysis and evaluation of the program, can give qualitative and quantitative analysis, value engineering to overcome the randomness, it can be a good evaluation of the program.