Abstract
Sewage treatment problem is a typical linear programming problem, and can be solved by method of linear programming. In order to reflect the principle of fairness and make full use of self-purification capacity of environment, this paper gives rational analysis of the sewage disposal problems in 2007 Chinese Undergraduate Mathematical Modeling Contest. The mathematical model of linear programming is established, and solved by lingo optimization software. The results show that: by the principle of fairness, investment funds increased; by the principle of self-purification capacity of environment, investment funds decreased. The results can provide guidance for decision makers to choose different scheme.
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