GREEN DESIGN FOR ROTATION-CAGE-TYPE SUSPENDED CARRIERS BIOREACTOR BASED ON MULTIPLE UTITLITY FUNCTION OPTIMIZATION

摘要

The rotation-cage-type suspended carriers' bioreactor is a new environmental improvement device, and it may influence to environment while controlling water environmental pollution, so green design technology is introduced to its design process, which green design can realize its comprehensive balance and overall optimum for anticipated environmental objective utility. In this paper, the environmental impact at every stages of life cycle of rotation-cage-type suspended carriers' bioreactor has been analyzed firstly, and has been found that the material selection, structure design, recycling design, manufacturing are key stages in its life cycle, and the environmental influence of these stages need be controlled. Then the environmental influence utility of the key stages is treated as designing objective, and the multiple utility function groups are established, these are optimization models to improve the designing of rotation-cage-type suspended carriers bioreactor. The optimization models are difficult to solve by using of tradition algorithm, and the genetic algorithm is used to solve these multiple utility function groups, which the genetic algorithm is improved to overcome its shortcoming. The green design based on environmental influence utility function is a new method to quantitatively describe the environmental influence.