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Combined Water-Oxygen Pinch Analysis with Mathematical Programming for Wastewater Treatment |
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| Authors: | SONG Li-li DU Jian CHAI Shao-bin YAO Ping-jing |
| Affiliation: | School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116012, China;School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116012, China;School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116012, China;School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116012, China |
| Abstract: | Water-oxygen pinch analysis is an effective method to decrease the wastewater quantity and improve the wastewater quality. But when multiple-contaminants are present, the method is difficult to be carried out. In this paper, the method that combines water-oxygen pinch analysis with mathematical programming is proposed. It obtains the general optimal solution and leads to the reuse stream that cannot be found only by pinch analysis. The new method is illustrated by an example, and the annual cost is reduced by 8.43% compared with the solution of literature. |
| Keywords: | water-oxygen pinch analysis wastewater minimization mathematical programming |
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