Systematic Procedure to Handle Critical Decisions during the Conceptual Design of Activated Sludge Plants
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- 作者：Xavier Flores ; Ignasi Rodrí ; guez-Roda ; Manel Poch ; Laureano Jimé ; nez ; René ; Bañ ; ares-Alcá ; ntara
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2007
- 出版时间：August 15, 2007
- 年：2007
- 卷：46
- 期：17
- 页码：5600 - 5613
- 全文大小：368K
- 年卷期：v.46,no.17(August 15, 2007)
- ISSN：1520-5045
文摘
This paper presents a systematic procedure that assists the designer of activated sludge plants to make criticaldecisions during the decision making process. By critical decisions we mean those (i) with a great influenceon the overall design process and (ii) involving a set of options that satisfy the design objectives to a similardegree. Decision making for critical decisions is especially difficult when several design objectives (e.g.,environmental, legal, economic, and technical) must be taken into account, i.e., when the evaluation of themost promising options is a multicriteria problem. The systematic procedure consists of three steps: (1)preliminary multiobjective optimization, where the most promising options (those located close to optimumconditions) are compared based on the results of dynamic simulation, (2) identification of the strong andweak points of each option by means of classification trees and the subsequent extraction of rules for eachoption, and (3) evaluation of the tradeoff between the improvement of the criteria identified as weak pointsof the option and the loss of the overall process performance through the integrated application of dynamicsimulation and qualitative knowledge extracted during the design process. The capabilities of this new procedureare demonstrated with a case study where the (bio)reactor of an organic carbon and nitrogen removal plantis redesigned to achieve simultaneous organic carbon, nitrogen, and phosphorus removal. The resultsdemonstrate how the new procedure supports the systematic analysis of critical decisions for activated sludgeplant design