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A property‐based optimization of direct recycle networks and wastewater treatment processes
Author(s) -
PonceOrtega José María,
Hortua Ana Carolina,
ElHalwagi Mahmoud,
JiménezGutiérrez Arturo
Publication year - 2009
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.11828
Subject(s) - reuse , piping , process (computing) , wastewater , process engineering , computer science , sewage treatment , mathematical optimization , waste management , engineering , environmental engineering , mathematics , operating system
This article presents a mathematical programming approach to optimize direct recycle‐reuse networks together with wastewater treatment processes in order to satisfy a given set of environmental regulations. A disjunctive programming formulation is developed to optimize the recycle/reuse of process streams to units and the performance of wastewater treatment units. In addition to composition‐based constraints, the formulation also incorporates in‐plant property constraints as well as properties impacting the environment toxicity, ThOD, pH, color, and odor. The MINLP model is used to minimize the total annual cost of the system, which includes the cost for the fresh sources, the piping cost for the process integration and the waste stream treatment cost. An example problem is used to show the application of the proposed model. The results show that the simultaneous optimization of a recycle network and waste treatment process yields significant savings with respect to a commonly‐used sequential optimization strategy. © 2009 American Institute of Chemical Engineers AIChE J, 2009