A mathematical optimisation approach for wastewater minimisation in multipurpose batch plants: Multiple contaminants

This paper presents a methodology for wastewater minimisation in multipurpose batch plants characterised by multiple contaminant streams. Firstly a situation in which central reusable water storage does not exist is considered. In this case, water from one operation is directly reused in another ope...

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Published in:Computers & chemical engineering 2009-11, Vol.33 (11), p.1826-1840
Main Authors: Majozi, Thokozani, Gouws, Jacques F.
Format: Article
Language:English
Subjects:
Batch
Chemical engineering
Contaminants
Mathematical models
Methodology
Multiple contaminants
Optimisation
Optimization
Reusable
Scheduling
Waste water
Wastewater minimisation
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description This paper presents a methodology for wastewater minimisation in multipurpose batch plants characterised by multiple contaminant streams. Firstly a situation in which central reusable water storage does not exist is considered. In this case, water from one operation is directly reused in another operation as long as the source and sink operations, respectively, end and begin simultaneously. Secondly, the case with central reusable water storage is considered. In this case water from a source operation can temporarily be stored in dedicated storage before use by the sink process. The methodology is based on an existing scheduling framework which then makes it possible to generate the required schedule to realise the absolute minimum wastewater generation for a problem. The methodology involves a two-step solution procedure. In the first step the resulting MINLP problem is linearised and solved to provide a starting point for the exact MINLP problem.
doi_str_mv 10.1016/j.compchemeng.2009.06.008
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source ScienceDirect Journals
subjects Batch
Chemical engineering
Contaminants
Mathematical models
Methodology
Multiple contaminants
Optimisation
Optimization
Reusable
Scheduling
Waste water
Wastewater minimisation
title A mathematical optimisation approach for wastewater minimisation in multipurpose batch plants: Multiple contaminants
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