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Long-term scheduling technique for wastewater minimisation in multipurpose batch processes
Dissertation (MEng)--University of Pretoria, 2011.
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| Format: | Thesis |
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University of Pretoria
2013
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| _version_ | 1867613450414325760 |
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| access_status_str | Open Access |
| author2 | Majozi, Thokozani |
| author_browse | Majozi, Thokozani |
| author_facet | Majozi, Thokozani |
| collection | Thesis |
| dc_rights_str_mv | © 2011, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MEng)--University of Pretoria, 2011. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/30973 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:36:20.438Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/30973 Long-term scheduling technique for wastewater minimisation in multipurpose batch processes Majozi, Thokozani donald@tuks.co.za Nonyane, Donald Robert UCTD Dissertation (MEng)--University of Pretoria, 2011. Most of the methodologies published in literature on wastewater minimisation for batch processes are based on short-term scheduling techniques. When these methods are applied to longer time horizons, the computational time becomes intractable, hence the focus of this thesis. This thesis presents a methodology for simultaneous optimization of production schedule and wastewater minimisation in a multipurpose batch facility. The key feature of the presented methodology is the adaption of cyclic scheduling concepts to wastewater minimisation. The methodology is developed based on continuous-time formulation and the state sequence network (SSN) representation. The methodology is successfully applied to two common literature examples and an industrial case study to demonstrate its effectiveness. None of the currently published wastewater minimisation techniques could solve the case study for a time horizon of 168h. However, through the application of the presented methodology, a time horizon of 168h for the case study was reduced to 8 cycles with the cycle length of 23h, for which the CPU time for the optimum cycle is 64.53s. Chemical Engineering Unrestricted 2013-09-09T07:54:09Z 2011-09-23 2013-09-09T07:54:09Z 2011-09-06 2011 2011-07-06 Dissertation Nonyane, D 2011, Long-term scheduling technique for wastewater minimisation in multipurpose batch processes, MEng dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://upetd.up.ac.za/thesis/available/etd-07062011-205931/ > C11/9/137/hv http://hdl.handle.net/2263/30973 http://upetd.up.ac.za/thesis/available/etd-07062011-205931/ © 2011, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | UCTD Long-term scheduling technique for wastewater minimisation in multipurpose batch processes |
| title | Long-term scheduling technique for wastewater minimisation in multipurpose batch processes |
| title_full | Long-term scheduling technique for wastewater minimisation in multipurpose batch processes |
| title_fullStr | Long-term scheduling technique for wastewater minimisation in multipurpose batch processes |
| title_full_unstemmed | Long-term scheduling technique for wastewater minimisation in multipurpose batch processes |
| title_short | Long-term scheduling technique for wastewater minimisation in multipurpose batch processes |
| title_sort | long term scheduling technique for wastewater minimisation in multipurpose batch processes |
| topic | UCTD |
| url | http://hdl.handle.net/2263/30973 http://upetd.up.ac.za/thesis/available/etd-07062011-205931/ |