Design and Evaluation of an Optimal Controller for Simultaneous Saccharification and Fermentation Process Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/sx61dn08m

This is the publisher’s final pdf. The published article is copyrighted by Springer Science and can be found at:  http://www.springer.com/.

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Ethanol from corn is produced using dry grind corn process in which simultaneous saccharification and fermentation (SSF) is one of the most critical unit operations. In this work an optimal controller based on a previously validated SSF model was developed by formulating the SSF process as a Bolza problem and using gradient descent methods. Validation experiments were performed to evaluate the performance of optimal controller under different process disturbances that are likely to occur in practice. Use of optimal control algorithm for the SSF process resulted in lower peak glucose concentration, similar ethanol yields (13.38 +/- 0.36% v/v and 13.50 +/- 0.15% v/v for optimally controlled and baseline experiments, respectively). Optimal controller improved final ethanol concentrations as compared to process without optimal controller under conditions of temperature (13.35 +/- 1.28 and 12.52 +/- 1.19% v/v for optimal and no optimal control, respectively) and pH disturbances (12.65 +/- 0.74 and 11.86 +/- 0.49% v/v for optimal and no optimal control, respectively). Cost savings due to lower enzyme usage and reduced cooling requirement were estimated to be up to $1 million for a 151 million L/yr (40 million gal/yr) dry grind plant.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Murthy, G. S., Johnston, D. B., Rausch, K. D., Tumbleson, M. E., & Singh, V. (2012). Design and evaluation of an optimal controller for simultaneous saccharification and fermentation process. Applied Biochemistry and Biotechnology, 166(1), 87-111. doi: 10.1007/s12010-011-9406-9
Academic Affiliation
Series
Keyword
Rights Statement
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2012-11-07T22:40:36Z (GMT). No. of bitstreams: 1 MurthyGantiSBiologicalEcologicalEngineeringDeisgnEvaluationOptimal.odf.pdf: 700176 bytes, checksum: bef3a1ae5ac580c0ac6d1a50870da545 (MD5) Previous issue date: 2012-01
  • description.provenance : Submitted by Deborah Campbell (deborah.campbell@oregonstate.edu) on 2012-11-07T21:23:25Z No. of bitstreams: 1 MurthyGantiSBiologicalEcologicalEngineeringDeisgnEvaluationOptimal.odf.pdf: 700176 bytes, checksum: bef3a1ae5ac580c0ac6d1a50870da545 (MD5)
  • description.provenance : Approved for entry into archive by Deborah Campbell(deborah.campbell@oregonstate.edu) on 2012-11-07T22:40:36Z (GMT) No. of bitstreams: 1 MurthyGantiSBiologicalEcologicalEngineeringDeisgnEvaluationOptimal.odf.pdf: 700176 bytes, checksum: bef3a1ae5ac580c0ac6d1a50870da545 (MD5)

Relationships

In Administrative Set:
Last modified: 07/13/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items