Use of modelling to evaluate best control practice for winery-type wastewaters

Batstone, D. J. and Steyer, J. P. (2007). Use of modelling to evaluate best control practice for winery-type wastewaters. In: R. Chamy, G. Ruiz and M. Carballa, Water Science and Technology. Sustainable Viticulture: Winery Wastes and Ecological Impact Management. 4th International Specialized Conference on Sustainable Viticulture: Winery Wastes and Ecological Impact Management, Vina del Mar, Chile, (147-152). 5-8 November, 2006. doi:10.2166/wst.2007.483


Author Batstone, D. J.
Steyer, J. P.
Title of paper Use of modelling to evaluate best control practice for winery-type wastewaters
Conference name 4th International Specialized Conference on Sustainable Viticulture: Winery Wastes and Ecological Impact Management
Conference location Vina del Mar, Chile
Conference dates 5-8 November, 2006
Proceedings title Water Science and Technology. Sustainable Viticulture: Winery Wastes and Ecological Impact Management   Check publisher's open access policy
Journal name Water Science and Technology   Check publisher's open access policy
Place of Publication London
Publisher IWA Publishing/Portland Press
Publication Year 2007
Sub-type Fully published paper
DOI 10.2166/wst.2007.483
ISBN 1843396009
9781843396000
ISSN 0273-1223
Editor R. Chamy
G. Ruiz
M. Carballa
Volume 56
Issue 2
Start page 147
End page 152
Total pages 6
Collection year 2008
Language eng
Abstract/Summary Winery wastewaters are high strength, and readily biodegradable, making them perfect for application of anaerobic digestion. However, inherent buffering against pH changes also requires some process knowledge and monitoring. They are therefore an important target for anaerobic process control. This has had limited application, but is emerging as an important research and development area. In this paper, we evaluate the use of model-based control analysis of a heavily loaded vinasse-fed reactor. Two controllers – both proportional-integral (PI) – on total volatile fatty acids (VFA) (<500 mg/L), alkalinity (VFA/Total Alkalinity < 0.2) were evaluated in a fitted model, against the actual control mechanism used, which was model-based adaptive control. The two controllers were both less aggressive than the adaptive controller, producing less gas overall, but also using more caustic for pH control. The controllers were also evaluated against their ability to deal with noise, as PI controllers are relatively poor for controlling non-linear processes. The VFA controller was very poor with noise added, proving difficult to tune, and oscillatory. The alkalinity controller was effective with moderate detuning. This emphasizes the need to use effective controller inputs, when applying simple, linear controllers. Overall, use of a model was an effective method to evaluate the different controllers in a competitive way, in a standardized environment.
Subjects C1
291199 Environmental Engineering not elsewhere classified
779999 Other
Keyword Anaerobic
control
linear controller
model
model based analysis
noise
Q-Index Code C1
Q-Index Status Confirmed Code

 
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Created: Wed, 26 Mar 2008, 11:29:43 EST by Suzanne Read on behalf of Advanced Water Management Centre