Simple black box models predicting potential control parameters during disturbances to a fluidised bed anaerobic reactor

G C Premier; R Dinsdale; A J Guwy; F R Hawkes; D L Hawkes; Steven Wilcox

doi:10.1016/S0273-1223(97)00527-1

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Simple black box models predicting potential control parameters during disturbances to a fluidised bed anaerobic reactor

Journal article

Peer reviewed

Simple black box models predicting potential control parameters during disturbances to a fluidised bed anaerobic reactor

G C Premier, R Dinsdale, A J Guwy, F R Hawkes, D L Hawkes and Steven Wilcox

Water Science and Technology, Vol.36(6-7), pp.229-237

1997

DOI: https://doi.org/10.1016/S0273-1223(97)00527-1

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Abstract

Anaerobic digestion

Identification

Linear models

On-line measurement

Prediction

Models of the anaerobic digestion process which predict digester behaviour sufficiently accurate could be used in process control. Although the process is generally considered to be non-linear, it could possibly be represented by an adaptive linear model, where the model adapts rapidly enough to represent the process at differing operating conditions and times in its operating life. Simple linear black box models of low order were investigated, predicting over a limited horizon and relying on current and recent data values to refine the prediction. Independent black box ARX models were identified for gas production rate, % CO2, bicarbonate alkalinity and Total Organic Carbon using on-line data from a fluidised bed reactor at varying organic load. Model predictions looked ahead one sample step (30 minutes) and when validated using data obtained in a different time period (separated by 4-8 weeks) gave significant predictions in each case. All the models consisted of only second or third order polynomials. The non-linear nature of the process was found to have little effect over the operating conditions investigated. Also the variation of the process within a 4-8 week period was not sufficient to cause the models to predict badly.

Details

Title: Simple black box models predicting potential control parameters during disturbances to a fluidised bed anaerobic reactor
Authors: G C Premier (Author) - University of Glamorgan
R Dinsdale (Author) - University of Glamorgan
A J Guwy (Author) - University of Glamorgan
F R Hawkes (Author) - University of Glamorgan
D L Hawkes (Author) - University of Glamorgan
Steven Wilcox (Author) - University of Glamorgan
Publication details: Water Science and Technology, Vol.36(6-7), pp.229-237
Publisher: I W A Publishing
Date published: 1997
DOI: 10.1016/S0273-1223(97)00527-1
ISSN: 0273-1223; 0273-1223
Organisation Unit: Office of the Deputy Vice-Chancellor (Academic); University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99513907002621
Output Type: Journal article

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