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Machine learning techniques for monitoring the sludge profile in a secondary settler tank
Mälardalen University, School of Business, Society and Engineering, Future Energy Center.ORCID iD: 0000-0002-8034-4043
IVL Swedish Environm Res Inst, Stockholm, Sweden.
Uppsala Univ, Sweden.
2019 (English)In: Applied water science, ISSN 2190-5487, E-ISSN 2190-5495, Vol. 9, no 6, article id UNSP 146Article in journal (Refereed) Published
Abstract [en]

The aim of this paper is to evaluate and compare the performance of two machine learning methods, Gaussian process regression (GPR) and Gaussian mixture models (GMMs), as two possible methods for monitoring the sludge profile in a secondary settler tank (SST). In GPR, the prediction of the response variable is given as a Gaussian probability density function, whereas in the GMM the probability density function is built as a weighted sum of Gaussian distributions. In both approaches, a residual is calculated and a fault detection criterion is implemented via a recursive decision rule. As case study, GMM and GPR were tested using real data from a sensor measuring the suspended solids concentration as a function of the SST level in a wastewater treatment plant in Bromma, Sweden. Results suggest that GMM gives a faster response but is also more sensitive than GPR to changes during normal conditions.

Place, publisher, year, edition, pages
2019. Vol. 9, no 6, article id UNSP 146
National Category
Energy Systems
Identifiers
URN: urn:nbn:se:mdh:diva-44975DOI: 10.1007/s13201-019-1018-5ISI: 000476592500001OAI: oai:DiVA.org:mdh-44975DiVA, id: diva2:1341485
Available from: 2019-08-08 Created: 2019-08-08 Last updated: 2019-08-08Bibliographically approved

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Zambrano, Jesus

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