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Journal articles
Open Access
Predictive advisory solutions for chemistry management, control, and optimization, TAPPI Journal March 2025

ABSTRACT: Process runnability and end-product quality in paper and board making are often connected to chemistry. Typically, monitoring of the chemistry status is based on a few laboratory measurements and a limited number of online specific chemistry-related measurements. Therefore, mill personnel do not have real-time transparency of the chemistry related phenomena, which can cause production instability, including deposition, higher chemical consumption, quality issues in the end-product and runnability problems. Machine learning techniques have been used to establish soft sensor models and to detect abnormalities. Furthermore, these soft sensors prove to be most useful when combined with expert-driven interpretation. This study is aimed at utilizing a hybrid solution comprising chemistry and physics models and machine learning models for stabilizing chemistry-related processes in paper and board production. The principal idea is to combine chemistry/physics models and machine learning models in a fashion close to white box modeling. A cornerstone in the approach is to formulate explanations of the findings from the models; that is, to explain in plain text what the findings mean and how operational changes can mitigate the identified risks. The approach has been demonstrated for several different applications, including deposit control in the wet end, both raw water treatment and usage, and wastewater treatment. This approach provides mill personnel with knowledge of identified phenomena and recommendations on how to stabilize chemistry-related processes. Instead of using close to black box machine learning models, a hybrid solution including chemistry/physics models can enhance the performance of artificial intelligence (AI) deployed systems. A successful way of gaining the trust from mill personnel is by creating a plain text explanation of the findings from the hybrid models. The correlation between the likelihood of a phenomena and disturbance and the explanations are derived and validated by application and chemistry and physics experts.

Journal articles
Open Access
Advanced wet-end system with carboxymethyl-cellulose, Solutions! & TAPPI JOURNAL, May 2004, Vol. 3(5) (134KB)

Advanced wet-end system with carboxymethyl-cellulose, Solutions! & TAPPI JOURNAL, May 2004, Vol. 3(5) (134KB)

Journal articles
Open Access
Coating layer formation in dry surface treatment of paper substrates, Solutions! & TAPPI JOURNAL, May 2004, Vol. 3(5) (381KB)

Coating layer formation in dry surface treatment of paper substrates, Solutions! & TAPPI JOURNAL, May 2004, Vol. 3(5) (381KB)

Journal articles
Open Access
Confined shear dilution of a nylon fiber suspension, Solutions! & TAPPI JOURNAL, November 2004, Vol. 3(11) (278KB)

Confined shear dilution of a nylon fiber suspension, Solutions! & TAPPI JOURNAL, November 2004, Vol. 3(11) (278KB)

Journal articles
Open Access
The sintering tendency of recovery boiler precipitator dust, Solutions! & TAPPI JOURNAL, October 2004, Vol. 3(10) (535KB)

The sintering tendency of recovery boiler precipitator dust, Solutions! & TAPPI JOURNAL, October 2004, Vol. 3(10) (535KB)

Journal articles
Open Access
Recycling potential of bagasse and wheat straw pulps, Solutions! & TAPPI JOURNAL, September 2004, Vol. 3(9) (745KB)

Recycling potential of bagasse and wheat straw pulps, Solutions! & TAPPI JOURNAL, September 2004, Vol. 3(9) (745KB)

Journal articles
Open Access
Prediction of dust composition and amount in kraft recovery boilers, TAPPI JOURNAL & Solutions! March 2005, Vol. 4(3)

Prediction of dust composition and amount in kraft recovery boilers, TAPPI JOURNAL & Solutions! March 2005, Vol. 4(3)

Journal articles
Open Access
Improvement of ASA sizing efficiency using hydrophobically modified and acid-hydrolyzed starches, TAPPI JOURNAL & Solutions! December 2004, (259KB)

Improvement of ASA sizing efficiency using hydrophobically modified and acid-hydrolyzed starches, TAPPI JOURNAL & Solutions! December 2004, (259KB)

Journal articles
Open Access
Chip properties analysis for predicting bleaching agent requirements for TMP pulps,TAPPI JOURNAL & Solutions! December 2004

Chip properties analysis for predicting bleaching agent requirements for TMP pulps,TAPPI JOURNAL & Solutions! December 2004

Journal articles
Open Access
Beating-induced yellowing of tcf- and ecf-bleached pulps alexander, Solutions! & TAPPI JOURNAL, January 2004, Vol. 3(1) (124KB)

Beating-induced yellowing of tcf- and ecf-bleached pulps alexander, Solutions! & TAPPI JOURNAL, January 2004, Vol. 3(1) (124KB)

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