A flocculation tensor to monitor water quality using a deep learning model

Guocheng Zhu*, Jialin Lin, Haiquan Fang, Fang Yuan, Xiaoshang Li, Cheng Yuan, Andrew S. Hursthouse*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

The increasing quantities of polluted waters are calling for advanced purification methods. Flocculation is an essential component of the water purification process, yet flocculation is commonly not optimal due to our poor understanding of the flocculation process. In particular, there is little knowledge on the mechanisms ruling the migration of pollutants during treatment. Here we have created the first tensor diagram, a mathematical framework for the flocculation process, analyzed its properties with a deep learning model, and developed a classification scheme for its relationship with pollutants. The tensor was constructed by combining pixel matrices from a variety of floc images, each with a particular flocculation period. Changing the factors used to make flocs images, such as coagulant dose and pH, resulted in tensors, which were used to generate matrices, that is the tensor diagram. Our deep learning algorithm employed a tensor diagram to identify pollution levels. Results show tensor map attributes with over 98% of sample images correctly classified. This approach offers potential to reduce the time delay of feedback from the flocculation process with deep learning categorization based on its clustering capabilities. The advantage of the tensor data from the flocculation process improves the efficiency and speed of response for commercial water treatment.
Original languageEnglish
Pages (from-to)3405-3414
Number of pages10
JournalEnvironmental Chemistry Letters
Volume20
DOIs
Publication statusPublished - 30 Sep 2022

Keywords

  • flocculation
  • tensor
  • tensor diagram
  • deep learning model

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