Non-Invasive 3D Imaging and Sensor Data-Based Diagnosis of Water Treatment Plant Filter Integrity
Publication: ASCE Inspire 2023
ABSTRACT
As a crucial component of water infrastructure, filtration is an imperative step in water treatment, removing particles to achieve targeted turbidity. Regular inspections of water filters are necessary to identify irregular, curved, or misaligned sections of gravel support and pipes within the filter. These geometric defects can lead to uneven water flow through the filtration layers, resulting in water quality that fails to meet established standards. Traditional filter inspection techniques involve puncturing or excavating the upper layers, can be time-consuming, and may necessitate plant shutdowns, negatively impacting operational efficiency. Aiming at addressing this issue, the authors used 3D laser scanning and time-series sensor data analysis for non-contact inspections, reducing time, costs, and errors associated with conventional field punctures of filtration media. The point clouds and time-series sensor data from six water filters before and after backwash were collected. The authors identified correlations between anomalous geometric change patterns on the surface and hidden geometric defects. Additionally, geometric information from point clouds and sensor data could be mutually interpreted, and uneven backwash processes and water flows caused by subsurface defects can produce irregular 3D geometric changes on the top surface and abnormal sensor data. Filter 2 exhibits higher surface elevations (a bump on one side of the filter surface) than the other five filters. According to the sensory time series analysis, the average production between each backwash of filter 2 is lower than that of the other five filters, Consequently, filter 2 is diagnosed as the outlier among the six filters.
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Information & Authors
Information
Published In
ASCE Inspire 2023
Pages: 932 - 940
History
Published online: Nov 14, 2023
ASCE Technical Topics:
- Construction engineering
- Construction management
- Defects and imperfections
- Design (by type)
- Engineering fundamentals
- Environmental engineering
- Filters
- Filtration
- Geometrics
- Highway and road design
- Inspection
- Materials characterization
- Materials engineering
- Measurement (by type)
- Sensors and sensing
- Water quality
- Water treatment
- Water treatment plants
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