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This research aims to develop a new method for monitoring the mud-water interface in urban sewage treatment using ultrasonic technology.

July 26, 2026PLoS ONEOpen Access

Measurement of sludge-water interface based on adjustable peak point of ultrasonic echo energy

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Randomized trial examines sludge-water interface monitoring in urban sewage systems, suggesting improved detection methods.

This research aims to develop a new method for monitoring the mud-water interface in urban sewage treatment using ultrasonic technology.
Analyzed existing limitations of ultrasonic sludge interface instruments.
Developed a method utilizing an array ultrasonic system with median value average filtering and interval maximum method.
Conducted tests at Beijing Ma-Fang Sewage Treatment Plant using a high-precision ultrasonic probe.
Achieved measurement accuracy with a mean deviation of less than 2%.
Obtained precision variance below ±0.02 m.
Demonstrated greater robustness against noise in turbid environments compared to conventional methods.

Li et al. (2026) studied this question.

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