Ultrasonic sensors safeguard environmental protection      

Delta Mobrey helped a leading UK water company to provide a system to detect sludge blanket levels and avoid potential environmental impacts.

The plant now benefits from improved critical level detection, resulting in reduced response time and manual inspection costs, as well as giving the customer environmental peace of mind.

CUSTOMER BENEFITS

• Peace of mind solution for settlement tank sludge level alarm
• Improved response time, reduced need for manual intervention
• Reduced risk of environmental damage penalties

CHALLENGE

Delta Mobrey was asked to assist on the final settlement tank (FST) level monitoring controls at a major wastewater treatment plant. The crucial factor was to ensure sludge would not overflow from the tank to the weir, causing environmental damage.

The existing quality monitors were positioned on shared discharge lines and could not identify which tank handled any accidental sludge discharge.

Continuous effluent control was managed through manual intervention and monitoring; therefore, an improved sludge blanket control process was required.

SOLUTION

Following our review of the site, each FST was fitted with a gap sensor and control unit. These were mounted on the rotating bridge, with the sensor positioned a meter below the supernatant.

The ultrasonic signal from the sensor easily passes through the clear water but is highly attenuated by sludge. Ultrasonic gap sensors have proven to be accurate trouble-free controls for practical applications where alternative technologies require regular attention.

This system therefore provides an ideal solution to detect increasing sludge levels, trigger alarms, and ensure preventative action to safeguard the environment.

Delta Mobrey Ultrasonic Point Level Sensor 433SD

• Wastewater sludge can be measured up to 29% undissolved solids
• Industrial slurries can be measured up to 60% undissolved solids

 

 

 

 

 

 Application of 433SD Sensors inserted in a

settlement tank with MCU200 Controllers.

Delta Mobrey Industrial Control Unit 200 Series

• Simple and cost-effective control electronics
• Three LED indicators for Normal, Alarm, and Fault
• Continuous cable check

Learn more about the MCU 200 Series