Safer Effluent Treatment - METTLER TOLEDO

Safer Effluent Treatment

Turbidity sensorTurbidity measurement is important for monitoring flocculant treatment of wastewater. Inefficient use can result in contaminants entering drainage systems. A backscatter turbidity solution monitors use of flocculants at a brewery effluent treatment plant, ensuring correct dosing and increasing throughput.

Use of flocculants in wastewater treatment is important for eliminating contaminants. Flocculants improve the sedimentation or filterability of small particles in the waste stream, and thereby ease their removal. Flocculation also allows a reduction in process time, which means wastewater can be treated faster so throughput can be increased.

In recent times, naturally-based flocculants that produce environmentally benign floc are becoming increasingly popular, as this helps to reduce disposal costs.

Turbidity
A UK brewery was looking for a way to monitor the levels of flocculants added to wastewater so that it could be dosed correctly and prevent wasteful over-dosing and potentially ineffective under-dosing. The turbidity sensor would also be used to monitor the efficacy of the flocculants to ensure they were producing the desired effect.

Turbidity is the ideal measurement for this application as the resulting flocs from turbid sediments can easily be measured using backscatter turbidity techniques. METTLER TOLEDO backscatter sensors have a wide measurement range that provides great application flexibility. In addition, the low maintenance and robust turbidity sensors are beneficial for use in continuous and often unmanned processes, such as effluent treatment plants.

Low-maintenance solution
The brewery required a sensor suitable for medium to high levels of total suspended solids that could be retracted from a pipe installation. This would allow easy sensor cleaning without process interruption.

The METTLER TOLEDO solution comprised the InPro 8200 turbidity sensor, InTrac 779e retractable housing and M800 transmitter. The InPro 8200 sensor is a dual optical fiber turbidity sensor that is designed for a wide variety of industrial applications, including liquid/solid separation. Due to the nature of the customer’s process, it was important that the sensor be resistant to fouling and easy to maintain. The InPro 8200 was therefore a wise choice as it requires little maintenance and has a uniform structure
that reduces fouling on its scratch-resistant sapphire window. This prevents build-up of contaminants, ensuring error-free measurement.

Combined with the InTrac 779e retractable housing complete with flushing connections, the customer is able to retract the sensor at regular intervals and perform cleaning or calibration of the sensor without stopping the process.

Reduced costs
By installing the METTLER TOLEDO system, the brewery is now able to monitor the dosing of flocculants with precision and ease. This has helped reduce costs as only the necessary amount of flocculant is added. Subsequently, the process has become more efficient as throughput of the effluent treatment plant can now be increased.

If you want to reduce your effluent treatment costs, visit:
Turbidity Meters / Turbidity Sensors

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