"The products are very quick and easy to install, which enables us to give customers delivery and implementation times with a great deal of confidence, something we do not believe we would get with any other telemetry unit.”
Managing Director – Customer
Wastewater quality monitoring is a pressing issue motivated by the increasing environmental and societal need for cleaner water and to comply with legal requirements. It is essential that treated water when released into the environment is does no harm. This can only be achieved by accurately monitoring the various parameters that are critical to the water treatment process. These parameters include dissolved oxygen levels, pH, nitrate levels, ammonia levels, and suspended solids. Traditionally these are assessed using remote sampling and laboratory analysis.
While sampling and laboratory analysis provides valuable data, there is a significant time delay in the process. The method provides snapshots of the wastewater quality, so there is a considerable risk of rapid quality deterioration between these snapshots. Also, as there are significant gaps in the data, crucial information is likely to be missed.
The solution is continual monitoring of wastewater quality. Quality is assessed using various sensors including biosensors, optical sensors and sensor arrays. Sensor outputs are connected to a remote telemetry unit and transmitted to a base station. All data is stored for future analysis and events in which parameters drift away from permitted levels trigger alarms calling for action.
HOW DOES THE METASPHERE
Metasphere’s monitoring systems based on the Point Colour range can take input from any sensor used to monitor wastewater quality; Inputs may be digital, analogue (4-20mA) or serial (Modbus RS232/485/SDI-12). Data is returned to either:
- Metasphere’s data visualisation service, Palette, where users can view the received data or make use of both the email and SMS alarm functionality.
- Client’s FTP or DNP3 servers, where subsequent alarms can be generated by the user or data can be used to perform control functions.
Should any readings fall outside the range of pre-set parameters, alarm situations are triggered automatically to alert system operators of immanent problems. Long term trends can also be analysed to identify the risk of potential failures.