Water and Wastewater Chemical Management

Objective

To provide an automated way to use existing data on chemical tank levels, and dosing flow rates where available, to measure the chemical use and actual applied dose rates at multiple sites for multiple different chemicals.

Details

15-minute raw data from the corporate SCADA/telemetry system is passed to the Meniscus platform where algorithms are used to derive the chemical consumption from changes in the tank levels.

Issues such as data collection and communication problems generate spurious reading such as negative values,  zeros or constant small increases/decreases in tank levels caused by sensor resolution errors. These data issues mean that simple rates of change calculations overestimate consumption. Experience has shown that  these simplified rates of change calculations are not suitable in practice to cope with real life data.

MAP allows the use of more complex algorithms to overcome these issues so that calculated consumption values more accurately match actual values. Once accurately calculated consumption data is available then a range of additional metrics calculates the actual dose rates and generates the High and Low alerts to identify if specific chemical use if higher or lower than expected for the particular operation conditions at the site being monitored.

Benefits of using MAP

MAP provides the flexibility to apply any calculation to any set of raw data. In this case, this flexibility offers the user the ability to apply more complex algorithms to accurately calculate chemical consumption values. This solution has helped to reduce the workload on the company’s process scientists who previously manually calculated these figures.