Automated Control System for Storm Water Treatment Introduced

ProTech General Contracting Services Inc. recently announced the availability of the Company's new control system for stormwater treatment using polymer coagulants for suspended sediment removal.

The control system, based on Streaming Current Detector (SCD) technology, provides real-time automated polymer monitoring and dosage control, with the capability to respond to changes in flow, turbidity, or water chemistry within minutes.

"Precise and accurate coagulant dose is critical for polymer coagulant systems because it eliminates the possibility of overdosing and minimizes coagulant consumption," states Chris Ott, ProTech’s chief technology officer. "SCD control has been used for many years for industrial process control – ProTech has simply adapted the technology to meet the requirements of our stormwater treatment systems. We demonstrated SCD control on several projects last season and it greatly increased reliability, as well as client and regulator confidence, in our systems."

Polymers coagulants and flocculants offer significant improvements in clarification efficiency and effluent water quality for many projects. However, they require precise and accurate dosage control for optimum efficiency, to minimize polymer consumption, and to eliminate potential toxicity due to excess polymer in the effluent. To date, most polymer treatment systems have used simple proportional metering control systems. While these control systems are effective, they do have potential limitations – the most important being that the system operator must monitor and account for variation in suspended sediment levels.

Source: PT