Process Controls for Wastewater Treatment

Custom designed PLC controlled treatment systems including:

• Wastewater Chlorination
• Pumping Stations
• Wastewater/Groundwater Treatment Systems
• Sequential Batch Reactors
• PLC logic control
• VFD motor control or starters
• Start-ups and troubleshooting over the phone
• Construction oversight
• SCADA

H&H has many years of experience in the design of Sequential Batch Reactors (SBRs), groundwater recirculation systems and skids for Soil Vapor Extraction.

Specific designs include a recirculation system for the reduction of chlorinated solvents in contaminated groundwater, using the control of flow and pump pressure. A digital flow meter provides electronic pulse inputs to the onboard PLC.

Soil vapor extraction systems include variable frequency drives for the control of extraction and injection blowers. The onboard PLC controls the on-time and run-hours for each blower.