Industry
Wastewater
Sewage transfer, effluent dosing, and biosolids handling systems.
Wastewater applications demand corrosion-resistant materials, reliable duty/standby arrangements, and pump protection systems that operate continuously with minimal intervention.
Industry Challenges
What makes wastewater applications demanding
Corrosive fluid chemistry
Sewage and effluent contain hydrogen sulphide, chlorides, and organic acids that aggressively attack pump internals and pipework.
Continuous operation requirements
Wastewater pumping stations often operate 24/7. Unplanned downtime creates regulatory compliance risks and environmental incidents.
Rag and solids ingestion
Municipal sewage contains fibrous material and solids that block impellers and damage mechanical seals.
Variable inflow conditions
Flow rates vary significantly between dry and wet weather. Fixed-speed pumps waste energy and cause excessive wear under part-load conditions.
Duplex duty/standby pump skid — typical wastewater transfer arrangement
RDJ Engineering Solutions
How we solve these problems
Corrosion-resistant material selection
316 stainless steel wetted components, EPDM or Viton sealing, and epoxy-coated external surfaces for extended service life in aggressive environments.
Components involved
Duty / Standby pump arrangement
Duplex pump skids with automatic duty/standby changeover ensure continuous operation during maintenance and pump failure events.
Components involved
Pump inlet protection
Duplex basket strainers with transfer valve allow online cleaning without interrupting pumping operations.
Components involved
VFD speed control
Variable frequency drives match pump output to actual inflow demand, reducing energy consumption by up to 40% and extending seal and bearing life.
Components involved
Odour and noise control
Acoustic enclosures and sealed vent connections for installations adjacent to residential areas or confined underground pump stations.
Components involved
Remote monitoring
Modbus RTU or BACnet communications from flowmeters, pressure transmitters, and the control panel for SCADA integration.
Components involved
Request a system for your application
Describe your process requirements and we will prepare a detailed pump skid scope and indicative budget.