Applications of automation optimize wastewater systems by maximizing operational efficiency, reducing energy and chemical costs, and ensuring regulatory compliance, thereby benefiting the community, the environment, and your bottom line. Wastewater management is a complex process with serious repercussions if not properly controlled. Automation simplifies the process by replacing manual intervention with automated systems.

How Automation Works in a Wastewater System

Wastewater automation starts with a process condition that must remain within a controlled range, such as basin level, dissolved oxygen, flow, pH, or filter pressure. Programmable logic controllers (PLCs) receive signals from field instruments that measure those processes. The PLC compares those inputs against programmed setpoints and sends commands to connected equipment, such as directing pumps to start or slow down, opening or closing valves, increasing airflow, adjusting chemical feed pump dosage, or initiating a backwash sequence.

Supervisory Control and Data Acquisition (SCADA) systems are set above that control layer to collect and display real-time data from PLCs and other field devices. SCADA gives operators a centralized interface for monitoring equipment status, viewing alarms, trending process data, adjusting setpoints, and generating operational records. Depending on the system design, it can also support remote monitoring and reduce routine field checks.

Applications of Automation in Wastewater Systems

The same control path applies across different wastewater processes. The differences are the measured process variable and the controlled equipment.

Some applications of automation in a wastewater system include:

  • Influent flow and pump station control – Automated pump station control keeps flow moving through the collection and treatment system while reducing unnecessary pump starts and manual checks. Level sensors, flow meters, and pressure transmitters monitor wet wells, force mains, and incoming flow conditions. The control system starts, stops, alternates, or stages pumps based on level and demand. When VFDs are used, the system can adjust pump speed instead of cycling equipment on and off, helping maintain flow while reducing mechanical stress and energy use.
  • Aeration control – Automated aeration prevents wasted electricity and improves bacterial digestion. Real-time sensors monitor dissolved oxygen (DO), ammonia, and nitrates. The control system uses variable-frequency drives (VFDs) to control the blower system, adjusting speed and valve positions to deliver the precise amount of oxygen the bacteria need.
  • Chemical dosing – Automated chemical dosing eliminates the safety-margin overdosing of chemicals. Flow meters and sensors track pH, turbidity, and chemical residuals immediately downstream of injection points. Embedded analytics determine the exact amounts of coagulants (e.g., alum, ferric chloride), polymers, or pH adjusters needed, and adjust the dosing pump stroke rates accordingly. This ensures precise contaminant removal and prevents overdosing.
  • Filtration and backwash optimization – Differential pressure sensors monitor filter beds or membranes to gauge clogging and flow restriction. The system automatically triggers backwash cycles, membrane cleaning (CIP), and valve adjustments only when needed, thereby optimizing filter performance and extending equipment lifespan.
  • Solids separation – Automated solids separation helps maintain settling, clarification, and screening performance as flow and loading conditions change. Level sensors, torque monitors, sludge blanket sensors, and flow meters can be used to track equipment status and process conditions. The control system can adjust scraper operation, sludge pump cycles, screen cleaning sequences, and return activated sludge rates based on operating data. This keeps solids moving through the process and helps prevent buildup, carryover, and avoidable equipment strain.
  • Disinfection control – Automated disinfection control helps maintain treatment consistency before discharge or reuse. Flow meters, residual analyzers, turbidity instruments, and UV intensity sensors provide the data needed to adjust the process. In chemical disinfection systems, the control system can increase or decrease feed pump output based on flow and residual readings. In UV systems, it can adjust lamp banks or intensity based on flow, transmittance, and equipment status. These controls help maintain effective disinfection while reducing excess chemical use or unnecessary energy demand.
  • Sludge handling and dewatering – Automated sludge handling controls the movement, conditioning, and dewatering of solids after they are removed from the treatment process. Flow meters, solids concentration instruments, level sensors, and equipment feedback signals monitor sludge feed, polymer use, conveyor operation, and dewatering equipment status. The control system can adjust sludge pump output, polymer feed rates, mixer operation, belt press or centrifuge sequencing, and discharge equipment. This helps keep sludge processing consistent as solids concentration and flow change.
  • Remote monitoring, alarms, and reporting – Remote monitoring connects pump stations, treatment equipment, tanks, and control panels to a central operator interface. The system collects runtime, flow, level, alarm, chemical use, and equipment status data from PLCs and field devices. Operators can view conditions, acknowledge alarms, adjust setpoints, and review trends from a control room or approved remote access point. The same data can support operating records, maintenance planning, compliance documentation, and faster response when equipment or process conditions move outside expected limits.

How Kasa Controls Supports Wastewater Automation

Kasa Controls and Automation supports the application of automation and control for wastewater systems by designing and integrating the control systems that connect field devices, equipment, operators, and data. That work can include control system design, PLC programming, HMI and SCADA development, custom control panels, VFD and motor control integration, telemetry, commissioning, startup support, and long-term service. In wastewater systems, these controls help coordinate pumps, blowers, valves, chemical feed systems, remote sites, alarms, and operator interfaces, enabling the process to run with greater visibility, consistency, and control.

When you are ready to automate or update your wastewater system, contact Kasa.