effluent iconpH neutralization is an important part of the wastewater treatment process. Government regulations at national and local levels set standards for wastewater discharge into sewers, streams, and lakes, groundwater, and more. Proper pH balance of discharge is required not only for compliance and the avoidance of fines, but also in order to preserve plants, animals, and local ecosystems.

If you’re in charge of creating or maintaining a large-scale pH neutralization system for use in wastewater treatment, then you know how important fluid controls are to the process. When it comes time for new or replacement sensors, the team at SMD Fluid Controls can provide you with the best sensors on the market. Keep reading to learn more.

ph Neutralization Process: The Basics

  1. First, wastewater flows from an inlet into a large holding tank, where an electric pH sensor determines the pH balance of the tank’s contents.
  2. The sensor then communicates with a central controller, which automatically operates a pump connected to a reagent tank. The pump’s behavior is controlled according to the pH reading of the sensor, and whether the wastewater needs to be acidified or alkalinized to reach pH neutrality.
  3. When the pH sensor indicates that neutrality has been reached, the treated water is discharged from the main holding tank. At this stage, a second pH sensor may record the treated water’s pH for confirmation or recordkeeping.

Applications for Level Sensors in pH Neutralization for Wastewater Treatment

  • Tank level controls: High level and low-level sensors are crucial for effectively managing holding tank levels and the prevention of overflow, among other tasks.
  • Leak detection: Low-level alarms can be effective ways to detect leaks in wastewater holding tanks.
  • Monitoring of storage inventory
  • Automation of chemical mixing and batching: Continuous level measurement can be used to portion out reagent used in the neutralization process.
  • And more

Level Sensors from SMD Fluid Controls

Below are some of the standard liquid level sensors carried by SMD Fluid Controls which may be useful in such applications, but note that custom designs and OEM service are always available!

FH09 Side Mount Liquid Level Switch UKFL-LL Steel Ultrasonic Level Sensor – This sensor uses ultrasonic waves for point-level or continuous measurement without the need for liquid media contact. Ideal for wastewater applications.

FT-60 Downhole Submersible Sensor – This sensor is submerged in the liquid media to be measured, where it calculates fluid levels based on hydrostatic pressure. Ideal for deep or narrow vessels.

FH09 Side Mounted Vertical Float Switch – This stainless steel vertical float switch features a 90-degree side mount, making it a good choice for high-level alarms in holding tanks or vessels. The steel casing is corrosion resistant.


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