Precision pH Control for Industrial Wastewater
LibertyCES engineered a closed-loop industrial wastewater pH control system for a major U.S. cheese plant using electric chemical dosing pumps, inline pH sensors, PLC logic, and SCADA feedback.
The Challenge
- No reliable pH sensor feedback made corrections guesswork-based
- Overshooting driven by batch flow swings, lag time, delayed control response
- Fouled probes delayed dosing cycles
- Manual dosing adjustments caused 18–25% chemical overuse
- Permit compliance risk when pH swings moved outside required range
The Solution
- Closed-loop logic for real-time chemical feed correction via PLC
- Inline pH sensors for feedback before overcorrection
- Electric chemical dosing pumps for controlled low-flow precision
- SCADA integration for continuous data-driven visibility
- 24% chemical savings documented in sulfuric acid and KOH usage
"Since Liberty installed the system, our operators finally trust the numbers on screen — no more guessing, no more violations." — Plant Engineer
Stabilizing 125,000 GPD of industrial wastewater required more than a pump swap — inline sensors, PLC logic, and SCADA visibility turned manual correction into controlled chemical feed.
Graco QUANTM™ i30 Pump
Electric diaphragm dosing designed for precise chemical feed and continuous-duty control.
Griffco Pulsation Dampener
Smooths discharge flow and helps reduce pressure shock to downstream instrumentation.
Plast-O-Matic Gauge Guard
Provides chemical isolation between corrosive process fluid and pressure instrumentation.
Asahi Series 19 Valve
Automated thermoplastic valve selected for chemical service and control integration.
Asahi ChemProline™ Piping
Chemical-resistant process piping specified for acid feed routing and system reliability.
Poly Processing SAFE-Tank®
Double-wall containment design that may help simplify secondary containment planning.
"Centrifugal pumps were never going to survive in that slurry. We spec'd the QUANTM because it runs without a traditional mechanical seal, and we tied it into SCADA so the plant never flies blind again." — James Riggins
What is a closed-loop wastewater pH control system?
Uses real-time pH sensor feedback, automated dosing pumps, and control logic to adjust chemical feed automatically. Instead of relying on manual corrections, the system responds to changing wastewater conditions as they happen.
Why do industrial wastewater systems overshoot pH?
Overshooting often happens when chemical dosing is delayed, manually adjusted, or based on poor sensor feedback. Batch flows, lag time, fouled probes, and aggressive chemical feed can push wastewater beyond the target pH range.
How did LibertyCES reduce chemical waste?
Used inline pH sensors, electric chemical dosing pumps, PLC logic, and SCADA feedback to make dosing more precise, reducing overcorrection and lowering sulfuric acid and KOH usage.
What industries need automated pH control?
Food and beverage plants, dairies, cheese plants, industrial manufacturing, municipal wastewater pretreatment, chemical processing, and facilities with regulated wastewater discharge limits.