pH Adjustment Systems

pH Neutralization / pH Adjustment Systems for industrial wastewatertreatment 

OMEGA Custom Waste Neutralization Packages

Wastech offers a complete family of Omega acid and caustic waste neutralization solutions. These include custom designed systems with fabricated tanks and standard designs with molded tanks. Standard single-stage OMEGA acid waste treatment systems may be ordered for 10 gpm, 15 gpm, 20 gpm, and 30 gpm. Standard control panels for relay control or PLC control are available as separate items for neutralization.

The Wastech Zeus™ software package for PLC control is available for single-stage or two-stage neutralization operations. Please see our OMEGA neutralization system features.

For custom applications, Wastech engineers will work with the customer to develop a specification, including mechanical, electrical and control designs. Wastech will select components, provide a layout for the space allowed, and address operational issues. Standard OMEGA specifications are available for consulting engineers. Wastech will fabricate special tank configurations up to 1000 gallons in PP or will work with FRP or HDPE fabricators for a custom size. Wastech designs can handle strong acids, concentrated acids, superacids such as Oleum or Chlorosulfonic Acid. Large OMEGA Systems for waste neutralization are available with capacities to 500 gpm.

As a waste treatment supplier, Wastech understands how to incorporate the neutralization or pH adjustment step into a complete waste treatment design for fluoride removal and heavy metal precipitation.

Accessories such as flow meter additions, heat exchangers, on-line analytical measurement, communication issues, data logging, redundant sensing, tank storage and level monitoring, wireless communication, actuated valves, Seismic Zone 4 designs, and pumping requirements are all routine changes.

Most customers want to build acid and caustic waste neutralization packages themselves on-site to save money; however, once they understand what Wastech offers, they realize that the Wastech package actually has a lower installed cost. Reasons are as follows:

  1. Lower labor costs by using Wastech's factory labor instead of "prevailing wage" trades on site. On-site work will typically require use of mechanical and electrical trades.
  2. Fewer parts delivered to the site that can be lost.
  3. Faster installation with one power connection and simple inlet and outlet piping hookups.
  4. Simple startup with a Wastech engineer on site.
  5. No submittal hassles – Wastech drawings accepted the first time, usually without comments.
  6. One phone call if something doesn't work.

Acid Neutralization Options

Options can make all the difference!  Wastech OMEGA neutralization packages are only limited by your imagination.
For more information, see

  1. Both active and passive systems are available:
    1. Active uses metering pumps with NaOH (caustic) or H2SO4 (sulfuric acid).
    2. Passive uses CaCO3 (calcium carbonate or limestone chips).
  2. The system can be a batch treatment system or a continuous treatment system.
  3. One, two or three-stage active systems are possible (each with a separate set of metering pumps).
  4. Surge tanks or equalization tanks can be included.
  5. CO2 gas neutralization for high pH applications instead of liquid acid (gas forms carbonic acid when combined with water).
  6. Strong acid (0-2 pH) neutralization for laboratories.
  7. Limestone systems for passive solutions.
  8. Custom tanks for combined sampling and reaction tanks in a small footprint.

Combination fabricated PP tank showing sample tank.

Relay panel with two Signet ProcessPro controllers and a Wastech Series 800 strip chart recorder. PLC panel with HMI black & white display screen and a Wastech Series 800 strip chart recorder.

Wastech OMEGA neutralization packages can be designed with relay controls or PLC software featuring the Zeus™ control package. See OMEGA Neutralization System Features.

Relay control uses a pH controller to accept the sensor input and turn on or off relay to the metering pump based upon setpoints. GF Signet or Rosemount are normal choices, but any controller specified by the customer can be used.

PLC control requires a display screen and PLC software. When the project involves temperature, flow rate, totalizer, multiple tanks, actuated valves and other inputs, a PLC is the perfect low-cost solution. Over the years, Wastech has developed a PLC control program that handles all neutralization designs. This program allows data logging, internet monitoring, and alarm communication to beepers or cell phones.

Packaged OMEGA Neutralization Packages

Flow Rate
Inlet Size (gravity) Outlet
OMEGA-10 10 7' 6" 4' 6" 5' 0" 1", FPT 2", FPT 800 lbs
OMEGA-15 15 8' 6" 4' 10" 5' 0" 1.5", FPT 2", FPT 950 lbs
OMEGA-20 20 8' 6" 4' 10" 7' 0" 1.5", FPT 2.5", FPT 1100 lbs
OMEGA-25 25 9' 0" 5' 7" 7' 0" 2", FPT 3", FPT 1350 lbs