Solution required for the Reduction of HCL for PH Controlling in waste water treatment plant

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I am searching company or consultant for given us solution for waste water treatment plant. HCL using for PH Controlling. How we can reduce this HCL utilizing in Waste Water Treatment process. 

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14 Answers

  1. Since this is a wastewater application, carbon dioxide is the only option that makes sense. It is easy and safe to use and far less expensive overall. The bacteria will be happy with the change from HCl to CO2 as well. If you have any heavy metals, you are far more likely to decrease their concentration using CO2 than with HCl.  You will get added buffering with the CO2 something mineral acids will not do. You can augment your current aeration with CO2 if you have an aerobic system or just feed CO2 in an anaerobic one. 

  2. You can achieve this by multiple ways: 1)using alternate acid (e.g. sulphuric acid) 2) by installing high efficiency mixer device to mix acid 3) varying fluid temperature. 4) reducing the alkalinity of feed by segregating the inlet streams

    Please select the one which suits your budget.

  3. Dear Atiq Rehman,

    It seems that your alkaline wastewater requiring hydrochloric acid (HCl) to neutralize the pH originates from a food or beverage industry using sodium hydroxide (NaOH) for cleaning-in-place (CIP). For this kind of wastewater we apply biological acidification (without adding acid) successfully over the last 40+ years.
    In addition, we recommend food & beverage industries to recover and store the spent NaOH from CIP for downstream pH correction of the wastewater if/as needed.

    If interested I can advise in more detail via email.

    Kind regards,
    Bruno Peeters

  7. We have couple of methods to reduce the Acid Consumption in the Neutralization of Wastewater. We need Flow rate, Type of Wastewater, pH, Alkalinity, Total Hardness, Total Dissolved Solids, Total Suspended Solids, and Current HCl consumption. Share the details here and at servicesenvirochem@gmail.com

    2 Comments

  8. A description of your system will help us greatly to give you our best recommendation. Could you please provide us with such information?

    2 Comments

    1. At this moment i have some control perameters , 

       

      1.       Alkalinity :1400 mg/l as CaCO3

      2.       Acid Consumptions: 1.5 – 2 Tons/day

      3.       Strength of Acid: Hydrochloric Acid 30%

      4.       Capacity of plant : 6000 m3/day

      5.       pH of Effluent: 11-13

      6.       Desire pH of Effluent: 7– 8

      7.       Point of Application/Equalization Tank Dimensions: 18.5 m x 18.5 m x 6 m

      8.       Distance between Stack Emissions  to Application Point:1200-1300 ft

      9.       Flue Gasses mass flow rate:18,899 kg/hr x 2 Engines

      10.   Temperature of Flue Gases/Stack: 130 C -160 C

  9. My extensive water treatment experience always promoted the use of carbon dioxide for pH control!  MUCH safer and easy to control.  If HCl is the only option it can still be regulated, but the handling is more difficult and precise control is often harder as well.

    1 Comment

  10. Let's start with the basics.  What is the alkalinity of the water?  What are you trying to do with the acid addition besides lower the pH?  Why do you need to lower the pH?  What is your flow and how much acid are you using?  What is the strength of the acid?  Again, what is the goal of your treatment?

    If you have questions, drop me a line: DLR@mindspring.com

    2 Comments

  11. We are happy to consult on the project.  There may be some upstream synergies that will reduce the usage.  We will also look at the salinity impact on the microbiology.  If there is significant neutralization increasing the TDS substantially then there are some other challenges that present themselves.  Always the name of the game in wastewater is steady.  Please give me a call to discuss the situation more thoroughly.  It may be me, or it could be another consultant in the firm.  We always put the best team on the field.  seanlroop@iandec.com, (239) 989-3581 (mobile)  Thanks, Sean L Roop, Owner sand Senior Consultant, Industrial and Engineering Consultants, LLC.

    2 Comments

  12. Without at lot of information supplied and depending on the sophistication of the dosing control you should be able to reduce the use of HCl while maintaining optimum control. Using a 4-20mA proportional control signal directly from the pH controller. Set the zero output (4mA) to just below the upper range (if range is pH 6 to 8) set it say at pH7.5. Set the 20mA value to pH 9. The dosing pump will aim to maintain the pH at 7.5 using a variable speed dosing pump.

  13. Sulfuric acid might be cheaper per kilo of H+.  Also, Iron or alum coagulants are acidic. You would also get improved water quality if you coagulate. You might be able to get iron salts free from a steel mill or other metal industry. It is a byproduct that they dispose of---pickle liquor.

    1 Comment

  14. I assume you are trying to reduce the pH.   Using nanobubbles of CO2 might be one solution.

    2 Comments