Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Ammonia Stripping

Ammonia Stripping

Ammonia Stripping

I work in a NH3 and urea producing plant.
We a a very important quantity of effluent water that is normally contaminated with ammonia and carbamate that exceeds the ammonia regulations for the effluent of the plant.

We do not have any effluent treatment plant. We only have several ponds to receive de water and then, after controlling the ammonia content we dilute with raw water to meet the limit value.

We are thinking to make a stripping of that water either with steam or air.

1) Any other ideas ?
2) I will appreciate comments (pros and cons) on both stripping methods.
3) How to calculate the required installations and make a budget.
4) Technologies or recommended vendors
5) Any other helpful information to start the evaluation will be very much appreciated.

Best regards to you all.

RE: Ammonia Stripping

The better solutions are stripping with air or stripping with steam. The best of them depends of the ammonia conc. in water, among other variables, such as:
In case of air stripping, the installation could be made in plastics, but the gaseous effluent must be postreated,with an adsober bed or sending to flare,
In case of steam stripping, the ammonia could be recovery as ammonia solution.

See my paper "Air Stripping or Steam Stripping?" in the web page www.sitingenieria.com.

For more, just ask.

Regards, Spekuljak.

RE: Ammonia Stripping

Thank you very much Spekuljak I will read your paper.
Any other source for designing the facilities or Engineering Vendors ?

RE: Ammonia Stripping

I does not know your geographical place.

RE: Ammonia Stripping

Is a biological wastewater treatment option feasible in your area?  If your lagoons were upgraded to handle the ammonia you may not have to go through the stripping.  

There are biological/ecological systems available as retrofits to lagoons for nitrification and denitrification.


RE: Ammonia Stripping

Have you considered treatment with bleach (NaOCl)?  In the "Handbook of Chlorination", by GC White, the author talks about very similar processes used in the utility plants to remove organic / inorganic nitrogen from public water supplies - "breakpoint" chlorination.  Simple ammonia is converted to molecular nitrogen, other organics will form chloroform - so depending on the organic content this may not be an option.  One other downside, to this method is that there will be chloramine residuals - depending on chlorine dosages being applied.  Depending on where your discharge goes, these downsides may out weigh the benefits.

RE: Ammonia Stripping

Steam stripping is the normal norm in urea plants. You can recover the contaminants with a bit of steam. The stripper is normally called Hydrolyser stripper. Any of the Urea technology suppliers / enviro suppliers in your area should be in position to advice on technology/equipments/ cost etc.

RE: Ammonia Stripping

In case you have not yet found a suitable outfit to design your stripper, the following should be able to help.

Stamicarbon BV (Geleen, Netherlands) - leading urea process (including condensate treatment) licensor
Uhde GmbH (Dortmund, Germany) - Stamicarbon-licensed contractor with extensive experience
Urea Casale SA (Lugano, Switzerland) - specialist in urea plant retrofits and "revamps"
Siirtec-Nigi SpA (Milan, Italy) - ditto
Monsanto Envirochem (St Louis, USA) - current proprietor of the UTI urea technology portfolio, including a hydrolyser-stripper design.
KBR [Kellogg Brown & Root] (Houston, Texas) - leading ammonia plant contractor with condensate treatment technology.

Let me know if you would like communication details for any of these.


Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close