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!
  • Students Click Here

*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

Related Articles


EPDM Membrane Diffuser Life?

EPDM Membrane Diffuser Life?

EPDM Membrane Diffuser Life?

What sort of life span is typical for EPDM tube type membrane diffusers in municipal wastewater treatment plant applications?



RE: EPDM Membrane Diffuser Life?

I have had experience with a couple of different types. There are lots of variables. One of the things that has a big bearing i believe is the number of cycles the diffusers do where they go from no air flow to full airflow such as what they might in an SBR.

I have seen lots of failures sometimes in only a few months. I would think anything over two years between change outs would be pretty lucky in an SBR type application. Where there was always a fairly constant airflow such as in a conventional aeration tank with modest airflow per diffuser flow rates you would probably do a bit better.

"Any water can be made potable if you filter it through enough money"

RE: EPDM Membrane Diffuser Life?

This is a conventional plug flow aeration basin, so aside from rare anomalies they're on 24-7. They're getting something of a calcium-iron scale and we're starting to see some failures. They were installed in 2010, so wondering if these are premature and any related to the buildup or if we've already got our money's worth out of them and need to replace with like kind?

RE: EPDM Membrane Diffuser Life?

Typical lifetime is 7-9 years.

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!


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