×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Jobs

Inlet arrangement- Rapid Sand Gravity filters

Inlet arrangement- Rapid Sand Gravity filters

Inlet arrangement- Rapid Sand Gravity filters

(OP)
In a rapid sand filtration system what is the best influent distribution arrangment to split influent to each individual filter unit?

(a) Combination of Butterfly valves and inlet pipes.

(b) Channels and sluice/weir gates.

Even if the latter is the preferrred method, can method (a) be still used? If so how do we make sure that the alum flocs do not rupture as they enter the filters? Can this be achieved by maintaining the Reynolds number within the laminar region.
 
Thanks in advance.


 

RE: Inlet arrangement- Rapid Sand Gravity filters

Method (a) is more common with pressure filters. Method (b) is more common with gravity filters, especially after clarification with multiple filters.

Either method will work. You do not have to worry about the Reynolds number.

As a practical matter, the effects of pressure surges, flow rate changes, etc. have a greater effect on the effluent quality.

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!


Resources