×
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

Grease removal at septage receiving station

Grease removal at septage receiving station

Grease removal at septage receiving station

(OP)
I am designing a septage recieving station at a WWTP.  It is a small .5mgd wwtp.  How much septage should be added to the secondary treatment (A-O)?  And how should grease, grit and trash be removed from septage economically.  The price of the smallest Lakeside Total Plant with grease removal is $210,000.

RE: Grease removal at septage receiving station

What is the treatment method?  Returning sludge to the aeration or contact tank depends on the treatment process.  For small treatment plants, I'm guessing an extended aeration process or contact stabilization.  The character of the waste will have an effect as well.  If it is all domestic, then you have fewer problems to deal with.

Usually grease and oil are allowed to precipitate in a "grease trap"....just a tank where the wastewater is drawn from some point below the surface, as grease floats.

RE: Grease removal at septage receiving station

Septage is delivered to a wastewater treatment facility that has been designed to accept and treat this waste along with its normal sewage flow.  The septage is usually delivered to a septage receiving station where it is sampled before it is mixed with the sewage flow.  The septage sometimes undergoes separate pretreatment before it is mixed with the sewage flow.  This varies with the facility design.

Since septage is normally much stronger waste strength than normal domestic wastewater, you must sample prior to adding sample into the wastewater influent.

The septage receiving station is probably going to cost as much as your treatment plant. Here are some design guidelines:

http://www.awwoa.ab.ca/pdfs/Operating%20Experience%20Survey%20of%20Septage%20Receiving%20Facilities.pdf

www.michigan.gov/documents/deq/wb-fos-part41-ten-states-appendix_188980_7.doc

http://artikel-software.com/file/design_construction_and_operation_small_water_systems.pdf

www.afcesa.af.mil/shared/media/document/AFD-070613-076.pdf
 

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