Skip to main content

BALLASTED FLOCCULATION – SURFACTANTS AND EFFLUENT FOAMING POTENTIAL

The full text article is not available for purchase.

The publisher only permits individual articles to be downloaded by subscribers.

or click here to sign up for a free trial

Abstract:

Some wastewater utilities in the United States have implemented or are evaluating ballasted flocculation treatment as part of their solution to prevent combined sewer overflow (CSO) or sanitary sewer overflow (SSO) from wet weather events. Unfortunately, some such installations, both pilot-scale and full-scale, have experienced effluent foaming that appears to be caused by pass-through of surfactants.

This paper presents the findings from a study conducted to assess the potential for effluent foaming from ballasted flocculation systems installed to control CSO/SSO. The study involved the following steps:

Sampling of wastewater treatment plant (WWTP) influent during wet weather conditions at seven publicly owned treatment works (POTWs) across the United States from spring 2004 through spring 2005.


Analyzing each influent sample for total, anionic and nonionic surfactants.


Subjecting each sample to bench-scale, ballasted flocculation treatment.


Agitating the treated effluent and observing its foaming characteristics.


Results of the study indicate that the effluent from most ballasted flocculation facilities installed for CSO/SSO control should be expected to have a significant potential to foam. The extent and magnitude of the foaming will be site specific, but the potential for foaming appears to be closely related to the influent total surfactant concentration.

Although not specifically addressed in this study, such effluent foaming may be expected from other physicochemical wastewater treatment technologies besides ballasted flocculation. Furthermore, it is anticipated that such foaming may be readily mitigated either through the addition of defoaming chemicals or through submerged outfall configurations.

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864705783867747

Publication date: January 1, 2005

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Ingenta Connect is not responsible for the content or availability of external websites
wef/wefproc/2005/00002005/00000016/art00027
dcterms_title,dcterms_description,pub_keyword
6
5
20
40
5

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more