Skip to main content


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


This paper evaluated the impact of 95% purified single-walled carbon nanotubes (SWCNTs) on the activated sludge wastewater treatment process through a batch-scale study. We found that the SWCNTs adsorbed 22% of the soluble COD (sCOD, chemical oxygen demand). One-way ANOVA analysis revealed that only four experimental parameters, i.e., surface charge, sCOD, mixed liquor suspended solids (MLSS) and sludge volume index (SVI) were significantly impacted by the addition of SWCNTs. Other parameters such as pH, dissolved oxygen (DO), specific resistance to filtration (SRF), and relative hydrophobicity were not significantly impacted. Further data analysis demonstrated that better sCOD removal was achieved in the SWCNTs-added reactors than that in the control reactors (80% vs. 62%). The addition of the SWCNTs also improved sludge settleability and made the surface of the activated sludge flocs less negatively charged. Overall the SWCNTs showed positive impacts on the reactor performance and sludge properties.

Document Type: Research Article


Publication date: January 1, 2007

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 These proceedings are not peer reviewed.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

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Partial Open Access Content
Partial Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
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