Skip to main content


Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

The main objective of this study was to investigate whether the disinfection efficiency of E. coli by peracetic acid and monochloramine was dependent on the initial microbial density. To track this hypothesis, complementary research works were carried out at Technical University of Bari, Italy (using peracetic acid to disinfect native E.COLI) and Drexel University, USA (using monochloroamine and E.COLI monoculture pure strains).

Peracetic acid disinfection experiments were performed on effluent of secondary treatment of municipal wastewater. Samples were drawn from secondary settling tanks of the City of Taranto municipal wastewater treatment plant. In this case, the initial microbial density of the native Escherichia coli was intrinsically variable due to the daily variability of wastewater. Monochloramine disinfection experiments were conducted on laboratory water spiked with E. coli to produce initial microbial densities of 103 CFU/mL, 104 CFU/mL and 105 CFU/mL. At least three experiments at each initial microbial density were conducted for each of approximately 0.75 mg/L, 1.0 mg/L and 1.5 mg/L of monochloramine exposure.

For both disinfectants and waters, results indicated a strong dependence of Escherichia coli disinfection efficiency on the Escherichia coli initial microbial density. These results indicate that future batch disinfection studies of Escherichia coli disinfection should include experiments performed with a wide range of initial microbial densities and that initial microbial density should be considered in determination of disinfectant dose at operational wastewater treatment plants.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Data/Media
No Metrics

Document Type: Research Article

Publication date: 2007-01-01

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 These proceedings are not peer reviewed.

    A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Learn about the many other WEF member benefits and join today
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed 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