Skip to main content

UV DISINFECTION MODELING: IMPLICATIONS OF BACTERIAL COLONIZATION OF WASTEWATER SOLIDS

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

Abstract:

Fractions of fecal coliform based on the size of their associated particles were generated by sequential filtration of municipal wastewater. Size fractionation provided opportunities for modeling disinfection. The Scheible model for relating the non-inactivated bacterial density with total suspended solids (TSS) was modified. A weak correlation was found between the large fraction initial coliform concentration (operationally defined as organisms retained on a 20 μm filter) and TSS. The empirical WERF model appeared to describe the disinfection data well, with dose and initial fecal coliform concentration as the most significant factors. The disinfection curves could be reconstructed successfully by a weighted addition of the disinfection characteristics of the fractions. The reconstruction was successful even when the initial fecal coliform concentrations of the size fractions was estimated by TSS. Reconstruction of the tail, along with the disinfection curve for the large fraction, indicated that about 1% of the organisms retained on a 20 μm filter contributed to the tail. Two other observations (the dependence of the disinfection rate constant for a fraction on the initial fecal coliform concentration of the fraction and that the whole sample survivor density approaches the large fraction survivor density at large doses) were described by the rational model (where the rate of disinfection is proportional to the survivor concentration raised to a power).

Document Type: Research Article

DOI: https://doi.org/10.2175/193864704784148367

Publication date: 2004-01-01

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 These proceedings are not peer reviewed.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
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