Skip to main content

The Effect of Idle Time on Reduction of Viruses in an Intermittently Operated, Householdscale Slow Sand Filter

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

Abstract:

Virus challenge experiments were conducted at full-scale and bench-scale on an intermittently operated household scale slow sand filter popularly known as the biosand filter. Results reported here detail the effect of idle time on the concentration of coliphages PRD-1 and MS2. Benchscale experiments incorporated sampling within the sand bed during the idle time at two depths, 10- and 30-cm. Our results indicate that waterborne virus concentrations decrease during the idle time of intermittently operated slow sand filters and that silica sand undergoes an “aging” process over days-to-weeks of daily filtration. This aging process alters the sand in a way that it acquires the ability to reduce the concentration of viruses during the idle time. Rates of reduction in aged sands were comparable for PRD-1 and MS2 and varied between 0.030-log10 and 0.062-log10 per hour of idle time. Rates of reduction in survival controls averaged less than 0.003-log10 per hour of idle time.

Keywords: BSF; HWTS; POU; Slow sand filtration; biosand; household water; point of use

Document Type: Research Article

DOI: https://doi.org/10.2175/193864709793847762

Publication date: 2009-01-01

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 These proceedings are not peer reviewed.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