Skip to main content


Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

These are the results of a study to understand the turbidities observed in the secondary effluent supplied by Hyperion Treatment Plant (HTP) of City of Los Angeles (CLA) for reclamation. These turbidities are higher than desired, and appear to be the main reason for the frequent occasions when the reclaimed water exceeds the 2 NTU limit specified by Title 22. Simultaneous data from a Laser Particle Counter (LPC) and the turbidity meter at the HTP pumping station have been tabulated from March 11 to March 23, 1999, and subjected to several forms of analysis that show clearly that the observed turbidities are caused by a particle population covering the size range from about 7 μm to more than 15 μm. Another population was also discovered to be present, in the size range from 2 μm to around 5 μm. This population was not detected by the turbidity meter, and its concentration is often, but not always, anticorrelated with the density of the larger particles or turbidities. This study is an example of the opportunities for using particle counters to gain detailed understanding of secondary clarifier and tertiary filter behavior that would be difficult to observe in any other way. Other applications of particle will also be presented, for example, water, air and hydraulic oil.
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: 2000-01-01

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 These proceedings are not peer reviewed.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