Skip to main content

LAMELLAS TO INCREASE THE MIXED LIQUER SUSPENDED SOLID (MLSS) FOR BIOLOGICAL WASTEWATER PURIFICATION

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

Abstract:

The European water protection legislation requires the advanced nutrient removal down to 13 mg/l Ninorg. As a result, many sewage treatment plants have to upgrade their biological treatment step. There are two main possibilities to increase the capacity. One is to increase the treatment tankage, the other one is to increase the MLSS in the existing treatment tankage. The problem with increasing the biomass in the existing treatment tankage is the limitation of conventional final clarifiers' separation capacity. The installation of Lamella plate packets in the discharge of the biological reactor provides a pre-sedimentation, recirculates a certain amount of sludge directly back to the reactor, and limits the sludge feed to the final clarifiers.

The German Federal Foundation for the Environment supported the investigation to achieve layout criteria and to find out the limits of the lamella assemblies in a rectangular basin. The results show that with this technology, a pre-sedimentation of 1 – 1.5 g/l can be achieved. This means an ss removal efficiency with respect to the biomass concentration in the aeration basin of 25 – 30%.

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864705783865488

Publication date: January 1, 2005

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 These proceedings are not peer reviewed.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
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