Skip to main content

Getting the Bugs Out of Digestion and Dewatering with Thermal Hydrolysis

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

Abstract:

This paper reviews some of the work done over the last twenty years on the thermal pretreatment of sludge and particularly activated sludge. It is demonstrated that the optimum time temperature for thermal pre-treatment is 170°C for half an hour. Pre-treatment at 70°C has little or no effect on digestibility and dewaterability. The practical application of this approach in the Cambi process is demonstrated in terms of digestibility and dewaterability for the HIAS project in Norway, which has been operating 5 years. Results from 2000 for the Naestved project in Denmark demonstrate a marked improvement in the digestion of WAS. The results of land application and crop trials for hydrolysed digested cake are shown. It is concluded that the thermal hydrolysis process gives a very stackable and stable product that is a safe fertiliser for the future. This has led to the rapid adoption of the technology in Europe in the last 3 years in projects from 5 to 100mgd.

Document Type: Research Article

DOI: https://doi.org/10.2175/193864701784992976

Publication date: 2001-01-01

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 These proceedings are not peer reviewed.

    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
  • 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