The usability of mechanical disintegration techniques for the reduction of excess sludge production in the activated sludge process was investigated. Using three different disintegration devices (ultrasonic homogeniser, stirred media mill, high pressure homogeniser) and different operational parameters of the disintegration, the effect of mechanical disintegration on the excess sludge production and on the effluent quality was studied within a continuously operated, laboratory scale wastewater treatment system with pre-denitrification. Depending on the operational conditions and the disintegration device used, a reduction of excess sludge production of up to 70% was achieved. A combination of mechanical disintegration with a membrane bioreactor process with high sludge age is more energy effective concerning reduction of sludge production than with a conventional activated sludge process at lower sludge ages. Depending on the disintegration parameters, the disintegration has no, or only minor, negative effect on the soluble effluent COD and on the COD-removal capacity of the activated sludge process. Nitrogen-removal was slightly deteriorated by the disintegration, whereas the system used was not optimised for nitrogen removal before disintegration was implemented.

Particle & Particle Systems CharacterizationVolume 21, Issue 4 p. 253-253 EditorialFree Access Special Issue on Conveying and Handling of Particulate Solids Stefaan J. R. Simons, Stefaan J. R. Simons stefaan.simons@ucl.ac.uk Ben-Gurion University of the Negev, Beer-Sheva,, IsraelSearch for more papers by this authorHaim Kalman, Haim Kalman Ben-Gurion University of the Negev, Beer-Sheva,, IsraelSearch for more papers by this author Stefaan J. R. Simons, Stefaan J. R. Simons stefaan.simons@ucl.ac.uk Ben-Gurion University of the Negev, Beer-Sheva,, IsraelSearch for more papers by this authorHaim Kalman, Haim Kalman Ben-Gurion University of the Negev, Beer-Sheva,, IsraelSearch for more papers by this author First published: 10 November 2004 https://doi.org/10.1002/ppsc.200490005AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume21, Issue4November 2004Pages 253-253 RelatedInformation

Chemie Ingenieur TechnikVolume 73, Issue 6 p. 699-699 Article Consolidation and Flow of Bulk Solids Jörg Schwedes, Jörg Schwedes Institute of Mechanical Process Engineering, Technical University Braunschweig, GermanySearch for more papers by this author Jörg Schwedes, Jörg Schwedes Institute of Mechanical Process Engineering, Technical University Braunschweig, GermanySearch for more papers by this author First published: 12 July 2001 https://doi.org/10.1002/1522-2640(200106)73:6<699::AID-CITE6992222>3.0.CO;2-HAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume73, Issue6Juni 2001Pages 699-699 RelatedInformation