From ceginfo@u.washington.edu Thu Apr 26 14:48:58 2001 Received: from jason01.u.washington.edu (root@jason01.u.washington.edu [140.142.8.10]) by lists.u.washington.edu (8.11.2+UW01.01/8.11.2+UW01.03) with ESMTP id f3QLmu926834 for ; Thu, 26 Apr 2001 14:48:56 -0700 Received: from homer38.u.washington.edu (ceginfo@homer38.u.washington.edu [140.142.16.4]) by jason01.u.washington.edu (8.11.2+UW01.01/8.11.2+UW01.03) with ESMTP id f3QLmtA09270; Thu, 26 Apr 2001 14:48:55 -0700 Received: from localhost (ceginfo@localhost) by homer38.u.washington.edu (8.11.2+UW01.01/8.11.2+UW01.03) with ESMTP id f3QLmsP91676; Thu, 26 Apr 2001 14:48:54 -0700 Date: Thu, 26 Apr 2001 14:48:54 -0700 (PDT) From: Civil and Environmental Engineering To: , Subject: MSCE Defense - Clair Yoder Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII The final examination for the MSCE degree for Clair Yoder will be held on Thursday, May 3, 2001 at 1:30 p.m. in Loew 217 (Room Confirmation #20900). Dewaterability of Anaerobically Digested Sludge Sludge processing is a necessary step after stabilization to reduce volume and improve handling characteristics. A large portion of sludge processing costs include those from polymer addition and hauling and disposal of dewatered cake. Due to the large costs associated with sludge processing, King County continues to evaluate methods to improve sludge dewaterability. This research project is segmented into several parts that investigate the important factors affecting the dewaterability of anaerobically digested sludge. The first part of this study consisted of an anaerobic digestion dewartering survey of over 50 wastewater treatment facilities in the United States. The objective of the survey was to determine if dewaterability is related to specific plant design and operating conditions, and to identify samples for further lab analysis. Fifteen samples having both good and bad dewaterability were chosen for bench scale testing and evaluation of sludge characteristics. These 15 samples were used to evaluate the applicability of bench-scale tests used to predict and compare a sludge's dewaterability. The samples were also evaluataed based on their physical, chemical, and soluble characteristics and then were related to the dewaterability. Lastly, several exploratory tests were conducted to investigate the effect of sludge and polymer mixing methods on the amount of polymer needed for sludge conditioning and the dewatered cake solids concentration. Marcia Buck Graduate Advising Office, More 201F Dept. of Civil & Environmental Engineering University of Washington Box 352700 Seattle, WA 98195-2700 (206) 543-2574 email: ceginfo@u.washington.edu .