Brown and Caldwell Home Page

Brown and Caldwell engineers and scientists are technical and thought leaders in the environmental sector. Meet the people who have been advancing innovation for more than 70 years.
Author      Title/Abstract      

Integrating Anaerobic Digester with Liquid Stream Treatment: Modeling Approach
Author: Derya Dursun, Jose Jimenez, John Bratby
Date: 6/311
Preprint, WEF/AWWA Joint Residuals and Biosolids Management Conference 2011 May 22-25, 2011, Sacramento, CA

Although, anaerobic digestion (AD) modeling can provide significant benefits in the design, operation and optimization of the digestion performance, AD model inputs are relatively complex and may require a wide array of components which are most of time not measured in wastewater treatment facilities. Therefore, the selection of an appropriate digestion model is crucial in integrating AD modeling in liquid stream simulations. A comparison between the structure and benefits of the Anaerobic Digester Model (ADM-1) and the General Activated Sludge - Digestion Model (ASDM) is assessed in the content of this study. The influent wastewater characteristics have shown to have a significant impact in AD modeling. Model calibration and validation studies have also shown that the hydrolysis rate has tremendous effect on the mode predictions and this may have to be modified to predict plant performance. The gas production and volatile solids reduction (VSR) proved to be highly affected by the quality of the input data while the alkalinity was less influenced. The effects of design and operational parameters on the performance of AD were also assessed by using a calibrated and a validated model. An integrated AD model can be utilized to simulate numerous different scenarios to design a new digestion system and/or upgrade an existing one.

This library contains published materials for which copyrights may be owned by entities other than Brown and Caldwell, but which are stored for limited uses by BC employees. Technical papers authored by BC employees generally may be printed and shared electronically with clients and prospective clients outside BC. Technical papers cannot be sold, and technical papers shared outside BC must have proper attribution of the original sponsoring organization or conference where the paper was presented. This attribution is embedded in each technical paper file when it is loaded into this library. Published articles from magazines or trade journals which are stored in this library are FOR INTERNAL USE ONLY and SHOULD NOT be distributed to clients or others outside BC, without express permission of the copyright owner. For questions regarding copyrights associated with any document in this library, or questions regarding copyrights in general, contact the Legal Department.