Brown and Caldwell Home Page
Technical Papers RECENT PAPERS    ALL PAPERS      LOG IN

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      


Mazimizing Energy Recovery Through Distester Gas Management System Enhancement.
Author: Adam Ross, James Bartlett, Tracy Stigers, Don Kiang (East Bay Municipal Utility District)
Date: 10/06
2006 WEFTEC

Advanced anaerobic digestion practices and maximum energy recovery call for a digester gas system that reliably allows for complete biogas collection and utilization. This paper will describe the planning, design, and construction of a new digester gas management system at the East Bay Municipal Utility Districtís (District) Main Wastewater Treatment Plant. The need for an upgraded system arose from the Districtís digester modification program Ėincluding conversion from floating to fixed covers, the addition of digester mixing, modifications to the feed cycle, and addition of thermophilic temperature capability. Upgrades accommodated the Districtís plan to be more energy self-sufficient and its Resource Recovery program, which dramatically increased the quantity and variability of digester gas production. The new system optimizes existing gas storage facilities and simplifies control. The design is complete, construction is underway, and operation will begin in fall 2006.