Todd O. Williams

Todd O. Williams

Todd O. Williams

Speaker | Jacobs Engineering

South Lyon, MI | 804-833-9122 | todd.williams3@jacobs.com

USCC Member

Mr. Williams has a 38-year career in environmental engineering with operating and design experience and specific emphasis in biosolids management planning, and product utilization. Todd has assisted many wastewater cities, agencies and communities throughout North America in developing sustainable biosolids management programs. He has direct experience with new and emerging biosolids treatment technologies such as digestion, drying, pyrolysis, gasification and composting. Todd is the past Chair of the Water Environment Federation’s Residuals and Biosolids Committee and currently serves as the Jacobs Residuals Resource Recovery Global Technology Leader.

Presentation Title: Odor Control Performance Comparison Between Composting Technologies

Session: New Learnings on Composting Technological Deployment

Time: Wednesday, January 30, 11:00 AM – 12:30 PM

Presentation Summary: Historically, one of the major impediments to successful biosolids composting facilities has been the lack of understanding and properly designing and operating facilities to prevent offsite odor problems. This one issue has resulted in the closure of dozens of composting facilities that were otherwise successful. In the past decade, great strides have been made in the design of compost systems that can successfully contain and treat composting odors such that offsite odor problems are eliminated and facilities can be good neighbors.

Two popular composting technologies, the membrane covered aerated static pile process and the conventional aerated static pile process with biofiltration continue to be developed, each with a good measure of odor control. Both technologies provide superior odor control when compared to conventional windrow operations. These two technologies were evaluated in a composting facility study to determine how the odor control performance compared for a 42,000 ton per year capacity composting operation. Compost process emissions concentrations and flows from the proposed facilities were used to determine overall emissions estimates and to perform odor dispersion models. Graphic representation of the odor control performance of these operations could then be compared.

This presentation will summarize the comparison of the two technical approaches in terms of overall process flow,emissions assumptions and resultant odor emissions produced. Emissions information for windrow processing will also be presented as a comparison.This information will be useful for planners, administrators, engineers and operators who are considering the development of composting operations.