Todd Williams

Todd Williams

Todd Williams

Speaker | Jacobs Engineering

South Lyon, MI | todd.williams3@jacobs.com

USCC Member

Mr. Williams has a 39-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 utilities, 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 Jacobs Engineering’s Residuals Resource Recovery Practice Leader.

Session Name: Biosolids Development Around the US and Guam

Session Time: Wednesday, January 29, 8:00 to 9:15 AM

Presentation Title: Development of Biosolids Composting in Guam

Presentation Summary: As a US territory in the Southwest Pacific Ocean, the Island of Guam is extremely remote located over 3500 miles from Hawaii and over 6000 miles from mainland US. As a result, supplies are costly to ship to the island and disposal of waste materials is even more challenging with only one permitted solid waste landfill that can accept biosolids on the island.  In 2018, the Guam EPA began an initiative to identify wastes that could be removed from landfilling as part of a sustainable materials management program.  One of the materials that has been landfilled is over 9,000 tons annually of dewatered wastewater biosolids which makes up nearly 10 percent of the landfill’s incoming waste stream.  In an effort to remove this valuable resource material from the landfill, the Guam EPA sponsored a biosolids composting demonstration study in 2019 to show the benefits of this management option since no biosolids composting is currently being performed on the island.  The composting demonstration study utilized the aerated static pile method of composting with odor control.  Testing of wastewater solids and compost produced was not only performed for US EPA 503 metals but also for Per- and Poly- Fluoroalkyl Substances  (PFAS) to demonstrate the high quality of the compost produced.  Growth trials using the compost are also being developed, the results of which will be available to present at the conference. The presentation will provide information on how the demonstration study was performed using an innovative layout with simple controls.  Planning level costing information on the development of full scale wastewater biosolids composting program for the island will also be presented.  This information will be useful for planners, administrators, engineers and operators who are considering the development of composting operations, especially in remote locations.

Co-Authors: Conchita Taitano, MSEM, Guam Environmental Protection Agency, conchita.taitano@epa.guam.gov
Laura Kanai, Guam Environmental Protection Agency, laura.kanai@epa.guam.gov