Water Intelligence Online © IWA Publishing 2008

Biosolids Processing Modifications for Cake Odor Reduction (Phase 3 of Identifying and Controlling the Municipal Wastewater Environment)

Gregory M. Adams¹, Jay Witherspoon², Zeynep Erdal³, Bob Forbes³, David McEwen³, Ron Hargreaves⁴, Matthew Higgins⁵, John Novak⁶

¹LACSD 1955 Workman Mill Road Whittier, CA 90601, Phone: (562) 699-7411, ext. 2113 - Office, Fax: (562) 692-9690
Email: gadams@lacsd.org
²CH2M HILL, 777 108th Avenue, NE, Suite 800, Bellevue, WA 98004, Phone: (425) 453-5005, ext. 5126 - Office
Cell: (425) 985-5636, Fax: (425) 468-3100, Email: jwithers@ch2m.com
³CH2M HILL
⁴LACSD
⁵Bucknell University
⁶Virginia Tech

Phase 3 of the overall WERF project was developed to study eight Phase 2 hypotheses in more depth, beginning in the laboratory (bench-scale) studies and continuing on to targeted investigations where the WERF team manipulated plant parameters at full scale to identify the best means of reducing biosolids cake odors. The Phase 3 research specifically sought ways to enhance anaerobicly digested and dewatered biosolids to reduce the odor levels in the biosolids end product, thereby reducing negatively perceived impacts on the environment or to the public when beneficially used on land.

The goal of the Phase 3 study was to provide a general application of findings to WERF subscribers who are seeking ways to reduce odors produced by anaerobicly-digested biosolids. The Phase 3 options summary present a general roadmap for wastewater treatment plant operators seeking to optimize biosolids processing and reduce biosolids cake odors.

Biosolids cakes with minimal odors lead to better public acceptance near biosolids management sites and in neighborhoods adjacent to WWTPs. Reduced odors also could open the WWTP dewatered biosolids cake to other recycling or disposal opportunities that are currently not used due to odor and other concerns (including on-plant site composting or storage). Additionally, significant cost savings could be realized by not requiring extensive odor control or other expensive options for containment and management of biosolids.

Keywords: Biosolids; odor

Full article (PDF Format)

UNIQUE ID:200810WF03CTS9T