Tuesday 10:00 AM
Treatment - Wastewater
Collaboration of Industry and Local Municipality to Achieve Industrial Expansion Through Wastewater Treatment Modifications
In 2008, Thorn Creek Basin Sanitary District's (TCBSD) largest industrial customer, the Rhodia Group, approached TCBSD with a request to modify the strength of its wastewater to facilitate an expansion at Rhodia's Chicago Heights Facility. Rhodia requested an increase of 40% in their discharge to TCBSD of sodium sulfate (Na2SO4), a by-product of manufacturing a new chemical additive to be used in more fuel efficient vehicular tires. TCBSD, Greeley and Hansen, and Rhodia investigated the impact that this increase in sulfate loading would have on TCBSD's wastewater treatment facility. The investigation analyzed TCBSD's 16 MGD capacity facility, of which 2 MGD is industrial discharge from Rhodia, and reviewed various options for upgrading the facility to meet the increased loadings while still meeting TCBSD's discharge permit. Analysis of the TCBSD process indicated that the proposed 40% increase in sodium sulfate loading could be tolerated by the facility. However two areas that were sensitive to additional sodium sulfate loading included the biogas handling systems and the activated sludge settling process. The design included a multi-point ferric chloride distribution system, delivering 38% ferric chloride solution at several locations throughout the treatment process. The system can operate at low ferric chloride dosage rates of 100-140 gallons per day delivered to the primary clarifiers for sulfide control, or at higher ferric chloride dosage rates to the tertiary clarifiers to enhance activated sludge settling.
Moderator: Mark Halm
John J. McDonnell - Thorn Creek Basin Sanitary District
Mr. McDonnell has over 34 years as practicing environmental engineer in wastewater and solid waste, including 6 years as District Engineer at the Thorn Creek Basin Sanitary District.
Mr. McDonnell holds a BS Civil Engineering from Colorado State University, a MS in Civil Engineering from Stanford University and is a Professional Engineer in Illinois.
James M. Kerrigan - Greeley and Hansen
Mr. Kerrigan has over 6 years of engineering experience in water and wastewater design and construction. He is currently a project manager at Greeley and Hansen, a leading environmental consulting engineering firm dedicated to the water and wastewater industry.
Mr. Kerrigan has served as project manager for a wide variety of storm water, water, and wastewater engineering planning and design projects for public and private utilities and agencies. In addition to these activities, he is also involved in design of odor control facilities at wastewater treatment plants, program management for large combined sewer systems, and engineering services during construction.
He has been a member the Water Environment Federation since 2006 and has been actively involved in numerous WEF and Young Professional activities. He has also presented several papers and has authored published articles at both regional and national levels.
Mr. Kerrigan received a bachelor’s degree in Civil Engineering from Napier University, Edinburgh, Scotland and is a registered professional engineer is the state of Michigan.
David V. Hobbs - Greeley and Hansen
Mr. Hobbs has over 38 years of engineering experience in water and wastewater design and construction. He is currently an Associate at Greeley and Hansen, a leading environmental consulting engineering firm dedicated to the water and wastewater industry.