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Biosolids – What your community needs to know and will never want to forget


Oct 20, 2022




Teresa Shaak



The value of biosolids treatment, processing, and land application for all Pennsylvanians is something of a lesser known fact, yet one that becomes increasingly important when they are considering increases in water and sewer bills or considering higher prices for their local produce, or even more so for those more rural Pennsylvanian communities whose chief industries include agriculture and agriculture related industries.

This webinar will cover the history of biosolids in the United States and Pennsylvania, as well as the importance of biosolids to every Pennsylvanian.  Practitioners in biosolids will be identified and clearly defined, including public agencies who treat wastewater, the engineers and other organizations they work with to do so, and the farmers who use them on their land, as well as the state and federal regulators who oversee the process. In addition, the webinar will cover the latest technologies and trends for the future, including fertilizer pellets, compost, nutrient recovery and renewable energy options.

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William Toffey, Principal, Effluential Synergies, LLC

Bill has over 40 years’ experience in municipal wastewater, environmental and energy management.   He is the principal of Effluential Synergies LLC, a sustainable residuals consultancy, and until the beginning of 2022 served as the Executive Director of the Mid Atlantic Biosolids Association, a trade group that covers seven states and supports an industry with 800 biosolids generators and 1,800 biosolids practitioners. For 20 years prior to this position, he managed biosolids operations for the Philadelphia Water Department. During his career he has authored over 75 papers and presentations to a range of local, national, and international technical audiences, which includes operator training manuals and programs. Over the past seven years, he has authored 120 monthly biosolids reports to MABA members. Bill graduated from the College of Agriculture and Life Sciences at Cornell University and has a Masters of Regional Planning degree from the University of Pennsylvania. He is active in national and international professional organizations.

Nicholas Bonkoski, Domain Leader – Anaerobic Digestion Systems, Veolia Water Technologies & Solutions

Nick has spent 17 years in the water and wastewater industry.  He spent the first 4 years in the field commissioning membrane-based treatment systems before shifting focus to the biosolids and anaerobic digestion markets.  Nick is currently a Domain Leader with SUEZ Water Treatment System focusing on solution-based business development of anaerobic systems for biosolids, food waste and high strength waste streams.

Stefan Weaver, Senior Environmental Manager, Denali Water Solutions

Stefan Weaver is a certified professional soil scientist (CPSS) with 25 years of professional experience in residuals and biosolids consulting. His areas of expertise include regulatory permitting and program oversight of beneficial use of biosolids and residual wastes.  He serves as a Senior Environmental Manager at Denali, a leading specialty waste management company in North America.  Mr. Weaver has a B.S and M.S in Soil Science from Pennsylvania State University.  A lifelong resident of Pennsylvania and he resides in Elizabethtown, PA.

Christopher Harvey, Senior Technical Advisor, RETTEW

Mr. Harvey has over 20 years of experience in biological wastewater treatment; 15 years of that experience in municipal and industrial wastewater treatment in anaerobic treatment, activated sludge, MBR, SBR and oxidation ditch systems as well as biosolids processing. He has been a process leader in biological wastewater treatment, including design, start up and commissioning, troubleshooting biological processes. His biosolids experience includes sludge dewatering, aerobic sludge digestion, anaerobic sludge digestion (thermophilic and mesophilic), food waste and co-digestion, industrial waste digestion, biogas scrubbing and upgrading to RNG as well as digestate treatment and nutrient recovery.



October 20, 2022
12:00 pm - 1:00 pm
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