July 13, 2018
Topic: How Food Scraps & Other Organics Work in Municipal Digesters - An Update on Co-Digestion Research
FEATURING: Professor Matt Higgins, Ph.D., Bucknell University, Lewisburg, PA
Dr. Higgins has led critical and timely research for WERF (now WRF) and other organizations on understanding biosolids odors, reactivation & regrowth, anaerobic digestion, and co-digestion of various organic residuals (biographical details). For this webinar, he provided an update on recent research on co-digestion.
Webinar Slides - NEDR #10 - July 13, 2018
Recording of Q & A / Discussion - NEDR #10 - July 13, 2018 - Topics: impacts of high phosphate (e.g. on dewatering); relation to rapid rise factors are mixing, viscosity of solids, and gas production rate; why odor goes down when food waste is added; cost of element analyzers; has anyone had bad experience with any particular added feedstock?; blending protocol for food waste samples for testing for COD; why mixing food waste slurry releases heat (heats up).
PAST ROUNDTABLES & UPDATES:
April 6, 2018
TOPIC: Where the Feedstocks Go: Exeter Agri-Energy in Maine
Anaerobic Digestion (AD) at Exeter Agri-Energy (EAE) and Agri-Cycle's Role in Feedstock Sourcing. Sarah Wintle and Greg Williams provided an overview of this leading northern New England food scraps recycling and AD operation. A new, huge digester went online at EAE in 2017, and it's gobbling up an expanding portion of organic wastes from Maine and beyond.
January 5, 2018
NEDR #8 Sponsored by our website sponsors.
What have we learned about buying, operating, & maintaining biogas engines in New England?
—Why choose an engine for biogas utilization? (compared to micro-turbines, etc.) - pros & cons
—Greater Lawrence Sanitary District’s experience with recently purchasing, permitting, & installing 2 engines
—Essex Junction’s experience switching from micro-turbines to an engine, including start-up concerns & successes
—Operating & maintaining engines at Lewiston-Auburn WPCA
—Questions & Discussion
Slides presented at NEDR #8 - Engines! (PDF)
Audio recording of NEDR#8 webinar
PART 1 - GLSD (MP3)
PART 2 - Essex Junction (MP3)
PART 3 - Lewiston-Auburn (MP3)
October 6, 2017
TOPIC: ADvancements in Mass & Around the Region
Presenter: James Doucett, Clean Energy Results Program Director, Mass DEP
Followed by a Roundtable of updates: food waste processing facility in Charlestown, MA; the new digester complex at Johnston, RI; co-digestion & biogas management at Lewiston-Auburn, ME; and co-digestion ramping up at Greater Lawrence Sanitary District, No. Andover, MA.
NEDR #7 was sponsored by Wangen America.
July 7, 2017
TOPIC: Digester Operations: Optimizing & Tracking Key Parameters
Presenter: Chris Muller, Ph.D., P. E., Principal Engineer, Brown and Caldwell, Andover, MA. Chris is a wealth of technical knowledge on anaerobic digestion and is continually involved in research to optimize digester operations. He's excited about digestion and looks forward to addressing your questions & challenges!
Slides presented by Chris Muller
NEDR #6 was sponsored by Huber Technology.
Slides presented by Steve Macomber
April 7, 2017
TOPIC: Types of "Wastes," Types of Digesters, Types of End Uses
Farm digesters & diverting food & other organics in Vermont
Presenter: Alex DePillis, Senior Agricultural Development Coordinator; VT Agency of Agriculture, Food & Markets
Slides presented by Alex DePillis
Guidance: How to Send Food Processing Waste to On-Farm Anaerobic Digesters
VT Food Processing Waste Import Form for Farms
January 6, 2017
TOPIC: Digester cleaning & maintenance
- Richard Weare, Capital Projects Manager, Greater Lawrence Sanitary Treatment District (GLSD), No. Andover, MA
Richard has worked in operations at GLSD for many years, including during and since the commissioning of the District's three digesters in 2002. He is overseeing the current installation of a fourth digester and combined heat & power (CHP) systems.
- Paul Senesac III, President & CEO, P&H Senesac, Milton, VT
Paul established P&H Senesac Inc in 1985, getting into the septic tank business and ultimately in the municipal & industrial waste treatment and cleaning business. The company is now a nationwide service business providign solids dewatering, lagoon cleaning, and digester cleaning.
October 7, 2016
TOPIC: Co-Digestion Results in Net Energy Producer
Technical details of East Bay MUD's ground-breaking, net-zero digestion & energy systems.
SPECIAL GUEST PRESENTER:
John Hake, who grew up in the Springfield, VT area, is the Manager of the Resource Recovery Program at East Bay Municipal Utility District (EBMUD) in Oakland, CA. EBMUD was the first water resource recovery utility in the U. S. to reach net-zero energy production - and then net positive energy production. They’re a leader in digestion, co-digestion, and energy generation. http://www.ebmud.com/wastewater/recycling-water-and-energy/
July 1, 2016
TOPIC: Co-Digestion: Adding outside feedstocks
- Jim Jutras of Essex Junction, VT, which has processed in its digesters FOG, landfill leachate, food processing residuals, and more - for many years.
- Mac Richardson, Lewiston-Auburn, ME, where, over the past year, they have begun experimenting with taking in outside feedstocks.
Presentation Slides (PDF)
April 1, 2016
TOPIC: Introduction & Organization
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