Next Year's Conference:
October 21-23, 2013 • Columbus, Ohio

BioCycle Renewable Energy from Organics Recycling Conference

Presentation Descriptions
Monday, October 29, 2012 — Track 3

Updated 10.12

Presentation previews:   Monday: Plenary | Track 1 | Track 2 | Track 3   Tuesday: Track 1 | Track 2 | Track 3

Monday, October 29, 2012 | | TRACK 3 || 11:00 AM — 12:15 PM

Biorefineries, Sustainable Energy Crops

Integrated Biorefineries For Western U.S.: Tapping Under Utilized Biomass
William J. Orts, USDA ARS-WRRC
The Agricultural Research Service is developing biorefinery strategies that are applicable in the Western U.S. by converting agriculturally-derived biomass feedstocks and/or municipal solid wastes into value-added products including biofuels, bioenergy and biopolymers. Recent economic models are used to question the value of converting cellulosic feedstocks into sugars for further fermentation or to produce biogas. Many different factors are involved in such process decisions. In virtually all situations, though, data supports the production of biogas for, at minimum, the 40% to 60% of biomass that remains after most pretreatment protocols. Presentation also explores production of other potentially viable outputs including ethanol via fermentable sugars; methane from anaerobic digestion; biopolymers, including poly(hydroxy alkanoates), PHA, from biogas; and other chemical intermediates derived via AD, including commercially-viable fatty acids. Feedstocks include crop residues (eg. rice and wheat straw), energy crops, algae-derived biomass and MSW.

Integrated Farm-Based Biorefining Converts Agricultural Wastes Into Value-Added Products

Wei Liao, Michigan State University
Major barriers to commercial cellulosic biorefineries are conversion technology, and feedstock collection and transportation logistics. Addressing these barriers creates a good opportunity for the scientific community to make significant technological contributions to biobased fuels/chemicals production. Anaerobic digestion (AD) and algal cultivation have been proven effective at converting organic residues into various energy/chemical products including methane biogas, cellulose, starch and proteins. Considering both the improvement of biorefinery efficiency and the environmental benefits realized from the treatment of agricultural residues, this study developed a novel integrated farm-based biorefinery with three major components using a combined feedstock of animal manure and other crop residues to produce ethanol, methane and other value-added products. AD pretreats the fiber in agricultural residues for bioethanol feedstock preparation. Algal cultivation on AD effluent further reduces environmental impacts of odor and excess nutrients associated with AD, and generates a starch and protein rich biomass. The bioethanol process utilizes the carbohydrates in AD-treated fiber and algal biomass to produce ethanol. Results have demonstrated the increase of cellulose content during the AD process, significant enhancement of the subsequent conversion of the cellulose in this AD pretreated fiber to sugars, and improved algal growth on liquid AD effluent.

Flood Mitigation Via Growth Of Perennial Energy Crops
Nathan Young, University of Iowa/Iowa Flood Center
The University of Iowa's Flood Center has been investigating use of dedicated energy crops on chronically flooded land. The university foresees the possibility that traditional row cropping in flood-prone areas will be harder and harder to insure, therefore planting perennial energy crops such as poplars might provide an income alternative to those producers and help mitigate the impacts of flooding and help improve water quality.

Monday, October 29, 2012 | | TRACK 3 || 1:45 PM — 3:30 PM

Cogeneration System Heat Exchange

Fundamentals Of Heat Exchange With IC Engine
David McCallum, GE Energy

External Heat Exchangers In AD Systems
Susan Hammock, Alfa-Laval
Presentation will discuss digester applications for external heat exchangers, heat exchanger technology and design guidelines for heat exchangers.

Internal Heat Exchangers In AD Systems
Meik Schubert, BRUGG Rohrsysteme GmbH
Topics to be addressed in this presentation include the types of internal and external digester heat exchange systems (HES); considerations for selection of internal (pipe) HES; and sizing, installation and maintenance of HES.

Heat Exchange Systems — Case History
Kevin Jankowski, Applied Technologies, Inc.
This presentation provides an evaluation of a facility's thermal energy sources and sinks; a review of fluid transfer methods, materials and related considerations; and a compilation of lessons learned from various installations.

Monday, October 29, 2012 | | TRACK 3 || 4:15 PM — 6:00 PM

Codigestion At Wastewater Treatment Plants

Lessons Learned: Suitable Substrates In WWTP Digester
David Henderson, West Lafayette (IN) WWTU
Luke Werner, Kennedy/Jenks Consultants

Presentation gives update on the waste-to-energy project at West Lafayette, Indiana Wastewater Treatment Utility and includes a discussion on what "exotic" feedstocks work for codigestion, and which ones can be problematic.

Compatibility of Organic Waste Streams With Digester Operations
David Parry, CDM Smith
Presentation on codigestion at wastewater treatment plants (WWTPs) covers assessing organic waste management options, economics of codigestion and organic loading rates for digestion and stability. Information is culled from multiphase research project for the Water Environment Research Foundation, Food to Fuel research at the US Air Force Academy and full-scale implementation of codigestion at Des Moines (Iowa) WWTP.

Biosolids Management Evolution — Composting to Green Energy
Annette Berger, KB Compost Services
Presentation discusses the lessons learned — both challenges and successes — from operating a 5,000 dry tons/year biosolids facility that will be carried over to a 15,000 dry tons/year facility. Included will be managing the digested solids through a dryer as a result of the composting operations being shut down, and the metrics used to quantify whether the shift in disposal methods was a success.

Operational Challenges and Solutions to Managing Digesters Receiving Substrates

Timothy Shea and Todd Williams, CH2M Hill
Characterization of the organic wastes to be digested is an essential first step in managing digesters receiving substrates. Careful attention must be paid to the start-up procedure used. Inattention can result in digester overflows due to foaming, and digester overflows can result in significant damage to equipment. Steps to putting a contingency plan in place to avoid lengthy periods when wastes cannot be accepted will be reviewed.