Agenda: Download program (PDF, 2.1 MB) | Welcome remarks | Keynote speakers | Sessions: Monday, Oct. 31 Tuesday, Nov. 1 | Site tours: Wednesday, Nov. 2
All-day Site Tours, Wednesday, November 2
Two options are available: Tour 1 and Tour 2
Each option is all-day: 7:45 AM — 4:00 PM
Boxed lunch included. Preregistration required.
| Tour option 1: Dane County/Madison Region | ||||
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| Community Dairy Digester, Dane County, Wisconsin: The Waunakee Community Digester in Vienna receives about 7 million gallons/year of manure from 2,500 cows on three Dane County dairy farms. Manure is pumped from the farms to the plant in underground pipes. The facility includes three 1-million gallon digester tanks and a phosphorus removal system. After digestion, liquid manure is piped back to the farms for field application. Solids are used for bedding or composted for sale as soil amendment. The Waunakee digester system was built and is owned and operated by Clear Horizons LLC. Electricity is sold to Alliant Energy. | Biogas Upgrade and Fueling System: The BioCNG system installed at the Dane County Rodefeld Landfill utilizes approximately 25 standard cubic feet per minute (scfm) of landfill gas and produces approximately 100 gasoline gallon equivalents (GGE) per day. The BioCNG gas conditioning system is skid mounted and removes hydrogen sulfide, VOCs, siloxanes, carbon dioxide, and moisture from raw landfill gas. After treatment, the gas is sent to a fueling station — a small, trailer mounted-unit that contains approximately 60 GGE of storage. Dane County has been using the fuel in a county-owned CNG powered pickup truck since March 2011. Technologies represented include Unison Solutions and Cornerstone Environmental Group gas conditioning and fueling station. | Renewable Energy Production At Wastewater Treatment Plant: The City of Janesville, Wisconsin installed a biogas treatment skid for moisture, particulates and siloxane removal and 4, 65 kW mictroturbines with integral heat recovery. Electricity generated is sold directly to Alliant Energy. Heat recovered from the microturbines is used to heat the anaerobic digesters and offset some of the building heating load in the winter. Treated biogas can also be used to fire boilers that provide supplemental heat to the process and buildings. Janesville is evaluating the addition of CO2 removal equipment and a CNG fueling station for City vehicles. Tour includes digester facilities, microturbines, heat recovery systems and if installed by November, the bioCNG fueling station. | ||
| Tour option 2: Oshkosh and Beaver Dam, Wisconsin | ||
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| Dry Fermentation Digester, University of Wisconsin, Oshkosh: Operation of 8,000 tons/year dry fermentation anaerobic digestion system processing source separated food waste and yard trimmings on university campus. The UW Oshkosh project represents the first facility of its type operating in the U.S. Tour includes laboratory testing, material preprocessing, digester monitoring and controls, digestate/compost and 370 kW combined heat and power system. Technologies include BIOFerm Energy Systems and 2G Cenergy. The university owns the facility, which is projected to provide the campus with 8 percent of its electricity needs; the 7,900 MMbtu of thermal energy will be used to heat adjacent buildings. | Anaerobic Pretreatment At City Wastewater Plant: Kraft Foods and the City of Beaver Dam collaborated on an anaerobic treatment system to pretreat high-strength process wastewater and whey permeate from the cheese plant. A high-rate anaerobic biological treatment facility receives wastewater from the Kraft plant, with effluent discharged to the WWTP. This system enabled the city to reduce the size of facilities needed for its treatment plant upgrade. Biogas from the anaerobic reactor generates "Cheese Power" — about 800 kW of electricity, with captured engine heat used to heat the pretreatment anaerobic process and the anaerobic sludge digesters at the WWTP. | |
