Anaerobic Digest
Glenfiddich Distillery in Dufftown

BioCycle March/April 2014, Vol. 55, No. 3, p. 27

Feedstock Seasonality Impact On Biogas Production
May food waste (top, left) May yard trimmings (top, right) October yard trimmings (bottom, left) November food waste (bottom, right)

First graduate student to work on-site at University of Wisconsin-Oshkosh dry fermentation digester describes feedstock variations and biogas production trends.
Brooke Koenig
BioCycle February 2014, Vol. 55, No. 2, p. 43

Biodigesters And Dehydrators — Operational Experiences
One dehydrator is being filled (on left), while the second has finished the drying cycle and is unloading (above).

Interviews conducted with representatives of corporate facilities, a university, a hotel and a hospital indicate success with these systems in their particular settings. Part II
Zoë Neale
BioCycle January 2014, Vol. 55, No. 1, p. 52

Solid Waste District Pilots Dry Fermentation Digester
The SmartFerm containers, now manufactured in the U.S., were dropped into place using a crane.

Small-scale anaerobic digester on Monterey Peninsula is processing 5,000 tons/year of source separated organics. Power is sold to an adjacent wastewater treatment plant.
Abbie Beane
BioCycle November 2013, Vol. 54, No. 11, p. 32

Anaerobic Digest
Rosendale Dairy's digesters in Pickett, Wisconsin

BioCycle October 2013, Vol. 54, No. 10, p. 12

Agricultural Anaerobic Digestion In The U.S.
Figure 2. Technologies at farm AD facilities

The number of digesters at agricultural operations increased in 2012 — although less than 2 percent of dairy and swine operations in the U.S. have AD systems.
Nora Goldstein
BioCycle September 2013, Vol. 54, No. 9, p. 41

 

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Entrepreneuring In The AD Industry
Four quasar digesters upgrade biogas to “qng” compressed natural gas, which retails for an average of $2.25/gasoline gallon equivalent (fueling station at left). About 30 quasar vehicles, including some tanker trucks, are equipped with CNG engines (see arrow above).

What seemed like a “slam dunk” in 2006 — bringing the European model of digester success to the U.S. and rapidly building a company — turned out to be a longer haul, but one that has been rewarding for quasar energy group.
Nora Goldstein
BioCycle September 2013, Vol. 54, No. 9, p. 44

Art And Science Of Digester Heat Exchange
Combined heat and power (CHP) systems produce both thermal and electric energy. The unit selected is dependent on the amount of heat required and the goals of the AD facility.

Providing sufficient thermal energy is a fundamental requirement to successful AD operation. This primer reviews temperature requirements and methods to attain and maintain recommended values.
Kevin Jankowski
BioCycle May 2013, Vol. 54, No. 5, p. 36

 

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Codigestion Research Builds Facility Operator Confidence
Figure 2. Nutrient limits in food waste digestion

Research can improve the economic viability of codigestion facilities and ease concerns of managers of water reclamation facilities about receiving additional organic waste and the potential for digester upsets. Part II
David L. Parry
BioCycle May 2013, Vol. 54, No. 5, p. 32

 

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Farm Digester Evolution In Vermont
Maplehurst Farm in Greensboro installed a 300,000-gallon RCM digester to process manure from about 375 dairy cows. Recently, it was approved to receive off-farm feedstock to boost biogas production.

With over 15 operating anaerobic digesters and several innovative power purchase incentive programs, Vermont provides an opportunity to assess what is required
to advance AD in the agricultural sector.
Nora Goldstein
BioCycle February 2013, Vol. 54, No. 2, p. 28

Anaerobic Digest
New digester for Port of Tillamook Bay industrial park

TweetBioCycle November 2012, Vol. 53, No. 11, p. 17 Diamond Bar, California: RFP For Emission Control Technologies For Biogas Engines The South Coast Air Quality Management District (AQMD) has released an RFP to solicit proposals for the deployment of selective noncatalytic reduction (SNCR) emission control technologies for internal combustion engines operating on landfill and/or digester

Anaerobic Digester Expands Treatment Options
The Food to Fuel project takes waste grease and oil from restaurants and food processing facilities and separates the oil from the water (left) to produce a heating oil. Residuals from that process, along with food waste and municipal sludge, are anaerobically digested in a 1.23 million gallon Biothane continuously-stirred reactor (below).

What began as a septic tank pumping company in 1955 has expanded into a full-service wastewater treatment company — and renewable energy producer.
Barb Culton and Richard Mattocks
BioCycle September 2012, Vol. 53, No. 9, p. 41

 

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Anaerobic Digest
Fremont (Michigan) Community Digester project

BioCycle July 2012, Vol. 53, No. 7, p. 14

Anaerobic Digestion In The Northwest
Anerobic digester, Lochmead Farms, Junction City, Oregon

In addition to dairy digesters, some operated as codigesters, two projects in development are designed to process source separated food waste streams.

Dan Sullivan
BioCycle March 2012, Vol. 53, No. 3, p. 33

Wastewater Treatment Facilities As Renewable Resource Centers
Seattle, King County Wastewater Treatment

One of the great public health triumphs of the last century — wastewater treatment — is poised for transformation into a community sustainability centerpiece.

Sally Brown
BioCycle March 2012, Vol. 53, No. 3, p. 41

 

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County Clusters Farms For Renewable Power Project
Dane county dgiester tanks

Green energy, job creation, dairy manure management and environmental protection all factor in to community digester in Dane County, Wisconsin.

Dan Sullivan
BioCycle February 2012, Vol. 53, No. 2, p. 31

 

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Farm Digester Industry In America
Figure 1. Anaerobic Digester Projects 2000-2011

Growth in facility installations is steady, but lack of capital and antiquated energy policies remain obstacles to realizing the broad suite of benefits that manure-based digester systems could achieve.

Allison Costa and Chris Voell
BioCycle February 2012, Vol. 53, No. 2, p. 38