Expanding AD Capacity In The UK
Basingstoke, Hampshire

After raising $160 million in 2012, Tamar Energy Ltd set out on an aggressive plan to build 40 anaerobic digestion facilities over the next five years, and generate 100 MW of green electricity.
David Riggle
BioCycle March/April 2014, Vol. 55, No. 3, p. 62

 

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Composting, Organics Recycling, Anaerobic Digestion

 

High Solids Anaerobic Digestion + Composting In San Jose
The four in-vessel composting tunnels (one shown on left in photo) are next to one of the banks of digesters (to the right). Content of two digesters fills one composting tunnel.

Housed inside a 100,000 sq. ft. building at the southern edge of the San Francisco Bay, a dry fermentation
AD system with composting bays is processing commercial organics from the City of San Jose.
Nora Goldstein
BioCycle March/April 2014, Vol. 55, No. 3, p. 42

Aerobic Composting And Anaerobic Digestion
Figure 2. Aerobic and anaerobic conditions (Image courtesy of U.S. Composting Council)

Both processes manage decomposition, carried out by biological organisms transforming the materials through chemical reactions. There are pros and cons to each process, and they can be used in series to enhance the value proposition of recycling organic materials.
Craig Coker
BioCycle March/April 2014, Vol. 55, No. 3, p. 32

 

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BioCycle Editor Nora Goldstein Receives American Biogas Council’s Visionary Award
Nora Goldstein BioCycle American Biogas Council Visonary Award

Two ABC Visionary Awards were presented at BioCycle REFOR13 Conference in Columbus, Ohio.

Anaerobic Digestion Of Compostable Bags
Figure 2. Schematic of the Strabag LARAN® dry plug flow reactor

Dry anaerobic digestion facility in Luxembourg successfully treats mixed yard and food waste collected in compostable plastic bags.
Christian Garaffa and Klaus Gröll
BioCycle October 2013, Vol. 54, No. 10, p. 40

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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Health Care Provider Zeros In On Energy Independence
Figure 1. Gundersen Health’s energy independence plan

Gundersen Health System is using a combination of energy conservation, and on-site and off-site renewable energy generation — including anaerobic digestion — to meet its 2014 goal of being fossil fuel free.
Marsha W. Johnston
BioCycle September 2013, Vol. 54, No. 9, p. 36

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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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

Managing Compostable Bags At Anaerobic Digestion Plants
Figure 3. Amounts (percent by weight) in light fraction after dewatering, manual sorting and chloroform extraction with FT-IR analysis

An analysis was performed in Italy to better understand the interaction of compostable bags with hydropulping pretreatment systems in wet AD facilities. Results show further recovery potential for the residues, with optimization of overall system performance.
Christian Garaffa and Rhodes Yepsen
BioCycle September 2012, Vol. 53, No. 9, p. 37

Connections: Almost Magical Microbes
Sally Brown

Sally Brown
BioCycle September 2012, Vol. 53, No. 9, p. 52

Food Waste Digester In Southern California
Digestion takes place in two continuous stirred reactors.

Diversion of 100,000 tons/year of commercial and industrial solid food waste is anticipated, along with generation of transportation fuel as CNG for 40 to 50 solid waste collection trucks.
John McNamara and George Eowan
BioCycle July 2012, Vol. 53, No. 7, p. 42

 

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Anaerobic Digest
Fremont (Michigan) Community Digester project

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

Renewable Energy Solution For Cheese Producer
Montchevré anaerobic digestion system, renewable energy, Wisconsin dairy

Rising costs and challenges of land application lead Wisconsin goat cheese producer to install a complete mix anaerobic digestion system to treat high strength wastewater.
Diane Greer
BioCycle May 2012, Vol. 53, No. 5, p. 38