Integrating Anaerobic Digestion With Composting
The Hengelo, Netherlands plant employs a continuous plug-flow anaerobic digester integrated into a larger composting operation. The digester, supplied by Organic Waste Systems, processes one-quarter of incoming feedstock on a half-acre footprint at the facility. Photo courtesy of OWS

Which is better for managing source separated organics, anaerobic digestion or aerobic composting? “It’s not an either-or proposition,” suggest the authors.
Tom Kraemer and Scott Gamble
BioCycle November 2014, Vol. 55, No. 10, p. 32

Utility Powers Up Anaerobic Digester
Delivery trucks unload feedstocks, sourced from a 60-mile radius of the plant, inside the receiving and preprocessing building. Solids are moved via an automatic crane (inset).

Hometown BioEnergy, LLC, a subsidiary of the Minnesota Municipal Power Agency, has capacity to produce 8 MW of electricity at its anaerobic digestion plant.
Dan Emerson
BioCycle November 2014, Vol. 55, No. 10, p. 48

 

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Digester Closes Loop For Bay Area Hauler
Over half of South San Francisco Scavenger Company’s fleet of collection trucks is equipped with CNG engines.

A dry anaerobic digester, with two composting tunnels, was constructed at a transfer station to process 11,200 tons/year of source separated organics.
Nora Goldstein
BioCycle November 2014, Vol. 55, No. 10, p. 50

 

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Permitting Bioenergy Projects In California
CleanWorld high solids anaerobic digester in Sacramento (CA), located at a solid waste transfer station.

Panel discussion provides insights into how to successfully maneuver through California’s stringent requirements for projects such as anaerobic digestion.
Marsha Johnston
BioCycle November 2014, Vol. 55, No. 10, p. 52

Call For Papers: BioCycle West Coast Conference 2015
006biocycle_westcoast_2015

BioCycle West Coast Conference 2015 in Portland, Oregon, April 13-16, 2015 is now accepting abstracts.

Opening Plenary Session, BioCycle East Coast Conference 2014
BioCycle East Coast Conference 2014 Opening Plenary

Unedited video from opening plenary session of BioCycle East Coast Conference, October 28, 2014.

Testing Low Cost AD Systems
BARC’s dairy research unit includes 110 milk cows. A scraper system removes manure from the barn (1), which is then pumped (2) to a separator. Liquids are anaerobically digested (3) and manure solids are composted nearby (4).

Field trials at USDA Beltsville Agricultural Research Center are testing six Taiwanese-style digesters, each treating up to 42 gallons of manure daily. A variety of studies have been conducted.
Stephanie Lansing and Walter Mulbry
BioCycle October 2014, Vol. 55, No. 9, p. 44

Anaerobic Digester Good Fit For Rendering Plant
A tanker truck delivers grease trap waste from restaurants in the area to the digester facility at North State Rendering.

California renderer installs digester system to process plant’s wastewater and grease trap waste, as well as additional food residuals streams. Conditioned biogas will fuel collection trucks.
Soren Rasmussen
BioCycle October 2014, Vol. 55, No. 9, p. 48

 

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Dairy Digester Opens Doors On Maryland Farm
The covered lagoon digester has a capacity of 680,000 gallons. It treats dairy manure in addition to food wastes, such as chicken and meatball fat and ice cream waste.

The Kilby family in northeastern Maryland operates a dairy farm, ice cream and milk processing plant, ice cream parlor — and an anaerobic digester.
Stephanie Lansing and Nora Goldstein
BioCycle September 2014, Vol. 55, No. 8, p. 66

Advancing Organics Recycling On The East Coast
Demo plots have been installed on the Turf Valley Country Club grounds (adjacent to Conference hotel) to compare standard treatment for turf establishment to “suburban subsoiling” via decompaction and compost amendment. Inset image features core sample of soil prior to treatment.

Meeting demand for organics processing infrastructure, building climate-resilient communities and restoration of the Chesapeake Bay watershed are hot topics for discussion at BioCycle East Coast Conference 2014.
Nora Goldstein
BioCycle September 2014, Vol. 55, No. 8, p. 28

Equipment News
Yuengling Brewery's 2G CENERGY cogeneration power plant.

BioCycle September 2014, Vol. 55, No. 8, p. 88

Anaerobic Digest
Geomembrane Technologies Inc. (GTI) installed a floating gas collection cover over the complete 4-acre surface of the Tulare, California's digester.

BioCycle September 2014, Vol. 55, No. 8, p. 20

Anaerobic Digest
Barrett’s Mill Anaerobic Digester (BMAD) facility in Shropshire, England, built by Evergreen Gas in 2012.

BioCycle August 2014, Vol. 55, No. 7, p. 20

Digested Dairy Manure To High-End Potting Soil
Magic Dirt is blended with natural recycled materials and packaged in one cubic foot bags that are currently sold in Idaho and parts of several other Western states.

An anaerobic digester development company launched a bagged potting soil product to utilize digested dairy manure fibers and improve long-term success of facilities.
Nora Goldstein
BioCycle July 2014, Vol. 55, No. 6, p. 48

Winning With Zero Waste
Zero waste sports

In the sports greening arena, the adoption of recycling and composting programs is proceeding at an increased pace. To ensure efficient and effective implementation, buy-in must occur at all levels of an organization, starting at the top.
Nate Clark
BioCycle June 2014, Vol. 55, No. 5, p. 21

BioCycle Equipment & Systems Directory 2014
BioCycle_Equipment_Systems_Directory

A guide to equipment and services for the composting, anaerobic digestion and organics recycling industries.

Contaminant Removal Strategies
Figure 2. DODA BioSeparator

Separation of materials requires identifying the appropriate characteristic by which sorting can be done, and optimized. Key separation characteristics are size, weight, density, hardness, magnetism, electrical conductivity and light refraction.
Craig Coker
BioCycle June 2014, Vol. 55, No. 5, p. 46

 

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“Food Waste To Watts” Organics Pilot
Commercial organics collected by Recology were unloaded in a bunker at the Humboldt Waste Management Authority’s transfer station for transport to a composting facility about 150 miles away.

An institutional and commercial organics collection program in Eureka, California, diverted 760 tons of food waste in a year-long trial.
Marsha Johnston
BioCycle June 2014, Vol. 55, No. 5, p. 38

 

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Call For Papers — BioCycle East Coast Conference 2014
bcec14

BioCycle East Coast 2014 will cover all facets of organics recycling — organics separation and collection, composting and anaerobic digestion, compost and biogas utilization and markets, technologies and systems — for the municipal, commercial, institutional, agricultural and industry sectors.

AD Financing In The United Kingdom
Anaerobic Digester financing

Understanding of anaerobic digestion has increased, and the technology has demonstrated its viability and ability to produce attractive, steady returns for investors.
Charlotte Morton
BioCycle May 2014, Vol. 55, No. 4, p. 43

From Casino Kitchens To On-Site Digester
The casino recently installed a Grind2Energy unit that grinds the food waste and pumps the slurry into an on-site 2,000-gallon storage tank.

Preconsumer food waste from the Potawatomi Bingo Casino in Milwaukee, along with feedstock from local generators, is processed in the Potawatomi Community’s new anaerobic digester.
Dan Emerson
BioCycle May 2014, Vol. 55, No. 4, p. 40

 

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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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Digester Fueled By Postconsumer Organics
The receiving building houses a bioseparator to remove packaging and other contaminants.

The JC-Biomethane anaerobic digester in Junction City, Oregon, processes source separated organics from the Portland region. Digested solids are composted at an adjacent facility.
Katrina Mendrey

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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Anaerobic Digest
Anaerobic Digest

BioCycle February 2014, Vol. 55, No. 2, p. 13

Anaerobic Digest
Zero Waste Energy Development Company's large-scale commercial dry fermentation anaerobic digestion and composting facility in San José, California.

BioCycle January 2014, Vol. 55, No. 1, p. 20
San José, California: Mixed Organics AD, Composting Facility Opens For Business • Albany, New York: Green Bank Receives Needed Funding • Littleport, Ely, United Kingdom: Produce Grower Starts Up Anaerobic Digester • Waltham, Massachusetts: Harvest Power Announces New CEO • Quito, Ecuador: Brewery Invests In Second Digester • Cleveland, Ohio: Stadium Food Waste To Campus Digester • Batavia, New York: Ag Park Digester Wins $2 Million Grant

Biogas Potential In Canada
Figure 1. Biogas energy production potential by source

New study reports that about two-thirds of the potential national biogas contribution would come from
on-farm anaerobic digesters.
Peter Gorrie
BioCycle December 2013, Vol. 54, No. 12, p. 34

Economics Of Dairy Digesters In Washington State
Figure 1: Washington dairies and dairy digesters

Feasibility study supports a shift from the conventional CHP model to a renewable natural gas (RNG) model that takes advantage of the accelerating move to natural gas fuels in the transportation sector.
Nicholas Kennedy
BioCycle November 2013, Vol. 54, No. 11, p. 36

Framework For AD Project Development
Figure 2. Consecutive stages of anaerobic digestion

From conception through end use, a new UK publication covers key topics for setting up and operating an anaerobic digestion plant.
David Riggle
BioCycle November 2013, Vol. 54, No. 11, p. 43

 

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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

Tapping Hidden Energy In Organic Waste
Kenneth L. Kimmell

Kenneth Kimmell, Commissioner of the Massachusetts Department of Environmental Protection, shares insights on anaerobic digestion potential in an interview with the American Biogas Council.
Patrick Serfass and Nora Goldstein
BioCycle September 2013, Vol. 54, No. 9, p. 28

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

Why Is A Real Estate Giant Bullish On AD?
Forest City is majority owner of the anaerobic digesters built with quasar energy group. A newly constructed facility in Buffalo, New York (left) is sized to generate 765 kW/hour.

Forest City Enterprises, one of the nation’s largest real estate developers, is investing in anaerobic digestion to reduce energy costs and ease the load on municipal infrastructure.
Nora Goldstein
BioCycle September 2013, Vol. 54, No. 9, p. 32

Dedicated Food Waste Digester Opens In Ontario
Harvest Power’s new anaerobic digester in London, Ontario includes three holding tanks for incoming feedstocks, a thermophilic acidification reactor that heats substrates to 131°F where they are held for three days and two mesophilic digesters.

Facility in London, Ontario is ramping up to process 71,500 tons/year of food industry residuals. Digestate will be heat-dried into fertilizer products.
Peter Gorrie
BioCycle September 2013, Vol. 54, No. 9, p. 56

 

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Anaerobic Digest
Anaerobic Digest

BioCycle September 2013, Vol. 54, No. 9, p. 20

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

AD And Biogas Technology Developments In UK
Biogest “Power-Compact” MicroPlant

BioCycle editor highlights some exhibits at the UK’s Anaerobic Digestion & Biogas Association Conference and trade show held in July.
David Riggle
BioCycle August 2013, Vol. 54, No. 8, p. 42

Massachusetts Formally Proposes Commercial Food Waste Ban
Massachusetts Food Waste Ban

The long-anticipated ban on disposal of commercial food waste — along with funding to support anaerobic digestion (AD) — was formally announced on July 10.

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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Anaerobic Digestion In The United Kingdom
Of the UK’s nonwater industry plants, 44 use agricultural feedstocks such as slurries and crops. One example is the Spring Farm anaerobic digester in Norfolk, UK.

The AD sector in the UK has grown exponentially with 108 nonwater industry plants as of April — up from 74 a year ago. The ADBA outlines key steps needed to continue this pace.
Matt Hindle
BioCycle May 2013, Vol. 54, No. 5, p. 41

Anaerobic Digestion And Algal Raceway System
Figure 1. Flowchart of Novel Integrated Farm-Based Biorefinery

Michigan State University integrates AD with other biological processes to convert organic wastes into value-added fuels that are needed to enhance the economic and environmental performance of organic waste management.
Louis Faivor, Wei Liao and Dana Kirk
BioCycle May 2013, Vol. 54, No. 5, p. 29

 

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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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Implementation Realities Of Organics Ban In Massachusetts
Figure 1. Food waste generators in Massachusetts

Anticipated disposal ban on commercial and industrial organics is expected to be added to the state’s existing ban structure. The more pressing issues are ensuring robust generator training and hauling and processing capacity are in place to manage the materials. Part III
Zoë Neale
BioCycle April 2013, Vol. 54, No. 4, p. 34

 

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Improving Economics Of Codigestion
Figure 1. Organic waste tipping fee required based on electricity cost

The economics of an organic “waste to energy” facility are strongly dependent on the waste characteristics,
and costs of digestion and solids processing after digestion. Part I
David L. Parry
BioCycle April 2013, Vol. 54, No. 4, p. 48

 

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Integrated Organics Management In Central Washington
Figure 1. Components of PacifiClean’s organics processing facility

PacifiClean Environmental is building a composting and anaerobic digestion facility about 90 miles from Seattle to process a wide range of source separated organics.
Nicole Rinauro
BioCycle March 2013, Vol. 54, No. 3, p. 52

Anaerobic Digest
SmartFerm digesters at Monterey Regional Waste Management District's ’s integrated waste management complex.

BioCycle March 2013, Vol. 54, No. 3, p. 19

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

Tweet BioCycle February 2013, Vol. 54, No. 2, p. 17 Madison, Wisconsin: Report Assesses Viability Of AD At Swine Operations While installation of anaerobic digesters has been increasing at a steady rate on dairy farms, swine operations have lagged behind, with only about two dozen in operation in the U.S. A new report issued by

Biogas Production And Potential From U.S. Wastewater Treatment
Figure 2. Percentages of biogas utilization technologies in use at WWTPs producing biogas

An extensive data collection undertaking has yielded an improved picture of wastewater treatment plants in the U.S. with operating anaerobic digesters and if and how the biogas generated is utilized.
Maile Lono-Batura, Yinan Qi and Ned Beecher
BioCycle December 2012, Vol. 53, No. 12, p. 46

Managing Codigestion Of Multiple Substrates
A treatment plant built receiving tanks for each source of industrial wastes (above). Generators rent the tanks and are responsible for delivering substrates on a timely basis to allow continuous feeding.

Best management practices adopted by wastewater treatment plant anaerobic digester operators are applicable to farm, industrial and source separated organics codigestion facilities.
Timothy G. Shea and Todd O. Williams
BioCycle December 2012, Vol. 53, No. 12, p. 50

 

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Innovation Key To Biosolids Digestion
Construction of the thermal hydrolysis pretreatment system and digesters at the Blue Plains Advanced WWTP is expected to be completed in 2014.

Facility scheduled for completion in 2014 at Washington, D.C. treatment plant will utilize thermal hydrolysis and anaerobic digestion — and produce 11.8 MW of power.
Diane Greer
BioCycle October 2012, Vol. 53, No. 10, p. 42

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

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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Connections: Almost Magical Microbes
Sally Brown

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

Anaerobic Digest

Tweet BioCycle September 2012, Vol. 53, No. 9, p. 19 Washington, DC: USDA Announces AD Funding The United States Department of Agriculture (USDA) Rural Business-Cooperative Service recently announced $14 million in funding for its Value Added Producer Grant competitive grants program. The program is designed to help agricultural producers enter into value-added activities and may

Anaerobic Digest
Anaerobic Digest

BioCycle August 2012, Vol. 53, No. 8, p. 18

Energy Efficiency And Biogas Generation At Wastewater Plants
Central Marin Sanitation Agency cleaned out and is upgrading its existing digesters with membrane covers and pump mixing systems (inside of cleaned digester shown above). Photo courtesy of CMSA

Anaerobic digestion systems are being upgraded to accept food waste and FOG to boost energy generation.
Diane Greer
BioCycle July 2012, Vol. 53, No. 7, p. 37

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

Depackaging Organics To Produce Energy
Depackaging equipment for recovering organics is designed to deal with a variety of materials from plastic wrapping and containers, to wax-coated cardboard and even metal cans and glass bottles.

Systems designed to separate packaging from its contents — in this case food and liquids — are being installed at facilities in the U.S. and Canada.
Dan Sullivan
BioCycle June 2012, Vol. 53, No. 6, p. 42

Building Solutions For Composting, Anaerobic Digestion
The Green Lane Energy anaerobic digester under construction near Junction City, Oregon is using a fabric structure to house its materials receiving and preprocessing operations. Supplied by Legacy Building Solutions, it incorporates structural steel beams.

From feedstock receiving and mixing to finished product storage, organics recycling facilities are investing in fully and partially enclosed structures.
Nora Goldstein
BioCycle June 2012, Vol. 53, No. 6, p. 30

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

Anaerobic Digest
Small dairy sells renewable energy generated from anaerobic digestion.

BioCycle May 2012, Vol. 53, No. 5, p. 14

Anaerobic Digestion

BioCycle April 2012, Vol. 53, No. 4, p. 18
Ontario, Canada: Favorable News On Biogas Feed-In Tariff; Portland, Oregon: Biogas Project Eschews Public Funding; Sacramento, California: High Solids Anaerobic Digester; London, England: Famous Ad Investors In Britain; St. Paul, Minnesota: State Funding For Ad Projects; Rosemont, Illinois: Sustainable Dairy Farmers Honored; Washington, DC: DC Waters Invests $4.1 Billion In Renewables

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

Dairy Digester Evolution In New York State
New York State dairy farm plug-flow digester

Cornell University has been involved with anaerobic digestion systems on dairy farms for almost 40 years. A member of its PRO-DAIRY team discusses the past, present and future of AD in the Empire State.

Nora Goldstein
BioCycle February 2012, Vol. 53, No. 2, p. 41

 

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Digester In Magic Hat’s Sustainability Mix
Magic Hat

With its ability to expand production restricted by BOD discharge limits, Vermont brewer directs its wastewater, spent yeast and grain waste to anaerobic digestion.
Molly Farrell Tucker
BioCycle January 2012, Vol. 53, No. 1, p. 58

 

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Composting, Organics Recycling, Anaerobic Digestion