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Anaerobic Digestion ABC's

California Cap-and-Trade Wars

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ADDING BIOMASS: The methane yield ranges for a number of possible crop feedstocks.


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Report says biomass crops can enhance anaerobic digestion. 

Adding Value to AD 

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From Budgets to Biomass Gasification and Combustion

The U.S.'s potential for CHP from biogas has attracted a European technology manufacturer.

Biogas Bevvy

ENERGY CENTER: The Bioenergy Research Demonstration project on the University of British Columbia campus in Vancouver will produce 2 megawatts of power and 10,000 pounds per hour of steam. 

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Scott Hasse, a senior engineer with NREL, conducted research into biomass gasification and combustion technologies.

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NEXT FOR NEXTERRA: Gasification system developer Nexterra will provide the equipment and design for a gasifier at Vancouver's University of British Columbia.

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JENBACHER GENERATION: The Nexterra Product Development Center employs a GE Janbacher engine. 

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A 2009 NREL assessment of biomass combustion and gasification technologies may not have spurred rapid commercial development, but it has encouraged state investment in demonstration projects.

Inspiring  Investment 

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FEEDSTOCK FRIENDLY: India has a wide variety of agricultural residues available for bioenergy production including rice and cotton straw, coconut husks and bamboo waste.

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India's biomass gasification sector is growing by leaps and bounds, seemingly at all levels, and it's raising hope for the establishment of electricity in rural villages. 

Biopowering India

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William Strauss, president of FutureMetrics, produced this study to point out flaws in the Manomet Center for Conservation Sciences' woody biomass carbon accounting method.  

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Figure 1: The biomass curve assumes a 30-year growing cycle with dedicated sustainable forests so that no new net CO2 is released by combustion for 30 years after biomass facilities that started in 2011.
The coal curve is business as usual.
The model

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Figure 2: The biomass curve assumes that the biomass used in 2011 is from sustainable forests that have already sequestered the CO2. 
The model assumes a 2.5 percent annual growth rate in demand.
Improved silviculture increasing yield per acre is ass

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Figure 3: The biomass curve assumes that the biomass used in 2011 is from sustainable forests that have already sequestered the CO2. 
The coal curve is business as usual.
The curves assume a 2.5 percent annual growth rate in demand.
Improved silvicul

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CARBON CONCLUSION: If biomass is harvested from existing forests that will be sustainably managed in the future, there is no carbon debt.  

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Wood-to-energy from sustainably managed forests can provide net-zero carbon emission or even positive carbon sequestration if the woody biomass stock is not depleted or grows over time.

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