Aug 20 Ryans Blandin Foundation Webinar - Presentation Transcript
Opportunities and challenges to biomass harvesting in Canada: An operational perspective Mark Ryans, R.P.F. FPInnovations - Feric Blandin Foundation Webinar Presentation August 20, 2008
Outline
Drivers for bioenergy
Biomass harvest/recovery methods
Harvesting systems determine biomass opportunities
Key cost considerations
Biomass volumes after harvesting
Summary
Interest in forest feedstocks and bioenergy
Drivers:
high energy costs (fossil fuels and electricity),
global warming issues (carbon credits?)
tight hog fuel supply,
provincial government programs to encourage better use of residues and under-utilized species
survival of the industry and northern communities
long-term potential of wood-to-liquid fuel conversion processes, pellets, etc.
Bioenergy is not new to Canadian forest operations
Traditional use of hog fuel and black liquor
Simple supply-chain infrastructure from source (sawmill) to CHP facility
Biomass harvesting operations currently providing feedstock for burning
Burning questions concerning forest feedstocks
How much is available?
What is the sustainable supply?
To which businesses?
How much does it cost?
What harvest and recovery systems are available?
How can biomass quality be improved to suit current and future uses?
Program Themes 2006-2010
Current uses
CHP at pulp and paper mill
Independent power producer
Pellets
Forest biomass sources
Harvest residues*
Under-utilized standing trees*
Sortyard/chipping terminal debris*
Early thinnings and “fire-smart” treatments
Non-commercial stands
Burnt and insect-killed stems (MPB)
Stumpwood
Energy plantations
*operational in Canada
Residues from different harvest systems: - Biomass types and location
Harvest residues:
Roadside-stroke delimber (full-tree)
Landing-DDC (full-tree)
In cutover – harvester (cut-to-length)
The Nordic way
Cut-to-length harvesting systems
Private land with small operating blocks (2 – 5 ha)
Three sources of biomass from the forest:
Recovery of harvest residues within the cutover
Use of stumps
Harvest of small trees
The Nordic way
Key elements to their success:
National policy to promote forest biomass use
Concerted R&D programs
Biomass recovery and harvest systems tailored to their resources and wood harvest systems
Modernized CHP plants to optimize use of forest residues
Guidelines/best practices are in place
CTL residue recovery systems
Cut-to-length harvesting: recovery of debris within the cutover
Bundling or forwarding loose debris with roadside chipping
CTL systems: Residue bundlers/compactors Continuous Batch Compactor – Container system
CTL systems and Nordic practice: - mills tailored for biomass deliveries
Just in time deliveries, covered storage and conveyors
Scaling, receiving and feedstock monitoring
Large central crusher driven by an electric motor
Source: Hakkila, P. 2004. Tekes, Technology Program Report 6/2004.
Canadian residue recovery systems: - full-tree harvesting systems dominate Delimber-debarker-chipper (DDC) - white-wood chips to pulp mill Stroke delimber or roadside processor - tree lengths to sawmill
Recovery of roadside residues Stroke delimber Delimber-debarker-chipper
Full-tree harvest residues: Low-hanging fruit?
Already at roadside or landing
Paid for (?); spending money to get rid of it
Location and condition of road
Level of contamination and moisture content
Integration between conventional harvest and residue recovery
Currently treated as waste
Key Cost Considerations: - feedstock cost is a key to competitiveness
Delivered wood cost to mill is the single largest component of final product cost (40 to 60%)
The delivered costs of forest-origin residues could be higher
Cost factors: - high transportation costs
A Basic Problem:
Transporting a low-value, low bulk-density material with a high moisture content over a long distance
Importance of maximizing payload through comminution and compaction
Photo Credit: Holman - John Deere (FERIC Winning Solutions 2006)
Delivered costs: – Eastern Canada, residues from roadside stroke-delimber Pre-piling Comminution Transport: - 120 km one-way, live-floor chip van Other: - roads, supervision, overhead, maintenance, compliance, stumpage *Cost estimates: FERIC BiOS model
Key Cost Considerations: - high transportation costs
It may be more cost effective to convert the feedstock in the field and transport a denser fuel
Mobile/portable biorefinery or pellet plant
Advanced Biorefinery Inc.
Cost factors: - high comminution costs
High capital cost: $400 000 to $500 000 chipper ; $500 000 to $850 000 grinder with separate loader
Sensitive to contamination, truck scheduling and residue concentration
Low utilization, high fuel consumption
Not designed for working at roadside
Disc chippers
Clean, well-prepared hardwood tops
Drum chippers
Truck or trailer-mounted versions
Larger infeed deck and opening
Less sensitive to contaminants than a disc chipper
Potential use in hardwood and softwood residues
Horizontal grinders
Trailer- and track-mounted models
450 – 735 kW recommended
High fuel consumption
Can handle various feedstocks
Biomass harvest and recovery systems
Recovery systems for roadside debris
Tracked and trailer-mounted horizontal grinders
Hot system vs. cold-decked
Cost factors: - integration within existing management and harvesting operations
Conventional harvest affects the cost and quality of the residue recovery operation
Concentrated vs. scattered debris, contaminates, roads and snow removal, etc.
Cost and quality factors: - moisture content
For CHP and most thermochemical processes, low moisture content is a major consideration
Residue volumes after recovery - biomass flow Merchantable (logging) Potentially available Total biomass Roadside slash Standing residuals Cutover slash Silvicultural and ecological retention Technical usability Harvestable biomass
Forest-origin biomass sources - potential vs. recoverable volumes Potentially Available Technically Usable Total Biomass Economically Viable ?
Biomass yield varies by species Single tree biomass: Black Spruce vs. Jack Pine (DBH: 26 cm, Ht: 18 m) Ontario FRI: Sb90 Pj10 vs. Pj90 Sb10 (Site Class 2, 90% stocking, 100 yr) 17.5 ODT/ha* 7.7 ODT/ha* Recoverable volume FERIC BiOS model
Needles
37
13%
Live Branches
16
6%
Stem Bark
21
8%
Stem Wood
202
73%
Dry Wt: 276 kg
Stem Bark
15
6%
Needles
13
6%
Live Branches
10
4%
Stem Wood
193
84%
Dry Wt: 231 kg
Biomass recovery on full-tree site, Kapuskasing, ON Black spruce stand Potentially available 50.5 odt Roadside slash 32.6 odt Standing residuals 2.5 odt Cutover slash 15.5 odt Recovered biomass 25.2 odt
Biomass recovery on full-tree site, Kapuskasing, ON Mixedwood stand (low hardwood utilization) Potentially available 131.0 ODt Roadside slash 40.5 ODt Standing residuals 47.8 ODt Cutover slash 42.7 ODt Recovered biomass 31.9 ODt
Future outlook: Greater need for forest-origin feedstocks Pulp mill to forest biorefinery (Paprican Division) Wood-to-liquid fuel/wood-to-power and heat processes become commercial reality Wood chips Chemicals Sawmill residuals Pulp Emissions Landfill solid waste Effluent Forest residues Fuels Chemicals Power
Other factors
State of the industry and availability of capital
Wood-to-liquid fuel processes are still years away
Current low value of forest residues that have a low bulk density and high moisture content resulting in high delivered feedstock costs
Capital costs for a small contractor to get into the business are very high
50000 ODt contract requires over $2 million in capital costs and another $2 million in operating costs
Sustain or create 11-12 jobs
Summary and opportunities
Bioproduct opportunities based on forest feedstocks will revolutionize the way we view and manage the forest
A new product stream from our woodlands operations (reduced cost of all feedstocks)
Biomass harvesting can lead to actual increases in current merchantable volumes
Silvicultural improvements through biomass recovery can lead to a more valuable forest
Sustainable levels must be established
Summary and opportunities
Lots of biomass around but economically- viable volumes need to be established
Bioenergy/bioproduct opportunities will make us rethink our traditional approaches to harvesting
Biomass harvesting will create/sustain woodlands jobs
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