DIGESTCOMP
Inc.
Specialized in Resource Recovery
Jean-Claude Corbeil
Tel:(450) 689-7588
digestcomp@yahoo.ca
Centralised Québec or Farm Based
Digester Ontario
• Centralised : Danish Model (Québec)
– Take in charge of large volumes from municipalities, farms and
agro industries
– Advantageous if a large industrial heat or energy user is at
proximity Critical in Québec or fuel for truck fleet
– often in relation with farms for the spreading
– Waste Management Process and sale of fertiliser and methane
• On farm : German Agricultural Model (Ontario)
– Manure and organic matter come from the farm and are the
principal substrates
– Producer becomes the recycler of organic matter
– Agricultural Process with spreading
– Sale of electricity to the grid Not possible in Québec
Agricultural Model; with Addition of
Off Farm Material
• The agricultural producers already manage most of the organic waste
of our society 94% +
• The off farm increases production of biogas (2 to 3 times)
• Possibility of tipping fees for taking charge of the waste
• Digestion is an integrated part of the waste management cycle
• Production of electricity with surplus sold to the grid
• The farms can be tagged as a waste management sites, this can
project a bad perception
• In Ontario the regulation is finalised by OMAFRA and MOE
25% of off farm material and certain agro alimentary matters
are accepted without environmental CA
Major Types of Anaerobic Digesters for
Agricultural & Livestock Wastes
DANISH MODEL
INVOLVES:
• LARGE CENTRALISED SITES
Combining Industrial & Agricultural Models
• THE TRANSPORT OF ORGANIC
MATERIAL TO A CENTRALISE SITE
FOR RECEPTION & DIGESTION
• The valorisation of organic waste
• The generation of energy
• Economies of scale
CENTRALISED DIGESTION
• PRE TREATMENT Dewatering Centers (Mobile & On Site,
Centralised)
• Collection & Transport of organic material to AD
• Central Reception, storage, mixing co substrate (indoor for
odour control)
• TREATMENT Anaerobic Digesters (Wet & Dry)
• POST TREATMENT Separation
• Pathogen & Weed Elimination by
-Aerobic Digestion of Solids (compost, fertilizer, bedding)
-Evaporation of Liquids ( concentrated liquid fertilizer)
-Screen solids & sell
WHY LOOK AT MUNICIPAL
DIGESTION & COMPOSTING ?
Out of 100,000 tonnes of waste handled by a city annually
Approximately 40,000 tonnes, or 40%, are organic;
12,500 tonnes Biosolids
15,500 tonnes Organic Waste
12,000 tonnes Leaf/Yard Waste
In order to make full-scale organics digestion and
composting feasible from a solid waste
perspective cities have to look at biosolids.
Central Digesting Site
Dry Anaerobic Digester
IN VESSEL DIGESTING
BUILDINGS
COVERED WINDROW OR
OPEN AIR MATURATION
WHY LOOK AT THE CENTRALISED
MODEL ?
-PROFITS (GENERATE REVENUES WITH MANURE & TIPPING FEES
WITH MUNICIPAL & INDUSTRIAL WASTE )
- PROTECTION OF THE ENVIRONMENT
- TREATMENT(PRE & POST TREATMENT) KILLS PATHOGENES AND
WEED SEEDS REDUCING NEED FOR PESTESIDES
- PRODUCES QUALITY FERTALIZERS & COMPOST REDUCING NEED
FOR MINERAL FERTALIZERS LOWERING COST
- IMPROVES RELATIONS WITH NEIGHBOURS
- PROCURES ODOUR CONTROL
- REDUCES FINANCIAL RISK (BANK LOANS, ENVIRONMENT, ETC)
- WE MANAGE WASTE OPERATIONS, FREEING YOU
- MANAGE PHOSPHEROUS LEVELS NEUTRIENT MANAGEMENT PLAN
- We offer cost avoidance in Millions
$
also to the community
Mesophilic Anaerobic Digester
nourish her well, regularly, do not change the menu to rapidly.
ANAEROBIC DIGESTION
TECHNOLOGIES
Pump or Shovel ?
Liquid Substrates
dry mater less than 3%
Semi Solid Substrates
dry mater from 4% to 15%
Solid Substrates
dry mater greater than 20%
Classification According to Dry
Mater or According to Use
• Digesters applied to waste water treatment
from 0,05 to 4% dry matter
• Wet fermentation «Infinitely mixed»
from 5 to 15 % dry mater (DM) ;
• Hybrid fermentation «mixed system»
from 15 to 25 % dry mater (DM) ;
• Dry Fermentation « high solids content »
from 25 to 50 % dry mater (DM) .
Effluent Treatment
Waste water
Abattoir waste
Cheese whey
Pig manure (pilot)
Wet Fermentation
Liquid Manure
Food waste
Vegetable waste
Silage
Etc.
High Solid Fermentation
Solid Manure
Food waste
Municipal waste
Silage
Biosolids
Higher strength Biomass
Wastes can dramatically
increase biogas yield over that
from livestock wastes
Issues for Anaerobic Digestion of HighStrength Food Processing Wastes
- More Complex & Expensive Digester.
- Must retain or recover bacterial
biomass from effluent.
- More Operator Training & Attention.
- Prone to acidification and failure.
- Can produce high biogas yield & quality.
- Increased Economic Return.
SOLUTIONS
• Phased digestion
• Hybridation - solid - liquid (UASB)
- solid - infinitely mixed
- infinitely mixed - liquid (UASB)
• Build Own Operate
• Coop’s, agricultural and municipal joint
ventures
• Alternative Fuel Use other than electricity
Hybridisation
Wet Digester
Hybrid AD’s
Dry Digester
Hybridised High Solid Anaerobic
Digestion
Dry Digester
Wet Digester
Anaerobic Digestion of HighSolid Municipal
Wastes BEKON Process (Munich, Germany)
Biogas Use
Energetic Equivalence of one cubic
meter of methane
Biomethane &
Natural Gas Vehicle
Dual Fuel
Vehicle
Co Generator
Proposal for Ontario Biogas
Programs
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Continue subsidising Phase 1 feasibility studies
Pay fare price for Green Energy
Under 100 KWh
$0,22
101 to 250 KWh
$0,20
251 to 500 KWh
$0,18
Over 500KWh
$0,16
Remember Biogas not only produces clean
power, 24\24, it also depollutes
Merci