SLIDE 1
Renewable Natural Gas
1
A small-scale process to convert agricultural and organic residuals to pipeline-quality renewable natural gas (“RNG”)
April 2017
SLIDE 2 Renewable Natural Gas
2
Organic waste from food processing facilities, grocery stores, food distribution companies, bakeries, confectionary processing facilities, dairies and facilities that process dairy products, fruit and vegetable processing facilities, cereal and grain processing facilities, oil seed processing facilities, snack food processing facilities, snack food manufacturing facilities, breweries and other spent grains, wineries and beverage manufacturing facilities, fruit and vegetable packing facilities, milling facilities, DAF material from water and waste water treatment plants, kitchen
- rganic material, livestock, aquaculture, and paunch manure, glycerol and by-
products from ethanol, biodiesel, breweries, and distillery plants, FOG, crop residuals (i.e., corn silage), herbaceous plant material from greenhouse, nurseries, garden centers & flower shops. Raw Materials:
SLIDE 3
Example
3
Vermont
SLIDE 4 Southern Ontario Examples
4
Chatsworth, Grey County Grimsby, Niagara Elmira, Waterloo
“We offer an entirely new future for
- rganic waste management. No
- dour.
No even any
- dour
- complaints. Not one. Year after
- year. No one has ever done this
before, at large scale, in an urban setting. We have permanently changed the conversation about
- dour. It no longer needs to be
accepted or managed--with us, there is no odour.”
SLIDE 5 Process Summary
5
- Biomethanation is an enclosed fermentation process.
- Agricultural residuals and food reject materials are slowly fermented in
an enclosed vessel.
- Examples: potato and fruit cull materials / silage / stover / manures,
food by-products, etc.
- The enclosed fermentation captures methane and carbon dioxide.
- The gases are purified, and the pure methane is compressed and
injected into the nearby Enbridge Gas pipeline.
SLIDE 6
Process Chemistry
6
SLIDE 7 Project Specifications
7
Footprint: 2 hectares Building footprint: < 500 m2 Zoning: Industrial Employment: 2-4 persons Capex: $5-8 million Raw Materials:
- approx. 50,000 tonnes/year (5 truckload/day)
Utilities: Natural Gas / Electrical / Water (non-potable)
SLIDE 8
Engineering & Operations
8
& An Ontario Municipal Utility Corporation
SLIDE 9
Renewable Natural Gas
9
Production of : 2,400,000 M3 RNG/year (91,000 GJ) Equivalent to energy use in : 900 households
SLIDE 10 10
The Opportunity – Renewable Natural Gas (RNG)
- Environmentally Positive – Net Neutral if 100% RNG
- Safe
- Affordable
- Convenient
- Proven
Substituting only 6% of traditional natural gas represents approximately 14 TWh Equivalent – enough energy to meet the electrical needs of approximately 1.5 million homes for a year Approximately six per cent of Ontario’s total greenhouse gas emissions come from the residual materials sector and 90 per cent of this is from landfilled materials. This gas is primarily methane generated by decomposing organic materials, which has a global warming potential 25 times greater than carbon dioxide (CO2). If Ontario is to seriously tackle climate change, including making progress on the Climate Change Action Plan, preventing greenhouse gas emissions from landfill must be a priority.
SLIDE 11 11
Utilities Working Together
Enabling a Low Carbon Future with Gas and Electric Utilities
SLIDE 12 12
Injecting RNG into Gas Network
Existing Gas Line Being Assessed to Accept RNG from Petawawa Power Corp
X
SLIDE 13
Digestate
13
The process liquids after fermentation are qualified as fertilizer and delivered back to the farms from whence raw material is sourced – a closed loop. NPK present in the raw feedstock remains in the digestate.
SLIDE 14 Emissions
14
Sound: Negligible Water: None Air/Odour:
- Negligible. MOE Emission Limits respected by way of:
Good Housekeeping / Carbon Filters / Biofilter. Anaerobic digestion reduces odours by a factor of 10x compared to composting. Digestate: Fertilizer grade material Enhances fertiliser value because:
- Pathogens killed; and
- Odour reduced – organic substances removed and captured.
SLIDE 15 Odour Emissions
15
Odour that is produced by the process, can and will be contained. The ventilated air is filtered to remove any odour, before it is released through the ventilation system. Odour Management:
- State-of Art filtration and ventilation system imposed by MOECC;
- Negative pressure within building directs air to filtration;
- Good Housekeeping – keeping site clean;
- Continuous monitoring required;
- Odour-Tight Reception Tanks & Gas-Tight Operation;
- No open storage of materials;
- All truck movements in enclosed vehicles.
SLIDE 16 Odour Emissions - example
16
Blue contours = less than 5% of the threshold
Odour Assessment Clapham Lodge Anaerobic Digestion Plant REC Report: 33511r2 Issued: 10th July 2013
SLIDE 17 Environment
17
- 1. Odour contained within site;
- 2. Small footprint;
- 3. Little traffic;
- 4. Closed water loop;
- 5. Consistent, Complementary and Supportive use to existing facilities in Eco-Park;
- 6. Fossil-Fuel-Free Energy:
- A. Supporting Federal Clean Fuel Standards;
- B. Supporting Ontario’s Waste Free Act;
- C. Supporting Enbridge to “Green the Grid”;
- D. Capturing high greenhouse-gas methane emissions.
- 7. Assists with Municipal and County recycling requirements.
8.
SLIDE 18
Site Considerations
18
A less desirable location in the Eco-Park is acceptable, close to the sewage lagoons.
SLIDE 19 Next Steps
19
- 1. Open House;
- 2. Council Agreement;
- 3. Permitting / Engineering, Including:
- Odour / Noise / Traffic studies and reports;
- Zoning Approval (public process);
- Grand River Conservation Authority approval;
- Ministry of the Environment and Climate Change Approval (public process).
- 4. Construction;
- 5. Operation 2018/2019.
