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4/14/2015 Brought To You By: This webcast is sponsored by Corollo Engineers. 1 4/14/2015 Wasted Food to Energy: How Five Water Resource Recovery Facilities are Boosting Biogas Production and the Bottom Line April 15th, 2015 1:00 3:00
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the Questions pane.
for replay shortly after this webcast.
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Moderator: S arah Deslauriers, P .E. sdeslauriers@ carollo.com Program Manager, California Wastewater Climate Change Group Chair, WEF Residuals & Biosolids Carbon Resource & Recovery S ubcomittee
www.carollo.com
koda
anitation Agency, Jason Dow
heboygan WRRF , S haron Thieszen
, Chuck Rogers
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0.8% U.S . electricity use
largest $’s for POTWs
producers of energy
. WRRFs use anaerobic digestion & 85% beneficially use biogas; 22% generate electricity
Biogas to energy proj ect in Birmingham, England (Popular S cience Monthly, March 1922)
MS W by percentage after recycling & composting (U.S . EP A, 2014) Carbon footprint of food waste options (WERF , 2012)
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Sharon Thieszen Superintendent, Sheboygan Regional WWTF
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hore of Lake Michigan
ludge with Biological P Removal and backup Ferric Chloride Addition
Recovery, and Combined Heat & Power
torage of AD Biosolids and Biosolids Drying & S torage
Grand Award - Net Zero Energy
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2006
Partnered with Alliant Energy - installed biogas conditioning and turbines; 300 kW, 1MMBtu/ hour heat
2010
Installed additional biogas conditioning and turbines; 400 kW, 1.4MMBtu/ hour heat
2006
Co-digestion program increased biogas
2005
Energy conservation initiatives & Co-digestion implemented
2012
Purchased biogas conditioning equipment and turbines from Alliant Energy - City recoups all cost savings from biogas to energy systems
30 kW Capstone Turbines
recovery
produced is used onsite to power equipment and heat the digesters and plant buildings in the winter
Alliant Energy-Wisconsin Power & Light funded the turbine proj ect and recovered costs through the sale of generated electricity to the WWTF
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Unused Digesters
Waste
Access
Grease Trap (Industrial) Food Additives Whey Processing Cheese Processing Ethanol Processing Waste Urea
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R S In-line S trainer HS W Feed Pump HS W Unloading
200 kW Capstone Turbines
recovery
Excess Biogas
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trength Waste
Methane
avings: $270,000 annually (2013)
$0.05/ kwh=$250,000; $0.51/ t herm=$21,000
Electrical Needs & 85% Heating Requirements
$- $50,000 $100,000 $150,000 $200,000 $250,000 $300,000 $350,000 5,000,000 10,000,000 15,000,000 20,000,000 25,000,000 2010 2011 2012 2013 2014 Gallons VOLUME (GAL) REVENUE ($)
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Project Project Cost Funding Assistance City's Cost
Co‐digestion $75,000 $0 $75,000 CHP Phase I $1,200,000 $899,000 Alliant Energy $301,000 CHP Phase II $1,500,000 $205,000 Grant $1,295,000 Total $2,775,000 $1,104,000 $1,671,000
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2005
heboygan only regional HS W program
ignificant grant money available
2014 – BOD Wars
HS W from one supplier
ignificant capital improvements to continue HS W and co- digestion
50,000 100,000 150,000 200,000 250,000 300,000 350,000 400,000 450,000 500,000 2015 2020 2025 2030 2035 Required Annual Revenue (2014$) Year Discont inue HS W Receiving and Elect ricit y Generat ion Sustain Exist ing HS W Receiving and Biogas Ut ilizat ion Increase HSW Receiving and Biogas Ut ilizat ion
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Consumption
S ustainability & Being a RES OURCE RECOVER Y F ACILITY
S haron Thieszen S uperintendent, S heboygan Regional WWTF sharon.thieszen@ sheboyganwwtp.com (920) 459-3964
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to accept waste from 20 canneries in the service area
canneries
million gallons/ day
60 million gallons/ day
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Increased recognition from potential competitors of the energy value
1 truck/day will power 260 homes
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Energy Generation
One digester can process ~ 200 ton/day of food waste Digester gas to be converted into renewable energy 200 ton/day of food waste ≈ 2 MW of energy
2005: Begin to accept small amounts of food waste 2006: Reliable acceptance of 20 tons of food waste per week
2011: Contract signed with Recology 2014: Oakland votes to send commercial food waste to EBMUD
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will power 260 homes
credit opportunities
tandard
– Nature of contamination – Variability in control of
the waste stream
still evolving
– No existing regulations
fit
– Current best fit:
Biosolids Composting at POTW
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Dewatered Solids Land Application
Dewatering
Digested Solids
Digestion Food Waste Pre-processing
Slurry Food Waste
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to land application
to ADC
regulatory oversight by new agencies— CA Dept. of Food and Agriculture (CDF A) for FOG wastes and CalRecycle/ Local Enforcement Agency for food waste.
appropriate regulatory pathway.
NPDES program framework administered by the S tate Regional Water Boards.
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1,700 tons/ day
ustainable, local, high methane value feed stock
term (10+ year) contracts
ignificant interest from local communities in regards to landfill diversion and renewable energy
credits via destruction of methane gas (as compared to alternative)
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April 15, 2015 Jason Dow, P .E. General Manager Central Marin S anitation Agency
WEF Wasted Food-to-Energy Webinar
April 15, 2015
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A and Marin S anitary S ervice
S
tation Improvements
S
A
Central Marin Food Waste Biogas (methane)
Anaerobic digestion
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Anaerobic Digesters at CMSA CO2 Biosolids Electricity for CMSA and future sale Soil Amendment and Fertilizer Methane Engine/Generator Food Waste Receiving and Separation at MSS Transfer Station Solid Food Waste
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California
percent of the Commercial waste stream
residential solid waste sent to Landfill by MS S , is food
.
Central Marin Sanitation Agency
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tudy - proj ect by CMS A, S an Rafael, and MS S (2008/ 2009)
S upervisors (2009 and 2012)
executed in 2013
S and CMS A
2013/ early 2014
company
collection, recycling, and organics services to Marin County since 1948.
erves nine j urisdictions within the County of Marin
erves ~30,000 residential and 3,000 commercial/ multifamily dwellings.
recyclables annually
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waste
taff Training & Monitoring
uccess
ignage
Removes visible contaminants from cart prior to dumping Removes visible contaminants from cart as contents tipped into truck Removes contaminants after tipping on floor
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would be collected and then transferred to the MS S transfer S tation for processing to remove contamination and then transported to CMS A.
consumer food waste
food waste producers
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37.26 81.46 95.45 81.66 77.4 98.37 118.83 110.78 102.53 105.91 89.29 106.3
20 40 60 80 100 120 140
2014 Food Waste (Tons)
Customers 102 Collection Days 6
4.1
132 lbs.
4.3 tons
an Rafael, Marin County
erves about 120,000 people and S an Quentin S tate Prison
A) with four satellite collection agencies
(ADWF) to 116 MGD (PWWF)
an Quentin Village
Q prison and Corte Madera
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Biogas Biogas Cogen Digester Solids Treatment Capacity Electrical Power to Plant Biogas Supply 27 % 100 % Excess Capacity Excess Capacity
2nd Cogen unit, fuel cell, or Microturbine
FOG & Food Waste FOG & Food Waste 54 %
5,000-gal FOG and 20 tons of Food Waste 600 kW (Plant load)
Export Power Above 600 kW Plant Load 68 %
Additional Food Waste Additional Food Waste
20 tons of Food Waste 750 kW (Existing Cogen capacity)
WW Solids WW Solids Two Existing Digesters (with improved mixing) Cogen
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S regulated by CalRecycle, and CMS A is regulated by the S an Francisco Bay Regional Water Board and Cal Recycle.
Volume Transfer Operation permit for CMS A, and a S
Transfer S tation Permit amendment for MS S .
A Notified S FR WB that the facility is operational
permit S tandard Operation Procedure (S OP) developed
A until CalRecycle regulations change to exempt POTWs that receive organics for co- digestion.
the new organic loading
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225,000 ft 3/ per day average.
for FOG; 91% for food waste
7-9 hours/ day up to 16 hours/ day.
A facility cost: $2 million ($1.9 for construction)
S equipment cost: $530,000
S
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A ’s energy self sufficiency
A asset capacity
A to export energy (future)
year (Cap and Trade value? )
A and MS S Board support
anitary S ervice partnership
upport from Board of S upervisors, central Marin town and city councils, and regulators
A & MS S staff contributions during facility design, testing, and start-up, daily facility operation and maintenance, and on-going program administration.
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A and MS S Board support
anitary S ervice partnership
upport from Board of S upervisors, central Marin town and city councils, and regulators
A & MS S staff contributions during facility design, testing, and start-up, daily facility operation and maintenance, and on-going program administration.
PO T ENT IAL EXC ESS ENERG Y AND MET HANE
Pipeline injection for other local uses. Send electricity back to the grid. Fuel vehicles
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Jason Dow – CMSA jdow@cmsa.us 415-459-1455, ext 145 Kim Scheibly – MSS kim.scheibly@marinsanitary.com
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10 ¢ per gallon revisited.
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anitation Department picks up 25-30 tons of Municipal S
A data, 18%
W may be food waste (4.5 - 5.4 tons each day from WL residences).
from Purdue University Dining Courts.
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Engineering $18,155 Construction $17,000 Grinder $50,000 Platform and Cart Tipper $13,011 Total $98,166
plant’s electricity needs.
reduction in natural gas usage. 24,900 therms/ year in heat recovered from microturbines.
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chools
tadiums
tores
FOOD WAS TE MUNICIP AL S OLID WAS TE
receiving tank
to FOG inlet. Better screening ahead of pumps.
eparate receiving tank for Food Waste in the future.
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Energy
Need for a 3rd microturbine is being evaluated
waste, and other high strength waste are plentiful. May use extra biogas in CNG vehicles.
eparate waste receiving stations for liquids and solids
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