Integrating Wastewater Treatment and Algal Carbon …Paul Kadota October 12, 2012 Co-Authors...
Transcript of Integrating Wastewater Treatment and Algal Carbon …Paul Kadota October 12, 2012 Co-Authors...
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Integrating Wastewater Treatment and Algal Carbon
Capture
Presented atBIO Pacific Rim Summit, Vancouver
ByPaul Kadota
October 12, 2012
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Co-Authors
National Research Council of Canada (Halifax, NS)Aquatic and Crop Resource Development
Patrick McGinn, PhD
Kyoung Park, PhD
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Outline
1. Metro Vancouver – the regional government
2. Integrated Resource Recovery opportunities
3. Laboratory cultivation
4. Cultivation results
5. Next Steps
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• 24 local governments
• Primary roles: water, sewerage,
solid waste, air quality, parks,
regional planning
• Population: 2.3 million
Metro Vancouver
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Sewerage System
Lions Gate
Iona
Lulu
Annacis
NWL
Metro Vancouver
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Integrated Resource Recovery (IRR)
IRR Opportunities
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New Iona Island WWTP
IRR Opportunities
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National Research
Council
Emissions +
WWTP Effluent
Bioproducts
IRR Opportunities
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Dissolved nutrient analysis of Annacis Island WWTP effluent
WastewaterType
NH3-N PO43--P TKN
Nitrate +
NitriteTOC
(mg/L) (mg/L) (mg/L) (mg/L) (mg/L)
Final Effluent 1 (FE1)
13.8 0.75 5.52 0.38 13.5
Final Effluent 2 (FE2)
15.3 0.91 12.0 0.72 14.6
Centrate 1280 231 1040 11.04 194
Laboratory Cultivation
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Growing media treatments
Media Designation
NH3-N PO4-P TOC
(mg/L) (mg/L) (mg/L)
FE1 13.8 0.75 13.5
FE1-Centrate(1%) 26.4 3.06 15.9
FE2 15.3 0.91 14.6
FE2-Centrate(1%) 28.1 3.2 16.5
DIH2O-Centrate(1%)
12.8 2.31 1.94
Laboratory Cultivation
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Shake-Flask Growth Trials
Two microalgae species grown in Annacis Island
effluent:
Scenedesmus sp. AMDD
Chlorella sorokiniana
Growth Conditions
75 mol photons m-2 s-1
22 C
2% CO2 in air
Laboratory Cultivation
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Microalgae Growth Curves
Scenedesmus sp. AMDD
Chlorella sorokiniana
Cultivation Results
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Effect of Further Centrate Additions
Microalgae Species
Wastewater Type
Final Biomass
Cell Number
Growth Rate
Nutrient Removal
(g L-1
) (cells mL-1
) (div. d-1
) (NH3-N, %) PO4-P, %)
Scenedesmus sp. AMDD
FE2-Centrate(2%)
0.98 33877333 1.88 99.8 100
FE2-Centrate(5%)
1.12 34003692 1.88 99.9 100
FE2-Centrate(10%)
0.68 24509538 2.60 75.6 57.5
•100% nutrient removal observed at 2% and 5% centrate addition
•10% centrate addition lowered final biomass quantity
Cultivation Results
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Summary
Annacis Island wastewater effluent is a useful resource for
the intensive cultivation of freshwater microalgae
Yields of Scenedesmus sp. AMDD biomass were
significantly enhanced to >1.1 g/L in effluents blended with
5% centrate wastewater
Nitrogen and phosphorus were completely recovered by
algal growth in effluent blended with 5% centrate; nutrient
recovery was reduced in effluent cultures blended with 10%
centrate
Cultivation Results
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Pilot Test
Requirements to move from lab to industrial setting
• Consortium
– Qualified people with knowledge
– Better / cost efficient technologies
– Financial backing
– Industrial site
– Governments, private sector, industries, academics
Next Steps
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Industrial Site
Next Steps
Sustainability Academy:
Annacis Wastewater Centre
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The Challenge
By 2014, answer this:
“Should algal cultivation processes be specified in the design of the new Iona Island WWTP?”