CONTAMINATION CONTROL FOR A MULTI- PLATFORM ALGAE COMMERCIALIZATION...
Transcript of CONTAMINATION CONTROL FOR A MULTI- PLATFORM ALGAE COMMERCIALIZATION...
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CONTAMINATION CONTROL FOR A MULTI-PLATFORM ALGAE COMMERCIALIZATION STRATEGY Laura T. Carney, PhD Heliae Development, LLC
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Heliae Industry Focus
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MATERIALS
• Carotenoids • Oils, protein
AQUACULTURE
• Products • Ingredients
AGRICULTURE
• Specialty Crops • Feeds
ENVIRONMENT
• Remediation • Sequestration
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• >125 associates • Hitting targets in 3 production
platforms - 2 commercialized
Gilbert, AZ - Facility Build-out
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600,000 L
Heliae © 2015 – Heliae Development, LLC World’s Largest Indoor Photo-
Bioreactor
Mixotrophy
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Contamination control
• Multiple platforms require versatile treatment development tools
• Case #1: Chytrids in phototrophic platform
• Case #2: Bacteria in mixotrophic platform
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CRASHED HEALTHY
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Heliae treatment development
Pipeline steps for photo platform:
STEP 1: Treatment screening (well-plates 1-3 mL)
STEP 2: Treatment optimization (well-plates 1-3 mL):
• Determine lowest dose and MIC
• Treatment concentration detection
STEP 3: Treatment optimization (flasks 100 mL)
• Performance within environmental ranges
• Timing and frequency of applications
STEP 4: Scaled to small greenhouse reactors (200 L)
• replicated outdoor conditions
STEP 5: Scale to outdoor production reactors (10,000 L)
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Case #1: Chytrids • Two types discovered in cultures 2014
– Microscopy – Isolation – Sequence ID
• Significant losses caused by rapid progression to high infection rates
• Treatment development pipeline applied • Dozens of chemicals tested
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40x 100x Credit: J. Longcore
100x Credit: J. Wilkenfeld
100x Credit: J. Wilkenfeld
JEL812: Rhizophydiales
JEL821: Paraphysoderma
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Case #1: Chytrid Control
• One clear winner: Hydrogen peroxide (H2O2) • Adapted from bacterial treatment • Requires multiple applications • Optimization of treatment schedule and
concentration – 3mL – 10,000L
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High
Med
Low
200 L reactors
Heliae © 2015 – Heliae Development, LLC Patent#
US9113607B1
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Case #1: Chytrid Control Using H2O2
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Used routinely in 100,000 L Reactors
Patent# US9113607B1
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Contamination Control Expertise
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Six months of H2O2 application at 100,000L scale
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CASE #2: BACTERIA IN MIXOTROPHIC PLATFORM
Eneko Ganuza, Ph.D., Charles Sellers, Braden Bennett and Laura Carney, Ph.D. Heliae Development, LLC
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Case #2: Parasitic bacteria Mixotrophic platform
• Bacteria induced crashes
• Bacteria attaching to cell wall
– Observed 2 d before crash
• Cell debris and lysis
– 1 d before crash
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100x Credit: S. Qin
Bio
mas
s
attachment lysis
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Case #2: Parasitic bacteria Mixotrophic platform
• Community 16s sequencing (Sanger) useful for tracking when culprit not confirmed
– Changes in dominant community structure
– Relative proportion
– qPCR assay
• Attachment, lysis and crash correlated with:
– Appearance of sequence matches for Vampirovibrio
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Time
Whole Culture Phycosphere
100x Credit: J. Wilkenfeld
100x Credit: S. Qin
Bio
mas
s
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Routine monitoring of vampire
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Alg
ae B
iom
ass
• Frequent summer crashes
• Treatment pipeline applied
• One promising candidate
Run 1 Run 2 Run 3
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Impact of treatment on the vampire
• Treatment developed and scaled up for mixotrophic platform • Culture from infected 20,000 L reactor transferred to replicate 1000 L and one was treated • Attachment reduced by over 70% with treatment
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100x Credit: S. Qin
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Contamination Control Expertise
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Untreated Treated
100,000 L reactor
• Increase in harvested biomass
• Culture longevity more than doubled – less labor
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Conclusions
• Successful contamination strategies in place for multiple platforms
• Contamination challenges vary by season, with scale and with algae strain/platform
• Continue to create contamination solutions that:
– Maximize the sweet spot for algae health
– Do not accumulate in the final commercial product
– Are economical and can be rapidly fine tuned throughout scale-up process
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Acknowledgements • Dr. Eneko Ganuza • Kristine Sorensen • Charles Sellers • Braden Bennett • Craig Erny • Cory Steward • Kevin Boyd
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Delivering Today, Building for Tomorrow
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Laura Carney, Ph.D. Molecular Ecology Team
Lead Heliae Development, LLC
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