skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: A validated thermal and biological model for predicting algal productivity in large scale outdoor cultivation systems

Journal Article · · Algal Research
 [1];  [1];  [1];  [2];  [1]
  1. Colorado State Univ., Fort Collins, CO (United States)
  2. Arizona State Univ., Mesa, AZ (United States)

Proper assessment of the sustainability of algal products requires an understanding of algal growth rate with regional and temporal resolution. This study developed a bulk growth model that utilizes geospatial data, reactor geometry inputs, and a maximum of six strain-specific parameters to predict algal productivity with temporal and regional resolution. The model requires local weather data to calculate the time-resolved culture temperature which is combined with a biological model based on maximum theoretical carbon fixation to predict the time-resolved algal concentration. Validation of the model against experimental data illustrates an average ac- curacy of 0.27% ± 5.32% when comparing algal concentration at harvest over 45 days of cultivation data for Galdieria sulphuraria 5587.1, and Galdieria sulphuraria Soos grown in photobioreactors (PBRs) in Mesa, AZ (33.4152° N, 111.8315° W). For open raceway ponds (ORPs), an accuracy of 0.9% ± 2.35% was achieved when comparing algal concentration at harvest over 50 days of cultivation data for Chlorella vulgaris, Desmodesmus intermedius, Nannochloropsis oceanica grown in Atlanta, GA (33.7490° N, 84.3880° W) and Mesa, AZ (33.4152° N, 111.8315° W). The validation trials spanned three seasons (winter, spring, and summer) to ensure model ac- curacy throughout the year, and concentration between harvests was modeled with hourly resolution. The validated model is used to assess the productivity at several case-study locations in the United States with Chlorella vulgaris, grown in open raceway ponds and Galdieria sulphuraria grown in vertical flat panel photo- bioreactors. In conclusion, the model has been published as an open-source tool, in an effort to increase the fidelity of future studies that rely on outdoor algae cultivation for feedstock production and allow for time resolved results for future techno-economic and life cycle assessments.

Research Organization:
Arizona State Univ., Mesa, AZ (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
EE0007562
OSTI ID:
1806213
Alternate ID(s):
OSTI ID: 1780183
Journal Information:
Algal Research, Vol. 54; ISSN 2211-9264
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (49)

Bioflocculation as an innovative harvesting strategy for microalgae journal October 2016
Algal biofuel production for fuels and feed in a 100-ha facility: A comprehensive techno-economic analysis and life cycle assessment journal July 2015
Techno-economic assessment of open microalgae production systems journal April 2017
Sustainability of carbon delivery to an algal biorefinery: A techno-economic and life-cycle assessment journal March 2019
Techno-economic and life-cycle assessment of an attached growth algal biorefinery journal November 2016
The potentials and challenges of algae based biofuels: A review of the techno-economic, life cycle, and resource assessment modeling journal May 2015
Thermal Reactor Model for Large-Scale Algae Cultivation in Vertical Flat Panel Photobioreactors journal March 2016
Design scenarios for flat panel photobioreactors journal October 2011
A numerical thermal growth model for prediction of microalgae production in photobioreactors journal March 2016
A simplified monodimensional approach for modeling coupling between radiant light transfer and growth kinetics in photobioreactors journal May 1995
Kinetic modeling of the photosynthetic growth of Chlamydomonas reinhardtii in a photobioreactor journal May 2012
Simulating Growth Kinetics in a Data-Parallel 3D Lattice Photobioreactor journal January 2013
Full-Scale Validation of a Model of Algal Productivity journal November 2014
Modeling and Optimization of Algae Growth journal August 2015
Microalgae bulk growth model with application to industrial scale systems journal April 2011
A validated model to predict microalgae growth in outdoor pond cultures subjected to fluctuating light intensities and water temperatures journal January 2016
Theoretical Maximum Algal Oil Production journal October 2009
Considerations for the maximum production rates of triacylglycerol from microalgae journal January 2010
Harmonization of experimental approach and data collection to streamline analysis of biomass composition from algae in an inter-laboratory setting journal July 2017
The Algae Testbed Public-Private Partnership (ATP3) framework; establishment of a national network of testbed sites to support sustainable algae production journal July 2017
Characterization of a non-thermophilic strain of the red algal genus Galdieria isolated from Soos (Czech Republic) journal September 2002
Maximizing recovery of energy and nutrients from urban wastewaters journal June 2016
Biogeographic and Phylogenetic Diversity of Thermoacidophilic Cyanidiales in Yellowstone National Park, Japan, and New Zealand journal March 2008
The dark side of algae cultivation: Characterizing night biomass loss in three photosynthetic algae, Chlorella sorokiniana, Nannochloropsis salina and Picochlorum sp. journal November 2015
Dynamic Modeling of the Microalgae Cultivation Phase for Energy Production in Open Raceway Ponds and Flat Panel Photobioreactors journal September 2015
An Unexpected Correlation between Cardinal Temperatures of Microbial Growth Highlighted by a New Model journal June 1993
A screening model to predict microalgae biomass growth in photobioreactors and raceway ponds journal January 2013
Effect of ammonium and high light intensity on the accumulation of lipids in Nannochloropsis oceanica (CCAP 849/10) and Phaeodactylum tricornutum (CCAP 1055/1) journal March 2018
Modeling and Evaluation of CO 2 Supply and Utilization in Algal Ponds journal October 2011
A peaked function for modeling temperature dependence of plant productivity journal January 2007
A Dynamic Optimization Model for Designing Open-Channel Raceway Ponds for Batch Production of Algal Biomass journal March 2016
Universal Temperature Model for Shallow Algal Ponds Provides Improved Accuracy journal April 2011
Productivity correlated to photobiochemical performance of Chlorella mass cultures grown outdoors in thin-layer cascades journal July 2010
Effect of temperature and light on the growth of algae species: A review journal October 2015
Algal growth response and survival in a range of light and temperature conditions: implications for non-steady-state conditions in waste stabilisation ponds journal June 2007
The role of growth rate, redox-state of the plastoquinone pool and the trans-thylakoid ΔpH in photoacclimation of Chlorella vulgaris to growth irradiance and temperature journal December 2000
Combined influence of light and temperature on growth rates of Nannochloropsis oceanica: linking cellular responses to large-scale biomass production journal December 2005
Growth model for raceway pond cultivation of Desmodesmus sp . MCC34 isolated from a local water body journal October 2015
Regulation of photosynthesis in the unicellular acidophilic red alga Galdieria sulphuraria†: Regulation of photosynthesis in Galdieria journal June 2007
Optimization of outdoor cultivation in flat panel airlift reactors for lipid production by Chlorella vulgaris: Outdoor Cultivation of C. vulgaris for Lipid Production journal May 2013
Mechanistic Modeling of Broth Temperature in Outdoor Photobioreactors journal March 2010
Modeling of biomass productivity in tubular photobioreactors for microalgal cultures: Effects of dilution rate, tube diameter, and solar irradiance journal June 1998
Algal productivity modeling: A step toward accurate assessments of full-scale algal cultivation: Toward Accurate Algal Productivity Predictions journal March 2015
Scale-Up of flat plate photobioreactors considering diffuse and direct light characteristics journal September 2011
Global evaluation of biofuel potential from microalgae journal May 2014
A Simple and reliable formula for assessment of maximum volumetric productivities in photobioreactors journal March 2009
National microalgae biofuel production potential and resource demand: NATIONAL ALGAE BIOFUEL PRODUCTION journal March 2011
A macromodel for outdoor algal mass production journal April 1990
Unified field studies of the algae testbed public-private partnership as the benchmark for algae agronomics journal November 2018