Secretomics: a biochemical footprinting tool for developing microalgal cultivation strategies

2021 ◽  
Vol 37 (11) ◽  
Author(s):  
Rakhi Bajpai Dixit ◽  
Balu Raut ◽  
Suvarna Manjre ◽  
Mitesh Gawde ◽  
Chandra Gocher ◽  
...  
Keyword(s):  
Microalgal Cultivation

scholarly journals Optimisation of microalgal cultivation via nutrient-enhanced strategies: the biorefinery paradigm

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Gonzalo M. Figueroa-Torres ◽  
Jon K. Pittman ◽  
Constantinos Theodoropoulos
Keyword(s):  
Kinetic Model ◽  
Growth Dynamics ◽  
Value Added ◽  
Cost Effective ◽  
Predictive Modelling ◽  
Nitrogen And Phosphorus ◽  
Predictive Capacity ◽  
Microalgal Biomass ◽  
Microalgal Cultivation ◽  
Lipid Formation

Abstract Background The production of microalgal biofuels, despite their sustainable and renowned potential, is not yet cost-effective compared to current conventional fuel technologies. However, the biorefinery concept increases the prospects of microalgal biomass as an economically viable feedstock suitable for the co-production of multiple biofuels along with value-added chemicals. To integrate biofuels production within the framework of a microalgae biorefinery, it is not only necessary to exploit multi-product platforms, but also to identify optimal microalgal cultivation strategies maximising the microalgal metabolites from which biofuels are obtained: starch and lipids. Whilst nutrient limitation is widely known for increasing starch and lipid formation, this cultivation strategy can greatly reduce microalgal growth. This work presents an optimisation framework combining predictive modelling and experimental methodologies to effectively simulate and predict microalgal growth dynamics and identify optimal cultivation strategies. Results Microalgal cultivation strategies for maximised starch and lipid formation were successfully established by developing a multi-parametric kinetic model suitable for the prediction of mixotrophic microalgal growth dynamics co-limited by nitrogen and phosphorus. The model’s high predictive capacity was experimentally validated against various datasets obtained from laboratory-scale cultures of Chlamydomonas reinhardtii CCAP 11/32C subject to different initial nutrient regimes. The identified model-based optimal cultivation strategies were further validated experimentally and yielded significant increases in starch (+ 270%) and lipid (+ 74%) production against a non-optimised strategy. Conclusions The optimised microalgal cultivation scenarios for maximised starch and lipids, as identified by the kinetic model presented here, highlight the benefits of exploiting modelling frameworks as optimisation tools that facilitate the development and commercialisation of microalgae-to-fuel technologies.

scholarly journals An Integrated Methodology towards Mitigation of Global Warming and Biomass Production for Biodiesel using Chlorella sorokiniana BTA 9031

2019 ◽  
Vol 8 (4) ◽  
pp. 3054-3058
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
Methyl Esters ◽  
Research Work ◽  
Co2 Concentration ◽  
Chlorella Sorokiniana ◽  
Biodiesel Production ◽  
Co2 Absorption ◽  
Microalgal Biomass ◽  
Microalgal Cultivation

The rise of atmospheric carbon dioxide (CO2 )concentration as well as depletion of fossil fuel reserves calls for the development of clean and ecofriendly alternative fuel source. Recently, lipid rich microalgal biomass is being extensively studied for generation of biodiesel however, the expensesincurred on production of microalgal biomassis a significant hurdle. Almost 80 % of the production costis generated from the cultivation medium which majorly comprise of carbon, nitrogen and phosphate. If the microalgal cultivation could be linked to a CO2 capturing unit than the cost of production could be reduced to a large extent. CO2 absorption by means of aqueous amine solvents is known to be a mature technology and could be integrated with microalgal cultivation unit for efficient utilization of the captured CO2 . In this present research work, blended solution of piperazine (PZ) and2-amino2-methyl-1-propanol (AMP) (5/25 wt. %) was used to capture CO2 and then the captured CO2 was utilized as an inorganic carbon stream for growing Chlorella sorokiniana BTA 9031 for biodiesel production. The CO2rate absorption was governed by series of process variablesviz.solvent flow rate ranges (1.5 to 3) ×10⁻4 m 3 min-1 , absorption temperature (298 to 313) K,concentration of CO2 (10 to 15) kPa and gas flow rate(5 to 8) ×10⁻3 m 3 min-1 . The detected final biomass strengthofChlorella sorokiniana BTA 9031 was0.955g L-1 . The fatty acid methyl esters (FAME) determinedsubsequentlyacid transesterification was observed to contain fatty acids suitable for biodiesel production.

scholarly journals Magnetic Field Application to Increase Yield of Microalgal Biomass in Biofuel Production

2020 ◽  
Author(s):  
Lucielen Oliveira Santos ◽  
Pedro Garcia Pereira Silva ◽  
Sharlene Silva Costa ◽  
Taiele Blumberg Machado
Keyword(s):  
Magnetic Field ◽  
Renewable Energy Sources ◽  
Biomass Concentration ◽  
Field Application ◽  
Raw Material ◽  
Biofuel Production ◽  
Microalgal Biomass ◽  
Microalgal Cultivation ◽  
High Yields ◽  
Magnetic Field Application

Use of fuels from non-renewable sources has currently been considered unsustainable due to the exhaustion of supplies and environmental impacts caused by them. Climate change has concerned and triggered environmental policies that favor research on clean and renewable energy sources. Thus, production of third generation biofuels is a promising path in the biofuel industry. To yield this type of biofuels, microalgae should be highlighted because this raw material contains important biomolecules, such as carbohydrates and lipids. Technological approaches have been developed to improve microalgal cultivation under ecological conditions, such as light intensity, temperature, pH and concentrations of micro and macronutrients. Thus, magnetic field application to microalgal cultivation has become a viable alternative to obtain high yields of biomass concentration and accumulation of carbohydrates and lipids.

Advances in the synthesis and applications of nanomaterials to increase CO2 biofixation in microalgal cultivation

2021 ◽  
Author(s):  
Michele Greque de Morais ◽  
Bruna Pereira Vargas ◽  
Bruna da Silva Vaz ◽  
Bruna Barcelos Cardias ◽  
Jorge Alberto Vieira Costa
Keyword(s):  
Microalgal Cultivation ◽  
Co2 Biofixation

Role of nanoparticles on microalgal cultivation: A review

Fuel ◽  
2020 ◽  
Vol 280 ◽  
pp. 118598 ◽  
Author(s):  
Laura Vargas-Estrada ◽  
S. Torres-Arellano ◽  
Adriana Longoria ◽  
Dulce M. Arias ◽  
Patrick U. Okoye ◽  
...  
Keyword(s):  
Microalgal Cultivation

Using ozonation to eliminate the inhibition of soluble algal products (SAP) of Scenedesmus sp. LX1 on its growth in microalgal cultivation for biomass/bioenergy production

2015 ◽  
Vol 15 (5) ◽  
pp. 1034-1039 ◽  
Author(s):  
Lin-Lan Zhuang ◽  
Yin-Hu Wu ◽  
Xiao-Jie Shi ◽  
Tian-Yuan Zhang ◽  
Hong-Ying Hu
Keyword(s):  
Growth Rate ◽  
Recycled Water ◽  
Acid Base ◽  
Oxidation Treatment ◽  
Base Property ◽  
Microalgal Cultivation ◽  
Bioenergy Production ◽  
Algal Products ◽  
Microalgae Growth ◽  
Acid Base Property

Water recycling is an effective way to reduce water consumption in the industrialization of microalgae-based biomass/bioenergy production. The soluble algal products (SAP) which inhibit the microalgae growth will accumulate in the recycled water. Therefore, the ozone oxidation treatment of SAP produced by Scenedesmus sp. LX1 was studied to reduce the inhibition of SAP. The experimental results showed that there was almost no change in the content of SAP (counted by dissolved organic carbon) after ozonation, but the inhibition of SAP on microalgae growth disappeared. The intrinsic growth rate (r) of Scenedesmus sp. LX1 in the cultivation solution containing untreated SAP was 0.52 d−1, and it rose to 0.95 d−1 after SAP was ozonized. The maximum population growth rate (Rmax) followed a similar trend, increasing from 9.19 × 105 to 13.0 × 105 cells mL−1 d−1. It was suggested that the changes of fluorescence and hydrophilic–hydrophobic/acid–base property of SAP after ozonation leads to the disappearance of SAP inhibition on microalgae growth.

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