Greenhouse Gas Balance and Algae-Based Biodiesel

Flesch, A.; Beer, Tom; Campbell, Peter K.; Batten, David F.; Grant, Tim

doi:10.1007/978-94-007-5479-9_14

Cited by 4 publications

(3 citation statements)

References 57 publications

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“…They can be used for treating wastewater and producing microalgae biomass [ 18 , 19 , 20 , 21 , 25 ];…”

Section: Figurementioning

confidence: 99%

“…On the other hand, microalgae have been used for treating wastewater since many decades ago, when the pioneer group led by Prof. William Oswald initiated their use on a large scale in California [ 17 ]. Following this approach, research has been oriented toward the design and establishment of integrated systems in which microalgae were used for treating wastewater and producing valuable biomass [ 18 , 19 , 20 , 21 ]. Currently, microalgae-based biorefineries have been investigated by several research groups [ 22 , 23 , 24 ], and in some cases, such a type of biorefinery has integrated the treatment of wastewater and used some of the treated effluents or digestates as a source of nutrients [ 25 , 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

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Microalgae-Based Biorefineries: Challenges and Future Trends to Produce Carbohydrate Enriched Biomass, High-Added Value Products and Bioactive Compounds

Olguín

Sánchez-Galván

Arias‐Olguín³

et al. 2022

Biology

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Microalgae have demonstrated a large potential in biotechnology as a source of various macromolecules (proteins, carbohydrates, and lipids) and high-added value products (pigments, poly-unsaturated fatty acids, peptides, exo-polysaccharides, etc.). The production of biomass at a large scale becomes more economically feasible when it is part of a biorefinery designed within the circular economy concept. Thus, the aim of this critical review is to highlight and discuss challenges and future trends related to the multi-product microalgae-based biorefineries, including both phototrophic and mixotrophic cultures treating wastewater and the recovery of biomass as a source of valuable macromolecules and high-added and low-value products (biofertilizers and biostimulants). The therapeutic properties of some microalgae-bioactive compounds are also discussed. Novel trends such as the screening of species for antimicrobial compounds, the production of bioplastics using wastewater, the circular economy strategy, and the need for more Life Cycle Assessment studies (LCA) are suggested as some of the future research lines.

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“…They can be used for treating wastewater and producing microalgae biomass [ 18 , 19 , 20 , 21 , 25 ];…”

Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microalgae-Based Biorefineries: Challenges and Future Trends to Produce Carbohydrate Enriched Biomass, High-Added Value Products and Bioactive Compounds

Olguín

Sánchez-Galván

Arias‐Olguín³

et al. 2022

Biology

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“…Comparison of energy balance and CO 2 emission between conventional biodiesel production and biocrude oil production, which was prepared from the literature shown in Table6and[142,[144][145][146]. CO 2 emission was estimated based on the unit calorific value of heavy oil in accordance with the guideline of the Ministry of Environment, Japan[147].…”

mentioning

confidence: 99%

Biocrude Oil Production by Integrating Microalgae Polyculture and Wastewater Treatment: Novel Proposal on the Use of Deep Water-Depth Polyculture of Mixotrophic Microalgae

Watanabe

Isdepsky

2021

Energies

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Microalgae have attracted significant attention worldwide as one of the most promising feedstock fossil fuel alternatives. However, there are a few challenges for algal fuels to compete with fossil fuels that need to be addressed. Therefore, this study reviews the R&D status of microalgae-based polyculture and biocrude oil production, along with wastewater treatment. Mixotrophic algae are free to some extent from light restrictions using organic matter and have the ability to grow well even in deep water-depth cultivation. It is proposed that integrating the mixotrophic microalgae polyculture and wastewater treatment process is the most promising and harmonizing means to simultaneously increase capacities of microalgae biomass production and wastewater treatment with a low land footprint and high robustness to perturbations. A large amount of mixotrophic algae biomass is harvested, concentrated, and dewatered by combining highly efficient sedimentation through flocculation and energy efficient filtration, which reduce the carbon footprint for algae fuel production and coincide with the subsequent hydrothermal liquefaction (HTL) conversion. HTL products are obtained with a relatively low carbon footprint and separated into biocrude oil, solid, aqueous, and gas fractions. Algae biomass feedstock-based HTL conversion has a high biocrude oil yield and quality available for existing oil refineries; it also has a bioavailability of the recycled nitrogen and phosphorus from the aqueous phase of algae community HTL. The HTL biocrude oil represents higher sustainability than conventional liquid fuels and other biofuels for the combination of greenhouse gas (GHG) and energy return on investment (EROI). Deep water-depth polyculture of mixotrophic microalgae using sewage has a high potential to produce sustainable biocrude oil within the land area of existing sewage treatment plants in Japan to fulfill imported crude oil.

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Non-destructive hydrocarbon extraction from Botryococcus braunii BOT-22 (race B)

et al. 2013

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Greenhouse Gas Balance and Algae-Based Biodiesel

Cited by 4 publications

References 57 publications

Microalgae-Based Biorefineries: Challenges and Future Trends to Produce Carbohydrate Enriched Biomass, High-Added Value Products and Bioactive Compounds

Microalgae-Based Biorefineries: Challenges and Future Trends to Produce Carbohydrate Enriched Biomass, High-Added Value Products and Bioactive Compounds

Biocrude Oil Production by Integrating Microalgae Polyculture and Wastewater Treatment: Novel Proposal on the Use of Deep Water-Depth Polyculture of Mixotrophic Microalgae

Non-destructive hydrocarbon extraction from Botryococcus braunii BOT-22 (race B)

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