Advances in the Development of Biofertilizers and Biostimulants from Microalgae

Miranda, Alejandra M.; Hernandez-Tenorio, Fabian; Villalta, Fabian; Vargas, Gabriel J.; Sáez, Alex A.

doi:10.3390/biology13030199

Cited by 7 publications

(3 citation statements)

References 88 publications

(125 reference statements)

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“…Consequently, the integration of algae biomass production with agro-wastewater treatment presents a financially advantageous strategy for the microalgae-based biostimulant sector. Specifically, this integration can reduce the overall costs associated with microalgae cultivation by utilizing agro-wastewater as a nutrient source, thereby minimizing the need for fresh water and additional synthetic nutrients [24]. This approach can lower the production costs of microalgae-based biostimulants, making the process more sustainable and economically viable.…”

Section: Discussionmentioning

confidence: 99%

Development of a Greenhouse Wastewater Stream Utilization System for On-Site Microalgae-Based Biostimulant Production

Faliagka,

Kountrias,

Dimitriou

et al. 2024

AgriEngineering

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The challenges to feed the world in 2050 are becoming more and more apparent. This calls for producing more with fewer inputs (most of them under scarcity), higher resource efficiency, minimum or zero effect on the environment, and higher sustainability. Therefore, increasing the circularity of production systems is highly significant for their sustainability. This study investigates the utilization of waste streams from greenhouse hydroponic drainage nutrient solutions for the cultivation of the microalgae Desmodesmus sp. The cultivation was done in an automatically controlled container-scale closed tubular Photo Bio-Reactor (PBR). The study included lab-scale open-pond system experiments and in situ container-scale experiments in the greenhouse wastewater system to assess biomass growth, optical density, nitrogen consumption, and the influence of enzymatic complexes on microalgae cell breakdown. A batch-harvesting process was followed, and the harvested microalgae biomass was pre-concentrated using FeCl3 as a flocculant that has demonstrated efficient sedimentation and biomass recovery. Following microalgae sedimentation, the produced biomass was used for biostimulant production by means of a biocatalysis process. The enzymatic complexes, “EnzProt”, “EnzCell”, and “EnzMix” were tested for cell breakdown, with “EnzMix” at a dosage of 10% showing the most promising results. The results demonstrate successful biomass production and nitrogen uptake in the lab-scale open-pond system, with promising upscaling results within container-scale cultivation. The findings contribute to a better assessment of the needs of Desmodesmus sp. culture and highlight the importance in optimizing culture conditions and enzymatic processes for the production of biostimulants.

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Section: Discussionmentioning

confidence: 99%

Development of a Greenhouse Wastewater Stream Utilization System for On-Site Microalgae-Based Biostimulant Production

Faliagka,

Kountrias,

Dimitriou

et al. 2024

AgriEngineering

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“…Microalgae are used as a biofertilizers and biostimulants by promoting crop growth and increasing soil nutrient contents, thereby reducing the usage of chemical fertilizers [116]. In contrast, Chlamydomonas species have received little attention and are not fully utilized in agriculture, despite being among the most abundant microalgae species in natural soil ecosystems.…”

Section: Biofertilizersmentioning

confidence: 99%

The Microalgae <em>Chlamydomonas </em>for Bioremediation and Bioproduct Production

Bellido-Pedraza,

Torres,

Llamas

2024

Preprint

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The extensive metabolic diversity of microalgae, coupled with their rapid growth rates and cost-effective production, position these organisms as highly promising resources for a wide range of biotechnological applications. These characteristics allow microalgae to address crucial needs in both the agricultural, medical, and industrial sectors. Microalgae are proving to be val-uable in various fields, including the remediation of diverse wastewater types, the production of biofuels and biofertilizers, and the extraction of various products from their biomass. For decades, the microalga Chlamydomonas has been widely used as a fundamental research model organism in various areas such as photosynthesis, respiration, sulfur and phosphorus metabolism, nitrogen metabolism, and flagella synthesis, among others. However, in recent years, the potential of Chlamydomonas as a biotechnological tool for bioremediation, biofertilization, biomass, and bio-products production has been increasingly recognized. Bioremediation of wastewater using Chlamydomonas presents significant potential for sustainable reduction of contaminants and fa-cilitates resource recovery and valorization of microalgal biomass, offering important economic benefits. Chlamydomonas has also established itself as a platform for the production of a wide va-riety of biotechnologically interesting products, such as different types of biofuels, and high-value-added products. The aim of this review is to achieve a comprehensive understanding of the potential of Chlamydomonas in these aspects, and to explore their interrelationship, which would offer significant environmental and biotechnological advantages.

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“…Microalgae serve as biofertilizers and biostimulants, enhancing crop growth and enriching soil nutrients, which in turn reduces the need for chemical fertilizers and supports sustainable agriculture [136]. However, despite their abundance in natural soil ecosystems, Chlamydomonas species have been largely overlooked and underutilized in agricultural practices.…”

Section: Biofertilizersmentioning

confidence: 99%

Significance and Applications of the Microalgae Chlamydomonas and its Bacterial Consortia

Torres,

Bellido-Pedraza,

Llamas

2024

Preprint

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The wide metabolic diversity of microalgae, their fast growth rates, and cost-effective production make these organisms highly promising resources for a variety of biotechnological applications, addressing critical needs in industry, agriculture, and medicine. The utilization of microalgae in consortia with bacteria is proving to be valuable in different biotechnological fields, including treating various types of wastewaters, producing biofertilizers, and extracting various products from their biomass. Monoculture of the microalgae Chlamydomonas has been a prominent research model for many years, extensively utilized in studying photosynthesis, sulfur and phosphorus metabolism, nitrogen metabolism, respiration, and flagella synthesis, among others. Recent re-search has increasingly recognized the potential of Chlamydomonas-bacteria consortia as a bio-technological tool for various applications. Bioremediation of wastewater using Chlamydomonas, and its bacterial consortia presents significant potential for the sustainable reduction of contam-inants, while also facilitating resource recovery and valorization of microalgal biomass. Using Chlamydomonas and its bacterial consortia as biofertilizers can offers several benefits, such as en-hancing crop yield, protecting crops, maintaining soil fertility and stability, aiding in CO2 miti-gation, and contributing to sustainable agriculture practices. Chlamydomonas-bacterial consortia play a significant role in the production of high-value products, particularly in biofuel and en-hancing H2 production. This review aims to achieve a comprehensive understanding of the po-tential of Chlamydomonas monoculture and its bacterial consortia, identifying current applications, and proposing new research and development directions to maximize its potential.

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Advances in the Development of Biofertilizers and Biostimulants from Microalgae

Cited by 7 publications

References 88 publications

Development of a Greenhouse Wastewater Stream Utilization System for On-Site Microalgae-Based Biostimulant Production

Development of a Greenhouse Wastewater Stream Utilization System for On-Site Microalgae-Based Biostimulant Production

The Microalgae <em>Chlamydomonas </em>for Bioremediation and Bioproduct Production

Significance and Applications of the Microalgae Chlamydomonas and its Bacterial Consortia

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