Enhancement of microalgal growth and biocomponent-based transformations for improved biofuel recovery: A review

Salama, El-Sayed; Hwang, Jae-Hoon; El-Dalatony, Marwa M.; Kurade, Mayur B.; Kabra, Akhil N.; Abou-Shanab, Reda A.I.; Kim, Ki‐Hyun; Yang, Il Seung; Govindwar, Sanjay P.; Kim, Sunjoon

doi:10.1016/j.biortech.2018.02.006

Cited by 60 publications

(21 citation statements)

References 125 publications

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“…[38]. The counting and isolation of yeasts were performed using YEPG (10 g yeast extract, 10 g bacteriological peptone, 20 g glucose, 20 g agar with pH 3.5) and incubated at 28 °C for 48 h [39]. The lamentous fungi population was counting using PDA (200 g raw potatoes, g dextrose, 20 g agar, 1 L distilled water) and incubated at 25 °C for 7 days [40].…”

Section: Methodsmentioning

confidence: 99%

Physicochemical and microbiological dynamics in composting of organic waste using a new bioreactor model

Gaspar

Assis

Carvalho

et al. 2020

Preprint

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Background It is important to use renewable resources to minimize the environmental risks and the composting is one of the most sustainable methods for the management of organic waste. Methods The objective of this work was to evaluate the physicochemical dynamics of microorganisms and to study cultivable microorganisms during the composting process of organic residues in a new model of bioreactor. The formulation of a possible cocktail of microorganisms selected for use as a compound accelerator will be further investigated. In addition, the use of two inoculants (non-commercial inoculum (NCI)) and commercial inoculum (CI)) and a control without inoculant during the composting process will be analyzed to evaluate its efficiency. Composting was performed by mixing organic waste from the garden waste and University Restaurant, obtaining an ideal C/N ratio of 30:1. The composting process was carried out in 1 m3 composters with controlled temperature and aeration. Results The thermophilic phase for all treatments was reached by the second day. Mature compost was obtained after an average of 120 days and composting in all treatments showed an increase in the availability of P and micronutrients. During composting, the population of bacteria and actinobacteria were higher than those of yeasts and filamentous fungi. Conclusions Increased composting efficiency was observed when starter cultures were used, the treatments presented advantages such as greater mineralization of P-available and micronutrients as Mn and Zn, in terms of the quality of the final product in comparison to the control treatment.

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Section: Methodsmentioning

confidence: 99%

Physicochemical and microbiological dynamics in composting of organic waste using a new bioreactor model

Gaspar

Assis

Carvalho

et al. 2020

Preprint

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“…The photosynthetic efficiency of microalgae is 10–50 times that of terrestrial plants, while the theoretical bio–oil production of some oil-producing microalgae is 10–100 times that of terrestrial plants [ 87 ], so microalgae are considered to be a potential renewable raw material for future new energy and chemicals [ 88 ]. However, the raw material cost of mass production of microalgae is too high, and it is not practical to use microalgae to produce biofuel in the short term.…”

Section: Application Of Plant Hormonesmentioning

confidence: 99%

The Active Phytohormone in Microalgae: The Characteristics, Efficient Detection, and Their Adversity Resistance Applications

Wang

Guo

et al. 2021

Molecules

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Phytohormones are a class of small organic molecules that are widely used in higher plants and microalgae as chemical messengers. Phytohormones play a regulatory role in the physiological metabolism of cells, including promoting cell division, increasing stress tolerance, and improving photosynthetic efficiency, and thereby increasing biomass, oil, chlorophyll, and protein content. However, traditional abiotic stress methods for inducing the accumulation of energy storage substances in microalgae, such as high light intensity, high salinity, and heavy metals, will affect the growth of microalgae and will ultimately limit the efficient accumulation of energy storage substances. Therefore, the addition of phytohormones not only helps to reduce production costs but also improves the efficiency of biofuel utilization. However, accurate and sensitive phytohormones determination and analytical methods are the basis for plant hormone research. In this study, the characteristics of phytohormones in microalgae and research progress for regulating the accumulation of energy storage substances in microalgae by exogenous phytohormones, combined with abiotic stress conditions at home and abroad, are summarized. The possible metabolic mechanism of phytohormones in microalgae is discussed, and possible future research directions are put forward, which provide a theoretical basis for the application of phytohormones in microalgae.

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“…Microalgae can offer opportunities such as nutrient removal e.g., macromolecules such as nitrates and phosphates that can trigger multiple and multiscale damages to the receiving environment due to eutrophication in water bodies (Fazal et al, 2018). The treatment of wastewaters using microalgae consortia offers advantages such as 1) cooperative interactions between the co-cultivated microorganisms can occur, enhancing the overall uptake of nutrients; and 2) these systems tend to be more resistant to environmental conditions oscillations (Salama et al, 2018). Besides, microalgae propagated in wastewater exhibit the advantages of having high photosynthetic efficiency, high biomass productivity, and it benefits from having a rapid growth rate (Li et al, 2018).…”

Section: Opportunities and Challengesmentioning

confidence: 99%

Biotechnological Applications of Microalgal Oleaginous Compounds: Current Trends on Microalgal Bioprocessing of Products

et al. 2020

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The microalgal biotechnology industry is expanding rapidly and currently gaining attention due to multiple availabilities of high-value products such as pigments, carbohydrates, proteins, nutraceuticals, biopharmaceuticals, and unique oleaginous compounds fractionated by biomass biorefinery. Microalgae are efficient primary producers in the terrestrial and marine biotopes. They are major sources of global oxygen and are gaining topical prominence due to their concomitant role in the phycoremediation of wastewater effluents and biomass production. Despite their minuscule size, microalgae critically contribute to climate change mitigation through carbon fixation and play a major role in bioenergy applications. Furthermore, carotenoids and phycobiliproteins are the main accessory light-harvesting complexes in microalgae and cyanobacteria. The topical biomedical and pharmaceutical applications of microalgae include anticancer, antidiabetic, antiHIV, antimalarial, antimicrobial, inter alia. The endowment of unique indigenous microalgae and utilization of these biological resources must be harnessed by the biorefinery industry to exploit microalgal biomass opportunities. Therefore, this manuscript factually and critically explores the current status of the biorefinery approach, topical biomedical and pharmaceutical applications, biofuel applications, genetic manipulation of microalgae for enhancement of product yield, challenges and presents prospects, pros and cons, and outlook of the microalgal biotechnology industry.

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Enhancement of microalgal growth and biocomponent-based transformations for improved biofuel recovery: A review

Cited by 60 publications

References 125 publications

Physicochemical and microbiological dynamics in composting of organic waste using a new bioreactor model

Physicochemical and microbiological dynamics in composting of organic waste using a new bioreactor model

The Active Phytohormone in Microalgae: The Characteristics, Efficient Detection, and Their Adversity Resistance Applications

Biotechnological Applications of Microalgal Oleaginous Compounds: Current Trends on Microalgal Bioprocessing of Products

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