Recent developments on biofuels production from microalgae and macroalgae

Kumar, Kanhaiya; Ghosh, Supratim; Angelidaki, Irini; Holdt, Susan Løvstad; Karakashev, Dimitar Borisov; Alvarado-Morales, Merlin; Das, Debabrata

doi:10.1016/j.rser.2016.06.055

Cited by 99 publications

(35 citation statements)

References 95 publications

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“…In enzymatic hydrolysis, starch is consumed and fermentable sugars are produced by using two enzymes: α ‐amylase and glucoamylase. Being a cellulosic material, cellulase is frequently used in the hydrolysis of algal biomass . Microalgae species such as Chlorella vulgaris are a high source of starch (37 wt %); thus C. vulgaris biomass could be a good supply of ethanol at up to 65 % ethanol conversion efficiency .…”

Section: Biofuel Production Processesmentioning

confidence: 99%

Biochemical Conversion of Microalgae Biomass into Biofuel

Hossain

2019

Chem Eng & Technol

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Biofuel production via microalgae is a promising and sustainable alternative to replace the typical fossil fuel that is the main contributor to the global warming. However, for a cost‐effective biofuel production, further advanced research is still needed for large‐scale operation. This article is a tutorial review on conversion processes of microalgae into biofuel, with emphasis on biochemical conversion. The following topics are discussed: (i) microalgae biomass and its composition, (ii) thermochemical conversion, (iii) chemical conversion, and (iv) biochemical conversion. In addition, various aspects of anaerobic digestion, digester designs, and effects of operating conditions on the production of methane, bioethanol, and biohydrogen are discussed. The general kinetics of biomass conversion into biofuel is presented. This study suggests, if that biomass contains less than 50 % moisture, then it is recommended to use the direct combustion method; otherwise, biochemical conversion is the most suitable process to biofuel production.

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Section: Biofuel Production Processesmentioning

confidence: 99%

Biochemical Conversion of Microalgae Biomass into Biofuel

Hossain

2019

Chem Eng & Technol

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“…At the same time, due to economic considerations it may be advisable to increase the organic loading rate (OLR), the economic optimums in the same experiments of 2.0 (g VS) L −1 d −1 OLR and 25 d HRT were recommended for achieving biogas and methane yields of 0.313 and 0.490 L (g VS) −1 , respectively. It should be noted, however, that the heat demand and investment requirement of biogas production from algae is significantly higher than that of traditional biogas feedstocks [19] and can be limited by the low C/N ratio of high protein content algae species which may lead to ammonia inhibition [18].…”

Section: The Characteristic Technological Parameters Of Cogeneration mentioning

confidence: 99%

Economic Analysis of Pellet Production in Co-Digestion Biogas Plants

et al. 2018

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In our paper we examine the economics of a technological process which utilizes the separated biogas plant digestate as the primary material and, as auxiliary material, the waste heat produced by the cogeneration process, to produce a marketable pellet which can be used in two ways (to supply soil nutrients and heat energy). Using multivariate linear regression model we developed an equation for the biogas yield from the modelled production recipe and expected nutrient pellet prices, and sensitivity analysis were also performed for the substrate dry matter content. We found that pellets can be produced at a cost of 88-90 EUR/ton with a 6 to 10% dry matter substrate content and that, primarily, sales of pellets for heating justify pelleting; producer's own use and use for nutrient purposes can only be justified in exceptional cases. In the case of dry solid content above 5%, the process does not require the total amount of waste heat; some of this can be used to cover other heat requirements.

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“…Imitating the same procedure at an industrial scale can solve the grave problems of geopolitics -the unbalance between the countries possessing the crude oil sources and those that are the largest consumers. A recent comprehensive review of the tasks and problems aiming at the particular case of bioethanol is available in [11] and more general recent progress in developing oil from algae is discussed in [12]. Pilot scale studies and specifically a design of an airlift bioreactor for the algae growing purpose with fluidic oscillator induced microbubbles are described in detail in.…”

Section: Enhanced Transport Phenomenamentioning

confidence: 99%

What can be done with microbubbles generated by a fluidic oscillator? (survey)

Tesař

2017

EPJ Web Conf.

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Abstract.Recently discovered possibility of generating sub-millimetre bubbles by means of pulsating the inlet gas flow by a fluidic oscillator has opened a way to many interesting and advantageous engineering applications. Some of them have been known before, but were too inefficient and nearly forgotten. Now they deserve discussing in the new perspective. Other, applications, new ones, appear now in literature at a rapid pace. This paper, by providing a survey of already existing possibilities and advantages, aims at providing the readers an inspiration for their own developments.

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Recent developments on biofuels production from microalgae and macroalgae

Cited by 99 publications

References 95 publications

Biochemical Conversion of Microalgae Biomass into Biofuel

Biochemical Conversion of Microalgae Biomass into Biofuel

Economic Analysis of Pellet Production in Co-Digestion Biogas Plants

What can be done with microbubbles generated by a fluidic oscillator? (survey)

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