Photosynthetic productivity of conical helical tubular photobioreactors incorporating <i>Chlorella </i>sp. under various culture medium flow conditions

Murakami, Masahiko; Watanabe, Yoshitomo; Okawa, Tomio; Saiki, Hiroshi

doi:10.1002/bit.1103

Cited by 47 publications

(23 citation statements)

References 10 publications

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“…The single tubes can be straight, they can follow a meandering course either flat on the ground or ordered in panels or coils (so called helical reactor [42][43][44] [8] and B) dome reactor after Sato [36], a large installation (hectars) has been build up at BioReal (Maui, USA).…”

Section: Commonly Employed Reactor Designsmentioning

confidence: 99%

Design principles of photo‐bioreactors for cultivation of microalgae

Posten

2009

Engineering in Life Sciences

682

361

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The present hype in microalgae biotechnology has shown that the topic of photobioreactors has to be revisited with respect to availability in really large scale measured in hectars footprint area, minimization of cost, auxiliary energy demand as well as maintenance and life span. This review gives an overview about present designs and the basic limiting factors which include light distribution to avoid saturation kinetics, mixing along the light gradient to make use of light/ dark cycles, aeration and mass transfer along the vertical or horizontal main axis for carbon dioxide supply and oxygen removal and last but not least the energy demand necessary to fulfil these tasks. To make comparison of the performance of different designs easier, a commented list of performance parameters is given. Based on these critical points recent developments in the areas of membranes for gas transfer and optical structures for light transfer are discussed. The fundamental starting point for the optimization of photo-bioprocesses is a detailed understanding of the interaction between the bioreactor in terms of mass and light transfer as well as the microalgae physiology in terms of light and carbon uptake kinetics and dynamics.

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Section: Commonly Employed Reactor Designsmentioning

confidence: 99%

Design principles of photo‐bioreactors for cultivation of microalgae

Posten

2009

Engineering in Life Sciences

682

361

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“…An artificial light sometime replaces natural light to enhance microalgae growth. However, the use of artificial light adds to the investment costs, leading to the helical-tubular photobioreactors only being adequate for the manufacture of high-value added products (Morita et al, 2001;Briassoulisa et al, 2010).…”

Section: Closed Systemmentioning

confidence: 99%

A Review: Microalgae and Their Applications in CO2 Capture and Renewable Energy

Klinthong

Yang

Huang

et al. 2015

Aerosol Air Qual. Res.

217

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Fossil fuels, which are recognized as unsustainable sources of energy, are continuously consumed and decreased with increasing fuel demands. Microalgae have great potential as renewable fuel sources because they possess rapid growth rate and the ability to store high-quality lipids and carbohydrates inside their cells for biofuel production. Microalgae can be cultivated on opened or closed systems and require nutrients and CO 2 that may be supplied from wastewater and fossil fuel combustion. In addition, CO 2 capture via photosynthesis to directly fix carbon into microalgae has also attracted the attention of researchers. The conversion of CO 2 into chemical and fuel (energy) products without pollution via this approach is a promising way to not only reduce CO 2 emissions but also generate more economic value. The harvested microalgal biomass can be converted into biofuel products, such as biohydrogen, biodiesel, biomethanol, bioethanol, biobutanol and biohydrocarbons. Thus, microalgal cultivation can contribute to CO 2 fixation and can be a source of biofuels. This article reviews the literature on microalgae that were cultivated using captured CO 2 , technologies related to the production of biofuels from microalgae and the possible commercialization of microalgae-based biofuels to demonstrate the potential of microalgae. In this respect, a number of relevant topics are addressed: the nature of microalgae (e.g., species and composition); CO 2 capture via microalgae; the techniques for microalgal cultivation, harvesting and pretreatment; and the techniques for lipid extraction and biofuel production. The strategies for biofuel commercialization are proposed as well.

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“…Research on algal production rates for biofuels and commercial products has lead to a plethora of work on open bioreactors, such as ponds and raceway flumes [4,, and closed bioreactors, such as vertical , horizontal [34,40, and helical tubes [97,[143][144][145][146][147][148][149][150][151][152][153][154], flat plates [66,, and other unique designs [133,[185][186][187][188][189]. This research dates back to the early 1950s and was chronicled in a historical perspective by Borowitzka [190].…”

Section: Introductionmentioning

confidence: 99%

Dependency of Microalgal Production on Biomass and the Relationship to Yield and Bioreactor Scale-up for Biofuels: a Statistical Analysis of 60+ Years of Algal Bioreactor Data

Granata

2016

Bioenerg. Res.

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Since the 1950s, research has been undertaken to promote algal oil as a sustainable alternative to fossil fuels. This paper statistically analyzed 317 studies of algal bioreactors to determine the interdependence of biological and physical factors affecting oil yield. Algal growth rates in bioreactors often (71 %) exceeded maximal growth rates cited in the literature, and biomass was generally higher than maximum values cited for laboratory cultures. Growth rate decreased with increasing biomass, and biomass, not growth, dominated production rate, which was higher in closed than in open bioreactors. Except for Chlorella cultured in horizontal tubular reactors, there were no statistical differences in algal production when grown in different types of reactors. Production decreased with increasing bioreactor volume, but increased with surface to volume ratio of the bioreactor. In contrast, estimated oil yields increased with bioreactor volume. Four groups of bioreactors were identified based on their oil yields and biomass production: (1) higher yields with lower production were limited to open systems with volumes ≥10 4 L; (2) higher yields with higher production were almost exclusively closed bioreactors from 10 2 to 10 3 L; (3) lower yields with higher production were closed systems from 3 to 99 L; and (4) lower yields with lower production were a mix of open and closed systems with diverse volumes. Based on these groups, it is suggested that intermediate volume bioreactors with higher surface to volume ratios could give higher yields and production rates and would avoid the environmental and scale-up problems inherent in large bioreactors currently being used commercially to culture microalgae.

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Photosynthetic productivity of conical helical tubular photobioreactors incorporating Chlorella sp. under various culture medium flow conditions

Cited by 47 publications

References 10 publications

Design principles of photo‐bioreactors for cultivation of microalgae

Design principles of photo‐bioreactors for cultivation of microalgae

A Review: Microalgae and Their Applications in CO2 Capture and Renewable Energy

Dependency of Microalgal Production on Biomass and the Relationship to Yield and Bioreactor Scale-up for Biofuels: a Statistical Analysis of 60+ Years of Algal Bioreactor Data

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