Modeling of smart mixing regimes to improve marine biorefinery productivity and energy efficiency

Golberg, Alexander; Liberzon, Alex

doi:10.1016/j.algal.2015.05.021

Cited by 31 publications

(11 citation statements)

References 27 publications

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“…Although, in nature, Ulva grows primarily attached to hard substrates, it is frequently found growing in a floating stage within the water column. Cultivation of free‐floating algal biomass provides an opportunity to use water volumes for cultivation instead of large areas used for attached biomass cultivation, thus reducing the area used for cultivation . To test the potential of tumbling, air mixing, and external water exchange on the intensification of the Ulva sp.…”

Section: Offshore Cultivation In Cages With Tumbling Air Mixing and mentioning

confidence: 99%

“…Following the success of on‐land photobioreactors in providing high biomass yields when the major cultivation parameters of temperature, light, mixing, and nutrients were controlled, theoretically possible intensified offshore cultivation methods were proposed . However, to the best of our knowledge, the intensification methods that control key parameters offshore, have not been demonstrated in the field.…”

Section: Introductionmentioning

confidence: 99%

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Feasibility study of Ulva sp. (Chlorophyta) intensive cultivation in a coastal area of the Eastern Mediterranean Sea

Chemodanov

Robin

Jinjikhashvily

et al. 2019

Biofuels Bioprod Bioref

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Increasing biomass production yields is a critical challenge for macroalgae biorefineries. The continuous tumbling and mixing of free‐floating algae through water or airflow has been shown to increase the productivity of algae in land‐based cultivation systems. This approach has not been tested thoroughly in offshore cultivation. We report, here, a field feasibility study on the increase in green macroalga Ulva sp. growth rates in offshore cages, achieved by the combined effect of tumbling and mixing of the algae using influxes of water and air. The experimental system was tested in a shallow coastal area in central Israel, in the eastern Mediterranean Sea. A maximum daily growth rate of 19.2%, areal productivity of 33.72 g dry weight (DW) day−1 m−2, and volumetric yields of 37.78 g DW day−1 m−3, together with 38.47 ± 0.01% ash and 5.28% protein content on a dry matter basis were achieved in the cages with intensified cultivation in the first week of May 2017. Our study shows that cultivation with tumbling and mixing of biomass with air, and water exchange with the environment is a feasible method to increase Ulva sp. biomass productivity offshore. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd

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Section: Offshore Cultivation In Cages With Tumbling Air Mixing and mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Feasibility study of Ulva sp. (Chlorophyta) intensive cultivation in a coastal area of the Eastern Mediterranean Sea

Chemodanov

Robin

Jinjikhashvily

et al. 2019

Biofuels Bioprod Bioref

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“…In previous work, we have also shown that energy effi cient mixing could further improve the net energy balance of the marine biorefi nery 20 . We have also demonstrated the potential of the two-step fermentation approach as a means to increase the yields of ethanol production and carbon utilization from a complex macroalgae Ulva biomass 21 .…”

Section: Introductionmentioning

confidence: 84%

BioLEGO — a web-based application for biorefinery design and evaluation of serial biomass fermentation

2015

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The composition of feedstock biomass and the selection of fermenting microorganisms are critical factors in biorefinery design. Feedstock biomass composition is constrained by local supply materials, but microorganism selection affords considerable flexibility. Once biomass feedstock is identified, biorefinery designers need to select optimal fermenting organisms. While fermentation by microorganism communities can increase the range of digested biomass compounds and can be more resistant to infections, it has intrinsic problems in the context of species competition, process design and modeling — issues related to insufficient process control. Using a serial fermentation approach, we offset some of these issues to allow maximal process control, while benefiting from organism diversity to maximize feedstock conversion rates. Here, we describe BioLEGO, a freely available web-based application that enables computer-assisted a single and two-step multiorganism fermentation process design. BioLEGO is based on a modular modeling approach, enabling the generation of different fermentation configurations consisting of independent organism modules. BioLEGO supports the evaluation of possible biomass-to-product yields for biomass mixes or general media and recommends media changes to increase the process efficacy.

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“…It was assumed that the cultivation is done by extensive methods with ropes/cages. The opportunity to increase the cultivation depth by mixing was discussed in Golberg and Liberzon (2015). Insert on the bottom right corner shows the example offshore cultivation of macroalga from Ulva genus (van der Burg et al 2013) ( Figure adapted from Lehahn et al (2016).…”

Section: Exergy Efficiency Of Marine Biorefineriesmentioning

confidence: 99%

Pulsed Electric Fields and Electroporation Technologies in Marine Macroalgae Biorefineries

Robin¹,

Golberg²

2016

Handbook of Electroporation

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New resources are needed to provide food, fuels, and chemicals for the growing economies and population while insuring minimum environmental impacts. Biomass will play a key role in the challenge of tackling those issues. Sustainable raw materials for the production of food, animal feed, chemicals, and biofuels such as biodiesel, biobutanol, and bioethanol can be obtained from algal biomass. The cultivation and conversion of biomass into products is known as biorefinery. In particular, marine macroalgae (so-called seaweeds) biomass is a promising feedstock for biorefineries because of their high growth rates and its potential cultivation on salt water, avoiding competition for freshwater and arable lands. In addition, dissolved inorganic nutrients like nitrogen, phosphorous, and carbon are taken up by macroalgae, helping to alleviate eutrophication in seas and oceans. Using biological, chemical, and engineering advances of the past decades, new technologies to provide cost-efficient cultivation, harvesting, extraction, and processing of sustainable biofuels have yet to be elaborated. Pulsed electric

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Modeling of smart mixing regimes to improve marine biorefinery productivity and energy efficiency

Cited by 31 publications

References 27 publications

Feasibility study of Ulva sp. (Chlorophyta) intensive cultivation in a coastal area of the Eastern Mediterranean Sea

Feasibility study of Ulva sp. (Chlorophyta) intensive cultivation in a coastal area of the Eastern Mediterranean Sea

BioLEGO — a web-based application for biorefinery design and evaluation of serial biomass fermentation

Pulsed Electric Fields and Electroporation Technologies in Marine Macroalgae Biorefineries

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