Macroalgal Biorefineries for the Blue Economy

Golberg, Alexander; Robin, Arthur; Zollmann, Meiron; Traugott, Hadar; Palatnik, Ruslana Rachel; Israel, Álvaro

doi:10.1142/11937

Cited by 8 publications

(7 citation statements)

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“…The model was calibrated using experimental data from a 5 L bottom aerated (1 l min -1 ) cylindrical polyethylene sleeve located in a controlled room with a constant temperature (21-22 ℃) and light cycle (14:10 light hours : dark hours) and intensity (80-110 µmol photons m -2 s -1 ). Ulva rigida biomass was stocked in the reactor at a density of 1 g FW L -1 with an illuminated area of 0.028 m 2 . Additional details about the reactor are available in the Methods section.…”

Section: Modelmentioning

confidence: 99%

“…Marine macroalgae (seaweed) can supply feedstock for biorefineries for the production of food ingredients, chemicals, fuels, pharmaceuticals, and more; thus utilizing abundant seawater and ocean areas for the benefit of future bio-economy 1,2 . A sustainable large-scale commercial use of macroalgae feedstock requires extensive macroalgae farming, or seagriculture 3 , as natural stocks are limited and wild-stock harvesting leads inevitably to over-exploitation 4 .…”

Section: Introductionmentioning

confidence: 99%

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Modeling of growth ofUlvasp. macroalgae in a controlled photobioreactor based on nitrogen accumulation dynamics

Zollmann

Liberzon

Golberg

2023

Preprint

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Macroalgae biomass production models that capture nutrient dynamics, temperature, light, and salinity are important for the design and operation of large-scale farms. The goal of this study is to understand how the nitrogen fertilizing regime, relating to fertilizing dose (micro-molar week-1), amplitude (micro-molar N), and duration (hours), affects the dynamics of nitrogen content and biomass production of the Ulva sp. macroalgae. We hypothesize that the nitrogen fertilizing regime controls the Ulva Nitrogen Use Efficiency (NUE), defined here as the fraction of fertilizer nitrogen that is utilized and allocated to yield N, and, accordingly, also nitrogen assimilation in the biomass and the growth rate. We test this hypothesis by measuring internal nitrogen and biomass weight and by calculating NUE under various fertilization regimes in controlled photobioreactors. Based on this experimental data, we developed a biomass productivity model that predicts nitrogen and biomass dynamics in time over three weeks of cultivation. This study points out efficient fertilizing regimes and enables the development of a comprehensive understanding of the dynamic relationship between external N, internal N, and biomass production of the Ulva sp. macroalgae under varying external N levels, which is important for real-world agricultural applications. This study provides a better understanding of the external N-internal N-biomass triangle followed by an improved dynamic cultivation model, enabling better control of nutrient application and biomass production in macroalgae farming for a sustainable marine bioeconomy.

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Section: Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling of growth ofUlvasp. macroalgae in a controlled photobioreactor based on nitrogen accumulation dynamics

Zollmann

Liberzon

Golberg

2023

Preprint

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“…Humans should radically change their attitude to the use of water. Mankind has already come too close to the line beyond which further economic growth, if it continues to be based on the consumer principles of water use, can upset the ecological balance of the planet (Golberg, 2020).…”

Section: The Blue Economy and The Peculiarities Of The Use Of Water R...mentioning

confidence: 99%

The Blue Economy: A New Trend in Social Development

Sverdan

2021

GBDEJ

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The purpose of the paper is to study the current problems of ecology and environmental protection, which is associated with modern sustainable trends in economic development. The growth of the world economy as a whole and the economic progress of most developed market economies is leading to increased use of natural resources and, at the same time, to increasing depletion and pollution of the environment. The purpose is to define the essence, the prerequisites for the emergence and development of the blue economy as a modern concept of interaction between society and nature through the economy, as well as to reflect the preconditions for the activation of a common green movement on a global scale in order to preserve nature and ensure the natural conditions of human habitation. The topic of the article is due to the need to disclose the current economic dynamics and the pace of social progress and its impact on the environment. In this regard, the essence of the blue economy, directions and principles of its implementation for the restoration and strengthening of natural potential are considered. Methodology. An objective and adequate assessment and analysis of the dynamics and directions of the world economy in terms of increasing economic potential and the production of economic goods to ensure the well-being of society makes it possible to properly assess the level of impact on nature and the environment. The results of such assessments and calculations make it possible to identify and correct existing and prevent the occurrence of potential errors in the choice of priorities for socio-economic policy and in making effective decisions in the sphere of production. The study is based on an assessment of the interaction between the economy and the environment at the present stage of civilizational progress. Results. The issues of modern economic trends and the environment and ecology are investigated. The essence, specificity and necessity of introducing the blue economy in modern conditions are defined. The need to protect nature and reduce pollution is becoming more and more relevant to modern society. Practical implications. The state of the natural environment and the possibilities of saving and improving it are studied. An adequate assessment of the state of nature and natural resources will allow the global community to conduct a balanced and effective socio-economic and environmental policy for the harmony of society and the nature in which it lives. Value / originality. It has been established that nature is the basis of the social and economic life of society and at the same time the primary goal of the progress of civilization. Economics is simply the means by which nature enables the creation of wealth for society. Nature can exist without humanity, but humanity cannot exist without nature. That is why the primitive form of nature and a clean environment is especially relevant, particularly in today's environment. To this end, a new type of environmental policy as the "blue economy" has begun to be introduced in the modern world.

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“…The global potential of offshore biorefineries to provide for biomass for proteins, platform chemicals, and energy was analyzed by 6 , using a metabolism model of the green marine macroalga Ulva , coupled with essential inputs from climatological oceanographic data. Ulva is an interesting biomass for biorefinery as it grows globally and it was already converted to protein, cellulose, starch, ulvan (bioactive polisacharide), fatty acids, minerals, biocrude, biochar, ethanol, biogas 7 , and polyhydroalkanolyes (PHA) 8 , all of which could serve as building blocks for a sustainable bioeconomy 9 .…”

Section: Introductionmentioning

confidence: 99%

Cultivation ofUlvasp. offshore the Eastern Mediterranean Sea in experimental bioreactors: seasonal growth dynamics and environmental effects

Zollmann

Liberzon

Palatnik

et al. 2023

Preprint

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Offshore macroalgae production could provide an alternative source of biomass for food, materials and energy. However, the offshore environment in general, and specifically the Eastern Mediterranean Sea (EMS) offshore, is a high energy and low nutrients environment and thus is challenging for macroalgae farming. This study aims to understand the effects of season, depth, and fertilization duration on growth rates and chemical composition in offshore Ulva biomass production and develop a predictive model suitable to offshore conditions. We hypothesize that offshore Ulva growth rates and chemical composition will follow a seasonal trend and that applying rapid onshore fertilization could refill nutrient storages and enable continuous offshore cultivation. We test this hypothesis by measuring Ulva biomass and internal nitrogen in offshore experiments in the nitrogen-poor EMS a few kilometers offshore the Israeli coast. We construct a predictive cultivation model to estimate N concentrations in the sea during experiments. This study demonstrates the feasibility of growing Ulva sp. offshore the EMS with an onshore nutrient supply and develops a better understanding of seasonal growth dynamics and environmental effects (nitrogen, waves, depth, etc.). Furthermore, the study showcases the applicability of the macroalgae cultivation model in the offshore environment and its potential contribution throughout the whole lifecycle of seaweed cultivation.

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Macroalgal Biorefineries for the Blue Economy

Cited by 8 publications

References 0 publications

Modeling of growth ofUlvasp. macroalgae in a controlled photobioreactor based on nitrogen accumulation dynamics

Modeling of growth ofUlvasp. macroalgae in a controlled photobioreactor based on nitrogen accumulation dynamics

The Blue Economy: A New Trend in Social Development

Cultivation ofUlvasp. offshore the Eastern Mediterranean Sea in experimental bioreactors: seasonal growth dynamics and environmental effects

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