Role of Algae in CO2 Sequestration Addressing Climate Change: A Review

Paul, Vishal; Shekharaiah, P. S. Chandra; Kushwaha, Shivbachan; Sapre, Ajit; Dasgupta, Santanu; Sanyal, Debanjan

doi:10.1007/978-981-32-9578-0_23

Cited by 14 publications

(5 citation statements)

References 42 publications

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“…In addition, there are concerns about the potential negative impacts of ocean fertilization and geoengineering (Dixon et al, 2014; McGee et al, 2018). Alternatively, due to their high growth rates under nutrient‐replete conditions, mass cultures of microalgae in open ponds or closed photobioreactor (PBR) systems have been proposed as a tool for carbon sequestration (Paul et al, 2020; Singh & Ahluwalia, 2013). However, to date, the land occupation and culture cost hinder its application at scale.…”

Section: Coastal and Marine Carbon Sequestration (Results Section)mentioning

confidence: 99%

A review of existing and potential blue carbon contributions to climate change mitigation in the Anthropocene

Gao

Beardall

Jin

et al. 2022

Journal of Applied Ecology

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1. The atmospheric concentration of CO 2 is steadily increasing and causing climate change. To achieve the Paris 1.5 or 2°C target, negative emission technologies must be deployed in addition to reducing carbon emissions. The ocean is a large carbon sink but the potential of marine primary producers to contribute to carbon neutrality remains unclear.2. Here we review the alterations to carbon capture and sequestration of marine primary producers (including traditional 'blue carbon' plants, microalgae and macroalgae) in the Anthropocene, and, for the first time, assess and compare the potential of various marine primary producers to carbon neutrality and climate change mitigation via biogeoengineering approaches.3. The contributions of marine primary producers to carbon sequestration have been decreasing in the Anthropocene due to the decrease in biomass driven by direct anthropogenic activities and climate change. The potential of blue carbon plants (mangroves, saltmarshes and seagrasses) is limited by the available areas for their revegetation. Microalgae appear to have a large potential due to their ubiquity but how to enhance their carbon sequestration efficiency is very complex and uncertain. On the other hand, macroalgae can play an essential role in mitigating climate change through extensive offshore cultivation due to higher carbon sequestration capacity and substantial available areas. This approach seems both technically and economically feasible due to the development of offshore aquaculture and a well-established market for macroalgal products. Synthesis and applications.This paper provides new insights and suggests promising directions for utilizing marine primary producers to achieve the Paris temperature target. We propose that macroalgae cultivation can play an essential role in attaining carbon neutrality and climate change mitigation, although its ecological impacts need to be assessed further.

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Section: Coastal and Marine Carbon Sequestration (Results Section)mentioning

confidence: 99%

A review of existing and potential blue carbon contributions to climate change mitigation in the Anthropocene

Gao

Beardall

Jin

et al. 2022

Journal of Applied Ecology

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“…Numerous studies have warned against geoengineering and ocean fertilization [42,43]. Large-scale microalgae cultures in open ponds or closed photobioreactor (PBR) systems may be able to store carbon because they proliferate in nutrient-rich environments [44,45]. This approach has little acceptance due to land acquisition and cultural issues.…”

Section: Microalgaementioning

confidence: 99%

The Existence of Blue Carbon and its Prospective Role in the Preservation of Carbon Stocks and the Mitigation of Climate Change

Girkar,

Kunjir,

Bhusare

et al. 2024

AJOCR

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The substantial rise in carbon emissions can be attributed to the initiation of the industrial revolution in the 17th century. The increase in global temperature is linked to higher concentrations of atmospheric carbon dioxide. The anticipated increase in international sea levels is predicted to affect a considerable portion of the world's population significantly. The susceptibility of blue carbon ecosystems to climate change prompts inquiries regarding their capacity to operate effectively in the future while simultaneously delivering ecological advantages to coastal communities, including climate change adaptation. The primary emphasis of the study was on blue carbon, a term used to describe the process of carbon sequestration in coastal and marine ecosystems to mitigate the dangers associated with climate change.

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“…In addition to the economic potential of 3G biorefineries, their environmental impact can be equal or even more significant, provided that CO 2 , as the main carbon source for microalgae growth, is sequestrated from flue gases [22][23][24]. Compared to terrestrial plants, microalgae exhibit about 10 (up to 50) times larger CO 2 conversion capacity [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Tolerant to CO2 Excess Microalgae for the Production of Multiple Biochemicals in a 3G Biorefinery

2023

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To date, the positive environmental impact of microalgae-based technologies has been demonstrated in numerous studies. However, there is still a number of major technical and economic obstacles to overcome. Therefore, further research and innovation are needed for the development and commercial exploitation of large-scale integrated and sustainable processes, based on robust ‘industrial’ microalgal strains and novel photobioreactors (PBRs). Note that the advancement of intensified microalgal cultivation processes can facilitate the economically feasible co-production of microalgal biomass and value-added biochemicals. In this context, the goal of the present investigation was to compare several microalgal strains based on a set of productivity criteria, including the maximum biomass growth and the maximum concentration of total biochemicals (i.e., carbohydrates, proteins, and lipids) under CO2 excess conditions (10% v/v). It was found that the wild type strain of Stichococcus sp. fully meets the above productivity criteria. In particular, a biomass concentration of 1.68 g·L−1 and a concentration of total biochemical products of 1.4 g·L−1 were measured in batch cultivation experiments in flasks using the selected strain. Further studies were performed in two different PBRs. Cultivation in a conventional stirred tank PBR showed successful scaling of the bioprocess, whereas cultivation in an innovative tubular recirculating PBR resulted in maximization of both biomass concentration (3.66 g·L−1) and total biochemical products concentration (3.33 g·L−1).

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Role of Algae in CO2 Sequestration Addressing Climate Change: A Review

Cited by 14 publications

References 42 publications

A review of existing and potential blue carbon contributions to climate change mitigation in the Anthropocene

A review of existing and potential blue carbon contributions to climate change mitigation in the Anthropocene

The Existence of Blue Carbon and its Prospective Role in the Preservation of Carbon Stocks and the Mitigation of Climate Change

Evaluation of Tolerant to CO2 Excess Microalgae for the Production of Multiple Biochemicals in a 3G Biorefinery

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