A comparative life cycle assessment of microalgae production by CO2 sequestration from flue gas in outdoor raceway ponds under batch and semi-continuous regime

Yadav, Geetanjali; Dubey, Brajesh; Sen, Ramkrishna

doi:10.1016/j.jclepro.2020.120703

Cited by 113 publications

(23 citation statements)

References 44 publications

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“…However, due to the fact that it has been replaced by the ReCiPe method, the use of this method is proposed. The literature of the subject also uses assessment methods whose assessment result is presented in CO2 equivalent (e.g., IPCC 2013 GWP 100a or Greenhouses Gas Protocol) [27,28]. However, due to the way the results were presented, the ReCiPe endpoint (E) assessment method was used.…”

Section: Methodology Of Lca Analysismentioning

confidence: 99%

Ecological and Economic Benefits of the “Medium” Level of the Building Thermo-Modernization: A Case Study in Poland

Adamczyk

Dylewski

2020

Energies

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Energy saving is at the heart of sustainable development in the context of climate change. Saving energy is not only the amount of energy that we save, but also reducing emissions of pollutants to the atmosphere, as well as reducing the consumption of energy resources that are used to produce energy. Reducing pollutant emissions and the use of energy resources can be achieved by increasing the use of renewable energy sources, but at present, this method of obtaining energy in the world is not representative. It should be noted that renewable energy devices throughout the life cycle generate environmental impact. Similar to this situation, the building’s thermo-modernization, which is focused on reducing the pressure on the environment of the building’s user, also has an impact on the environment throughout the building’s life cycle. Determining this environmental impact and ecological or economic benefits or costs is the purpose of the following article. Thermo-modernization of the building, for the purposes of the article, is understood as thermal insulation of walls and replacement of the heat source for heating the building and preparation of hot utility water. The need to replace the heat source with a much more ecological one results in Poland from provincial legal regulations announced by virtue of a resolution. In the study, data from the Ecoinvent data library included in the SimaPro computer program was used for the LCA (Life Cycle Assessment) analysis. As a result of thermo-modernization of the representative buildings, large ecological benefits were obtained, while economic costs remain at a high level.

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Section: Methodology Of Lca Analysismentioning

confidence: 99%

Ecological and Economic Benefits of the “Medium” Level of the Building Thermo-Modernization: A Case Study in Poland

Adamczyk

Dylewski

2020

Energies

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“…On the other hand, continuous cultivation has been reported to obtain higher microalgae activity as they are maintained in the exponential growth phase for longer (Assunção & Malcata, 2020; Umamaheswari & Shanthakumar, 2016). According to Yadav, Dubey, and Sen (2020), semicontinuous feeding is the most suitable option for large‐scale microalgae cultivation for its simplicity and ease of implementation. In this respect, González‐Camejo, Jiménez‐Benítez, et al (2019a) and González‐Camejo, Aparicio, et al (2020) operated a pilot‐scale MPBR system semicontinuously, only feeding the culture during light hours to increase microalgae activity.…”

Section: Microalgae Cultivationmentioning

confidence: 99%

“…pH control is often performed by injecting CO 2 (either pure or contained in flue gases), avoiding the carbon limitation of wastewater simultaneously (Acién et al, 2021;Assunção & Malcata, 2020). In this respect, Yadav et al (2020) reported an increase of 62% of microalgae cell density when CO 2 was added to the culture.…”

Section: Ph Controlmentioning

confidence: 99%

Outdoor microalgae‐based urban wastewater treatment: Recent advances, applications, and future perspectives

et al. 2021

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Although microalgae‐based wastewater treatment has been traditionally carried out in extensive waste stabilization ponds, recent trends focus on the use of microalgae to apply the circular economy principles in the wastewater treatment sector due to the capacity of algae to absorb carbon dioxide while recovering nutrients from sewage. To this aim, the development of new intensive microalgae‐based systems with higher efficiency and level of process control is required. Results obtained for these systems at lab scale are generally promising. However, upscaling to outdoor conditions is often uncertain. Some advances have been made in terms of applying open systems at large scale. However, there are still some issues related to land requirements and the economic feasibility and robustness of the process that have to be overcome to widely implement these systems. This article aims at describing the main design and operating factors regarding outdoor microalgae cultivation. It will also explain some microalgae cultivation technologies to treat wastewater, showing their advantages, disadvantages, and the possibility to treat different wastewater streams with microalgae cultures. Future perspectives of this biotechnology will be commented as well. This article is categorized under: Engineering Water > Engineering Water

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“…Cultivation of microalgae offers distinct advantages that ensure process viability and sustainability as feedstock for clean biofuel energy production (Chisti 2008;Li et al, 2008;Singh and Gu 2010;Carmichael et al, 2017;Yadav et al, 2020). The most important advantages include: 1) increased biomass production capability, 2) minimal nutrient requirements, fewer water needs and even possibility of using wastewaters containing residual nutrients and also no requirements for herbicides or pesticides, with expected environmental and economic gains, 3) less land demand, thus avoiding competition with other landbased crops also taking into account the potential for cultivation in non-arable areas, and 4) resistance of several species to salinity or even growth in marine environment with obvious benefits for cultivation in coastal areas.…”

Section: Introductionmentioning

confidence: 99%

Optimizing Microalgal Biomass Feedstock Selection for Nanocatalytic Conversion Into Biofuel Clean Energy, Using Fuzzy Multi-Criteria Decision Making Processes

2021

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Biofuel production from microalgae non-food feedstock is a challenge for strengthening Green energy nowadays. Reviewing the current technology, there is still reluctance in investing towards the production of new algal strains that yield more oil and maximize capital gains. In the current work, the microalgal feedstock selection problem is investigated for increased lipid production and nano-catalytic conversion into clean biofuel. For that purpose, a variety of Fuzzy Multi-Criteria Decision Making processes and a multitude of Optimization criteria spanning to technological, environmental, economic, and social aspects are used. The strains selected for the analysis are Chlorella sp., Schizochytrium sp., Spirulina sp., and Nannochloropsis sp. The methods applied are fuzzy analytic hierarchy process, FTOPSIS (fuzzy technique for the order of preference to the ideal solution), and FCM (fuzzy cognitive mapping). Pairwise comparison matrices were calculated using data from extensive literature review. All aforementioned fuzzy logic methodologies are proven superior to their numeric equivalent under uncertain factors that affect the decision making, such as cost, policy implications, and also geographical and seasonal variation. A major finding is that the most dominant factor in the strain selection is the high lipid content. Moreover, the results indicate that the Chlorella Vulgaris microalgae is ranked as the best choice by the FTOPSIS method followed by the Nannochloropsis strain, and Spirulina Platensis was found to be the last in performance. The best and worst case scenario run with FCM experimentally verify this choice indicating that Chlorella Vulgaris follows this trend of selection mostly with the technological and the economic criteria for both the sigmoid and the hyperbolic tangent deep-learning functions used.

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A comparative life cycle assessment of microalgae production by CO2 sequestration from flue gas in outdoor raceway ponds under batch and semi-continuous regime

Cited by 113 publications

References 44 publications

Ecological and Economic Benefits of the “Medium” Level of the Building Thermo-Modernization: A Case Study in Poland

Ecological and Economic Benefits of the “Medium” Level of the Building Thermo-Modernization: A Case Study in Poland

Outdoor microalgae‐based urban wastewater treatment: Recent advances, applications, and future perspectives

Optimizing Microalgal Biomass Feedstock Selection for Nanocatalytic Conversion Into Biofuel Clean Energy, Using Fuzzy Multi-Criteria Decision Making Processes

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