Assessment of Chlorella sp. as a potential feedstock for biological methane production

Yoon

Syst Microbiol and Biomanuf

et al. 2020

Self Cite

Algal biomass has significant advantages over terrestrial plants in terms of CO 2 sequestration, biomass productivity, wastewater treatment along with multiple biobased products synthesis. Metabolic versatility and high carbohydrate content of microalgal biomass act as a potential alternative feedstock to fossil resources and contribute towards the biobased economy growth. Effective biomass utilization would play a key role to establish sustainable bioprocess development and technology translation to the industrial community. In this framework, the present review discusses the renewable resource potential of algal biomass and its complete utilization for multiple biobased products synthesis in a closed-loop biorefinery approach. Various methods are discussed to obtain high biomass growth and pretreatments to obtain the maximum sugars solubilization. Further, combined bioprocesses were discussed for the production of biohydrogen, biomethane, bioethanol, short-chain fatty acids (SCFA), medium-chain fatty acids (MCFA), and biopolymers in a closed-loop approach.

Section: Biomethane Productionmentioning

confidence: 99%

Section: Biomethane Productionmentioning

confidence: 99%

Biotechnological valorization of algal biomass: an overview

Yoon

Syst Microbiol and Biomanuf

et al. 2020

Self Cite

Encyclopedia of the UN Sustainable Development Goals

“…Microalgal biomass sequestrates CO 2 and is considered a promising renewable raw material for anaerobic digestion due to its sufficient content of carbohydrates and lignin-free structure. A study by Park et al (2020) optimizes the pretreatment of diluted acid chlorella sp. and subsequent production of biomethane.…”

Section: Relationship Between Clusters Of Terms Of Carbon Bio-utilizamentioning

confidence: 99%

“…The temperature is 64.1°C and the pretreatment time is 1.2 h. The methane yield was 302.22 ml COD and its production speed was 110.04 ml COD/g VSS-d. This study showed the efficiency of the utilization of algae biomass for biomethane production when fixing carbon dioxide (Park et al 2020). Serrà et al (2020) also examined the use of microalgae to fix CO 2 and restore wastewater while using its residues as a source of energy and biofuel for global sustainable development.…”

Section: Relationship Between Clusters Of Terms Of Carbon Bio-utilizamentioning

confidence: 99%

Bioenergy Alternatives for the Disposal of Carbon Oxides

Chernysh¹,

Yakhnenko²,

Plyatsuk³

et al. 2020

Bioenergy is energy derived from the transformation of solid, liquid, and gaseous products derived from biomass. According to the National Reporting to the United Nations Framework Convention on Climate Change, which follows the Intergovernmental Panel on Climate Change guidelines, "total CO 2 emissions" is defined. CO 2 emissions/removals from land use, land-use change, and forestry are often known with much less confidence than emissions in other sectors. In such cases, "total" emissions may be calculated as the sum of emissions for the energy, industrial processes, agriculture, and waste sectors (Total CO 2 emissions. Retrieved April 15, 2020, from the United Nations site for the MDG Indicators https://millenniumindicators.un.org/unsd/mdg/ Metadata.aspx?IndicatorId¼0&SeriesId¼750). Greenhouse gas emissions from the combustion of fossil fuels appear to be linked to the warming of the land in greenhouses. In principle, it is possible to remove carbon dioxide from point sources such as oil production or power plants and then liquefy CO 2 and inject it into underground aquifers. Deposition/removal of carbon dioxide are processes of its fixation/binding in a form that will not be freely available in the atmosphere and other gas streams. Introduction. The Environmental Challenges of Carbon Dioxide Utilization at Thermal Power Plants The long-term challenge for the energy sector is to achieve near-total decarbonization by 2050 to ensure that climate change objectives are met. Based on the existing fossil fuel infrastructure, coal and gas will continue to play a significant role in electricity generation. The processes of reducing carbon levels in coal and gas are largely due to the introduction of measures to capture (before or after fuel combustion), transport, and long-term storage of carbon contained in these fuels. According to experts of the Intergovernmental Panel on Climate Change under the IEA, in 25 EU countries, about 31% of all energy is produced from coal. The coal-fired thermal power plants (TPPs) generate the majority of the electricity and produce the highest rate of CO 2 per kilowatt-hour (Moazzem et al. 2012). Besides, lignite is widely used in Europe. Under such conditions, according to "An overview

“…In this study, Korean Chlorella sorokiniana KNUA114 and KNUA122, and Chlorella vulgaris KNUA104 were aseptically isolated from Ulleung Island. Previous observations of these strains suggest that Chlorellaceae is one of the important families of organisms that can be used as biological resources worldwide ( Morimura and Tamiya, 1954 ; Taub and Dollar, 1968 ; Kay and Barton, 1991 ; Park et al., 2020 ). The phylogenetic differences between the isolated C. sorokiniana and C. vulgaris strains were confirmed through morphological and molecular characterization.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Chlorella sorokiniana and Chlorella vulgaris fatty acid components under a wide range of light intensity and growth temperature for their use as biological resources

Yun

Kim

Yoon

2020

Heliyon

This study aims to characterize the potential of three strains of microalgal species ( Chlorella sorokiniana KNUA114 and KNUA122; C. vulgaris KNUA104) for use as feedstock, based on their fatty acid compositions. Each strain was molecularly identified using four marker genes ( ITS , SSU , rbcL , and tufA ) and phylogenetically characterized. C. sorokiniana and C. vulgaris collected from Ulleung Island, South Korea, were homologous with other known species groups. Samples' fatty acid components were measured using GC/MS analysis in growth temperatures of 10 °C, 25 °C, and 35 °C. The growth rate of C. sorokiniana strains was higher than that of C. vulgaris under high-temperature conditions, confirming the potential industrial applicability of the former as feedstock material. Additionally, saturated fatty acid contents and productivities increased as biological resources of the C. sorokiniana strains were higher than those of C. vulgaris under high light intensity and temperature conditions. These results suggest that the fatty acid components of C. sorokiniana strains may potentially be used as biological resources (e.g., feedstock).