Margin: Atas 3cm dan bawah 2 cm Margin: Kanan dan kiri 2,5 cm NOTE Every author must fill Copyright Transfer Form that can be downloaded in here. Upload instruction can read in here. Decarbonization with Microalgae and Utilization of Microalgae in Biofuel Production: A Review Upaya Dekarbonisasi Menggunakan Mikroalga dan Pemanfaatan Mikroalga dalam Pembuatan Biofuel: Sebuah Ulasan Dwi Agustin Irawan1*), Faya Nurin Aggraini1) Jember University, Department of Chemical Engineering, Indonesia *corresponding email: tinirawan567@gmail.com 1) Received: DD/MM/YY; Revised: DD/MM/YY; Accepted: DD/MM/YY Abstract Carbon dioxide (CO2) has become a major focus in global climate change. This article discusses the potential use of microalgae in decarbonization and biofuel production as a solution to address the CO 2 emission problem. Microalgae have a unique ability to absorb CO2 through photosynthesis, even more efficiently than terrestrial plants. They can also be used as feedstock for environmentally friendly biodiesel production. Nonetheless, challenges such as low biomass productivity and production costs are still a bottleneck. This review identifies also overcoming these challenges by considering the use of waste resources and improved cultivation techniques. In addition, the article discusses future opportunities to increase the use of microalgae in decarbonization efforts. With technological innovation and proper resource management, microalgae have great potential to contribute to reducing CO2 impact and achieving decarbonization goals. Keywords: Carbon dioxide, CO2 emissions, decarbonization, microalgae, biofuel Abstrak Karbon dioksida (CO2) telah menjadi fokus utama dalam perubahan iklim global. Artikel ini membahas potensi penggunaan mikroalga dalam dekarbonisasi dan produksi biofuel sebagai solusi untuk mengatasi masalah emisi CO2. Mikroalga memiliki kemampuan unik dalam menyerap CO2 melalui fotosintesis, bahkan lebih efisien daripada tanaman terestrial. Mereka juga dapat digunakan sebagai bahan baku untuk produksi biodiesel yang ramah lingkungan. Meskipun demikian, tantangan seperti produktivitas biomassa yang rendah dan biaya produksi masih menjadi hambatan.Kajian ini mengidentifikasi juga mengatasi tantangan-tantangan ini dengan mempertimbangkan penggunaan sumber daya limbah dan teknik budidaya yang ditingkatkan. Selain itu, artikel ini membahas peluang di masa depan untuk meningkatkan penggunaan mikroalga dalam upaya dekarbonisasi. Dengan inovasi teknologi dan manajemen sumber daya yang tepat, mikroalga memiliki potensi besar untuk berkontribusi dalam mengurangi dampak CO2 dan mencapai tujuan dekarbonisasi. Kata kunci: Karbon dioksida, emisi CO2, dekarbonisasi, mikroalga, biofuel 1. Introduction Carbon dioxide is the largest contributor to affecting climate change, which is currently the most prominent global issue [1, 2]. The development of modern society requires the maximum use of fossil fuels, but produces harmful greenhouse gases such as CO2 and CO [3, 4]. Greenhouse gases such as sulfur dioxide, nitrogen dioxide, and carbon dioxide are the main causes of global climate change contributed by several countries, namely China, the United States and the United Kingdom [5, 6]. The long-term impact of greenhouse gas accumulation will cause huge economic losses and pose a global threat to food security and nutrition [7]. High electricity consumption is also a Vol.. No..Hal..-... 2018 | 1 Margin: Atas 3cm dan bawah 2 cm contributor to higher carbon emissions [8]. Carbon emissions were 36.3 giga tons (Gt) which increased by 6% in 2020 and 40.8 Gt CO2 equivalent (CO2eq) was the total carbon emissions in 2021 [9]. From 2001 to 2018, the cumulative carbon emissions of China's transportation industry increased by 633.46 million tons, of which the capital input effect was the main factor driving carbon emissions, accounting for 157.70% of the total cumulative emissions increase, followed by the energy structure effect of 10.39% [10–12]. Steel companies make a large contribution to annual CO2 emissions, making the industry one of the main contributors to climate change, with its annual carbon dioxide emissions accounting for about 5% of the world's total emissions [13]. The current impacts of climate change have created a worldwide consensus on the need for sustainable development [14]. The energy industry plays an important role due to its high contribution to greenhouse gas (GHG) emissions as part of its high dependence on fossil fuels, requiring immediate action to ensure long-term planning focused on decarbonization [15]. Decarbonization of the energy system is essential to address climate change [16]. Decarbonization requires rapid and significant supply-side industrial transitions on a large scale, both to build new systems and retire existing ones [17]. Decarbonizing the global energy supply will be much more difficult and will take much longer [18]. Several CO2 capture techniques have been delivered to date, including metalorganic frameworks, carbon nanotubes, activated carbon, and zeolites, as well as biological mitigation using photoautotrophic microalgae [19, 20]. Microalgae can be used as a way to capture Margin: Kanan dan kiri 2,5 cm carbon gas as a step in decarbonization [21, 22]. Microalgae are utilized in carbon fixation because microalgae can actively absorb CO2 from flue gas for photosynthesis and microalgae reproduction [23]. Using light and organic carbon as energy sources, as well as CO2 and organic carbon as carbon sources can increase the opportunity for microalgae cultivation to absorb carbon gas in the air [24, 25]. There are several challenges faced in microalgae cultivation given the different characteristics of various waste streams such as origin, pretreatment process, and nutrient content resulting in uncontrollable variables in microalgae biomass propagation [26, 27]. In some energyintensive activities such as the transportation sector, there is currently no alternative to fossil fuels. Therefore, finding efficient renewable energy sources is one of the issues of concern in today's energy supply [28, 29]. Fossil energy sources remain a major necessity in meeting current energy demands. However, renewable energy such as biodiesel is gaining attention to reduce dependence on fossil energy sources that contribute to increased global carbon emissions [30, 31]. Microalgae have been established as a potential feedstock for the production of biofuels that are renewable and also environmentally friendly [32]. Microalgae offer promising potential in bioenergy production and CO2 mitigation. Advantages of microalgae include high photosynthetic efficiency and fast growth rate, ability to utilize wastewater as a nutrient source, can grow on infertile land, and can use CO2 from exhaust gases [33, 34]. Vol.. No..Hal..-... 2018 | 2 Margin: Atas 3cm dan bawah 2 cm 2. Materials and Methods 2.1 Systematic Search and Selection of Literature The method includes a structured and comprehensive search process for scientific information on the topics of decarbonization using microalgae and conversion of microalgal biomass to biofuels. The method includes keyword identification, database selection, and literature screening. 2.2 Secondary Data Analysis The method involves evaluating data that have been generated by previous studies, including experiments and other research in the field of decarbonization using microalgae and conversion of microalgal biomass to biofuels, including data compilation and organization and data analysis. 2.3 Efficiency and Sustainability Analysis The method involves evaluating the extent to which decarbonization technologies using microalgae and the utilization of microalgal biomass into biofuels are efficient and sustainable in reducing carbon emissions. 2.4 Synthesis of Findings and Recommendations The authors summarized the main findings of the evaluated research and provided recommendations related to the development and implementation of decarbonization technologies using microalgae and biofuel production from microalgal biomass. 3. Results and Discussion 3.1 Potential of Microalgae in the Decarbonization Process Decarbonization Process Microalgae is one of the biotechnology approaches to mitigate CO2 Margin: Kanan dan kiri 2,5 cm and about 2,000,000 species are beneficial in CO2 sequestration. CO2 fixation through photoautotrophic algae culture has the capacity to reduce atmospheric CO2. To produce 100 tons of biomass, approximately microalgae fix 183 tons of CO2 [35, 36]. Microalgae are photosynthetic organisms that are beneficial in CO2 fixation and O2 release to the environment. Cyanobacterium, which is a sucrose producer, shows high levels of biomass production, as well as increased photosystem activity, carbon fixation [37, 38]. lobal warming caused by carbon emissions can increase the opportunity for microalgae to fix CO2 due to their rapid growth rate [39]. Flue gas from fossil fuel combustion accounts for more than 7% of total CO2 emissions in the world, which is very suitable in cultivating microalgae. The CO2 biological fixation efficiency is Synechococcus nidulans with 10% CO2 [40]. With its ability to fix CO2 by utilizing sunlight as an energy source, microalgae is an efficient biofactor to produce various biocomponents and biological products [41]. 3.2 Carbon Emission Reduction with Microalgae Direct carbon sequestration is the most promising way to reduce CO2 emissions due to its ability to capture CO2 directly at the source before it is emitted into the atmosphere. An important part of the process is biological carbon sequestration using chemoorganotrophic microbes that utilize CO2 as an energy source. Microalgae, with higher photosynthetic efficiency than terrestrial plants and their role in biofuels, are promising candidates for use as carbon sinks [42, 43]. Moreover, if conventional processes can be combined with microalgae Vol.. No..Hal..-... 2018 | 3 Margin: Atas 3cm dan bawah 2 cm using industrial flue gas under the BECCS concept, microalgae could become even more promising by completing the cyclical process as an efficient CO2 capture agent and potential feedstock for bioenergy. Microalgae can provide bioenergy in gaseous, liquid, and solid-phase forms, also producing high-value bio-products [33, 44]. Recent developments in the field of biological biology in the area of carbon capture through microalgae for its utilization towards biodiesel generation highlight the importance of certain key parameters such as efficient strain selection, microalgae metabolism, cultivation systems (open and closed) and biomass production along with national and international biodiesel specifications and properties [45, 46]. CO2 capture can be applied to large sources of point sources [47]. Microalgae are the most important microorganisms in aquatic ecosystems for the global carbon budget, playing an important role in CO2 fixation. Through photosynthesis, several carbon assimilation pathways are involved in biotransformation into a wide range of chemicals as bulk products [48, 49]. 3.3 Role of Microalgae in Carbon Sequestration The growth rate of algae can be calculated using the equation: 𝑑𝑋 = 𝜇𝑋 − 𝑘𝑑 𝑋 𝑑𝑡 Equation 1. Algae growth calculation equation [50]. where X is the biomass concentration, μ is the specific growth rate and kd is the decay coefficient. Some parameters that significantly affect the specific growth rate of microalgae include nutrient concentration, light intensity, temperature, and pH value [50]. Margin: Kanan dan kiri 2,5 cm Microalgae have an advantage in carbon fixation because microalgae do not have a vascular system to transport nutrients, but rather microalgae have photoautotrophic behavior, which can utilize dissolved nitrogen (N), phosphorus (P), and organic carbon (OC) directly [51, 52]. Microalgae can be found almost anywhere including in freshwater and seawater, so native microalgae can be used for cultivation to avoid biosafety issues [53]. Microalgae can capture CO2 and convert it into O2 and biomass through photolysis. Microalgae CO2 fixation and biomass production are highly dependent on the environmental conditions of cultivation. Factors that can influence include microalgae species, CO2 concentration, toxic compounds present in flue gas, luminosity, and inoculum concentration [54, 55]. 3.4 Utilization of Microalgae in Biofuel Production Microalgae biomass generation and processing options that play an important role in the establishment of a viable biodiesel production plant viable biodiesel production plant will be investigated in detail [56, 57]. There are three most common methods used for microalgae mass production: open ponds, closed photobioreactors, and hybrid systems. There are some popular techniques to harvest microalgae are flocculation, centrifugation, filtration, ultrafiltration, air flotation, automated flotation, and electrophoresis [58, 59]. Heterogeneous catalysis has been considered as the main choice for biodiesel knowledge in the near future. Currently, heterogeneous catalysts have been used for biodiesel production from non-edible oils and received global interest due to their Vol.. No..Hal..-... 2018 | 4 Margin: Atas 3cm dan bawah 2 cm outstanding performance [60, 61]. In some cases, when biofuel production biofuel production is scaled up. Microalgae perform photosynthesis like plants, converting captured solar energy into chemical energy through CO2 fixation [62, 63]. During the growth of microalgae in wastewater, microalgae produce biomass containing lipids, carbohydrates, and other compounds that can be used for biofuel production. In addition, the treated water can be used in agriculture for irrigation [64]. 3.5 Challenges in Utilizing Microalgae for Decarbonization and Biofuel Production Some of the challenges include low biomass productivity, harvesting of algal biomass, high energy consumption, and high production costs [65]. Harvesting microalgae is an energy-intensive process and leads to increased production costs. To overcome this major challenge, flue gas and wastewater have been used for microalgae cultivation, which reduces the cost of nutrients and carbon sources, but the operational cost is high [64]. However, commercial production of microalgal biofuels is still a major obstacle due to the high cost of microalgae cultivation and biomass harvesting [66]. nother challenge is that available systems still produce low yields and efficiencies [67]. The photosynthesis process of microalgae can be hampered if the wastewater used in nutrient delivery is colored and increases the chance of organic matter contamination in the wastewater [56]. 3.6 Future Opportunities for Microalgae Use in Decarbonization Efforts In order to achieve full electrification of the end-user sector, improvements and new solutions for the power grid are required. In general, two approaches at Margin: Kanan dan kiri 2,5 cm different scales can be identified, namely, microgrids and large interconnections. Microgrids are distinct, locally controlled, wired miniaturized energy systems that operate in parallel with or isolated from the main power grid to ensure reliable, affordable and secure energy [36]. Among the various technologies evolving to harness solar energy, concentrated solar power systems use lenses or mirrors and tracking systems to focus large areas of sunlight into small, concentrated beams. This technology mainly consists of parabolic troughs and concentrating Fresnel linear reflectors, parabolas, solar power towers, double-reflecting solar furnaces, and solar simulators [38]. Development, and the low-carbon transition reveal the interrelationship between decarbonization, LCD, and LCT which can be used interchangeably in the literature to describe the process towards zero-zero carbon emissions [39]. Raising awareness of the key role of geoscience in achieving decarbonization and engaging communities with field-scale projects field-scale projects for various subsurface technologies, including CCS and geothermal heating schemes [68]. 4. Conclusion Carbon dioxide (CO2) is a major contributor to global climate change. Greenhouse gas emissions from human activities, especially the use of fossil fuels, exacerbate this problem. The energy industry is one of the major contributors to CO2 emissions. Therefore, decarbonization of the energy system is crucial to address climate change. Microalgae have great potential in decarbonization. They can absorb CO2 effectively through photosynthesis, even Vol.. No..Hal..-... 2018 | 5 Margin: Atas 3cm dan bawah 2 cm more efficiently than terrestrial plants. Utilizing microalgae in biofuel production is also a promising solution to reduce dependence on fossil energy sources. However, there are a number of challenges that need to be overcome. Microalgae biomass productivity still needs to be increased, and the harvesting process requires high energy. Production and operational costs are also major constraints to the commercial production of biofuels from microalgae. For the future, there is a great opportunity to increase the use of microalgae in decarbonization efforts. Innovations in renewable energy technologies and resource management, as well as a better understanding of microalgae physiology, will be key in meeting this challenge. With the right approach, microalgae can play an important role in achieving decarbonization goals and reducing the impact of global climate change. Acknowledgments The author would like to express his sincere gratitude to all those who have contributed in completing the journal review. Grateful thanks to the family, supervisors, and colleagues who helped and contributed, supported, and guided. Their valuable inputs significantly enriched the quality and depth of the journal review. [2] Anser, M. K., Alharthi, M., Aziz, B., & Wasim, S. (2020). Impact of Urbanization, Economic Growth, and Population Size on Residential Carbon Emissions in the SAARC Countries. Clean Technologies and Environmental Policy, 22(4), 923– 936. doi: 10.1007/s10098-02001833-y [3] Hota, P., Das, A., & Maiti, D. K. (2023). A Short Review on Generation of Green Fuel Hydrogen Through Water Splitting. International Journal of Hydrogen Energy, 48(2), 523–541. doi: 10.1016/J.IJHYDENE.2022.09.264 [4] Awodumi, O. B., & Adewuyi, A. O. (2020). The Role of Non-Renewable Energy Consumption in Economic Growth and Carbon Emission: Evidence from Oil Producing Economies in Africa. Energy Strategy Reviews, 27, 100434. doi: 10.1016/j.esr.2019.100434 [5] Khan, Z., Ali, M., Kirikkaleli, D., Wahab, S., & Jiao, Z. (2020). The Impact of Technological Innovation and Public-Private Partnership Investment on Sustainable Environment in China: Consumption-Based Carbon Emissions Analysis. Sustainable Development, 28(5), 1317–1330. doi: 10.1002/sd.2086 [6] Yin, K., Liu, L., & Gu, H. (2022). Green Paradox or Forced Emission Reduction - The Dual Effects of Environmental Regulation on Carbon Emissions. International Journal of Environmental Research and Public Health, 19(17). doi: 10.3390/ijerph191711058 [7] Wang, X., & Hong, Y. (2022). Microalgae Biofilm and Bacteria Symbiosis in Nutrient Removal and Carbon Fixation from Wastewater: A Review. Current Pollution Reports, References [1] Abeydeera, L. H. U. W., Mesthrige, J. W., & Samarasinghalage, T. I. (2019). Global Research on Carbon Emissions: A Scientometric Review. Environmental Impact Assessment Review, 11(14), 1–24. doi: doi:10.3390/su11143972 Margin: Kanan dan kiri 2,5 cm Vol.. No..Hal..-... 2018 | 6 Margin: Atas 3cm dan bawah 2 cm 8(2), 128–146. doi: 10.1007/s40726022-00214-x [8] [9] Kirikkaleli, D., Güngör, H., & Adebayo, T. S. (2022). Consumption-Based Carbon Emissions, Renewable Energy Consumption, Financial Development and Economic Growth in Chile. Business Strategy and the Environment, 31(3), 1123–1137. doi: 10.1002/bse.2945 Izzati, F., Ababil, P. F., & Abror, H. (2023). Carbon Capture Utilization (CCU) sebagai Generator Energi Listrik menggunakan Allam Cycle sebagai Upaya Dekarbonisasi Industri Migas. Journal of Sustainable Energy, 1(1), 1–10. [10] Liu, M., Zhang, X., Zhang, M., Feng, Y., Liu, Y., Wen, J., & Liu, L. (2021). Influencing Factors of Carbon Emissions in Transportation Industry Based on C–D Function and LMDI Decomposition Model: China as an Example. Environmental Impact Assessment Review, 90(July 2020), 106623. doi: 10.1016/j.eiar.2021.106623 [11] Lu, M., & Lai, J. (2020). Review on Carbon Emissions of Commercial Buildings. Renewable and Sustainable Energy Reviews, 119(October 2019), 109545. doi: 10.1016/j.rser.2019.109545 [12] Sun, L., Qin, L., Taghizadeh-Hesary, F., Zhang, J., Mohsin, M., & Chaudhry, I. S. (2020). Analyzing Carbon Emission Transfer Network Structure Among Provinces in China: New Evidence from Social Network Analysis. Environmental Science and Pollution Research, 27(18), 23281–23300. doi: 10.1007/s11356-020-08911-0 [13] Zhang, X., Jiao, K., Zhang, J., & Guo, Z. (2021). A Review on Low Carbon Emissions Projects of Steel Margin: Kanan dan kiri 2,5 cm Industry in the World. Journal of Cleaner Production, 306, 127259. doi: 10.1016/j.jclepro.2021.127259 [14] Plazas-Niño, F. A., Ortiz-Pimiento, N. R., & Montes-Páez, E. G. (2022). National Energy System Optimization Modelling for Decarbonization Pathways Analysis: A Systematic Literature Review. Renewable and Sustainable Energy Reviews, 162(March). doi: 10.1016/j.rser.2022.112406 [15] Smil, V. (2019). What We need to Know About the Pace of Decarbonization. Substantia, 3(2), 69–73. doi: 10.13128/Substantia-700 [16] Grubert, E., & Hastings-Simon, S. (2022). Designing the MidTransition: A Review of MediumTerm Challenges for Coordinated Decarbonization in the United States. Wiley Interdisciplinary Reviews: Climate Change, 13(3), 1–19. doi: 10.1002/wcc.768 [17] Papadis, E., & Tsatsaronis, G. (2020). Challenges in the Decarbonization of the Energy Sector. Energy, 205, 118025. doi: 10.1016/j.energy.2020.118025 [18] Lilliestam, J., Patt, A., & Bersalli, G. (2021). The Effect of Carbon Pricing on Technological Change for Full Energy Decarbonization: A Review of Empirical Ex-Post Evidence. Wiley Interdisciplinary Reviews: Climate Change, 12(1), 1–21. doi: 10.1002/wcc.681 [19] Priyadharsini, P., Nirmala, N., Dawn, S. S., Baskaran, A., SundarRajan, P., Gopinath, K. P., & Arun, J. (2022). Genetic Improvement of Microalgae for Enhanced Carbon Dioxide Sequestration and Enriched Biomass Productivity: Review on CO2 BioFixation Pathways Modifications. Algal Research, 66(April), 102810. Vol.. No..Hal..-... 2018 | 7 Margin: Atas 3cm dan bawah 2 cm doi: 10.1016/j.algal.2022.102810 [20] Prayitno, J., Admirasari, R., Sudinda, T. W., & Winanti, W. S. (2021). Teknologi Penangkapan Karbon Dengan Mikroalga : Peluang Dan Tantangan Dalam Mitigasi Perubahan Iklim. Pusat Teknologi Lingkungan, OR PPT Badan Riset dan Inovasi Nasional, 14(2), 91–100. [21] Ashokkumar, V., Chen, W. H., Kamyab, H., Kumar, G., AlMuhtaseb, A. H., & Ngamcharussrivichai, C. (2019). Cultivation of Microalgae Chlorella sp. in Municipal Sewage for Biofuel Production and Utilization of Biochar Derived from Residue for the Conversion of Hematite Iron Ore (Fe2O3) to Iron (Fe) – Integrated Algal Biorefinery. Energy, 189, 116128. doi: 10.1016/j.energy.2019.116128 [22] Chauhan, D. S., Goswami, G., Dineshbabu, G., Palabhanvi, B., & Das, D. (2020). Evaluation and Optimization of Feedstock Quality for Direct Conversion of Microalga Chlorella sp. FC2 IITG into Biodiesel via Supercritical Methanol Transesterification. Biomass Conversion and Biorefinery, 10(2), 339–349. doi: 10.1007/s13399-01900432-2 [23] Iglina, T., Iglin, P., & Pashchenko, D. (2022). Industrial CO2 Capture by Algae: A Review and Recent Advances. Sustainability (Switzerland), 14(7). doi: 10.3390/su14073801 [24] Vale, M. A., Ferreira, A., Pires, J. C. M., & Gonçalves, G. A. L. (2020). CO2 Capture Using Microalgae. Advances in Carbon Capture: Methods, Technologies and Applications, 381–405. doi: 10.1016/B978-0-12-8196571.00017-7 Margin: Kanan dan kiri 2,5 cm [25] Ghisolfi, V., Tavasszy, L. A., Correia, G. H. de A., Chaves, G. de L. D., & Ribeiro, G. M. (2022). Freight Transport Decarbonization: A Systematic Literature Review of System Dynamics Models. Sustainability (Switzerland), 14(6). doi: 10.3390/su14063625 [26] Hoang, A. T., Sirohi, R., Pandey, A., Nižetić, S., Lam, S. S., Chen, W. H., … Pham, V. V. (2022). Biofuel Production from Microalgae: Challenges and Chances. Phytochemistry Reviews (Vol. 0123456789). doi: 10.1007/s11101022-09819-y [27] Griffiths, S., Sovacool, B. K., Kim, J., Bazilian, M., & Uratani, J. M. (2021). Industrial Decarbonization via Hydrogen: A Critical and Systematic Review of Developments, Socio-Technical Systems and Policy Options. Energy Research and Social Science, 80(May), 102208. doi: 10.1016/j.erss.2021.102208 [28] Azarpour, A., Zendehboudi, S., Mohammadzadeh, O., Rajabzadeh, A. R., & Chatzis, I. (2022). A Review on Microalgal Biomass and Biodiesel Production Through CoCultivation Strategy. Energy Conversion and Management, 267(May), 115757. doi: 10.1016/j.enconman.2022.115757 [29] Figueroa‑Torres, G. M., Pittman, J. K., & Theodoropoulos, C. (2021). Optimisation of Microalgal Cultivation via Nutrient‑Enhanced Strategies: The Biorefnery Paradigm. Biotechnology for Biofuels, 14(64), 1–16. doi: https://doi.org/10.1186/s13068-02101912-2 [30] Edo, R., Vinata, Y., & Wulandari, Y. (2020). Pembuatan Biodiesel dari Mikroalga Nannochloropsis sp. Vol.. No..Hal..-... 2018 | 8 Margin: Atas 3cm dan bawah 2 cm Menggunakan Metode Transesterifikasi Insitu dengan Bantuan Katalis Asam Sulfat. Seminar Nasional Sains dan Teknologi Terapan, 7(1), 507–514. Retrieved from https://ejurnal.itats.ac.id/sntekpan/ar ticle/view/1280 [31] Yao, S., Lyu, S., An, Y., Lu, J., Gjermansen, C., & Schramm, A. (2019). Microalgae–Bacteria Symbiosis in Microalgal Growth and Biofuel Production: A Review. Journal of Applied Microbiology, 126(2), 359–368. doi: 10.1111/jam.14095 [32] Kumar, L., & Bharadvaja, N. (2020). A Review on Microalgae Biofuel and Biorefinery: Challenges and Way Forward. Energy Sources, Part A: Recovery, Utilization and Environmental Effects, 00(00), 1–24. doi: 10.1080/15567036.2020.1836084 [33] Choi, Y. Y., Patel, A. K., Hong, M. E., Chang, W. S., & Sim, S. J. (2019). Microalgae Bioenergy with Carbon Capture and Storage (BECCS): An Emerging Sustainable Bioprocess for Reduced CO2 Emission and Biofuel Production. Bioresource Technology Reports, 7(March), 100270. doi: 10.1016/j.biteb.2019.100270 [34] Dębowski, M., Zieliński, M., Kazimierowicz, J., Kujawska, N., & Talbierz, S. (2020). Microalgae Cultivation Technologies as an Opportunity for Bioenergetic System Development—Advantages and Limitations. Sustainability (Switzerland), 12(23), 1–37. doi: 10.3390/su12239980 [35] Amenorfenyo, D. K., Huang, X., Zhang, Y., Zeng, Q., Zhang, N., Ren, J., & Huang, Q. (2019). Microalgae Brewery Wastewater Treatment: Potentials, Benefits and the Margin: Kanan dan kiri 2,5 cm Challenges. International Journal of Environmental Research and Public Health, 16(11). doi: 10.3390/ijerph16111910 [36] Bompard, E., Grosso, D., Huang, T., Profumo, F., Lei, X., & Li, D. (2018). World Decarbonization Through Global Electricity Interconnections. Energies, 11(7), 1–29. doi: 10.3390/en11071746 [37] Simas-Rodrigues, C., Villela, H. D. M., Martins, A. P., Marques, L. G., Colepicolo, P., & Tonon, A. P. (2015). Microalgae for Economic Applications: Advantages and Perspectives for Bioethanol. Journal of Experimental Botany, 66(14), 4097–4108. doi: 10.1093/jxb/erv130 [38] Chuayboon, S., & Abanades, S. (2020). An Overview of Solar Decarbonization Processes, Reacting Oxide Materials, and Thermochemical Reactors for Hydrogen and Syngas Production. International Journal of Hydrogen Energy, 45(48), 25783–25810. doi: 10.1016/j.ijhydene.2020.04.098 [39] Wimbadi, R. W., & Djalante, R. (2020). From Decarbonization to Low Carbon Development and Transition: A Systematic Literature Review of the Conceptualization of Moving Toward Net-Zero Carbon Dioxide Emission (1995–2019). Journal of Cleaner Production, 256, 120307. doi: 10.1016/j.jclepro.2020.120307 [40] Ma, X., Gao, M., Gao, Z., Wang, J., Zhang, M., Ma, Y., & Wang, Q. (2018). Past, Current, and Future Research on Microalga-Derived Biodiesel: A Critical Review and Bibliometric Analysis. Environmental Science and Pollution Research, 25(11), 10596– 10610. doi: 10.1007/s11356-0181453-0 Vol.. No..Hal..-... 2018 | 9 Margin: Atas 3cm dan bawah 2 cm [41] Ubando, A. T., Africa, A. D. M., Maniquiz-Redillas, M. C., Culaba, A. B., Chen, W. H., & Chang, J. S. (2021). Microalgal Biosorption of Heavy Metals: A Comprehensive Bibliometric Review. Journal of Hazardous Materials, 402(July 2020), 123431. doi: 10.1016/j.jhazmat.2020.123431 [42] Cheah, W. Y., Ling, T. C., Juan, J. C., Lee, D. J., Chang, J. S., & Show, P. L. (2016). Biorefineries of Carbon Dioxide: From Carbon Capture and Storage (CCS) to Bioenergies Production. Bioresource Technology, 215, 346–356. doi: 10.1016/j.biortech.2016.04.019 [43] Singh, J., & Dhar, D. W. (2019). Overview of Carbon Capture Technology: Microalgal Biorefinery Concept and State-of-the-Art. Frontiers in Marine Science, 6(FEB), 1–9. doi: 10.3389/fmars.2019.00029 [44] Thomas, D. M., Mechery, J., & Paulose, S. V. (2016). Carbon Dioxide Capture Strategies from Flue Gas Using Microalgae: A Review. Environmental Science and Pollution Research, 23(17), 16926– 16940. doi: 10.1007/s11356-0167158-3 [45] Mondal, M., Goswami, S., Ghosh, A., Oinam, G., Tiwari, O. N., Das, P., … Halder, G. N. (2017). Production of Biodiesel from Microalgae Through Biological Carbon Capture: A Review. 3 Biotech, 7(2), 1–21. doi: 10.1007/s13205-017-0727-4 [46] Varanasi, J. L., Prasad, S., Singh, H., & Das, D. (2020). Improvement of Bioelectricity Generation and Microalgal Productivity with Concomitant Wastewater Treatment in Flat-Plate Microbial Carbon Capture Cell. Fuel, 263(October), 116696. doi: Margin: Kanan dan kiri 2,5 cm 10.1016/j.fuel.2019.116696 [47] Rinanti, A. (2016). Biotechnology Carbon Capture and Storage by Microalgae to Enhance CO2 Removal Efficiency in ClosedSystem Photobioreactor. Algae Organisms for Imminent Biotechnology. doi: 10.5772/62915 [48] Severo, I. A., Deprá, M. C., Zepka, L. Q., & Jacob-Lopes, E. (2019). Carbon Dioxide Capture and Use by Microalgae in Photobioreactors. Bioenergy with Carbon Capture and Storage: Using Natural Resources for Sustainable Development, 151– 171. doi: 10.1016/B978-0-12816229-3.00008-9 [49] Yue, D., Gong, J., & You, F. (2015). Synergies Between Geological Sequestration and Microalgae Biofixation for Greenhouse Gas Abatement: Life Cycle Design of Carbon Capture, Utilization, and Storage Supply Chains. ACS Sustainable Chemistry and Engineering, 3(5), 841–861. doi: 10.1021/sc5008253 [50] Kasiri, S., Ulrich, A., & Prasad, V. (2015). Kinetic Modeling and Optimization of Carbon Dioxide Fixation Using Microalgae Cultivated in Oil-Sands Process Water. Chemical Engineering Science, 137, 697–711. doi: 10.1016/j.ces.2015.07.004 [51] Maheshwari, N., Krishna, P. K., Thakur, I. S., & Srivastava, S. (2020). Biological Fixation of Carbon Dioxide and Biodiesel Production Using Microalgae Isolated from Sewage Waste Water. Environmental Science and Pollution Research, 27(22), 27319– 27329. doi: 10.1007/s11356-01905928-y [52] Prayitno, J., Rahmasari, I. I., & Rifai, A. (2020). Pengaruh Interval Waktu Vol.. No..Hal..-... 2018 | 10 Margin: Atas 3cm dan bawah 2 cm Panen terhadap Produksi Biomassa Chlorella sp. dan Melosira sp. untuk Penangkapan Karbon secara Biologi. Jurnal Teknologi Lingkungan, 21(1), 23–30. doi: 10.29122/jtl.v21i1.3777 [53] Kong, W., Shen, B., Lyu, H., Kong, J., Ma, J., Wang, Z., & Feng, S. (2021). Review on Carbon Dioxide Fixation Coupled with Nutrients Removal from Wastewater by Microalgae. Journal of Cleaner Production, 292, 125975. doi: 10.1016/j.jclepro.2021.125975 [54] Moraes, L., da Rosa, G. M., Cardias, B. B., dos Santos, L. O., & Costa, J. A. V. (2016). Microalgal Biotechnology for Greenhouse Gas Control: Carbon Dioxide Fixation by Spirulina sp. at Different Diffusers. Ecological Engineering, 91, 426– 431. doi: 10.1016/j.ecoleng.2016.02.035 [55] Morales, M., Sánchez, L., & Revah, S. (2018). The Impact of Environmental Factors on Carbon Dioxide Fixation by Microalgae. FEMS Microbiology Letters, 365(3), 1–11. doi: 10.1093/femsle/fnx262 [56] Dickinson, S., Mientus, M., Frey, D., Amini-Hajibashi, A., Ozturk, S., Shaikh, F., … El-Halwagi, M. M. (2017). A Review of Biodiesel Production from Microalgae. Clean Technologies and Environmental Policy, 19(3), 637–668. doi: 10.1007/s10098-016-1309-6 [57] Peng, L., Fu, D., Chu, H., Wang, Z., & Qi, H. (2020). Biofuel Production from Microalgae: A Review. Environmental Chemistry Letters, 18(2), 285–297. doi: 10.1007/s10311-019-00939-0 [58] Faried, M., Samer, M., Abdelsalam, E., Yousef, R. S., Attia, Y. A., & Ali, A. S. (2017). Biodiesel Production from Microalgae: Processes, Technologies and Recent Margin: Kanan dan kiri 2,5 cm Advancements. Renewable and Sustainable Energy Reviews, 79(February), 893–913. doi: 10.1016/j.rser.2017.05.199 [59] Rahul S, M., Sundaramahalingam, M. A., Shivamthi, C. S., Shyam Kumar, R., Varalakshmi, P., Karthikumar, S., … Pugazhendhi, A. (2021). Insights about Sustainable Biodiesel Production from Microalgae Biomass: A Review. International Journal of Energy Research, 45(12), 17028–17056. doi: 10.1002/er.6138 [60] Faruque, M. O., Razzak, S. A., & Hossain, M. M. (2020). Application of Heterogeneous Catalysts for Biodiesel Production from Microalgal Oil—A Review. Catalysts, 10(9), 1–25. doi: 10.3390/catal10091025 [61] Sun, C. H., Fu, Q., Liao, Q., Xia, A., Huang, Y., Zhu, X., … Chang, H. X. (2019). Life-Cycle Assessment of Biofuel Production from Microalgae via Various Bioenergy Conversion Systems. Energy, 171, 1033–1045. doi: 10.1016/j.energy.2019.01.074 [62] Hallenbeck, P. C., Grogger, M., Mraz, M., & Veverka, D. (2016). Solar Biofuels Production with Microalgae. Applied Energy, 179, 136–145. doi: 10.1016/j.apenergy.2016.06.024 [63] Suparmaniam, U., Lam, M. K., Uemura, Y., Lim, J. W., Lee, K. T., & Shuit, S. H. (2019). Insights Into the Microalgae Cultivation Technology and Harvesting Process for Biofuel Production: A Review. Renewable and Sustainable Energy Reviews, 115(January), 109361. doi: 10.1016/j.rser.2019.109361 [64] Mehariya, S., Goswami, R. K., Verma, P., Lavecchia, R., & Zuorro, A. (2021). Integrated Approach for Wastewater Treatment and Biofuel Vol.. No..Hal..-... 2018 | 11 Margin: Atas 3cm dan bawah 2 cm Production in Microalgae Biorefineries. Energies, 14(8). doi: 10.3390/en14082282 [65] Daneshvar, E., Wicker, R. J., Show, P. L., & Bhatnagar, A. (2022). Biologically-Mediated Carbon Capture and Utilization by Microalgae Towards Sustainable CO2 Biofixation and Biomass Valorization – A Review. Chemical Engineering Journal, 427(May 2021), 130884. doi: 10.1016/j.cej.2021.130884 [66] Li, S., Li, X., & Ho, S. H. (2022). How to Enhance Carbon Capture by Evolution of Microalgal Photosynthesis? Separation and Purification Technology, 291(February), 120951. doi: 10.1016/j.seppur.2022.120951 Margin: Kanan dan kiri 2,5 cm Zharmukhamedov, S. K., Nam, H. G., … Allakhverdiev, S. I. (2017). Biofuel Production: Challenges and Opportunities. International Journal of Hydrogen Energy, 42(12), 8450– 8461. doi: 10.1016/j.ijhydene.2016.11.125 [68] Stephenson, M. H., Ringrose, P., Geiger, S., Bridden, M., & Schofield, D. (2019). Geoscience and Decarbonization: Current Status and Future Directions. Petroleum Geoscience, 25(4), 501–508. doi: 10.1144/petgeo2019-084 [67] Rodionova, M. V., Poudyal, R. S., Tiwari, I., Voloshin, R. A., Vol.. No..Hal..-... 2018 | 12