Techno-economic assessment of solar thermal and alternative energy integration in supercritical water gasification of microalgae

Onigbajumo, Adetunji; Taghipour, Alireza; Ramirez, Jerome A.; Will, Geoffrey; Ong, Teng‐Cheong; Couperthwaite, Sara J.; Steinberg, Ted; Rainey, Thomas J.

doi:10.1016/j.enconman.2020.113807

Cited by 28 publications

(3 citation statements)

References 57 publications

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“…Meanwhile, based on the supply chain, biomass-based energy can reduce the CO2 emissions [4], even from the Life Cycle Assessment (LCA), which shows the negative CO2 emissions [5]. Some researchers have investigated to find renewable energy sources with low CO2 emissions [6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Growth rate measurements of Chlorella vulgaris in a photobioreactor by Neubauer-improved counting chamber and densitometer

Ma’mun

Wahyudi

Raghdanesa

2022

IOP Conf. Ser.: Earth Environ. Sci.

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The depletion of fossil fuel sources and increased CO2 emissions has triggered intensive research to discover renewable energy sources. With the Low Carbon Scenario, the role of renewable energy will increase to 58% in 2050. As a renewable energy source, bioethanol is environmentally friendly which can substitute gasoline. Currently, the third-generation bioethanol production technology from microalgae is still being developed. Chlorella vulgaris is one of the microalgae types with high carbohydrate content and is easy and fast to cultivate. This study aims to evaluate the growth rate of C. vulgaris cultivated in a bubble column photobioreactor using artificial seawater aerated with pure CO2. Two LED tube lights were used with 12 h light and 12 dark cycles for 12 - 13 days. Microalgae culture population was measured every 24 h using a Neubauer-improved counting chamber and a microscope equipped with a digital camera. The results showed that the maximum specific growth rate,/max, was found to be 0.344 d1, and the highest concentration of 1.88 x107 cells mL1 occurred on day 7. Moreover, the microalgae populations were also measured using a densitometer. Since the calculation of the cell population used secondary data from the literature, the results were less accurate than those of the counting chamber.

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Section: Introductionmentioning

confidence: 99%

Growth rate measurements of Chlorella vulgaris in a photobioreactor by Neubauer-improved counting chamber and densitometer

Ma’mun

Wahyudi

Raghdanesa

2022

IOP Conf. Ser.: Earth Environ. Sci.

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show abstract

“…Meanwhile, biomass-based energy can reduce CO2 emissions based on the supply chain (Röder et al, 2019), even when the Life Cycle Assessment (LCA) shows negative CO2 emissions (Dasan et al, 2019). Some researchers have investigated renewable energy sources that emit less CO2 (Chang et al, 2020;Ishaq & Dincer, 2020;Koc et al, 2020;Ong & Wu, 2020;Zhao & Su, 2020;Chaparro-Garnica et al, 2021;Onigbajumo et al, 2021;Zhao et al, 2021). Bioethanol, a renewable energy, has promising prospects to reduce dependence on gasoline.…”

Section: Introductionmentioning

confidence: 99%

Bioethanol Production from Spirulina (Arthrospira platensis) by Microwave-Assisted Acid Hydrolysis Pretreatment

Ma'mun,

Prasetio,

Anugrah

2024

JBAT

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The world's high consumption of fossil energy increases carbon dioxide (CO2) emissions. The depletion of fossil fuel sources, combined with rising CO2 emissions, has prompted intensive research into renewable energy sources. Bioethanol is an environmentally friendly energy source that has the potential to reduce reliance on gasoline. Bioethanol is produced through the fermentation of monosaccharides. The first and second generations of bioethanol are derived, respectively, from food crops, agricultural waste, and plantations, while the third generation is derived from algae. However, the third generation bioethanol research is still being conducted intensively to develop an optimal process. Macro/microalgae are low-level plants that have the potential to become raw materials for bioethanol. Arthrospira platensis, a spirulina species, is a microalgae with a high carbohydrate content. Apart from that, this type of microalgae is easy to cultivate and grow. This research aims to determine the reducing sugar content which are monosaccharides produced from acid hydrolysis using a microwave at a temperature of 100 °C for 60 – 120 minutes with 0.2 M H2SO4 as the solvent. The hydrolysate obtained was then fermented anaerobically with Saccharomyces cerevisiae in a shaking water bath. The High Performance Liquid Chromatography (HPLC) test was carried out to identify the reducing sugar groups in the hydrolysate. Moreover, the solid content of the biochar remaining from the hydrolysis process was analyzed using Fourier-Transform Infrared Spectrometer (FTIR). From the test results, it was found that the highest concentration of D-glucose (1.19 g/L) occurred at 90 minutes of the hydrolysis. In addition, the hydrolysis of microalgae was also carried out with 0.3 M H2SO4 solvent for 90 minutes. The hydrolysate was then fermented for 96 hours. From the distillation process, it was obtained a bioethanol yield of 2.89%.

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“…Rodat et al also considered applying CSTGB system to convert natural gas to H2 with the yield of 436 kg/day and the cost of 1.42$/kg[164]. Onigbajumo et al used Aspen Plus model to simulate the CSTGB system using algae as a feedstock[165]. The result of the techno-economic analysis showed minimum fuel selling price (MFSP) of 40-56 $/GJ, effectively reducing the MFSP by 77% compared to the conventional gasifier.…”

mentioning

confidence: 99%

Concentrated solar thermochemical gasification of biomass: Principles, applications, and development

Fang

Paul

Varjani

et al. 2021

Renewable and Sustainable Energy Reviews

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Techno-economic assessment of solar thermal and alternative energy integration in supercritical water gasification of microalgae

Cited by 28 publications

References 57 publications

Growth rate measurements of Chlorella vulgaris in a photobioreactor by Neubauer-improved counting chamber and densitometer

Growth rate measurements of Chlorella vulgaris in a photobioreactor by Neubauer-improved counting chamber and densitometer

Bioethanol Production from Spirulina (Arthrospira platensis) by Microwave-Assisted Acid Hydrolysis Pretreatment

Concentrated solar thermochemical gasification of biomass: Principles, applications, and development

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