A long-term pilot-scale algal cultivation on power plant flue gas – Cultivation stability and biomass accumulation

Cutshaw, Ashley; Daiek, Carly; Zheng, Yurui; Frost, Henry; Marks, Annaliese; Clements, Douglas H.; Uludağ-Demirer, Sibel; Verhanovitz, N.; Pavlik, David; Clary, William; Liu, Yan; Liao, Wei

doi:10.1016/j.algal.2020.102115

Cited by 9 publications

(2 citation statements)

References 33 publications

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“…The utilization of flue gases from various enterprises and thermal power plants is an extremely relevant topic. As mentioned earlier, algae are able to capture CO 2 and thereby increase their self-production [153][154][155][156][157][158][159][160][161][162]. Next, we will consider several different experiments devoted to the disposal of flue gases using the cultivation of algal biomass.…”

Section: Description Of Flue Gas Disposal Experimentsmentioning

confidence: 99%

Industrial CO2 Capture by Algae: A Review and Recent Advances

2022

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The problem of global warming and the emission of greenhouse gases is already directly affecting the world’s energy. In the future, the impact of CO2 emissions on the world economy will constantly grow. In this paper, we review the available literature sources on the benefits of using algae cultivation for CO2 capture to decrease CO2 emission. CO2 emission accounts for about 77% of all greenhouse gases, and the calculation of greenhouse gas emissions is 56% of all CO2 imports. As a result of the study of various types of algae, it was concluded that Chlorella sp. is the best at capturing CO2. Various methods of cultivating microalgae were also considered and it was found that vertical tubular bioreactors are emerging. Moreover, for energy purposes, thermochemical methods for processing algae that absorb CO2 from flue gases were considered. Of all five types of thermochemical processes for producing synthesis gas, the most preferred method is the method of supercritical gasification of algae. In addition, attention is paid to the drying and flocculation of biofuels. Several different experiments were also reviewed on the use of flue gases through the cultivation of algae biomass. Based on this literature review, it can be concluded that microalgae are a third generation biofuel. With the absorption of greenhouse gases, the growth of microalgae cultures is accelerated. When a large mass of microalgae appears, it can be used for energy purposes. In the results, we present a plan for further studies of microalgae cultivation, a thermodynamic analysis of gasification and pyrolysis, and a comparison of the results with other biofuels and other algae cultures.

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Section: Description Of Flue Gas Disposal Experimentsmentioning

confidence: 99%

Industrial CO2 Capture by Algae: A Review and Recent Advances

2022

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“…Chlorella sorokiniana, a freshwater species of green microalgae, is a good candidate for this application due to its demonstrated resilience against acidifying gases, such as SO x and NO x , that can be present in flue gas [9]. In addition, C. sorokiniana has a high protein content, recorded as being 58.6% of the dry matter [10]. C. sorokiniana biomass was first characterized using gel electrophoresis and macromolecular analysis.…”

Section: Introductionmentioning

confidence: 99%

Protein Extraction, Precipitation, and Recovery from Chlorella sorokiniana Using Mechanochemical Methods

et al. 2023

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Protein extraction, precipitation, and recovery methods were evaluated by this study using a green alga—Chlorella sorokiniana. A mechanochemical cell disruption process was applied to facilitate protein extraction from microalgal biomass. Optimization of the mechanochemical process resulted in milling conditions that achieved a protein extraction of 52.7 ± 6.45%. The consequent acid precipitation method was optimized to recover 98.7% of proteins from the microalgal slurry. The measured protein content of the protein isolate was 41.4% w/w. These results indicate that the precipitation method is successful at recovering the extracted proteins in the algal slurry; however, the removal of non-protein solids during centrifugation and pH adjustment is not complete. The energy balance analysis elucidated that the energy demand of the protein extraction and recovery operation, at 0.83 MJ/kg dry algal biomass, is much lower than previous studies using high-pressure homogenization and membrane filtration. This study concludes that mechanochemical protein extraction and recovery is an effective, low-energy processing method, which could be used by algal biorefineries to prepare algal proteins for value-added chemical production as well as to make algal carbohydrates and lipids in the residual biomass more accessible for biofuel production.

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