Subcritical Water Hydrolysis of Microalgal Biomass for Protein and Pyrolytic Bio-oil Recovery

Phusunti, Neeranuch; Phetwarotai, Worasak; Tirapanampai, Charndanai; Tekasakul, Surajit

doi:10.1007/s12155-017-9859-y

Cited by 16 publications

(8 citation statements)

References 54 publications

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“…However, values of solubilisation of proteins ranging from 27% at 100ºC to 33% at 190ºC were obtained by SWE from the SC-CO2 exhausted solid fractions. Phusunti et al[25] also reported no influence of the temperature of SWE on the protein solubilisation from Chlorella vulgaris working at 150, 180, and 200ºC. However, they obtained higher protein solubilisation than those obtained in this work (around 66% for extraction at 90 min and 42% at 180 min).…”

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confidence: 54%

“…However, there is limited research on subcritical water extraction from microalgae and the few published studies worked with pure species. Awaluddin et al [24] and Phusunti et al [25] optimised the subcritical water extraction on two Chlorella vulgaris biomasses with distinct compositions. The co-solubilisation of the carbohydrate and protein components was detected in both research works.…”

Section: After Lipid Extraction Subcritical Water Extraction (Swe) Is...mentioning

confidence: 99%

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Sequential valorisation of microalgae biomass grown in pig manure treatment photobioreactors

et al. 2020

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confidence: 54%

Section: After Lipid Extraction Subcritical Water Extraction (Swe) Is...mentioning

confidence: 99%

Sequential valorisation of microalgae biomass grown in pig manure treatment photobioreactors

et al. 2020

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“…Extraction of the protein allowed for a higher C/N ratio and lower ash content in the hydrochar . Integrated protein extraction with pyrolysis has been explored for microalgae and sewage sludge with promising results, ,,, but little is available on the pretreatment of lignocellulosic biomass to remove protein before pyrolysis.…”

Section: Conversion Pathways For Low-cost N-containing Biomassmentioning

confidence: 99%

Recovery of Nitrogen from Low-Cost Plant Feedstocks Used for Bioenergy: A Review of Availability and Process Order

et al. 2021

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The cost of feedstock is often a major barrier to commercialization for lignocellulosic biofuels. Much of the research on biofuel and biobased chemical production has focused on the carbohydrate, lignin, and lipid components of biomass. There are numerous opportunities for the use of lower-cost feedstocks if more attention were devoted to the recovery and utilization of the protein and other N-containing components. This review compiles data from the last two decades on nonedible/ nonpalatable agricultural residues, deoiled seedcakes, bioethanol and biogas residues, and food wastes, with a focus on the amounts and types of N-containing components. Given the challenges of removing N-containing compounds from biofuel intermediates postconversion, a case is made for the extraction and purification of proteins (and other N-containing compounds) from low-cost lignocellulosic biomass before conversion to fuel. The goal of such processes is to avoid difficult fuel upgrading steps while enhancing the opportunities for additional biorefinery products and sustainable nitrogen cycles.

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“…in which proteins and carbohydrates were extracted from C. vulgaris , the authors concluded that higher temperatures (above 160 °C) are needed for efficient extraction. In addition, Phusunti et al . also performed the extraction of soluble proteins from C. vulgaris using subcritical water hydrolysis.…”

Section: Introductionmentioning

confidence: 99%

Scenedesmus obliquusmicroalga‐based biorefinery – from brewery effluent to bioactive compounds, biofuels and biofertilizers – aiming at a circular bioeconomy

Ferreira

Ribeiro

Ferreira

et al. 2019

Biofuels Bioprod Bioref

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The circular bioeconomy concept relies on the exploitation of wastes as a feedstock of different biotechnological processes to obtain, as much as possible, a huge spectrum of biochemical components through a biorefinery platform. This work deals with the treatment of brewery effluent through the cultivation of Scenedesmus obliquus microalga and the use of the biomass in a complex biorefinery. The treatment proved efficient in the removal of nutrients (N, P and COD removals of 88, 30 and 71% respectively). Several compounds and products were obtained from the biomass, such as: (a) phenols (0.249-1.016 mg GAE mL −1 ) and flavonoids (0.05-0.167 mg CE mL −1 ) by subcritical water extraction (SWE) at 120 °C, the extraction efficiency being five times higher at 200 °C; (b) biohydrogen by dark fermentation (67.1 mL H 2 g VS −1 ); (c) bio-oil (64%), biochar (30%) and biogas (6%) by pyrolysis; and (d) enhanced capacity of germination/growth of wheat and barley seeds by S. obliquus culture and biomass (pellet, after centrifugation); better results were obtained with the biomass cultivated in brewery effluent (when compared with synthetic medium), and the biomass pellet was better than the whole culture; barley seeds 1170 A Ferreira et al.In the Field: Scenedesmus obliquus microalga-based biorefinery aiming at a circular bioeconomy treated with the pellet from the brewery effluent had the highest germination index (GI) of 85 compared with the control (tap water) GI of 35. The innovative study emphasis was on reducing microalgae production costs, providing environmental benefits in a biorefinery-based S. obliquus platform.

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Subcritical Water Hydrolysis of Microalgal Biomass for Protein and Pyrolytic Bio-oil Recovery

Cited by 16 publications

References 54 publications

Sequential valorisation of microalgae biomass grown in pig manure treatment photobioreactors

Sequential valorisation of microalgae biomass grown in pig manure treatment photobioreactors

Recovery of Nitrogen from Low-Cost Plant Feedstocks Used for Bioenergy: A Review of Availability and Process Order

Scenedesmus obliquusmicroalga‐based biorefinery – from brewery effluent to bioactive compounds, biofuels and biofertilizers – aiming at a circular bioeconomy

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