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Hydroxyl radical-aided thermal pretreatment of algal biomass for enhanced biodegradability

Overview of attention for article published in Biotechnology for Biofuels, November 2015
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Title
Hydroxyl radical-aided thermal pretreatment of algal biomass for enhanced biodegradability
Published in
Biotechnology for Biofuels, November 2015
DOI 10.1186/s13068-015-0372-2
Pubmed ID
Authors

Le Gao, Demao Li, Feng Gao, Zhiyong Liu, Yuyong Hou, Shulin Chen, Dongyuan Zhang

Abstract

Algal biomass, known as a potential feedstock for biofuel production, has cell wall structures that differ from terrestrial biomass. The existing methods for processing algae are limited to conventional pretreatments for terrestrial biomass. In this study, we investigated a novel hydroxyl radical-aided approach for pretreating different types of algal biomass. In this process, hydroxyl radicals formed by a Fenton system were employed in combination with heating to alter the crystalline structure and hydrogen bonds of cellulose in the algal biomass. FeSO4 and H2O2 at low concentrations were employed to initiate the formation of hydroxyl radicals. This method releases trapped polysaccharides in algal cell walls and converts them into fermentable sugars. The effects of temperature, time, and hydroxyl radical concentration were analyzed. The optimal pretreatment condition [100 °C, 30 min, and 5.3 mM H2O2 (determined FeSO4 concentration of 11.9 mM)] was identified using a central composite design. Complete (100 %) carbohydrate recovery was achieved with some algal biomass without formation of inhibitors such as hydroxymethylfurfural and furfural as by-products. Both microalgal and macroalgal biomasses showed higher enzymatic digestibility of cellulose conversion (>80 %) after the milder pretreatment condition. Hydroxyl radical-aided thermal pretreatment was used as a novel method to convert the carbohydrates in the algal cell wall into simple sugars. Overall, this method increased the amount of glucose released from the algal biomass. Overall, enhanced algal biomass digestibility was demonstrated with the proposed pretreatment process. The new pretreatment requires low concentration of chemical solvents and milder temperature conditions, which can prevent the toxic and corrosive effects that typically result from conventional pretreatments. Our data showed that the advantages of the new pretreatment include higher carbohydrate recovery, no inhibitor production, and lower energy consumption. The new pretreatment development mimicking natural system could be useful for biochemical conversion of algal biomass to fuels and chemicals.

Twitter Demographics

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Mendeley readers

The data shown below were compiled from readership statistics for 46 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Belgium 1 2%
Brazil 1 2%
Unknown 44 96%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 14 30%
Student > Master 7 15%
Researcher 5 11%
Other 3 7%
Student > Bachelor 3 7%
Other 4 9%
Unknown 10 22%
Readers by discipline Count As %
Agricultural and Biological Sciences 10 22%
Chemical Engineering 5 11%
Chemistry 4 9%
Environmental Science 4 9%
Biochemistry, Genetics and Molecular Biology 4 9%
Other 6 13%
Unknown 13 28%

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 02 December 2015.
All research outputs
#4,913,145
of 6,640,754 outputs
Outputs from Biotechnology for Biofuels
#382
of 538 outputs
Outputs of similar age
#172,651
of 253,670 outputs
Outputs of similar age from Biotechnology for Biofuels
#43
of 91 outputs
Altmetric has tracked 6,640,754 research outputs across all sources so far. This one is in the 14th percentile – i.e., 14% of other outputs scored the same or lower than it.
So far Altmetric has tracked 538 research outputs from this source. They receive a mean Attention Score of 3.8. This one is in the 18th percentile – i.e., 18% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 253,670 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 20th percentile – i.e., 20% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 91 others from the same source and published within six weeks on either side of this one. This one is in the 41st percentile – i.e., 41% of its contemporaries scored the same or lower than it.