Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2020 Mar 7;12(3):612.
doi: 10.3390/polym12030612.

Effect of Pre-Corrected pH on the Carbohydrate Hydrolysis of Bamboo during Hydrothermal Pretreatment

Lingzhi Huang  1   2 , Zeguang Yang  1   2 , Mei Li  1   2 , Zhaomeng Liu  1   2 , Chengrong Qin  1   2 , Shuangxi Nie  1   2 , Shuangquan Yao  1   2
Affiliations

Effect of Pre-Corrected pH on the Carbohydrate Hydrolysis of Bamboo during Hydrothermal Pretreatment

Lingzhi Huang et al. Polymers (Basel). .

Abstract

To confirm the prospects for application of pre-corrected pH hydrothermal pretreatment in biorefineries, the effects of pH on the dissolution and degradation efficiency of carbohydrates were studied. The species composition of the hydrolysate was analyzed using high efficiency anion exchange chromatography and UV spectroscopy. The result showed that the greatest balance between the residual solid and total dissolved solids was obtained at pH 4 and 170 °C. Maximum recovery rates of cellulose and lignin were as expected, whereas hemicellulose had the least recovery rate. The hemicellulose extraction rate was 42.19%, and the oligomer form accounted for 93.39% of the product. The physicochemical properties of bamboo with or without pretreatment was characterized. Compared with the traditional hydrothermal pretreatment, the new pretreatment bamboo has higher fiber crystallinity and thermal stability. In the pretreatment process, the fracture of β-aryl ether bond was inhibited and the structural dissociation of lignin was reduced. The physicochemical properties of bamboo was protected while the hemicellulose was extracted efficiently. It provides theoretical support for the efficient utilization of all components of woody biomass.

Keywords: cellulose; hemicellulose; hydrothermal pretreatment; lignin; pre-corrected pH.

PubMed Disclaimer

Conflict of interest statement

The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript; or in the decision to publish the results.

Figures

Figure 1
Figure 1
Effect of pH and temperature on MS and TDS in hydrothermal pretreatment (a) MS removal, (b) TDS content.
Figure 2
Figure 2
Effect of hydrothermal pretreatment on recovery ratio.
Figure 3
Figure 3
Effect of pH on xylo units in pre-corrected pH hydrothermal pretreatment.
Figure 4
Figure 4
Effect of pH on glucose-units in pre-corrected pH hydrothermal pretreatment.
Figure 5
Figure 5
XRD spectra of bamboo with or without hydrothermal pretreatment.
Figure 6
Figure 6
Effect of pH on PCs in pre-corrected pH hydrothermal pretreatment.
Figure 7
Figure 7
2D-NMR of lignin with and without pretreatment (a. raw material, b. traditional hydrothermal pretreatment, c. pre-corrected pH hydrothermal pretreatment).
Figure 8
Figure 8
Thermal stability of bamboo with or without pretreatment (a. TGA curves, b. DTG curves).
Figure 9
Figure 9
SEM of bamboo with or without hydrothermal pretreatment (a,d,j): raw material. (b,e,h): traditional hydrothermal pretreatment. (c,f,i): pre-corrected pH hydrothermal pretreatment).
See this image and copyright information in PMC

Similar articles

See all similar articles

Cited by

References

    1. Ingole P.G., Choi W., Kim K.H., Park C.H., Choi W.K., Lee H.K. Synthesis, characterization and surface modification of PES hollow fiber membrane support with polydopamine and thin film composite for energy generation. Chem. Eng. J. 2014;243:137–146. doi: 10.1016/j.cej.2013.12.094. - DOI
    1. Bergthorson J.M., Goroshin S., Soo M.J., Julien P., Palecka J., Frost D.L., Jarvis D.J. Direct combustion of recyclable metal fuels for zero-carbon heat and power. Appl. Energy. 2015;160:368–382. doi: 10.1016/j.apenergy.2015.09.037. - DOI
    1. Yao S., Nie S., Yuan Y., Wang S., Qin C. Efficient extraction of bagasse hemicelluloses and characterization of solid remainder. Bioresour. Technol. 2015;185:21–27. doi: 10.1016/j.biortech.2015.02.052. - DOI - PubMed
    1. Yao S., Nie S., Zhu H., Wang S., Song X., Qin C. Extraction of hemicellulose by hot water to reduce adsorbable organic halogen formation in chlorine dioxide bleaching of bagasse pulp. Ind. Crop. Prod. 2017;96:178–185. doi: 10.1016/j.indcrop.2016.11.046. - DOI
    1. Martinsampedro R., Eugenio M.E., Moreno J.A., Revilla E., Villar J.C. Integration of a kraft pulping mill into a forest biorefinery: Pre-extraction of hemicellulose by steam explosion versus steam treatment. Bioresour. Technol. 2014;153:236–244. doi: 10.1016/j.biortech.2013.11.088. - DOI - PubMed

LinkOut - more resources