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    Author(s): Haifeng Zhou; Roland GleisnerJ.Y. Zhu; Yuanyu Tian; Yingyun Qiao
    Date: 2018
    Source: Energy & Fuels. 32(7): 7636-7642.
    Publication Series: Scientific Journal (JRNL)
    Station: Forest Products Laboratory
    PDF: Download Publication  (1.0 MB)


    This study investigated the recycle utilization of SPORL pretreatment spent liquor. Three ligno sulfonates (LSs)were purified from the spent liquor of SPORL pretreated Beetle-killed lodgepole pine (BKLP), Poplar NE222 (NE222),and Douglas-fir(FS10). The structural characterization showed that the apparent molecular mass and sulfur content of NE222-LS were lowest, but the phenolic group content was highest. FS10 LS, from a pH profiling SPORL pretreatment, had the highest apparent molecular mass but medium sulfur and phenolic group content. The spectral analyses exhibited that the guaiacyl unit was the main structure in BKLP and FS10 LSs, while NE222-LS mainly contained both guaiacyl and syringyl units. Both LSs and SPORL pretreatment spent liquors were used as additives to enzymatic hydrolysis of Whatman paper and ethanol production from glucose. LSs and liquors, from SPORL pretreated BKLP and NE222, could obviously enhance the enzymatic saccharification. Nevertheless, LS and liquor from SPORL pretreated FS10 presented as light negative effect on enzymatic saccharification. All LSs and liquors with low concentration exhibited no inhibition on ethanol fermentation from glucose. When whole spent liquors without any detoxification were applied to prepare the fermentation medium with an initial glucose concentration of 100g/L, the ethanol yield was almost the same as the control for BKLP and FS10 liquors. Nevertheless, the whole NE222 liquor without detoxification inhibited ethanol production thoroughly.

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    Zhou, Haifeng; Gleisner, Roland; Zhu, J.Y.; Tian, Yuanyu; Qiao, Yingyun. 2018. SPORL pretreatment spent liquors enhance the enzymatic hydrolysis of cellulose and ethanol production from glucose. Energy and Fuels. 32(7): 7636-7642.


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    Non-productive cellulase binding, lingo sulfonate, SPORL, enzymatic saccharification, woody biomass, biofuel, fermerntation

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