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Solid-State Anaerobic Microbial Ensilage: A Combined Wet Storage and Pretreatment Method for the Bioconversion of Lignocellulosic Biomass

  • Xu YangEmail author
  • Zhiping Zhang
  • Lili Song
  • Guanglu Wang
  • Jingnan Zhang
Review
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Abstract

Due to the contradiction between the discontinuity of agricultural production and continuity of industrial processing, the collection, storage and transformation of lignocellulosic biomass has become a basic problem in ensuring its sustainable development and large-scale utilization. Two broad methodologies for storage of LCB, dry and wet storage, are introduced. Process parameters including chemical reactions, microbial growth, temperature, and oxygen content, are analyzed in silage of different stages and with different microbial silage additives for the solid anaerobic treatment. Based on the results, we propose a quality evaluation system, encompassing sensory evaluation, organic acid content, soluble carbohydrate content, pH value and bacterial diversity, which can be used as criteria for judging the success of the microbial silage process. Finally, the research on solid-state anaerobic microbial silage pretreatment in biogas and ethanol conversion is summarized, and an optimized method for highly-efficient biochemical transformation of LCB is proposed based on the available findings.

Keywords

Biogas Biomass Ensiling Ethanol Wet storage 

Abbreviations

LCB

Lignocellulosic biomass

AD

Anaerobic digestion

WSC

Water-soluble carbohydrates

LAB

Lactic acid bacteria

DM

Dry matter

SEM

Scanning electron microscope

DCS

Dry corn stover

BMP

Biochemical methane potential

TS

Total solids

VS

Volatile solids

CFU

Colony forming units

FPU

Filter paper unit

HMF

5-Hydroxymethyl-2-furfural

SSF

Simultaneous saccharification and fermentation

PM

Pig manure

ES

Excess sludge

HWT

Hot-washing treatment

Notes

Acknowledgements

This work was funded by the Doctoral Scientific Research Foundation of Zhengzhou University of Light Industry (No. 0123/13501050066).

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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Henan Key Laboratory of Cold Chain Food Quality and Safety ControlZhengzhouChina
  2. 2.Collaborative Innovation Center for Food Production and SafetyZhengzhouChina
  3. 3.School of Food and BioengineeringZhengzhou University of Light IndustryZhengzhouChina

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