声明
Abstract
摘要
Contents
Chapter 1 Introduction
1．1 LignoceUulosic biomass for energy production via anaerobic digestion
1．2 Enhancing energy recovery potential of lignocellulosic materials via different pretreatment methods
1．3 Physical Pretreatment
1．4 Physicochemical Pretreatment
1．5 Chemical Pretreatment
1．6 Microbial Pretreatment
1．7 Use of additives
1．8 Factors affecting bioehar properties
1．9 Research objectives
1．10 Research content and route
Chapter 2 Materials and methods
2．1 Substrates，reagents(rich in microbes)，biochar，and inoculum
2．2 Laboratory reagents and equipment
2．3 Anaerobic digester
2．4 Analytieal methods
2．4．1 Total solids(TS)and volatile solids(VS)contents
2．4．2 Elemental analysis
2．4．3 pH value
2．4．4 Methane content in biogas
2．4．5 Volatile fatty acids(VFAs)content
2．4．6 SEM
2．4．7 FTIR
2．4．8 XRD
2．5 Theoretical methane yield and biodegradability
2．6 Calculation of methane production
2．7 Kinetic models for the methane production during anaerobic digestion
2．8 16S rDNA gene sequencing and analysis
2．9 Statistical analysis
Chapter 3 Microbial pretreatment of the rice straw for the enhancement of methane production and energy conversion potentlal vla anaerobic digestlon
3．1 Materials
3．2 Experiment design
3．3 Results and discussion
3．3．1 Characteristics of substrates，reagents and inoculum
3．3．2 Variations in O2 and CO2 production during microbial pretreatment
3．3．3 VFAs and pH after pretreatment
3．3．4 Effect of microbial pretreatment on daily methane production
3．3．5 Effect of microbial pretreatment on cumulative methane production
3．3．6 Structural analysis after microbial pretreatment
3．3．7 Biodegradability
3．3．8 Modified Gompertz model
3．3．9 AD system stability
3．3．10 Energy，economic，and environmental analysis
3．4 Summary
Chapter 4 Enhancement of methane production performance of wheat straw by combined pretreatment with different microbial consortium and oxygen
4．1 Materials
4．2 Experiment design
4．3 Results and discussion
4．3．1 Characteristics of feedstock，reagents and inoculum
4．3．2 Oxygen variations and carbon dioxide production during pretreatment
4．3．3 VFAs concentrations／compositions and pH after pretreatment
4．3．4 Effect of microbial prtreatent on aily methane production
4．3．5 Effect of microbial pretreatment on cumulative methane production
4．3．6 Structural analysis followed by oxygen and microbial pretreatment
4．3．7 Biodegradability
4．3．8 Modified Gompertz model
4．3．9 AD system stability
4．3．10 Comparison of current study with different pretreatment methods of WS
4．4 Summary
Chapter 5 Microbial community dynamics of rice and wheat straw before pretreatment，after pretreatment and after anaerobic digestion
5．1 Materials
5．2 Experiment design
5．3 Results and discussion
5．3．1 Characteristics of feedstocks and inoculum
5．3．2 Microbial community analysis of RS before and after pretreatment
5．3．3 Microbial community analysis of WS before and after pretreatment
5．3．4 Microbial community diversity after AD
5．4 Summary
Chapter 6 Enhancement of methane production performance of crop residues using different biochars as additives
6．1 Materials
6．2 Experiment design
6．3 Results and discussions
6．3．1 Characteristics of feedstocks，biochar and inoculum
6．3．2 Effect of biochars additives on daily methane productions
6．3．3 Effect of bioehars additives on cumulative methane productions
6．3．4 Role of bioehar in facilitating microbial adhesion
6．3．5 Biodegradability(BD)
6．3．6 Kinetics analysis
6．3．7 Effluent characteristics
6．4 Summary
Chapter 7 Conclusions
7．1 Main conclusions
7．2 Innovation
7．3 Research prospect
References
Acknowledgements
List of Publications
Introduction of author and advisor
北京化工大学;
