Abstract：
:Long-term production in commercial straw biogas plants has been rare in China due to inefficiencies in the logistics stream. Biomass densification could be a potential solution to this issue. Therefore, we conducted a study to evaluate whether biomass densification is a more efficient and sustainable option. We performed methane production experiments to investigate fermentation characteristics of briquettes (with a new pretreatment, model II) and rubs (with a common pretreatment, model I). A 3000-m3 biogas plant was used to conduct a comparative analysis with solar eMergy joules. Results showed that the methane yield of briquettes of corn stover was 66.74% higher than that of rubs, and the briquettes had better digestion performance in terms of CH4 content, VFA, and alcohol. The two models required almost the same eMergy investment input, while model II obtained a greater quantity of net eMergy (16.5% higher) in comparison with model I. The net eMergy yield ratio (EYR) (biogas only) of model I and model II was 0.99 and 1.67, respectively, showing less market competitiveness for commercial operations with model I. Meanwhile, the logistic costs of model II could be reduced to approximately US $34,514 annually.
journal_name
3 Biotechjournal_title
3 Biotechauthors
Tao L,Junting P,Xi M,Hailong H,Yan L,Xia X,Ruyi H,Zili Mdoi
10.1007/s13205-017-0914-3subject
Has Abstractpub_date
2017-10-01 00:00:00pages
283issue
5eissn
2190-572Xissn
2190-5738pii
914journal_volume
7pub_type
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