Benefits of supplementing an industrial waste anaerobic digester with energy crops for increased biogas production

Nges, Ivo Achu; Escobar, Federico; Fu, Xing; Björnsson, Lovisa

doi:10.1016/j.wasman.2011.09.009

Cited by 60 publications

(27 citation statements)

References 33 publications

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“…Consumption of electricity (2% of the energy in the biogas) and heat (to heat up the substrates from 8 to 37 ºC) was modelled according to (24). Fugitive CH 4 emissions were taken as 1% of the produced CH 4 , based on recent studies (24,35,36). More details on the modelling of anaerobic digestion can be found in the SI.…”

Section: Bte Conversion Technologies and Pre-treatmentsmentioning

confidence: 99%

“…The resulting cold gas and carbon conversion efficiency (CGE and CCE) was 70% (±15%) and 95% (±4%), respectively. Consumption of electricity (26 kWh Mg -1 DM) was based on (36).…”

Section: Bte Conversion Technologies and Pre-treatmentsmentioning

confidence: 99%

Section: Anaerobic Digestionmentioning

confidence: 99%

“…and macro-nutrients (high C to N ratio); recent studies have indicated the optimal C to N ratio to be between 16-20 (36-38) and have demonstrated how a sub-optimal concentration of selected micro-nutrients may lead to process failure (36). Co-digestion with nutrients-rich substrates such as the organic fraction of municipal solid waste or manure may solve these problems (36,37). In addition, manure represents one of the most abundant domestically available biomass resources for Denmark (about 23-34 PJ) which is only to a minor extent (6% of the potential) exploited for energy production (39).…”

Section: Anaerobic Digestionmentioning

confidence: 99%

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Bioenergy Production from Perennial Energy Crops: A Consequential LCA of 12 Bioenergy Scenarios including Land Use Changes

Tonini

Hamelin

Wenzel

et al. 2012

Environ. Sci. Technol.

105

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In the endeavor of optimizing the sustainability of bioenergy production in Denmark, this consequential life cycle assessment (LCA) evaluated the environmental impacts associated with the production of heat and electricity from one hectare of Danish arable land cultivated with three perennial crops: ryegrass (Lolium perenne), willow (Salix viminalis) and Miscanthus giganteus. For each, four conversion pathways were assessed against a fossil fuel reference: I) anaerobic co-digestion with manure, II) gasification, III) combustion in small-to-medium scale biomass combined heat and power (CHP) plants and IV) co-firing in large scale coal-fired CHP plants. Soil carbon changes, direct and indirect land use changes as well as uncertainty analysis (sensitivity, MonteCarlo) were included in the LCA. Results showed that global warming was the bottleneck impact, where only two scenarios, namely willow and Miscanthus co-firing, allowed for an improvement as compared to the reference (-82 and -45 t CO 2 -eq. ha -1 , respectively). The indirect land use changes impact was quantified as 310 ±170 t CO 2 -eq. ha -1 , representing a paramount average of 41% of the induced greenhouse gas emissions. The uncertainty analysis confirmed the results robustness and highlighted the indirect land use changes uncertainty as the only uncertainty that can significantly change the outcome of the LCA results.3

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Section: Bte Conversion Technologies and Pre-treatmentsmentioning

confidence: 99%

“…The resulting cold gas and carbon conversion efficiency (CGE and CCE) was 70% (±15%) and 95% (±4%), respectively. Consumption of electricity (26 kWh Mg -1 DM) was based on (36).…”

Section: Bte Conversion Technologies and Pre-treatmentsmentioning

confidence: 99%

Section: Anaerobic Digestionmentioning

confidence: 99%

Section: Anaerobic Digestionmentioning

confidence: 99%

See 2 more Smart Citations

Bioenergy Production from Perennial Energy Crops: A Consequential LCA of 12 Bioenergy Scenarios including Land Use Changes

Tonini

Hamelin

Wenzel

et al. 2012

Environ. Sci. Technol.

105

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“…A large number of studies focused on optimizing anaerobic digestions via manipulating the system's operational parameters, such as the substrate C:N ratio [5]- [10]. However, the microbial communities within the anaerobic digestion have not been comprehensively explored.…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic Analysis of Anaerobic Co-Digestion of Animal Manure and Corn Stover Reveals Linkages between Bacterial Communities and Digestion Performance

Yang¹,

Chen²,

Yue³

et al. 2016

AiM

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Over 3 million tons of manures are produced annually in the United States and pose environmental and health risks if not remediated. Anaerobic digestion is an effective method in treating organic wastes to reduce environmental impacts and produce methane as an alternative energy. Previous studies suggested that optimization of feed composition, hydraulic retention time, and other operational conditions can greatly improve total solids removal and increase methane productivity. These environmental factors improve functionality by altering the microbial community structure but explicit details of how the bacterial community shifts are poorly understood. Our investigations were conducted to investigate the relationship between environmental factors, microbial community structure and bioreactor efficiency by using metagenomic analysis of the microbial communities. Our results indicated that the bioreactor with the greatest methane production, digestion efficiency and reduced levels of E. coli/Shigella had a distinctive community structure at the genus level with unique and abundant uncultivated strains of Bacteroidetes. Moreover the same bioreactor was enriched in Aminomonas paucivorans and Clostridia populations that can utilize secondary metabolites produced during cellulose/hemicellulose degradation to generate hydrogen and acetate. Hence specific digestion conditions that enrich for these populations may provide a route to the optimization of co-digestion systems and control the variability in reactor performance.

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Biogas

Ben¹,

Kennes²,

Veiga³

2013

Air Pollution Prevention and Control

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Benefits of supplementing an industrial waste anaerobic digester with energy crops for increased biogas production

Cited by 60 publications

References 33 publications

Bioenergy Production from Perennial Energy Crops: A Consequential LCA of 12 Bioenergy Scenarios including Land Use Changes

Bioenergy Production from Perennial Energy Crops: A Consequential LCA of 12 Bioenergy Scenarios including Land Use Changes

Phylogenetic Analysis of Anaerobic Co-Digestion of Animal Manure and Corn Stover Reveals Linkages between Bacterial Communities and Digestion Performance

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