Title:
On Integration of Anaerobic Digestion and Torrefaction-pyrolysis for Wet and Dry Biomass Waste Valorization: Preliminary Mass, Energy, and Sensitivity Analysis
Author(s):
Ochieng, R., Sarker, S.
Document(s):
Paper
Poster
Abstract:
As a result of the variations in biomass characteristics, relying on a single biochemical or thermochemical conversion process for biofuel production may have technical and economic limitations in biorefining. To address these limitations, we propose an integrated waste biorefinery concept that combines anaerobic digestion (AD) of wastewater sludge with the torrefaction-pyrolysis of wood residues. The proposed concept generates biomethane, bio-oil, digestate, and char, providing a sustainable and efficient waste management solution. Results revealed energy efficiencies of 59 % for the AD, 87% for pyrolysis, and 75 % for the integrated processes. With fuel gas used as the energy source, the mass indexes for the AD, torrefaction-pyrolysis, and integrated configuration were 0.93, 0.74, and 0.78, respectively. The parametric sensitivity analyses revealed that the pyrolysis subprocess is crucial for meeting the energy demands of the integrated process.
Keywords:
anaerobic digestion, pyrolysis, sewage sludge, torrefaction, wood residues, integrated bioprocesses, sensivity analysis
Topic:
Biomass, Bio-based Products and Bioenergy Integration
Subtopic:
Biomass use in biorefineries
Event:
32nd European Biomass Conference and Exhibition
Session:
3CV.6.1
Pages:
451 - 455
ISBN:
978-88-89407-24-0
Paper DOI:
10.5071/32ndEUBCE2024-3CV.6.1
Price:
FREE
