Techno-economic and life-cycle analyses of dark fermentative hydrogen production integrated with anaerobic digestion from coffee-manufacturing wastewater under thermophilic and mesophilic conditions
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Abstract
Techno-economic analysis and life cycle assessment of thermophilic dark fermentation (TDF) and mesophilic dark fermentation (MDF) integrated with anaerobic digestion (AD) from coffee-manufacturing wastewater (CW) as feedstock were studied. The pilot plants were based in Iran and designed to convert 800 m3/day of CW into hydrogen. The hydrogen volume flow rate (m3/h) under thermophilic conditions was 1.1 times higher than that under mesophilic conditions; however, the hydrogen mass flow rate (kg/h) was approximately equal in both conditions (1.04). The hydrogen production costs for the MDF-AD and TDF-AD plants were 3.86 and 3.84 USD/kg, respectively. A payback period of 1.3 and 1.33 years for the MDF-AD and TDF-AD plants were obtained, respectively. The Global warming potential from the entire system was 0.79 kg CO2-eq/kg hydrogen for the DF-AD plants. The DF commercialization is supported by environmental advantages, despite its higher hydrogen cost than natural gas-based methods.
期刊介绍:
Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies.
Topics include:
• Biofuels: liquid and gaseous biofuels production, modeling and economics
• Bioprocesses and bioproducts: biocatalysis and fermentations
• Biomass and feedstocks utilization: bioconversion of agro-industrial residues
• Environmental protection: biological waste treatment
• Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.