Cited by 142Anaerobic Digestion and Biogas ProductionAlgal biology and biofuel productionCatalysts for Methane Reforming

Biogas production and valorization by means of a two-step biological process

Converti, A., Oliveira, R.P.S., Torres, B.R., Lodi, A., Zilli, M.·2009·Bioresource Technology

Abstract

The scope of this research work was to investigate biogas production and purification by a two-step bench-scale biological system, consisting of fed-batch pulse-feeding anaerobic digestion of mixed sludge, followed by methane enrichment of biogas by the use of the cyanobacterium Arthrospiraplatensis. The composition of biogas was nearly constant, and methane and carbon dioxide percentages ranged between 70.5-76.0% and 13.2-19.5%, respectively. Biogas yield reached a maximum value (about 0.4 m(3)(biogas)/kg COD(i)) at 50 days-retention time and then gradually decreased with a decrease in the retention time. Biogas CO(2) was then used as a carbon source for A. platensis cultivation either under batch or fed-batch conditions. The mean cell productivity of fed-batch cultivation was about 15% higher than that observed during the last batch phase (0.035+/-0.006 g(DM)/L/d), likely due to the occurrence of some shading effect under batch growth conditions. The data of carbon dioxide removal from biogas revealed the existence of a linear relationship between the rates of A. platensis growth and carbon dioxide removal from biogas and allowed calculating carbon utilization efficiency for biomass production of almost 95%.

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Crossref · 10.1016/j.biortech.2009.05.072

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Authors
Converti, A., Oliveira, R. P. S., Torres, B. R., Lodi, A., & Zilli, M.
Affiliations
University of Genoa (IT)
Corresponding author
Converti, A.
Venue
Bioresource Technology
Publisher
Elsevier BV
Published
2009-12
Volume
100
Issue
23
Pages
5771-5776
ISSN
0960-8524 (ISSN-L)
OpenAlex
W2042773156
Cited by
142
References
36
Citations by year
2026: 4 · 2025: 3 · 2024: 6 · 2023: 13 · 2022: 10 · 2021: 5 · 2020: 8 · 2019: 10 · 2018: 8 · 2017: 8 · 2016: 6 · 2015: 22 · 2014: 7 · 2013: 8 · 2012: 10
FWCI
20.15
Type
journal article
Language
en
Open access
closed
Locations
  • Bioresource Technology (publishedVersion)
  • PubMed (publishedVersion)
  • Scientific Electronic Library Online (São Paulo Research Foundation, Latin American and Caribbean Center on Health Sciences Information, Conselho Nacional de Desenvolvimento Científico e Tecnológico) (publishedVersion)
  • CINECA IRIS Institutial Research Information System (University of Genoa) (submittedVersion)
Topics
  • Physical Sciences › Engineering › Building and Construction › Anaerobic Digestion and Biogas Production
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
  • Physical Sciences › Chemical Engineering › Catalysis › Catalysts for Methane Reforming
Keywords
biogas production, biogas upgrading, anaerobic digestion, Spirulina platensis, cyanobacteria, methane enrichment, carbon dioxide removal, carbon use efficiency, sludge, retention time, cell productivity
MeSH terms
Cyanobacteria, Biotechnology, Carbon Dioxide, Gases, Hydrogen-Ion Concentration, Methane, Photosynthesis, Sewage, Time Factors, Waste Disposal, Fluid, Water Purification, Biomass, Bioreactors, Eukaryota

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