Abstract：
:The validation of a control strategy for biogas upgrading via light-driven CO2 consumption by microalgae and H2S oxidation by oxidizing bacteria using the oxygen photosynthetically generated was performed in a semi-industrial scale (9.6 m3) photobioreactor. The control system was able to support CO2 concentrations lower than 2% with O2 contents ≤ 1% regardless of the pH in the cultivation broth (ranging from 9.05 to 9.50). Moreover, the control system was efficient to cope with variations in biogas flowrate from 143 to 420 L h-1, resulting in a biomethane composition of CO2 < 2.4%, CH4 > 95.5%, O2 < 1% and no H2S. Despite the poor robustness of this technology against failures in biogas and liquid supply (CH4 concentration of 67.5 and 70.9% after 2 h of biogas or liquid stoppage, respectively), the control system was capable of restoring biomethane quality in less than 2 h when biogas or liquid supply was resumed.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Rodero MDR,Carvajal A,Arbib Z,Lara E,de Prada C,Lebrero R,Muñoz Rdoi
10.1016/j.biortech.2020.123207subject
Has Abstractpub_date
2020-07-01 00:00:00pages
123207eissn
0960-8524issn
1873-2976pii
S0960-8524(20)30478-8journal_volume
307pub_type
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