Journal
BIORESOURCE TECHNOLOGY
Volume 290, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.121787
Keywords
Anaerobic membrane bioreactor (AnMBR); Biogas; Microalgae; 16S rRNA gene; Rumen
Funding
- Spanish Ministry of Economy and Competitiveness (MINECO) [CTM2011-28595-C02-01, CTM2011-28595-C02-02]
- Education, Investigation, Culture and sports Council from the Valencian Generality [APOSTD/2016/104]
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Ruminal fluid was inoculated in an Anaerobic Membrane Reactor (AnMBR) to produce biogas from raw Scenedesmus. This work explores the microbial ecology of the system during stable operation at different solids retention times (SRT). The 16S rRNA amplicon analysis revealed that the acclimatised community was mainly composed of Anaerolineaceae, Spirochaetaceae, Lentimicrobiaceae and Cloacimonetes fermentative and hydrolytic members. During the highest biodegradability achieved in the AnMBR (62%) the dominant microorganisms were Fervidobacterium and Methanosaeta. Different microbial community clusters were observed at different SRT conditions. Interestingly, syntrophic bacteria Gelria and Smithella were enhanced after increasing 2-fold the organic loading rate, suggesting their importance in continuous systems producing biogas from raw microalgae.
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