Abstract:
:Anaerobic co-digestion of primary sludge and raw microalgae (Scenedesmus and Chlorella) was performed in a lab-scale semi-continuous anaerobic membrane bioreactor to assess the biological performance and identify the microbial community involved in the co-digestion process. The reactor was operated at 35 °C for 440 days, working at a solids retention time of 100 days. The system achieved 73% biodegradability and showed high stability in terms of pH and volatile fatty acids. An enriched microbial community was observed. Of the several phyla, Chloroflexi and Proteobacteria were the most abundant. Cellulose-degraders phyla (Bacteroidetes, Chloroflexi and Thermotogae) were detected. Syntrophic microorganisms played an important role in intermediate degradation, enhancing methane production, mainly carried out by Methanosaeta. A nutrient-rich effluent (400 mg NH4-N·L-1 and 29 mg PO4-P·L-1) and digestate (860 mg N·L-1 and 151 mg P·L-1) were obtained. The bio-nutrients released from anaerobic co-digestion could be reused for microalgae cultivation or agricultural applications.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Serna-García R,Zamorano-López N,Seco A,Bouzas Adoi
10.1016/j.biortech.2019.122521subject
Has Abstractpub_date
2020-02-01 00:00:00pages
122521eissn
0960-8524issn
1873-2976pii
S0960-8524(19)31751-1journal_volume
298pub_type
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