6533b824fe1ef96bd128129d
RESEARCH PRODUCT
Insights into the biological process performance and microbial diversity during thermophilic microalgae co-digestion in an anaerobic membrane bioreactor (AnMBR)
A. BouzasR. Serna-garcíaL. BorrásAurora Secosubject
0301 basic medicinebiologyThermophileBiomassIndustrial fermentation010501 environmental sciencesBiodegradationPulp and paper industrybiology.organism_classification01 natural sciencesMethane03 medical and health scienceschemistry.chemical_compoundChlorella030104 developmental biologychemistryBiogasMicrobial population biologyAgronomy and Crop Science0105 earth and related environmental sciencesdescription
Abstract Harvested microalgae Chlorella spp. and primary sludge were co-digested in a laboratory-scale anaerobic membrane bioreactor (AnMBR) under thermophilic conditions (55 °C). The system was run for 700 days divided into four experimental phases to determine the influence of the organic loading rate on the process performance and the microbial community. The rise in organic loading rate from 0.17 to 0.5 gCOD·L−1·d−1 led to a 35% improvement in methane production. The system reached 69% biodegradability working at 0.5 gCOD·L−1·d−1 and a high solids retention time (70 d), indicating the efficient conversion of biomass into biogas through the AnMBR configuration while avoiding possible inhibition by free ammonia. The thermophilic AnMBR provided a stable microbial community dominated by hydrolytic and fermenter members such as Coprothermobacter, Fervidobacterium and Hydrothermae. Syntrophic oxidisers such as W5 were also key in propionate degradation and produced intermediates for later conversion into methane.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-09-01 | Algal Research |