RT Journal Article
T1 Air-side ammonia stripping coupled to anaerobic digestion indirectly impacts anaerobic microbiome
A1 Fernández González, Nuria
A1 Pedizzi, Chiara
A1 Lema Rodicio, Juan Manuel
A1 Carballa Arcos, Marta
K1 Anaerobic microbiome
K1 Air-side
AB Air‐side stripping without a prior solid–liquid phase separation step is a feasible and promising process to control ammonia concentration in thermophilic digesters. During the process, part of the anaerobic biomass is exposed to high temperature, high pH and aerobic conditions. However, there are no studies assessing the effects of those harsh conditions on the microbial communities of thermophilic digesters. To fill this knowledge gap, the microbiomes of two thermophilic digesters (55°C), fed with a mixture of pig manure and nitrogen‐rich co‐substrates, were investigated under different organic loading rates (OLR: 1.1–5.2 g COD l−1 day−1), ammonia concentrations (0.2–1.5 g free ammonia nitrogen l−1) and stripping frequencies (3–5 times per week). The bacterial communities were dominated by Firmicutes and Bacteroidetes phyla, while the predominant methanogens were Methanosarcina sp archaea. Increasing co‐substrate fraction, OLR and free ammonia nitrogen (FAN) favoured the presence of genera Ruminiclostridium, Clostridium and Tepidimicrobium and of hydrogenotrophic methanogens, mainly Methanoculleus archaea. The data indicated that the use of air‐side stripping did not adversely affect thermophilic microbial communities, but indirectly modulated them by controlling FAN concentrations in the digester. These results demonstrate the viability at microbial community level of air side‐stream stripping process as an adequate technology for the ammonia control during anaerobic co‐digestion of nitrogen‐rich substrates
PB Wiley
YR 2019
FD 2019
LK http://hdl.handle.net/10347/22052
UL http://hdl.handle.net/10347/22052
LA eng
NO Nuria Fernandez‐Gonzalez  et al. (2019). Air‐side ammonia stripping coupled to anaerobic digestion indirectly impacts anaerobic microbiome. "Microbial biotechnology", vol. 12, n. 6 p. 1403-1416
NO This research was supported by the European Community Seventh Framework Programme (ManureEcoMine project – 603744); and by the Spanish Government (AEI) through CDTI (SmartGreenGas project – 2014-CE224). The authors belong to the Galician Competitive Research Group ED431C 2017/029 and to the CRETUS StrategicPartnership (ED431E 2018/01), co-funded by FEDER (UE). Computational resources were kindly provided and supported by Fundacion Publica Galega Centro Tecnolóxico de Supercomputación de Galicia (CESGA)
DS Minerva
RD 24 abr 2026