Air-side ammonia stripping coupled to anaerobic digestion indirectly impacts anaerobic microbiome.

ABSTRACT: 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 b

SUBMITTER: Fernandez-Gonzalez N 

PROVIDER: S-EPMC6801131 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature