We compared intermittent and continuous UASB reactors upon operational shocks
Syntrophomonadaceae key microbial group for maximizing biogas was quantified by FISH
Syntrophomonadaceae is present in intermittent but not in continuous UASB reactors.
Syntrophomonadaceae abundance increases with fat shock in intermittent UASB reactor.
Syntrophomonadaceae abundance decreases with hydraulic or temperature shock.