Fig. 5From: Partial nitritation of stored source-separated urine by granular activated sludge in a sequencing batch reactorFISH micrographs (samples taken on day 154): a Nso1225 probe targeting ammonia-oxidizing bacteria was labeled in green, b NIT3, Nstpa662, Ntcoc206 and Ntspn693 specific for nitrite-oxidizing bacteria, c EUBmix probe targeting most bacteria as labeled in blue, d three color merged image, a–c represent the same zone in the cross section of a granule. Bars are 25 μm for a–d Back to article page