Fig. 5From: Microbial predation accelerates granulation and modulates microbial community compositionMicrographs of protozoa and metazoa in floccular and granular sludge. a A swimming ciliate, Paramecium spp. and b sessile ciliates. c Metazoa such as tardigardes and d large rotifers from the genus Euchlanis. e Crawling ciliates (circled in white) were commonly sighted. f and g Sessile ciliates attached on the surface of granules. (Bar, 50 μm)Back to article page