Four granular sequencing batch reactors (GSBRs) were inoculated with four denitrifying Pseudomonas strains carrying nosZ to study the process of granule formation, operational conditions bioreactors, and carbon concentration needed for nitrate removal. The selected P. stutzeri I1, fluorescens 376, denitrificans Z1, PSC26, previously reported as microorganisms gene. Z1 produced fluffy, low-densi...