Evaluation of anaerobic and anoxic reactors installed in serial to treat fish tank effluent

Effluent from a fish tank with Nile tilapia (Oreochromis niloticus) was treated in system of two parallel fixed-bed anaerobic reactors followed by suspended stirred, anoxic reactor for solids, organic matter and nitrogen removal. Microbial community structure compared between the an enriched anammox culture originated sludge using PCR (Polymerase Chain Reaction) DGGE (Denaturing Gradient Gel Electrophoresis) techniques. analysis revealed three large microbial clusters, namely, biomass inoculum, growing reactors, culture. The similarity recovered considered low (32.7%), suggesting differentiation bacterial as function selection specific groups. last step had worsened effluent quality. potential ammonia removal single demonstrated.