A total of 42 bioflocculant-producing bacterial isolates (BPB), 59 heterotrophic nitrogen removal (HNR) bacterial isolates and 8 poly-Phosphate bacterial isolates were isolated from wastewater of 8 rice noodle factories of My Tho city, Tien Giang province, Mekong Delta, Vietnam. Bioflocculant-producing bacterial isolates were divided two groups: protein and polysaccharide, HNR bacterial isolates were classified in four kinds of heterotrophic ammoniaoxidizing bacteria (15 isolates), nitrite-oxidizing bacteria (15 isolates), nitrate-oxidizing bacteria (18 isolates) and heterotrophic nitrifying and denitrifying bacteria (11 isolates). The virtually complete 16S rRNA gene was PCR amplified and sequenced. The sequences from the selected BPB, HNR and poly-P bacterial isolates showed high degrees of similarity to those of the GenBank references strains (between 97% and 99%). Phylogenetic trees based on the 16S rDNA sequences displayed high consistency, with nodes supported by high bootstrap (1000) values. These presumptive HNRB isolates were divided two groups that included members of genera belonged to Gram-positive bacteria phylum and Proteobacteria phylum while BPB and poly-P bacteria strains belonged to bacilli.