Microorganism community of activated sludge sample Z1  from oxidation ditch
Total genomic DNA from the sample was extracted using the FastDNA SPIN Kit for Soil and V4 region of 16S rRNA gene was amplified using primers 515F and 806R. The PCR products were sequenced using the Illumina MiSeq platform and the obtained sequences were quality filtered, denoised and chimera checked using QIIME v.1.7.0. and finally phylogenetically assigned to taxonomic classifications with Greengenes 16S rRNA gene database using UCLUST v1.2.22q.