Fig. 1: Performance and analysis of microbial community of reactors.

Pollutant removal performance of (a) R1 and (b) R2 during the start-up stage. c Analysis of microbial community in R1 at phylum level from 16S rRNA amplicon sequencing data. d The gene abundance of anammox-16S rRNA gene in R1. Analysis of microbial community in R2 at (e) phylum and (f) genus levels from 16S rRNA amplicon sequencing data.