Microbial nitrate removal by waste iron shavings from the biological and catalytic ozonation treated dyeing and finishing wastewater

AMB Express

Table 2 Summary of the results from UHPLC-QTOF

	Influent	AnSBR-I	AnSBR-C
Medium or weak polar species^a	44 (8%)^b	43 (8%)	54 (9%)
Strong polar species^a	530 (92%)	504 (92%)	526 (91%)
Total species	574	547	580

^aThe species with retention time ≤2 min were regarded as strong polar species, while the species with retention time 2 min were regarded as medium or weak polar species
^bThe number in the bracket was the ratio of the species to the total species