Subject area	Biology
More specific subject area	Biological wastewater treatment
Type of data	Table, graph and metagenomic sequences
How data was acquired	DNA sequencing using Illumina HiSeq. 2000 platform
Data format	Raw and filtered
Experimental factors	DNA extracted from activated sludge
Experimental features	Activated sludge was taken from an aeration tank of a full-scale WWTP in Beijing (China). Metagenomic sequencing was performed using Illumina HiSeq. 2000 platform according to the recommendations of the manufacturer.
Data source location	Beijing, China
Data accessibility	Data about community structure and function annotation are available with this article. The sequencing data have been deposited in MG-RAST (project ID: mgm4735473.3)[2].