Table 2.

Characteristics of metagenomic reads before and after quality filtering derived from DNA extracted from the four biogas reactors and their inoculum

Metagenome	Raw dataset	Filtered dataset
	Number of reads	Number of reads	Reads (%)	Mean sequence length (bp)	Mean GC ratio (%)
R1	245499	177017	72.10	413	43.08
R2	548434	390641	71.23	417	42.86
R3	182122	130610	71.72	410	43.75
R4	286008	205035	71.72	413	43.65
IN	241804	172150	71.19	409	43.10