Comparison of the purification performance and microbial community functional diversity in flow-directional-switching and unidirectional-flow biotrickling filters

Figures & data

Figure 1. Schematic of FDS and UF biotrickling filters.

Figure 2. Effect of inlet loadings on elimination capacity of FDS and UF biotrickling filters.

Figure 3. Elimination capacity of different packed bed sections in FDS and UF biotrickling filters: (a) section I; (b) section II; (c) section III.

Figure 4. The average well color development (AWCD) of different packed bed sections in FDS and UF biotrickling filters: (a) section I; (b) section II; (c) section III.

Table 1. Microbial community diversity index of different biofilms along the packed media in FDS and UF biotrickling filters

System	Section	S	H’	U
UF biotrickling filter	III	13.67 c	2.948 c	4.000 e
	II	19 b	3.097 b	4.169 d
	I	20 ab	3.101 b	4.320 c
FDS biotrickling filter	III	20.33 a	3.142 a	5.841 a
	II	20 ab	3.109 b	5.405 b
	I	20 ab	3.138 a	5.817 a
Notes: Indices were calculated based on the optical density values of 60 hr of incubation, and means within a column followed by the same letter(s) were not significantly different (P > 0.05).