Table 2.
Microbial community richness and diversity indices for sludge samples collected from different wastewater treatment plants.
| Sampling Date | Sludge Sampling Site | OTU | ACE | Chao1 | Shannon | Simpson |
|---|---|---|---|---|---|---|
| D-WWTP | 873 a | 956 a | 985 a | 5.694 b | 0.007 c | |
| November. | Y-WWTP | 759 b | 864 b | 871 b | 5.344 c | 0.010 a |
| Z-WWTP | 888 a | 945 a | 957 a | 5.763 a | 0.008 b | |
| D-WWTP | 962 a | 1010 a | 1020 a | 5.271 c | 0.024 a | |
| September. | Y-WWTP | 921 b | 989 a | 1022 a | 5.372 b | 0.011 b |
| Z-WWTP | 968 a | 1007 a | 1017 a | 5.612 a | 0.010 b |
a, b, and c: multiple mean comparisons using alphabetic labels, where a > b > c. Different letters indicate significant differences at 0.05.