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Table 3 Orthogonal design for NH4 +-N degradation

From: Isolation and characterization of Burkholderia fungorum Gan-35 with the outstanding ammonia nitrogen-degrading ability from the tailings of rare-earth-element mines in southern Jiangxi, China

No. Inoculum dose (%) Temperature (°C) pH value C/N ratio Incubation time (h) Degradation rate (%)
1 6 26 6.0 5:1 44 49.7 ± 2.3
2 6 28 6.5 10:1 48 50.8 ± 1.9
3 6 30 7.0 15:1 52 66.1 ± 1.2
4 6 32 7.5 20:1 56 59.4 ± 1.5
5 8 26 6.5 15:1 56 51.2 ± 2.2
6 8 28 6.0 20:1 52 53.7 ± 2.8
7 8 30 7.5 5:1 48 66.8 ± 2.3
8 8 32 7.0 10:1 44 51.5 ± 2.0
9 10 32 7.0 20:1 48 52.4 ± 1.1
10 10 30 7.5 15:1 44 68.6 ± 1.4
11 10 28 6.0 10:1 56 65.2 ± 1.6
12 10 26 6.5 5:1 52 51.2 ± 2.5
13 12 26 7.5 10:1 52 52.1 ± 1.4
14 12 28 7.0 5:1 56 51.8 ± 2.8
15 12 30 6.5 20:1 44 65.1 ± 2.2
16 12 32 6.0 15:1 48 53.1 ± 2.4
\(\overline{{k_{1} }}\) 56.500 51.350 55.425 54.875 59.225  
\(\overline{{k_{2} }}\) 55.800 55.975 55.325 54.900 55.775  
\(\overline{{k_{3} }}\) 59.100 66.550 55.450 59.500 55.775  
\(\overline{{k_{4} }}\) 56.275 53.800 61.475 58.400 56.900  
Range 3.300 15.200 6.150 4.625 3.450  
  1. The degradation rates are presented as mean ± standard deviation