Research Article
Improvement of Black-Odor Water by Pichia Strain GW1 under Optimized NH3-N Degradation Conditions
Table 3
Orthogonal design for NH3-N removal rate and COD removal rate.
| | No. | A | B | C | D | NH3-N removal rate (%) | COD removal rate (%) | | Concentration | Aeration | pH | Temperature |
| | 1 | 1 | 1 | 1 | 1 | 77 | (78) | | 2 | 1 | 2 | 2 | 2 | 82 | (84) | | 3 | 1 | 3 | 3 | 3 | 81 | (82) | | 4 | 2 | 1 | 2 | 3 | 80 | (84) | | 5 | 2 | 2 | 3 | 1 | 84 | (84) | | 6 | 2 | 3 | 1 | 2 | 90 | (91) | | 7 | 3 | 1 | 3 | 2 | 93 | (86) | | 8 | 3 | 2 | 1 | 3 | 84 | (77) | | 9 | 3 | 3 | 2 | 1 | 94 | (88) | | K1 | 80 (81.3) | 83.3 (82.7) | 83.7 (82) | 85 (83.3) | — | — | | K2 | 84.7 (86.3) | 83.3 (81.7) | 85.3 (85.3) | 88.3 (87.7) | — | — | | K3 | 90.3 (83.7) | 88.3 (87) | 86 (84) | 83 (81) | — | — | | R | 10.3 (5) | 5 (5.3) | 2.3 (3.3) | 5.3 (6.7) | — | — |
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