Research Article
Unknown Inputs Nonlinear Observer for an Activated Sludge Process
Table 1
Nonlinear-model parameters.
| Parameter | Description | Value |
| | Performance coefficient of heterotrophic biomass | 0.67 |
| | Nitrogen mass in heterotrophic and autotrophic biomass concentrations | 0.080 |
| | Hydrolysis in anoxic phase correction factor | 0.8 |
| | Average saturation coefficient of ammonia for autotrophic biomass | 0.25 |
| | Average saturation coefficient of nitrate | 0.5 |
| | Average saturation coefficient of oxygen for heterotrophic biomass | 0.2 |
| | Average saturation coefficient of oxygen for autotrophic biomass | 0.4 |
| | Growth rate of heterotrophic biomass | 46.91 |
| | Autotrophic speed of nitrate production | 276.73 |
| | Hydrolysis speed of slowly biodegradable substrate by the heterotrophic | 87.54 |
| | Ammonification of soluble organic nitrogen | 1546.8 |
| | Concentration of dissolved oxygen saturation | 9.0 |
|
|