| i |
NA |
Index of the facultative pond |
| k |
[day] |
index of periodic review time instant, without loss of generality, we assume one periodic review time to be one day; |
|
[kg] |
The amount of wastewater entering the facultative pond i (kg/) at the periodic review time k; |
|
[day] |
Duration of the wastewater processing on the facultative pond i at the periodic review time k. |
|
[mg/L] |
The concentration of the biological oxygen demand in the wastewater that processed on the facultative pond i at the periodic review time k; |
|
[%] |
The efficiency index value of the treatment on the facultative pond i at the periodic review time k; |
|
[mg/L] |
The upper bound of the concentration of the biological oxygen demand in the processed wastewater before leaving the facultative ponds; |
|
[m3/day] |
A fuzzy variable which represents the wastewater amount before entering the facultative pond i at the periodic review time k; |
|
[kg/day] |
A fuzzy variable that represents the wastewater load before entering the facultative pond i at the periodic review time k; |
|
[%] |
A fuzzy variable that represents the biological oxygen demand's degradation rate at the periodic review time k. |
