Table 1.

Reactor operation phases and associated operational conditions.

Phase	1	2	3	4	5
Days	0–104	105–259	260–559	560–665	666–889
HRTa	48	36	24	18	12
TEMPb	12	12	12	12	12
OLRc	0.25	0.33	0.5	0.63	1
VLRd	0.5	0.67	1	1.33	2
SLRe	0.03	0.03	0.05	0.06	0.1
SLRf	0.01	0.02	0.03	0.03	0.05
UVg	2.5	2.5	2.5	2.5	2.5

^aTemperature (°C).

^bHydraulic retention time (h).

^cOrganic loading rate (kg COD m⁻³ d⁻¹*.

^dVolumetric loading rate (m³ Wastewater m⁻³ Reactor d⁻¹).

^eSludge loading rate (kg COD kg[VSS]⁻¹ d⁻¹)*.

^fSludge loading rate (m³Wastewater kg[VSS]⁻¹ d⁻¹).

^gUp-flow velocity (m h⁻¹). *Values calculated based on influent concentration of 500 mg l⁻¹ COD_Tot.