high temperatures which were 30 C, 40 C and 50 C demonstrated
positive results to obtain stable granules with excellent
nutrients removal performances. Establishment of organics, biological
phosphorus and nitrification required short period of time
for the acclimatization phase due to the change of circumstances
(e.g. the composition of synthetic domestic wastewater and the
operation mode of SBR). However, considering the inoculation
sludge used in this research was taken from wastewater treatment
plant (WWTP) located in the Madinah city, Saudi Arabia with daytime
temperatures averaging about 40–50 C and nights about
28 C, it was an advantage that the inoculum sludge used was
well-adapted to high temperatures. This shortened the time
needed for the system to achieve stable removal performances.