Municipal Waste Water Treatment Using Sequencing Batch Reactor (SBR)

Abstract

The sequencing batch reactor (SBR) method was used throughout this research; the experiments were carried out at the site of the Zafaraniya (MBR) project. This system has also the advantages of low initial and performance costs. Different time periods were used in this study ranging (3-8) hours for 9 months, the tests has been conducted in the environmental laboratory of the Zafaraniya (MBR) project. The removal efficiency of PO4 from waste water depends on the change of anoxic conditions to aerobic. This efficiency is a maximum when the periods of the two types of conditions are equal; the removal of NO3 depends on food supply for micro-organisms which convert nitrates to nitrogen gas under anoxic conditions so it is change able. According to the results gained, this kind of treatment could be used to removal phosphates & nitrates from waste waters, several experiments were conducted for the process and with different times that occur in a reactor (SBR) to reach the appropriate time to remove all pollutants from the waste water. The removal ratio was achieved when the time of the anaerobic process was equal to the time of the aerobic process that followed it. High removing efficiency in the pollutants was obtained. Phosphorous and nitrate from waste water, the percentages of removal were reached at (91.3% & 98%) for PO4 and NH3 relatively.