a master's thesis in the College of Engineering at the University of Basrah discussed (Sequencing Batch Reactor Combined with Coarse Filter for Domestic Wastewater Treatment}

The thesis presented by the student Hameedah Mohammed Maatoq dealt with the study of the sequence batch reactor system, one of the most effective wastewater treatment systems.

An experimental SBR scale was constructed. The components of this unit are a sedimentation tank for domestic wastewater and a reactor. This reactor consists of a ventilation tube, a mixer, a panel to control the operation and stopping of ventilation and mixing units, Mixing, sedimentation, exit of treated water

An experimental scale SBR was constructed. The components of this unit are a sedimentation tank for domestic wastewater and a reactor where this reactor consists of a ventilation tube, a mixer, a panel to control the operation and stopping of ventilation and mixing units, a coarse filter consisting of a glass tank consisting of two layers of gravel the biological treatment process is affected by the temperature of water Drainage: High temperature, increase of bacterial reproduction and growth rate and oxidation rate of organic matter by aerobic bacteria

The thesis aims to define an appropriate control strategy to achieve the most efficient operation of the local wastewater treatment plant in Basrah city together with the filter

The thesis concluded that a decrease in the pH of less than 6 leads to the growth of filamentous organisms and fungi in the aeration basins, which reduces the speed of sedimentation and buoyancy of sludge in the final sedimentation basins and their exit from the final runoff, which reduces the efficiency of biological treatment. The system showed that the removal efficiency of NO3, SO4, PO4, BOD, COD was 65,10,52,93,93. Respectively, the removal efficiency of the system with the filter for the same pollutant was 70,29,56,96,97, respectively