Today, because of the growing population and shortage of drinking water the use of recycled water has grown substantially. The use of biological processes is one of the effective methods in wastewater treatment, so we can discharge effluent into the environment without problem or used in agriculture. The important thing in these systems is the knowledge accurate and correct understanding of the biological process that we used. In this study, the removal of nutrients studied by using aerobic biological process with combined growth to determine the advantage of this process in industrial wastewater treatment with average load of organic compounds. In order to this study a control pilot considered with the same conditions in different hydraulic retention time. In this study, two biological reactors in a pilot scale with batch feeding regimen were studied for treatment the industrial wastewater with low COD to BOD5, evaluate and compare the performance of the process in different condition. In order to analyze twelve dependent parameter tested and studied. Results were compared for the hydraulic retention time of 6, 9 and 12 hours. This review showed that MBBR reactor has a better efficiency in removal of chemical oxygen demand required (COD), total nitrogen (TN) and phosphate (PO 4 ) than aerobic activated sludge bioreactor (pilot control). In this study, the effect of COD removal of wastewater was considered as a main factor affecting the performance treatment to remove nutrients. In a batch system, the highest removal efficiency of hydraulic retention time for 12 hours obtained 85, 94, 68/25, 37 and 89 percent, respectively, for removal of BOD, COD, TN, PO 4 and TSS. Keywords : AerobicWastewaterTreatment, IndustrialWastewater, BatchBioreactor, Hydraulic Retention Time, Nutrients Removal.