%0 Journal Article %A Shahandeh, Nadiya %A Jalilzadeh Yengejeh, Reza %T Efficiency of SBR Process with a Six Sequence Aerobic-Anaerobic Cycle for Phosphorus and Organic Material Removal from Municipal Wastewater %J Iranian Journal of Toxicology %V 12 %N 2 %U http://ijt.arakmu.ac.ir/article-1-638-en.html %R 10.29252/arakmu.12.2.27 %D 2018 %K Environment, Phosphorus, SBR, Wastewater, %X Background: Various chemical, physical and biologic treatment methods are being used to remove nitrogen and phosphorus from wastewater. Sequencing batch reactor (SBR) is a modified activated sludge process that removes phosphorus and organic material from sanitary wastewater, biologically. Methods: This study was conducted in 2016.The performance of an aerobic-anaerobic SBR pilot device, located at Ahwaz West Wastewater Treatment Plant, Ahwaz, southern Iran in phosphorus and organic material removal was evaluated to determine the effect of the aerobic-anaerobic step time on the efficiency of nitrogen and phosphorus removal, the effect of changing the sequence of steps and the effect of time ratio on phosphorus removal efficiency. A reactor of 8 L was used. Influent contained 397 and 10.7 mg/l COD and phosphorus, respectively. The pilot plant started with a 24 h cycle including four cycles of 6 h, as follows: 1- Loading (15 min), 2-Anaerobic (2 h)-Aerobic (2 h), 3- Settling (1 h), Idleness (30 min) and 5- decant (15 min). Results: After reaching steady conditions (6 months), Removal percentages of phosphorus, BOD5, COD, and TSS in The SBR over a period of 6 months was 79%, 86%, 89% and 83%, respectively. Conclusion: Result of this study can be used for designing and optimum operation of sequencing batch reactors. %> http://ijt.arakmu.ac.ir/article-1-638-en.pdf %P 27-32 %& 27 %! %9 Research %L A-10-483-1 %+ Department of Environmental Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran. %G eng %@ 2008-2967 %[ 2018