Sequencing batch reactor combined with coarse filter for domestic wastewater treatment
Keywords:SBR, Filter, Nutrient Removal, Domestic Wastewaters, Biological Treatment.
AbstractSBR is a system of treatment that relies on activated sludge and consists of a group of processes occurring in the same tank to obtain a wastewater treatment. In this study, the SBR combined with the filter has been applied to treat domestic wastewater in Basra city. The treat-ment unit consists of a domestic wastewater collection tank (250 L), an SBR tank with dimensions of (60x50x30) cm. this tank contains a mixer, diffuser for aeration, and an open hole at a height of (0.15 cm) for the discharge of treated water to the filter which consists of tank (60x70x30) cm. and two layers of gravel, the first layer with a diameter (2/5 â€“ 6/5) mm. and the second layer with a
diameter (6/5 â€“ 9/5) mm. with the thickness of 7cm for each layer. The results of removal pollutants for domestic wastewater (COD, BOD, PO4, SO4, and NO3), for SBR alone, were (93%, 93%, 52%, 10, and 65%) respectively and for SBR combined with filter for the same pollutant, the removal values were as follows (97%, 96%, 56% 29%, and 70%) respectively.
 Mamdouh Abdel-Sabour. (2000). â€œWastewater Techniques and their Reuse for Agricultural purposesâ€, Assint Journal of environmental studies, No. 19, page 33, Acting.
 Arden, E. and Lockett, W.T. (2014). â€œExperiments on the Oxidation of Sewage without the Aid of Filtersâ€, J. of the Society of Chemical Industry, Vol.33, P. 523-539. https://doi.org/10.1002/jctb.5000331005.
 Irvine, R.L.; Davis, W.B. (1971).â€ Use of Sequencing Batch Reactors for Wastewater Treatmentsâ€ CPC International, Cropus Christi, Tex-as. In proceeding of the 26th Annual Purdue Industrial Waste Conference; Purdue University: Waste Lafayette, IN, page 450.
 Goronszy, M.S. (1979). â€œIntermittent Operation of Extended Aeration Process for Small Systemsâ€, J. Water Pollute. Control Fed. 51, 274.
 Irvine, R.L, Wilderer, P. A., Fleming, H.C. (1997).â€ Controlled Unsteady State Process and Technologies an overviewâ€, Water Science and Technology, 35(1), 1-10. https://doi.org/10.1016/S0273-1223(96)00872-4.
 Irvine, R. L.; Ketchum, L. H., Jr. (1992). â€œSequencing Batch Reactors for Biological Wastewater Treatmentâ€. Crit. Rev. Environ. Control, 18, 255. https://doi.org/10.1080/10643388909388350.
 Norcross, K. L. (1992). Sequencing batch reactorssAn overview. Water Sci. Technol., 26, 2523. https://doi.org/10.2166/wst.1992.0778.
 Ketchum, L. H., Jr. (1997).â€ Design and physical features of sequencing batch reactorsâ€. Water Sci. Technol, 35 (1), 11. https://doi.org/10.1016/S0273-1223(96)00873-6.
 Hopkins, L. N.; Lant, P. A.; Newell, R. B. (2001). â€œUsing the flexibility index to compare batch and continuous activated sludge process-esâ€. Water Sci. Technol, 43 (3), 35. https://doi.org/10.2166/wst.2001.0116.
 BOD System OxiDirect Instrument Manual, 2.3 page 6.
 Clescer L., Greenberg A., Eaton A. (1999). "Standard methods for water and wastewater examinations", 20th edition, Amer Public Health Assn, ISBN-13: 978-0875532356.
 DR5000 Spectrophotometer Procedures Manual November 05 Edition 2. Germany.
LicenseAuthors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under aÂ Creative Commons Attribution Licensethat allows others to share the work with an acknowledgement of the work''s authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal''s published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (SeeÂ The Effect of Open Access).