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This study employed a laboratory-scale continuous upflow bio-contact oxidation reactor to treat 50 L/day of municipal wastewater in Al Rumaitha City, located north of Al Muthanaa Province in Iraq. The reactor configuration consisted of two anoxic-aerobic reactors nested inside each other, with a 1:3 volume ratio of anoxic to aerobic zones. Both the anoxic and aerobic reactors were loaded with K1 bio-media, filling them to 50% capacity for fixing and preserving the biomass. The reactors were operated in a mode that achieved full nitrification-denitrification without any sludge return, relying solely on internal recycling from the aerobic to the anoxic reactor. After biofilm formation on the carriers, three distinct hydraulic retention times (HRTs) were investigated – ranging from 24 to 12 hours – to evaluate their impact on removing biological nutrients from municipal sewage. In this operational approach, the preferred internal recycle ratio and gas/water ratio for effective nitrogen removal were a complete feed rate recycle of 100% and a ratio of 1:5, respectively. The experiment results highlighted that a 24-hour hydraulic retention time was most suitable for the simultaneous removal of organic carbon (COD) and nutrients. During this period, average removal efficiencies were found to be 93.51% for COD, 94.50% for ammonium (NH4+), 60.98% for total nitrogen (TN), and 67.57% for total phosphorus (TP). Furthermore, the aerobic bio-contact oxidation reactors maintained an average dissolved oxygen (DO) concentration of 4.89 mg/L. In contrast, the anoxic bio- contact oxidation reactors exhibited a lower average DO concentration of 0.38 mg/L.
Czasopismo
Rocznik
Tom
Strony
304--318
Opis fizyczny
Bibliogr. 47 poz., rys., tab.
Twórcy
autor
- Department of Civil Engineering, College of Engineering, University of Basrah, Basrah, Iraq
autor
- Department of Civil Engineering, College of Engineering, University of Basrah, Basrah, Iraq
autor
- Department of Civil Engineering, College of Engineering, University of Basrah, Basrah, Iraq
Bibliografia
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- 16. Helness H. 2007. Biological phosphorous removal in a moving bed biofilm reactor. Ph.D. Thesis, Norwegian University of Science and Technology, Norway
- 17. Ibrahim H.T., Qiang H., Al-Rekabi W.S. 2014. Effect of Gas/Water Ratio on the Performance of Combined Cylindrical Anoxic/Aerobic Moving Bed Biofilm Reactors for Biological Nutrients Removal from Domestic Wastewater by Fully Nitrification-Denitrification Processes. Research Journal of Applied Sciences, Engineering and Technology 7(13): 2655-2666.
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- 25. Melin E., Leiknes T., Helness H., Rasmussen V., Ødegaard, H. 2005. Effect of organic loading rate on a wastewater treatment process combining moving bed biofilm and membrane reactors. Water Science & Technology, 51(6–7), 421-430.
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- 31. Ødegaard H., Rusten B., Wewwman F. 2004. State of the art in Europe of the moving bed biofilm reactor (MBBR) process. Paper presented in WEFTEC’04 in New Orleans, 4th October.
- 32. Qiqi Y., Qiang H., Ibrahim H.T. 2012. Review on Moving Bed Biofilm Process. Pakistan Journal of Nutrition, 11(9), 706-713.
- 33. Reis G.G. 2007. Influência da carga orgânica no desempenho de reatores de leito móvel com biofilme (MBBR). Dissertation (Master in Chemical Engineering Sciences), Federal University of Rio de Janeiro, Rio de Janeiro (in Portuguese).
- 34. Rusten B., Eikebrokk B., Ulgenes Y., Lygren E. 2006. Design and operations of the Kaldnes moving bed biofilm reactors. Aquacultural Engineering, 34, 322-331.
- 35. Rusten B., Mccoy M., Proctor R., Siljudalen J.G. 1998. The innovative moving bed biofilm reactor/solids contact reaeration process for secondary treatment of municipal wastewater. Water Environment Research, 70(5).
- 36. Rusten, B., Matsson, E., Broch-due, A., Westrum, T., 1994. Treatment of pulp and paper industry wastewater in novel moving bed biofilm reactors. Water Science and Technology, 30(3), 161-171.
- 37. Salvetti R., Azzellino A., Canziani R., Bonomo L. 2006. Effects of temperature on tertiary nitrification in moving-bed biofilm reactors. Water Research, 2981-2993.
- 38. Shore J.L., M’Coy W.S., Gunsch C.K., Deshusses M.A., 2012. Application of a moving bed biofilm reactor for tertiary ammonia treatment in high temperature industrial wastewater. Bioresource Technology, 112, 51–60.
- 39. Sousa J.T., Foresti E. 1999. Environmental management and control. Use of anaerobic sludge as external carbon source of denitrification of wastewaters. Brazilian Journal of Agricultural and Environmental Engineering, 3, 69-73. Campina Grande/Paraíba: DEAg/UFPB, 1999 (In Portuguese).
- 40. State Environmental Protection Administration, 2002. Water and Wastewater Monitoring and Analysis Methods. 4th Edn., China Environmental Science Press, China.
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- 42. Von Sperling M. 2007. Biological Wastewater Treatment Series: Activated Sludge and Aerobic Biofilm Reactors. 1ª ed., Editora IWA Publishing, Londres.
- 43. Wang J., Yang N. 2004. Partial nitrification under limited dissolved oxygen conditions. Process Biochem., 39: 1223-1229.
- 44. Wang R.C., Wen, X.-H.; Qian, Y. 2005. Influence of carrier concentration on the performance and microbial characteristics of a suspended carrier biofilm reactor. Process Biochemistry, 40(9), 2992–3001.
- 45. Xu S., Wu D., Hu Z. 2014. Impact of hydraulic retention time on organic and nutrient removal in a membrane coupled sequencing batch reactor. Water Research, 55: 12-20.
- 46. Zafarzadeh A., Bina B., Nikaeen M., Attar H.M., Nejad M.H. 2010. Performance of moving bed biofilm reactors for biological nitrogen compounds removal from wastewater by partial nitrification-denitrification process. Iran J Environ Health Sci Eng 7(4): 353.
- 47. Zilli R.P. 2013. Influence of hydraulic retention time and surface air velocity on the performance of a moving bed reactor with attached biofilm (MBBR). Thesis of Master in Chemical Engineering, Federal University of Santa Catarina, Florianopolis, p. 39.
Uwagi
Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-f7d964b4-8624-4009-8a92-d8552833685d