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Wastewater Treatment in Moving-Bed Biofilm Reactor operated by Flow Reversal Intermittent Aeration System

Authors: B. K. Kim, D. Chang, D. J. Son, D. W. Kim, J. K. Choi, H. J. Yeon, C. Y. Yoon, Y. Fan, S. Y. Lim, K. H. Hong


Intermittent aeration process can be easily applied on the existing activated sludge system and is highly reliable against the loading changes. It can be operated in a relatively simple way as well. Since the moving-bed biofilm reactor method processes pollutants by attaching and securing the microorganisms on the media, the process efficiency can be higher compared to the suspended growth biological treatment process, and can reduce the return of sludge. In this study, the existing intermittent aeration process with alternating flow being applied on the oxidation ditch is applied on the continuous flow stirred tank reactor with advantages from both processes, and we would like to develop the process to significantly reduce the return of sludge in the clarifier and to secure the reliable quality of treated water by adding the moving media. Corresponding process has the appropriate form as an infrastructure based on u- environment in future u- City and is expected to accelerate the implementation of u-Eco city in conjunction with city based services. The system being conducted in a laboratory scale has been operated in HRT 8hours except for the final clarifier and showed the removal efficiency of 97.7 %, 73.1 % and 9.4 % in organic matters, TN and TP, respectively with operating range of 4hour cycle on system SRT 10days. After adding the media, the removal efficiency of phosphorus showed a similar level compared to that before the addition, but the removal efficiency of nitrogen was improved by 7~10 %. In addition, the solids which were maintained in MLSS 1200~1400 at 25 % of media packing were attached all onto the media, which produced no sludge entering the clarifier. Therefore, the return of sludge is not needed any longer.

Keywords: U-City, Municipal wastewater treatment, Biological nutrient removal, Alternating flow intermittent aeration system, Reversal flow intermittent aeration system, Moving-bed biofilm reactor, CFSTR, u-Eco city

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[1] Ministry of Environment (2009) Sewerage Law enforcement partial modified legistration. Ministry of Environment.
[2] Oh, Se An, (2008), A Study on the u-City Implementation Model -Focused on the Water and Sewer Facilities, Gyeong Won University Graduate school, thesis for master degree
[3] Yoon, Ju Seong, Hwang, Jeong Min, Seo, Seok Hwan, Lee, Chang Min (2010) A case study on ubiquitous computing technology based environment monitoring/ diagnosis system, Korea Institute of industrial engineers Vol. 36, No. 4, pp. 230-242
[4] Jung, Keun Chae (2007) Strategy to build the future ubiquitous city using u-City service model, Entrue Journal of Information Technology, Vol. 6, No. 1, pp. 81-100
[5] Cho, Byung Wan (2007) Ubiquitous eco- city, Korea Society of Civil Engineering Vol. 55, No. 2, pp. 26-32
[6] Rusten, B., B. G. Hellstrom, F. Hellstrom, O. Sehested, E. Skjelfoss, and B. Svendsen (2000) "Pilo Testing and Preliminary Design of Moving Bed Biofilm Reactors for Nitrogen Removal at the FREVAR Wastewater Treatment Plant," Water Science & Technology, Vol 41, p.13.
[7] Rusten, B., M. McCoy, R. Proctor, and J. G. Siljuden (1998) "The Innovative Moving Bed Biofilm Reactors/Solids Contact Reaeration Process for Secondary Treatment of Municipal Wastewater," Water Environment Research, Vol. 70, p. 1083.
[8] Rusten, B., Hem, L. J., and Odegarrd, H. (1995) "Nitrification of Municipal Wastewater in Moving Bed Biofilm Reactors," Water Environment Research, Vol. 67, pp. 75-86.