Efficient nitrogen removal in a pilot system based on upflow multi-layer bioreactor for treatment of strong nitrogenous swine wastewater |
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| Institution: | 1. Department of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea;2. R&D Center, Ecodigm Co., Ltd., 306 DTV Post BI, Daejeon 305-501, Republic of Korea;3. School of Mechanical and Automotive Engineering, Kookmin University, Seoul 136-702, Republic of Korea;4. Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Daejon 305-701, Republic of Korea;1. Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, E- 15782 Santiago de Compostela, Spain;2. AIMEN Technological Centre, C/Relva, 27A – Torneiros, E-36410, Porriño, Pontevedra, Spain;1. School of Civil Engineering, Wuhan University, Wuhan 430072, China;2. Central and Southern China Municipal Engineering Design and Research Institute, Wuhan 430010, China;3. School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China;1. Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, via Gaetano di Biasio 43, 03043 Cassino, Italy;2. Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, via Claudio 21, 80125 Naples, Italy;1. Penza State University, Krasnaya str., 40, 440026 Penza, Russia;2. Lomonosov Moscow State University, Leninskiye Gory, 1, Moscow 119991, Russia;3. University of York, Heslington, York YO10 5DD, United Kingdom;1. Amirkhanov Institute of Physics of Dagestan Scientific Center, RAS, Makhachkala 367003, Russia;2. Department of Chemistry, Moscow State University, Moscow 119899, Russia |
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| Abstract: | In order to prevent the toxic effect caused by high strength ammonium in a swine wastewater treatment system, a patented upflow multi-layer bioreactor (UMBR) as a pre-anoxic tank was applied to a pilot-scale plant with a treatment capacity of 5 m3/d. This plant was operated for 4 months at a high IR ratio in the range of 10–17, in order to alleviate the toxic effects caused by high strength ammonium. A computational fluid dynamic (CFD) analysis was also conducted to design and configure the rotating distributors in the UMBR. At an IR ratio of about 17, the influent NH4+-N (1169 mg N/L) was diluted to less than 80 mg N/L at the head of the UMBR, and then was completely nitrified (about 98.3%) in the aeration tank, without any inhibition caused by high strength ammonium. The nitrate at a concentration of about 58.2 mg N/L recycled from the aeration tank was completely denitrified in UMBR #1, which was operated at an actual hydraulic retention time (HRT) of 3.5 h. |
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