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http://dx.doi.org/10.17137/korrae.2021.29.3.5

Evaluation of pure oxygen with MBR(Membrane Bio Reactor) process for anaerobic digester effluent treatment from food waste  

Park, Seyong (Bioresource Center, Institute for Advanced Engineering)
Kim, Moonil (Department of Civil & Environmental Engineering, Hanyang University)
Park, Seonghyuk (Department of ICT Integrated Safe Ocean Smart Cities Engineering, Dong-A University)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.29, no.3, 2021 , pp. 5-16 More about this Journal
Abstract
In this study, the applicability of the MBR(Membrane Bio Reactor) process of oxygen dissolve was evaluated through comparison and evaluation of the efficiency of oxygen dissolve device and conventional aeration device in the explosive tank within the MBR process. The organic matter and ammonia oxidation by oxygen dissolve device were evaluated, and the efficiency of persaturation was evaluated by applying real waste water (anaerobic digester effluent treatement from food waste). SCOD and ammonia removal rates for oxygen dissolve device and conventional aeration device methods were similar. However, it was determined that the excess sludge treatment cost could be reduced as the yield of microorganisms by oxygen dissolve device is about 0.03 g MLSS-produced/g SCOD-removed lower than that of microorganisms by conventional aeration device. The removal rates of high concentrations of organic matter (4,000 mg/L) and ammonia (1,400 mg/L) in anaerobic digester effluent treatment from food waste were compared to the conventional aeration device and the oxygen dissolve device organic matter removal rate was approximately 13% higher than that of the conventional aeration device. In addition, for MLSS, the conventional aeration device was 0.3 times higher than for oxygen dissolve device. This is believed to be due to the high progress of sludge autooxidation because the dissolved oxygen is sufficiently maintained and supplied in the explosive tank for oxygen dissolve device. Therefore, it was determined that the use of oxygen dissolve device will be more economical than conventional aeration device as a way to treat wastewater containing high concentrations of organic matter.
Keywords
MBR(Membrane Bio Reactor); Oxygen dissolve device; Conventional aeration device; COD(Chemical oxygen demand); Ammonia; MLSS (Mixed Liquor Suspended Solid);
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