Development of bioreactors for denitrification with immobilized cells
1997
Matsumura, M. | Tsubota, H. | Ito, O. | Wang, P.C. | Yasuda, K. (University of Tsukuba, Tsukuba, Ibaraki (Japan). Inst. of Applied Biochemistry)
Macro-porous cellulose carrier (AQUACEL) was applied for immobilization of denitrifying bacteria to develop a practical nitrogen removal system with high performance. When the immobilized cell was applied to denitrification under high nitrogen loading rate, flotation of carriers caused by the evolution of nitrogen gas resulted. To counter the problem of carrier flotation, new reactors using hydrodynamic jet flow and centrifugal force were developed. These new reactors distributed homogeneously the floating carriers, and complete denitrification was obtained even at high loading rate of 20 kg N/cu m-carrier/d. This AQUACEL system was effectively applied to denitrification of wastewater discharged from an eletroplating factory
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