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Comparative kinetics of hybrid and pure moving bed reactor-membrane bioreactors

Author:
Leyva-Díaz, J.C., Martín-Pascual, J., Muñío, M.M., González-López, J., Hontoria, E., Poyatos, J.M.
Source:
Ecological engineering 2014 v.70 pp. 227-234
ISSN:
0925-8574
Subject:
biofilm, biomass, bioreactors, nitrogen, organic matter
Abstract:
The moving bed biofilm reactor–membrane bioreactor (MBBR–MBR) is a novel solution to conventional processes. In this study, a conventional membrane bioreactor (MBR), a hybrid MBBR–MBR and a pure MBBR–MBR were compared. The hybrid MBBR–MBR contained suspended and attached biomass, while the pure MBBR–MBR mainly had attached biomass. The reactors operated with a hydraulic retention time of 9.5h. The pure MBBR–MBR had the highest efficiency of nitrogen removal with a value of 71.91±16.04%. As a whole, the pure MBBR–MBR showed the best performance from the point of view of the kinetics of the heterotrophic and autotrophic biomass with values of μm,H=0.018h−1, μm,A=0.751h−1, KM=2.679mgO2L−1 and KNH=2.191mgNL−1. The presence of the attached biomass improved the organic matter and nitrogen removal in a pure MBBR–MBR system.
Agid:
5378758