New technologies regarding wastewater treatment have been developed. Among these technologies, the moving bed biofilm reactor combined with membrane bioreactor (MBBR-MBR) is a recent solution alternative to conventional processes. This paper presents the results obtained from three wastewater treatment plants working in parallel. The first wastewater treatment plant consisted of a membrane bioreactor (MBR), the second one was a MBBR-MBR system containing carriers both in anoxic and aerobic zones, and the last one consisted of a MBBR-MBR system which contained carriers only in the aerobic zone. The reactors operated with a hydraulic retention time of 26.47h. During the study, the difference between the experimental plants was not statistically significant concerning organic matter and nutrients removal. However, different tendencies regarding nutrients removal are shown by the three wastewater treatment plants. In this sense, the performances in terms of nitrogen and phosphorus removal of the MBBR-MBR system which contained carriers only in the aerobic zone (67.34±11.22% and 50.65±11.13%, respectively) were slightly better than those obtained from another experimental plants. As a whole, the pilot plant which consisted of a MBR showed better performance from the point of view of the kinetics of the heterotrophic and autotrophic biomass with values of μm,H=0.00858h-1, μm,A=0.07646h-1, KM=2.37mgO2L-1 and KNH=1.31mgNL-1.
Bibliographical noteFunding Information:
The present work was developed in the framework of the Tecoagua project headed by Abengoa Water. The research was supported by the Spanish Ministry of Economy and Competitiveness and the Centre for the Development of Industrial Technology (CDTI) (Ref. CEN-20091028). The authors would like to express their most sincere thanks to the laboratory staff of the Department of Civil Engineering and the Institute for Water Research of the University of Granada for their collaboration. The research team is also grateful to the Ministry of Education, Culture and Sport of Spain for its contribution in the framework of Becas del Programa de Formación de Profesorado Universitario (FPU).
- Kinetic parameters
- Membrane bioreactor
- Moving bed biofilm reactor
- Nutrients removal
- Wastewater treatment