Modelling of hybrid moving bed biofilm reactors: a pilot plant experiment.

摘要

In recent years there has been an increasing interest in the development of hybrid biofilm reactors,udespecially in the upgrading of existing WWTP that are no longer able to respect concentration limits. In fact,udtoday’s challenge is the achievement of a good aquatic state for the receiving water bodies according to theudWater Framework Directive requirements, which indeed limit even more the continuous emissions, i.e.udcoming from WWTP. This paper presents the setting up of a mathematical model for the simulation of audhybrid MBBR system; the model calibration/validation has been carried out considering a field gatheringudcampaign on an experimental pilot plant. The main goal is to gain insight about MBBR processes attemptingudto overcome main shortcomings in particular referring to the modelling aspects. The model is made up ofudtwo connected sub-models for the simulation of the suspended and attached biomass. The model is mainlyudbased on the concepts of the activated sludge model No. 1 (ASM1) for the description of the biokineticudprocess both for the suspended and for the attached biomass. The results show a good agreementudbetween predicted and observed values both for the attached and for the suspended biomass moreoverudthey are encouraging for further researches.