The Effect of Packed-beds on Residence Time Distribution and Hydraulic Behavior of Plug Flow Reactor

There are several studies about this subject and also several hydraulic models that have been applied to predict hydraulic behaviour of biological and non-biological packed bed (filter) reactors. Fluid dynamics play an important role in the efficiency of the reactor. With the increasing wastewater problem in the environment there is a need of a reactor which can reveal good results in less time packed-bed. So, the aim of this study was to check the influence of the flow packed-bed in Plug Flow Reactor (PFR) by applying conditions, aeration and non-aeration in the presence of a different type of packed-beds. This reactor consists of a collector tube having storage capacity up to 30 L, in which there are 5 Pyrex glass-tubes and 3 different types of packed-beds linked in an arrangement, the portrayal of the reactor is influenced utilizing of residence time distribution RTD with the effect of aeration and no aeration. Pulse method was used to introduce the tracer inflow. From the consequences of the RTD, Peclet number (Pe) and dispersion coefficient (Da) can be calculated. Peclet number qualities are estimating range from 0.5 to 24, and the values for dispersion coefficient Da are low in the vicinity of 1.8 × 10-3 and 8.7 ×10-5 m2/s. Knowledge of these qualities guides us to give a suitable stream display. Results showed that packed-beds affect the fluid to increase the processing time, so this method can use for the treatment of water at initial levels. Experimental results also showed that while using the packed-bed made of polyester is good to increase the processing time of fluid in the reactor within the non-aeration condition and Polyurethane's packed-bed is more affected to use in aeration conditions due to the difference in their porosity.