به صورت ثقلي از بالا و توسط تلمبه از پايين UASB مقايسه و مشكلات فاضلاب ورودي به كف دستگاه تصفيه ي

OPERATIONAL COMPARISON OF STATIC HEAD AND PUMP FEED OF WASTE WATER INTO THE UASB SYSTEM

In this paper, the quantity of up flow velocity and calculating the maximum flowrate in UASB reactor is first explained. Then the effect of velocity on distributing tubes is described. More over, the defects and the advantages of each method is discussed. In the bottom feeding method it is necessary to have an appropriate equilibrium between kinetic energy, momentum force, friction loss on length of pipe and pressure loss during fluid passing from external holes. Therefore, in order to cover the mentioned conditions, experimental relationships have been used considering a reactor with the up flow velocity of lm/hr and 6*8 m2 section, for which the number of holes, diameter and their jet direction as compared with horizon have been obtained. In the top feeding method, for a cylenderial reactor with 72m2 section and up flow