SISTEM BY PASS DAN RECYCLE PADA OPERASI TEKNIK KIMIA

One of the more common processing configurations is the material recycle structure. These are particularly useful for reactors, where they allow better control of reactor selectivity when multiple reactions occur.
When we study recycle systems, we are often asked to calculate the recycle ratio. Usually, this is found by dividing the mass flow of the recycle stream by the mass flow of the "fresh feed" entering the system. In the industrial world, recycle ratios have important consequences for system performance and operating costs.

A common recycle structure is the reactor/separator which is used to recover unreacted material and return it to the reactor. The "separator" may be a single piece of equipment or it may be an entire process on its own.
A related process structure is the bypass system

One use of bypass is to obtain precise control of the output stream, as when a small wet air stream bypasses a drier so that the output humidity can be regulated.