In this paper, we discuss the control of the outflow quantity of a known amount of granules from a hopper. First, for the control algorithm, a model reference adaptive control algorithm extended to a nonminimum phase system by compensating zeros of the system is used. Next, the adaptive algorithm for a process with unknown deterministic disturbance is investigated using an AR model with time delay. Results show the proposed algorithm to be very useful for processes with deterministic disturbances and time variant parameters.