The evaluation of pumice stone applicability at struvite crystallization by using Box-Benhken Experimental Design

This paper presents the results on phosphorus recovery from a phosphorus rich synthetic solution using pumice stone as a seed material. The factors affecting the precipitation mechanism as struvite for phosphorus recovery were investigated using a model reactor. The experimental setup is composed of the model reactor, three injection tubes, a pH-probe, a temperature sensor, two stirrers, and feeding tank.