عنوان مقاله [English]
There are some problems regarding this industry such as high water consumption, wastewater treatment and recycling. In this study, stone-cutting industry recycling and reuse by using hydrocyclone in different operational conditions have been investigated. The effect of operational parameters such as pressure drop and suspension concentration on separation efficiency of two kinds of hydrocyclone with different geometries in experimental conditions have been investigated. Experiments designed with response surface methodology (RSM), CCD model by using of Design Expert software. Travertine powder particles with particle size less than 200 μm was used and particles size was measured by using of Particle Size Analysis machine, and particle shapes was imaged by SEM analysis. By increasing input pressure, the passing flow rate of hydrocyclone increased and the maximum flow rate for hydrocyclones type 1 and 2 were 203 and 268 ml/s, respectively. The results showed that the separation efficiency increases by increasing of input pressure. Analysis of results demonstrated that the best separation efficiency for hydrocyclones type 1 and type 2 were 90 % and 90.4 %, respectively. According to a comparison between hydrocyclone method and traditional method of water recycling, it is concluded that hydrocyclone method reduces the water and energy consumption in stone cutting industries and is an economical and optimum method for wastewater recycling and water reusing in stone cutting industry.