project for wastewater treatment system Introduction to physical and chemical wastewater treatment process were already physical installation centrifugation sediment (Centrifuge). (Figure 2.11) and chemical, by adjusting the pH and precipitation (Figure 2.5) (Figure 2.6) before discharge to the conduit for the therapy of industrial wastewater treatment system center of Hemaraj Eastern Industrial Estate (map TA phut) vent to public waterways.