COD removal from synthetic wastewater using pervious concrete

The water clarification properties of pervious concrete pavements composed with varied sizes of aggregate as well as different thicknesses of pavement are studied. Removal efficiency of chemical oxygen demand from wastewater by the pervious concrete was inspected. A sets of experiments consisting of concrete compressive strength, chemical oxygen demand concentration in wastewater was done for this aim. The different sizes of gravel involved to the variation in strength improvement of the porous concrete pavement and its decontamination effectiveness. Chemical oxygen demand was considerably lowered through the voids in the pervious concrete by several processes such as filtration, absorption, and biodegradation resulting in an improvement of the COD removal efficiency. The results showed that higher removal of COD could be done when using a small size of gravel (10-20mm), pavement thickness 20cm and stimulation bacterial growth by adding the nutrients to the wastewater.