Experimental Study on the Influence of Sediment on COD Degradation

According to the characteristics of river sediment having greater impact on COD values, simulation experiment was used to explore the impact of sediment concentrations on COD, revealing the relationship between COD values and sediment. The level of sediment concentration has a more significant effect on COD degradation; higher the sediment concentration is, the greater is the rate of COD degradation. Sediment particle size also affects the rate of degradation of COD in water. With smaller particle size the rate of COD degradation is increased. This is because with the smaller particle size, the surface area is large, which in aqueous phase contaminants make it easier to achieve COD degradation.