Complex sentence: Chemical oxidation may remove some persistent organic pollutants and concentrations remaining after biochemical oxidation.Disinfection by chemical oxidation kills bacteria and microbial pathogens by adding ozone, chlorine or hypochlorite to wastewater.
Split into simpler sentences: Chemical oxidation may remove some persistent organic pollutants and concentrations remaining after biochemical oxidation. Weber, pp.363-408 Disinfection by chemical oxidation kills bacteria and microbial pathogens by adding ozone, chlorine or hypochlorite to wastewater.