In industrial scale, wastewater treatment is always highly concerned in the
sake of environmental protection. A considerable effort has been made into exploring
and implementing new methods of wastewater treatment. The principle way to
remove the pollutants from wastewater is by combining different treatment methods
in one wastewater treatment system. In some treatments, the combination of
physical, chemical and biological methods are required to achieve high removal
efficiency of pollutants. As an example of these combinations, chemical oxidation
and coagulation flocculation process was recently used to remove the
nonbiodegradable pollutants from wastewater.