Generally, 20 0 L of water are used in automatic wash every time a car is washed; and from 40 to 50 kL in a self-serve wash. Thus, car wash requires a big volume of water and also it generates a sig-ni ficant volume of wastewater containing various types of pollut-ants. Most of the time, the car wash wastewater is discharged into
sewer systems without any treatment.