The Analysis about Pollutant Index of the Wastewater Originating from Small Vehicles Washing

The wastewater originating from small vehicles washing which comes from 30 car washing stations in Kuming is selected as research subjects and tested. The results turn to be as follows: the pollutant indexes of the car washing wastewater are chromaticity, SS, COD and LAS, which beyond the approved discharged standards of A, B, and C in varying degrees. There are differences in the same parameter values from diverse car washing stations, such as SS is up to 923 mg/L. Pollution levels of pollutants’ indexes are various and their differences are in those descending orders: Chromaticity>LAS>SS>COD. Therefore, when establishing treatment facilities, pollution levels should be specially taken into consideration. Moreover, car washing station need to consolidate managing measures and standardize the drains.