In addition, wastewater is treated biologically to remove oil and regenerate water and detergent for reuse. Earlier carwash systems utilize organic solvents to remove asphalt from autos. In addition to significant solvent usage, wastewaters were discharged to the sewer system. The new technology involves the substitution of water and detergent for solvent to remove asphalt. New facility requires no solvent and the wastewaters generated by the new system are treated with oil-digesting aerobic microorganisms.
Treatment removes oil from wastewater, allowing the regeneration of water and detergent for reuse.
Information Not Provided. Clean technology fully implemented. New washing system avoids the need for organic solvent usage. Biological treatment of spent wash water allows the removal of oil contamination to provide regeneration of water and detergent. Resultant treatment sludge is non-hazardous, thereby simplifying disposal.