WATER- AND CHEMICAL RECYCLING
Process and equipment for partial but substantial closing of the water and chemical cycle at inter alia automatic automobile washing machines. The wash water, which when used becomes loaded with oil and heavy metals and contains tensides, complexing agents and possibly solvents, is treated by adding breaking and precipitating chemicals, sedimentation and filtration. The main part of water and chemicals can be reused. Fresh water is needed for the final rinsing only.