Hello Sanjav, back in the 90s ...
Published by Tiziano Zampollo, Senior Partner at Water Engineers & Consultants - WEnCo
Hello Sanjav, back in the 90s our Company used to sell compact physical-chemical units to treat Auto Wash effluents. Later I discovered the difference between Tunnel Washes , Self Serve Car washes and their relevant effluents (and treatments).
HTH
HTH