METHOD OF TREATING RINSING WASTEWATER FROM DEVELOPING APPARATUS FOR PHOTOSENSITIVE LITHOGRAPHIC PRINTING PLATE, METHOD OF DEVELOPMENT, AND DEVELOPING APPARATUS

摘要

An object of the present invention is to provide a simple method for treatment of a washing waste liquid, which enhances the flocculation effect and also enhances filtration characteristics of a flocculated washing waste liquid in a flocculation treatment of a washing waste liquid generated in processing a photosensitive lithographic printing plate.;Disclosed is a method for treatment of a washing waste liquid generated in a processing apparatus of a photosensitive lithographic printing plate, which comprises (1) adding a cationic polymer flocculant to the washing waste liquid, then (2) adding an anionic polymer flocculant, followed by (3) filtration.