Waste water treatment agent for novel gravure note printing

Abstract

The invention relates to waste water treatment agent particular to gravure waste water, which comprises: iron coagulant 10-60%, dispersant 5-30%, defoaming agent 1-10%, cosolvent 3-5%, and water. The formulation brings well coagulate effect to ink-contained waste water from product or ultrafiltration. The mud-water can be separated by pressure filter. This agent has stable water-phase, well compatibility with waste water.

Description

technical field [0001] The invention relates to a wastewater treatment agent, in particular to a banknote printing gravure wastewater treatment agent and a treatment method. Background technique [0002] In the banknote printing process, the ink-containing wastewater formed by the wiping solution cleaning the color die roller is one of the difficulties faced by the banknote printing industry. Main components of this wiping solution: sodium hydroxide 1.0-1.2%, surfactant about 0.5%, demineralized water and other additives 98.3%-98.5%; main components of ink-containing wastewater: pigments, fillers, binders, resin oil class, surfactants and sodium hydroxide. [0003] At present, the more feasible treatment process is as follows: see Figure 1, after the ink-containing wastewater is neutralized, coagulated, and ultra-filtered, it is air-floated and finally post-treated. In the neutralization and coagulation section, about 50% sulfuric acid is basically used to adjust the pH of...

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Problems solved by technology

[0005] 2. The exothermic reaction of sulfuric acid in the process of adjusting pH is difficult to control. The violent chemical reaction will cause the overflow of waste water, seriously affect the working environment, and bring certain

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