Active turquoise blue dye production wastewater reclamation process

Abstract

The invention discloses an active turquoise blue dye production wastewater reclamation process, which comprises the following steps: (1) directly transferring dye wastewater which is no more than 50 times in chromaticity to a wastewater collection tank, feeding dye wastewater which is more than 50 times in chromaticity to a decolorizing pool, physically decolorizing the dye wastewater in the decolorizing pool, and transferring the processed dye wastewater into the wastewater collection tank once again; (2) adding the dye wastewater in the wastewater collection tank of the step (1) into a neutralization kettle, and slowly adding lime milk while stirring uniformly; and stopping reaction when pH value is 7.0-8.5; (3) filter-pressing through a filter press to obtain filtrate I and a filter cake I; (4) adding the obtained filtrate I to a replacement kettle, and adding sodium carbonate for a replacement reaction; and (5) filter-pressing materials in the replacement kettle of the step (4) through the press filter to obtain filtrate II and a filter cake II. The wastewater processed by the process can be completely reclaimed for production of active turquoise blue dye, thus realizing a goal of clean production in a dye production process.

Description

technical field

[0001] The invention relates to a process for recycling reactive turquoise dye production wastewater. Background technique

[0002] In the process of dye synthesis and production, a large amount of mother liquor wastewater and washing wastewater will be produced. Because of its high COD value and chroma, if it is discharged directly without treatment, it will cause damage to the ecological environment of the water body and seriously pollute the environment. At present, many literatures have reported the treatment technologies of dye production wastewater, such as adsorption decolorization method, catalytic oxidation method, biochemical method, iron-carbon micro-electrolysis method, etc. These methods have achieved certain effects on the treatment of dye wastewater, but the wastewater has not been recycled. Wastewater recycling is particularly important in areas where water is scarce, and there is no report on the recycling of reactive turquoise dye productio...