Agent for advanced treatment and recycle of printing and dyeing tail end waste water, and treatment method

Abstract

The invention relates to an agent for advanced treatment and recycle of printing and dyeing tail end waste water, and a treatment method. A technical scheme of the agent comprises diluting a first component HH-S001 at a printing and dyeing tail end secondary sedimentation tank water outlet until the concentration of the first component HH-S001 is one-fifth of an original concentration, adding the diluted first component HH-S001 into an adjustment tank, stirring by a mixer, adding 30 to 32g / m<3> of water into the adjustment tank, maintaining for 2min, stirring and diluting a second component HH-S002 until the concentration of the second component HH-S002 is one-tenth of an original concentration, adding the diluted second component HH-S002 into a reactor, adding 400 to 410g / m<3> of water into the reactor for a reaction lasting for 90 to 95min, stirring a third component HH-S003, diluting the third component HH-S003 until the concentration of the third component HH-S003 is one-five hundredth of an original concentration, adding the diluted third component HH-S003 into a stabilization tank, adding 15 to 16g / m<3> of water into the stabilization tank to carry out stabilization for 8 to 10min, feeding the third component HH-S003 obtained by stabilization treatment into a solid-liquid separator, and maintaining for 2 hours. The agent and the treatment method overcome the existing defects that the conductivity of recycled printing and dyeing water is increased; the chroma greatly exceeds a standard; and an outlet water chemical oxygen demand (COD) value is very unstable. The agent and the treatment method also overcome the existing defects that the treatment on inorganic (poly aluminum chloride) PAC and organic polymers of cationic polyacrylamide (CPAM), anionic polyacrylamide (APAM) and polyamidoamine (PAMAM) have low efficiency, greatly improve a removal rate limit of pollutants in recycled water, satisfy the requirements related to recycled water quality and treatment costs, have application values, and really realize the effects of recycle of treated water and environmental protection.

Description

technical field [0001] The invention relates to waste water treatment in the printing and dyeing industry, in particular to a medicament and a treatment method for advanced treatment and reuse of waste water at the end of printing and dyeing. Background technique [0002] my country is a big printing and dyeing country, with a wide variety of printing and dyeing varieties, a wide variety of dyes, and a variety of water treatment methods. According to the national industrial policy, enterprises must not only reuse more than 50% of the water in the middle section, but also reuse 20% of the water at the end. [0003] Before the present invention, this type of wastewater treatment method basically all adopts physicochemical+anaerobic (or hydrolytic acidification)+aerobic+secondary sedimentation, adds inorganic polymer PAC and another kind is organic polymer CPAM or APAM and PAMAM. This treatment agent is relatively advanced at present, but the chromaticity is still over 32 tim...

AI Technical Summary

Problems solved by technology

This treatment agent is relatively advanced at present, but the chromaticity is still over 32 times, the conductivity is around 1800, and the COD is 130-150, while the chromaticity of printing and dyeing water reuse is required to be 2-4 times, and the conductivity is within 450. COD is less than 80, especially if the chroma is high, the company cannot reuse it when coloring

At present, my country also has an advanced treatment process, and the treatment cost is 4-5 yuan / m 3 , because industrial tap water is 3 yuan / m 3 The treatment cost is too high, which is unacceptable to the enterprise, and even if such a high cost is spent, it cannot meet the water quality requirements of the enterprise, and it cannot solve the 20% target of the national industrial policy for water reuse, and more importantly, it is a waste of water resources. and pollute the environment

[0004] Before the present invention, PAC and organic macromolecule CPAM or APAM, PAMAM were used for terminal treatment. This type of treatment agent is easy to dissolve in water, easy to use, and the solid-liquid separation effect is also good after flocculation, and has partial decolorization. , this type of treatment agent has a certain effect on the discharge water. The reason is that it is carried out according to the discharge water index of our country. However, for the printing and dyeing reuse water, its defect is that the conductivity increases; the chromaticity greatly exceeds the standard; The COD value of the effluent is very unstable

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