Method for printing and dyeing wastewater purification treatment in different steps

A technology for printing and dyeing wastewater, purification and treatment, applied in water/sewage treatment, chemical instruments and methods, light water/sewage treatment, etc. High cost and other problems, to achieve the effect of increasing mechanical strength and stability, low price and fast speed

Inactive Publication Date: 2018-08-31
许欠欠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From a technical point of view, these high-end technologies can completely solve the problem of removal of refractory COD, metals and inorganic salts in printing and dyeing wastewater. Small enterprises cannot afford the high cost brought by the treatment process
Therefore, the application of high-end technology will inevitably bring about the problem of increased investment and operating costs, which is not suitable for printing and dyeing enterprises with low profit margins

Method used

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  • Method for printing and dyeing wastewater purification treatment in different steps

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Effect test

Embodiment 1

[0030] A method for step-by-step purification of printing and dyeing wastewater, the method comprising the steps of:

[0031] Step 1. Multi-media filtration: the effluent after the process of passing through the grille, adding coagulant for coagulation and sedimentation, anaerobic hydrolysis and aerobic aeration tank passes through the multi-media filter layer from top to bottom; the filter medium is: the upper layer is Anthracite, particle size 1mm, layer height 400mm, lower layer is quartz sand, particle size 0.5mm, layer height 800mm, flow velocity 8m / h; described coagulation precipitation step adds coagulant, and the composition of described coagulant is as follows: phenolic 6 parts of resin, 5 parts of nano zinc oxide, 4 parts of sodium lignosulfonate, 3 parts of carbon nanotube, 3 parts of activated carbon fiber, 3 parts of starch, 2 parts of organic montmorillonite, 2 parts of diatomite, pyrrhotite 2 parts, 2 parts of maghemite, 2 parts of ferromanganese permanent magne...

Embodiment 2

[0046] A method for step-by-step purification of printing and dyeing wastewater, the method comprising the steps of:

[0047] Step 1. Multi-media filtration: the effluent after the process of passing through the grille, adding coagulant for coagulation and sedimentation, anaerobic hydrolysis and aerobic aeration tank passes through the multi-media filter layer from top to bottom; the filter medium is: the upper layer is Anthracite, particle size 2mm, layer height 400mm, lower layer is quartz sand, particle size 1mm, layer height 800mm, flow rate 12m / h; described coagulation precipitation step adds coagulant, and the composition of described coagulant is as follows: phenolic resin 8 parts, 8 parts of nano zinc oxide, 8 parts of sodium lignosulfonate, 7 parts of carbon nanotubes, 6 parts of activated carbon fiber, 5 parts of starch, 5 parts of organic montmorillonite, 5 parts of diatomite, 3 parts of pyrrhotite 3 parts, 3 parts of maghemite, 3 parts of ferromanganese permanent m...

Embodiment 3

[0062] A method for step-by-step purification of printing and dyeing wastewater, the method comprising the steps of:

[0063] Step 1. Multi-media filtration: the effluent after passing through the grid, adding coagulant for coagulation and sedimentation, anaerobic hydrolysis and aerobic aeration tank process passes through the multi-media filtration layer from top to bottom. The filter medium is: the upper layer is anthracite, the particle size is 1.5 mm, and the layer height is 400 mm; the lower layer is quartz sand, the particle size is 0.7 mm, the layer height is 800 mm, and the flow rate is 10 m / h; The composition of the coagulant is as follows: 7 parts of phenolic resin, 6 parts of nano-zinc oxide, 6 parts of sodium lignosulfonate, 5 parts of carbon nanotubes, 4 parts of activated carbon fiber, 4 parts of starch, 3 parts of organic montmorillonite, diatomaceous earth 3 parts, 2.5 parts of pyrrhotite, 2.5 parts of maghemite, 2.5 parts of ferromanganese permanent magnetic m...

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Abstract

The invention discloses a method for printing and dyeing wastewater purification treatment in different steps. The method comprises the following steps: I, filtering with multiple mediums; II, performing visible light catalytic oxidation; III, filtering with a micro-filtration membrane; IV, filtering with an amphoteric ion-exchange resin. By adopting the treatment method disclosed by the invention, sewage can be purified step by step, that is, the sewage is treated with processes of grids, coagulating sedimentation, anaerobic hydrolysis and aerobic aeration tanks, and printing and dyeing wastewater effluent is fed through a multi-medium filtering layer from top to bottom; large-size garbage is firstly removed through the grids, further through coagulating sedimentation, impurities which can be relatively easily settled down are removed, meanwhile, decoloring is achieved, and further purification is carried out through the multi-medium filtering layer, so that the method has the advantages of high efficiency and environment protection.

Description

technical field [0001] The invention relates to a treatment method for printing and dyeing wastewater, in particular to a step-by-step purification treatment method for printing and dyeing wastewater. Background technique [0002] Printing and dyeing wastewater has the characteristics of large discharge volume, complex composition, high organic content, deep color, high chemical oxygen demand and poor biodegradability. In recent years, with the technological progress and continuous innovation of the printing and dyeing industry, the use of raw materials for chemical synthesis has greatly increased, making the quality of printing and dyeing wastewater more complex. Printing and dyeing wastewater contains a large amount of slurry, dyes, auxiliaries, and surfactants, which greatly increases the difficulty of treatment. Direct discharge of it will bring great harm to human health and living environment, and cause waste of water resources. [0003] The chromaticity in printing a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F9/00C02F1/001C02F1/30C02F1/42C02F1/444C02F1/56C02F1/725C02F3/30C02F2101/308
Inventor 许欠欠
Owner 许欠欠
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