Treatment method of industrial printing and dyeing wastewater

A technology for printing and dyeing wastewater and a treatment method, applied in the field of industrial printing and dyeing wastewater treatment, can solve the problems of long treatment period, lack of feasibility, high cost, etc., and achieve the effect of enhanced removal capacity

Inactive Publication Date: 2017-11-17
张家港市双盈印染有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the difficult-to-treat industrial wastewater such as printing and dyeing wastewater, if the water quality after treatment is required to meet the requirements of the national environmental impact assessment level A effluent discharge standard, this is impossible to achieve in this field.
It can be seen that i

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1

[0023] A method for treating industrial printing and dyeing wastewater, including the following steps in sequence:

[0024] Step 1. Pretreatment: The industrial printing and dyeing wastewater is intercepted by the grid to intercept the fine suspended matter and floating matter into the wastewater conditioning tank, and aeration is carried out in the wastewater conditioning tank at regular intervals. The perforated aeration tube is used for aeration. The aeration time is 24 hours. Adjust the PH value of 6.5 in the wastewater regulating tank;

[0025] Step 2. Acidification treatment: Stir and mix the industrial printing and dyeing wastewater with alkaline resin for adsorption. The alkaline resin is a weak alkaline resin. The treated wastewater is discharged outside, and the weak alkaline resin is regenerated with 1% NaOH;

[0026] Step 3. Strengthen biological contact oxidation: the effluent from the acidification hydrolysis tank enters the biological contact oxidatio...

Example Embodiment

[0034] Example 2

[0035] A method for treating industrial printing and dyeing wastewater, including the following steps in sequence:

[0036] Step 1. Pretreatment: The industrial printing and dyeing wastewater is intercepted by the grid to intercept the fine suspended matter and floating matter into the wastewater conditioning tank, and aeration is carried out in the wastewater conditioning tank at regular intervals. The perforated aeration tube is used for aeration. The aeration time is 24 hours. Adjust the PH value of 7.5 in the wastewater regulating tank;

[0037] Step 2. Acidification treatment: Stir and mix industrial printing and dyeing wastewater with alkaline resin for adsorption. The alkaline resin includes a combination of weak alkaline resin and strong alkaline resin. The volume percentage of the combination of weak alkaline resin and strong alkaline resin is 0.5:1, drain the treated wastewater and regenerate the alkaline resin with 3% NaOH;

[0038] Step 3. Strengthen bi...

Example Embodiment

[0046] Example 3

[0047] A method for treating industrial printing and dyeing wastewater, including the following steps in sequence:

[0048] Step 1. Pretreatment: The industrial printing and dyeing wastewater is intercepted by the grid to intercept the fine suspended matter and floating matter into the wastewater conditioning tank, and aeration is carried out in the wastewater conditioning tank at regular intervals. The perforated aeration tube is used for aeration. The aeration time is 24 hours. Adjust the PH value of 7.0 in the wastewater regulating tank;

[0049] Step 2. Acidification treatment: Stir and mix industrial printing and dyeing wastewater with alkaline resin for adsorption. The alkaline resin includes a combination of weak alkaline resin and strong alkaline resin. The volume percentage of the combination of weak alkaline resin and strong alkaline resin is 1.5:1, drain the treated wastewater and regenerate the alkaline resin with 2% NaOH;

[0050] Step 3. Strengthen bi...

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PUM

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Abstract

The invention discloses a treatment method of industrial printing and dyeing wastewater. The treatment method sequentially comprises the steps as follows: pretreatment, acidizing treatment, reinforced bio-contact oxidation and deep treatment. Wastewater subjected to biological treatment enters a secondary sedimentation tank for sludge and water separation, and separated wastewater is subjected to deep treatment. The COD of effluent can be controlled at 50 mg/L or below through treatment with weak base resin or combined treatment with weak base resin and strong base resin, the problem that the low-concentration industrial printing and dyeing wastewater treatment process is complex at present is solved, and the effluent can reach the emission or reuse requirement.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a treatment method for industrial printing and dyeing wastewater. Background technique [0002] my country is a big country in the textile industry. It uses plant fibers such as cotton and hemp, animal fibers such as wool and silk, and various synthetic fibers to produce and process various textiles for the market. In addition to fibers, the production raw materials also include dyes, resins, surfactants, acids, alkalis and other printing and dyeing raw materials. There are many processes in the printing and dyeing process, which will produce desizing wastewater, scouring wastewater, bleaching wastewater, mercerizing wastewater, dyeing wastewater, printing wastewater, finishing wastewater and other wastewater with high organic content, high chroma, and complex components. The water quality characteristics of printing and dyeing wastewater, such as large changes in w...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/30C02F103/30
CPCC02F1/001C02F1/28C02F1/32C02F1/52C02F1/5245C02F1/56C02F1/66C02F3/02C02F3/34C02F9/00C02F2101/308C02F2103/30C02F2209/06C02F2209/08C02F2301/08C02F2303/04C02F2303/16
Inventor 徐建龙陶国平
Owner 张家港市双盈印染有限公司
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