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Method for treating ink wastewater

A technology of ink wastewater and treatment method, which is applied in the field of environmental protection, can solve the problems of poor treatment effect of refractory macromolecular organic matter, unstable effluent water quality, etc., and achieve good effect, stable effluent water quality, and high COD effect

Inactive Publication Date: 2017-07-28
张颖柏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic ink wastewater treatment methods mainly include coagulation precipitation, electrolysis and adsorption, etc., but these methods all have: (1) poor treatment effect on refractory biodegradable macromolecular organic matter; (2) unstable effluent quality and other shortcomings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Step A: Acid analysis treatment, introducing the ink wastewater into the acid analysis tank, adjusting the pH value to 3, stirring mechanically for 30 minutes, standing for 30 minutes, separating to obtain supernatant A and precipitate A, and filtering the precipitate A, Obtain press filtrate A;

[0017] Step B: Fenton oxidation treatment, introduce the supernatant A and press filter A obtained in step A into the Fenton oxidation tank, and add Fe2+ and H 2 o 2 , stir, adjust the pH value, separate to obtain supernatant B and precipitate B, and precipitate B to press filter to obtain press filter B, the Fe 2+ and H 2 o 2 The amount ratio is 1:10, the stirring time is 20min, and the pH value is adjusted to 8;

[0018] Step C: MBR reaction treatment, the supernatant B and the press-filtrate B obtained in step B are degraded by MBR microorganisms to obtain purified water with COD<100, and the HRT is 4h during the MBR reaction treatment process.

Embodiment 2

[0020] Step A: Acid analysis treatment, introducing the ink wastewater into the acid analysis tank, adjusting the pH value to 4, stirring mechanically for 15 minutes, standing for 45 minutes, separating to obtain supernatant A and precipitate A, and filtering the precipitate A, Obtain press filtrate A;

[0021] Step B: Fenton oxidation treatment, introduce the supernatant A and press filter A obtained in step A into the Fenton oxidation tank, and add Fe 2+ and H 2 o 2 , stir, adjust the pH value, separate to obtain supernatant B and precipitate B, and precipitate B to press filter to obtain press filter B, the Fe 2+ and H 2 o 2 The amount ratio is 1:1, the stirring time is 10min, and the pH value is adjusted to 6;

[0022] Step C: MBR reaction treatment, degrade the supernatant liquid B and press-filtrate B obtained in step B through MBR microorganisms to obtain purified water with COD<100, and the HRT during the MBR reaction treatment process is 6h.

Embodiment 3

[0024] Step A: Acid analysis treatment, introducing the ink wastewater into the acid analysis tank, adjusting the pH value to 3.5, stirring mechanically for 15 minutes, standing for 40 minutes, separating to obtain supernatant A and precipitate A, and filtering the precipitate A, Obtain press filtrate A;

[0025] Step B: Fenton oxidation treatment, introduce the supernatant A and press filter A obtained in step A into the Fenton oxidation tank, and add Fe 2+ and H 2 o 2 , stir, adjust the pH value, separate to obtain supernatant B and precipitate B, and precipitate B to press filter to obtain press filter B, the Fe 2+ and H 2 o 2 The amount ratio is 1:6, the stirring time is 15min, and the pH value is adjusted to 8;

[0026] Step C: MBR reaction treatment, degrade the supernatant liquid B and press-filtrate B obtained in step B through MBR microorganisms to obtain purified water with COD<100, and the HRT during the MBR reaction treatment process is 5h.

[0027] In the st...

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PUM

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Abstract

The invention relates to the field of environment protection, in particular to a method for treating ink wastewater. The method comprises the following steps: A, performing acid separation treatment, namely introducing ink wastewater into an acid separation tank, adjusting the pH value to 3-4, performing mechanical stirring for 15-30 minutes, leaving to stand for 30-45 minutes, and performing separation to obtain supernate A and precipitate A, and performing pressing filtration on the precipitate A to obtain pressing filtrate A; B, performing Fenton oxidation treatment, namely introducing the supernate A and the pressing filtrate A obtained in the step A into a Fenton oxidation tank, feeding Fe<2+> and H2O2, stirring, adjusting the pH value, performing separation to obtain supernate B and precipitate B, and performing pressing filtration on the precipitate B to obtain pressing filtrate B, wherein the ratio of Fe<2+> to H2O2 is (1:10)-(1:1), the stirring time is 10-20 minutes, and the pH value is adjusted to 6-8; C, performing MBR (membrane bio-reactor) reaction treatment, namely performing MBR microorganism degradation on the supernate B and the pressing filtrate B obtained in the step B, thereby obtaining purified water of which the COD (chemical oxygen demands) is less than 100, wherein the HRT (hydraulic retention time) of the MBR reaction treatment process is 4-6 hours. The technical scheme of the invention has the advantages of good organic matter treatment effect and stable effluent quality.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a method for treating ink wastewater by using technologies such as acid analysis, Fenton and MBR. Background technique [0002] Ink wastewater mainly comes from the cleaning process of printing equipment. Its chemical composition is complex, and it has the characteristics of high COD (tens of thousands of mg / L), large chroma, and difficult biodegradation. At present, domestic ink wastewater treatment methods mainly include coagulation precipitation, electrolysis and adsorption, etc., but these methods all have: (1) poor treatment effect on refractory biodegradable macromolecular organic matter; (2) unstable effluent quality and other shortcomings. Contents of the invention [0003] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides a method for treating ink wastewater, which has the advantages of good organic matter tre...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/30
CPCC02F1/66C02F1/72C02F1/722C02F3/1268C02F9/00C02F2101/30C02F2301/08
Inventor 张颖柏
Owner 张颖柏
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