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
View PDF2 Cites 7 Cited by
  • 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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0015] Example 1

[0016] Step A: Acid precipitation treatment, introduce the ink wastewater into the acid precipitation tank, adjust the pH value to 3, mechanically stir for 30 minutes, and stand for 30 minutes, and then separate to obtain the supernatant A and the precipitate A. The precipitate A is filtered by pressure. Obtain press filtrate A;

[0017] Step B: Fenton oxidation treatment, introduce the supernatant A and press filtrate 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 the supernatant B and the precipitate B, press the precipitate B to obtain the filtrate B, the Fe 2+ And H 2 O 2 The 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 press filtrate B obtained in step B are degraded by MBR microorganisms to obtain COD For purified water <100, HRT is 4h during MBR reaction treatment.

Example Embodiment

[0019] Example 2

[0020] Step A: Acid precipitation treatment, introduce the ink waste water into the acid precipitation tank, adjust the pH value to 4, mechanically stir for 15 minutes, stand for 45 minutes, separate to obtain supernatant A and sediment A, and filter the sediment A. Obtain press filtrate A;

[0021] Step B: Fenton oxidation treatment, the supernatant A and press filtrate A obtained in step A are introduced into the Fenton oxidation tank, and Fe is added 2+ And H 2 O 2 , Stir, adjust the PH value, separate to obtain the supernatant B and the precipitate B, press the precipitate B to obtain the filtrate B, the Fe 2+ And H 2 O 2 The amount ratio is 1:1, the stirring time is 10 minutes, and the pH value is adjusted to 6;

[0022] Step C: MBR reaction treatment, the supernatant B and press filtrate B obtained in step B are degraded by MBR microorganisms to obtain COD For purified water <100, HRT is 6h during MBR reaction treatment.

Example Embodiment

[0023] Example 3

[0024] Step A: acid precipitation treatment, introduce the ink waste water into the acid precipitation tank, adjust the pH value to 3.5, mechanically stir for 15 minutes, and stand for 40 minutes, and then separate to obtain supernatant A and sediment A. The sediment A is filtered by pressure. Obtain press filtrate A;

[0025] Step B: Fenton oxidation treatment, the supernatant A and press filtrate A obtained in step A are introduced into the Fenton oxidation tank, and Fe is added 2+ And H 2 O 2 , Stir, adjust the PH value, separate to obtain the supernatant B and the precipitate B, press the precipitate B to obtain the filtrate 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, the supernatant B and press filtrate B obtained in step B are degraded by MBR microorganisms to obtain COD For purified water <100, HRT is 5h during MBR reaction treatment.

[0027] In the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C02F9/14C02F101/30
CPCC02F1/66C02F1/72C02F1/722C02F3/1268C02F9/00C02F2101/30C02F2301/08
Inventor 张颖柏
Owner 张颖柏
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap