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Water-based ink wastewater treatment process

A water-based ink and wastewater treatment technology, which is applied in water/sewage treatment, water/sewage multi-stage treatment, biological water/sewage treatment, etc., can solve the problems of complex wastewater composition, strict operation and management requirements, and high treatment costs. Achieve the effects of short processing time, strong adaptability to changes, and high purification efficiency

Pending Publication Date: 2021-10-29
河南功能高分子膜材料创新中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) There are various types, colors, and usages of inks, and the ratio of materials used by each manufacturer is also different, and the quality of wastewater varies greatly;
[0006] (2) The composition of wastewater is relatively complex, and its main pollutants are acrylic water-soluble resins, organic pigments containing chromophoric groups, and small-molecule alcohol compounds, and it also contains various additives such as dispersants and defoamers;
[0008] (4) The vast majority of substances in wastewater are artificially synthesized high-molecular organic compounds, which have strong stability and are difficult to be transformed and degraded by natural microorganisms, causing serious pollution to water bodies and cannot be discharged directly
[0009] Based on the above characteristics of water-based ink wastewater, chemical coagulation is the main treatment method at present, and chemical coagulation also has shortcomings: coagulants and coagulants use chemical agents (or materials), and the treatment costs are generally high , the requirements for operation and management are also stricter

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The raw material ratio of the treatment process is as follows, and each component is in parts by weight:

[0034] Water-based ink waste water: 1000 parts; domestic waste water: 10000 parts x 6 times;

[0035] Coagulant (fermentation liquid of Aspergillus oryzae): 25 parts; dissolved oxygen: 0.044 parts;

[0036] Activated sludge: 0.035 parts

[0037] (1) Add 1000 parts of water-based ink wastewater into the reaction container, add acid or alkali to adjust until the pH value is about 7;

[0038] (2) Add 25 parts of coagulant (fermentation liquid of Aspergillus oryzae) to the reaction vessel, and use a frequency conversion mixer to stir rapidly at a speed of 160 / min for 5 minutes;

[0039] (3) When the coagulant is fully dispersed into the wastewater, use a frequency conversion speed-regulating mixer to stir at a slow speed of 40 / min for 7 minutes;

[0040] (4) Let it settle for 30 minutes, take out the supernatant and add it to the aerobic biological contact reactor, ...

Embodiment 2

[0046] Water-based ink wastewater: 11250 parts; Domestic wastewater: 112500 parts x 6 times;

[0047] Coagulant (fermentation liquid of Aspergillus oryzae): 25 parts; dissolved oxygen: 0.055 parts;

[0048] Activated sludge: 0.079 parts

[0049] The preparation method is the same as in Example 1.

[0050] Adopt technology described in the present invention to process actual domestic waste water, water-based ink waste water, through test index as follows:

[0051] 1. After biological coagulation and precipitation, the COD removal rate reaches 83%, and the chroma removal rate reaches 90%;

[0052] 2. The final COD removal rate can be maintained above 83%, and the effluent COD can be maintained below 100mg / L. The final effluent quality meets the requirements of my country's "Comprehensive Wastewater Discharge Standard GB8979-2002".

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Abstract

The invention belongs to the field of wastewater treatment, and relates to a water-based ink wastewater treatment process. The water-based ink wastewater treatment agent is prepared from the following raw materials in parts by weight: 1000-11250 parts of water-based ink wastewater; 25 parts of domestic wastewater: (10000-112500) parts * 6 times of coagulant (fermentation liquor of aspergillus oryzae); 0.044 to 0.055 part of dissolved oxygen; and 0.035 to 0.079 part of activated sludge. A biological coagulation method is combined with a biological contact oxidation method, and microorganisms are used for wastewater treatment. And COD and chroma removal is efficient and reliable, the purification efficiency is high, the required time is short, microorganisms are utilized to decompose organic matters, the method is more environment-friendly, and the wastewater treatment cost is also reduced. Two kinds of wastewater can be treated at the same time, the process is high in adaptability to changes of organic loads of inflow water, sludge backflow is not needed, and wastewater treatment can be conducted repeatedly. An efficient and practical wastewater treatment route can be provided for urban sewage treatment enterprises and ink manufacturing and printing enterprises, and the process is a green and environment-friendly water-based ink wastewater treatment process.

Description

technical field [0001] The invention belongs to the field of wastewater treatment and relates to a water-based ink wastewater treatment process. Background technique [0002] Ink is an important material for printing, which can express patterns or text information on printed matter. Ink is composed of binders, pigments, fillers, additives and solvents. There are many kinds of inks, but they are often divided into solvent inks such as alcohols, esters, and benzenes according to the solvent system. The solvents in these inks are all volatile organic compounds (VOCs). During the production and printing process of solvent-based inks, they are easily volatile and discharged into the outdoor atmosphere, seriously polluting the environment. [0003] However, water-based ink uses water as a dissolution carrier and does not contain volatile organic solvents, so it will not have adverse effects on the health of workers during the printing process, nor will it pollute the atmospheric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/14
CPCC02F9/00C02F2103/14C02F1/66C02F1/56C02F1/5263C02F3/12C02F2001/007C02F1/001
Inventor 张瀛铎闫银凤郝自娟黄晓谨王宏磊张银宝田传永李勇敢杨武涛苏帅杰袁永浩聂夕冉
Owner 河南功能高分子膜材料创新中心有限公司
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