CN1834041A

CN1834041A - Aqueous ink wastewater treatment technique

Info

Publication number: CN1834041A
Application number: CN 200610039189
Authority: CN
Inventors: 周恩民; 吴忠山; 陈岚; 丁叶; 庄坚; 张翙
Original assignee: KEHUAN ENVIRONMENT SYSTEM ENGINEERING Co Ltd NANJING
Current assignee: KEHUAN ENVIRONMENT SYSTEM ENGINEERING Co Ltd NANJING
Priority date: 2006-03-30
Filing date: 2006-03-30
Publication date: 2006-09-20

Abstract

This invention relates to water-soluble ink sewage disposal, which includes a separation system, an internal electrolysis system and a biochemical system. It has the characteristics that by adding acid, acrylic resin in sewage is transferred from dissolved state to solid state (SS) by adding acid and can be thus removed with solid-liquid separation method. The sewage treated in the separation system goes through the internal electrolysis system where organic molecular structures inside the water are changed. In this way, sewage is decolorized and its biodegradability is promoted, and it can reach the national discharge standard after treatment in the biochemical system.

Description

Aqueous ink waste water disposal process

Technical field

The present invention relates to a kind of water color ink wastewater processing technology, belong to the technology for treating industrial waste water field.

Background technology

At present, what domestic packed in cases industry generally adopted is the water color ink printing technology, needs cleaning of graphic arts equipment can discharge a certain amount of printing ink wastewater owing to need to change printing ink in process of production.Principal pollutant are the water soluble resin (vehicle) of oleic series, the ring-type organism (pigment) that contains band color base group and the alcohol radical or the phenyl dispersion agent of macromolecule in the water color ink factory effluent, wherein acrylic resin is a COD chief component in the waste water, accounts for more than 80%.Because the COD and the colourity of general water color ink waste water are all very high, do not possess and directly to discharge and the biochemical treatment condition, even adopt direct thin up way dilute tens times even hundred times, thousands of times, the colourity of waste water and COD also are difficult to qualified discharge, have increased pollution volume, intractability and the processing cost of waste water simultaneously again; Adopt burning, the buried method of outward transport also to make cost for wastewater treatment very high, cause secondary pollution easily, allow enterprise be difficult to bear.

Summary of the invention

The present invention is a kind of effective aqueous ink waste water disposal process technology, has solved water color ink wastewater treatment expense height, and the problem of qualified discharge difficulty can be widely used in the water color ink wastewater treatment of different load.

Technical scheme of the present invention is:

In water color ink waste water, add acid, make in the waste water acrylic resin be converted into solid-state SS and from waste water, separate out, solid-state SS can be removed by solid-liquid separating method by solubilised state; The waste water that acidified solid-liquid separation was handled also has certain colourity and difficult biochemical, under acidic conditions, directly enter interior electrolytic system, make by interior electrolytic action (iron carbon FeC reaction) that organic molecule changes in the waste water, removed the color of waste water, the COD clearance reaches more than 85%; Through solid-liquid separation system, interior electrolytic system, make B/C 〉=0.25 of waste water, having possessed can be biochemical, easy biochemical, can directly carry out biochemical treatment or enter domestic sewage processing system and other biochemical treatment system is handled jointly.

This technology has following characteristics:

1, technical process is simple, and engineering reliability is strong, applicable to the printing ink wastewater of the negative He of various differences;

2), investment cost economizes, floor space is little, running cost is low;

3), control flexibly, operation is simple;

Description of drawings

Fig. 1 is a process flow sheet of the present invention

Fig. 2 is an artwork of the present invention

1. equalizing tanks among Fig. 2,2. lift pump, 3. coagulation bucket, 4. solid-liquid separator, 5. electrolysis reactors in 6. lift pumps 7. of transition pond, 8. blower fan, 9. coagulation bucket, 10. settling tank

Below in conjunction with drawings and Examples technology of the present invention is described further:

1) printing ink wastewater of Sheng Chaning focuses at equalizing tank 1, by lift pump 2 waste water is promoted to coagulation bucket 3 by equalizing tank;

2) add acid and coagulant aids in coagulation bucket 3, water outlet enters solid-liquid separator 4, removes SS;

3) solid-liquid separator 4 water outlets enter 5 collection and treatments of transition pond;

5) waste water by lift pump 6 be promoted in electrolysis reactor 7, under acidic conditions by the aeration that ventilates in the blower fan 8 inside electrolysis reactors, the colourity of further removing waste water;

6) interior electrolysis reactor 7 water outlets add alkali by coagulation bucket 9 and coagulant aids is transferred to neutrality with the waste water pH value, enter settling tank 10;

7) waste water is removed SS by settling tank 10, and biochemical treatment is further carried out in water outlet;

8) can qualified discharge through biochemical treatment waste water.

In the above-mentioned example, all water color ink waste water adopts and adds acid removal acrylic resin and adopt internal electrolysis principle to remove printing ink wastewater colourity all in processing requirement protection domain of the present invention.

Claims

1, a kind of treatment process method of water color ink waste water comprises solid-liquid separation system, interior electrolytic system, biochemical system.It is characterized in that: described solid-liquid separation system is to add acid in waste water, makes in the waste water acrylic resin be converted into solid-state SS by solubilised state and separates out from waste water, SS can be removed by solid-liquid separating method; Electrolytic system is directly to enter interior electrolytic system through the waste water that solid-liquid separation was handled under acidic conditions in described, changed organic molecular structure in the waste water by interior electrolytic oxidation (iron carbon FeC reaction), remove the color of waste water, improved the biodegradability of waste water simultaneously; Described biochemical system is after waste water has passed through solid-liquid separation system, interior electrolytic system and carries out pre-treatment, and waste water is converted into biodegradability, easy biochemical by original not biodegradability, difficult biochemical.

2, the solid-liquid separation system of aqueous ink waste water disposal process method according to claim 1, it is characterized in that, in waste water, add acid and make that acrylic resin is converted into solid-state SS by solubilised state in the waste water, solid-state SS by filter, solid-liquid separating methods such as vapour is floating, precipitation remove.

3, the interior electrolytic system of aqueous ink waste water disposal process method according to claim 1, it is characterized in that, waste water is sour by behind the solid-liquid separation removal acrylic resin through adding, waste water also has certain color and difficult biochemical, act on by interior electrolysis (FeC reaction) at acidic conditions, can remove the waste water color, make waste water possess biodegradability, easy biochemical.

4, the biochemical system of aqueous ink waste water disposal process method according to claim 1, after it is characterized in that waste water has passed through solid-liquid separation system and interior electrolytic system pre-treatment, can directly enter domestic sewage processing system or other sewage biochemical treatment system.

5,, can require according to the influent quality of solid-liquid separation system disposition and biochemical system to select to increase or do not increase according to the interior electrolytic system of claim 1 or 3 described aqueous ink waste water disposal process methods.