CN105800864A - Zero discharge method for waste liquid of water-based ink - Google Patents
Zero discharge method for waste liquid of water-based ink Download PDFInfo
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Abstract
The invention relates to a zero discharge method for waste liquid of water-based ink, belonging to the technical field of industrial wastewater treatment. The zero discharge method for the waste liquid of the water-based ink comprises the following steps: S1, collecting the waste liquid into a regulating tank, and subjecting the collected waste liquid to homogenization treatment; S2, carrying out advanced oxidation treatment; S3, carrying out flocculation reaction treatment; S4, carrying out solid-liquid separation treatment so as to remove suspended matters; S5, carrying out electrocatalytic oxidation treatment; S6, carrying out anaerobic biochemical treatment; S7, carrying out aerobic biochemical treatment; S8, carrying out reverse osmosis (RO) membrane treatment, wherein reverse osmosis (RO) membrane treated water can be used as recycling water; S9, collecting reverse osmosis (RO) membrane treated concentrated water; and S10, subjecting the collected concentrated water to multiple-effect evaporation treatment so as to obtain water reaching the standard, wherein the water reaching the standard can be used as the recycling water. According to a technical scheme of the invention, biochemical effluent is treated through a reverse osmosis (RO) membrane system; the reverse osmosis (RO) membrane treated concentrated water enters an evaporator for evaporative crystallization treatment; reverse osmosis (RO) membrane treated water and evaporated condensate water achieve the requirements of the Reuse of Urban Recycling Water-Water Quality Standard for Industrial Uses (GB/T19923-2005); and finally, zero discharge of the waste liquid of ink is realized.
Description
Technical field
The present invention relates to industrial waste water treatment, particularly relate to a kind of water color ink Zero discharge method.
Background technology
Water color ink is referred to as ink, mainly by water-soluble resin, organic pigment, solvent and related auxiliaries through abrasive machining
Form.At present, what domestic packed in cases, wallpaper production industry were commonly used is water color ink printing technology, water color ink waste water
The draining of printing relevant device is cleaned in source when mainly changing ink, produce as washed between rod, washing trough, cask washing, flushing operation etc.
Waste water.In water color ink waste water main pollute for oleic series water-soluble resin (vehicle), ring-type containing colored group
Organic substance (colorant) and the alcohol radical of macromolecule or phenyl dispersant.
General indication printing ink wastewater CODcr concentration is 1000～5000mg/L, and high person is up to 30000mg/L；Float is the highest can
Reach 5000mg/L.Its BOD5/ COD (B/C) is general about 0.4.Compare currently for common ink wastewater processing technology
Ripe.But the CODcr >=30000mg/L produced during water color ink is used, solid content >=1.5%, B/C≤0.2,
Thick ink liquid waste processing does not also have mature technology.Ink waste liquid CODcr, solid content are high, in thick opaque transparent liquid
Body, B/C is relatively low, and its biodegradability is poor.Prior art typically processes oil by burning, outward transport as the method for the useless landfill of danger
Ink waste liquid, but the cost of these processing methods is the highest, easily causes secondary pollution.
Prior art has the disadvantage that or not enough:
(1) burning method: incineration treatment method, cost of investment is high, and processed in units is costly；
(2) committee is outer processes: committee is outer processes charge height, and freight is high, easily brings secondary pollution；
(3) coagulation+filter pressing+biochemistry: this technique is applicable to general printing ink wastewater, but for ink waste liquid, reaches muddy water
The effect separated, coagulant dosage is very big, and sludge output increases, and increases Treatment of Sludge cost.B/C ratio does not has
Being improved, biochemical property is poor, it is difficult to reach discharge standard.
During current document and patent are introduced, it is both for the research that conventional printing ink waste water is carried out, and ink waste liquid is not also had
Ripe technology.Patent No. ZL201310126028.5, the Chinese invention of entitled " aqueous ink waste water disposal process " is special
Profit uses and processes water color ink waste water with " coagulation and filtration+air supporting+biological oxidation " group technology, and this patent of invention is in routine
In printing ink wastewater application, can reach the first discharge standard of national sewage comprehensive emission standard (GB8978-1996), it is possible to meet
The needs of environmental protection.This invented technology being applied in ink waste liquid, the solid content according to ink waste liquid is high, has the spy of toughness
Point, needs in coagulation process to add substantial amounts of coagulant, and adding in a large number of coagulant not only increases medicament expense use, also can increase dirt
Mud generation amount, Treatment of Sludge expense raises.CODcr >=30000mg/L, the water color ink waste liquid of B/C≤0.2, through coagulation mistake
Directly carrying out the biochemical treatment of two-stage A/O after filter, the biochemical treatment time is long, increases construction cost, and is extremely difficult to emission request.
Therefore a lot of conventional printing ink waste water treatment process are not suitable for the process of ink waste liquid.
Summary of the invention
In order to solve above-mentioned technical problem, it is an object of the invention to provide a kind of water color ink Zero discharge method, this aqueous oil
Ink effluent purifying processing method mainly for CODcr >=30000mg/L, solid content >=1.5%, B/C≤0.2, thick
The purified treatment of ink waste liquid, treatment effect is obvious.
It is an object of the invention to be achieved through the following technical solutions:
A kind of water color ink Zero discharge method, comprises the steps:
Water color ink waste liquid carries out waste liquid through regulating reservoir and mixes well, and then utilizes elevator pump to squeeze into advanced oxidation pond, carries out senior oxygen
Change reaction, improved mud-water separation performance and the biodegradability of toughness waste liquid by advanced oxidation effect.After advanced oxidation reacts
Enter flocculation basin, add flocculant generation flocculation reaction.Water color ink waste liquid through flocculation reaction is carried out solid-liquid separation process,
Float in waste liquid is separated with waste water.Waste water enters electrocatalytic oxidation equipment, is directly degraded by anode reaction organic
Thing or generation hydroxyl radical free radical OH, Cl2、O2And O4Deng the method for oxidant degradation of organic substances, partial organic substances of not only degrading,
And difficult degradation larger molecular organics can be converted into biodegradability small organic molecule.Electrocatalytic oxidation water outlet is regulated pH value
Rear entrance anaerobism+aerobic treatment system, the waste water after biochemical treatment carries out RO film process, and the dense water conservancy that RO produces is steamed
Sending out device crystallization to concentrate, evaporative crystallization concentrated solution committee is outer to be processed, and RO produces water and can reach reuse standard with evaporator condensation water.
By the technical scheme of the invention described above, the water color ink Zero discharge method of the present invention compensate at water color ink waste liquid
The blank of reason technology.For CODcr >=30000mg/L, solid content >=1.5%, B/C≤0.2, thick water color ink gives up
Liquid treatment effect is obvious, finally realizes water color ink Zero discharge.
Accompanying drawing explanation
Fig. 1 is the FB(flow block) of a kind of embodiment of water color ink effluent purifying processing method of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in detail:
As it is shown in figure 1, a kind of water color ink Zero discharge method, it comprises the steps:
S1, regulating reservoir, carry out waste collection and mix well process；This step is carried out in regulating reservoir, and the water color ink that workshop produces gives up
Liquid is collected to regulating reservoir, utilizes aeration mode to carry out waste liquid and mixes well process.
S2, carries out advanced oxidation process by passing through the waste water mixing well process.Advanced oxidation processes is the Strong oxdiative utilizing chemical oxidizing agent
Property, the inorganic matter in waste water is become with Organic substance exhaustive oxidation nontoxic small-molecule substance or gas, thus reaches the purpose processed,
Chemical oxidization method can remove the most organic pollutions in waste water and some inorganic matter.Use Fenton oxidation method, utilize
Dissolvable Fe2+And H2O2Mix the Fenton reagent formed according to a certain percentage, gas chromatography can be aoxidized, and operation need not
High Temperature High Pressure, high treating effect.Fenton oxidation can decompose larger molecular organics, has broken complexing, reduce CODcr,
The effect of decolouring, improves mud-water separation performance.
S3, carries out flocculation reaction process by the waste water processed through advanced oxidation.Flocculant is added in flocculation reaction processing means,
The tiny particle produced after advanced oxidation is changed into bulky grain float.
S4, carries out solid-liquid separation process by the waste water through flocculation reaction, removes oil removal.This step is in solid-liquid separation system
Carry out.Utilize pneumatic diaphragm pump that the ink waste liquid through advanced oxidation is promoted to solid-liquid separation system, reach the effect of mud-water separation.
S5, carries out electrocatalytic oxidation process by the waste water processed through solid-liquid separation.This step is realized by electrocatalytic oxidation equipment.
Electrocatalytic oxidation refers to by the direct degradation of organic substances of anode reaction or produces hydroxyl radical free radical OH, Cl2、O2And O4Deng oxidant
The method of degradation of organic substances, and the effect that larger molecular organics reaches to decolour can be decomposed, thus improve the biodegradability of waste water.
S6, carries out anaerobic biochemical treatment by the waste water processed through electrocatalytic oxidation.Anaerobic bio-treated refers at free-dioxygen bar
By the effect from oxygen biological (including oxygen biology of holding concurrently) under part, the various complicated organic molecules in waste water are converted into little molecule
Organic substance, and partial organic substances and then change into the form of methane, reduce CODcr content, referred to as anaerobic digestion.
S7, carries out aerobic treatment by the waste water through anaerobic biochemical treatment.Aerobic treatment refers under aerobic condition logical
Cross the metabolism of aerobe, reduce CODcr content.
S8, carries out RO film process by the waste water through Aerobic Process for Treatment, and the water up to standard after process can use as recycle-water.RO film
Process supporting cartridge filter, the built-in filter core of cartridge filter, act primarily as filtration；Reverse osmosis membrane system utilizes reverse osmosis
The centrifugation of permeable membrane, it is possible to effectively filter outputted aerobic water, reaches the effect that purifies water, and produces water water quality and can reach " city dirt
Water reuse (treatment utilizes water quality standard for industries " (GB/T19923-2005) requirement.
S9, collects the dense water after RO film processes.This step is realized by dense water collecting pit, collects counter-infiltration system and produces
Dense water.
S10, carries out multiple-effect evaporation process by the dense water collected, and the water up to standard obtained can use as recycle-water.This step is by many
Single-effect evaporator realizes, and vaporizer is made up of preheater, heater, vaporizer, condenser and interconnecting tube road, multiple-effect evaporation
In device, another vaporizer can be introduced by indirect steam as adding vapours, in like manner, newly generated new of second vaporizer
Indirect steam can add vapours as the 3rd vaporizer again.So, each vaporizer is i.e. referred to as an effect, by multiple vaporizers
Couple together a biconditional operation, i.e. one multi-effect evaporation system of composition.By the principle of multi-effect evaporator, evaporation condensed water can be with RO
Producing water mixing and be back to use production technology, crystallization concentrated solution processes as danger is useless.
Embodiment: as a example by the water color ink waste liquid of generation during Shanghai wallpaper manufacturing enterprise is produced, introduce the inventive method
Application, waste liquid CODcr 80400mg/L, solid content 2.4%, B/C 0.18, pH 7.8, dark blue-green muddy water mixed solution,
This waste liquid CODcr, solid content and colourity are the highest, and biodegradability is poor.Processing procedure is as follows:
By workshop water color ink waste collection to regulating reservoir, by the way of aeration, carry out waste liquid mix well.Elevator pump is utilized to mix well
Waste liquid is promoted to Fenton oxidation pond, stirs equipped with blender in Fenton oxidation pond, utilizes dosing pump to add 30% and SO4, control pH
Value is 3～4, and the hydrogen peroxide, the concentration that utilize dosing pump addition concentration to be 30% are the FeSO of 10%4, hydrogen peroxide dosage be 5～
20ml/L, FeSO4 dosage is 1.5～5g/L, and hydraulic detention time is 0.5～2h, after Fenton oxidation, water color ink
Waste liquid muddy water is easily separated, and supernatant is light green.Waste liquid elevator pump after Fenton oxidation is squeezed into flocculation basin, uses in flocculation basin
Dosing pump adds polyacrylamide (PAM) dilute solution, and PAM dosage is 0.05～0.5g/L, utilizes blender to stir
Mixing, hydraulic detention time is 0.2～0.5h.With pneumatic diaphragm pump, the ink waste liquid through flocculation reaction is squeezed into plate and frame filter pressing
Machine, utilizes canvas press cloth can retain the ability of more than 30 microns particulate matters of particle diameter, and bulky grain flocculation reaction generated suspends
Thing all retains, and major part Organic substance is trapped in form of a sludge, and filter cloth is about 11000mg/L through water CODcr.Filter
Cloth enters electrocatalytic oxidation equipment through water, and electrocatalytic oxidation equipment hydraulic detention time is 0.5～2h, through electrocatalytic oxidation
After process, the water color ink waste water COD cr≤5000mg/L of generation, SS≤50mg/L, B/C >=0.3, colourity reaches sewage
Comprehensive discharge standard (GB8978-1996) first discharge standard requirement.After electrocatalytic oxidation waste water regulation pH value be 6.5～
Carrying out biological oxidation process after 7.5, use anaerobism+aerobic treatment process, anaerobic treatment uses UASB technique, during hydraulic retention
Between be 48～96h.Anaerobic system water outlet enters Aerobic Process for Treatment system, and the system of supporting is conventional aerobic sludge processing method well, water
The power time of staying is 10～20h, buries water outlet and carry out mud-water separation through sedimentation tank at aerobic system, and effluent quality CODcr is 320
About mg/L, SS15mg/L, conductance 9650us/cm.Bio-chemical effluent is promoted to RO film processing system, RO by high-pressure pump
Dense water is evaporated crystallization treatment through multi-effect evaporator, and RO produces water with evaporation condensed water conductance less than 40us/cm, CODoLittle
In 45mg/L, pH value is between 6～8.Meet " urban sewage reutilization water quality standard for industries " (GB/T19923-200o)
Requirement.
The invention provides a kind of water color ink Zero discharge method, not only solve the problem that water color ink liquid waste processing is difficult,
May also reach up the purpose of reuse, saving water resource, reduce charges for disposing pollutants and use.This water color ink Zero discharge technique is with " senior
Oxidation+solid-liquid separation system+electrocatalytic oxidation+anaerobic treatment+Aerobic Process for Treatment+RO processing system+multi-effect evaporator " group technology
Process water color ink waste liquid, can reach " urban sewage reutilization water quality standard for industries " (GB/T19923-2005) and want
Ask.Solve water color ink liquid waste processing costly, recycle difficult problem.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art in the technical scope that the invention discloses, the change that can readily occur in or replacement, all should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (2)
1. a water color ink Zero discharge method, it is characterised in that comprise the steps:
S1, regulating reservoir, carry out waste collection and mix well process；
S2, carries out advanced oxidation process by passing through the waste water mixing well process；
S3, carries out flocculation reaction process by the waste water processed through advanced oxidation；
S4, carries out solid-liquid separation process by the waste water through flocculation reaction, removes oil removal；
S5, carries out electrocatalytic oxidation process by the waste water processed through solid-liquid separation；
S6, carries out anaerobic biochemical treatment by the waste water processed through electrocatalytic oxidation；
S7, carries out aerobic treatment by the waste water through anaerobic biochemical treatment；
S8, carries out RO film process by the water through Aerobic Process for Treatment, and the water up to standard after process can use as recycle-water；
S9, collects the dense water after RO film processes；
S10, carries out multiple-effect evaporation process by the dense water collected, and the water up to standard obtained can use as recycle-water.
Water color ink Zero discharge method the most according to claim 1, it is characterised in that described step S10 is steamed in multiple-effect
Carrying out in transmitting apparatus, described multi-effect evaporating device includes preheater, heater, vaporizer, condenser and interconnecting tube road.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110642436A (en) * | 2019-10-08 | 2020-01-03 | 桂润环境科技股份有限公司 | Deep decolorization treatment system and method for Maotai-flavor liquor brewing wastewater |
| CN111320320A (en) * | 2020-03-31 | 2020-06-23 | 埃尔博工业设备(北京)有限公司 | System and process for treating water in water tank of printing plant to reach discharge standard |
| CN111908741A (en) * | 2020-09-09 | 2020-11-10 | 青岛润扬环境科技有限公司 | Zero-discharge and resource utilization process for reverse osmosis high-salinity wastewater |
| CN113402095A (en) * | 2021-05-25 | 2021-09-17 | 湖南四环环保科技有限公司 | Waste-free recycling treatment process for printing ink wastewater |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110642436A (en) * | 2019-10-08 | 2020-01-03 | 桂润环境科技股份有限公司 | Deep decolorization treatment system and method for Maotai-flavor liquor brewing wastewater |
| CN110642436B (en) * | 2019-10-08 | 2022-06-03 | 桂润环境科技股份有限公司 | Deep decolorization treatment system and method for Maotai-flavor liquor brewing wastewater |
| CN111320320A (en) * | 2020-03-31 | 2020-06-23 | 埃尔博工业设备(北京)有限公司 | System and process for treating water in water tank of printing plant to reach discharge standard |
| CN111908741A (en) * | 2020-09-09 | 2020-11-10 | 青岛润扬环境科技有限公司 | Zero-discharge and resource utilization process for reverse osmosis high-salinity wastewater |
| CN113402095A (en) * | 2021-05-25 | 2021-09-17 | 湖南四环环保科技有限公司 | Waste-free recycling treatment process for printing ink wastewater |
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