CN110498532A - The processing method and processing unit of printed wiring board waste water - Google Patents
The processing method and processing unit of printed wiring board waste water Download PDFInfo
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- CN110498532A CN110498532A CN201910754582.5A CN201910754582A CN110498532A CN 110498532 A CN110498532 A CN 110498532A CN 201910754582 A CN201910754582 A CN 201910754582A CN 110498532 A CN110498532 A CN 110498532A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/62—Heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
- C02F1/705—Reduction by metals
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
Abstract
This application discloses the processing methods and processing unit of a kind of printed wiring board waste water, the processing method includes: that alkaline reagent is added into waste water to be processed, so that the reaction of free state copper ion generates hydroxide deposits in waste water to be processed, and hydroxide deposits are removed, to obtain supernatant；Contact break processing is carried out to the copper in complex state in supernatant, and copper in complex state reaction is made to generate solid sediment, removes solid sediment, with the waste water that obtains that treated.By the above-mentioned means, the application can reduce the cost of wastewater treatment.
Description
Technical field
This application involves the processing technology fields of waste water, a kind of processing method more particularly to printed wiring board waste water and
Processing unit.
Background technique
In printed wiring board production, multiple tracks process need to be handled using chemical medicinal liquid, and the copper on printed wiring board occurs anti-
Should after generate free state copper ion and copper in complex state, eventually enter into waste water.
However, copper is toxic heavy metal, need to handle waste water so that the concentration of copper therein to be reduced to
Subsequent biochemical system of being allowed for access after 0.5mg/L or less processing.
Summary of the invention
The application mainly solving the technical problems that provide the processing method and processing unit of a kind of printed wiring board waste water,
It can reduce the cost of wastewater treatment.
In order to solve the above technical problems, the technical solution that the application uses is: providing a kind of printed wiring board waste water
Processing method, the treating method comprises: alkaline reagent is added into waste water to be processed, to the waste water middle reaches to be processed
Amorph copper ion carries out the first precipitation process, and removes the first sediment generated by first precipitation process, on obtaining
Clear liquid；Contact break processing and the second precipitation process are carried out to the copper in complex state in the supernatant, treated to obtain
Waste water.
In order to solve the above technical problems, another technical solution that the application uses is: it is useless to provide a kind of printed wiring board
The processing unit of water, the processing unit include the first processing system and second processing system；Wherein, first processing system
For by being added alkaline reagent into waste water, and the first precipitation process is carried out to free state copper ion in waste water, and remove by
The first sediment that first precipitation process generates, to obtain supernatant；Second processing system, for in the supernatant
Copper in complex state carry out contact break processing and the second precipitation process, with the waste water that obtains that treated.
The beneficial effect of the application is: being in contrast to the prior art, the processing side of the application printed wiring board waste water
Method carries out the first precipitation process to free state copper ion in waste water to be processed first with alkaline reagent, in removal by the first precipitating
After handling the first sediment generated, contact break processing and the second precipitating further are carried out to the copper in complex state in supernatant
Processing, thus the waste water that obtains that treated.Since cost is relatively low for alkaline reagent, first using alkaline reagent to waste water middle reaches to be processed
Amorph copper ion, which carries out the first precipitation process, can reduce the cost of wastewater treatment.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.Wherein:
Fig. 1 is the structural schematic diagram of one embodiment of processing unit of the application printed wiring board waste water
Fig. 2 is the flow diagram of one embodiment of processing method of the application printed wiring board waste water；
Fig. 3 is the flow diagram of step S21 in Fig. 2；
Fig. 4 is the flow diagram of step S22 in Fig. 2.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, rather than whole embodiments.Based on this
Embodiment in application, those of ordinary skill in the art are obtained every other under the premise of not making creative labor
Embodiment shall fall in the protection scope of this application.
In printed wiring board production, multiple tracks process need to be handled using chemical medicinal liquid, and NH is contained in liquid medicine3, ethylenediamine tetraacetic
Acetic acid (Ethylenediaminetetraacetic acid, EDTA), Cl-、CN-Etc. ligands, when ligand and printed circuit
Copper on plate generates copper in complex state after reacting, and copper waste water is complexed into generating in waste water, meanwhile, in waste water
There can be free state copper ion.However, copper is toxic heavy metal, it is necessary to which the copper removal in waste water is reached 0.5mg/L or less
Biochemical system can just be entered after (" discharge standard for electroplating pollutants " GB21900-2008) and carry out subsequent processing.
Due to both containing free state copper ion in waste water, also contain copper in complex state, and copper in complex state property compared with
For stabilization, contact break processing need to be carried out, is then further removed.
Referring to Fig. 1, Fig. 1 is the structural schematic diagram of one embodiment of processing unit of the application printed wiring board waste water.
Wherein, which may include the first processing system 11 and second processing system 12, wherein the first processing system
11 may include the first reaction tank 111, the first flocculation basin 112 and the first sedimentation basin 113；Second processing system 12 may include second anti-
Answer pond 121, the second flocculation basin 122 and the second sedimentation basin 123.
In present embodiment, when being handled using the processing unit printed wiring board waste water, successively make to be processed
Waste water first after the processing of the first processing system 11, is further handled through second processing system 12.
Specifically, during the processing of the first processing system 11, waste water to be processed is successively through the first reaction tank 111, the
One flocculation basin 112 and the processing of the first sedimentation basin 113；During the processing of second processing system 12, then successively through the second reaction
Pond 121, the second flocculation basin 122 and the second sedimentation basin 123, finally obtain that treated waste water, biochemical system of being allowed for access.
Referring to Fig. 2, Fig. 2 is the flow diagram of one embodiment of processing method of the application printed wiring board waste water.
In present embodiment, the processing method of printed wiring board waste water includes:
Step S21: being added alkaline reagent into waste water to be processed, so that free state copper ion reacts in waste water to be processed
Hydroxide deposits are generated, and remove hydroxide deposits, to obtain supernatant；
Wherein, which can be realized by the first processing system in the processing unit of above-mentioned printed wiring board waste water.
Specifically, free state copper ion in waste water to be processed is carried out by adding alkaline reagent into waste water to be processed
First precipitation process, to remove or at least reduce the content of free state copper ion in waste water to be processed.Specifically, it please refers to
Fig. 3, the step can include:
Step S211: under agitation, alkaline reagent is added into waste water to be processed, adjusts the pH of waste water to be processed
Value, and react at the first time, so that the reaction of free state copper ion generates hydroxide deposits in waste water to be processed, obtain hydrogen-oxygen
Change copper suspension；
Specifically, which can carry out in the first reaction tank of above-mentioned first processing system, and blender specifically can be used
Waste water to be processed is stirred, the revolving speed of blender can be 120-180r/min, specific such as 120r/min, 140r/min,
150r/min, 160r/min, 180r/min etc., are not specifically limited herein.
Alkaline reagent can be at least one of NaOH, KOH etc..It should be pointed out that the addition of alkaline reagent be for
Offer OH-, to form hydroxide deposits in conjunction with the free state copper ion in waste water to be processed.Specific reaction equation are as follows:
Cu2++OH-→Cu(OH)2↓
Further, the pH value of waste water to be processed can be 9-10 after alkaline reagent is adjusted, and the first time of reaction can
Think 5-20min, specific such as 5min, 10min, 15min, 20min.
It should be pointed out that the step can carry out under stirring always, and it is formed by hydroxide deposits
Grain is smaller, to be suspended in waste water and form Kocide SD suspension.
Step S212: under agitation, when the first flocculant being added into Kocide SD suspension, and reacting second
Between, to flocculate to hydroxide deposits；
It should be pointed out that due to the hydroxide deposits in Kocide SD suspension obtained in step S211
Particle it is smaller, it is difficult to precipitating and separated with waste water.Can be used in this step the first flocculant to Kocide SD precipitating at
Reason, so that the sediment of larger particles is formed, in favor of the progress of precipitating.
Specifically, which can carry out in the first flocculation basin of above-mentioned first processing system, and blender specifically can be used
Waste water to be processed is stirred, the second revolving speed of blender can be 60-100r/min, specific such as 60r/min, 80r/min,
100r/min etc..
Wherein, the first flocculant can be polyacrylamide, and the concentration of used first flocculant can be 5mg/L
And mass fraction is 0.1%.
Second time of reaction can be 5-20min, and specific such as 5min, 10min, 15min, 20min do not do herein and have
Body limits.
In present embodiment, the first flocculant is added in the middle to Kocide SD suspension, principle of electroneutrality is utilized to eliminate hydrogen
The charge of copper oxide sediment so that being more easier to be combined together between hydroxide deposits, while utilizing " net
Catch " short grained hydroxide deposits are adhered to each other by principle, the hydroxide deposits of larger particles are formed, in favor of
Further precipitation process.
Step S213: precipitation process, and the hydroxide after removal flocculation are carried out to the hydroxide deposits after flocculation
Supernatant is obtained after copper sediment.
The step can carry out in the first sedimentation basin of above-mentioned first processing system, it should be pointed out that in the step simultaneously
Waste water to be processed is not stirred, but is deposited in the hydroxide deposits after flocculation voluntarily under the effect of gravity
The bottom of first sedimentation basin.Wherein, the load of the first sedimentation basin can be 0.5-1.0m3/(m2H), specific such as 0.5m3/
(m2·h)、0.7m3/(m2·h)、0.9m3/(m2·h)、1.0m3/(m2H) etc..
Specifically, after carrying out flocculation treatment to hydroxide deposits, waste water can be evacuated to the first sedimentation basin by pumping
In the middle, can specifically enter from the centre of the bottom of the first sedimentation basin, or from the top in the centre of the first sedimentation basin
Into, be not specifically limited herein, and after the completion of precipitation process, supernatant by the first sedimentation basin top overflow.
Step S22: carrying out contact break processing to the copper in complex state in supernatant, and makes copper in complex state reaction life
At solid sediment, solid sediment is removed, with the waste water that obtains that treated.
In present embodiment, the first place of settling is being carried out to the free state copper ion in waste water to be processed using alkaline reagent
After managing and obtaining supernatant, further the copper in complex state in supernatant is handled.And due to copper in complex state
Matter is relatively stable, it is difficult to be removed it using the method that Kocide SD precipitates, so that contact break processing need to be carried out, then further
Removal.Specifically, referring to Fig. 4, step S22 can include:
Step S221: under agitation, contact break reagent is added into the supernatant after adjusting pH value, when reacting third
Between, contact break processing is carried out to the copper in complex state in supernatant and copper in complex state reaction is made to generate solid sediment,
Obtain sediment suspension；
After pH of the step S221 to supernatant is adjusted, it will further adjust the supernatant after pH and be pumped into the
In two reaction tanks, to carry out contact break processing.
Specifically, the waste water in the second reaction tank is stirred using blender, wherein revolving speed can be 120-
180r/min, specific such as 120r/min, 140r/min, 150r/min, 160r/min, 180r/min.
Contact break reagent can be Na2S、K2At least one of S, the third time of reaction can be 5-20min, specifically such as
5min, 10min, 15min, 20min etc., are not specifically limited herein.
In present embodiment, contact break reagent uses Na2S、K2At least one of S, due to the combination of sulphion and copper ion
Ability is stronger than the ligand in copper in complex state, after vulcanized sodium is added in supernatant, carries out contact break to copper in complex state
While processing, copper ion generates the copper sulfide precipitation object more more stable than copper in complex state in conjunction with sulphion, chemical reaction
Formula are as follows: Cu2++S2-→CuS↓
Step S222: under agitation, coagulant and the second flocculant being added into sediment suspension, and react the
Four times, to flocculate to solid sediment；
Wherein, which can carry out in the second flocculation basin of above-mentioned processing unit, specifically sink with above-mentioned to Kocide SD
Starch flocculate similar.
Specifically, the second suspension in the second flocculation basin is stirred using blender, wherein blender turns
Speed can be 60-100r/min, specific such as 60r/min, 80r/min, 100r/min.
Coagulant can be at least one of aluminium polychloride, aluminum sulfate, ferrous sulfate, ferric trichloride etc., and concentration can
Think 50mg/L and mass fraction is 20%.
Second flocculant can be same or different with the first flocculant, is specifically as follows polyacrylamide, corresponding concentration
It can be 30-50mg/L, specific such as 30mg/L, 35mg/L, 40mg/L, 45mg/L, 50mg/L, and mass fraction is 0.1%.
Further, the 4th time of reaction can be 5-20min, specifically such as 5min, 10min, 15min, 20min,
It is not specifically limited herein.
In present embodiment, coagulant and the second flocculant are added in the second suspension, is eliminated using principle of electroneutrality
The charge of copper sulfide precipitation object so that being more easier to be combined together between copper sulfide precipitation object, while utilizing " net is caught "
Short grained copper sulfide precipitation object is adhered to each other by principle, to form the copper sulfide precipitation object of larger particles, in favor of into
The precipitation process of one step.
Step S223: precipitation process is carried out to the solid sediment after flocculation, and is obtained everywhere after removing solid sediment
Waste water after reason.
It should be pointed out that the step can be carried out in above-mentioned second sedimentation basin, and place is not stirred to waste water to be processed
Reason, but the copper sulfide precipitation object after flocculation is made voluntarily to be deposited in the bottom of the second sedimentation basin under the effect of gravity.Wherein, second
The load of sedimentation basin can be 0.5-1.0m3/(m2H), specific such as 0.5m3/(m2·h)、0.7m3/(m2·h)、0.9m3/
(m2·h)、1.0m3/(m2H) etc..
Specifically, after carrying out flocculation treatment to copper sulfide precipitation object, waste water can be evacuated to the second sedimentation basin by pump and worked as
In, can specifically enter from the centre of the bottom of the second sedimentation basin, or from the top in the centre of the second sedimentation basin into
Enter, be not specifically limited herein, and after precipitating completion processing, by the waste water after the top Overflow handling of the second sedimentation basin.
It should be pointed out that in above embodiment when removing the copper in complex state in waste water, the contact break examination of use
Agent is Na2S、K2S.In other embodiments, can also using ferrous sulfate contact break method to the copper in complex state in waste water into
Row contact break processing, and further remove the free state copper ion generated after contact break.
Specifically, after step S21, acid reagent can first be added in supernatant, supernatant is adjusted to acidity, In
Fe under acid condition, in ferrous sulfate2+With reproducibility, so as to which the cupric in supernatant is reduced into monovalence copper, and
Monovalence copper and NH3, the complex compound that is formed of the ligands such as EDTA it is just no longer stable, then alkaline reagent offer can be further provided
OH-, so that monovalence copper and OH-Reaction generates CuOH, and dehydration forms Cu in turn2O precipitating.With [Cu (NH3)4]2+For, reaction
Equation are as follows:
[Cu(NH3)4]2++Fe2++5OH-→Cu2O↓+Fe(OH)3↓+4NH3+H2O
It should be pointed out that in fact, hydroxide precipitation method is only capable of the free state copper ion in removal waste water, and sulfuric acid
Ferrous contact break method, vulcanized sodium (or potassium sulfide) contact break method can not only remove the free state copper ion in waste water, can also remove useless
Copper in complex state in water.However, reagent cost is hydrogen respectively from low to high from the perspective of removal free state copper ion
Oxide precipitation method, ferrous sulfate contact break method, vulcanized sodium (or potassium sulfide) contact break method, and from removal waste water in complex state copper from
From the perspective of son, the reagent cost of vulcanized sodium (or potassium sulfide) contact break method is minimum.
In printed circuit board complexing copper waste water, existing free state copper ion also has copper in complex state, therefore first uses
Hydroxide precipitation method removes free state copper ion, then removes copper in complex state using vulcanized sodium (or potassium sulfide) contact break method,
Reagent cost is minimum.
The processing method of the application printed wiring board waste water is illustrated with specific embodiment and comparative example below.
The complexing copper waste water of printed wiring board is taken, copper ion concentration 86mg/L, pH 1.8 is respectively adopted in the application
The processing method and ferrous sulfate contact break method and vulcanized sodium contact break method for stating waste water handle the above-mentioned waste water of equivalent, will
Cu in waste water ion is reduced to 0.5mg/L hereinafter, specific embodiment and comparative example are as follows.
Embodiment 1-3
It takes 1L that copper waste water is complexed respectively, pH value is adjusted to 9.5 with sodium hydroxide solution under agitation, then polypropylene
Amide stirs at a slow speed lasting stirring 2min, stands 10min, obtains supernatant, and further throw under agitation into supernatant
Add sodium sulfide solution, persistently stir 1min, then add aluminium polychloride, persistently stir 1min, adds polyacrylamide, so
10min is stood after stirring lasting stirring 2min at a slow speed afterwards, supernatant is taken to detect copper ion.
Comparative example 1 (ferrous sulfate method): it takes 1L that copper waste water is complexed, adds ferrous sulfate solution under agitation, and hold
Continue stirring 1min, then addition sodium hydroxide solution adjusting pH value to 9.5, and continue to stir 1min, adds polyacrylamide,
2min is mixed slowly, 10min is stood, supernatant is taken to detect copper ion.
Comparative example 2 (sodium sulfide method): taking 1L that copper waste water is complexed, and sodium hydroxide solution is added under agitation by pH value tune
To 9.5, sodium sulfide solution is then added, persistently stirs 1min, aluminium polychloride is further added, persistently stirs 1min, then plus
Enter polyacrylamide, mix slowly 2min, be then allowed to stand 10min, supernatant is taken to detect copper ion.
Each embodiment and comparative example concrete condition is as shown in table 1.
Table 1
Learnt from upper table data, meet copper ion be removed to 0.5mg/L it is below under the premise of, using the above-mentioned place of the application
Reason method averaging of income reagent cost is lower by 26.7%, 17.3% than ferrous sulfate contact break method, vulcanized sodium contact break method respectively.
The foregoing is merely presently filed embodiments, are not intended to limit the scope of the patents of the application, all to utilize this
Equivalent structure or equivalent flow shift made by application specification and accompanying drawing content, it is relevant to be applied directly or indirectly in other
Technical field similarly includes in the scope of patent protection of the application.
Claims (10)
1. a kind of processing method of printed wiring board waste water, which is characterized in that the treating method comprises:
Alkaline reagent is added into waste water to be processed, so that the reaction of free state copper ion generates hydrogen-oxygen in the waste water to be processed
Change copper sediment, and remove the hydroxide deposits, to obtain supernatant；
Contact break processing is carried out to the copper in complex state in the supernatant, and it is solid that the copper in complex state reaction is generated
Body sediment removes the solid sediment, with the waste water that obtains that treated.
2. processing method according to claim 1, which is characterized in that alkaline reagent is added into waste water to be processed, so that
It obtains free state copper ion reaction in the waste water to be processed and generates hydroxide deposits, and remove the Kocide SD precipitating
Object, the step of to obtain supernatant, comprising:
Under agitation, alkaline reagent is added into the waste water to be processed, adjusts the pH value of the waste water to be processed, and anti-
So that the reaction of free state copper ion generates hydroxide deposits in the waste water to be processed, hydroxide should be obtained at the first time
Copper suspension；
Under agitation, the first flocculant is added in Xiang Suoshu Kocide SD suspension, and reacted for the second time, to described
Hydroxide deposits are flocculated；
Precipitation process is carried out to the hydroxide deposits after flocculation, and is obtained after the hydroxide deposits after removal flocculation
The supernatant.
3. processing method according to claim 2, which is characterized in that under agitation, into the waste water to be processed
Alkaline reagent is added, adjusts the pH value of the waste water to be processed, and reacts at the first time, so that dissociating in the waste water to be processed
The step of reaction of state copper ion generates hydroxide deposits, obtains Kocide SD suspension, comprising:
In the case where speed of agitator is the stirring condition of 120-180r/min, it is added in NaOH, KOH extremely into the waste water to be processed
Few one kind, adjusts the pH value of the waste water to be processed, and reacts 5-20min so that in the waste water to be processed free state copper from
Son reaction generates hydroxide deposits, obtains Kocide SD suspension；
Under agitation, the first flocculant is added in Xiang Suoshu Kocide SD suspension, and reacted for the second time, to described
The step of hydroxide deposits are flocculated, comprising:
In the case where speed of agitator is the stirring condition of 60-100r/min, polyacrylamide is added in Xiang Suoshu Kocide SD suspension,
And 5-20min is reacted, to flocculate to the hydroxide deposits；
Precipitation process is carried out to the hydroxide deposits after flocculation, and is obtained after the hydroxide deposits after removal flocculation
The step of supernatant, comprising:
By the hydroxide deposits after flocculation in 0.5-1.0m3/(m2H) precipitation process is carried out under load, and is wadded a quilt with cotton in removal
The supernatant is obtained after hydroxide deposits after solidifying.
4. processing method according to claim 2, which is characterized in that under agitation, into the waste water to be processed
Alkaline reagent is added, adjusts the pH value of the waste water to be processed, and reacts at the first time, so that dissociating in the waste water to be processed
The step of reaction of state copper ion generates hydroxide deposits, obtains Kocide SD suspension, comprising:
In the case where speed of agitator is the stirring condition of 150r/min, NaOH is added into the waste water to be processed, adjusts described wait locate
The pH value for managing waste water is 9-10, and reacts 20min, so that the reaction of free state copper ion generates hydroxide in the waste water to be processed
Copper sediment obtains Kocide SD suspension；
Under agitation, the first flocculant is added in Xiang Suoshu Kocide SD suspension, and reacted for the second time, to described
The step of hydroxide deposits are flocculated, comprising:
In the case where speed of agitator is the stirring condition of 80r/min, 5mg/L and mass fraction are added in Xiang Suoshu Kocide SD suspension
For 0.1% polyacrylamide, and 20min is reacted, to flocculate to the hydroxide deposits；
Precipitation process is carried out to the hydroxide deposits after flocculation, and is obtained after the hydroxide deposits after removal flocculation
The step of supernatant, comprising:
By the hydroxide deposits after flocculation in 1.0m3/(m2H) precipitation process is carried out under load, and after removal flocculation
Hydroxide deposits after obtain the supernatant.
5. processing method according to claim 1, which is characterized in that carried out to the copper in complex state in the supernatant
Contact break processing, and the copper in complex state reaction is made to generate solid sediment, the solid sediment is removed, to obtain everywhere
The step of waste water after reason, comprising:
Under agitation, contact break reagent is added into the supernatant after adjusting pH value, the third time is reacted, on described
Copper in complex state in clear liquid carries out contact break processing and the copper in complex state reaction is made to generate the solid sediment,
Obtain sediment suspension；
Under agitation, coagulant and the second flocculant are added in Xiang Suoshu sediment suspension, and reacted for the 4th time, with
It flocculates to the solid sediment；
Precipitation process is carried out to the solid sediment after flocculation, and obtains the processing after removing the solid sediment
Waste water afterwards.
6. processing method according to claim 5, which is characterized in that under agitation, to adjust pH value after described in
Contact break reagent is added in supernatant, reacts the third time, contact break processing is carried out simultaneously to the copper in complex state in the supernatant
So that the step of copper in complex state reaction generates the solid sediment, obtains sediment suspension, comprising:
In the case where speed of agitator is the stirring condition of 120-180r/min, Na is added in Xiang Suoshu supernatant2S、K2At least one in S
Kind, 5-20min is reacted, contact break processing is carried out to the copper in complex state and makes copper in complex state in the supernatant anti-
Copper sulfide precipitation object should be generated, copper sulfide suspension is obtained；
Under agitation, coagulant and the second flocculant are added in Xiang Suoshu sediment suspension, and reacted for the 4th time, with
The step of flocculating to the solid sediment, comprising:
It is sub- that aluminum sulfate, sulfuric acid are added in the case where speed of agitator is the stirring condition of 60-100r/min, in Xiang Suoshu copper sulfide suspension
At least one of iron, ferric trichloride, aluminium polychloride and polyacrylamide, and 5-20min is reacted, with heavy to the copper sulfide
Starch is flocculated；
Precipitation process is carried out to the solid sediment after flocculation, and obtains the processing after removing the solid sediment
The step of rear waste water, comprising:
By the solid sediment after flocculation in 0.5-1.0m3/(m2H) precipitation process is carried out under load, and in removal institute
It states and obtains treated the waste water after solid sediment.
7. processing method according to claim 5, which is characterized in that under agitation, be added in Xiang Suoshu supernatant
Alkaline reagent, to adjust the pH value of the supernatant, and the step of reacting, comprising:
In the case where speed of agitator is the stirring condition of 150r/min, NaOH is added in Xiang Suoshu supernatant, by the supernatant
PH value is adjusted to 9.5-10, and reacts 20min；
Under agitation, contact break reagent is added into the supernatant after adjusting pH value, the third time is reacted, on described
Copper in complex state in clear liquid carries out contact break processing and the copper in complex state reaction is made to generate the solid sediment,
The step of obtaining sediment suspension, comprising:
In the case where speed of agitator is the stirring condition of 150r/min, Na is added in Xiang Suoshu supernatant2S reacts 20min, on described
Copper in complex state in clear liquid carries out contact break processing and the copper in complex state reaction is made to generate copper sulfide precipitation object, obtains
To copper sulfide suspension；
Under agitation, coagulant and the second flocculant are added in Xiang Suoshu sediment suspension, and reacted for the 4th time, with
The step of flocculating to the copper sulfide precipitation object, comprising:
In the case where speed of agitator is the stirring condition of 80r/min, 50mg/L and mass fraction are added in Xiang Suoshu copper sulfide suspension
The polyacrylamide that aluminium polychloride and 50mg/L and mass fraction for 20% are 0.1%, and 20min is reacted, to described
Copper sulfide precipitation object flocculates；
Precipitation process is carried out to the solid sediment after flocculation, and obtains the processing after removing the solid sediment
The step of rear waste water, comprising:
By the solid sediment after flocculation in 1.0m3/(m2H) precipitation process is carried out under load, and described solid removing
Treated the waste water is obtained after body sediment.
8. a kind of processing unit of printed wiring board waste water, which is characterized in that the processing unit include the first processing system and
Second processing system；
Wherein, first processing system is used for, by the way that alkaline reagent is added into waste water to be processed, so that described to be processed
The reaction of free state copper ion generates hydroxide deposits in waste water, and removes the hydroxide deposits, to obtain supernatant
Liquid；
Second processing system is used for, and carries out contact break processing to the copper in complex state in the supernatant, and make the complexing
The reaction of state copper ion generates solid sediment, removes the solid sediment, with the waste water that obtains that treated.
9. processing unit according to claim 8, which is characterized in that first processing system include the first reaction tank,
First flocculation basin and the first sedimentation basin；
Wherein, first reaction tank is used for, and under agitation, alkaline reagent is added into the waste water to be processed, is adjusted
The pH value of the waste water to be processed, and react at the first time, so that the reaction of free state copper ion generates in the waste water to be processed
Hydroxide deposits obtain Kocide SD suspension；
First flocculation basin is used for, and under agitation, the first flocculant is added in Xiang Suoshu Kocide SD suspension, and anti-
Answered for the second time, to flocculate to the hydroxide deposits；
First sedimentation basin is used for, and carries out precipitation process to the hydroxide deposits after flocculation, and after removal flocculation
The supernatant is obtained after hydroxide deposits.
10. processing unit according to claim 8, which is characterized in that the second processing system include the second reaction tank,
Second flocculation basin and the second sedimentation basin；
Wherein, second reaction tank is used for, and under agitation, contact break examination is added into the supernatant after adjusting pH value
Agent, react the third time, in the supernatant copper in complex state carry out contact break processing and make the complex state copper from
Son reaction generates the solid sediment, obtains sediment suspension；
Second flocculation basin is used for, and coagulant and the second flocculation are added under agitation, in Xiang Suoshu sediment suspension
Agent, and reacted for the 4th time, to flocculate to the solid sediment；
Second sedimentation basin is used for, and carries out precipitation process to the solid sediment after flocculation, and removing the solid
Treated the waste water is obtained after sediment.
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