CN109052732A - A method of COD, SS, total phosphorus and ammonia nitrogen in the removal painting wastewater based on Fenton oxidation and coagulation-settlement process - Google Patents
A method of COD, SS, total phosphorus and ammonia nitrogen in the removal painting wastewater based on Fenton oxidation and coagulation-settlement process Download PDFInfo
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- CN109052732A CN109052732A CN201811084279.0A CN201811084279A CN109052732A CN 109052732 A CN109052732 A CN 109052732A CN 201811084279 A CN201811084279 A CN 201811084279A CN 109052732 A CN109052732 A CN 109052732A
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- ammonia nitrogen
- total phosphorus
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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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- 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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
A method of COD, SS, total phosphorus and ammonia nitrogen in the removal painting wastewater based on Fenton oxidation and coagulation-settlement process, the present invention relates to the processing methods of painting wastewater.The present invention is to solve the existing painting wastewater processing difficulty containing COD, SS, total phosphorus and ammonia nitrogen is big, the high technical problem of operating cost.This method: one, Fenton oxidation is handled, wherein with the Fenton reagent that ferrous sulfate and hydrogen peroxide form, or with ferrous sulfate, hydrogen peroxide, aluminium oxide forms Fenton reagent；Two, flocculation sedimentation is handled；Three, sand filtration is handled.Method of the invention makes the removal rate of COD in painting wastewater up to the removal rate of 93~96.5%, SS up to 81~85%, and ammonia nitrogen removal frank is up to 53~58%, and total tp removal rate is up to 90~95%.It can be used for handling field of waste water treatment.
Description
Technical field
The present invention relates to the processing methods of painting wastewater, belong to field of industrial waste water treatment.
Background technique
Spray painting operation is an industrial important link, dirt of the painting wastewater to water resource caused by spray painting operation
Dye is aggravated also with expanding economy.Painting wastewater is mainly derived from wet type spray chamber and paint spray booth operation area sky is washed with water
Gas paints object in air and organic solvent is transferred to the painting wastewater formed in water.The coating cloud and extra paint generated when spray painting
Middle pollutant component is mainly epoxy resin, polyamide, dimethylbenzene, methylbutyraldehyd ketone, butanol etc., containing a large amount of paint objects in waste water
Grain, depending on water quality is by coating used, solvent and auxiliary agent, typically contains COD, SS and total phosphorus of high concentration etc., difficult in the environment
Degradation, it is also harmful to body if direct emission will cause the pollution of water body.During processing, painting wastewater is due to it
The particularity of water quality, so not only be easy to causeing equipment damage, with high costs but also processing using traditional sewage disposal device
It is ineffective.
The processing method of present painting wastewater mainly has biological oxidation process, coagulant sedimentation, chemical oxidization method and coating cloud solidifying
Poly- agent method etc..The wastewater produced water quality of various processes is different, and adoptable process combination is also different.Biological oxidation process efficiency
Higher and adaptable to the sharply variation of load, surplus sludge volume is few, but cannot be any by means of the variation of operating condition
The efficiency of ground conditioning biomass and device；Coagulant sedimentation can effectively remove suspended matter, but not have for pollutant soluble in water
Have a too big removal effect, generally not single use, when frequently as obtaining a link in treatment process；Using chemical oxidization method
Have the characteristics that removal rate is high, occupied area is small, but a large amount of medicaments and thermal energy need to be consumed, operating cost is high, and the reagent pair having
There is pollution in environment；It must subsequent other treatment process ability qualified discharge using lacquer mist coagulant method.
Summary of the invention
The present invention is to solve the existing painting wastewater processing difficulty containing COD, SS, total phosphorus and ammonia nitrogen is big, operating cost
High technical problem, and COD, SS, total phosphorus in a kind of removal painting wastewater based on Fenton oxidation and coagulation-settlement process are provided
With the method for ammonia nitrogen, to realize recycling for waste water, save the cost.
COD, SS, total phosphorus and ammonia in a kind of removal painting wastewater based on Fenton oxidation and coagulation-settlement process of the invention
The method of nitrogen, comprising the following steps:
One, Fenton oxidation: painting wastewater to be processed is adjusted into pH to 4~4.5 with hydrochloric acid solution, it is sub- that sulfuric acid is then added
The Fenton reagent of iron and hydrogen peroxide composition, wherein the concentration of ferrous sulfate is 1~1.2g/L, the concentration of hydrogen peroxide in painting wastewater
For 5~8mL/L, 1.2~1.5h is aoxidized under agitation, after oxidation, with sodium hydroxide solution tune pH to neutrality, is completed
Oxidation；
Two, flocculation sedimentation: the painting wastewater handled through step 1 is stirred 1 quickly with the revolving speed of 400~500r/min~
1.5min, then 10~12min is mixed slowly with the revolving speed of 100~150r/min, it is then allowed to stand precipitating 0.5~0.7 hour, completes
Flocculation treatment；
Three, sand filtration: sand filtration will be carried out through step 2 treated painting wastewater, and will complete the processing of painting wastewater.
The present invention has the following advantages compared with the existing painting wastewater processing method containing COD, SS, total phosphorus and ammonia nitrogen:
1) removal effect is good: the present invention finally uses flocculation sedimentation and filters off deoxygenation first by adding Fenton reagent
Precipitating after change so that the removal rate of COD is up to the removal rate of 93~96.5%, SS up to 81~85%, ammonia nitrogen removal frank up to 53~
58%, total tp removal rate is up to 90~95%.
2) operating cost is low: present invention employs Fenton oxidation+flocculation sedimentation+sand filter filtration treatment painting wastewaters, only
There is the stirring in step of flocculation precipitation and Fenton oxidation step to need to consume energy, during Fenton oxidation, reagent it is adding less, and
Step of flocculation precipitation does not need to add flocculant, adjusts resulting iron hydroxide after pH to flocculate using oxidation, reagent dosage is significantly
It reduces.
3) investment cost is few: present invention employs Fenton oxidation+flocculation sedimentation+sand filter filtration treatment painting wastewater, works
Skill process is simple, and occupied area is small, therefore investment is substantially reduced.
4) can be recycled: after painting wastewater is processed by the invention, COD, SS isoconcentration in water outlet are significantly reduced, water outlet
It can satisfy that paint spray booth is limpid, the reuse requirement of odorless realizes recycling for waste water.
It is big that the present invention efficiently solves the painting wastewater processing difficulty containing COD, SS, total phosphorus and ammonia nitrogen, and operating cost is high, if
It is standby to invest big problem, the efficient removal of COD, SS, total phosphorus and ammonia nitrogen is realized, is conducive to promote and apply.
Detailed description of the invention
Fig. 1 is the removal effect figure of COD in embodiment 1；
Fig. 2 is the removal effect figure of SS in embodiment 1；
Fig. 3 is the removal effect figure of total phosphorus in embodiment 1；
Fig. 4 is the removal effect figure of ammonia nitrogen in embodiment 1.
Specific embodiment
Specific embodiment 1: a kind of removal spray painting based on Fenton oxidation and coagulation-settlement process of present embodiment is useless
The method of COD, SS, total phosphorus and ammonia nitrogen in water, comprising the following steps:
One, Fenton oxidation: painting wastewater to be processed is adjusted into pH to 4~4.5 with hydrochloric acid solution, it is sub- that sulfuric acid is then added
The Fenton reagent of iron and hydrogen peroxide composition, wherein the concentration of ferrous sulfate is 1~1.2g/L, the concentration of hydrogen peroxide in painting wastewater
For 5~8mL/L, 1.2~1.5h is aoxidized under agitation, after oxidation, with sodium hydroxide solution tune pH to neutrality, is completed
Oxidation；
Two, flocculation sedimentation: the painting wastewater handled through step 1 is stirred 1 quickly with the revolving speed of 400~500r/min~
1.5min, then 10~12min is mixed slowly with the revolving speed of 100~150r/min, it is then allowed to stand precipitating 0.5~0.7 hour, completes
Flocculation treatment；
Three, sand filtration: sand filtration will be carried out through step 2 treated painting wastewater, and will complete the processing of painting wastewater.
Specific embodiment 2: the present embodiment is different from the first embodiment in that the acid solution hydrochloric acid solution
Concentration be 1~1.2mol/L.It is other same as the specific embodiment one.
Specific embodiment 3: the present embodiment is different from the first and the second embodiment in that in step 3 sand filtration be with
Natural siliceous sand is as filtrate；It is other the same as one or two specific embodiments.
Specific embodiment 4: the present embodiment is different from the first and the second embodiment in that natural quartz in step 3
The partial size of sand is 0.8~1.2mm；It is other the same as one or two specific embodiments.
Specific embodiment 5: the present embodiment is different from the first and the second embodiment in that painting wastewater in step 1
After adjusting pH to 4~4.5, after ferrous sulfate and hydrogen peroxide is added, it is also added into aluminium oxide, the concentration of aluminium oxide in painting wastewater
For 5~10g/L；It is other the same as one or two specific embodiments.
Aluminium oxide is added as catalyst carrier in present embodiment in Fenton oxidation system, make iron in painting wastewater from
Son is replaced and is immobilized on molecular surface catalytic decomposition hydrogen peroxide, improves oxidation effectiveness.
Beneficial effects of the present invention are verified with embodiment below:
Embodiment 1: COD in a kind of removal painting wastewater based on Fenton oxidation and coagulation-settlement process of the present embodiment,
The method of SS, total phosphorus and ammonia nitrogen, sequentially include the following steps:
One, Fenton oxidation: taking 200ml painting wastewater to be added in 500mL beaker, is that 1mol/L hydrochloric acid tune ph is with concentration
4,0.2g ferrous sulfate is added, 1mL hydrogen peroxide, so that ferrous sulfate concentration in water sample is 1g/L, hydrogen peroxide is dense in water sample
Degree after mixing, aoxidizes 1.5h for 5mL/L, and after oxidation, the sodium hydroxide tune ph for being 1mol/L with concentration is 7, completes
Oxidation；
Two, flocculation sedimentation: quickly stirring 1min for the painting wastewater water sample after oxidation with the revolving speed of 400r/min, then with
The revolving speed of 100r/min mixes slowly 10min, is then allowed to stand precipitating 0.5 hour, completes flocculation treatment；
Three, sand filtration: painting wastewater water sample is filtered by sand filter after the flocculation obtained to step 2, wherein in sand filter
Filtrate is the natural siliceous sand that partial size is 0.8~1.2mm, completes water process, water outlet.
The COD of the painting wastewater raw water of the present embodiment is 1000mg/L, SS 200mg/L, total phosphorus 0.36mg/L, ammonia nitrogen
For 7.2mg/L.
The removal effect figure of the COD of the painting wastewater of the present embodiment is as shown in Figure 1, it will be seen from figure 1 that COD after oxidation
Removal rate reaches 90%, and the removal rate of COD is up to 94% after flocculation sedimentation.The removal effect of the SS of the painting wastewater of the present embodiment is such as
Shown in Fig. 2, figure it is seen that SS removal rate reaches 30% after oxidation, after flocculation sedimentation, SS removal rate reaches 60%, sand filtration
The removal rate of SS is up to 82% afterwards.The removal effect of the total phosphorus of the painting wastewater of the present embodiment as shown in figure 3, from figure 3, it can be seen that
The removal rate of total phosphorus reaches 86% after oxidation.The removal effect of the ammonia nitrogen of the painting wastewater of the present embodiment is as shown in figure 4, from Fig. 4
As can be seen that the removal rate of ammonia nitrogen reaches 34% after oxidation, the removal rate of ammonia nitrogen is up to 54% after sand filtration.The method of the present embodiment is real
The synchronous removal of COD, SS, total phosphorus and ammonia nitrogen is showed.
Embodiment 2: COD in a kind of removal painting wastewater based on Fenton oxidation and coagulation-settlement process of the present embodiment,
The method of SS, total phosphorus and ammonia nitrogen, sequentially include the following steps:
One, Fenton oxidation: taking 200ml painting wastewater to be added in 500mL beaker, is that 1mol/L hydrochloric acid tune ph is with concentration
4,0.2g ferrous sulfate, 1mL hydrogen peroxide, 2g aluminium oxide is added, so that ferrous sulfate concentration in water sample is 1g/L, hydrogen peroxide exists
Concentration is 5mL/L in water sample, and concentration of the aluminium oxide in water sample is 10g/L, after mixing, aoxidizes 1.5h, after oxidation,
The sodium hydroxide tune ph for being 1mol/L with concentration is 7, completes oxidation；
Two, flocculation sedimentation: quickly stirring 1min for the painting wastewater water sample after oxidation with the revolving speed of 400r/min, then with
The revolving speed of 100r/min mixes slowly 10min, is then allowed to stand precipitating 0.5 hour, completes flocculation treatment；
Three, sand filtration: painting wastewater water sample is filtered by sand filter after the flocculation obtained to step 2, wherein in sand filter
Filtrate is the natural siliceous sand that partial size is 0.8~1.2mm, completes water process, water outlet.
The COD of the painting wastewater raw water of the present embodiment is 1000mg/L, SS 200mg/L, total phosphorus 0.36mg/L, ammonia nitrogen
For 7.2mg/L.
The painting wastewater of the present embodiment, COD removal rate reaches 92%, SS removal rate and reaches going for 32%, total phosphorus after oxidation
Except rate is up to the removal rate of 93%, ammonia nitrogen up to 35%；After flocculation sedimentation, the removal rate of COD reaches 66% up to 96%, SS removal rate,
The removal rate of total phosphorus is up to the removal rate of 94%, ammonia nitrogen up to 37%；The removal rate of the removal rate of COD up to 96.5%, SS reach after sand filtration
85%, the removal rate that the removal rate of total phosphorus reaches 95%, ammonia nitrogen reaches 58%.The present embodiment joined oxygen in the Fenton oxidation stage
Change aluminium as catalyst carrier, be replaced the iron ion in painting wastewater and be immobilized on molecular surface catalytic decomposition hydrogen peroxide,
Oxidation effectiveness is improved, the present embodiment realizes the efficient removal of COD, SS, total phosphorus and ammonia nitrogen.
Claims (5)
1. a kind of method of COD, SS, total phosphorus and ammonia nitrogen in removal painting wastewater based on Fenton oxidation and coagulation-settlement process,
It is characterized in that method includes the following steps:
One, Fenton oxidation: adjusting pH to 4~4.5 for painting wastewater to be processed with hydrochloric acid solution, be then added ferrous sulfate and
The Fenton reagent of hydrogen peroxide composition, wherein the concentration of ferrous sulfate is 1~1.2g/L in painting wastewater, and the concentration of hydrogen peroxide is 5
~8mL/L aoxidizes 1.2~1.5h under agitation, after oxidation, with sodium hydroxide solution tune pH to neutrality, completes oxygen
Change；
Two, flocculation sedimentation: the painting wastewater handled through step 1 is stirred 1 quickly with the revolving speed of 400~500r/min~
1.5min, then 10~12min is mixed slowly with the revolving speed of 100~150r/min, it is then allowed to stand precipitating 0.5~0.7 hour, completes
Flocculation treatment；
Three, sand filtration: sand filtration will be carried out through step 2 treated painting wastewater, and will complete the processing of painting wastewater.
2. COD in a kind of removal painting wastewater based on Fenton oxidation and coagulation-settlement process according to claim 1,
The method of SS, total phosphorus and ammonia nitrogen, it is characterised in that the concentration of the acid solution hydrochloric acid solution is 1~1.2mol/L.
3. in a kind of removal painting wastewater based on Fenton oxidation and coagulation-settlement process according to claim 1 or 2
The method of COD, SS, total phosphorus and ammonia nitrogen, it is characterised in that sand filtration is with natural siliceous sand as filtrate in step 3.
4. COD in a kind of removal painting wastewater based on Fenton oxidation and coagulation-settlement process according to claim 3,
The method of SS, total phosphorus and ammonia nitrogen, it is characterised in that the partial size of natural siliceous sand is 0.8~1.2mm in step 3.
5. in a kind of removal painting wastewater based on Fenton oxidation and coagulation-settlement process according to claim 1 or 2
The method of COD, SS, total phosphorus and ammonia nitrogen, it is characterised in that after painting wastewater adjusts pH to 4~4.5 in step 1, it is sub- that sulfuric acid is added
After iron and hydrogen peroxide, it is also added into aluminium oxide, the concentration of aluminium oxide is 5~10g/L in painting wastewater.
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| CN201811084279.0A CN109052732A (en) | 2018-09-18 | 2018-09-18 | A method of COD, SS, total phosphorus and ammonia nitrogen in the removal painting wastewater based on Fenton oxidation and coagulation-settlement process |
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| CN201811084279.0A CN109052732A (en) | 2018-09-18 | 2018-09-18 | A method of COD, SS, total phosphorus and ammonia nitrogen in the removal painting wastewater based on Fenton oxidation and coagulation-settlement process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110759532A (en) * | 2019-11-07 | 2020-02-07 | 山东鑫动能锂电科技有限公司 | High-salt concentrated water treatment process for producing iron phosphate by sodium method |
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| CN110759532A (en) * | 2019-11-07 | 2020-02-07 | 山东鑫动能锂电科技有限公司 | High-salt concentrated water treatment process for producing iron phosphate by sodium method |
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