CN101549921A - Method for treating high-concentration phosphorus-contained wastewater - Google Patents
Method for treating high-concentration phosphorus-contained wastewater Download PDFInfo
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- CN101549921A CN101549921A CNA2009100272217A CN200910027221A CN101549921A CN 101549921 A CN101549921 A CN 101549921A CN A2009100272217 A CNA2009100272217 A CN A2009100272217A CN 200910027221 A CN200910027221 A CN 200910027221A CN 101549921 A CN101549921 A CN 101549921A
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Abstract
The invention relates to a method for treating high-concentration phosphorus-contained wastewater, which includes following steps: phosphorus-contained wastewater and Ca (OH)2 solution are added into a swirling reactor simultaneously to carry out chemical reaction; the reacted wastewater flows into a flocculating settling pond, and AL2O3 solution and the solution with the concentration of PAM are added simultaneously and stirred for 30 minutes to 60 minutes for mixing reaction, settling and filtering processes are carried out; the processed wastewater passes through a sand filter and is discharged into a dissolved gas tower; the wastewater is aerated in the dissolved gas tower by a fan and subjected to combination reaction so as to break down and change the molecular structure of phosphorus, then flows into a secondary settling pond and AL2O3 solution is added simultaneously, and secondary settling and filtering processes are carried out after the chemical reaction; after the secondary settling and filtering processes, the wastewater flows into a filtering basin for being filtered and then is discharged out from a recycling water pond; and phosphorus content in the discharged water is 3 mg/L to 5 mg/L. The method has the advantages of low cost, excellent treatment effect and simple process; in addition, the solid material can be recycled and used as the additive of agriculture fertilizer.
Description
Technical field
The present invention relates to a kind of process for treating industrial waste water, particularly a kind of method of handling high-concentration phosphorus-containing wastewater.
Background technology
Along with the growth of world population and developing rapidly of industrial and agricultural production, the especially emergence of petrochemical complex makes the chemical substance of considerable complexity enter water body, has polluted water quality.To the sixties in 20th century whole world water quality eutrophication very outstanding, after people recognized ammonia nitrogen and the effect of phosphorus to the water quality eutrophication, the processing target of waste water just developed into to remove the stage of organism and nitrogen phosphorus.Since the eighties, along with the sharpening day by day of nitrogen and phosphorus pollution problem and the reinforcement of Public Environmental Awareness, quite strict sewage and waste water nitrogen phosphorus emission standard has been formulated in more and more countries and area.Especially in the period of nearly 20～30, more and more tighter to the discharging of nitrogen phosphorus, allow the quantity and the concentration of discharging also more and more lower.The content of examination of nitrogen phosphorus also has single ammonia nitrogen index to develop into the total nitrogen index, and the index of phosphorus is developed into the performance assessment criteria of total phosphorus by phosphoric acid salt.The dephosphorization denitrogenation technology of sewage and waste water has become the focus of studying and using in the sewage and waste water process field.The main harm of the polluted-water of holophytic nutrition is to make body eutrophication, because the frequent increase of holophytic nutrition thing in the water body, cause algae and other planktonic rapid breedings, the water body dissolved oxygen content descends, fish kill, water quality deterioration, fouling gives off a peculiar smell, (with the red algae of blue-green algae is representative, and rivers, lake mainly are blue-green algaes, and the offshore waters, ocean mainly are red algaes if the drinking water source is by holophytic nutritionization.) pollute and eutrophication, that then can give the waterworks brings very burden to water treatment, even the short-term unable to drink is used.The blue-green algae that the end of spring and the beginning of summer in 2007 Taihu Lake takes place is drawn out and eutrophication is exactly the most representative the most serious eutrophication matters of aggravation.
The permission emission concentration of regulation primary standard total phosphorus is that the A standard in the regulation primary standard is that the permission emission concentration of total phosphorus is 0.5mg/L in 1.0mg/L. China GB GB18918-2002 in 2002 standard for the 0.5mg/L. secondary in China integrated wastewater discharge standard GB GB8978-96 standard.The B standard is that the industrial circulating cooling water water quality standard GB50335-2002 standard of 1.0mg/L. China is that 1mg/L and 10mg/L.1mg/L mainly refer to copper and stainless heat exchanger.The phosphoric compound can be divided into orthophosphoric acid salt PO
4 3-, HPO
4 2-, H
2PO
4 -Condensed phosphate---comprise pyrophosphate salt, metaphosphate and polymeric phosphate etc. are as P
2O
7 4-, P
3O
10 5-, HP
3O
9 2-, (PO
3)
6 3-Deng organo phosphorous compounds, the summation of above-mentioned P contained compound is referred to as total phosphorus.It is the important water-quality guideline of individual event.Foreign scholar Xin Dele (shindler) is the restrictive substance of phosphorus as eutrophication; USEPA (EPA) in the investigation of national eutrophication with phosphorus as judge index, and the total phosphorus (in P) that regulation flows into lake, reservoir, river must not surpass 50mg/L. can disturb the water treatment plant when always above 100mg/L flocculation process.
China is to preventing body eutrophication, concrete regulation the standard value in several classes waters be industry: 0.02mg/L, II class lake and reservoir 0.025mg/L, river: 0.1mg/L, III class lake, reservoir: 0.05mg/L, IV class 0.2mg/L, V class 0.2mg/L.Contain total phosphorus in the town sewage and be generally less than 10mg/L, also the having of minority above 10mg/L, but below 20mg/L.Because town sewage is handled the overwhelming majority and is adopted activated sludge process and variation method thereof, total phosphorus can be reduced 30-40% in biological denitrification phosphorous removal technique, generally is no more than 50%, is difficult to reach 1mg/L or 0.5mg/L.
Therefore in biological treatment for making treat effluent reach emission standard, also need to increase chemical phosphorus removal method and finally handle.Make water outlet reach emission standard, method according to present processing phosphorus-containing wastewater, waste water has nearly ten kinds, as coagulant sedimentation, absorption method, membrane separation process, extraction process, chemical method, electrolytic oxidation, algae facture, floating layer filter bed method, iron-oxidizing bacterium deposition microcosmic salt method, biochemical treatment process etc.But the most frequently used physics method, chemical method and biological biochemistry method etc.The phosphorus denitrogenation processing that great majority carry out in order to reach emission standard and to require have certain effect to unicity phosphorus-containing wastewater, waste water, but the time just have defective and deficiency for the processing of Combination phosphorus plyability phosphorus.
Summary of the invention
Goal of the invention: the present invention is directed to the deficiencies in the prior art, provide a kind of phosphorous chemical industry manufacturing enterprise existing resources of utilizing to accomplish zero release, phosphorus-containing wastewater after handling is back to production, fully recycle, the conserve water resource reduces a kind of phosphorus-contained wastewater treating method of the running cost of enterprise simultaneously.
Technical scheme: a kind of method of handling high-concentration phosphorus-containing wastewater, it is characterized in that, comprise, phosphorus-containing wastewater is added Vortex reactor, add Ca (OH) simultaneously
2Solution carries out chemical reaction, described Ca (OH)
2The mass ratio of solution and treating water is 6-8: 200; Again reacted wastewater is flowed into flocculation sedimentation tank, add AL simultaneously
2O
3Solution and PAM solution mix reaction, sedimentation and filtration, described AL through 30-60Min
2O
3The mass ratio of solution and treating water is 1-4: 1000, and the mass ratio of described PAM solution and treating water is 1-2: 2000; Waste water behind the sedimentation and filtration is entered molten gas tower by sand filter, waste water in molten gas tower through gas blower inflation, carry out combination reaction decompose change the phosphorus molecular structure after, flow into secondary sedimentation basins, add AL simultaneously
2O
3Solution, after chemical reaction is carried out secondary sedimentation and is filtered described AL
2O
3The mass ratio of solution and treating water is 1-4: 1000; The filtering waste water of secondary sedimentation is flowed into filtering basin filter, discharge through reuse pool.When treating water hardness is higher, treating water is entered water tank, use ion-exchanger to remove and handle water hardness, enter the effluent reuse water spot, the treating water that the effluent reuse water spot is discharged can carry out reuse.
The sewage sludge waste slag that produces behind the sedimentation and filtration in the Removal of Phosphorus in Wastewater process enters sludge thickener, is processed into the mud cake outward transport through the sludge press filtration machine, can be used for agricultural compound fertilizer after the mud cake drying.
Beneficial effect: phosphorus-contained wastewater treating method provided by the invention, can reach the standard that requires of national phosphorous chemical industry enterprise reuse technology water, can handle the phosphorus content that produces in the phosphorous chemical industry manufacturing enterprise production process high-concentration phosphorus-containing wastewater at 400-2000mg/L, fill the domestic gaps, can recycle phosphorus-containing wastewater, recyclable farming is fertile, saves enterprise cost.
Description of drawings
Accompanying drawing is a kind of method process flow sheet of handling high-concentration phosphorus-containing wastewater.
Embodiment
Embodiment 1:
The phosphorus-containing wastewater that uses certain phosphorous chemical industry enterprise of this art breading to produce, water quality: PH=6.2 before handling; Total phosphorus=400mg/L; COD=108mg/L; CaCo
3=190MMOL/L.
Phosphorus-containing wastewater is added Vortex reactor, add Ca (OH) simultaneously
2Solution carries out chemical reaction, described Ca (OH)
2The mass ratio of solution and treating water is 6: 200; Again reacted wastewater is flowed into flocculation sedimentation tank, add AL simultaneously
2O
3Solution and PAM solution mix reaction, sedimentation and filtration, described AL through 30Min
2O
3The mass ratio of solution and treating water is 2: 1000, and the mass ratio of described PAM solution and treating water is 2: 2000; Waste water behind the sedimentation and filtration is entered molten gas tower by sand filter, waste water in molten gas tower through gas blower inflation, carry out combination reaction decompose change the phosphorus molecular structure after, flow into secondary sedimentation basins, add AL simultaneously
2O
3Solution, after chemical reaction is carried out secondary sedimentation and is filtered described AL
2O
3The mass ratio of solution and treating water is 2: 1000; The filtering waste water of secondary sedimentation is flowed into filtering basin filter, discharge through reuse pool.When treating water hardness is higher, treating water is entered water tank, use ion-exchanger to remove and handle water hardness, enter the effluent reuse water spot, the treating water that the effluent reuse water spot is discharged can carry out reuse.
Effluent quality is: PH=7.4; Total phosphorus=3.2mg/L, clearance 99.2%; COD=31mg/L, clearance 71.29%; CaCo
3=0.028MMOL/L, clearance 99.98%.Effluent quality meets the requirement of phosphorous chemical industry enterprise reuse technology water fully, the sewage sludge waste slag that produces behind the sedimentation and filtration in the Removal of Phosphorus in Wastewater process enters sludge thickener, be processed into the mud cake outward transport through the sludge press filtration machine, can be used for agricultural compound fertilizer after the mud cake drying.
Embodiment 2:
The phosphorus-containing wastewater that uses certain phosphorous chemical industry enterprise of this art breading to produce, water quality: PH=6.2 before handling; Total phosphorus=1228mg/L; COD=80mg/L; CaCo
3=300MMOL/L.
Phosphorus-containing wastewater is added Vortex reactor, add Ca (OH) simultaneously
2Solution carries out chemical reaction, described Ca (OH)
2The mass ratio of solution and treating water is 6: 200; Again reacted wastewater is flowed into flocculation sedimentation tank, add AL simultaneously
2O
3Solution and PAM solution mix reaction, sedimentation and filtration, described AL through 30Min
2O
3The mass ratio of solution and treating water is 2: 1000, and the mass ratio of described PAM solution and treating water is 2: 2000; Waste water behind the sedimentation and filtration is entered molten gas tower by sand filter, waste water in molten gas tower through gas blower inflation, carry out combination reaction decompose change the phosphorus molecular structure after, flow into secondary sedimentation basins, add AL simultaneously
2O
3Solution, after chemical reaction is carried out secondary sedimentation and is filtered described AL
2O
3The mass ratio of solution and treating water is 2: 1000; The filtering waste water of secondary sedimentation is flowed into filtering basin filter, discharge through reuse pool.When treating water hardness is higher, treating water is entered water tank, use ion-exchanger to remove and handle water hardness, enter the effluent reuse water spot, the treating water that the effluent reuse water spot is discharged can carry out reuse.
Effluent quality is: PH=7.6; Total phosphorus=3mg/L, clearance 99.67%; COD=35mg/L, clearance 56.25%; CaCo
3=0.03MMOL/L, clearance 99.91%.Effluent quality meets the requirement of phosphorous chemical industry enterprise reuse technology water fully, the sewage sludge waste slag that produces behind the sedimentation and filtration in the Removal of Phosphorus in Wastewater process enters sludge thickener, be processed into the mud cake outward transport through the sludge press filtration machine, can be used for agricultural compound fertilizer after the mud cake drying.
Embodiment 3
The phosphorus-containing wastewater that uses certain phosphorous chemical industry enterprise of this art breading to produce, water quality: PH=6.2 before handling; Total phosphorus=2000mg/L; COD=120mg/L; CaCo
3=250MMOL/L.
Phosphorus-containing wastewater is added Vortex reactor, add Ca (OH) simultaneously
2Solution carries out chemical reaction, described Ca (OH)
2The mass ratio of solution and treating water is 6: 200; Again reacted wastewater is flowed into flocculation sedimentation tank, add AL simultaneously
2O
3Solution and PAM solution mix reaction, sedimentation and filtration, described AL through 30Min
2O
3The mass ratio of solution and treating water is 2: 1000, and the mass ratio of described PAM solution and treating water is 2: 2000; Waste water behind the sedimentation and filtration is entered molten gas tower by sand filter, waste water in molten gas tower through gas blower inflation, carry out combination reaction decompose change the phosphorus molecular structure after, flow into secondary sedimentation basins, add AL simultaneously
2O
3Solution, after chemical reaction is carried out secondary sedimentation and is filtered described AL
2O
3The mass ratio of solution and treating water is 2: 1000; The filtering waste water of secondary sedimentation is flowed into filtering basin filter, discharge through reuse pool.When treating water hardness is higher, treating water is entered water tank, use ion-exchanger to remove and handle water hardness, enter the effluent reuse water spot, the treating water that the effluent reuse water spot is discharged can carry out reuse.
Effluent quality is: PH=7.4; Total phosphorus=2.8mg/L, clearance 99.86%; COD=32mg/L, clearance 73.33%; CaCo
3=0.029MMOL/L, clearance 99.98%.Effluent quality meets the requirement of phosphorous chemical industry enterprise reuse technology water fully, the sewage sludge waste slag that produces behind the sedimentation and filtration in the Removal of Phosphorus in Wastewater process enters sludge thickener, be processed into the mud cake outward transport through the sludge press filtration machine, can be used for agricultural compound fertilizer after the mud cake drying.
Claims (7)
1, a kind of method of handling high-concentration phosphorus-containing wastewater is characterized in that, this method comprises:
(1) phosphorus-containing wastewater is added Vortex reactor, add Ca (OH) simultaneously
2Solution carries out chemical reaction;
(2) more reacted phosphorus-containing wastewater is entered flocculation sedimentation tank, add AL simultaneously
2O
3Solution and PAM solution mix reaction, sedimentation and filtration through 30-60Min;
(3) phosphorus-containing wastewater behind the sedimentation and filtration is entered molten gas tower by sand filter, waste water in molten gas tower through gas blower inflation, carry out combination reaction decompose change the phosphorus molecular structure after, flow into secondary sedimentation basins, add AL simultaneously
2O
3Solution, after chemical reaction is carried out secondary sedimentation and is filtered;
(4) the filtering waste water of secondary sedimentation is flowed into filtering basin and filter, discharge through reuse pool.
2, a kind of method of handling high-concentration phosphorus-containing wastewater according to claim 1 is characterized in that, when treating water hardness is higher, treating water is entered water tank, uses ion-exchanger to remove and handles water hardness, enters the effluent reuse water spot.
3, a kind of method of handling high-concentration phosphorus-containing wastewater according to claim 1 is characterized in that the sewage sludge waste slag that produces behind the sedimentation and filtration enters sludge thickener in the Removal of Phosphorus in Wastewater process, is processed into the mud cake outward transport through the sludge press filtration machine.
4, a kind of method of handling high-concentration phosphorus-containing wastewater according to claim 2 is characterized in that, described treating water of being discharged by the effluent reuse water spot can carry out reuse.
5, a kind of method of handling high-concentration phosphorus-containing wastewater according to claim 1 is characterized in that, the described Ca of step 1 (OH)
2The mass ratio of solution and phosphorus-containing wastewater is 6-8: 200.
6, a kind of method of handling high-concentration phosphorus-containing wastewater according to claim 1 is characterized in that, the described AL of step 2
2O
3The mass ratio of solution and phosphorus-containing wastewater is 1-4: 1000, and the mass ratio of PAM solution and phosphorus-containing wastewater is 1-2: 2000.
7, a kind of method of handling high-concentration phosphorus-containing wastewater according to claim 1 is characterized in that, the described AL of step 3
2O
3The mass ratio of solution and phosphorus-containing wastewater is 1-4: 1000.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100272217A CN101549921A (en) | 2009-05-25 | 2009-05-25 | Method for treating high-concentration phosphorus-contained wastewater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100272217A CN101549921A (en) | 2009-05-25 | 2009-05-25 | Method for treating high-concentration phosphorus-contained wastewater |
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| CN101549921A true CN101549921A (en) | 2009-10-07 |
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| CNA2009100272217A Pending CN101549921A (en) | 2009-05-25 | 2009-05-25 | Method for treating high-concentration phosphorus-contained wastewater |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102633384A (en) * | 2012-04-20 | 2012-08-15 | 瓮福（集团）有限责任公司 | Method for preparing phosphoric acid by recycling phosphorus from phosphorus-containing wastewater |
| CN102701489A (en) * | 2012-06-29 | 2012-10-03 | 上海大学 | Three-step process for high-concentration phosphorus-containing wastewater by calcium aluminum compound |
| CN102745863A (en) * | 2012-07-04 | 2012-10-24 | 哈尔滨工业大学 | High efficiency fluidization upward flow multilayer composite filter material biological filter tank coupled with ozonation and water treatment method thereof |
| CN103755061A (en) * | 2013-12-30 | 2014-04-30 | 广西利达磷化工有限公司 | Comprehensive utilization method of phosphoric acid and phosphate industrial wastewater |
| CN112174439A (en) * | 2020-10-14 | 2021-01-05 | 上海三邦水处理技术有限公司 | LED chip manufacturing industry wastewater treatment engineering process |
| CN113461202A (en) * | 2021-06-24 | 2021-10-01 | 宜都兴发化工有限公司 | Resource treatment method for high phosphorus, high calcium and high magnesium |
-
2009
- 2009-05-25 CN CNA2009100272217A patent/CN101549921A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102633384A (en) * | 2012-04-20 | 2012-08-15 | 瓮福（集团）有限责任公司 | Method for preparing phosphoric acid by recycling phosphorus from phosphorus-containing wastewater |
| CN102701489A (en) * | 2012-06-29 | 2012-10-03 | 上海大学 | Three-step process for high-concentration phosphorus-containing wastewater by calcium aluminum compound |
| CN102701489B (en) * | 2012-06-29 | 2013-10-16 | 上海大学 | Three-step process for high-concentration phosphorus-containing wastewater by calcium aluminum compound |
| CN102745863A (en) * | 2012-07-04 | 2012-10-24 | 哈尔滨工业大学 | High efficiency fluidization upward flow multilayer composite filter material biological filter tank coupled with ozonation and water treatment method thereof |
| CN103755061A (en) * | 2013-12-30 | 2014-04-30 | 广西利达磷化工有限公司 | Comprehensive utilization method of phosphoric acid and phosphate industrial wastewater |
| CN112174439A (en) * | 2020-10-14 | 2021-01-05 | 上海三邦水处理技术有限公司 | LED chip manufacturing industry wastewater treatment engineering process |
| CN113461202A (en) * | 2021-06-24 | 2021-10-01 | 宜都兴发化工有限公司 | Resource treatment method for high phosphorus, high calcium and high magnesium |
| CN113461202B (en) * | 2021-06-24 | 2023-10-27 | 宜都兴发化工有限公司 | High-phosphorus and high-calcium magnesium recycling treatment method |
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Open date: 20091007 |