CN105417860A - Method for processing high-concentration and high-phosphorus wastewater - Google Patents
Method for processing high-concentration and high-phosphorus wastewater Download PDFInfo
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- CN105417860A CN105417860A CN201510837332.XA CN201510837332A CN105417860A CN 105417860 A CN105417860 A CN 105417860A CN 201510837332 A CN201510837332 A CN 201510837332A CN 105417860 A CN105417860 A CN 105417860A
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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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
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- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a method for processing high-concentration and high-phosphorus wastewater. The method includes the first step of the microelectrolysis reaction, the second step of the Fenton reaction, the third step of the microbubble air flotation reaction, the fourth step of water quality regulation, the fifth step of the biochemical reaction and the sixth step of sludge filter pressing. Sludge subjected to the microbubble air flotation reaction in the third step is dehydrated through a filter press, generated first filter pressing filtrate is conveyed to first step to be subjected to the microelectrolysis reaction, and the reaction is conducted again; second filter pressing filtrate generated after sludge generated by the biochemical reaction in the fifth step is dehydrated through the filter press enters the microbubble air flotation reaction in the third step, and the reaction is conducted again. The method is good in phosphorus removal effect, low in processing expense and small in sludge amount.
Description
Technical field
The present invention relates to field of industrial waste water treatment, particularly relate to a kind of method processing high density high phosphorus waste water.
Background technology
Along with the fast development of China's growth in the living standard in recent years and industrial or agricultural, cause the material concentration such as nitrogen, phosphorus, potassium being disposed to water body progressively to increase, cause body eutrophication problem.Wherein, nitrogen excessive in water body, a phosphorus part is from process trade effluent not up to standard and sanitary sewage, and another part is from a point domestic refuse, livestock and poultry cultivation and the agriculture aspect such as to fertilize.In industrial wastewater discharge, electroplating industry is not only China's Heavy Metals in Waters primary discharge source, also be the primary discharge source of the nutritive element such as nitrogen, phosphorus, its major cause uses a large amount of inferior sodium phosphate etc. as chemical plating agent in electroplating technology, causes the phosphoric usually containing higher concentration in the electroplating wastewater discharged.
Current treatment of Phosphorus Containing Waste Water is utilize molysite, aluminium salt and lime to equal method dephosphorization that phosphate radical generates difficult calcium phosphate precipitation thing, has the advantages such as phosphor-removing effect is good, processing unit is simple, stable, but there is the deficiencies such as processing costs is high, sludge quantity is large.
Summary of the invention
Based on this, be necessary to provide the method for the process high density high phosphorus waste water that a kind of phosphor-removing effect is good, processing costs is low, sludge quantity is little.
Process a method for high density high phosphorus waste water, comprise the steps:
(1) micro-electrolysis reaction: high phosphorus waste water is delivered to the micro-electrolysis reaction tank containing iron-carbon micro-electrolysis filler, recruitment sulfuric acid and sodium hydroxide regulate pH to 3.0, and open aeration and react;
(2) Fenton reaction: after micro-electrolysis reaction, waste water is delivered to Fenton retort, adds H in waste water
2o
2after, composition Fenton reagent, carries out redox reaction;
(3) microvesicle air supporting reaction: reacted first water outlet of Fenton is delivered to microvesicle air supporting reactor, adds flocculation agent, removes suspended particulate;
(4) water quality regulation: the reacted second water outlet recruitment sulfuric acid of microvesicle air supporting and sodium hydroxide regulate pH to 9.0;
(5) biochemical reaction: after microvesicle air supporting reaction and the second water outlet through overregulating pH enters biochemical system carries out biological dephosphorize denitrification;
(6) sludge press filtration: the reacted mud of microvesicle air supporting in step (3) is dewatered by pressure filter, the first pressing filtering liquid of generation is delivered to step (1) micro-electrolysis reaction, re-starts reaction; The mud that the reaction of step (5) mesophytization produces is after pressure filter dehydration, and the second pressing filtering liquid of generation enters step (3) microvesicle air supporting reaction, re-starts reaction.
Wherein in an embodiment, described in step (1), the solid-to-liquid ratio of iron-carbon micro-electrolysis filler and high phosphorus waste water is 1:1.
Wherein in an embodiment, vapour-liquid ratio 15:1 during aeration described in step (1).
Wherein in an embodiment, the aerated reaction time is 60-70min.
Wherein in an embodiment, in step (2), in waste water after micro-electrolysis reaction, add H
2o
2ratio be: waste water after micro-electrolysis reaction: H
2o
2mass ratio 1:10.
Wherein in an embodiment, the redox reaction time described in step (2) is 60-90min.
Wherein in an embodiment, the flocculation agent described in step (3) comprises polymerize aluminum chloride consumption 35mg/L, polyacrylamide consumption 0.5mg/L.
Wherein in an embodiment, in step (4) after the reacted second water outlet recruitment sulfuric acid of microvesicle air supporting and sodium hydroxide regulate pH to 9.0, sedimentation 60min.
The method of the process high density high phosphorus waste water that the present invention relates to, process high density, difficult degradation, high phosphorus waste water, have following characteristics:
(1) significantly reduce dosing: one, the pH due to waste water is between 2.5 ~ 3.5, adopts iron-carbon micro-electrolysis reaction, does not need to add a large amount of acid for adjusting pH, significantly reduce the consumption of medicament; Its two, due to the Fe produced in micro-electrolysis reaction
2+ion can with H
2o
2composition Fenton reagent, does not need additionally to add the Fe such as ferrous sulfate
2+ion, reduces dosing further.
(2) treatment effect is good, process runs well.Pretreatment technology part in the method for the process high density high phosphorus waste water that the present invention relates to all adopts physical chemistry method process, and treatment effect is stablized, and is follow-up and MBR biochemical treatment provides guarantee, finally can effectively ensures that standard water discharge is discharged.
(3) effectively running cost is reduced.The method of the process high density high phosphorus waste water that the present invention relates to significantly can reduce the consumption of the medicaments such as acid, catalyzer, alkali, thus significantly reduces reagent cost, final effectively reduction ton cost of water treatment;
(4) phosphorus is recycled.The phosphoric acid salt produced after the method process of the process high density high phosphorus waste water that the present invention relates to can carry out effective recycling, realizes resource recycling on the one hand, and reduction phosphorus enters the eutrophication problem that natural water brings on the other hand;
(5) the method impact load of the process high density high phosphorus waste water that the present invention relates to and the tolerance of change of water quality strong.
Embodiment
Present embodiments provide a kind of method processing high density high phosphorus waste water.
Process a method for high density high phosphorus waste water, comprise the steps:
(1) micro-electrolysis reaction: high phosphorus waste water is delivered to the micro-electrolysis reaction tank containing iron-carbon micro-electrolysis filler, recruitment sulfuric acid and sodium hydroxide regulate pH to 3.0, and open aeration and react.The solid-to-liquid ratio of described iron-carbon micro-electrolysis filler and high phosphorus waste water is 1:1.Vapour-liquid ratio 15:1 during aeration described in step (1).The aerated reaction time is 60-70min.
(2) Fenton reaction: after micro-electrolysis reaction, waste water is delivered to Fenton retort, adds H in waste water
2o
2after, composition Fenton reagent, carries out redox reaction.H is added in waste water after micro-electrolysis reaction
2o
2ratio be: waste water after micro-electrolysis reaction: H
2o
2mass ratio 1:10.The redox reaction time described in step (2) is 60-90min.
(3) microvesicle air supporting reaction: reacted first water outlet of Fenton is delivered to microvesicle air supporting reactor, adds flocculation agent, removes suspended particulate; Flocculation agent auxiliary under, remove suspended particulate, significantly reduce the concentration of phosphorus.Flocculation agent described in step (3) comprises PAC consumption 35mg/L, PAM consumption 0.5mg/L.
(4) water quality regulation: the reacted second water outlet recruitment sulfuric acid of microvesicle air supporting and sodium hydroxide regulate pH to 9.0; Fe residual in further removal waste water
3+, effluent quality meets the requirement of subsequent biochemical except phosphorus reaction.After the reacted second water outlet recruitment sulfuric acid of microvesicle air supporting and sodium hydroxide regulate pH to 9.0, sedimentation 60min.
(5) biochemical reaction: after microvesicle air supporting reaction and the second water outlet through overregulating pH enters biochemical system carries out biological dephosphorize denitrification, qualified discharge after process.
(6) sludge press filtration: the reacted mud of microvesicle air supporting in step (3) is dewatered by pressure filter, the first pressing filtering liquid produced is delivered to step (1) micro-electrolysis reaction, re-start reaction, mud is the phosphoric acid salt of high density, recycles.The mud that the reaction of step (5) mesophytization produces is after pressure filter dehydration, and the second pressing filtering liquid of generation enters step (3) microvesicle air supporting reaction, re-starts reaction, and the mud cake outward transport of generation is disposed.
Adopt the method for the process high density high phosphorus waste water of the present embodiment, for the treatment of high-concentration hardly-degradable high phosphorus waste water, the processing parameter adopted:
With 1m
3the pilot experiment optimum handling efficacy parameter of the treatment capacity of/h is reference.
(1) micro-electrolysis reaction: the solid-to-liquid ratio 1:1 of filler and waste water, react pH3.0, aeration vapour-liquid ratio 15:1, reaction times 60min;
(2) Fenton reaction: add in 1:10 ratio, reaction times 60min;
(3) microvesicle air supporting reaction: 1m
3/ h, PAC (polymerize aluminum chloride) consumption 35mg/L, PAM (polyacrylamide) consumption 0.5mg/L;
(4) pH regulator: regulate pH9.0 with NaOH, sedimentation 60min.
Treatment effect:
Waste water raw water quality and process after water quality as shown in table 1.
| Index | CODcr(mg/l) | B/C | TP(mg/l) | pH |
| Former water | 50000 | <0.05 | 105 | 2.5～3.5 |
| Pre-treatment water outlet | 6000 | >0.25 | 5.2 | 8.5 |
| Clearance | 88％ | / | 95％ | / |
Known by upper table, the method for the process high density high phosphorus waste water in the present embodiment, the effect of process high phosphorus waste water is good.
The method of the process high density high phosphorus waste water that the present invention relates to, process high density, difficult degradation, high phosphorus waste water, have following characteristics:
(1) significantly reduce dosing: one, the pH due to waste water is between 2.5 ~ 3.5, adopts iron-carbon micro-electrolysis reaction, does not need to add a large amount of acid for adjusting pH, significantly reduce the consumption of medicament; Its two, due to the Fe produced in micro-electrolysis reaction
2+ion can with H
2o
2composition Fenton reagent, does not need additionally to add the Fe such as ferrous sulfate
2+ion, reduces dosing further.
(2) treatment effect is good, process runs well.Pretreatment technology part in the method for the process high density high phosphorus waste water that the present invention relates to all adopts physical chemistry method process, and treatment effect is stablized, and is follow-up and MBR biochemical treatment provides guarantee, finally can effectively ensures that standard water discharge is discharged.
(3) effectively running cost is reduced.The method of the process high density high phosphorus waste water that the present invention relates to significantly can reduce the consumption of the medicaments such as acid, catalyzer, alkali, thus significantly reduces reagent cost, final effectively reduction ton cost of water treatment;
(4) phosphorus is recycled.The phosphoric acid salt produced after the method process of the process high density high phosphorus waste water that the present invention relates to can carry out effective recycling, realizes resource recycling on the one hand, and reduction phosphorus enters the eutrophication problem that natural water brings on the other hand;
(5) the method impact load of the process high density high phosphorus waste water that the present invention relates to and the tolerance of change of water quality strong.
The method of the process high density high phosphorus waste water in the present patent application is applicable to the process of the waste water such as high concentration hard-degraded organic waste water, high phosphorus waste water, percolate and concentrated solution thereof.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. process a method for high density high phosphorus waste water, it is characterized in that, comprise the steps:
(1) micro-electrolysis reaction: high phosphorus waste water is delivered in the micro-electrolysis reaction tank containing iron-carbon micro-electrolysis filler, regulates pH to 3.0 with industrial sulphuric acid and sodium hydroxide, and opens aeration and react;
(2) Fenton reaction: after micro-electrolysis reaction, waste water is delivered to Fenton retort, adds H in waste water
2o
2after, composition Fenton reagent, carries out redox reaction;
(3) microvesicle air supporting reaction: reacted first water outlet of Fenton is delivered to microvesicle air supporting reactor, adds flocculation agent, removes suspended particulate;
(4) water quality regulation: the reacted second water outlet industrial sulphuric acid of microvesicle air supporting and sodium hydroxide regulate pH to 9.0;
(5) biochemical reaction: after microvesicle air supporting reaction and the second water outlet through overregulating pH enters biochemical system carries out biological dephosphorize denitrification;
(6) sludge press filtration: the reacted mud of microvesicle air supporting in step (3) is dewatered by pressure filter, the first pressing filtering liquid of generation is delivered to step (1) micro-electrolysis reaction, re-starts reaction; The mud that the reaction of step (5) mesophytization produces is after pressure filter dehydration, and the second pressing filtering liquid of generation enters step (3) microvesicle air supporting reaction, re-starts reaction.
2. the method for process high density high phosphorus waste water according to claim 1, it is characterized in that, described in step (1), the solid-to-liquid ratio of iron-carbon micro-electrolysis filler and high phosphorus waste water is 1:1.
3. the method for process high density high phosphorus waste water according to claim 1 and 2, is characterized in that, vapour-liquid ratio 15:1 during aeration described in step (1).
4. the method for process high density high phosphorus waste water according to claim 1 and 2, it is characterized in that, the aerated reaction time is 60-70min.
5. the method for process high density high phosphorus waste water according to claim 1 and 2, is characterized in that, adds H in step (2) in waste water after micro-electrolysis reaction
2o
2ratio be: waste water after micro-electrolysis reaction: H
2o
2mass ratio 1:10.
6. the method for process high density high phosphorus waste water according to claim 1 and 2, it is characterized in that, the redox reaction time described in step (2) is 60-90min.
7. the method for process high density high phosphorus waste water according to claim 1 and 2, is characterized in that, the flocculation agent described in step (3) comprises polymerize aluminum chloride consumption 35mg/L, polyacrylamide consumption 0.5mg/L.
8. the method for process high density high phosphorus waste water according to claim 1 and 2, is characterized in that, in step (4) after the reacted second water outlet recruitment sulfuric acid of microvesicle air supporting and sodium hydroxide regulate pH to 9.0, and sedimentation 60min.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106277628A (en) * | 2016-08-31 | 2017-01-04 | 南通联膦化工有限公司 | A kind of collaborative process high chemical oxygen demand, high ammonia nitrogen, the device of high phosphorus waste water |
| CN107032522A (en) * | 2017-04-28 | 2017-08-11 | 四川和鼎环保工程有限责任公司 | A kind of method for removing phosphor in sewage |
| CN107698059A (en) * | 2017-10-31 | 2018-02-16 | 惠州市宙邦化工有限公司 | A kind of phosphorus-containing wastewater contamination precipitation processing method |
| CN109020054A (en) * | 2018-07-12 | 2018-12-18 | 菏泽学院 | A kind of processing method of phosphorus-containing wastewater |
| CN109626639A (en) * | 2018-12-24 | 2019-04-16 | 湖北兴发环保科技有限公司 | A kind of processing method of high concentration organism P wastewater |
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Application publication date: 20160323 |