CN105731691A - Coupled stabilizing treatment method for acid wastewater and incineration ash - Google Patents
Coupled stabilizing treatment method for acid wastewater and incineration ash Download PDFInfo
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- CN105731691A CN105731691A CN201610194422.6A CN201610194422A CN105731691A CN 105731691 A CN105731691 A CN 105731691A CN 201610194422 A CN201610194422 A CN 201610194422A CN 105731691 A CN105731691 A CN 105731691A
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- waste water
- burning ash
- acid waste
- treatment method
- stabilization treatment
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- 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
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
-
- 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
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/20—Waste processing or separation
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a coupled stabilizing treatment method for acid wastewater and incineration ash. The method comprises the following steps: (1) adding incineration ash into acid wastewater in the stirring process at normal temperature and under normal pressure, regulating the pH value to be 6-8, adding a stabilizing agent, stirring, mixing, standing and precipitating, wherein the acid wastewater is pickling wastewater in iron and steel industry or pickling wastewater in electroplating industry; and (2) performing solid-liquid separation on the mixed solution subjected to standing and precipitating in the step (1), thereby obtaining waste liquid and sludge, wherein the obtained filtrate is subjected to heavy metal content measurement to realize up-to-standard release or returns to the step (1) for recycling, and the obtained sludge is subjected to secure landfill or recycled. According to the method disclosed by the invention, acid wastewater in the industry is subjected to neutralization pretreatment by utilizing weak basicity of the incineration ash, the pH value is regulated to be nearly neutral, deep treatment is performed by adding heavy metal stabilizing agents, a process of performing stabilizing treatment on the acid wastewater and incineration ash is realized, and the treatment method is simple and good in effect.
Description
Technical field
The present invention relates to Environmental Chemistry field, be specifically related to a kind of acid waste water and couple stabilisation method of disposal altogether with flying ash.
Background technology
Consumer waste incineration can effective decrement combustible, but for heavy metal substance contained therein, generally after it burns, major part heavy metal can be enriched with and is distributed in flying ash.Document shows, contains the multiple harmful heavy metal material such as Cd, Pb, Zn of the higher concentration that can be flooded out and a small amount of organic pollution in flying dust.
Process currently mainly disposes means for solidifying landfill and cement plant recycling.Solidifying landfill is the conventional treatment means of current flying ash, and the fly-ash heavy metal after solidification leaches and reaches standard of landfill, but after flyash curing, increase-volume is relatively big, landfill yard capacity and flying dust quickly increase between contradiction day by day show especially.Flying dust and cement slurry component are close, but heavy metal in flying dust and chlorine element can cause ring formation and the blocking of cement kiln.Therefore, before recycling, it is necessary to flying dust is carried out pretreatment, current Beijing found a capital work, Shanghai City is thrown, fly ash cement kiln synergic processing is had correlational study, but rarely has reported success by the south enterprise such as cement.
Such as, publication number is the processing method that the Chinese invention patent application document of CN103170488A discloses a kind of incineration of refuse flyash firming agent and incineration of refuse flyash, and incineration of refuse flyash firming agent includes light-magnesite powder；The processing method of incineration of refuse flyash includes: is mixed with incineration of refuse flyash firming agent and water by pending incineration of refuse flyash, obtains liquid-solid mixture, then solidified by liquid-solid mixture, obtains firming body.
Industry acid waste water is in production process, and iron and steel or metal surface adopt the industrial wastewater that strong acid produces after carrying out surface treatment.Such waste water is mainly containing a large amount of metal ions, heavy metal ion, and pH changes greatly simultaneously, mostly is slant acidity, is directly discharged into water body and can cause severe contamination, and aquatic animals and plants is dead.Generally adopting the way adding alkali neutralization to process, the mud after process contains substantial amounts of heavy metal, belongs to hazardous waste.
Such as, publication number is the process technique that the Chinese invention patent application of CN105314764A discloses a kind of copper-containing acid waste water, vulcanization reaction tank is flowed into after being mixed in blended for copper-containing acid waste water pond, industrial sodium sulfide and flyash it is simultaneously introduced in tank, stirring 30-40min, after vulcanization reaction, flows into inclined-plate clarifying basin precipitation 50-60min by water outlet, the configured degasser in sedimentation tank of water outlet after precipitation, stripping H2S gas, then with the supernatant in concentration basin, filter after filtrate pool together reuse or arrange outward.The bed mud of sedimentation tank enters concentration basin, the filtering residue reuse after concentration.
But existing processing method all exists, and treatment process is various, processing cost is high or processes the problems such as not thorough.
Summary of the invention
The invention provides a kind of acid waste water and couple stabilization treatment method with burning ash, utilize the alkalescence of burning ash, industry acid waste water is neutralized pretreatment.By pH regulator weakly acidic pH, and carry out advanced treating by adding heavy metal stable pharmaceutical, it is achieved the technique to acid waste water and burning ash stabilizing treatment, processing method is simple, effective.
A kind of acid waste water couples stabilization treatment method with burning ash, comprises the steps:
(1) under normal temperature and pressure, adding burning ash and regulate pH to 6～8, be subsequently adding stable pharmaceutical in whipping process in oxytropism waste water, standing sedimentation after stirring mixing, described acid waste water is steel industry pickling waste waters or electroplating industry pickling waste waters；
(2) mixed liquor after step (1) standing sedimentation is carried out solid-liquid separation, obtain waste liquid and mud, gained filtrate carries out qualified discharge after content of beary metal measures or returns circular treatment in step (1), and gained mud carries out security landfill or recycling.
The present invention utilizes the alkali condition of burning ash that industry acid waste water is neutralized pretreatment.By the pH regulator weakly acidic pH of acid waste water and burning ash, and add heavy metal stabilization medicament, by chemical reaction, generate stable heavy metallic mineral matter salt, it is achieved the stabilisation to acid waste water and heavy metal in incineration ash.This technique reduces industry acid waste water and the cost of burning ash individual processing, and realize refuse innoxious while, reach refuse and reduce perhaps not increase-volume, thus improving hazardous waste to process the overall efficiency and economy disposed.
Preferably, in described acid waste water, contained heavy metal element is at least one in Zn, Cd, Mn and Pb.Further, the pollutant index in described acid waste water is as follows:
Most preferably, the pollutant index in described acid waste water is as follows:
Burning ash is white or slightly yellow fine powder, it is preferable that described burning ash is the burning ash that domestic waste incineration produces, and heavy metal element is at least one in Zn, Cd, Cr and Pb.It is further preferred that the basis of described burning ash (%) is as follows:
Most preferably, the basis (%) of described burning ash is as follows:
Preferably, described stable pharmaceutical is sodium dihydrogen phosphate and/or potassium dihydrogen phosphate.
Preferably, in step (1), mixing speed is 50～150 turns/min, it is most preferred that be 100 turns/min.
Preferably, in step (1), the standing sedimentation time is 15-20min, it is most preferred that for 20min.
Preferably, in step (1) volume mass of acid waste water, burning ash and stable pharmaceutical than for 1L:(15～25) g:(1～2) g.
It is further preferred that the volume mass of acid waste water, burning ash and stable pharmaceutical is than for 1L:20g:1.5g in step (1).
Compared with prior art, there is advantages that
The present invention utilizes the alkalescence of incineration of refuse flyash, and industry acid waste water is neutralized pretreatment.By pH regulator weakly acidic pH, and by advanced treating, solve innoxious, the stabilizing treatment problem of industry acid waste water and two kinds of hazardous wastes of incineration of refuse flyash simultaneously.
Accompanying drawing explanation
Fig. 1 is that acid waste water of the present invention puts technical matters route map with burning ash coexistence.
Fig. 2 is flying dust addition of the present invention and pH value of waste water variation diagram.
Detailed description of the invention
Embodiment 1
1, industry acid waste water index determining
Zhejiang enterprise acid waste water is light brown transparency liquid, acid, and containing a large amount of metals, mainly has Pb, Zn, Cd, Mn, Fe etc..As shown in Table 1, in acid water pollution thing index Pb, Zn, Cd tri-heavy metal species exceed standard, pH value is 2.33.
Table 1 Zhejiang enterprise acid water pollution thing index
2, burning ash index determining
The basis (%) of table 2 flying dust
Burning ash is white or slightly yellow fine powder.Burning ash used by the present invention takes from Hangzhou garbage burning factory, and basis is as shown in table 2.Its essential element is based on Ca, Cl, K, S and Si, and the compound such as volatile element such as Cl, Pb, Cd, Zn and monomer enriched substance content are high, heavy metal based on Pb, Zn, etc..
3, scale parameter design is added
The initial pH of acid waste water is 2.33, and by adding incinerator ash, pH constantly rises, and is rise slowly near 3-4 at pH, until dosage continues to raise more than more than 15g, pH, it is 10.4 that dosage reaches pH during 24g, progressively tends to be steady afterwards, and final pH is about 11.Wherein, pH is not linearly increasing along with the increase of dosage near 3-4, is because in waste water Fe3+When being precipitated as Fe (OH) 3, consume OH in a large number-, thus within the specific limits, keep the pH value in waste water without large change.As seen from the figure, when pH is close to 7, the dosage of flying dust is about 20g, it is thus determined that the mass ratio of acid waste water and flying ash is 50:1.
4, stable pharmaceutical dosage
According to the heavy metal mol ratio in phosphate anion and two kinds of pollutant it can be seen that 1L waste water and 20g fly ash mixture, it is necessary to adding stable pharmaceutical theoretical value is 2.5g.When additive amount of medicament is 1.0g, heavy metal Pb and Cd concentration are reduced to 0.58mg/L and 0.096mg/L, meet discharge standard；When additive amount of medicament is 1.5g, heavy metal Zn concentration is 3.86mg/L, meets the discharge standard of 5mg/L.After heavy metal stable pharmaceutical addition reaches 1.5g, all kinds of heavy metals basically reach below discharge standard concentration.
Accordingly, it is determined that laboratory process parameter is acid wastewater in mine: flying ash: stable pharmaceutical=1L:20g:1.5g.
Embodiment 2
1, acid waste water coupling processing result
Acid waste water heavy metal concentration (mg/L) after table 3 process
Note: wastewater discharge standard is " integrated wastewater discharge standard " (GB8978-1996).
Acid waste water is after incinerator ash coupling processing, and pH regulator is to neutral, and after adding heavy metal chelating stable pharmaceutical, its heavy metal concentration is measured.Wherein, the metal concentration such as Cu, Pb, Zn, Cd, Mn, Fe, As all has the decline of certain amplitude, clearance respectively 58.5%, 88.1%, 93.7%, 76.1%, 49.8%, 63.1%, 100%.All kinds of heavy metal relatives define more stable heavy phosphates class before processing, and are solid phase precipitation from liquid phase, and after measured, each heavy metal species is satisfied by waste water comprehensive discharge standard.
2, burning ash coupling processing result
Table 4 flying dust processes the TCLP data of front and back
Incinerator ash is after acid waste water coupling processing, and Leaching of Heavy Metals concentration all has reduction in various degree.Wherein, the stabilizing treatment effect of Cr is general, and leaching concentration reduces 28%, and Pb, Zn and Cd reduce 92.1%, 73.4% and 95.2% respectively.
Incinerator ash after process can meet " hazardous waste judging standard-leaching characteristic identification " (GB5085.3-2007) requirement, can as the pretreatment product of recycling or security landfill.
Claims (8)
1. an acid waste water couples stabilization treatment method with burning ash, it is characterised in that comprise the steps:
(1) under normal temperature and pressure, adding burning ash and regulate the pH to 6～8 of waste water, be subsequently adding stable pharmaceutical in whipping process in oxytropism waste water, standing sedimentation after stirring mixing, described acid waste water is steel industry pickling waste waters or electroplating industry pickling waste waters；
(2) mixed liquor after step (1) standing sedimentation is carried out solid-liquid separation, obtain waste liquid and mud, gained filtrate carries out qualified discharge after content of beary metal measures or returns circular treatment in step (1), and gained mud carries out security landfill or recycling.
2. acid waste water couples stabilization treatment method with burning ash according to claim 1, it is characterised in that in described acid waste water, contained heavy metal element is at least one in Zn, Cd, Mn and Pb.
3. acid waste water couples stabilization treatment method with burning ash according to claim 1, it is characterised in that described burning ash is the burning ash that domestic waste incineration produces, and heavy metal element is at least one in Zn, Cd, Cr and Pb.
4. acid waste water couples stabilization treatment method with burning ash according to claim 1, it is characterised in that described stable pharmaceutical is sodium dihydrogen phosphate and/or potassium dihydrogen phosphate.
5. acid waste water couples stabilization treatment method with burning ash according to claim 1, it is characterised in that in step (1), mixing speed is 50～150 turns/min.
6. acid waste water couples stabilization treatment method with burning ash according to claim 1, it is characterised in that in step (1), the standing sedimentation time is 15-25min.
7. acid waste water couples stabilization treatment method with burning ash according to claim 1, it is characterized in that, in step (1), the volume mass of acid waste water, burning ash and stable pharmaceutical is than for 1L:(15～25) g:(1～2) g.
8. acid waste water couples stabilization treatment method with burning ash according to claim 1, it is characterised in that in step (1), the volume mass of acid waste water, burning ash and stable pharmaceutical is than for 1L:20g:1.5g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610194422.6A CN105731691A (en) | 2016-03-30 | 2016-03-30 | Coupled stabilizing treatment method for acid wastewater and incineration ash |
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| CN201610194422.6A CN105731691A (en) | 2016-03-30 | 2016-03-30 | Coupled stabilizing treatment method for acid wastewater and incineration ash |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108706802A (en) * | 2018-04-25 | 2018-10-26 | 中广核研究院有限公司 | The processing method and its processing system for the pollutant that consumer waste incineration generates |
| CN109850978A (en) * | 2019-01-23 | 2019-06-07 | 昆明理工大学 | A kind of heavy nonferrous smelting sewage and sludge integral treatment method |
| CN110672538A (en) * | 2019-11-13 | 2020-01-10 | 辽宁石油化工大学 | Method for reducing content of heavy metal ion lead in incineration fly ash by using phosphate solution |
| CN114610086A (en) * | 2022-04-08 | 2022-06-10 | 深圳能源环保股份有限公司 | PH value-based waste incineration fly ash treatment method and device and storage medium |
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| US5645730A (en) * | 1995-02-21 | 1997-07-08 | Envirocorp Services & Technology, Inc. | Acid wastewater treatement |
| AU2004100541A4 (en) * | 2004-07-07 | 2004-08-05 | Ecosus Pty Ltd | Method For Treating and Soluble Heavy Metal Concentrates at Source |
| CN105110506A (en) * | 2015-08-28 | 2015-12-02 | 浙江省环境保护科学设计研究院 | Acid mine drainage/refuse incineration fly ash coupled stabilization treatment method |
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2016
- 2016-03-30 CN CN201610194422.6A patent/CN105731691A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5645730A (en) * | 1995-02-21 | 1997-07-08 | Envirocorp Services & Technology, Inc. | Acid wastewater treatement |
| AU2004100541A4 (en) * | 2004-07-07 | 2004-08-05 | Ecosus Pty Ltd | Method For Treating and Soluble Heavy Metal Concentrates at Source |
| CN105110506A (en) * | 2015-08-28 | 2015-12-02 | 浙江省环境保护科学设计研究院 | Acid mine drainage/refuse incineration fly ash coupled stabilization treatment method |
| CN105198129A (en) * | 2015-11-09 | 2015-12-30 | 浙江工业大学 | Synergic treatment method of heavy metals in hazardous waste incineration plant wastewater and fly ash |
Non-Patent Citations (1)
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| 郭燕妮等: "化学沉淀法处理含重金属废水的研究进展", 《工业水处理》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108706802A (en) * | 2018-04-25 | 2018-10-26 | 中广核研究院有限公司 | The processing method and its processing system for the pollutant that consumer waste incineration generates |
| CN109850978A (en) * | 2019-01-23 | 2019-06-07 | 昆明理工大学 | A kind of heavy nonferrous smelting sewage and sludge integral treatment method |
| CN109850978B (en) * | 2019-01-23 | 2022-05-27 | 昆明理工大学 | Integrated treatment method for heavy color smelting sewage and sludge |
| CN110672538A (en) * | 2019-11-13 | 2020-01-10 | 辽宁石油化工大学 | Method for reducing content of heavy metal ion lead in incineration fly ash by using phosphate solution |
| CN114610086A (en) * | 2022-04-08 | 2022-06-10 | 深圳能源环保股份有限公司 | PH value-based waste incineration fly ash treatment method and device and storage medium |
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