CN106219806A - A kind of processing method of heavy metal wastewater thereby - Google Patents
A kind of processing method of heavy metal wastewater thereby Download PDFInfo
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- CN106219806A CN106219806A CN201610683806.4A CN201610683806A CN106219806A CN 106219806 A CN106219806 A CN 106219806A CN 201610683806 A CN201610683806 A CN 201610683806A CN 106219806 A CN106219806 A CN 106219806A
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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- 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
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- 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
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- 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
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- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/203—Iron or iron compound
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Abstract
The invention provides the processing method of a kind of heavy metal wastewater thereby, including: A) heavy metal wastewater thereby is filtered；B) waste water after filtering mixes with inorganic flocculating agent, and then regulation pH value is 8～12, adds organic flocculant, is filtered to remove precipitation, obtains supernatant；C) by step B) supernatant that obtains regulation pH value is 9～13, reacts with potassium permanganate, calcium hypochlorite successively；D) by step C) reacted waste water mixes with inorganic flocculating agent, and then regulation pH value is 6～9, adds organic flocculant, is filtered to remove precipitation, obtains supernatant；E) by step D) supernatant that obtains carries out sand filtration, carbon filter, for the first time resin absorption, for the second time resin absorption, water after being processed successively.The waste water treatment process that the present invention provides, can make each heavy metal concentration be down to " water environment quality standard " (GB3838 2002) three class water quality standard.
Description
Technical field
The present invention relates to industrial waste water treatment, particularly relate to the processing method of a kind of heavy metal wastewater thereby.
Background technology
Heavy metal-containing waste water refers to that discharges in the industrial processes such as mining and metallurgy, machine-building, chemical industry, electronics, instrument contains
The waste water of heavy metal ion.Heavy metal (as containing As, Tl, Pb, Cd, Ni, Hg etc.) waste water is that environmental pollution is the most serious and to people
The industrial wastewater that class harm is maximum.Owing in heavy metal-containing waste water, metal is dissolved in waste water with ionic condition, can not pass through
The modes such as simple precipitation, filtration are removed, and can not be decomposed by natural environment and destroy, give up if the most arbitrarily will contain heavy metal
Water is discharged in natural environment and the health of natural environment and the mankind will be caused huge threat.
At present, the processing method of heavy metal wastewater thereby mainly includes absorption method, bioanalysis and chemical method.Absorption method can be divided into one
As absorption and ion exchange, be primarily adapted for use in process low-concentration heavy metal ions sewage, for the heavy metal wastewater thereby of high concentration
Treatment effect is poor, needs frequently to resolve and regeneration, is generally used for pretreated advanced treatment process；Bioanalysis mainly profit
With the microorganism adsorption/absorption effect to certain heavy metal species, reach the effect purified water, but microorganism adapts to requirement to environment
Harsh, and in the presence of contents of many kinds of heavy metal ion, effect toxic to microorganism, thus result in treatment effect poor stability, up to standard
Difficulty；Chemical method is the earliest for the technical method of heavy metal containing wastewater treatment, mainly utilizes chemical oxidation/reduction, coagulating sedimentation
Etc. process, making heavy metal ion form hydroxide precipitation and remove, have process wastewater flow rate big, process range is wide, equipment letter
Single, easy to operate, technique is more ripe, is suitable for processing the advantages such as high-concentration waste water, but still have the disadvantage that 1, traditional oxygen
Change, precipitation process of coagulation preferable to the treatment effect of major part heavy metal ion, but to Tl+、As3+Etc. being formed at lower valency
The metal ion of settlement, and some complex state heavy metals, its degradation effect is poor；2, excessive oxidant addition is easily caused
Chemical agent waste and secondary pollution；3, the adding of a large amount of flocculant so that chemical sludge amount is relatively big, and processing cost is high；4, right
Reach the area of surface water standard in emission request, use chemical treatment method to be difficult to directly reach discharge standard.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is to provide the processing method of a kind of heavy metal wastewater thereby, runs
Stable, and there is higher treatment effeciency.
The invention provides the processing method of a kind of heavy metal wastewater thereby, including:
A) heavy metal wastewater thereby is filtered；
B) waste water after filtering mixes with inorganic flocculating agent, and then regulation pH value is 8～12, adds organic flocculant,
It is filtered to remove precipitation, obtains supernatant；
C) by step B) supernatant that obtains regulation pH value is 9～13, carries out instead with potassium permanganate, calcium hypochlorite successively
Should；
D) by step C) reacted waste water mixes with inorganic flocculating agent, and then regulation pH value is 6～9, adds organic wadding
Solidifying agent, is filtered to remove precipitation, obtains supernatant；
E) by step D) supernatant that obtains carries out sand filtration successively, carbon filter, for the first time resin absorption, for the second time resin are inhaled
Attached, water after being processed.
Preferably, described heavy metal wastewater thereby includes Ni2+, As3+, Cd2+, Tl+, Cr3+, Pb2+, Co2+, Zn2+, Cu2+, Fe2+,
Fe3+, float and particulate matter.
Preferably, described filtration specially first pass through filter press filter, then pass sequentially through 20～30 μm, 5～
10 μm bag filters filter.
Preferably, described inorganic flocculating agent is aluminium flocculating agent, calcium flocculant or ferric flocculant.
Preferably, described organic flocculant is macromolecule organic flocculating agent.
Preferably, described organic flocculant is polyacrylamide.
Preferably, described step B) regulation pH value is 8～12, described step D) regulation pH value is 6～9.
Preferably, the consumption of described potassium permanganate is 0.1～1g/L, and the consumption of described calcium hypochlorite is 0.1～1g/L.
Preferably, the rate of adsorption of described first time resin absorption is 15～25m3/ hr, described second time resin absorption
The rate of adsorption is 15～25m3/hr。
Compared with prior art, the invention provides the processing method of a kind of heavy metal wastewater thereby, including: A) heavy metal is given up
Water filters；B) waste water after filtering mixes with inorganic flocculating agent, and then regulation pH value is 8～12, adds organic-flocculation
Agent, is filtered to remove precipitation, obtains supernatant；C) by step B) supernatant that obtains regulation pH value is 9～13, successively with permanganic acid
Potassium, calcium hypochlorite react；D) by step C) reacted waste water mixes with inorganic flocculating agent, then regulation pH value be 6～
9, add organic flocculant, be filtered to remove precipitation, obtain supernatant；E) by step D) supernatant that obtains carry out successively sand filtration,
Carbon filter, for the first time resin absorption, for the second time resin absorption, water after being processed.The waste water treatment process that the present invention provides, can make
The concentration of each heavy metal is down to " water environment quality standard " (GB3838-2002) three class water quality standard, and has water quality necessarily
Adaptability；This process costs is cheap simultaneously, and chemicals usage is few, non-secondary pollution, produces without gas odorous, to difference weight
Metal all has good removal effect, be particularly suited for large-scale, the complicated heavy metal wastewater thereby such as industry park, plant area pretreatment and
Advanced treating, waste water after treatment can qualified discharge or direct reuse.
Accompanying drawing explanation
Fig. 1 is the process chart of process for treating heavy-metal waste water of the present invention.
Detailed description of the invention
The invention provides the processing method of a kind of heavy metal wastewater thereby, including:
A) heavy metal wastewater thereby is filtered；
B) waste water after filtering mixes with inorganic flocculating agent, and then regulation pH value is 8～12, adds organic flocculant,
It is filtered to remove precipitation, obtains supernatant；
C) by step B) supernatant that obtains regulation pH value is 9～13, carries out instead with potassium permanganate, calcium hypochlorite successively
Should；
D) by step C) reacted waste water mixes with inorganic flocculating agent, and then regulation pH value is 6～9, adds organic wadding
Solidifying agent, is filtered to remove precipitation, obtains supernatant；
E) by step D) supernatant that obtains carries out sand filtration successively, carbon filter, for the first time resin absorption, for the second time resin are inhaled
Attached, water after being processed.
The waste water treatment process that the present invention provides, can make the concentration of each heavy metal be down to " water environment quality standard "
(GB3838-2002) three class water quality standard, and water quality is had certain adaptability；This process costs is cheap simultaneously, and chemicals usage is few,
Non-secondary pollution, produces without gas odorous, different heavy metals is all had good removal effect, is particularly suited for industry
The pretreatment and advanced treatment of the heavy metal wastewater thereby that garden, plant area etc. are large-scale, complicated, waste water after treatment can qualified discharge or straight
Take back use.
Heavy metal wastewater thereby of the present invention preferably includes Ni2+、As3+、Cd2+、Tl+、Cr3+、Pb2+、Co2+、Zn2+、Cu2+、
Fe2+、Fe3+Deng metal ion, possibly together with a small amount of float and particulate matter.
The process chart of the process for treating heavy-metal waste water that the present invention provides refers to Fig. 1.
First described heavy metal wastewater thereby is filtered by the present invention, removes the float in waste water and particulate matter, prevents
In subsequent processes, occur that particulate matter returns the molten and phenomenon of blocking pipeline, after filtering, obtain filtering water outlet.Filtering residue is through receiving
After collection, the filtering residue produced with other steps is jointly processed by.
The precision of described filtration is preferably 0.5～30 μm, more preferably 5～10 μm, or 20～30 μm.The present invention is to described
The method filtered there is no particular determination, the filter type that can be well known to those skilled in the art, and the present invention is preferably by filtering
Device filters, and described filter is preferably bag filter, box filter or pressure filter.Specifically real in some of the present invention
Execute in example, first pass through filter press filter, then pass sequentially through 20～30 μm, 5～10 μm bag filter filter.
Then the waste water after described filtration is entered waste water reaction still, carry out a coagulating sedimentation.
First the waste water after filtering mixes with inorganic flocculating agent, enters flocculation sediment stage, then regulation system pH value,
Make the heavy metal ion in waste water form infusible precipitate or absorption and form adsorption precipitation on the surface of inorganic flocculating agent.
Described inorganic flocculating agent is preferably aluminium flocculating agent, calcium flocculant or ferric flocculant.More preferably aluminum chloride, sulphuric acid
Any one or more in aluminum, calcium oxide, calcium chloride, iron chloride and iron sulfate, more preferably iron chloride and/or iron sulfate.
The time of described addition inorganic flocculating agent reaction is preferably 15～30min, more preferably 20～25min.Described instead
The temperature answered can be room temperature.Reaction is preferably stirred in described reaction.
Described inorganic flocculating agent adds the most in form of an aqueous solutions, and the mass content of described inorganic flocculating agent aqueous solution is excellent
Electing 30%～60% as, in some embodiments of the invention, the mass content of described inorganic flocculating agent aqueous solution is
50%.The addition of described inorganic flocculating agent is 1～10mL/L, more preferably 4～8mL/L.
Then regulation system pH value, preferably regulation pH value is 8～12, and more preferably 8～9 are concrete in some of the present invention
In embodiment, described pH value is 9.Currently preferred, use alkali compounds regulation pH value, described alkali compounds can be
Alkali compounds well known in the art, preferably solid or liquid sodium hydroxide.
After regulation pH value, add organic flocculant, promote the flco in waste water and particulate matter to be deposited at the bottom of solution further
Portion, removes part metals ion again.
Described organic flocculant is preferably macromolecule organic flocculating agent, more preferably polyacrylamide.
Described organic flocculant adds the most in form of an aqueous solutions, and the mass content of described organic flocculant aqueous solution is excellent
Elect 0.01%～0.1% as, more preferably 0.02%～0.06%；In some embodiments of the invention, described organic
The mass content of flocculant aqueous solution is 0.1%.The addition of described organic flocculant is preferably 1～10mL/L, more preferably 1
～5mL/L.
After adding organic flocculant, preferred system stirring 1～10min, more preferably stirring 1～5min, then stands
Precipitation, described in time of staticly settling be preferably 30～80min, more preferably 50～70min.
After standing, the supernatant enters depositing reservoir, continues subsequent processing steps, and precipitation carries out filter pressing separation.
Being 9～13 by supernatant obtained above regulation pH value, more preferably regulation pH value is 10～12, successively with permanganic acid
Potassium, calcium hypochlorite carry out Strong oxdiative reaction, and the complex state metal ion in waste water, at a low price soluble metal ion are carried out contact break
And oxidation.
The consumption of above-mentioned potassium permanganate is preferably 0.1～1g/L, more preferably 0.2～0.5g/L.The time of described reaction
It is preferably 1～4h, more preferably 2～3h.
The consumption of above-mentioned calcium hypochlorite is preferably 0.1～1g/L, more preferably 0.2～0.5g/L.The time of described reaction
It is preferably 1～4h, more preferably 2～3h.
Then the waste water after oxidation reaction is entered waste water reaction still, carry out second coagulation precipitation.
Concrete, waste water is mixed with inorganic flocculating agent, reacts, then regulating pH value is 6～9, more preferably 7～
8, in some embodiments of the invention, described pH value is 7, is subsequently adding organic flocculant, carries out coagulating sedimentation, filters
Remove remaining heavy metal ion, obtain supernatant.
First the waste water after filtering mixes with inorganic flocculating agent, enters flocculation sediment stage, then regulation system pH value.
Described inorganic flocculating agent is preferably aluminium flocculating agent, calcium flocculant or ferric flocculant.More preferably aluminum chloride, sulphuric acid
Any one or more in aluminum, calcium oxide, calcium chloride, iron chloride and iron sulfate, more preferably iron chloride and/or iron sulfate.
The time of described addition inorganic flocculating agent reaction is preferably 10～30min, more preferably 20～25min.Described instead
The temperature answered can be room temperature.Reaction is preferably stirred in described reaction.
Described inorganic flocculating agent adds the most in form of an aqueous solutions, and the mass content of described inorganic flocculating agent aqueous solution is excellent
Electing 30%～60% as, in some embodiments of the invention, the mass content of described inorganic flocculating agent aqueous solution is
50%.The addition of described inorganic flocculating agent is 1～5mL/L, more preferably 1～3mL/L.
Then regulation system pH value, preferably regulation pH value is 6～9, currently preferred, uses alkali compounds regulation pH
Value, described alkali compounds can be alkali compounds well known in the art, preferably solid or liquid sodium hydroxide.
After regulation pH value, add organic flocculant.
Described organic flocculant is preferably macromolecule organic flocculating agent, more preferably polyacrylamide (PAM).
Described organic flocculant adds the most in form of an aqueous solutions, and the mass content of described organic flocculant aqueous solution is excellent
Elect 0.01%～0.1% as, more preferably 0.02%～0.06%；In some embodiments of the invention, described organic
The mass content of flocculant aqueous solution is 0.1%.The addition of described organic flocculant is preferably 1～10mL/L, more preferably 1
～5mL/L.
After adding organic flocculant, preferred system stirring 1～10min, more preferably stirring 1～5min, then stands
Precipitation, described in time of staticly settling be preferably 30～80min, more preferably 50～70min.
The present invention is by controlling pH value and other conditions of Strong oxdiative process, in second coagulation precipitation process, Ke Yijin
One step removes the metal ion directly can not removed by coagulation, as the metal ion of complex state and some lower valency be formed without heavy
The metal ion formed sediment, by controlling pH value and other conditions of twice coagulating sedimentation, it is possible to during the degree of depth removes waste water further
Residual metal ions, removes metal ion remaining in waste water further.
After standing, the supernatant enters depositing reservoir, continues subsequent processing steps, and precipitation carries out filter pressing separation.
Then the supernatant obtained entrance Sand Filtration System is carried out sand filtration, remove the little granule in waste water, prevent follow-up work
Skill blocks.
Carrying out carbon filter subsequently into carbon filter system, the part heavy metal of Adsorption remnants and a small amount of Organic substance, after preventing
The phenomenon that hardens of continuous resin.
In the present invention, Sand Filtration System, carbon that described Sand Filtration System, carbon filter system can be well known to those skilled in the art are filtered
System, the present invention there is no particular determination to this.
Then, the waste water after carbon is filtered enters a resin absorption tank and carries out resin absorption for the first time, adsorbs remaining Ni2 +、Cd2+、Pb2+、Co2+、Zn2+、Cu2+、Fe2+Deng metal ion.The described rate of adsorption is preferably 15～25m3/ hr, more preferably 15
～20m3/hr。
The resin that resin absorption uses for the first time is preferably bivalent cation adsorbent resin, specifically real in some of the present invention
Executing in example, the bivalent cation adsorbent resin that described resin provides for Xi'an Lanxiao Sci-Tech Co., Ltd., model is LSC-200；
Resin employed in present invention adsorption process for the first time is not limited to above-mentioned resin, it would however also be possible to employ other of market sale are same
Functional resin.
Waste water after a resin absorption enters secondary resin adsorption tanks, carries out second time resin absorption, absorption remnants
As3+、Tl3+、Tl+、As5+Deng metal ion.The described rate of adsorption is preferably 15～25m3/ hr, more preferably 15～20m3/
hr。
The resin that resin absorption uses for the second time is Tricationic adsorbent resin, in some embodiments of the invention
In, the Tricationic adsorbent resin that described resin provides for Xi'an Lanxiao Sci-Tech Co., Ltd., model is LSC-400；This
Resin employed in bright second time adsorption process is not limited to above-mentioned resin, it would however also be possible to employ other congenerous of market sale
Property resin.
The present invention selects above two resin, carry out resin absorption successively, the two exchange functional group and internal capillary hole
Structure is different with distribution, it is possible to reach adsorption effect more preferable to metal ion.
Waste water after treatment enters water tank, water after being processed, qualified discharge or reuse.
After process, the present invention, according to GB/T 22597-2008 " mensuration of COD in recycled water " standard, uses weight
Potassium chromate method, the mass content of organic substance (COD) in the method that the detection present invention provides；Use ICP-MS inductive etc. from
Daughter mass spectrograph, the mass content of each heavy metal ion in the method that the detection present invention provides.
Test result indicate that the waste water treatment process that the present invention provides can make the concentration of each heavy metal be down to " earth's surface water ring
Border quality standard " (GB3838-2002) three class water quality standard.
In order to further illustrate the present invention, below in conjunction with the embodiment processing method to the heavy metal wastewater thereby that the present invention provides
It is described in detail.
Embodiment 1
The heavy metal wastewater thereby using certain Usiminas to produce, tests, and wastewater treatment capacity is 50m3。
1) heavy metal wastewater thereby water quality is as follows, Tl:1.01ppm；Ni:4.8ppm；As:1.59ppm；Cd:25ppm；Cr:
0.53ppm；Pb:0.1ppm；Co: < 0.05ppm；Zn:460ppm；Cu:1158ppm；Fe:57.4ppm；PH is 7.3, particulate matter
Content 0.01%；
2) secondary filter: heavy metal wastewater thereby is passed through 100m2Filter press, more successively by 30 μm and the essence of 5 μm
Close bag filter；
3) coagulating sedimentation: the waste water after secondary filter pumps into reactor, 50% ferric chloride adding 50L is molten
Liquid, after stirring reaction 20min, using 38% sodium hydroxide solution regulation pH is 8.9, adds the 0.1% of 100L situ configuration
PAM solution, after stirring reaction 5min, stands 1h, and waste water enters next treatment process, and precipitate is separated by filter pressing；
4) Strong oxdiative: the waste water after a coagulating kinetics is regulated pH is 10, adds 10kg potassium permanganate oxidation anti-
After answering 2h, add 10kg calcium hypochlorite solid, oxidation reaction 1.5h；
5) second coagulation precipitation: add 50% liquor ferri trichloridi of 100L, stirring reaction in the waste water after Strong oxdiative
After 20min, using 38% sodium hydroxide solution regulation pH is 8.4, adds the 0.1%PAM solution of 100L situ configuration, stirring
After reaction 5min, standing 1h, supernatant enters depositing reservoir, and precipitate is separated by filter pressing；
6) sand filtration: the waste water after the clarification of clarified pond enters Sand Filtration System, and waste water flow velocity is 15m3/hr；
7) carbon filter: the waste water after sand filtration enters carbon filter system, and waste water flow velocity is 15m3/hr；
8) resin absorption: the waste water after carbon is filtered enters a resin absorption tank, and waste water flow velocity is 15m3/hr；Tree
Fat is bivalent cation adsorbent resin LSC-200；
9) secondary resin absorption: the waste water after a resin absorption enters secondary resin adsorption tanks, and waste water flow velocity is
15m3/ hr, the waste water after secondary resin is adsorbed enters water tank, water after being processed；Resin is Tricationic absorption tree
Fat LSC-400.
Take supernatant the COD in waste water and heavy metal are detected: Tl:4.3ppb, Ni:15.7ppb, As:
16.3ppb, Cd:3.2ppb, Cr:32ppb.
Embodiment 2
The heavy metal wastewater thereby using certain Usiminas to produce, tests, and wastewater treatment capacity is 47m3。
1) heavy metal wastewater thereby water quality is as follows, Tl:0.684ppm；Ni:10.87ppm；As:54.2ppm；Cd:86.3ppm；
Cr:0.283ppm；Pb:0.412ppm；Co:0.05ppm；Zn:598ppm；Cu:1023ppm；Fe:856.4ppm；PH is 6.9,
Particle content 0.012%；
2) secondary filter: heavy metal wastewater thereby is passed through 100m2Filter press, more successively by 30 μm and the essence of 5 μm
Close bag filter；
3) coagulating sedimentation: the waste water after secondary filter pumps into reactor, 50% ferric chloride adding 80L is molten
Liquid, after stirring reaction 20min, using 38% sodium hydroxide solution regulation pH is 10.4, adds the 0.1% of 50L situ configuration
PAM solution, after stirring reaction 5min, stands 1h, and waste water enters next treatment process, and precipitate is separated by filter pressing；
4) Strong oxdiative: the waste water after a coagulating kinetics is regulated pH is 12, adds 12kg potassium permanganate oxidation anti-
After answering 2h, add 15kg calcium hypochlorite solid, oxidation reaction 1.5h；
5) second coagulation precipitation: add 50% liquor ferri trichloridi of 100L, stirring reaction in the waste water after Strong oxdiative
After 20min, using 38% sodium hydroxide solution regulation pH is 7.5, adds the 0.1%PAM solution of 100L situ configuration, stirring
After reaction 5min, standing 1h, supernatant enters depositing reservoir, and precipitate is separated by filter pressing；
6) sand filtration: the waste water after the clarification of clarified pond enters Sand Filtration System, and waste water flow velocity is 15m3/hr；
7) carbon filter: the waste water after sand filtration enters carbon filter system, and waste water flow velocity is 15m3/hr；
8) resin absorption: the waste water after carbon is filtered enters a resin absorption tank, and waste water flow velocity is 15m3/hr；Tree
Fat is bivalent cation adsorbent resin LSC-200；
9) secondary resin absorption: the waste water after a resin absorption enters secondary resin adsorption tanks, and waste water flow velocity is
15m3/ hr, the waste water after secondary resin is adsorbed enters water tank, water after being processed；Resin is Tricationic absorption tree
Fat LSC-400.
Take supernatant the COD in waste water and heavy metal are detected: Tl:4.17ppb；Ni:9.35ppb；As:
23.56ppb；Cd:3.16ppb；Cr:24.54ppb；Pb:17.75ppb；Co:21.2ppb；Zn:39.58ppb；Cu:
157.86ppb；Fe:57.43ppb；PH is 7.4.
Embodiment 3
The heavy metal wastewater thereby using certain Usiminas to produce, tests, and wastewater treatment capacity is 45m3。
1) heavy metal wastewater thereby water quality is as follows, Tl:1.578ppm；Ni:340.87ppm；As:154.22ppm；Cd:
65.2ppm；Cr:0.481ppm；Pb:0.52ppm；Co:0.09ppm；Zn:1554ppm；Cu:2057ppm；Fe:459.3ppm；
PH is 6.9, particle content 0.03%；
2) secondary filter: heavy metal wastewater thereby is passed through 100m2Filter press, more successively by 30 μm and the essence of 5 μm
Close bag filter；
3) coagulating sedimentation: the waste water after secondary filter pumps into reactor, 50% ferric chloride adding 100L is molten
Liquid, after stirring reaction 20min, using 38% sodium hydroxide solution regulation pH is 11, adds the 0.1%PAM of 50L situ configuration
Solution, after stirring reaction 5min, stands 1h, and waste water enters next treatment process, and precipitate is separated by filter pressing；
4) Strong oxdiative: the waste water after a coagulating kinetics is regulated pH is 12.5, adds 9kg potassium permanganate oxidation anti-
After answering 2h, add 8kg calcium hypochlorite solid, oxidation reaction 1.5h；
5) second coagulation precipitation: add 50% liquor ferri trichloridi of 90L, stirring reaction in the waste water after Strong oxdiative
After 20min, using 38% sodium hydroxide solution regulation pH is 7.9, adds the 0.1%PAM solution of 100L situ configuration, stirring
After reaction 5min, standing 1h, supernatant enters depositing reservoir, and precipitate is separated by filter pressing；
6) sand filtration: the waste water after the clarification of clarified pond enters Sand Filtration System, and waste water flow velocity is 15m3/hr；
7) carbon filter: the waste water after sand filtration enters carbon filter system, and waste water flow velocity is 15m3/hr；
8) resin absorption: the waste water after carbon is filtered enters a resin absorption tank, and waste water flow velocity is 15m3/hr；Tree
Fat is bivalent cation adsorbent resin LSC-200；
9) secondary resin absorption: the waste water after a resin absorption enters secondary resin adsorption tanks, and waste water flow velocity is
15m3/ hr, the waste water after secondary resin is adsorbed enters water tank, water after being processed；Resin is Tricationic absorption tree
Fat LSC-400.
Take supernatant the COD in waste water and heavy metal are detected: Tl:2.75ppb；Ni:7.32ppb；As:
15.49ppb；Cd:2.45ppb；Cr:17.58ppb；Pb:17.86ppb；Co:76.43ppb；Zn:25.69ppb；Cu:
53.19ppb；Fe:46.87ppb；PH is 7.8.
Embodiment 4
The heavy metal wastewater thereby using certain Usiminas to produce, tests, and wastewater treatment capacity is 48m3。
1) heavy metal wastewater thereby water quality is as follows, Tl:1.952ppm；Ni:90.25ppm；As:15.74ppm；Cd:
300.28ppm；Cr:0.238ppm；Pb:0.13ppm；Co:0.03ppm；Zn:2157ppm；Cu:2381ppm；Fe:
959.6ppm；PH is 6.7, particle content 0.027%；
2) secondary filter: heavy metal wastewater thereby is passed through 100m2Filter press, more successively by 30 μm and the essence of 5 μm
Close bag filter；
3) coagulating sedimentation: the waste water after secondary filter pumps into reactor, 50% ferric chloride adding 50L is molten
Liquid, after stirring reaction 20min, using 38% sodium hydroxide solution regulation pH is 12, adds the 0.1%PAM of 80L situ configuration
Solution, after stirring reaction 5min, stands 1h, and waste water enters next treatment process, and precipitate is separated by filter pressing；
4) Strong oxdiative: the waste water after a coagulating kinetics is regulated pH is 12.5, adds 12kg potassium permanganate oxidation
After reaction 2h, add 15kg calcium hypochlorite solid, oxidation reaction 1.5h；
5) second coagulation precipitation: add 50% liquor ferri trichloridi of 100L, stirring reaction in the waste water after Strong oxdiative
After 20min, using 38% sodium hydroxide solution regulation pH is 8.6, adds the 0.1%PAM solution of 100L situ configuration, stirring
After reaction 5min, standing 1h, supernatant enters depositing reservoir, and precipitate is separated by filter pressing；
6) sand filtration: the waste water after the clarification of clarified pond enters Sand Filtration System, and waste water flow velocity is 15m3/hr；
7) carbon filter: the waste water after sand filtration enters carbon filter system, and waste water flow velocity is 15m3/hr；
8) resin absorption: the waste water after carbon is filtered enters a resin absorption tank, and waste water flow velocity is 15m3/hr；Tree
Fat is bivalent cation adsorbent resin LSC-200；
9) secondary resin absorption: the waste water after a resin absorption enters secondary resin adsorption tanks, and waste water flow velocity is
15m3/ hr, the waste water after secondary resin is adsorbed enters water tank, water after being processed；Resin is Tricationic absorption tree
Fat LSC-400.
Take supernatant the COD in waste water and heavy metal are detected: Tl:3.17ppb；Ni:4.30ppb；As:
10.39ppb；Cd:1.46ppb；Cr:19.32ppb；Pb:15.85ppb；Co:16.18ppb；Zn:89.67ppb；Cu:
37.42ppb；Fe:96.86ppb；PH is 8.5.
From above-described embodiment, the processing method of the heavy metal wastewater thereby that the present invention provides, there is higher treatment effeciency,
And it is stable.
The explanation of above example is only intended to help to understand method and the core concept thereof of the present invention.It is right to it should be pointed out that,
For those skilled in the art, under the premise without departing from the principles of the invention, it is also possible to the present invention is carried out
Some improvement and modification, these improve and modify in the protection domain also falling into the claims in the present invention.
Claims (10)
1. the processing method of a heavy metal wastewater thereby, it is characterised in that including:
A) heavy metal wastewater thereby is filtered；
B) waste water after filtering mixes with inorganic flocculating agent, and then regulation pH value is 8～12, adds organic flocculant, filters
Remove precipitation, obtain supernatant；
C) by step B) supernatant that obtains regulation pH value is 9～13, reacts with potassium permanganate, calcium hypochlorite successively；
D) by step C) reacted waste water mixes with inorganic flocculating agent, and then regulation pH value is 6～9, adds organic flocculant,
It is filtered to remove precipitation, obtains supernatant；
E) by step D) supernatant that obtains carries out sand filtration, carbon filter, for the first time resin absorption, for the second time resin absorption successively,
Water after process.
Processing method the most according to claim 1, it is characterised in that described heavy metal wastewater thereby includes Ni2+, As3+, Cd2+,
Tl+, Cr3+, Pb2+, Co2+, Zn2+, Cu2+, Fe2+, Fe3+, float and particulate matter.
Processing method the most according to claim 1, it is characterised in that described filtration specially first passes through filter press
Filter, then filtered by 5～30 μm bag filters.
Processing method the most according to claim 3, it is characterised in that described filtration specially first passes through filter press
Filter, then pass sequentially through 20～30 μm, 5～10 μm bag filter filter.
Processing method the most according to claim 1, it is characterised in that described inorganic flocculating agent is aluminium flocculating agent, calcium flocculation
Agent or ferric flocculant.
Processing method the most according to claim 1, it is characterised in that described organic flocculant is macromolecule organic-flocculation
Agent.
Processing method the most according to claim 6, it is characterised in that described organic flocculant is polyacrylamide.
Processing method the most according to claim 1, it is characterised in that described step B) regulation pH value be 8～12, described step
Rapid D) regulation pH value is 6～9.
Processing method the most according to claim 1, it is characterised in that the consumption of described potassium permanganate is 0.1～1g/L, institute
The consumption stating calcium hypochlorite is 0.1～1g/L.
Processing method the most according to claim 1, it is characterised in that the rate of adsorption of described first time resin absorption is
15～25m3/ hr, the rate of adsorption of described second time resin absorption is 15～25m3/hr。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108083503A (en) * | 2017-12-28 | 2018-05-29 | 连云港绿润环保科技有限公司 | A kind of floated heavy metal ions in sewage removal technique of precipitation |
| CN108423891A (en) * | 2018-05-24 | 2018-08-21 | 张家港市清泉水处理有限公司 | A kind of sewage disposal system and its processing method containing zinc ion |
| CN110790433A (en) * | 2019-12-01 | 2020-02-14 | 柏威达(南京)环境科技有限公司 | Treatment process of industrial aluminum production wastewater |
| CN111498973A (en) * | 2020-05-14 | 2020-08-07 | 北京中科康仑环境科技研究院有限公司 | Heavy metal wastewater treatment agent and treatment method thereof |
| CN112678987A (en) * | 2019-10-18 | 2021-04-20 | 中国石油化工股份有限公司 | Treatment method and application of high-COD high-phosphorus heavy metal-containing sewage |
| CN117566882A (en) * | 2024-01-16 | 2024-02-20 | 新乡化纤股份有限公司 | Method for removing impurities in ionic liquid aqueous solution |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117566882A (en) * | 2024-01-16 | 2024-02-20 | 新乡化纤股份有限公司 | Method for removing impurities in ionic liquid aqueous solution |
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