CN109626647A - Commercial metal sewage water treatment method based on flocfloatation precipitating - Google Patents

Commercial metal sewage water treatment method based on flocfloatation precipitating Download PDF

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Publication number
CN109626647A
CN109626647A CN201910010691.6A CN201910010691A CN109626647A CN 109626647 A CN109626647 A CN 109626647A CN 201910010691 A CN201910010691 A CN 201910010691A CN 109626647 A CN109626647 A CN 109626647A
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precipitating
air bag
flocfloatation
parts
tube
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CN201910010691.6A
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CN109626647B (en
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鲁仕宝
曾辉
李蔚
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Zhejiang University of Finance and Economics
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Zhejiang University of Finance and Economics
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/24Treatment of water, waste water, or sewage by flotation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/283Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • C02F1/76Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/20Heavy metals or heavy metal compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds

Abstract

The present invention relates to technical field of water pollution treatment, more particularly to the commercial metal sewage water treatment method based on flocfloatation precipitating, including Air Exposure step, pH value adjustment step, flocculation step, air bearing step, precipitating filtration step, the flocculant used is using water hyacinth healthy plant as raw material, in conjunction with polyaluminum ferric chloride after being modified using modified conch meal, chitosan, final and nano zine oxide/carbon quantum dot complexing agent carries out being mixed and made into final flocculant.Commercial metal sewage water treatment method based on flocfloatation precipitating of the invention, using water hyacinth plant as raw material, cost is relatively low, can effectively handle the heavy metal ion in sewage, will not generate secondary pollution, and treatment effect is more stable.

Description

Commercial metal sewage water treatment method based on flocfloatation precipitating
Technical field
The present invention relates to technical field of sewage, more particularly at the commercial metal sewage based on flocfloatation precipitating Reason method.
Background technique
Water be production base, ecology want, Source of life, water as preciousness resource should be to its enough attention, in recent years Come, with the rapid development of industry in addition the backwardness of sewage disposal technology and to sewage treatment consciousness deficiency, lead to many dirts Water is discharged wantonly, causes serious environmental pollution and water resource waste, and often contain in the industrial wastewater discharged or it is more or Few heavy metal.
Heavy metal wastewater thereby is a kind of with the useless of the characteristics such as virulent property, carcinogenicity, mutagenicity, difficult to degrade and easy enrichment Water, has the characteristics that toxic effect, long duration, biological non-biodegradable, heavy metal or is dissolved in sewage, or suspends In sewage, it cannot be degraded by microorganisms, it can only Transport And Transformation, generation point between water, substrate and biology with different valence states It dissipates and enrichment, Heavy Metals in Waters runs up to certain limit and will generate to water body, water plant, aquatic animal system It seriously endangers, damage symptoms occurs in organism, and physiology is obstructed, arrest of development, or even dead, and makes entire aquatic ecosystem knot Structure and function are impaired, collapse, while entering human body it is also possible to acting on by food chain, and accumulate in human body, so as to cause Various diseases and disorder, finally cause to seriously endanger to human health, with the development of industry, heavy metal pollution also by Pay attention to extensively.
Existing sewage disposal technology can be divided into physical method, chemical method, physical-chemical process and bioanalysis, physics according to principle Method is by physical action, and undissolved in suspended state polluter in waste water to separate, recycle, there are commonly Gravity Separations Method, centrifugal separation, filtration method etc..Method of chemical treatment adds certain chemical substance into sewage, is divided using chemical reaction From, recycling sewage in polluter, there are commonly chemical precipitation method, Coagulation Method, neutralisation, oxidation-reduction methodes etc.;It is physico Method be utilize physics chemical action removal waste water in polluter, mainly have absorption method, ion-exchange, membrane separation process, Extraction etc.;Biological treatment is the metabolism by microorganism, is made in waste water in solution, colloid and fine suspended state Organic pollution materials be converted into stablize, harmless substance, aerobic biological treatment and Anaerobic biotreatment method can be divided into.
And that more or less all there is removal effects is unstable, be easy to produce secondary pollution and processing cost is high for these methods The disadvantages of, therefore, a kind of method for how selecting reasonable, effective, practical heavy-metal ion removal is generally to face at present Problem.
Summary of the invention
In view of this, the object of the present invention is to provide the commercial metal sewage water treatment method precipitated based on flocfloatation, Using water hyacinth as raw material, flocculant is made, cost is relatively low, handles the heavy metal ion in sewage, will not generate secondary Pollution, and treatment effect is more stable.
The present invention solves above-mentioned technical problem by following technological means:
Commercial metal sewage water treatment method based on flocfloatation precipitating, comprising the following steps:
Air Exposure: sewage is discharged into aeration tank, sprays O through nanometer aeration head from the bottom of aeration tank3Gas carries out 3~4h of Air Exposure;
PH value is adjusted: will be discharged into conditioning tank by the sewage of Air Exposure, sodium carbonate/bicarbonate is added into conditioning tank Buffer solution, adjusting pH is 6~7;
Flocculation: being discharged into treatment tank for the sewage for adjusting processing by pH value, flocculant be added into treatment tank, 5min is stirred with the speed of 300rpm, then stands 2h;
Air bearing: the sewage after flocculation is placed in flotation column and carries out flotation;
Precipitating filtering: the sewage after flotation is placed in sedimentation basin, is staticly settled.
Sewage water treatment method of the invention aoxidizes the substance in sewage, first by Air Exposure in order to rear Continuous processing, and by adjusting pH value of sewage water to slightly sour environment, being conducive to flocculant preferably plays flocculation, will be dirty Heavy metal in water agglomerates out, finally will agglomerate out heavy metal aggregate by air bearing and settling step again and gone It removes, to achieve the purpose that carry out purified treatment to commercial metal sewage.
Further, flocculant used in the flocculation step includes the raw material of following parts by weight: modified water hyacinth gas 20~30 parts of capsular fibers beam tube, 1~2 part of calcium hypochlorite, 0.1~0.5 part of polyaluminum ferric chloride, nano zine oxide/carbon quantum dot 15~20 parts of complexing agent, 5~10 parts of sepiolite, 10~15 parts of active carbon and 5~10 parts of zeolite.
Further, the flocculant includes the raw material of following parts by weight: modified 25 parts of water hyacinth air bag fiber beam tube, secondary chlorine 1.5 parts of sour calcium, 0.4 part of polyaluminum ferric chloride, nano zine oxide/15 parts of carbon quantum dot complexing agent, 8 parts of sepiolite, active carbon 14 Part and 9 parts of zeolite.
Further, the flocculant the preparation method is as follows: weighing modified water hyacinth air bag fiber beam tube and nanometer respectively Zinc oxide/carbon quantum dot complexing agent is added in blender and stirs 30min in the speed of 100rpm, is uniformly mixed it, is mixed Object A is closed, then polyaluminum ferric chloride is added in ball mill, ball milling 3h, adds Hai Pao under the speed of 300~350rpm Stone, zeolite, ball milling 2h, is eventually adding active carbon and bonding agent under the speed of 200~300rpm, in the speed of 100~120rpm Lower ball milling 1h is spent, mixture B is obtained, mixture A is added in mixture B, add calcium hypochlorite, carry out sonic oscillation mixing Afterwards, mixed material is placed in baking oven, 10~15min of freeze-day with constant temperature at a temperature of 65~75 DEG C obtains flocculant powder, Yu Gan Dry shady place is sealed.
It is compound by modified water hyacinth air bag fiber and nano zine oxide/carbon quantum dot, it can be to commercial metal dirt Heavy metal ion in water carries out flocculation sedimentation, while can decompose to the organic substance in sewage, prevents its package wadding Solidifying agent, reduces flocculating effect;In addition it is also added into polyaluminum ferric chloride, calcium hypochlorite, active carbon in flocculant, has certain Absorption and the effect of sterilization by grading ball milling partial size between each substance is more matched, in conjunction with more evenly, and by its It is combined on modified water hyacinth air bag fiber beam tube as raw material, the absorption that can increase modified water hyacinth air bag fiber beam tube is made With increase flocculating effect;In addition, on the one hand on the other hand the zeolite and sepiolite of addition can increase as support aggregate Add the weight of flocculant, while sepiolite can absorb moisture during use, further increase weight, can prevent from flocculating Agent is swum on the water surface during use, and flocculated effect is caused to reduce.
Further, the modified water hyacinth air bag fiber beam tube be using healthy water hyacinth plant as raw material, after pretreatment, Be added 0.5%~1.0% weight ratio modification conch meal, be uniformly mixed, obtain air bag fiber beam tube, take air bag fiber beam tube with Etc. quality polyaluminum ferric chloride mixing, obtain solid mixture, by solid mixture carry out Far-infrared Heating to 70~75 DEG C, It is stirred in heating process, while spraying into 1% chitosan acetic acid solution, the quality of chitosan is gas in the chitosan acetic acid solution The 0.05%~0.2% of capsular fibers beam tube quality continues to stir 5-10min after having sprayed, and obtains modified water hyacinth air bag fibre bundle Pipe.
It is compound to the progress of water hyacinth air bag fiber beam tube using modified conch meal, since modified conch meal has relatively by force Absorption property, therefore the absorption property of water hyacinth air bag fiber beam tube can be increased to a certain extent, increase its flocculation effect Fruit, and chitosan acetic acid solution has been sprayed into during Far-infrared Heating, because having free amine group in chitosan molecule, in acid Property solution in the performance of cationic flocculating purifying agent on the one hand can make air bag fiber beam tube under infrared ray oxidizing condition It is sufficiently combined with polyaluminum ferric chloride, makes heavy metal ion by capillarity in sewage, be flocculated cleanser and quickly seep It absorbs thoroughly, improves heavy metals removal effect, on the other hand, during penetrating, chitosan acetic acid solution is dispersed in solid The surface of body mixture, under the conditions of infrared heating, acetic acid is evaporated, and chitosan is precipitated, and is combined on air bag fiber beam tube, Certain connection function is played between the modified gentle capsular fibers beam tube of conch meal simultaneously, so that the two is in conjunction with closer.
Further, the pretreatment is the water hyacinth healthy plant for taking balloon sites average diameter as 2.5cm~4.5cm, Cutting obtains the axis of 0.5~1cm of air bag and air bag or more, is dried in vacuo, and the dry moisture percentage to axis is 20%~30%, surface layer is stripped, then shears the surface layer that removing obtains, crosses 30 meshes.
Further, the modified conch meal is by shell through overpickling, after 700 DEG C of temperature lower calcinations, through nanometer pulverization Machine crushes to obtain modified conch meal.
The organic matter of shell outer surface and impurity can be dispelled by pickling, and after 700 DEG C of temperature lower calcination, meeting It is spread on shell there are many tiny micropore, thus further improves the adsorption capacity of conch meal.
Further, the nano zine oxide/carbon quantum dot complexing agent is the preparation method is as follows: weigh barium stearate and insatiable hunger It is placed in reaction kettle with fatty acid, after being heated to 25~35 DEG C, adds surfactant, deionized water, defoaming agent, in 60~ 80 DEG C, disperse 20~30min under the conditions of 500rpm, after being cooled to room temperature, nano-zinc oxide powder, deionized water, dispersion is added Agent, heating water bath disperse 40~60min in 200~300rpm and obtain nano zinc oxide fluid dispersion, take carbon quantum to 25~30 DEG C Point solution is added in zinc oxide fluid dispersion, after being stirred, mixed liquor is placed in autoclave, in 80~100 DEG C of item 3~5h is reacted under part, and after being cooled to room temperature, by product washing, centrifugation, drying, it is compound to obtain nano zine oxide/carbon quantum dot Agent.
Using barium stearate as dispersion liquid, so that nano zinc oxide fluid dispersion dispersion is more evenly, while the surface being added Activating agent reduces by two interphase interface tension, subtracts less granular reunion.
Further, the nano zine oxide spatially flower-like structure, and specific surface area is 1000~1200 ㎡/g.Stereo-flower Shape structure has the contact point of biggish specific surface area and carbon quantum dot more, in conjunction with closer.
Further, the mass ratio of the barium stearate and unsaturated fatty acid is 1:2.
Beneficial effects of the present invention:
(1) present invention passes through Air Exposure step, pH value adjustment step, flocculation step, air bearing step, precipitating filtration step Waste water containing heavy metal ion is handled, treatment effect is more stable, and will not generate secondary pollution.
(2) flocculant used in flocculant step uses water hyacinth plant for raw material, and on the one hand cost is relatively low, separately On the one hand it can solve the problem of that the water hyacinth excessive multiplication of the existing country causes water pollution to a certain extent, simultaneously Water hyacinth air bag fiber beam tube is modified using modified conch meal, chitosan, make water hyacinth air bag fiber beam tube with polymerize Aluminium chloride ferrum sufficiently combines, and improves heavy metals removal effect to a certain extent.
(3) nano zine oxide/carbon quantum dot complexing agent has good dispersion performance, and zinc oxide has photocatalysis, The organic pollutant in sewage can be decomposed under Illumination adjusting, can further enhance the flocculation to heavy metal, moreover it is possible to Enough decomposing organic matters under illumination condition, avoid organic matter from causing to wrap up to flocculant, influence flocculating effect, further increase weight Metal wastewater purifying efficiency.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in detail:
The system of flocculant used in commercial metal sewage water treatment method based on flocfloatation precipitating of the invention Preparation Method is as follows:
Embodiment one
The preparation of modified conch meal: drying at 60 DEG C after shell is cleaned, the nitric acid solution of 0.1mol/L be added, in Back flow reaction 2h, after reaction takes out shell at 75 DEG C, is washed with deionized to neutrality, dries and be placed on calcining furnace In, 700 DEG C of calcining 4h are warming up to, takes out after cooling to room temperature with the furnace, is crushed with nano grinder, obtain modified conch meal.
It prepares chitosan acetic acid solution: weighing 2g chitosan, 100mL water is added, adds 2mL glacial acetic acid, stirs evenly Afterwards, 85 DEG C are heated to, water is added to be settled to 100mL, 45min is kept the temperature, obtains 1% chitosan acetic acid solution.
The preparation of modified water hyacinth air bag fiber beam tube: taking balloon sites average diameter is the water hyacinth of 2.5cm~4.5cm Healthy plant, cutting obtain the axis of air bag and air bag or more 0.5cm, and the moisture percentage for be dried under vacuum to axis is 20% or so, surface layer is stripped, the surface layer then removed is sheared, and is crossed 30 meshes, is added 0.5% weight ratio Modified conch meal is uniformly mixed, obtains air bag fiber beam tube, take air bag fiber beam tube with etc. quality polyaluminum ferric chloride it is mixed It closes, obtains solid mixture, solid mixture is subjected to Far-infrared Heating to 75 DEG C, is stirred in heating process, sprays simultaneously Enter 1% chitosan acetic acid solution, wherein the quality of chitosan is air bag fiber beam tube quality in chitosan acetic acid solution 0.05%, after having sprayed, continue to stir 5min, obtains modified water hyacinth air bag fiber beam tube.
The preparation of nano zine oxide/carbon quantum dot complexing agent: weighing 5kg barium stearate and 10kg unsaturated fatty acid is placed in In reaction kettle, after being heated to 25 DEG C, add 0.1kg surfactant, 5kg deionized water, 0.01kg defoaming agent, in 60 DEG C, Disperse 30min under the conditions of 500rpm, after being cooled to room temperature, be added 10kg spatially flower-shaped nano-zinc oxide powder, 5kg go from Sub- water, 0.2kg dispersing agent, heating water bath obtain nano zinc oxide fluid dispersion to 30 DEG C, in 200rpm dispersion 60min, take 5kg carbon Quantum dot solution is added in zinc oxide fluid dispersion, after being stirred, mixed liquor is placed in autoclave, in 80 DEG C of condition Lower reaction 5h after being cooled to room temperature, by product washing, centrifugation, drying, obtains nano zine oxide/carbon quantum dot complexing agent.
The preparation of flocculant: the modified water hyacinth air bag fiber beam tube of 20kg and 20kg nano zine oxide/carbon amounts are weighed respectively Son point complexing agent, is added in blender and stirs 30min in the speed of 100rpm, be uniformly mixed it, obtain mixture A, then 0.1kg polyaluminum ferric chloride is added in ball mill, the ball milling 3h under the speed of 300rpm, adds 10kg sepiolite, 5kg boiling Stone, the ball milling 2h under the speed of 250rpm, is eventually adding 10kg active carbon and 0.1kg bonding agent, the ball under the speed of 100rpm 1h is ground, mixture B is obtained, mixture A is added in mixture B, 1kg calcium hypochlorite is added, under the conditions of 30kHz, 120W After carrying out sonic oscillation mixing, mixed material is placed in baking oven, freeze-day with constant temperature 15min, obtains flocculant at a temperature of 65 DEG C Powder is sealed in dry shady place.
Preparation gained flocculant powder sewage treatment application, it is specific as follows:
Air Exposure: sewage is discharged into aeration tank, and aeration bottom of pond portion is equipped with multiple nanometer aeration heads, passes through aeration tank Bottom through nanometer aeration head spray O3Gas, single nanometer aeration head spray O by the flow of 3L/min3Gas carries out at aeration Manage 3~4h;
PH value is adjusted: will be discharged into conditioning tank by the sewage of Air Exposure, sodium carbonate/bicarbonate is added into conditioning tank Buffer solution, adjusting pH is 6~7;
Flocculation: the sewage for adjusting processing by pH value is discharged into treatment tank, into treatment tank according to 1kg/m3 Amount flocculant is added, and 5min is stirred with the speed of 300rpm, then stands 2h;
Air bearing: the sewage after flocculation being placed in flotation column and carries out flotation, is generated eddy flow by tangentially intaking, is intake simultaneously It is sufficiently mixed with internal circulating load for 2~3 times of dissolved air water of amount of inlet water, so that microbubble is sufficiently contacted with suspended particulate in water, Through flotation column static state buoyance lift section, suspended particulate is carried to column top flotation cell and is discharged;
Precipitating filtering: the sewage after flotation being placed in sedimentation basin, is staticly settled for 24 hours, so that remaining outstanding in sewage Floating particles are further reunited, are precipitated, to achieve the purpose that sufficiently to remove.
Embodiment two
The preparation of modified conch meal is the same as example 1.
Chitosan acetic acid solution is prepared to be the same as example 1.
The preparation of modified water hyacinth air bag fiber beam tube: taking balloon sites average diameter is the water hyacinth of 2.5cm~4.5cm Healthy plant, cutting obtain the axis of air bag and air bag or more 0.5cm, and the moisture percentage for be dried under vacuum to axis is 25% or so, surface layer is stripped, the surface layer then removed is sheared, and is crossed 30 meshes, is added 0.8% weight ratio Modified conch meal is uniformly mixed, obtains air bag fiber beam tube, take air bag fiber beam tube with etc. quality polyaluminum ferric chloride it is mixed It closes, obtains solid mixture, solid mixture is subjected to Far-infrared Heating to 70 DEG C, is stirred in heating process, sprays simultaneously Enter 1% chitosan acetic acid solution, wherein the quality of chitosan is air bag fiber beam tube quality in chitosan acetic acid solution 0.18%, after having sprayed, continue to stir 10min, obtains modified water hyacinth air bag fiber beam tube.
The preparation of nano zine oxide/carbon quantum dot complexing agent: weighing 5kg barium stearate and 10kg unsaturated fatty acid is placed in In reaction kettle, after being heated to 28 DEG C, add 0.1kg surfactant, 5kg deionized water, 0.01kg defoaming agent, in 70 DEG C, Disperse 25min under the conditions of 500rpm, after being cooled to room temperature, be added 10kg spatially flower-shaped nano-zinc oxide powder, 5kg go from Sub- water, 0.2kg dispersing agent, heating water bath obtain nano zinc oxide fluid dispersion to 25 DEG C, in 300rpm dispersion 50min, take 5kg carbon Quantum dot solution is added in zinc oxide fluid dispersion, after being stirred, mixed liquor is placed in autoclave, in 85 DEG C of condition Lower reaction 4h after being cooled to room temperature, by product washing, centrifugation, drying, obtains nano zine oxide/carbon quantum dot complexing agent.
The preparation of flocculant: the modified water hyacinth air bag fiber beam tube of 20kg and 15kg nano zine oxide/carbon amounts are weighed respectively Son point complexing agent, is added in blender and stirs 30min in the speed of 100rpm, be uniformly mixed it, obtain mixture A, then 0.5kg polyaluminum ferric chloride is added in ball mill, the ball milling 3h under the speed of 325rpm, adds 5kg sepiolite, 10kg boiling Stone, the ball milling 2h under the speed of 200rpm, is eventually adding 12kg active carbon and 0.1kg bonding agent, the ball under the speed of 110rpm 1h is ground, mixture B is obtained, mixture A is added in mixture B, 1.5kg calcium hypochlorite is added, in 30kHz, 120W condition After lower progress sonic oscillation mixing, mixed material is placed in baking oven, freeze-day with constant temperature 15min, is flocculated at a temperature of 70 DEG C Agent powder is sealed in dry shady place.
The present embodiment prepares gained flocculant powder in the application of sewage treatment, and application method is the same as example 1.
Embodiment three
The preparation of modified conch meal is the same as example 1.
Chitosan acetic acid solution is prepared to be the same as example 1.
The preparation of modified water hyacinth air bag fiber beam tube: taking balloon sites average diameter is the water hyacinth of 2.5cm~4.5cm Healthy plant, cutting obtain the axis of air bag and air bag or more 1cm, and the moisture percentage for carrying out being dried under vacuum to axis is 20% Left and right, strips surface layer, and the surface layer then removed is sheared, and crosses 30 meshes, adds changing for 0.15% weight ratio Property conch meal, be uniformly mixed, obtain air bag fiber beam tube, take air bag fiber beam tube with etc. the polyaluminum ferric chloride of quality mix, Solid mixture is obtained, solid mixture is subjected to Far-infrared Heating to 72 DEG C, is stirred in heating process, sprays into simultaneously 1% chitosan acetic acid solution, wherein the quality of chitosan is the 0.10% of air bag fiber beam tube quality in chitosan acetic acid solution, After having sprayed, continue to stir 8min, obtains modified water hyacinth air bag fiber beam tube.
The preparation of nano zine oxide/carbon quantum dot complexing agent: weighing 5kg barium stearate and 10kg unsaturated fatty acid is placed in In reaction kettle, after being heated to 35 DEG C, add 0.1kg surfactant, 5kg deionized water, 0.01kg defoaming agent, in 80 DEG C, Disperse 20min under the conditions of 500rpm, after being cooled to room temperature, be added 10kg spatially flower-shaped nano-zinc oxide powder, 5kg go from Sub- water, 0.2kg dispersing agent, heating water bath obtain nano zinc oxide fluid dispersion to 25 DEG C, in 250rpm dispersion 40min, take 5kg carbon Quantum dot solution is added in zinc oxide fluid dispersion, after being stirred, mixed liquor is placed in autoclave, in 100 DEG C of item 3h is reacted under part, after being cooled to room temperature, by product washing, centrifugation, drying, obtains nano zine oxide/carbon quantum dot complexing agent.
The preparation of flocculant: the modified water hyacinth air bag fiber beam tube of 30kg and 18kg nano zine oxide/carbon amounts are weighed respectively Son point complexing agent, is added in blender and stirs 30min in the speed of 100rpm, be uniformly mixed it, obtain mixture A, then 0.3kg polyaluminum ferric chloride is added in ball mill, the ball milling 3h under the speed of 350rpm, adds 6kg sepiolite, 10kg boiling Stone, the ball milling 2h under the speed of 300rpm, is eventually adding 15kg active carbon and 0.1kg bonding agent, the ball under the speed of 120rpm 1h is ground, mixture B is obtained, mixture A is added in mixture B, 2kg calcium hypochlorite is added, under the conditions of 30kHz, 120W After carrying out sonic oscillation mixing, mixed material is placed in baking oven, freeze-day with constant temperature 13min, obtains flocculant at a temperature of 75 DEG C Powder is sealed in dry shady place.
The present embodiment prepares gained flocculant powder in the application of sewage treatment, and application method is the same as example 1.
Example IV
The preparation of modified conch meal is the same as example 1.
Chitosan acetic acid solution is prepared to be the same as example 1.
The preparation of modified water hyacinth air bag fiber beam tube: taking balloon sites average diameter is the water hyacinth of 2.5cm~4.5cm Healthy plant, cutting obtain the axis of air bag and air bag or more 0.8cm, and the moisture percentage for be dried under vacuum to axis is 25% or so, surface layer is stripped, the surface layer then removed is sheared, and is crossed 30 meshes, is added 0.2% weight ratio Modified conch meal is uniformly mixed, obtains air bag fiber beam tube, take air bag fiber beam tube with etc. quality polyaluminum ferric chloride it is mixed It closes, obtains solid mixture, solid mixture is subjected to Far-infrared Heating to 75 DEG C, is stirred in heating process, sprays simultaneously Enter 1% chitosan acetic acid solution, wherein the quality of chitosan is air bag fiber beam tube quality in chitosan acetic acid solution 0.16%, after having sprayed, continue to stir 10min, obtains modified water hyacinth air bag fiber beam tube.
The preparation of nano zine oxide/carbon quantum dot complexing agent: weighing 5kg barium stearate and 10kg unsaturated fatty acid is placed in In reaction kettle, after being heated to 28 DEG C, add 0.1kg surfactant, 5kg deionized water, 0.01kg defoaming agent, in 75 DEG C, Disperse 28min under the conditions of 500rpm, after being cooled to room temperature, be added 10kg spatially flower-shaped nano-zinc oxide powder, 5kg go from Sub- water, 0.2kg dispersing agent, heating water bath obtain nano zinc oxide fluid dispersion to 28 DEG C, in 220rpm dispersion 55min, take 5kg carbon Quantum dot solution is added in zinc oxide fluid dispersion, after being stirred, mixed liquor is placed in autoclave, in 95 DEG C of condition Lower reaction 4.5h after being cooled to room temperature, by product washing, centrifugation, drying, obtains nano zine oxide/carbon quantum dot complexing agent.
The preparation of flocculant: the modified water hyacinth air bag fiber beam tube of 25kg and 15kg nano zine oxide/carbon amounts are weighed respectively Son point complexing agent, is added in blender and stirs 30min in the speed of 100rpm, be uniformly mixed it, obtain mixture A, then 0.4kg polyaluminum ferric chloride is added in ball mill, the ball milling 3h under the speed of 320rpm, adds 8kg sepiolite, 9kg boiling Stone, the ball milling 2h under the speed of 240rpm, is eventually adding 14kg active carbon and 0.1kg bonding agent, the ball under the speed of 110rpm 1h is ground, mixture B is obtained, mixture A is added in mixture B, 1.5kg calcium hypochlorite is added, in 30kHz, 120W condition After lower progress sonic oscillation mixing, mixed material is placed in baking oven, freeze-day with constant temperature 15min, is flocculated at a temperature of 70 DEG C Agent powder is sealed in dry shady place.
The present embodiment prepares gained flocculant powder in the application of sewage treatment, and application method is the same as example 1.
The three-dimensional flower-like structure of nano zine oxide is referring to Publication No. in one~example IV of above-described embodiment Method in " CN106830052B " Chinese invention patent prepares gained.
Learn that the Heavy Metals ion in sewage includes Pb by carrying out detection to sewage2+Ion, Cr6+Ion, Cu2+ Ion and Cd2+Ion, by the sewage in one~example IV of embodiment, before treatment after content of beary metal is examined It surveys, testing result is as shown in the table:
As can be seen from the above table, method of the invention, it is possible to effectively remove the heavy metal in commercial metal sewage from Son, and secondary pollution will not be generated;Flocculant prepared by the present invention is to the Pb in sewage simultaneously2+Ion, Cr6+Ion, Cu2+From Son, Cd2+Ion all has stronger suction-operated, easy to operate convenient for separation after adsorption treatment in sewage treatment.
The above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to preferred embodiment to this hair It is bright to be described in detail, those skilled in the art should understand that, it can modify to technical solution of the present invention Or equivalent replacement should all cover without departing from the objective and range of technical solution of the present invention in claim of the invention In range.Technology not described in detail in the present invention, shape, construction portion are well-known technique.

Claims (10)

1. the commercial metal sewage water treatment method based on flocfloatation precipitating, which comprises the following steps:
Air Exposure: sewage is discharged into aeration tank, and the bottom of aeration tank sprays O through nanometer aeration head3Gas carries out Air Exposure 3~4h;
PH value is adjusted: will be discharged into conditioning tank by the sewage of Air Exposure, sodium carbonate/bicarbonate buffering is added into conditioning tank Solution, adjusting pH is 6~7;
Flocculation: being discharged into treatment tank for the sewage for adjusting processing by pH value, flocculant be added into treatment tank, with The speed of 300rpm stirs 5min, then stands 2h;
Air bearing: the sewage after flocculation is placed in flotation column and carries out flotation;
Precipitating filtering: the sewage after flotation is placed in sedimentation basin, is staticly settled.
2. the commercial metal sewage water treatment method according to claim 1 based on flocfloatation precipitating, which is characterized in that The flocculant includes the raw material of following parts by weight: modified 20~30 parts of water hyacinth air bag fiber beam tube, 1~2 part of calcium hypochlorite, 0.1~0.5 part of polyaluminum ferric chloride, nano zine oxide/15~20 parts of carbon quantum dot complexing agent, 5~10 parts of sepiolite, active carbon 10~15 parts and 5~10 parts of zeolite.
3. the commercial metal sewage water treatment method according to claim 2 based on flocfloatation precipitating, which is characterized in that The flocculant includes the raw material of following parts by weight: modified 25 parts of water hyacinth air bag fiber beam tube, 1.5 parts of calcium hypochlorite, polymerization 0.4 part of aluminium chloride ferrum, nano zine oxide/15 parts of carbon quantum dot complexing agent, 8 parts of sepiolite, 14 parts of active carbon and 9 parts of zeolite.
4. the commercial metal sewage water treatment method according to claim 2 based on flocfloatation precipitating, which is characterized in that The flocculant the preparation method is as follows: weighing modified water hyacinth air bag fiber beam tube and nano zine oxide/carbon quantum dot respectively Complexing agent is added in blender and stirs 30min in the speed of 100rpm, is uniformly mixed it, obtains mixture A, then will gather Aluminium chloride ferrum is closed to be added in ball mill, the ball milling 3h under the speed of 300~350rpm adds sepiolite, zeolite, in 200~ Ball milling 2h, is eventually adding active carbon and bonding agent under the speed of 300rpm, and ball milling 1h, obtains under the speed of 100~120rpm Mixture A is added in mixture B mixture B, adds calcium hypochlorite, and after carrying out sonic oscillation mixing, mixed material is set In baking oven, 10~15min of freeze-day with constant temperature at a temperature of 65~75 DEG C obtains flocculant powder, protects in dry shady place sealing It deposits.
5. the commercial metal sewage water treatment method according to claim 4 based on flocfloatation precipitating, which is characterized in that The modified water hyacinth air bag fiber beam tube be using healthy water hyacinth plant as raw material, after pretreatment, be added 0.5%~ The modification conch meal of 1.0% weight ratio is uniformly mixed, obtains air bag fiber beam tube, take air bag fiber beam tube with etc. quality it is poly- Aluminium chloride ferrum mixing is closed, solid mixture is obtained, solid mixture is subjected to Far-infrared Heating to 70~75 DEG C, in heating process Stirring, while 1% chitosan acetic acid solution is sprayed into, the quality of chitosan is air bag fiber beam tube in the chitosan acetic acid solution The 0.05%~0.2% of quality continues to stir 5-10min after having sprayed, and obtains modified water hyacinth air bag fiber beam tube.
6. the commercial metal sewage water treatment method according to claim 5 based on flocfloatation precipitating, which is characterized in that The pretreatment be take balloon sites average diameter be 2.5cm~4.5cm water hyacinth healthy plant, cutting obtain air bag and The axis of 0.5~1cm, is dried in vacuo above and below air bag, and the dry moisture percentage to axis is 20%~30%, strips table Then layer is sheared the surface layer that removing obtains, 30 meshes are crossed.
7. the commercial metal sewage water treatment method according to claim 6 based on flocfloatation precipitating, which is characterized in that The modified conch meal is by shell through overpickling, after 700 DEG C of temperature lower calcinations, crushes to obtain modified shellfish through nano grinder Shell powder.
8. the commercial metal sewage water treatment method according to claim 7 based on flocfloatation precipitating, which is characterized in that The nano zine oxide/carbon quantum dot complexing agent is the preparation method is as follows: weigh barium stearate and unsaturated fatty acid is placed in instead It answers in kettle, after being heated to 25~35 DEG C, adds surfactant, deionized water, defoaming agent, in 60~80 DEG C, 500rpm item Disperse 20~30min under part, after being cooled to room temperature, nano-zinc oxide powder, deionized water, dispersing agent is added, heating water bath is extremely 25~30 DEG C, disperses 40~60min in 200~300rpm and obtain nano zinc oxide fluid dispersion, take carbon quantum dot solution that oxygen is added Change zinc dispersion liquid in, after being stirred, mixed liquor is placed in autoclave, under conditions of 80~100 DEG C react 3~ 5h after being cooled to room temperature, by product washing, centrifugation, drying, obtains nano zine oxide/carbon quantum dot complexing agent.
9. the commercial metal sewage water treatment method according to claim 8 based on flocfloatation precipitating, which is characterized in that The nano zine oxide spatially flower-like structure, and specific surface area is 1000~1200 ㎡/g.
10. the commercial metal sewage water treatment method according to claim 9 based on flocfloatation precipitating, feature exist In the mass ratio of the barium stearate and unsaturated fatty acid is 1:2.
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