CN101704602B - Physicochemical-microwave water treatment method - Google Patents
Physicochemical-microwave water treatment method Download PDFInfo
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- CN101704602B CN101704602B CN200910218277.0A CN200910218277A CN101704602B CN 101704602 B CN101704602 B CN 101704602B CN 200910218277 A CN200910218277 A CN 200910218277A CN 101704602 B CN101704602 B CN 101704602B
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Abstract
The invention provides a physicochemical-microwave water treatment method which comprises the steps of adding reagent in the water to be treated, adjusting the PH value to be 3-3.5, sending the water to a microwave field for treatment, adding CaO (Ca(OH)2) in the separated supernate after microwave treatment, adjusting the PH value to be more than 12, separating solid from liquid; adding reagent in the separated liquid, adjusting the PH value to be 6.8-7.4, finally separating out recycled regenerated water, recovering the solid of all the steps, and conducting concentration dewatering to the solid so as to be used as resource for other purposes, thus achieving the aim of water purification. The method integrates the advantages of dilute-phase selective energy supply of the microwave field to single-phase flow or multi-phase flow fluid, strong catalytic action of the microwave on physicochemical reaction of wave-absorption objects in the fluid, penetration action of the microwave on the fluid and the effect thereof of killing microbe, and the like, adds the reagent selectively by utilizing the properties of in-water pollutants in meta-acid, meta-alkalescence and neutral environments, and realizes water purification by microwave field catalysis and step-by-step separation. The method can purify polluted river and lake water into safe and green water for living, industry and agriculture, thus realizing sustainable utilization of water and reclamation of sewage as well as water recycling economy.
Description
Technical field
The present invention relates to a kind of water treatment method, relate in particular to a kind of physical chemistry water treatment method that utilizes micro-wave energy, belong to the environmental technology field of wastewater treatment and water purification.
Background technology
The society being developed so far in mankind's material civilization and cultural and ideological progress, the rare of Freshwater resources is but unprecedented, especially increase at population, under the impact of the human factor of pollution grows worse, and under the natural condition of climate change, the mankind will directly face larger fresh water crisis.There is research report to show in China: to expect the year two thousand thirty, town dweller will be increased to 1,340 hundred million tons from 31,000,000,000 tons of nineteen ninety-five to the demand of fresh water, simultaneously process water will be increased to 2,690 hundred million tons from 52,000,000,000 tons, and agricultural water will be increased to 6,650 hundred million tons from 4,000 hundred million tons.So big water consumption, has allowed people feel more pressure.If the mankind are not taken precautions against the limited water resources of only depositing, polluted rivers and lakes are not administered or administered ineffective, cause immeasurable destruction will to whole water ecological environment, bring serious " water shortage ", the existence that finally jeopardizes mankind itself.The Basic Ways that solves " water shortage " is exactly to realize the sustainable use of water, make sewage recycling, form the recycling economy of water, this is consistent with the strick precaution that rivers and lakes water is polluted, to fundamentally solve the pollution of rivers and lakes, matter of utmost importance is first to block source of pollution, and this to city still to vast rural area all without exception.Current present situation is: for alleviating and make up the deficiency of land Freshwater resources, coastal certain areas have spent a large amount of human and material resources to carry out sea water desaltination.This is not only the opposite way round that solves shortage of fresh water, and the harm that is difficult to the imagination by causing to marine ecology that desalinizes seawater in a large number, and mankind itself finally can make reprisals.In fact a large amount of waste water that the rivers and lakes water that, earth's surface, land is contaminated and human lives and activity in production produce itself is exactly Freshwater resources.How polluted rivers and lakes water and town sewage and industrial sewage are converted into safe green water life, industry, agricultural, realizing the sustainable use of water and the recycling economy of sewage recycling and water, is the fundamental way that solves mankind's shortage of fresh water.
The treatment process of existing industrialization waste water exists following main drawback:
1. town sewage processing
Existing urban wastewater treatment firm almost adopts " biological chemistry " method of introducing without any exception, its essence is to utilize the amount reproduction of microorganism under certain environment condition, makes the pollution substances such as reductibility in sewage produce lentamente degraded chemical reaction and be removed.This method can only make water quality after treatment reach the emission standard of national regulation and be discharged.If make water after treatment be converted into reclaimed water reuse, must carry out again advanced treatment according to the specification of quality of reuse water.Current advanced treatment one is somewhat expensive, the 2nd, and treatment technology is limited, and difficulty is given and is realized high-quality, efficient, economic reclaimed water reuse.
2. Industrial Wastewater Treatment
Trade effluent is of a great variety, and the method for processing is also because the composition of its pollutent is different different.The processing of the trade effluent to some high Organic pollutants, the normal multiple-stage treatment that needs " physico-chemical processes " and " biochemical process "; To the processing of other trade effluents, also do not find the economically viable effective technology that makes water quality reaching standard discharge after treatment, as for allowing product effluent quality after treatment reach the technico-economical comparison of reclaimed water reuse, be difficult to.
3. the processing of contaminated rivers and lakes water
Contaminated rivers and lakes water is converted into safe green water life, industry, agricultural, is the only way of alleviating and overcome land Freshwater resources worsening shortages.But existing centralized tap water, for water treatment technology, can only be converted into Drinking Water satisfactory earth surface water source.If will be converted into living safety water to those contaminated rivers and lakes water, use existing water technology, be uneconomic or helpless.
The patent No. by the applicant's earlier application is: a kind of " method of microwave treatment waste water " of ZL99115141.0, town sewage, trade effluent are effectively processed, through continuous production practice for many years, there are again new understanding and new breakthrough, in constantly in-depth understanding, develop again and formed more perfect, ripe water technology.
Summary of the invention
The object of the present invention is to provide a kind of materialization treatment process that integrates microwave field eight large distinct advantages, be to process contaminated rivers and lakes water, sanitary sewage, trade effluent, make it to be converted into the method for life, industry, the green water of agricultural safety.
The present invention completes by following technical proposal: one materialization---and the method for Microwave Water processing, comprising:
A, in pending water, add medicament, so that the material of the physical reaction that participates in water pollutant degraded to be provided;
B, water after above-mentioned and medicament are mixed are sent in microwave field and are processed, under the strong katalysis of microwave field, pollutent in water carries out physical reaction with the medicament adding, generation gas, solid separate with water, and activate contaminant molecule, the hydrocarbon key of cracking polymer organic pollutant, for subsequent disposal creates conditions, gaseous emission afterwards, separate solid and liquid;
It is characterized in that:
C, after microwave treatment, in isolated liquid, add C
ao[C
a(OH)
2] to the PH > 12 of this liquid, separate solid and liquid;
D, in above-mentioned C step process isolated liquid, adding medicament is 6.8～7.4 to this liquid pH value, separate solid and liquid;
E, be the reuse water of final output through above-mentioned D step process isolated liquid, merge B, C, tri-isolated solids of step of D, after thickening, separately use as resource.
The medicament add-on of described A step is: adding medicament to pending water ph value is 3～3.5; The medicament adding is respectively F
esO
4, F
ecI
3, H
2o
2, wherein F
esO
4, F
ecI
3mixing adds, and its mixing quality ratio is: F
esO
4: F
ecI
3=1000: 1～3; H
2o
2to add be by F
esO
4: H
2o
2=6.7: 1～1.5 mass ratio adds.
The medicament adding in described D step is: F
e2(SO
4)
3.XH
2o, F
ecI
3, AI
2(SO
4)
3.XH
2the mixture of O, wherein: F
e2(SO
4)
3.XH
2o: F
ecI
3: AI
2(SO
4)
3.XH
2the mass ratio of O=20～22: 0.3～0.8: 0.8-1.2.
Adding under whipped state of described medicament carried out, and makes medicament fully and processed water mixes.
Described solid carries out with separating in three-phase flow separate tank of liquid and gas, and solid, liquid, gas body continuous separate is from, continuously output clear water and solid (mud).
In described B step, the journey time that enters the water in microwave field is 10～20 seconds, and Microwave Power Density is 0.016～0.019KVA/m
3water.
Water treatment mechanism of the present invention is as follows: this water technology is that microwave field and adding medicine are indispensable.Adding medicine solves the thermodynamic problems that the pollutent in water is degraded rapidly in microwave field; Microwave field solves the pollutent reaction kinetics problem of degraded rapidly in water, utilizes the strong katalysis of microwave field that is:, accelerates pollutent in water and the medicament adding and is converted into separating of solid indissoluble thing, gas, water.Specifically:
One, the mechanism of Microwave Water processing
(1) Microwave Water processing reaction dynamical foundation
(a) take waste water conventional processing engineering batch reactor as example, in system lock, in the situation that between the reaction period, system passes in and out without material, the starting point concentration C of reactant when waste water input
0the concentration C of output-response thing after treatment and the relation of reaction times t, through deriving, its mathematic(al) representation is:
In formula (1), k is reaction rate constant
For its C of certain waste water
0for fixed number, C is for equaling and allowing emission standard lower than national regulation, therefore
also can be considered fixed number; Now will shorten treatment time t, its approach is to improve k value, the method for traditional raising k value: the one, select efficient reagent; The 2nd, stir.Adopt the method for materialization, stirring is to reactive system energy supply; Utilize microwave distinct advantages to the energy supply of pollutent selectivity in reactive system, greatly improve reaction rate constant k, inevitable Reaction time shorten t greatly reduces C simultaneously, raises the efficiency
(b) realize the processed continuously dynamical foundation of waste water microwave field (energy)
Conventional processing waste water engineering, for realizing continuous processing, and guarantees treatment effect, saves the residence time of wastewater treatment process in single reactor, adopts tandem Batchwise reactor in design, and through deriving, its mathematic(al) representation is:
In formula (2), θ is the time that waste liquid stops in reactor; K is reaction rate constant; C
0for the reactant concn of waste water input; C
nthe reactant concn of the outlet ending for the reaction of n reactors in series; N is the number of the reactor of series connection.
Can be found out by formula (2), at exit concentration C
nunder given prerequisite, for same waste water its
value is a fixed number, and the number n value of reactor of series connection is larger like this, the time of waste water required stop in each reactor just shorter, waste water conventional processing that Here it is is designed to the huge reason place of what floor space; In addition, in in-line Continuous Flow stirred reactor, because the reactant mean concns of each reactor is higher than the concentration of single reaction vessel, thereby the average response speed of each reactor is greater than the concentration of single reactor, thereby each required reaction times correspondingly reduce, therefore total volume and waste water total residence time in treating processes of reactor is also less than single reactor.The number n of augmenting response device, is the number n that increases agitator, and essence is to increase energy supply, improves the mass transfer velocity of physical reaction, finally makes speed of reaction k value improve, and saves reaction times θ.
Utilize micro-wave energy to process waste water, utilize the distinct advantages of microwave selective energy supply, effect and the penetration of accelerating mass transfer velocity in the process of catalysis, are also comprised, become mechanical energy supply into microwave energy supply, so just make a microwave treatment specific equipment substitute some multiple series connection Continuous Flow stirred reactors.And micro-wave energy is processed waste water and is also had germicidal action.K and n in formula (2) are now the functions of Microwave Power Density, and be a reaction rate constant more much bigger than conventional processing method, and the physical significance of n is no longer the number of reactor, but a positive number directly related with microwave input power density.Therefore formula (2) still can be used as the mathematic(al) representation of microwave treatment.
(c) chemical reaction between material molecule its essence is the transfer process of core dispatch from foreign news agency, and the transfer of electronics must just can complete under certain energy level.The core outermost electron of inhaling ripple material in microwave field is accepted after micro-wave energy by transitting to excited state track on normality track, for shifting, extranuclear electron provides condition and energy, and reducing substances (principal pollutant) in water in microwave field almost without exception by microwave selective energy supply, Here it is microwave is to inhaling the catalysis of ripple material chemical reaction.
(d) some polymer organic pollutant in water, adopt routine techniques processing to be difficult to give degraded, when detection, even use the detection method of conventional chemical oxygen demand (COD) all to examine and do not measure, in molecular structure because of these materials in microwave field, contain carbon, hydrogen, nitrogen, carbon wherein, hydrogen shows as violent suction ripple in microwave field, under the effect of microwave field ultra-high frequency electromagnetic field, these polymer organic pollutants show as scission reaction, ring-type, the molecular chain of chain is interrupted, macromolecular cleavage is small molecules, what have even directly separates out carbon granules, thereby these organic pollutants are degraded in subsequent processes, what microwave field play a part is to substitute autoclave.
(e) the microfine indissoluble thing that the microfine indissoluble thing that chemical reaction produces under microwave field katalysis of the pollutent in processed water and high dispersing suspend in water; under the effect of microwave electromagnetic field; converge and be macrobead precipitation by microfine very soon, thereby be easy to separate with water.
(2) physical reaction of Microwave Water processing
The task of water treatment is to adopt means physics, chemistry that pollutent is wherein converted into indissoluble solids, gas and water, finally separates with water, thereby removes water pollutant.And pollutent in water system is divided into: organic pollutant and the large class of inorganic pollutant two.These pollutents are divided into again the indissoluble thing under sour environment, the indissoluble thing under alkaline environment and the indissoluble thing under neutral environment, and the lyotrope that can dissolve each other with water under acid, alkalescence, neutral environment.For eliminating the pollutent in water, traditional " biochemical process " is to utilize microorganism suitably under envrionment conditions, constantly breeding, under the effect of microorganism, make the pollutent (being mainly reducing substances) in water produce lentamente chemical reaction, thereby make contaminant degradation.But this method is like water off a duck's back to the degraded of the pollutent in some waste water.Therefore, just there is the processing method that also will pressurize, heat when dosing is stirred, only in this way just can make some contaminant degradation eliminate, Here it is traditional " physico-chemical processes ".
Microwave Water processing is the afore-mentioned characteristics of utilizing the pollutent in water, make pollutent under the katalysis of microwave field with the contaminant molecule that the ultra-high frequency electromagnetic field of microwave activates in water, after neutralizing out microwave field, microwave field completes rapidly physical reaction with the medicament adding, microwave field is by hydrocarbon the polymer organic pollutant molecule of conventional sewage treatment difficult degradation bond cleavage solution, for subsequent disposal creates conditions simultaneously.
Two, add the physical reaction mechanism after medicament
(1) the physical reaction mechanism that adds medicament to enter microwave field to form sour environment in pending
The medicament adding is F
esO
4, F
ecI
3, H
2o
2combine according to a certain percentage F
e 2+, F
e 3+, SO
4 2-violent ripple (energy), the H of inhaling in microwave field
2o
2absorb micro-wave energy in microwave field after, decompose CI
-in the situation that having atomic oxygen to exist, ratio uses separately CI
2there is stronger oxidisability, therefore this combination medicament add after to enter microwave field forward and backward, produce following leading ion reaction:
F
e 2++H
2O
2→F
e 3++OH+OH
-
F
e 2++OH→F
e 3++OH
-
F
e 3++H
2O
2→F
e 2++H
2O+H
+
HO
2+H
2O
2→O
2+H
2O+OH
RH+OH→CO
2+H
2O
4F
e 2++O
2+4H
+→4F
e 3++H
2O
F
e 3++ OH
-→ F
e(OH)
3(colloid)
F
e 2+with H
2o
2between reaction in microwave field, be exceedingly fast, OH, the OH of generation
-and atomic oxygen and chlorion have superpower oxidation capacity in microwave field, oxidable reducing substances under slant acidity environment is almost had no to the oxidation of selecting.Microwave field, by the hydrocarbon bond cleavage solution of polymer organic pollutant molecule, makes carbon and the hydrogen of the reducing substanceses such as the organism RH in processed water finally be converted into CO, CO in addition
2, H
2o, C and carbonate etc. and separate with water.When town sewage processing with the present invention, through the actual measurement to the air water separator vapor pipe Exhaust Gas in load running, in Exhaust Gas, there are CO, CO
2, NO
x, H
2s, hydrocarbonylation thing, methane etc. (in table 6), the reducing substanceses such as the organic pollutant in this explanation processed water produce violent DeR in microwave field.Meanwhile, because the medicament adding in advance makes PH=3～3.5 of fluid, and there is F
e 3+deng existence, microfine solid particulate is had to throwing out, add that microwave field is to the strong effect of converging of microfine suspended solid, not only can greatly reduce the chemical oxygen demand (COD) in processed water, and can eliminate the indissoluble suspended solid under sour environment, indissoluble solid sediment under sour environment, is mainly the materials such as COD, colourity, foam and stink in pollutent, and therefore this process is the process of decolouring, froth breaking, deodorizing.Activate under this sour environment condition the still molecule of undegradable reducing substances by microwave field, the hydrocarbon key of cracking macromolecule organic simultaneously, for the degraded of follow-up alkalescence and neutral environment treating processes creates conditions simultaneously.
(2) after microwave treatment, add medicament to form the physical reaction mechanism of alkaline environment
Fluid under sour environment goes out after microwave field through microwave field processing, removes the indissoluble solids under sour environment, continues to add C in pending water
ao[C
a(OH)
2], making the PH > 12 of this water, the effect of processing like this has three: the first keeps the OH in processed water
-there is sufficiently high concentration, make reducing substances not oxidized under sour environment but that activated by microwave field, and hydrocarbon key by micro-wave energy cracking macromolecular organic compound etc., can under alkaline environment, be oxidized OH
-those oxidized reducing substanceses of ability under alkaline environment are there is to the oxygenizement of non-selectivity; Its two, under alkaline environment, produce the degraded chemical reaction of following ammonia nitrogen and phosphorus:
Mg
2++NH
4 ++PO
4 3-+6H
2O-→MgNH
4PO
4.6H
2O↓
C
a 2++NH
4 ++PO
4 3-+6H
2O-→C
aNH
4PO
4.6H
2O↓
MgNH
4pO
4.6H
2o and C
anH
4pO
4.6H
2solubility product≤2.5X10 of O
-13;
Its three, due to toxic metal ions such as the heavy metals in pollutent, the throw out that must just can be converted into indissoluble under the alkaline environment of PH>=11 separates with water, therefore, in pending water, adds C
ao[C
a(OH)
2], and make the PH > 12 of this water, and the present invention is except the method for the metallic salts such as the heavy metal in decontaminated water just, and its ionic reaction of removing metal (M) ion and acid group is expressed general formula and is:
XM
n++OH
-→M
xO
n↓+xn H
2O
C
a 2++SO
4 2-→C
aSO
4↓
…………………
H
++OH
-→H
2O
(3) add medicament finally to form the physical reaction mechanism of neutral environment
After alkaline environment is processed, not yet remove in the pending water of pollutent, continue to add by a certain percentage F
e2(SO
4)
3.XH
2o, F
ecI
3, AI
2(SO
4)
3.XH
2the confections such as O, make the pH value of water be adjusted to 6.8～7.4.For reducing F in confection
e2(SO
4)
3.XH
2o, F
ecI
3, AI
2(SO
4)
3.XH
2the consumptions such as O, at every m
3volume ratio by 0.3～0.5% in saturated liquid medicine is allocated into containing H
2sO
4it is 98% the vitriol oil.Its effect has three:
One, for being neutral water by alkaline water neutralization, its ionic reaction formula is:
OH
-+H
+→H
2O；
Its two, make the dissolved solids under alkaline environment, under neutral environment, be finally converted into solids indissoluble and precipitate, and F in the medicament adding
e 3+and AI
3+strong throwing out under, the microfine solid of suspension is converged and is separated with water into macrobead sediment;
Its three, utilize FeCI
3strong oxidizing property, make under acid and alkaline environment still reducing substances not oxidized but that activated by microwave field, finally oxidized, precipitate and separate with water.
Sewage physicochemical microwave treatment method provided by the invention, the dilute phase selectivity energy supply of collection microwave field to single-phase flow or polyphasic flow fluid; In microwave convection body, inhale the strong katalysis that the physical reaction of ripple material has; The eight large distinct advantages such as the penetration of microwave convection body and effect of killing microorganisms thereof are integrated.Compare with traditional wastewater facture, it is low that microwave sewage facture has unit sewage disposal investment intensity, floor space is little, sewage treatment project can be greatly also can small-sized decentralized (block and pollute source), sewage treatment process is short, in sewage, contaminant degradation physical reaction is rapid, unit sewage disposal comprehensive energy consumption is low, unit sewage disposal working cost is low, in sewage, pollutant removal is thorough, sewage disposal process is not subject to the impact of envrionment temperature and raw waste water Pollutant levels, can be as required in sewage treatment process random start-stop, realize the sustainable use of water and make sewage recycling and the recycling economy of water, mud does not produce secondary pollution and can be used as Regression of Resources the Nature environment, kill pathogenic agent in sewage, contaminated rivers pond Lake Water is converted into life, industry, the advantages such as the safe green water of agricultural.Therefore, sewage microwave treatment method, by for eliminate the pollution of bringing into rivers and lakes because of the mankind's life and activity in production from source, makes human lives step into water surrounding benign cycle, and worldwide " water shortage " that solves facing mankind is contributed.
Accompanying drawing explanation
Fig. 1 is the present invention's process flow sheet.
Embodiment
Below in conjunction with embodiment, the present invention is described further.
Embodiment 1
Provided by the invention by materialization---the method for Microwave Water processing, process following process steps:
A, former pending town sewage water is flowed in the agitated pool that we opens through header tank, adding following medicament to pH value is 3:F
esO
4, F
ecI
3, H
2o
2, wherein F
esO
4, F
ecI
3mixing adds, and its mixing quality ratio is: F
esO
4: F
ecI
3=1000: 1; H
2o
2to add be by F
esO
4: H
2o
2=6.7: 1 mass ratio adds, and stirring and evenly mixing simultaneously, makes medicament completely and water mixes, and obtains slant acidity mixed solution;
B, the acid mixed solution of above-mentioned A step is sent in industrial microwave oven specially for fluid treatment of the prior art and carries out microwave treatment, the journey time of mixed solution in microwave field is 10 seconds, and Microwave Power Density is 0.19KVA/m
3water;
C, the mixed solution after above-mentioned B step microwave treatment is sent in three-phase flow separate tank, carried out solid, liquid, gas separation, gaseous emission, isolates solid and liquid;
In D, agitated pool two that the liquid flooding separating through above-mentioned C step is opened to us, add C
ao[C
a(OH)
2] to the pH value > 12 of this liquid, and stir, alkaline liquid obtained;
E, the alkaline liquid of above-mentioned D step is sent in transition pond, coarse particles solid sinks to bottom, transition pond and discharges, and supernatant liquid overflow enters agitated pool three;
F, the supernatant liquid of above-mentioned E step is overflowed in agitated pool three, adding following medicament to pH value is 6.8, F
e2(SO
4)
3.XH
2o: F
ecI
3: AI
2(SO
4)
3.XH
2o=20: the mass ratio of 0.3: 0.8, simultaneously stirring and evenly mixing;
G, the neutral liquid of above-mentioned F step is overflowed to final deposition pool, carry out solid-liquid continuous separate and be interrupted and discharge from, bottom sludge, top overflow clear water is final reuse water;
The solid sediment that H, collection C step, E step and G step are discharged, after conventional means concentrates, dewaters, obtains solids, and the nontoxic odorless of this solids, can be used as renewable resource utilization.
The Monitoring Indexes that the former water of town sewage is carried out before and after treatment the results are shown in Table 1.
Embodiment 2
Provided by the invention by materialization---the method for microwave treatment water, process following process steps:
A, the intermediate water of output after urban wastewater treatment firm is processed is flowed in the agitated pool that we opens through header tank, adding following medicament to pH value is 3.5:F
esO
4, F
ecI
3, H
2o
2, wherein F
esO
4, F
ecI
3mixing adds, and its mixing quality ratio is: F
esO
4: F
ecI
3=1000: 3; H
2o
2to add be by F
esO
4: H
2o
2=6.7: 1.5 mass ratio adds, and stirring and evenly mixing simultaneously, makes medicament completely and water mixes, and obtains acid mixed solution;
B, the acid mixed solution of above-mentioned A step is sent in industrial microwave oven specially for fluid treatment of the prior art and carries out microwave treatment, the journey time of fluid in microwave field is 20 seconds, and Microwave Power Density is 0.016KVA/m
3water;
C, the liquid after above-mentioned B step microwave treatment is sent into and in three-phase flow separate tank, carried out solid, liquid, gas separation, at the bottom of pond, mud is interrupted and discharges, and supernatant liquid continuous overflow flows out, and the gas thereupon producing is emptying;
In D, agitated pool two that the supernatant liquid overflow of above-mentioned C step is opened to us, add C
ao[C
a(OH)
2] to the pH value > 12 of this overflow, and stir, alkaline fluids obtained;
E, the alkaline fluids of above-mentioned D step is sent in transition pond, coarse particles solid sinks to bottom, transition pond and discharges, and supernatant liquor overflow is flowed out;
F, the supernatant liquor of above-mentioned E step is overflowed in agitated pool three, adding following medicament to pH value is 7.4, F
e2(SO
4)
3.XH
2o: F
ecI
3: AI
2(SO
4)
3.XH
2o=22: the mass ratio of 0.8: 1.2, stirring and evenly mixing, obtains neutral fluid simultaneously;
G, send final deposition pool to carry out solid, liquid separation the neutral liquid of above-mentioned F step, solid is regularly discharged at the bottom of sinking to pond, supernatant liquor overflow, be can reuse clear water;
The solid sediment that H, collection C step, E step and G step are discharged, after conventional means concentrates, dewaters, obtains solids, and this nontoxic odorless mud can be made renewable resource utilization.
The intermediate water of output after urban wastewater treatment firm is processed be the results are shown in Table to 2 through the present invention's Monitoring Indexes before and after treatment.
Embodiment 3
Provided by the invention by materialization---the method for Microwave Water processing, process following process steps:
A, the sludge water of output after urban wastewater treatment firm is processed is flowed in the agitated pool that we opens through header tank, adding following medicament to pH value is 3.5:F
esO
4, F
ecI
3, H
2o
2, wherein F
esO
4, F
ecI
3mixing adds, and its mixing quality ratio is: F
esO
4: F
ecI
3=1000: 2; H
2o
2to add be by F
esO
4: H
2o
2=6.7: 1.3 mass ratio adds, and stirring and evenly mixing, obtains acid mixed solution simultaneously;
B, the acid mixed solution of above-mentioned A step is sent in industrial microwave oven specially for fluid treatment of the prior art and carries out microwave treatment, the journey time of fluid in microwave field is 15 minutes, and Microwave Power Density is 0.17KVA/m
3water;
C, the fluid after above-mentioned B step microwave treatment is sent in three-phase flow separate tank, carried out solid, liquid, gas separation, solid sinks to separate tank bottom and discharges, and supernatant liquor flows out, and the gas thereupon producing is emptying;
In D, agitated pool two that the supernatant liquor overflow of above-mentioned C step is opened to us, add C
ao[C
a(OH)
2] to the pH value > 12 of this overflow, and stir, alkaline fluids obtained;
E, the alkaline fluids of above-mentioned D step is sent in transition pond, coarse particles solid sinks to bottom, transition pond and discharges, and supernatant liquor overflows;
F, the supernatant liquor of above-mentioned E step is overflowed in agitated pool three, adding following medicament to pH value is 7:F
e2(SO
4)
3.XH
2o: F
ecI
3: AI
2(SO
4)
3.XH
2o=21: the mass ratio of 0.5: 1, stirring and evenly mixing, obtains neutral fluid simultaneously;
G, send final deposition pool by the neutral fluid of above-mentioned F step, carry out solid, liquid separation, solid sinks to bottom, pond and discharges, supernatant liquor overflow, be can reuse clear water;
The solid sediment that H, collection C step, E step and G step are discharged, after conventional means concentrates, dewaters, obtains solids, and this nontoxic odorless solids can be made renewable resource utilization.
By the sludge water of output after urban wastewater treatment firm is processed through the present invention's index detected result before and after treatment in table 3.
Above-described embodiment industrial microwave oven used is the maturation equipment that the applicant's the formerly patent No. is ZL99114774.X; Agitated pool used, separate tank, transition pond, final deposition pool are conventional general-purpose equipment.
After the present invention processes, institute's nontoxic odorless of the mud that produces, and examines under a microscope, and after microwave field, the mud of output is to justify a fine-grannular entirely, good fluidity, very easily dewaters.Mud odorless, illustrates that wherein most microorganisms are killed.The intestinal bacteria population number detected result of town sewage water inlet is >=24000/ml, and microwave treatment output clear water intestinal bacteria population number detected result is 20/ml of <,, also illustrate that bacterium killed by major part.
Town sewage is shown in (table 4) through the mud detected result of microwave treatment output.
Table 1 town sewage is processed front former water and is processed the monitoring result of rear output clear water
| Pollutent | PH | COD cr | BOD 5 | Suspended substance | Total nitrogen | Total phosphorus | Petroleum-type | Excrement colibacillus group |
| 1# water inlet sample (mg/L) | 7.82 | 494 | 121 | 884 | 35.03 | 7.25 | 1.47 | 24000/ml of > |
| 1# goes out water sample (mg/L) | 8.59 | 9 | ＜2.0 | ＜4.0 | 8.94 | 0.032 | ＜0.050 | 20/ml of < |
| 2# water inlet sample (mg/L) | 7.89 | 199 | 94.61 | 315 | 21.82 | 3.76 | 1.14 | 24000/ml of > |
| 2# goes out water sample (mg/L) | 8.68 | 8 | ＜2.0 | ＜4.0 | 9.67 | 0.052 | 0.124 | 20/ml of < |
Table 2 town sewage is processed the monitoring result of front and rear in the present invention through the intermediate water of sewage work's processing output
| Pollutent | PH | COD cr | BOD 5 | Suspended substance | Ammonia nitrogen | Total phosphorus | Petroleum-type | Excrement colibacillus group |
| Intermediate water 1# water inlet sample (mg/L) | 8.07 | 27 | 11 | 14.0 | 1.83 | 0.904 | 1.128 | 24000/ml of > |
| 1# goes out water sample (mg/L) | 7.73 | ＜3 | ＜2.0 | ＜4.0 | 1.4 | ＜0.01 | 0.034 | 20/ml of < |
| Intermediate water 2# water inlet sample (mg/L) | 8.11 | 109 | 19.7 | ＜4.0 | 1.21 | 0.295 | 0.164 | 24000/ml of > |
| 2# goes out water sample (mg/L) | 7.75 | ＜3 | ＜2.0 | ＜4.0 | 0.84 | ＜0.01 | 0.044 | 20/ml of < |
Table 3 by the sludge water in the town sewage of sewage work's output through the present invention's index detected result before and after treatment
Table 4 town sewage microwave treatment output mud Leaching monitoring result (mg/L)
Same treatment step is applied to trade effluent and the water inlet of polluted rivers and lakes water and output water test section and the results are shown in table 7,8,9,10,11.
Table 6F-WB-2 type waste water microwave treatment systems is processed municipal wastewater microwave field and is discharged exhaust pollutant composition monitoring result
Table 6 monitoring result shows, dirty water pollutant, under microwave catalysis effect, produces violent DeR.Monitoring numerical value shows, discharges tail gas pollution substrate concentration and does not form the pollution to atmospheric environment.
Water quality detection index before and after table 7 dyeing waste water microwave treatment
Table 8 Xylitol factory effluent is sneaked into town sewage dosing and is entered microwave field processing front and back water quality detection index
Table 9 town sewage and cyanide electroplating waste water are sneaked into town sewage dosing and are entered microwave field front and back water quality detection index
* table 9 detected result is taken back location for user's sampling and is detected returned data.
Water quality Yunnan Province environmental monitoring junction centre detected result before and after certain mine domestic water of table 10 and certain river river in rainy season microwave treatment
Table 11 interwined dragon river, Dianchi Lake, West Garden tunnel, mantis river water microwave treatment front and rear portions are divided detection index
Claims (3)
1. materialization a---microwave water treatment method, is characterized in that through the following step:
A, in pending water, add medicament to pending water pH value be 3～3.5, pending water and medicament are mixed, medicament is respectively following medicament: FeSO
4, FeCl
3, H
2o
2, wherein FeSO
4, FeCl
3mixing adds, and its mass mixing ratio is: FeSO
4: FeCl
3=1000: 1～3; H
2o
2to add be by FeSO
4: H
2o
2=6.7: 1～1.5 mass ratio adds;
After B, water after above-mentioned and medicament are mixed are sent into and are processed in microwave field, separate solid and liquid; The journey time that enters the water in microwave field is 10～20 seconds, and Microwave Power Density is 0.016～0.019KVA/m
3water;
C, after the microwave treatment of step B, in isolated liquid, add CaO[Ca (OH)
2] to the pH > 12 of this liquid, separate solid and liquid;
D, through above-mentioned steps C process and isolated liquid in, adding medicament is 6.8～7.4 to this liquid pH value, separate solid and liquid; The medicament adding is Fe
2(SO
4)
3.XH
2o, FeCl
3, Al
2(SO
4)
3.XH
2the mixture of O, wherein: Fe
2(SO
4)
3.XH
2o: FeCl
3: Al
2(SO
4)
3.XH
2the mass ratio of O=20～22: 0.3～0.8: 0.8-1.2;
E, be reuse reuse water through D step process isolated liquid, merge B, C, tri-isolated solids of step of D, after thickening, separately use as resource.
2. materialization as claimed in claim 1---microwave water treatment method, is characterized in that carrying out adding under whipped state of described medicament, and medicament and processed water are fully mixed.
3. materialization as claimed in claim 1---microwave water treatment method, is characterized in that described solid carries out with separating in three-phase flow separate tank of liquid and gas, i.e. solid, liquid, gas separation is complete, and water has also just purified.
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| CN101391847A (en) * | 2008-09-27 | 2009-03-25 | 昆明钢铁集团有限责任公司 | Method for treating tailing water from mineral processing plant by microwave |
| CN101439913A (en) * | 2008-09-26 | 2009-05-27 | 厦门市威士邦膜科技有限公司 | Process for processing refractory organic wastewater |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2871509Y (en) * | 2006-01-16 | 2007-02-21 | 章继武 | Pulsed microwave water treater |
| CN101439913A (en) * | 2008-09-26 | 2009-05-27 | 厦门市威士邦膜科技有限公司 | Process for processing refractory organic wastewater |
| CN101391847A (en) * | 2008-09-27 | 2009-03-25 | 昆明钢铁集团有限责任公司 | Method for treating tailing water from mineral processing plant by microwave |
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