CN109250840A - A method of black and odorous water is handled using potassium ferrate and activated carbon combined enhanced coagulation - Google Patents
A method of black and odorous water is handled using potassium ferrate and activated carbon combined enhanced coagulation Download PDFInfo
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- CN109250840A CN109250840A CN201811159353.0A CN201811159353A CN109250840A CN 109250840 A CN109250840 A CN 109250840A CN 201811159353 A CN201811159353 A CN 201811159353A CN 109250840 A CN109250840 A CN 109250840A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/02—Odour removal or prevention of malodour
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
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- Environmental & Geological Engineering (AREA)
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Abstract
The invention discloses a kind of methods using potassium ferrate and activated carbon combined enhanced coagulation processing black and odorous water, including potassium ferrate and aluminium polychloride stirring are added into black and odorous water, active carbon is added, after adjusting pH value 5~10, is stirred to react, staticly settles；Method of the invention can not only effectively adsorb dissolved organic matter in black and odorous water, improve the settling property of water wadding body, effectively remove each pollutant, COD (COD), ammonia nitrogen (NH3- N) and turbidity removal effect it is obvious, strong operability is at low cost.
Description
Technical field
The invention belongs to black and odorous water process fields more particularly to a kind of use potassium ferrate and activated carbon combined strengthen to mix
The method of solidifying processing black and odorous water.
Background technique
With the fast development of economic society, water environment is faced with the multi-party surface pressure such as water pollution, shortage of water resources.
Black and odorous water is current influence production and living water environmental problems more outstanding, and country is just actively pushing forward black and odorous water improvement.State
" the water prevention and cure of pollution action plan " that institute promulgates of being engaged in proposes " to arrive the year two thousand twenty, ground level and the above completed region of the city black and odorous water are controlled
System within 10%, to the year two thousand thirty, completed region of the city black and odorous water is totally eliminated " controlling target.The smelly water of urban black
Body regulation, which has become local people's governments at all levels, improves the important content of living environment's work.
A kind of water process of the coagulation technology as method for treating water for being widely used, being simple and efficient, applied to various water quality
In technique, key effect is played in the purification of black and odorous water.Divide currently, coagulant and flocculation aid occupy water treatment agent total amount four
Three, the superiority and inferiority of performance largely determines the quality and cost of final outflow water[1].Therefore new and effective mixed
It coagulates the research and development of agent and applies and occupied an important position in the development of water process new and high technology.
Potassium ferrate (K2FeO4) as a kind of pre-oxidation agent for enhanced coagulation, compared with potassium ferrate, chlorine, chlorine dioxide,
The common oxidant such as ozone has incomparable advantage.The intermediate product of potassium ferrate oxidation will increase the coloration of water body, make
At secondary pollution；Oxychloride is also easy to produce " three cause " organic chloride；Chlorine dioxide, ozone application are at high cost in enhanced coagulation, behaviour
It is big to make difficulty.K2FeO4In FeO4 2-In the form of Fe (VI) exist, have stronger oxidisability, can aoxidize in water it is a variety of it is inorganic and
Organic pollutant, FeO4 2-It is reduced the Fe (OH) of generation simultaneously3Colloid has flocculation and suction-operated, and pilot process does not produce
Raw any secondary pollution is a kind of new and effective, safety, multifunction green water treatment agent, have oxidation, sterilization, flocculation,
Help solidifying, absorption, except multiple functions such as algaes.
Domestic and foreign scholars are for K2FeO4The research of water treatment efficiency be concentrated mainly on exclusive use (Khemarath
OsathapHan, 2011；Sharma V K etc., 2008；Seung-Mok L etc., 2009), (Saskia G is combined with ozone
Zimmermann etc., 2012；Expect in week, 2013；Feng Jie etc., 2015), with photocatalysis combination (Winkelmann K etc., 2008；
Ba Yier is sensible etc., 2013), with modified coal ash combination (He Wenli etc., 2010；Yuan Zhihua etc., 2010).In enhanced coagulation side
Face, Cheng Shuan, Wang Qun, Li Yafeng etc. utilize K2FeO4K is had studied with aluminium salt combination2FeO4Enhanced coagulation effect etc..
Summary of the invention
Goal of the invention: it is black using potassium ferrate and the processing of activated carbon combined enhanced coagulation that the object of the present invention is to provide a kind of
The method of smelly water body, this method can either effectively adsorb dissolved organic matter in black and odorous water can improve the sedimentation of water wadding body again
Performance, and effectively remove each pollutant.
Technical solution: method of the present invention using potassium ferrate and activated carbon combined enhanced coagulation processing black and odorous water, packet
Include following steps: potassium ferrate and aluminium polychloride stirring being added into black and odorous water, adds active carbon, adjust pH value 5~
It after 10, is stirred to react, staticly settles；Wherein, the mass volume ratio of the potassium ferrate and black and odorous water is 0.8~1.2:
1, the mass volume ratio of aluminium polychloride and black and odorous water is 10~50:1, and the mass volume ratio of active carbon and black and odorous water is 10
~20:1.
Furtherly, potassium ferrate is added into black and odorous water and aluminium polychloride is that potassium ferrate pre-oxidation is first added instead
Aluminium polychloride is added after answering 5~15min.Preferably, 10~15min is pre-oxidized.
It further says, is stirred to react and first stirs 1~3min under the conditions of 250~350r/min, then in 100~200r/
2~4min is stirred under the conditions of min, then 3~8min is stirred under the conditions of 10~100r/min.
It further says, the mass volume ratio of potassium ferrate and black and odorous water can be 1~1.2:1.Aluminium polychloride with it is black
The mass volume ratio of smelly water body can be 30~50:1.The mass volume ratio of active carbon and black and odorous water can be 16~20:1.PH value
It can be 7~10.Staticly settling can be 15~25min.
The utility model has the advantages that compared with prior art, remarkable advantage of the invention are as follows: using potassium ferrate and activated carbon combined strong
The method for changing coagulating treatment black and odorous water can not only effectively adsorb dissolved organic matter in black and odorous water, improve water wadding body
Settling property effectively removes each pollutant, COD (COD), ammonia nitrogen (NH3- N) and turbidity removal effect it is obvious, and can
Strong operability, it is at low cost.
Detailed description of the invention
Fig. 1 be potassium ferrate different preoxidation times with potassium ferrate difference additional amount reciprocation to NH3- N removal
The effect picture of rate；
Fig. 2 is the active carbon of different additional amounts and the reciprocation of potassium ferrate to NH3The effect picture of-N removal rate；
Fig. 3 is the reciprocation of different pH value and potassium ferrate difference additional amount to NH3The effect picture of-N removal rate；
Fig. 4 is the reciprocation of the different preoxidation times of different activities charcoal dosage and potassium ferrate to NH3- N removal
The effect picture of rate；
Fig. 5 is the reciprocation of the different preoxidation times of different pH value and potassium ferrate to NH3The effect of-N removal rate
Figure；
Fig. 6 is the reciprocation of the different additional amounts of different pH value and active carbon to NH3The effect picture of-N removal rate；
Fig. 7 be potassium ferrate different preoxidation times with potassium ferrate difference additional amount reciprocation to COD removal rate
Effect picture；
Fig. 8 be different additional amounts active carbon and potassium ferrate reciprocation to the effect picture of COD removal rate；
Fig. 9 is effect picture of the reciprocation to COD removal rate of different pH value and potassium ferrate difference additional amount；
Figure 10 is the reciprocation of the different preoxidation times of different activities charcoal dosage and potassium ferrate to COD removal rate
Effect picture；
Figure 11 is effect of the reciprocation to COD removal rate of the different preoxidation times of different pH value and potassium ferrate
Figure；
Figure 12 is effect picture of the reciprocation to COD removal rate of the different additional amounts of different pH value and active carbon.
Specific embodiment
Technical solution of the present invention is described in further detail below with reference to embodiment.
The black and odorous water handled needed for of the invention is derived from certain small enclosed water body, and water body flow is poor.Water quality is apparently black
Color gives out the peculiar smell for making us uncomfortable, for typical black and odorous water.Water quality performance is as shown in table 1, the detection method used to water body
It is as shown in table 2 below with equipment and instrument.
1 black and odorous water water quality performance of table
| Index | COD(mg/L) | NH3-N(mg/L) | Turbidity (NTU) |
| Range | 44-67 | 1.58-2.46 | 84-134 |
| Average value | 62 | 2.05 | 112 |
2 monitoring index of table, analysis method and instrument and equipment
Embodiment 1
Method using potassium ferrate and activated carbon combined enhanced coagulation processing black and odorous water includes the following steps: to black smelly
Potassium ferrate pre-oxidation 15min is added in water body, aluminium polychloride and active carbon is added, adjusting pH value is 10, is first existed
3min is stirred under the conditions of 250r/min, then stirs 4min under the conditions of 100r/min, then stirs 8min under the conditions of 30r/min
Afterwards, 25min is staticly settled.Wherein, 50mg, ferric acid is added in the black and odorous water that the additional amount of aluminium polychloride is 1L
Potassium additional amount is that additional amount is that 1.2mg is added in the black and odorous water of 1L in the black and odorous water of 1L, and the additional amount of active carbon is 1L's
20mg is added in black and odorous water.
Embodiment 2
Method using potassium ferrate and activated carbon combined enhanced coagulation processing black and odorous water includes the following steps: to black smelly
Potassium ferrate pre-oxidation 5min is added in water body, aluminium polychloride and active carbon is added, adjusting pH value is 5, first in 350r/
1min is stirred under the conditions of min, then stirs 2min under the conditions of 200r/min, then under the conditions of 100r/min after stirring 3min, it is quiet
Set precipitating 15min.Wherein, 10mg is added in the black and odorous water that the additional amount of aluminium polychloride is 1L, potassium ferrate is added
Additional amount is that 0.8mg is added in the black and odorous water of 1L in the black and odorous water that amount is 1L, and the additional amount of active carbon is the black smelly water of 1L
10mg is added in body.
Embodiment 3
The embodiment selectes K2FeO4With dosage, the K of two kinds of medicaments of GAC2FeO4Four factors of preoxidation time and pH value
As independent variable.According to center combination principle, 4 factor of BBD modelling in Design-expert response surface design software is utilized
3 horizontal totally 29 groups of test combinations schemes (table 3), wherein factorial part Experiment number is 24 times, and it is 5 times that central point, which repeats experiment,
So that it is determined that the optimised process of water quality is suitble to combine (table 4).BBD model optimization experimental design factor and level are shown in Table 3.
Table 3 tests independent variable factor coding and level
Carry out response surface design experiment, experimental design by BBD model in Design-expert response surface design software according to table 3
With the results are shown in Table shown in 4.
4 response surface design experimental design of table and result
According to the experimental result of table 4, multiple regression fitting and side are carried out to experimental data using Design-expert software
Difference analysis.Since turbidity removal rate has reached saturation, therefore only choose K2FeO4Dosage (A), preoxidation time (B), GAC are added
(C) and four factors of pH value (D) are measured to NH3The influence of-N and COD removal rate carries out variance analysis.Wherein, NH3- N and COD removal
The even experiment design of rate is shown below:
YNH3-N=+84.02+9.96A+0.70B+1.26C-2.37D-
0.98AB+18.48AC+2.28AD+0.72BC+10.35BD+9.27CD-10.72A2-6.86B2-18.04C2-
10.78D2(model 1)
YCOD=+68.34+4.07A+0.63B+4.48C-1.87D-5.03AB-2.63AC+9.35AD+5.92B C-
1.57BD-2.89CD-9.09A2-18.36B2-9.08C2-7.78D2(model 2)
For the accuracy of testing model 1 and model 2, the ANOVE being respectively adopted in BBD model analyzes above-mentioned recurrence mould
Type 1 and model 2, the results are shown in Table 5 and table 6.
The conspicuousness and variance analysis of 5 NH3-N removal rate prediction model 1 of table
By table 5 it is found that the F value of prediction model 1 is value≤0.0001 172.56, P, illustrate NH3- N removal rate predicts mould
Type is highly significant, wherein K2FeO4Dosage (A) compares GAC dosage (C) and K with the P value of pH (D)2FeO4Pre-oxidation
The P value of time (B) is smaller, illustrates K2FeO4Dosage (A) and pH (D) can more influence NH3The removal rate of-N；Lose the F value in quasi- item
It is 0.3108 for 1.75, P value, is much larger than 0.05, also turns out the feasibility of model 1.Coefficient of determination R2=0.9942, illustrate the reality
It applies the prediction result of example example and the goodness of fit for actually occurring situation is high；Correct coefficient of determination Adj R2=0.9885, indicate mould
98.85% experimental data can be explained with this regression model in type 1；Predict coefficient of determination Pred R2=0.9713 and correction determine
Determine coefficient Adj R2=0.9885 difference is 0.0172 within 0.2, and signal-to-noise ratio Adeq Precision=49.368 is remote
Greater than 4, it was demonstrated that model 1 is extremely reliable.
The conspicuousness and variance analysis of 6 COD removal rate prediction model 2 of table
As shown in Table 6, the F value of prediction model 2 is 62.92, P value less than 0.0001, and the F value for losing quasi- item is 0.74, and is lost
P value in quasi- item is 0.6821, illustrates that COD removal rate prediction model has the conspicuousness of height.Meanwhile K2FeO4Dosage (A)
It is respectively less than 0.0001 with the P value of GAC dosage (C), illustrates that the influence significance degree to COD removal rate better than pH (D), influences journey
Spending minimum is K2FeO4Preoxidation time (B)；K2FeO4The reciprocation and K of dosage (A) and pH (D)2FeO4When pre-oxidation
Between (B) and GAC dosage (C) interactive influence it is also extremely significant.Coefficient of determination R2=0.9844, illustrate model 2
It is with a high credibility, correct coefficient of determination Adj R2=0.9687 and prediction coefficient of determination Pred R2=0.9329 is almost the same, noise
Than Adeq Precision=25.063 > 4, illustrate that the accuracy of model 2 is higher, it being capable of preferable reaction model independent variable and sound
Relationship between should being worth.
4 sound curved surface effect of embodiment
By the K of Design-Expert software process quality2FeO4Dosage (A), preoxidation time (B), GAC dosage (C)
With the pairwise interaction in four factors of pH value (D) to each COD and NH3The three-dimensional response surface design figure that-N removal effect influences is such as
Shown in Fig. 1 to 12.
By Fig. 1 to Fig. 6 it is found that K2FeO4It is combined with GAC to NH3The removal effect of-N is substantially better than conventional coagulation, by scheming
Middle contour map and curvature of curved surface are it is found that K2FeO4The reciprocation and K of dosage and GAC dosage2FeO4Preoxidation time with
The reciprocation of pH value is to NH3The removal effect influence of-N is the most significant, and influence next is the interaction of GAC dosage and pH value
Effect.K2FeO4Dosage and K2FeO4The reciprocation and K of preoxidation time2FeO4The reciprocation of preoxidation time and pH value
Minimum is influenced, it is consistent with equation analysis result.Four factors are to NH according to F value3The influence size of-N removal rate sorts are as follows:
K2FeO4Dosage > pH > GAC dosage > K2FeO4Preoxidation time.
By Fig. 7 to Figure 12 it is found that the reciprocation between each factor has an impact to the removal rate of COD.It wherein influences most
To be significantly K2FeO4The reciprocation of dosage and pH value, the followed by reciprocation of preoxidation time and GAC dosage.
In conjunction with F value, four factors influence to sort on COD removal rate are as follows: GAC dosage > K2FeO4Dosage > pH > K2FeO4When pre-oxidation
Between.
Embodiment 5
Method using potassium ferrate and activated carbon combined enhanced coagulation processing black and odorous water includes the following steps:
Potassium ferrate pre-oxidation 10min is added into black and odorous water, aluminium polychloride and active carbon is added, adjusts pH
Value is 7.36,2min is first stirred under the conditions of 300r/min, then 3min is stirred under the conditions of 150r/min, then in 50r/min item
After stirring 5min under part, 20min is staticly settled.Wherein, it is added in the black and odorous water that the additional amount of aluminium polychloride is 1L
30mg, potassium ferrate additional amount are that additional amount is that 1mg is added in the black and odorous water of 1L in the black and odorous water of 1L, the addition of active carbon
16.2mg is added in the black and odorous water that amount is 1L.
Supernatant is taken to be detected it is found that NH in the water body that the embodiment is handled3The removal rate of-N is up to 81.91%, COD's
For removal rate up to 66.7, the removal rate which obtains simulates the result obtained close to corresponding surface.
Through the foregoing embodiment it is found that by by K2FeO4It first pre-oxidizes to cooperate with GAC again and repairs black and odorous water, Neng Gouyou
Effect improves turbidity, COD and NH3The removal rate of the pollutants such as-N.In addition, the present invention uses granular active carbon.
Claims (9)
1. a kind of method using potassium ferrate and activated carbon combined enhanced coagulation processing black and odorous water, it is characterised in that including such as
Lower step: potassium ferrate and aluminium polychloride stirring being added into black and odorous water, adds active carbon, after adjusting pH value 5~10,
It is stirred to react, staticly settles；Wherein, the mass volume ratio of the potassium ferrate and black and odorous water is 0.8~1.2:1, is gathered
The mass volume ratio for closing aluminium chloride and black and odorous water is 10~50:1, the mass volume ratio of active carbon and black and odorous water is 10~
20:1。
2. the method that black and odorous water is handled using potassium ferrate and activated carbon combined enhanced coagulation according to claim 1,
Be characterized in that: addition potassium ferrate and the aluminium polychloride into black and odorous water are that potassium ferrate pre-oxidation 5 is first added
Aluminium polychloride is added after~15min.
3. special using the method for potassium ferrate and activated carbon combined enhanced coagulation processing black and odorous water according to claim
Sign is: 10~15min of the pre-oxidation.
4. the method that black and odorous water is handled using potassium ferrate and activated carbon combined enhanced coagulation according to claim 1,
Be characterized in that: described be stirred to react first stirs 1~3min under the conditions of 250~350r/min, then in 100~200r/min condition
2~4min of lower stirring, then 3~8min is stirred under the conditions of 30~100r/min.
5. the method that black and odorous water is handled using potassium ferrate and activated carbon combined enhanced coagulation according to claim 1,
Be characterized in that: the mass volume ratio of the potassium ferrate and black and odorous water is 1~1.2:1.
6. the method that black and odorous water is handled using potassium ferrate and activated carbon combined enhanced coagulation according to claim 1,
Be characterized in that: the mass volume ratio of the aluminium polychloride and black and odorous water is 30~50:1.
7. the method that black and odorous water is handled using potassium ferrate and activated carbon combined enhanced coagulation according to claim 1,
Be characterized in that: the mass volume ratio of the active carbon and black and odorous water is 16~20:1.
8. the method that black and odorous water is handled using potassium ferrate and activated carbon combined enhanced coagulation according to claim 1,
Be characterized in that: the pH value is 7~10.
9. the method that black and odorous water is handled using potassium ferrate and activated carbon combined enhanced coagulation according to claim 1,
It is characterized in that: described to staticly settle 15~25min.
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| CN110745998A (en) * | 2019-11-13 | 2020-02-04 | 中国科学院水生生物研究所 | Composite material for removing algae-derived odor substances in black and odorous water body and preparation method and application thereof |
| CN113526739A (en) * | 2021-08-04 | 2021-10-22 | 浙江欧德利科技有限公司 | Process for removing COD (chemical oxygen demand) and ammonia nitrogen in desulfurization wastewater |
| CN114890485A (en) * | 2022-06-09 | 2022-08-12 | 四川环科检测技术有限公司 | Efficient algae removal medicament bag and preparation method and application thereof |
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Application publication date: 20190122 |
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