CN114368799A - Sepiolite sewage treating agent MZ series and sewage treating method - Google Patents
Sepiolite sewage treating agent MZ series and sewage treating method Download PDFInfo
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- CN114368799A CN114368799A CN202111637356.2A CN202111637356A CN114368799A CN 114368799 A CN114368799 A CN 114368799A CN 202111637356 A CN202111637356 A CN 202111637356A CN 114368799 A CN114368799 A CN 114368799A
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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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
Abstract
The invention discloses a sepiolite sewage treatment agent MZ series and a sewage treatment method. The sepiolite sewage treatment agent MZ series comprises, by mass, 20-50 parts of sepiolite powder, 10-30 parts of activated carbon powder, 20-40 parts of polymeric ferric sulfate, 5-10 parts of ferric trichloride and 5-10 parts of ferrous sulfate. The polymeric ferric sulfate and ferric trichloride in the sepiolite sewage treatment agent MZ series can provide an acidic condition, so that the surface treatment can be performed on the sepiolite powder and the activated carbon powder, the specific surface area of the sepiolite powder and the activated carbon powder is enlarged, the adsorption capacity of the sepiolite powder and the activated carbon powder is improved, and the polymeric ferric sulfate, ferric trichloride and ferrous sulfate can play a flocculation effect, so that the better effects of reducing COD, removing chromaticity, removing phosphorus and removing odor can be achieved.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to a sepiolite sewage treatment agent MZ series and a sewage treatment method.
Background
With the rapid development of economy in China, the discharge amount of industrial sewage and domestic sewage generated in production and life is larger and larger.
The harmful components in the wastewater mainly include BOD (Biochemical Oxygen Demand), COD (Chemical Oxygen Demand).
The fenton oxidation method is a method for reducing COD in sewage in common use at present, however, the fenton oxidation method needs to use a large amount of hydrogen peroxide, so that the treatment cost is high, and the fenton oxidation method also needs to ensure an acidic environment, so that on one hand, operation risks are brought, and on the other hand, secondary pollution is also generated.
Disclosure of Invention
Based on the above, there is a need for providing a sepiolite sewage treatment agent MZ series that can solve the above problems.
In addition, a sewage treatment method is also needed to be provided.
A sepiolite sewage treatment agent MZ series comprises, by mass, 20-50 parts of sepiolite powder, 10-30 parts of activated carbon powder, 20-40 parts of polyferric sulfate, 5-10 parts of ferric trichloride and 5-10 parts of ferrous sulfate.
In one embodiment, the mass ratio of the sepiolite powder to the activated carbon powder is 1.5-2: 1.
in one embodiment, the mass ratio of the polymeric ferric sulfate to the sum of the ferric trichloride and the ferrous sulfate is 1-3: 1.
in one embodiment, the mass ratio of the sum of the masses of the sepiolite powder and the activated carbon powder to the sum of the masses of the polymeric ferric sulfate, the ferric trichloride and the ferrous sulfate is 1: 1.25 to 1.6.
In one embodiment, the particle size of the sepiolite powder is 100-300 meshes, and the particle size of the activated carbon powder is 100-300 meshes.
In one embodiment, the sepiolite sewage treatment agent MZ series includes, by mass, 35 parts of the sepiolite powder, 20 parts of the activated carbon powder, 30 parts of the polymeric ferric sulfate, 8 parts of the ferric trichloride, and 8 parts of the ferrous sulfate.
A sewage treatment method comprises the following steps:
providing the sepiolite sewage treatment agent MZ series;
mixing the sepiolite sewage treating agent MZ series with sewage to be treated according to a mass ratio of 3-8: 1000, fully stirring, standing and precipitating.
In one embodiment, the sepiolite sewage treatment agent MZ series and the sewage to be treated are mixed according to the mass ratio of 3-8: the 1000 mixing operation is:
adding the sepiolite sewage treating agent MZ series into the sewage to be treated in two times, wherein the mass ratio of the first-added sepiolite sewage treating agent MZ series to the second-added sepiolite sewage treating agent MZ series is 1.5-2: 1, the mass ratio of the sum of the mass of the first-added sepiolite sewage treatment agent MZ series and the mass of the second-added sepiolite sewage treatment agent MZ series to the mass of the sewage to be treated is 3-8: 1000.
in one embodiment, the method further comprises the step of mixing the sepiolite sewage treatment agent MZ series with sewage to be treated according to a mass ratio of 3-8: 1000 prior to the operation of mixing, the following operations were performed:
and mixing the sepiolite sewage treating agent MZ series with water of which the volume is 8-20 times that of the sepiolite sewage treating agent MZ series solution.
In one embodiment, the method further comprises the following operation after the operation of obtaining the sepiolite sewage treatment agent MZ series solution:
and after the sepiolite sewage treating agent MZ series solution is placed for 0.5 h-2 h, the sepiolite sewage treating agent MZ series solution is used for subsequent sewage treatment.
The polymeric ferric sulfate and ferric trichloride in the sepiolite sewage treatment agent MZ series can provide an acidic condition, so that the surface treatment can be performed on the sepiolite powder and the activated carbon powder, the specific surface area of the sepiolite powder and the activated carbon powder is enlarged, the adsorption capacity of the sepiolite powder and the activated carbon powder is improved, and the polymeric ferric sulfate, ferric trichloride and ferrous sulfate can play a flocculation effect, so that the better effects of reducing COD, removing chromaticity, removing phosphorus and removing odor can be achieved.
Compared with a Fenton oxidation method, when the sepiolite sewage treatment agent MZ series is used, expensive hydrogen peroxide does not need to be additionally added, and acid addition is also not needed.
In addition, the sepiolite powder and the activated carbon powder are used in a matched mode, so that the adsorption effect of the sepiolite sewage treatment agent MZ series is further improved, and meanwhile, the flocculation effect of the sepiolite sewage treatment agent MZ series is further improved due to the matched use of the polymeric ferric sulfate, the ferric trichloride and the ferrous sulfate.
In addition, when the sepiolite sewage treatment agent MZ series is used, the use effect is not changed by the influence of the external environment (factors such as temperature and humidity). And the sepiolite sewage treating agent MZ series can be added directly in the form of powder, or can be added after being prepared into solution in advance, the use mode is diversified, and the specific adding form can be selected according to the actual situation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
FIG. 1 is a flow chart of a wastewater treatment method according to an embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention discloses a sepiolite sewage treatment agent MZ series of an embodiment, according to the quality part, including 20-50 parts of sepiolite powder, 10-30 parts of activated carbon powder, 20-40 parts of polyferric sulfate, 5-10 parts of ferric trichloride and 5-10 parts of ferrous sulfate.
The polymeric ferric sulfate and ferric trichloride in the sepiolite sewage treatment agent MZ series can provide an acidic condition, so that the surface treatment can be performed on the sepiolite powder and the activated carbon powder, the specific surface area of the sepiolite powder and the activated carbon powder is enlarged, the adsorption capacity of the sepiolite powder and the activated carbon powder is improved, and the polymeric ferric sulfate, ferric trichloride and ferrous sulfate can play a flocculation effect, so that the better effects of reducing COD, removing chromaticity, removing phosphorus and removing odor can be achieved.
Compared with a Fenton oxidation method, when the sepiolite sewage treatment agent MZ series is used, expensive hydrogen peroxide does not need to be additionally added, and acid addition is also not needed.
In addition, the sepiolite powder and the activated carbon powder are used in a matched mode, so that the adsorption effect of the sepiolite sewage treatment agent MZ series is further improved, and meanwhile, the flocculation effect of the sepiolite sewage treatment agent MZ series is further improved due to the matched use of the polymeric ferric sulfate, the ferric trichloride and the ferrous sulfate.
In addition, when the sepiolite sewage treatment agent MZ series is used, the use effect is not changed by the influence of the external environment (factors such as temperature and humidity). And the sepiolite sewage treating agent MZ series can be added directly in the form of powder, or can be added after being prepared into solution in advance, the use mode is diversified, and the specific adding form can be selected according to the actual situation.
The sepiolite sewage treatment agent MZ series improves the ionic degree and the surface area by carrying out acid modification on natural polymer mineral product sepiolite, and then is compounded with activated carbon powder, polyferric sulfate, ferric trichloride and ferrous sulfate, belongs to inorganic chemical products, is slightly acidic, does not contain heavy metal, does not contain harmful substances, and is environment-friendly.
The counter ions in the sepiolite sewage treatment agent MZ series can break the colloid double-electrode layer structure in the sewage, compress the double-electrode layer, and transfer harmful substances in the sewage from the water to the sludge through the functions of chelation, bridging, rolling, adsorption, net catching and the like, so that the water quality is purified.
In addition, the sepiolite component in the sepiolite sewage treatment agent MZ series has the following advantages: good solubility, large specific surface area, high ionicity, simultaneous existence of anions and cations on a single carrier, fast reaction, small influence by water temperature, good synergistic effect with a coagulant and a coagulant aid, strong adaptability to sewage, small sludge amount and no toxicity to sludge.
The sepiolite sewage treating agent MZ series is convenient to add, simple and fast to prepare, and convenient to transport and store.
Preferably, the mass ratio of the sepiolite powder to the activated carbon powder is 1.5-2: 1. the sepiolite powder and the activated carbon powder are matched for use, so that the adsorption effect of the sepiolite sewage treatment agent MZ series is improved.
More preferably, the mass ratio of the polymeric ferric sulfate to the sum of ferric trichloride and ferrous sulfate is 1-3: 1. the cooperation of the polyferric sulfate, the ferric trichloride and the ferrous sulfate improves the flocculation effect of the sepiolite sewage treatment agent MZ series.
Particularly preferably, the mass ratio of the sum of the masses of the sepiolite powder and the activated carbon powder to the sum of the masses of the polymeric ferric sulfate and the ferric trichloride is 1: 1.25 to 1.6.
The polyferric sulfate and ferric trichloride can provide acidic conditions, so that the sepiolite powder and the activated carbon powder can be subjected to acidizing surface treatment, the specific surface area of the sepiolite powder and the activated carbon powder is enlarged, and the adsorption capacity of the sepiolite powder and the activated carbon powder is improved.
In order to ensure sufficient acidification of the sepiolite powder and the activated carbon powder, it is particularly preferable that the mass ratio of the sum of the sepiolite powder and the activated carbon powder to the sum of the masses of the polymeric ferric sulfate and ferric trichloride is 1: 1.25 to 1.6.
Preferably, in the present embodiment, the sepiolite powder has a particle size of 100 to 300 mesh, and the activated carbon powder has a particle size of 100 to 300 mesh.
In a particular embodiment, the sepiolite sewage treatment agent MZ series comprises 35 parts of sepiolite powder, 20 parts of activated carbon powder, 30 parts of polymeric ferric sulfate, 8 parts of ferric trichloride and 8 parts of ferrous sulfate by mass.
Preferably, the sepiolite sewage treatment agent MZ series of the invention is used for the treatment of coking phenol cyanogen sewage.
The invention also discloses a sewage treatment method of an embodiment, which comprises the following steps:
s10, providing a sepiolite sewage treatment agent MZ series.
The sepiolite sewage treating agent MZ series can be selected from the sepiolite sewage treating agent MZ series.
S20, mixing the sepiolite sewage treatment agent MZ series with sewage to be treated according to a mass ratio of 3-8: 1000, fully stirring, standing and precipitating.
Preferably, the sepiolite sewage treatment agent MZ series and the sewage to be treated are mixed according to the mass ratio of 3-8: the 1000 mixing operation is:
adding a sepiolite sewage treating agent MZ series into sewage to be treated in two times, wherein the mass ratio of the first-added sepiolite sewage treating agent MZ series to the second-added sepiolite sewage treating agent MZ series is 1.5-2: 1, the mass ratio of the sum of the mass of the first-added sepiolite sewage treatment agent MZ series and the second-added sepiolite sewage treatment agent MZ series to the mass of the sewage to be treated is 3-8: 1000.
by adding the sepiolite sewage treating agent MZ series twice, the COD in the sewage can be removed better.
Preferably, the method further comprises the step of mixing 3-8 mass ratio of a sepiolite sewage treatment agent MZ series to sewage to be treated: 1000 prior to the operation of mixing, the following operations were performed:
mixing the MZ series of sepiolite sewage treatment agents with water with the volume of 8-20 times to obtain MZ series solution of the sepiolite sewage treatment agents.
Preferably, the sepiolite sewage treatment agent MZ series is mixed with 9 times of water by volume to obtain the sepiolite sewage treatment agent MZ series solution.
Generally, in a sepiolite sewage treatment agent MZ series solution, the concentration of the sepiolite sewage treatment agent MZ series solution is high, and the pH of the sepiolite sewage treatment agent MZ series solution can reach 2-3 usually, so that the acidification treatment of sepiolite powder and activated carbon powder can be better realized.
More preferably, the method further comprises the following operation after the operation of obtaining the sepiolite sewage treatment agent MZ series solution: after the sepiolite sewage treating agent MZ series solution is placed for 0.5 h-2 h, it is used for the subsequent sewage treatment.
After the sepiolite sewage treatment agent MZ series solution is placed for 0.5 h-2 h, the acidification treatment of the sepiolite powder and the activated carbon powder is fully completed.
Preferably, the sepiolite sewage treatment agent MZ series solution is placed for 1h and then used for subsequent sewage treatment.
The following are specific examples.
Example 1
Weighing 35g of sepiolite powder, 20g of activated carbon powder, 30g of polyferric sulfate, 8g of ferric trichloride and 8g of ferrous sulfate, and uniformly mixing to obtain the sepiolite sewage treatment agent MZ series.
Example 2
Weighing 20g of sepiolite powder, 30g of activated carbon powder, 20g of polyferric sulfate, 5g of ferric trichloride and 5g of ferrous sulfate, and uniformly mixing to obtain the sepiolite sewage treatment agent MZ series.
Example 3
Weighing 50g of sepiolite powder, 10g of activated carbon powder, 40g of polyferric sulfate, 10g of ferric trichloride and 10g of ferrous sulfate, and uniformly mixing to obtain the sepiolite sewage treatment agent MZ series.
Example 4
Weighing 35g of sepiolite powder, 30g of activated carbon powder, 40g of polyferric sulfate, 10g of ferric trichloride and 10g of ferrous sulfate, and uniformly mixing to obtain the sepiolite sewage treatment agent MZ series.
Example 5
Weighing 20g of sepiolite powder, 20g of activated carbon powder, 30g of polymeric ferric sulfate, 6g of ferric trichloride and 6g of ferrous sulfate, and uniformly mixing to obtain the sepiolite sewage treatment agent MZ series.
Example 6
Weighing 25g of sepiolite powder, 20g of activated carbon powder, 30g of polymeric ferric sulfate, 6g of ferric trichloride and 8g of ferrous sulfate, and uniformly mixing to obtain the sepiolite sewage treatment agent MZ series.
Test example 1
The sewage to be treated in the test example 1 is the sewage of coking phenol cyanogen of Wu-Steel, and the water quality detection and analysis results are shown in the following table 1.
Table 1: water quality analysis data of sewage to be treated
| Index of pollutants | CODCr/mg/L | cyanide/mg/L | Chroma/multiple | pH | Remarks for note |
| Results | 518 | 0.191 | 68 | 7.3 | Dark brown |
The main equipment used in test example 1 included: HJ-2 magnetic heating stirrer (Jiangsu jin Yi Instrument science and technology Co., Ltd.), JH723 multi-parameter water quality detector (Shanghai Hua science and technology Instrument Co., Ltd.), measuring cup, balance and the like.
The sepiolite sewage treatment agent MZ series obtained in the embodiments 1-6 are respectively configured into 10 wt% sepiolite sewage treatment agent MZ series (water) solution, and the solution is kept stand for 1 hour for standby.
And (3) taking 500mL of sewage to be treated, adding 20mL of the sepiolite sewage treatment agent MZ series solution obtained in the embodiment 1 in two times, mechanically stirring for 20 minutes, adding 10mL again, stirring for 10 minutes, adjusting the pH value to 4-5.5, and precipitating for 1 hour.
And (3) respectively treating the sewage to be treated by the sepiolite sewage treating agent MZ series solutions obtained in the embodiments 2-6 by the same operation.
And (3) taking the supernatant for water quality detection, filtering the sludge, drying and weighing, wherein the test results are shown in the following table 2.
Meanwhile, the Fenton oxidation method is adopted to treat the sewage to be treated.
Table 2: detection result of supernatant of treated sewage to be treated
Comparing table 1 and table 2, it can be seen that the sepiolite wastewater treatment agent MZ series obtained in examples 1 to 6 can significantly reduce COD in wastewater to be treated, can greatly reduce chroma, remove cyanide with small amplitude, and the pH of the supernatant is 6.7 to 6.8, so that no acidified wastewater is generated, and the amount of sludge is only 4 to 6 per thousand.
Compared with the Fenton oxidation method, when the sepiolite sewage treatment agent MZ series obtained in the embodiments 1-6 is used for treating sewage, COD in the sewage to be treated can be remarkably reduced, chromaticity can be greatly reduced, cyanide is removed in a small range, the supernatant of the treated sewage is basically neutral, no acidified sewage is generated, and the amount of generated sludge is reduced by about 1/3 compared with the amount of sludge generated by the Fenton oxidation method.
The sepiolite sewage treatment agent MZ series obtained in examples 1-6 has obvious effect of treating coking phenol cyanogen sewage of steel, and can ensure that the sewage of a coking secondary sedimentation tank can reach the standard after being treated and be discharged. The process flow is simple, the operation is easy, the effluent quality is stable, the dosage can be adjusted according to the influent quality, and the effluent can reach the standard stably. Compared with the existing coking sewage treatment process, the method has outstanding characteristics. In addition, dangerous chemical raw materials such as acid, hydrogen peroxide and the like are not required to be added in the sepiolite sewage treating agent MZ series for treating the coking phenol cyanogen sewage of the armed steel, ozone is omitted, the alkali consumption is greatly reduced, the labor intensity of workers is reduced, the sludge amount is reduced by about 1/3, and the total cost of water treatment is reduced.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The sepiolite sewage treatment agent MZ series is characterized by comprising, by mass, 20-50 parts of sepiolite powder, 10-30 parts of activated carbon powder, 20-40 parts of polyferric sulfate, 5-10 parts of ferric trichloride and 5-10 parts of ferrous sulfate.
2. The sepiolite sewage treatment agent MZ series according to claim 1, wherein the mass ratio of the sepiolite powder to the activated carbon powder is 1.5-2: 1.
3. the sepiolite sewage treatment agent MZ series of claim 2, wherein the mass ratio of said polymeric ferric sulfate to the sum of said ferric trichloride and said ferrous sulfate is from 1 to 3: 1.
4. the sepiolite sewage treatment agent MZ series of claim 3, wherein the mass ratio of the sum of the mass of said sepiolite powder and said activated carbon powder to the sum of the mass of said polymeric ferric sulfate, said ferric trichloride and said ferrous sulfate is 1: 1.25 to 1.6.
5. The sepiolite sewage treatment agent MZ series of claim 4, wherein said sepiolite powder has a particle size of 100 mesh to 300 mesh and said activated carbon powder has a particle size of 100 mesh to 300 mesh.
6. The sepiolite sewage treatment agent MZ series according to any one of claims 1 to 5, wherein said sepiolite sewage treatment agent MZ series comprises, by mass, 35 parts of said sepiolite powder, 20 parts of said activated carbon powder, 30 parts of said polymeric ferric sulfate, 8 parts of said ferric trichloride, and 8 parts of said ferrous sulfate.
7. A sewage treatment method is characterized by comprising the following steps:
providing a sepiolite sewage treatment agent MZ series as claimed in any one of claims 1 to 6;
mixing the sepiolite sewage treating agent MZ series with sewage to be treated according to a mass ratio of 3-8: 1000, fully stirring, standing and precipitating.
8. The sewage treatment method according to claim 7, wherein the ratio of the sepiolite sewage treatment agent MZ series to the sewage to be treated is 3-8: the 1000 mixing operation is:
adding the sepiolite sewage treating agent MZ series into the sewage to be treated in two times, wherein the mass ratio of the first-added sepiolite sewage treating agent MZ series to the second-added sepiolite sewage treating agent MZ series is 1.5-2: 1, the mass ratio of the sum of the mass of the first-added sepiolite sewage treatment agent MZ series and the mass of the second-added sepiolite sewage treatment agent MZ series to the mass of the sewage to be treated is 3-8: 1000.
9. the sewage treatment method according to claim 7, further comprising the step of mixing the sepiolite sewage treatment agent MZ series with sewage to be treated in a mass ratio of 3-8: 1000 prior to the operation of mixing, the following operations were performed:
and mixing the sepiolite sewage treating agent MZ series with water of which the volume is 8-20 times that of the sepiolite sewage treating agent MZ series solution.
10. The sewage treatment method according to claim 9, further comprising performing the following operations after the operation of obtaining the sepiolite sewage treatment agent MZ series solution:
and after the sepiolite sewage treating agent MZ series solution is placed for 0.5 h-2 h, the sepiolite sewage treating agent MZ series solution is used for subsequent sewage treatment.
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