CN111116012A - Sludge conditioner and application treatment method thereof - Google Patents
Sludge conditioner and application treatment method thereof Download PDFInfo
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- CN111116012A CN111116012A CN202010098841.6A CN202010098841A CN111116012A CN 111116012 A CN111116012 A CN 111116012A CN 202010098841 A CN202010098841 A CN 202010098841A CN 111116012 A CN111116012 A CN 111116012A
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/148—Combined use of inorganic and organic substances, being added in the same treatment step
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/004—Sludge detoxification
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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
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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
- C02F2101/20—Heavy metals or heavy metal compounds
-
- 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
- C02F2101/30—Organic compounds
Abstract
The invention belongs to the technical field of sludge treatment, and particularly relates to a sludge conditioner and an application treatment method thereof, wherein the sludge conditioner comprises the following components: 10-15 parts of filter aid, 1-5 parts of organic acid, 10-15 parts of oxidant and 40-60 parts of iron salt, and the pH value is adjusted to 4-6. The sludge conditioner disclosed by the invention is used for deeply dehydrating the sludge, so that the removal rate of heavy metals Pb and Cd in the sludge is relatively improved, the whole process is not more than 4.5 hours, the water content of the dried sludge is lower than 55%, secondary pollution is avoided, the sludge conditioner can be widely applied to drying treatment of various industrial and domestic sewage, the treated sludge is directly used for composting, incineration, building material application and the like, and the sludge conditioner has a good application prospect and a market prospect.
Description
Technical Field
The invention belongs to the technical field of sludge treatment, and particularly relates to a sludge conditioner and an application treatment method thereof.
Background
The amount of sewage treated by sewage treatment plants is increasing day by day, and the amount of sludge produced by sewage treatment is also increasing. The sludge generated by sewage plants is complex in composition, contains various microorganisms, organic matters and inorganic matters, and mainly contains organic matters, heavy metals, salts, pathogens and the like which are difficult to degrade. And most of sludge generated from industrial wastewater contains a large amount of heavy metals.
If the sludge is directly discharged without being treated, the sludge causes great harm to the environment. Because the sludge which is not subjected to stabilization treatment has high organic matter content, is easy to be decomposed, can breed a large amount of germs, parasites and the like, and is easy to cause secondary pollution to the environment. The sludge is washed by rainwater, flows to the surface water body and permeates into the ground to cause pollution. The sludge piled in the open air is easy to generate foul smell and propagate mosquitoes and flies, thus seriously affecting the sanitation of the surrounding environment. In the process of sludge transportation, the sludge is easy to leak along the way to form pollution due to higher water content. The high water content of the sludge reduces the transportation economy and increases the sludge transportation cost and the sludge disposal cost of the refuse landfill.
The existing sludge treatment mode is to directly bury the sludge of a sewage treatment plant or carry out dehydration treatment.
When dehydration treatment is carried out, the combined water and gap water in the sludge are difficult to dehydrate, and the percolate collecting system and the drainage pipe are often blocked due to the small water content of the sludge, so that the landfill body is easy to deform and slide due to the rheological property of the sludge caused by the high water content of the sludge.
As is well known, China is a big agricultural country, plant fiber resources are rich, particularly corncobs are corncobs, the corncobs are corncobs after corn ears are kernel-removed, the annual output of corn is 1.1-1.3 hundred million tons, more than 2000 million tons of corncobs can be produced as byproducts, the corncobs cannot be well utilized all the time, or the corncobs are thrown away as agricultural wastes or used as fuels, so that great waste is brought to resources, the corncobs contain a large amount of cellulose, and the corncobs are not easy to naturally decompose, have long decomposition time and are difficult to treat; meanwhile, corncobs can be converted into furfural after processing, the furfural can be used as a raw material for producing maltol, and the problem of utilization of the corncobs is solved. How to solve the problem of waste liquid utilization in the corncob and corncob conversion process is also the research direction at the present stage.
Therefore, it is the research direction of those skilled in the art how to reduce the water content of the sludge, perform sludge drying treatment, and make the dried sludge directly discharged for use.
Disclosure of Invention
The invention aims to solve the problems and provides a sludge conditioner and an application treatment method thereof, the sludge conditioner can deeply dehydrate sludge, can effectively remove heavy metal ions, organic pollutants, inorganic particles and the like in the sludge, and relatively improves the removal rate of heavy metals Pb and Cd in the sludge to realize harmless treatment of the sludge; the whole sludge drying process is not more than 4.5 hours, the water content of the dried sludge is less than 55 percent, no secondary pollution is caused, the sludge drying process can be widely applied to drying treatment of various industrial and domestic sewage, the treated sludge can be directly applied to composting, incineration, building material application and the like, and the sludge drying process has good application prospect and market prospect.
In order to realize the purpose, the invention adopts the technical scheme that:
the sludge conditioner comprises the following components in parts by weight: 10-15 parts of filter aid, 1-5 parts of organic acid, 10-15 parts of oxidant and 40-60 parts of iron salt.
Further, the filter aid includes a porous carbon matrix after condensation polymerization of ethyl maltol.
Furthermore, the ethyl maltol is prepared from corncobs, and the sludge conditioner also comprises residual industrial acid liquor in the preparation of the ethyl maltol from the corncobs.
Further, the organic acid includes kojic acid.
Further, the ferric salt comprises ferrous sulfate or polymeric ferric sulfate solution, and the mass concentration is 10% -15%.
Further, the oxidant comprises at least one of liquid ozone or hydrogen peroxide, and the mass concentration of the oxidant is 25-35%.
Further, the sludge conditioner also comprises a composite flocculant, wherein the composite flocculant comprises fly ash and polyacrylamide, and the weight ratio is as follows: 1-3:1.
An application treatment method of a sludge conditioner comprises the following steps:
s1, concentrating the raw mud with water content of more than 99% into concentrated mud with water content of 93% -97%;
s2, adding the concentrated mud obtained in the step S1 into the organic acid in parts by weight, and fully stirring for 10-30 minutes;
s3, adding the ferric salt and the oxidant in parts by weight, fully stirring for 10-30 minutes, adding the rest parts by weight of the components of the sludge conditioner, fully stirring for 30-60 minutes, and adding the residual industrial acid liquor or other acid liquor to adjust the pH value of the sludge to 4-6;
s4, finally, conveying the sludge into a high-pressure plate-and-frame filter press through a high-pressure pump for squeezing and dewatering to obtain dried sludge;
at 1m38-12kg of the sludge conditioner is added into the concentrated sludge in the S1.
Furthermore, the pressing pressure in S4 is 1.8-2.5Mpa, and the pressing time is 1.5-2.5 h.
Furthermore, the total time of the application treatment method of the sludge conditioner is 3.5-4.5h, and the range of the water content of the dried sludge is 45% -55%.
The invention has the beneficial effects that:
1. the sludge conditioner disclosed by the invention can be used for deeply dehydrating sludge, effectively removing heavy metal ions, organic pollutants, inorganic particles and the like in the sludge, relatively improving the removal rate of heavy metals Pb and Cd in the sludge, high organic matter decomposition rate, high TP removal rate (dephosphorization), high transparency of press-out water and excellent water quality, and realizing harmless treatment of the sludge;
the whole sludge drying process is not more than 4.5 hours, the water content of the dried sludge is less than 55 percent, no secondary pollution is caused, the sludge drying process can be widely applied to drying treatment of various industrial and domestic sewage, and the treated sludge can be directly applied to composting, burning, building material application and the like.
2. The filter aid is a porous carbon matrix after condensation polymerization of ethyl maltol, and the matrix forms a rigid grid with high permeability in sludge, so that the compressibility of the sludge can be effectively reduced, the sludge can still keep a porous structure under high pressure, and water in the sludge partially including bound water and interstitial water is changed into free water and flows out along the carbon veins of the porous carbon matrix, so that the sludge dewatering property is improved. And the subsequent carbonization, incineration and composting of the sludge play a role in increasing the carbon source; and the residual industrial acid liquid for preparing the ethyl maltol is used for adjusting the pH value of the sludge, so that the industrial wastewater is efficiently utilized, and the wastewater treatment cost and the sludge adjustment cost are saved.
3. The oxidant is liquid ozone or hydrogen peroxide, is environment-friendly, non-toxic and harmless, and can effectively sterilize; meanwhile, the oxidant destroys and releases loose extracellular polymers in the sludge through oxidation, oxidizes partial organic matters, increases oxygen in the sludge, enables microorganisms in the sludge to perform certain aerobic respiration, consumes partial organic matters in the eutrophic sludge, and improves the activity of the microorganisms in the sludge.
4. The organic acid is kojic acid, the effect of the kojic acid is two, firstly, heavy metals in the sludge and sewage are easily converted into dried sludge under the action of ferric salt and an oxidant, the kojic acid can be quickly chelated with the heavy metals, and the content of the heavy metals in the sludge and the damage of the heavy metals to the environment are reduced; secondly, the kojic acid has high solubility in sewage treatment with the pH value less than or equal to 6, and has obvious sterilization, bleaching and corrosion prevention effects.
5. The addition of the filter aid changes the structure of sludge, causes the distribution of extracellular bound water to change, reduces the particle size of sludge particles, adds the composite flocculant to re-flocculate sludge flocs, reduces the specific resistance between floc particles under the action of the medium fly ash and the porous carbon matrix of the composite flocculant, thereby reducing the difficulty of changing bound water and water in particle gaps into free water, namely water is separated from the particle size, and improves the dehydration speed; the addition of the composite flocculant causes the sludge flocs to be re-flocculated or the extracellular organic matters to be damaged, partial bound water is released, and a sludge framework and a dewatering channel are re-constructed; the porous dehydration channel of the middle polyacrylamide and the dehydration path of the carbon venation of the filter aid of the composite flocculant greatly improve the outflow speed of free water in sludge during squeezing dehydration and increase the separation path of water in the sludge, and the coal ash and the porous carbon matrix reduce the difficulty of sludge dehydration in two dehydration paths, namely reduce the dehydration resistance; the porous carbon matrix formed by the filter aid and the composite flocculant have strong convolution and adsorption effects, so that sludge flocs are further increased, the flocs are more compact, the dehydration difficulty is reduced, the dehydration path is increased, and the particle size and specific resistance of floc particles are reduced, so that internal moisture is easier to be extruded, the dehydration rate and the dehydration speed of sludge are improved, and the dehydration performance of sludge is improved. In addition, the filter aid and the fly ash have adsorption effect, so that organic pollutants and inorganic particles in the sludge can be effectively adsorbed, and the pollution of the sludge to the environment is reduced.
Detailed Description
The present invention is described in detail below for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the description of the present invention is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.
The sludge conditioner comprises the following components in parts by weight: 10-15 parts of filter aid, 1-5 parts of organic acid, 10-15 parts of oxidant and 40-60 parts of iron salt.
Preferably, the filter aid comprises a porous carbon matrix after condensation polymerization of ethyl maltol.
Preferably, the ethyl maltol is prepared from corncobs, and the sludge conditioner further comprises residual industrial acid liquor in the preparation of the ethyl maltol from the corncobs.
Preferably, the organic acid comprises kojic acid.
Preferably, the iron salt comprises ferrous sulfate or polymeric ferric sulfate solution, and the mass concentration is 10% -15%.
Preferably, the oxidant comprises at least one of liquid ozone or hydrogen peroxide, and the mass concentration is 25-35%.
Preferably, the sludge conditioner further comprises a composite flocculant, wherein the composite flocculant comprises fly ash and polyacrylamide, and the weight ratio is as follows: 1-3:1.
An application treatment method of a sludge conditioner comprises the following steps:
s1, concentrating the raw mud with water content of more than 99% into concentrated mud with water content of 93% -97%;
s2, adding the concentrated mud obtained in the step S1 into the organic acid in parts by weight, and fully stirring for 10-30 minutes;
s3, adding the ferric salt and the oxidant in parts by weight, fully stirring for 10-30 minutes, adding the rest parts by weight of the components of the sludge conditioner, fully stirring for 30-60 minutes, and adding the residual industrial acid liquor or other acid liquor to adjust the pH value of the sludge to 4-6;
s4, finally, conveying the sludge into a high-pressure plate-and-frame filter press through a high-pressure pump for squeezing and dewatering to obtain dried sludge;
at 1m38-12kg of the sludge conditioner is added into the concentrated sludge in the S1.
Preferably, the pressing pressure in S4 is 1.8-2.5Mpa, and the pressing time is 1.5-2.5 h.
Preferably, the total time of the application treatment method of the sludge conditioner is 3.5-4.5h, and the range of the water content of the dried sludge is 45% -55%.
Example 1
The sludge conditioner comprises the following components in parts by weight: 12 parts of filter aid, 2 parts of organic acid, 11 parts of oxidant and 43 parts of iron salt.
The filter aid includes a porous carbon matrix after condensation polymerization of ethyl maltol. The ethyl maltol is prepared from corncobs, and the sludge conditioner also comprises residual industrial acid liquor in the preparation of the ethyl maltol from the corncobs.
The organic acid comprises kojic acid. The iron salt comprises ferrous sulfate solution with the mass concentration of 10%.
The oxidant comprises hydrogen peroxide, and the mass concentration of the oxidant is 25%.
An application treatment method of a sludge conditioner comprises the following steps:
s1, concentrating raw mud with water content of more than 99% to concentrated mud with water content of 95%;
s2, adding the concentrated mud obtained in the step S1 into the organic acid in parts by weight, and fully stirring for 15 minutes;
s3, adding the ferric salt and the oxidant by weight part, fully stirring for 13 minutes, adding the rest components by weight part of the sludge conditioner, fully stirring for 35 minutes, and adding the residual industrial acid solution in the preparation of ethyl maltol from corncobs to adjust the pH value of the sludge to be 5;
s4, finally, conveying the sludge into a high-pressure plate-and-frame filter press through a high-pressure pump for squeezing and dewatering to obtain dried sludge;
at 1m310kg of the sludge conditioner was added to the concentrated sludge in S1. The pressing pressure in S4 is 2.0Mpa, and the pressing time is 2 h. The total time of the application treatment method of the sludge conditioner is 4.2h, and the range of the water content of the dried sludge is 54.5%.
Example 2
The sludge conditioner comprises the following components in parts by weight: 10 parts of filter aid, 1 part of organic acid, 10 parts of oxidant and 40 parts of iron salt.
The filter aid includes a porous carbon matrix after condensation polymerization of ethyl maltol. The ethyl maltol is prepared from corncobs, and the sludge conditioner also comprises residual industrial acid liquor in the preparation of the ethyl maltol from the corncobs.
The organic acid comprises kojic acid. The ferric salt comprises a polymeric ferric sulfate solution with the mass concentration of 10%.
The oxidant comprises hydrogen peroxide, and the mass concentration of the oxidant is 25%.
The sludge conditioner also comprises a composite flocculant, wherein the composite flocculant comprises fly ash and polyacrylamide, and the weight ratio is as follows: 1:1.
An application treatment method of a sludge conditioner comprises the following steps:
s1, concentrating the raw mud with water content of more than 99% to concentrated mud with water content of 93%;
s2, adding the concentrated mud obtained in the step S1 into the organic acid in parts by weight, and fully stirring for 10 minutes;
s3, adding the ferric salt and the oxidant in parts by weight, fully stirring for 10 minutes, adding the rest parts by weight of the components of the sludge conditioner, fully stirring for 30 minutes, and adding acid liquor to adjust the pH value of the sludge to be 4;
s4, finally, conveying the sludge into a high-pressure plate-and-frame filter press through a high-pressure pump for squeezing and dewatering to obtain dried sludge;
at 1m38kg of the sludge conditioner was added to the concentrated sludge in S1.
The pressing pressure in S4 is 1.8Mpa, and the pressing time is 1.5 h. The total time of the application treatment method of the sludge conditioner is 4h, and the range of the water content of the dried sludge is 50%.
Example 3
The sludge conditioner comprises the following components in parts by weight: 15 parts of filter aid, 5 parts of organic acid, 15 parts of oxidant and 60 parts of iron salt.
The filter aid includes a porous carbon matrix after condensation polymerization of ethyl maltol. The ethyl maltol is prepared from corncobs, and the sludge conditioner also comprises residual industrial acid liquor in the preparation of the ethyl maltol from the corncobs.
The organic acid comprises kojic acid. The iron salt comprises ferrous sulfate solution with the mass concentration of 5%.
The oxidant comprises liquid ozone, and the mass concentration of the liquid ozone is 35%.
The sludge conditioner also comprises a composite flocculant, wherein the composite flocculant comprises fly ash and polyacrylamide, and the weight ratio is as follows: 3:1.
An application treatment method of a sludge conditioner comprises the following steps:
s1, concentrating raw mud with water content of more than 99% to concentrated mud with water content of 97%;
s2, adding the concentrated mud obtained in the step S1 into the organic acid in parts by weight, and fully stirring for 30 minutes;
s3, adding the ferric salt and the oxidant in parts by weight, fully stirring for 30 minutes, adding the rest parts by weight of the components of the sludge conditioner, fully stirring for 60 minutes, and adding the residual industrial acid liquor to adjust the pH value of the sludge to be 6;
s4, finally, conveying the sludge into a high-pressure plate-and-frame filter press through a high-pressure pump for squeezing and dewatering to obtain dried sludge;
at 1m312kg of the sludge conditioner was added to the concentrated sludge in S1.
The pressing pressure in S4 is 2.5Mpa, and the pressing time is 2.5 h.
The total time of the application treatment method of the sludge conditioner is 4.5h, and the range of the water content of the dried sludge is 48%.
Example 4
The sludge conditioner comprises the following components in parts by weight: 13 parts of filter aid, 4 parts of organic acid, 14 parts of oxidant and 50 parts of iron salt.
The filter aid includes a porous carbon matrix after condensation polymerization of ethyl maltol. The ethyl maltol is prepared from corncobs, and the sludge conditioner also comprises residual industrial acid liquor in the preparation of the ethyl maltol from the corncobs.
The organic acid comprises kojic acid. The iron salt comprises ferrous sulfate or polymeric ferric sulfate solution, and the mass concentration is 14%.
The oxidant comprises hydrogen peroxide, and the mass concentration of the oxidant is 31%.
The sludge conditioner also comprises a composite flocculant, wherein the composite flocculant comprises fly ash and polyacrylamide, and the weight ratio is as follows: 2:1.
An application treatment method of a sludge conditioner comprises the following steps:
s1, concentrating raw mud with water content of more than 99% to concentrated mud with water content of 95%;
s2, adding the concentrated mud obtained in the step S1 into the organic acid in parts by weight, and fully stirring for 20 minutes;
s3, adding the ferric salt and the oxidant in parts by weight, fully stirring for 20 minutes, adding the rest parts by weight of the components of the sludge conditioner, fully stirring for 45 minutes, and adding the residual industrial acid liquor to adjust the pH value of the sludge to be 5;
s4, finally, conveying the sludge into a high-pressure plate-and-frame filter press through a high-pressure pump for squeezing and dewatering to obtain dried sludge;
at 1m310kg of the sludge conditioner was added to the concentrated sludge in S1.
The pressing pressure in S4 is 2.1Mpa, and the pressing time is 2.3 h.
The total time of the application treatment method of the sludge conditioner is 3.5h, and the range of the water content of the dried sludge is 45%.
Comparative example 1
In this comparative example, the porous carbon substrate after the condensation polymerization of the filter aid-based maltol was not used, and the other example was the same as example 4.
Comparative example 2
In this comparative example, the porous carbon matrix and composite flocculant after polycondensation of filter aid-based maltol were not added, and the other examples were the same as example 4.
Comparative example 3
In the comparative example, the porous carbon matrix after the condensation polymerization of the filter aid group maltol is not added, the composite flocculant comprises fly ash and polyacrylamide, and the weight ratio is as follows: 1: 2. the rest is the same as example 4.
Comparative example 4
In the comparative example, the porous carbon matrix after the condensation polymerization of the filter aid group maltol is not added, the composite flocculant comprises fly ash and polyacrylamide, and the weight ratio is as follows: 4: 1. the rest is the same as example 4.
The samples 1 to 4, the commercial sludge conditioner and the comparative samples 1 to 4, which are treated by the sludge treatment method of the invention, are respectively tested as an experimental group 1 to 4, a commercial sludge conditioner group and a comparative group 1 to 4, and the moisture content of the dried sludge, the transparency of the filter-pressed effluent and the COD and NH of the effluent supernatant are obtained and detected3The value of-N, TP, the results of which are shown in the following table:
table 1:
from the above table, it can be seen that the sludge conditioners prepared in examples 1, 2, 3 and 4 can effectively perform deep dehydration treatment on municipal sludge, wherein the sludge conditioner prepared in example 4 has better effect than the sludge conditioners prepared in other examples, so the sludge conditioner prepared in example 4 is the best example of the present invention. The oxidant of the invention makes loose extracellular in the sludge by oxidationThe filter aid is a porous carbon matrix obtained by condensation polymerization of ethyl maltol, has extremely strong effects of adsorbing organic pollutants, inorganic particles and sludge, and simultaneously, the porous carbon matrix and the composite flocculant act together to enhance the dehydration strength and the dehydration speed of the filter aid3-a degradation rate of N, TP value.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (10)
1. The sludge conditioner is characterized by comprising the following components in parts by weight: 10-15 parts of filter aid, 1-5 parts of organic acid, 10-15 parts of oxidant and 40-60 parts of iron salt.
2. The sludge conditioner of claim 1 wherein the filter aid comprises a porous carbon matrix after the condensation of ethyl maltol.
3. The sludge conditioner of claim 2, wherein the ethyl maltol is prepared from corncobs, and the sludge conditioner further comprises residual industrial acid in the preparation of the ethyl maltol from the corncobs.
4. The sludge conditioner of claim 1, wherein said organic acid comprises kojic acid.
5. The sludge conditioner of claim 1, wherein the iron salt comprises ferrous sulfate or polymeric ferric sulfate solution with a mass concentration of 10% -15%.
6. The sludge conditioner of claim 1, wherein the oxidant comprises at least one of liquid ozone or hydrogen peroxide at a concentration of 25-35% by mass.
7. The sludge conditioner of claim 1, further comprising a composite flocculant, wherein the composite flocculant comprises fly ash and polyacrylamide, and the weight ratio is as follows: 1-3:1.
8. The application treatment method of the sludge conditioner as claimed in any one of claims 1 to 7, which comprises the following steps:
s1, concentrating the raw mud with water content of more than 99% into concentrated mud with water content of 93% -97%;
s2, adding the concentrated mud obtained in the step S1 into the organic acid in parts by weight, and fully stirring for 10-30 minutes;
s3, adding the ferric salt and the oxidant by weight part, fully stirring for 10-30 minutes, adding the rest components by weight part of the sludge conditioner, fully stirring for 30-60 minutes, and adding residual industrial acid liquor or other acid liquor to adjust the pH value of the sludge to 4-6;
s4, finally, conveying the sludge into a high-pressure plate-and-frame filter press through a high-pressure pump for squeezing and dewatering to obtain dried sludge;
at 1m38-12kg of the sludge conditioner is added into the concentrated sludge in the S1.
9. The application and treatment method of the sludge conditioner as claimed in claim 8, wherein the pressing pressure in S4 is 1.8-2.5Mpa, and the pressing time is 1.5-2.5 h.
10. The application and treatment method of the sludge conditioner as claimed in claim 8, wherein the total time of the application and treatment method of the sludge conditioner is 3.5-4.5h, and the water content of the dried sludge is 45% -55%.
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| CN111732313A (en) * | 2020-06-29 | 2020-10-02 | 重庆工程职业技术学院 | Urban domestic sludge recycling treatment process |
| CN113481016A (en) * | 2021-07-29 | 2021-10-08 | 海南金象云农业科技有限公司 | Soil conditioner and preparation method and application thereof |
| CN114538745A (en) * | 2022-03-24 | 2022-05-27 | 广东卓信环境科技股份有限公司 | Sludge conditioner and sludge dewatering method |
| CN115232681A (en) * | 2022-04-27 | 2022-10-25 | 武汉鸿鑫天环保工程有限公司 | Preparation method of tank bottom oil sludge cleaning agent, cleaning agent and tank bottom oil sludge cleaning process |
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