CN112159071A - Inorganic polymer sludge conditioner and preparation method and application thereof - Google Patents
Inorganic polymer sludge conditioner and preparation method and application thereof Download PDFInfo
- Publication number
- CN112159071A CN112159071A CN202011021647.4A CN202011021647A CN112159071A CN 112159071 A CN112159071 A CN 112159071A CN 202011021647 A CN202011021647 A CN 202011021647A CN 112159071 A CN112159071 A CN 112159071A
- Authority
- CN
- China
- Prior art keywords
- sludge
- aluminum
- inorganic polymer
- conditioner
- raw material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- C02F11/143—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to an environmental pollution treatment material, and particularly discloses an inorganic polymer sludge conditioner and a preparation method and application thereof. According to the invention, by selecting raw materials and optimizing a preparation process, an inorganic polymer sludge conditioner with the Alb content of more than 50% and the total Alb and Alc content of more than 80% is developed and obtained, and the inorganic polymer sludge conditioner can be applied to the field of sludge treatment. The inorganic polymer sludge conditioner has a prefabricated polymerization form, and can be combined with LB-EPS (tightly combined extracellular polymer) outside sludge cells after being added into a sludge system (excess sludge or anaerobic digestion sludge), so that the capillary water absorption time (CST) of the sludge is reduced, and the dehydration performance of the sludge is enhanced. Meanwhile, the inorganic polymer sludge conditioner product is a pure liquid product with moderate pH, and overcomes the defects of the traditional lime plus FeCl3The conditioning process has the problems of large sludge dry-solid increment, strong sludge alkalinity after conditioning and difficult subsequent utilization, and has good popularization and application prospect.
Description
Technical Field
The invention relates to an environmental pollution treatment material, in particular to an inorganic polymer sludge conditioner and a preparation method and application thereof.
Background
The aluminum-based inorganic polymer water treatment functional material is a novel inorganic polymer material which is rapidly developed in recent years, has the advantages of wide application, low toxicity, low corrosivity and the like, and is widely applied to various links of water treatment and sludge treatment at present.
According to the research, the aluminum has different occurrence forms of hydrolytic polymerization, wherein the Al2-Al8The low-hydrolysis polymerization forms are called Ala and Al9-Al30The hydrolyzed polymeric form is referred to as Alb, and the higher hydrolyzed polymeric form is referred to as Alc.
It has been found that aluminum-based polymer materials having different forms of occurrence can correspond to different water treatment functions, and therefore, aluminum-based polymer materials having different forms of occurrence can be developed for different water treatment purposes.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide an inorganic polymer sludge conditioner and a preparation method and application thereof.
In order to realize the purpose of the invention, the technical scheme of the invention is as follows:
in a first aspect, the invention provides a preparation method of an inorganic polymer sludge conditioner, which comprises the following steps:
(1) crushing the aluminum-containing solid raw material to 100-order and 200-order, and adding the crushed material into a first reactor (reactor 1);
adding industrial hydrochloric acid or mixed acid of the industrial hydrochloric acid and sulfuric acid into the reactor 1, wherein the addition amount of the industrial hydrochloric acid or the mixed acid is 15-20 times of the mass of an aluminum element in the aluminum-containing solid raw material;
sealing the reactor 1, heating to 110-130 ℃, and reacting for 2-3 hours;
feeding the reaction product to a second reactor (reactor 2);
(2) heating the reactor 2 to 80 ℃, adding caustic alkali or sodium carbonate in batches under the condition of continuous heat preservation, wherein the mass of total added sodium element is 100-180% of the mass of aluminum element in the aluminum-containing solid raw material, the adding process needs to last for 1.5-2 hours, and the adding is carried out for more than 1 hour by continuous stirring reaction; after the reaction is finished, curing for 2 hours at the temperature of more than 60 ℃ to obtain the inorganic polymer sludge conditioner.
Further, in the step (1), when the aluminum-containing solid raw material is in a hydrated state, the aluminum-containing solid raw material is subjected to a drying treatment to control the water content of the aluminum-containing solid raw material to 10% or less. As an exemplary illustration, the drying process may specifically be: drying at 120 deg.C for more than 30 min.
Further, in the step (1), the aluminum-containing solid raw material is selected from one or more of aluminum hydroxide, bauxite and high-alumina fly ash.
Further, in the step (1), the concentration of the industrial hydrochloric acid is 25%, and the sulfuric acid proportion in the mixed acid of the industrial hydrochloric acid and the sulfuric acid is less than 10%.
Further, according to specific requirements, in step (1), FeCl can be added into the reactor 13The ferric sulfate or the ferrate-containing acid is used as a reaction additive, the mass of the iron element is controlled not to exceed 20 percent (m/m) of the total mass of the aluminum element in the aluminum-containing solid raw material, and the capability of the inorganic polymer sludge conditioner for improving the sludge CST (capillary water absorption time) can be improved to a certain extent. Meanwhile, it should be noted that the inorganic polymer sludge conditioner prepared without introducing the reaction additive in the preparation method can be applied to working conditions with special requirements or conditions (for example, Fe cannot be introduced).
Further, in the step (2), the addition amount of the caustic alkali or the sodium carbonate is 100-180% (m/m) of the mass of the aluminum element in the aluminum-containing solid raw material, and typical addition amount selections including but not limited to 100%, 110%, 120%, 130%, 140%, 150%, 160%, 170%, 180% and the like are included.
In a second aspect, the invention provides an inorganic polymer sludge conditioner prepared by the preparation method, and through detection, the Alb content in the inorganic polymer sludge conditioner is greater than 50% of the total Al content, and the total Alb + Alc content is greater than 80% of the total Al content.
In a third aspect, the invention provides an application of the inorganic polymer sludge conditioner in sludge conditioning.
The application is specifically characterized in that the inorganic polymer sludge conditioner is added into sludge with the water content of 92-99% to improve the dehydration performance of the sludge; the addition amount is preferably 20-50% of the dry solid amount of the sludge.
And (3) performing filter pressing on the conditioned sludge, so that the water content of the sludge can be reduced to below 60%.
The raw materials or reagents involved in the invention are all common commercial products, and the operations involved are all routine operations in the field unless otherwise specified.
The above-described preferred conditions may be combined with each other to obtain a specific embodiment, in accordance with common knowledge in the art.
The invention has the beneficial effects that:
according to the invention, by selecting raw materials and optimizing a preparation process, an inorganic polymer sludge conditioner with the Alb content of more than 50% and the total Alb and Alc content of more than 80% is developed and obtained, and the inorganic polymer sludge conditioner can be used as a sludge conditioner and applied to the field of sludge treatment. The inorganic polymer sludge conditioner has a prefabricated polymerization form, and can be combined with LB-EPS (tightly combined extracellular polymer) outside sludge cells after being added into a sludge system (excess sludge or anaerobic digestion sludge), so that the capillary water absorption time (CST) of the sludge is reduced, and the dehydration performance of the sludge is enhanced. Meanwhile, the inorganic polymer sludge conditioner product is a pure liquid product with moderate pH, and overcomes the defects of the traditional lime plus FeCl3The conditioning process has the problems of large sludge drying and solid increment, strong sludge alkalinity after conditioning and difficult subsequent utilization, and has good popularization and application prospect.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a flow chart of the preparation process of the inorganic polymer sludge conditioner of the present invention.
FIG. 2 is a standard Al-Ferron curve in Experimental example 1 of the present invention.
FIG. 3 is a working curve of the Al-Ferron time-by-time complexation colorimetry in Experimental example 1 of the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in detail with reference to the following examples. It is to be understood that the following examples are given for illustrative purposes only and are not intended to limit the scope of the present invention. Various modifications and alterations of this invention will become apparent to those skilled in the art without departing from the spirit and scope of this invention.
The experimental procedures used in the following examples are all conventional procedures unless otherwise specified.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
Example 1
This example is intended to illustrate the preparation method of the inorganic polymer sludge conditioner and the obtained inorganic polymer sludge conditioner.
As shown in the process flow diagram of fig. 1, the specific preparation method comprises the following steps:
(1) drying industrial aluminum hydroxide (raw material 1) at 120 ℃ for 30 minutes, crushing to 100-mesh and 200-mesh, and adding into a reactor 1;
adding 25% industrial hydrochloric acid (raw material 2) into a reactor 1, wherein the addition amount of the industrial hydrochloric acid is 16 times of the addition amount of aluminum element in the raw material 1;
adding FeCl to reactor 13Ferric sulfate or ferrate-containing acid is taken as a reaction additive, and the adding amount of iron is controlled to be 10 percent (m/m) of the mass of aluminum in the raw material 1;
sealing the reactor 1, heating to 110-130 ℃, and reacting for 2-3 hours; adding the reaction product into a reactor 2;
(2) heating the reactor 2 to 80 ℃, adding caustic alkali (raw material 3) in batches under the condition of continuous heat preservation, wherein the mass of total added sodium element is 140 percent (m/m) of the mass of aluminum element in the aluminum-containing solid raw material, the adding process needs to last for 1.5 hours, and the adding is continuously stirred and reacts for more than 1 hour after the adding is finished; after the reaction is finished, curing for 2 hours at the temperature of more than 60 ℃ to obtain the inorganic polymer sludge conditioner.
Example 2
This example differs from example 1 in that commercial aluminum hydroxide was replaced with bauxite.
Example 3
The difference between this example and example 1 is that the industrial hydrochloric acid was replaced with a mixed acid of industrial hydrochloric acid and sulfuric acid, and the sulfuric acid ratio in the mixed acid was less than 10%. In the reaction step (1), the adding amount of the acid liquor is adjusted to be 18 times of the adding mass of the aluminum element in the raw material 1.
Example 4
This example differs from example 1 in that sodium carbonate was used in place of caustic soda, and the amount of sodium element added was 155% (m/m) based on the mass of aluminum element in the raw material 1.
Example 5
This example differs from example 1 in that in step (1), no FeCl is added to reactor 13And a reaction additive such as ferric sulfate or ferrate, and the other steps are the same as the steps in the example 1.
Comparative example 1
The difference between the comparative example and the example 1 is that in the step (2), the raw material 3 is continuously stirred and reacted for more than 1 hour after being added, the obtained reaction liquid is cooled to below 40 ℃, the reaction liquid is pressed for more than 60 minutes by a mud pump in a diaphragm filter pressing mode to obtain a liquid product, and the liquid product is aged at normal temperature for more than 2 hours (no precipitation occurs), namely the aluminum-based inorganic high polymer material.
Experimental example 1
In this experimental example, the inorganic polymer sludge conditioner prepared in examples 1 to 5 was subjected to an Al-Ferron time-by-time colorimetric method to determine the occurrence of aluminum, and the detection method was as follows:
1) preparation of Ferron colorimetric solution
And mixing the following reagent A, reagent B and reagent C according to the ratio of 2.5:2:1 (adding the reagent A at last) to obtain the Ferron colorimetric solution. The pH of the solution after preparation was about 5.2, and the solution was stored in a refrigerator (4 ℃ C.).
Reagent a [ 0.2% (m/v) Ferron aqueous solution ]: to 1000mL of deionized water boiled and cooled to room temperature was added 2.0g of analytically pure Ferron reagent, the Ferron was dissolved by magnetic stirring, and insoluble impurities were filtered, and then transferred to a 1L volumetric flask for storage in a refrigerator.
Reagent B [ 20% (m/v) NaAc solution ]: 50g of analytically pure anhydrous NaAc is dissolved in a proper amount of deionized water, and the solution is filtered and then transferred into a 250mL volumetric flask to be diluted to a scale mark for constant volume.
Reagent C [ 10% dilute hydrochloric acid ]: 100mL of analytically pure concentrated hydrochloric acid is dissolved in a proper amount of water, and then the solution is transferred into a 1000mL volumetric flask to be diluted to a constant volume of a scale mark.
2) Preparation of standard stock solutions for aluminum
Soaking a certain amount of pure aluminum sheet in dilute hydrochloric acid for 2-4h, taking out, quickly drying with nitrogen, accurately weighing 1.35g (accurate to 0.0002g), adding HCl solution (1:1) for dissolving, and fixing the volume to 500mL, wherein the concentration is 0.1000M.
3) Preparation of Standard Curve
10mL of aluminum stock solution was diluted into a 1.0L volumetric flask to prepare a 10. sup. th concentration-3mol/L Al standard solution. 0.5 mL, 1.0 mL, 1.5 mL, 2.0 mL and 2.5mL of Al standard solution are respectively added into a 25mL colorimetric tube, 5.5mL of colorimetric solution is added, and the absorbance is determined after the volume is constant to 25 mL. The absorbance values of samples with different concentrations at the position of 366nm are plotted into a standard curve, and an Al-Ferron standard curve is shown in figure 2.
4) Time-by-time colorimetric method of Al-Ferron
Adding 5.5mL of prepared Ferron colorimetric solution into a 25mL colorimetric tube, diluting deionized water to a constant volume of 25mL, and adding a trace amount of solution to be detected (the addition amount is related to the total aluminum concentration of the solution to be detected, and the amount of aluminum added into the colorimetric tube is controlled to be 0.5-2.5 x 10-6mol), timing, quickly shaking, placing the cuvette containing the sample in a spectrophotometer, and measuring the absorbance value (i.e. Ala component) at 2 min; the absorbance values (i.e. the components of Ala + Alb) were measured fixed-point at 2 h; the Alc values were calculated as AlT ═ Ala + Alb + Alc. The working curve of the Al-Ferron time-lapse complexation colorimetry is shown in FIG. 3.
According to the above detection method, the inorganic polymer sludge conditioner prepared in examples 1 to 5 was subjected to an Al-Ferron time-by-time colorimetry to measure the occurrence form of aluminum, and the detection results are shown in table 1:
TABLE 1 appearance of aluminum in the inorganic Polymer sludge conditioners prepared in examples 1-5
From the above table it can be seen that the amount of acid, the amount of caustic soda (or sodium carbonate) and whether or not the filter pressing affects the appearance of Al in the final product.
Experimental example 2
The inorganic polymer sludge conditioners prepared in examples 1, 4 and 5, the aluminum-based inorganic polymer material prepared in comparative example 1, and common lime and FeCl were used in this example3As a sludge conditioner, excess sludge with the water content of 95 percent is taken as objects to be treated, and sludge conditioning is respectively carried out, so that the sludge dewatering performance is improved, and the mechanical dewatering effect is improved.
The processing method comprises the following steps:
200mL of sludge sample is taken, the reagents are respectively added in the amount of 2mL, 3mL, 4mL and 5mL for sludge conditioning experiments, and the experimental steps are as follows:
1. stirring the sludge at the speed of 250rmp for 1min, uniformly mixing, and adding a sludge conditioner according to the dosage after stirring is finished;
2. stirring at 40rmp for 20-30 min;
3. detecting the capillary water absorption time (CST) of the mud-water mixture;
4. performing filter pressing dehydration on the mud-water mixture, detecting the water content of a mud cake after filter pressing dehydration, and calculating the dry-solid increase rate;
the test device for filter-pressing dehydration adopts a small filter-pressing device independently developed by Beijing environmental science and technology Limited and simulates plate-and-frame filter press dehydration on sludge by using air pressure, thereby achieving the purpose of deep dehydration of the sludge, wherein the filter-pressing time is 40min, and the pressure is 0.50-0.60 MPa.
The detection method comprises the following steps:
1) capillary Suction Time (CST)
Capillary Suction Time (CST) can test the permeability of free moisture in sludge and can be used as an index for measuring the sludge dewatering characteristics. The test apparatus was measured using CST304B from Triton, England. 5mL of the homogenized sludge was poured into a stainless steel cylinder having a diameter of 18mm, and water was absorbed from the sludge by the capillary suction pressure generated by Whatman filter paper, and the CST value was defined as the time required for the filtrate wetting radius to increase from 1cm to 3 cm. Generally, the larger the value of CST, the worse the sludge dewatering performance.
2) Water content ratio
And calculating the water content by adopting a difference method. Placing the cleaned crucible in an oven at 105 ℃ to be dried to constant weight, and recording the weight of the crucible as G1; placing a certain amount of uniformly mixed sludge sample in a crucible, and recording the weight as G2; after the crucible with the sludge sample was placed in an oven at 105 ℃ to dry for 24 hours, the crucible was taken out and placed in a drying oven to cool to normal temperature, and then weighed and the weight was recorded as G3. The water content is calculated by the following formula:
the water content is (G2-G3)/(G2-G1). times.100%
3) Increase rate of dry solids
And calculating the water content by adopting a difference method. Taking two 100mL evaporation dishes respectively, marking as an evaporation dish 1 and an evaporation dish 2, placing the cleaned 2 evaporation dishes in an oven at 105 ℃ to dry to constant weight, and recording the weight of the evaporation dish 1 as g1 and the weight of the evaporation dish 2 as g 2; 50mL of the uniformly mixed sludge is placed in an evaporation dish 1 as it is, and after being dried in an oven at 105 ℃ for 24 hours, the evaporation dish 1 is taken out and placed in a drying oven to be cooled to the normal temperature, and then weighed and the weight is recorded as g 3. Taking another clean beaker, taking 50mL of uniformly mixed sludge original sample, conditioning according to different conditioning schemes, after filter pressing, transferring all the sludge cakes into an evaporating dish 2 (deionized water can be properly used for cleaning in the transferring process to ensure that all the sludge cakes are transferred into the evaporating dish 2), drying in a drying oven at 105 ℃ for 24 hours, taking out the evaporating dish 1, placing in a drying oven, cooling to the normal temperature, weighing, and recording the dry solid increase rate of g4 according to the calculation formula:
the dry solid increase rate was ((g4-g2)/(g3-g1) -1) × 100%
The results are shown in table 2:
TABLE 2 Effect of different sludge conditioners on sludge dewatering Performance
From the comparison of the above experimental data, it can be seen that:
(1) compared with the traditional lime and FeCl adopted by using the sludge conditioner provided by the invention3The process conditions the sludge, the final dry-solid increase rate of the sludge can be obviously reduced, the dry-solid increase amount of the optimal moisture content group is measured, and the pure liquid scheme is compared with lime and FeCl3According to the scheme, the sludge amount is reduced by more than 24.6%, and the subsequent sludge treatment amount is greatly reduced;
(2) the data show that a great amount of Alb can be combined with LB-EPS, and Alc plays a role in assisting filtration to a certain extent, so that necessary support is provided for mud cake formation, and smooth release of moisture in the filtration process is facilitated, so that the moisture content of the mud cake is reduced.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (9)
1. A preparation method of an inorganic polymer sludge conditioner comprises the following steps:
(1) crushing the aluminum-containing solid raw material to 100-plus-200 meshes, and adding the crushed material into a first reactor;
adding industrial hydrochloric acid or mixed acid of the industrial hydrochloric acid and sulfuric acid into the first reactor, wherein the addition amount of the industrial hydrochloric acid or the mixed acid is 15-20 times of the mass of an aluminum element in the aluminum-containing solid raw material;
sealing the first reactor, heating to 110-130 ℃, and reacting for 2-3 hours;
adding the reaction product into a second reactor;
(2) heating the second reactor to 80 ℃, adding caustic alkali or sodium carbonate in batches under the condition of continuous heat preservation, wherein the mass of the total added sodium element is 100-180% of the mass of the aluminum element in the aluminum-containing solid raw material, the adding process needs to last for 1.5-2 hours, and the adding is continuously stirred and reacts for more than 1 hour after the adding is finished; after the reaction is finished, curing for 2 hours at the temperature of more than 60 ℃ to obtain the inorganic polymer sludge conditioner.
2. The method according to claim 1, wherein in the step (1), when the solid raw material containing aluminum is in a hydrated state, the solid raw material containing aluminum is subjected to a drying treatment to control the water content of the solid raw material containing aluminum to 10% or less.
3. The preparation method according to claim 1, wherein in the step (1), the aluminum-containing solid raw material is selected from one or more of aluminum hydroxide, bauxite and high-alumina fly ash.
4. The production method according to any one of claims 1 to 3, wherein in the step (1), the concentration of the industrial hydrochloric acid is 25%, and the sulfuric acid proportion in the mixed acid of the industrial hydrochloric acid and the sulfuric acid is less than 10%.
5. The method according to any one of claims 1 to 3, wherein in step (1), FeCl is further added to the first reactor3Ferric sulfate or ferrate as reaction additive, and controlling the quality of iron element not to exceed that of aluminum element in the aluminum-containing solid raw material20 percent of the total mass.
6. An inorganic polymer sludge conditioner, characterized by being prepared by the preparation method of any one of claims 1 to 5.
7. The inorganic polymer sludge conditioner according to claim 6, wherein the content of Alb in the inorganic polymer sludge conditioner is more than 50% of the total content of Al, and the total content of Alb + Alc is more than 80% of the total content of Al.
8. The use of the inorganic polymer sludge conditioner of claim 6 or 7 for sludge conditioning.
9. The use of claim 8, wherein the inorganic polymer sludge conditioner is added into the sludge to improve the dehydration performance of the sludge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011021647.4A CN112159071B (en) | 2020-09-25 | 2020-09-25 | Inorganic polymer sludge conditioner and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011021647.4A CN112159071B (en) | 2020-09-25 | 2020-09-25 | Inorganic polymer sludge conditioner and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112159071A true CN112159071A (en) | 2021-01-01 |
| CN112159071B CN112159071B (en) | 2023-04-07 |
Family
ID=73862889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011021647.4A Active CN112159071B (en) | 2020-09-25 | 2020-09-25 | Inorganic polymer sludge conditioner and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112159071B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101691252A (en) * | 2009-09-21 | 2010-04-07 | 同济大学 | Method for preparing double-acid ferro-aluminum flocculating agent |
-
2020
- 2020-09-25 CN CN202011021647.4A patent/CN112159071B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101691252A (en) * | 2009-09-21 | 2010-04-07 | 同济大学 | Method for preparing double-acid ferro-aluminum flocculating agent |
Non-Patent Citations (2)
| Title |
|---|
| BINGDI CAO等: "Wastewater sludge dewaterability enhancement using hydroxyl", 《WATER RESEARCH》 * |
| 穆丹琳等: "污泥调理对给水污泥脱水性能的影响", 《环境工程学报》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112159071B (en) | 2023-04-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111925099B (en) | Inorganic polymer sludge conditioner and preparation method and application thereof | |
| CN1807263A (en) | Method for producing iron oxide black using desilicified mud cake | |
| CN113668060B (en) | Process for continuously preparing semi-hydrated and dihydrate calcium sulfate whiskers by using salt slurry | |
| CN102746196B (en) | Sulfonating technique for producing dye dispersant MF (melamine-formaldehyde) | |
| CN101935866B (en) | Method for preparing flaky calcite calcium carbonate crystal | |
| CN105784696B (en) | The analysis determining method of each valence state sulphur in a kind of sodium aluminate solution | |
| CN106915810B (en) | High-efficiency composite flocculant and preparation method and application thereof | |
| CN112159071B (en) | Inorganic polymer sludge conditioner and preparation method and application thereof | |
| CN112159072A (en) | Inorganic polymer sludge conditioner and preparation method and application thereof | |
| CN112174489B (en) | Inorganic polymer sludge conditioner and preparation method and application thereof | |
| CN112159070B (en) | Inorganic polymer sludge conditioner and preparation method and application thereof | |
| CN102507854A (en) | Diluted hydrochloric acid leaching-EDTA (ethylenediaminetetraacetic acid) volumetric method for determining metal aluminum content in steelmaking exothermic agent | |
| CN112174488B (en) | Inorganic polymer sludge conditioner and preparation method and application thereof | |
| CN105087932B (en) | The preparation method of the minimizing technology of silicon and vanadium oxide in rich acidic vanadium liquid | |
| CN102633335B (en) | Sewage treatment method | |
| CN1687744A (en) | Method for measuring alumina in aluminium fluoride | |
| CN106348466B (en) | A kind of water treatment agent and preparation method thereof | |
| CN112142178B (en) | Inorganic polymer dephosphorizing agent and preparation method and application thereof | |
| CN112142177B (en) | Inorganic polymer dephosphorizing agent and preparation method and application thereof | |
| CN114609338A (en) | Method for detecting activity of red mud | |
| CN114873901A (en) | Preparation method of novel sludge conditioner applied to plate-and-frame filter press | |
| CN112142179B (en) | Inorganic polymer dephosphorizing agent and preparation method and application thereof | |
| CN112683823A (en) | Detection reagent for detecting total nitrogen content in wastewater and preparation method | |
| CN111924950B (en) | Inorganic polymer phosphorus removal agent and preparation method and application thereof | |
| CN112158935A (en) | Inorganic polymer phosphorus removal agent and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yu Hongbo Inventor after: Xu Xuzheng Inventor after: Su Hang Inventor after: Yang Xiaoyin Inventor after: Chen Mingren Inventor before: Yu Hongbo Inventor before: Xu Xuzheng Inventor before: Su Hang Inventor before: Yang Xiaoyin Inventor before: Chen Mingren |
|
| CB03 | Change of inventor or designer information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Room 1129, 10 / F, block a, No. 8 Xueqing Road (Science and technology wealth center), Haidian District, Beijing 100085 Patentee after: Beijing globegroup Zhongke Water Technology Co.,Ltd. Address before: 100086 1205, 12 / F, block a, building 1, yard 10, Xueqing Road, Haidian District, Beijing (Dongsheng District) Patentee before: BEIJING GWATER TECHNOLOGY CO.,LTD. |
|
| CP03 | Change of name, title or address | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230911 Address after: No. 12 Chuangye Road (East), Nangang Industrial Zone, Binhai New Area Development Zone, Tianjin, 300280 Patentee after: Tianjin Ruitian Environmental Protection Technology Co.,Ltd. Address before: Room 1129, 10 / F, block a, No. 8 Xueqing Road (Science and technology wealth center), Haidian District, Beijing 100085 Patentee before: Beijing globegroup Zhongke Water Technology Co.,Ltd. |
|
| TR01 | Transfer of patent right |