CN111170436A - Flocculating agent for treating printing and dyeing sewage and sewage treatment method - Google Patents
Flocculating agent for treating printing and dyeing sewage and sewage treatment method Download PDFInfo
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- CN111170436A CN111170436A CN202010058356.6A CN202010058356A CN111170436A CN 111170436 A CN111170436 A CN 111170436A CN 202010058356 A CN202010058356 A CN 202010058356A CN 111170436 A CN111170436 A CN 111170436A
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- Prior art keywords
- printing
- dyeing
- sewage
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- flocculant
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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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
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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
-
- 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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
-
- 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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
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- 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)
- Analytical Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention relates to a flocculant for treating printing and dyeing sewage and a sewage treatment method, and the flocculant specifically comprises the following raw materials, by weight, 40-50 parts of acrylamide; 10-15 parts of bauxite; 0.2-1.0 part of activated carbon; 3-5 parts of EDTA; catalyst BiVO 4: 0.5 part. The sewage treatment method specifically comprises the following steps: firstly, adjusting the pH value of the printing and dyeing sewage to 6.5-7.5, then adding acrylamide, bauxite, activated carbon, EDTA and a catalyst BiVO4 into the printing and dyeing sewage, stirring the mixture for 2-3 hours, standing the mixture for 12 hours until the mixture is layered, and pumping out the sludge by using a sludge pump. The invention promotes the sedimentation of macromolecular substances in the printing and dyeing wastewater, effectively improves the separation rate of sludge and wastewater, and has the advantages of quick sedimentation effect, small dosage and convenient use.
Description
Technical Field
The invention belongs to the field of sewage treatment, and particularly relates to a flocculant for treating printing and dyeing sewage and a sewage treatment method.
Background
China is the biggest textile garment production and export country in the world, so the printing and dyeing industry is closely related to the China, the waste water discharge of the printing and dyeing industry is one of the key industries causing water pollution in China, and compared with other industries, the printing and dyeing waste water has the characteristics of large waste water discharge amount, deep color, high content of organic matters difficult to degrade, unstable water quality and the like.
Aiming at the treatment problem of the printing and dyeing wastewater, the existing treatment technology mainly treats the printing and dyeing wastewater through physicochemical treatment and biochemical treatment in sequence, so that harmful substances are degraded and the emission standard is reached. Aiming at the physical and chemical treatment of the prior printing and dyeing wastewater, the prior physical and chemical treatment process is basically completed by manual operation of an operator. The method comprises the steps of firstly introducing the printing and dyeing wastewater into a pool, wherein the pH value of the printing and dyeing wastewater is uncertain, so that the pH value is generally adjusted to be alkaline by lime, then adding ferrous sulfate to carry out flocculation precipitation treatment on the wastewater, standing and layering, discharging sludge by a sludge pump, and carrying out next-step treatment on the upper-layer wastewater. However, in a printing and dyeing mill, desizing treatment needs to be carried out on cloth before printing and dyeing, at present, starch is mainly used for sizing yarns, other raw materials are added, and polyvinyl alcohol is added, so that starch forms paste when encountering strong alkali in the alkali boiling desizing process at high temperature; therefore, the printing and dyeing slurry wastewater contains a large amount of macromolecular substances such as starch, saccharides, glue, PVA polymer macromolecules and the like which swell in water, has great water absorption and stickiness, and seriously influences the flocculation and precipitation of sludge; the treatment time of the printing and dyeing wastewater is prolonged.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a flocculating agent for treating printing and dyeing sewage and a sewage treatment method.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the first technical scheme is as follows:
a flocculant for treating printing and dyeing sewage comprises the following raw materials in parts by weight,
further, the flocculating agent for treating the printing and dyeing sewage also comprises 20-40 parts of magnetized ceramic particles.
Further, the magnetized ceramic particles comprise the following raw materials in parts by weight: 60-80 parts of ceramic blank; and 20-30 parts of magnetizable materials.
Still further, the magnetizable material is selected from metals or metal oxides or salts containing iron, cobalt, nickel, manganese, strontium magnetic elements.
Still further, the magnetizable material is formed from SrCO3And MnO2Is compounded according to the mass ratio of 1: 5.
Further, the ceramic blank adopts Pb3O4。
Further, the preparation method of the magnetized ceramic particles comprises the following steps:
step 1, ball milling: firstly, uniformly mixing a magnetizable material and a ceramic blank, and adding deionized water according to the material-liquid ratio of 1: 30; the ball milling time is 3-5 h, and the ceramic slurry A is obtained after 40-60 mesh sieve sieving;
step 2, pre-burning: drying the ceramic slurry A at 110-130 ℃, crushing, sieving with a 40-60 mesh sieve, heating to 1000-1200 ℃ at the speed of 2 ℃/min, preserving heat for 2-4 h, and cooling to obtain a pre-sintered material;
and 3, ball milling again: mixing the pre-sintered material with deionized water according to the material-liquid ratio of 1:30, and performing ball milling for 4 hours again to obtain ceramic slurry B; the rotating speed of the ball mill is 550 r/min;
and 4, granulating: drying the ceramic slurry B at 110-130 ℃, crushing, sieving with a 40-60-mesh sieve, adding a sodium carbonate solution according to the mass ratio of 100: 3-9 of the ceramic slurry B to the sodium carbonate solution, uniformly mixing, and granulating to obtain wet ceramic particles;
and step 5, sintering: spraying a layer of silicon dioxide powder on the surface of the ceramic wet grain, then placing the ceramic wet grain in a furnace, heating to 1200-1300 ℃ at the speed of 2.3-2.8 ℃/min, preserving the heat for 2-4 h, and cooling along with the furnace to obtain the ceramic grain.
The second technical scheme is as follows:
a method for sewage treatment by using the flocculant specifically comprises the following steps:
firstly, adjusting the pH value of the printing and dyeing sewage to 6.5-7.5, and adding acrylamide, bauxite, active carbon, EDTA and a catalyst BiVO into the printing and dyeing sewage according to the mass ratio of the material liquid of 0.05:10004And stirring for 2-3 h, standing for 12h until layering, and pumping out sludge by using a sludge pump.
The third technical scheme is as follows:
a method for sewage treatment by using the flocculant specifically comprises the following steps: firstly, adjusting the pH value of the printing and dyeing sewage to 6.5-7.5, and adding the printing and dyeing sewage into the printing and dyeing sewage according to the feed liquid mass ratio of 0.05:1000Adding acrylamide, bauxite, active carbon, EDTA and a catalyst BiVO4Then arranging a placing plate with holes below the liquid level of the middle upper part of the printing and dyeing sewage, placing the magnetic ceramics on the placing plate, then placing the printing and dyeing sewage in a strong magnetic environment, stirring for 2-3 h, standing for 1h until layering, and pumping out sludge by a sludge pump.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts acrylamide, magnetized ceramic particles, bauxite, active carbon and EDTA, and flocculates the printing and dyeing wastewater under a neutral condition to reduce the gelatinization rate of starch in the wastewater, wherein the active carbon has an adsorption effect on harmful substances in the wastewater, the EDTA can chelate heavy metal ions in the printing and dyeing wastewater, and the bauxite, the acrylamide and a catalyst BiVO4The sedimentation of macromolecular substances such as polyvinyl alcohol and starch in the printing and dyeing wastewater can be promoted by the combined action, the separation rate of sludge and wastewater is effectively improved, the sedimentation effect is fast, the dosage is small, and the use is convenient.
2. The invention promotes the flocculation and precipitation of various substances in the sewage by arranging the magnetic ceramic, placing the printing and dyeing sewage in a strong magnetic field environment and carrying out magnetization treatment on the sewage by using a magnetic field, and in addition, in the process of manufacturing ceramic wet granules, a sodium carbonate solution is adopted as a wetting agent, and the prepared magnetic ceramic is in a porous structure by using the action of carbon dioxide released by high-temperature decomposition of sodium carbonate, and in the sewage treatment process, SrCO in the magnetic ceramic3Slowly released into the sewage, and the polymer is used as a magnetic material and a catalyst for catalyzing the sedimentation of mucilaginous macromolecular substances such as starch and the like to promote the flocculation of the starch in the sewage; the invention utilizes the SrCO which uses the magnetic field and the magnetic material as the catalyst3Greatly improves the flocculation efficiency of the sewage, shortens the standing and layering time of the sludge and the wastewater from 12 hours to 1 hour, and greatly shortens the standing and layering time of the sludge and the wastewater.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1
A flocculant for treating printing and dyeing sewage comprises the following raw materials in parts by weight,
the magnetized ceramic particles comprise the following raw materials in parts by weight: ceramic blank Pb3O4: 70 parts of (B); magnetizable material SrCO3: 4.5 parts; magnetizable material MnO2: 22.5 parts;
the preparation method of the magnetized ceramic particles comprises the following steps:
step 1, ball milling: firstly, uniformly mixing a magnetizable material and a ceramic blank, and adding deionized water according to the material-liquid ratio of 1: 30; the ball milling time is 4h, and the ceramic slurry A is obtained after the ball milling is carried out by a 50-mesh sieve;
step 2, pre-burning: drying the ceramic slurry A at 120 ℃, crushing, sieving by a 50-mesh sieve, heating to 1100 ℃ at the speed of 2 ℃/min, preserving heat for 3 hours, and cooling to obtain a pre-sintered material;
and 3, ball milling again: mixing the pre-sintered material with deionized water according to the material-liquid ratio of 1:30, and performing ball milling for 4 hours again to obtain ceramic slurry B; the rotating speed of the ball mill is 550 r/min;
and 4, granulating: drying the ceramic slurry B at 120 ℃, crushing, sieving with a 50-mesh sieve, adding a sodium carbonate solution according to the mass ratio of the ceramic slurry B to the sodium carbonate solution of 100:6, uniformly mixing, and granulating to obtain ceramic wet particles;
and step 5, sintering: spraying a layer of silicon dioxide powder on the surface of the ceramic wet grain, then placing the ceramic wet grain in a furnace, heating to 1250 ℃ at the speed of 2.3-2.8 ℃/min, preserving heat for 3h, and cooling along with the furnace to obtain the ceramic grain.
A method for treating sewage by using the flocculant comprises the following steps:
firstly, adjusting the pH value of the printing and dyeing sewage to 6.5-7.5, and adding acrylamide, bauxite, active carbon, EDTA and a catalyst BiVO into the printing and dyeing sewage according to the mass ratio of the material liquid of 0.05:10004Then arranging a storage plate with holes below the liquid level of the middle upper part of the printing and dyeing sewage, and placing the magnetic ceramics on the storage plateAnd then placing the printing and dyeing sewage in a strong magnetic environment, stirring for 2-3 h, standing for 1h until layering, and pumping out the sludge by using a sludge pump.
Example 2
A flocculant for treating printing and dyeing sewage comprises the following raw materials in parts by weight,
the magnetized ceramic particles comprise the following raw materials in parts by weight: the same as in example 1.
The preparation method of the magnetized ceramic particles comprises the following steps: the same as in example 1.
A method for treating sewage by using the flocculant comprises the following steps: same as example 1
Example 3
A flocculant for treating printing and dyeing sewage comprises the following raw materials in parts by weight,
the magnetized ceramic particles comprise the following raw materials in parts by weight: the same as in example 1.
The preparation method of the magnetized ceramic particles comprises the following steps: the same as in example 1.
A method for treating sewage by using the flocculant comprises the following steps: the same as in example 1.
Example 4
A flocculant for treating printing and dyeing sewage comprises the following raw materials in parts by weight,
a method for treating sewage by using the flocculant comprises the following steps:
firstly, adjusting the pH value of the printing and dyeing sewage to 6.5-7.5, and adding acrylamide, bauxite, active carbon, EDTA and a catalyst BiVO into the printing and dyeing sewage according to the mass ratio of the material liquid of 0.05:10004Stirring for 2-3 h, and standingAfter 12h to layering, pumping out the sludge by a sludge pump.
Effect example 1
After the printing and dyeing sewage is treated by the flocculating agent in each embodiment, the index detection result of the upper layer wastewater is obtained and is shown in the following table:
the embodiments described above are only preferred embodiments of the invention and are not exhaustive of the possible implementations of the invention. Any obvious modifications to the above would be obvious to those of ordinary skill in the art, but would not bring the invention so modified beyond the spirit and scope of the present invention.
Claims (8)
1. The flocculant for treating printing and dyeing sewage is characterized by comprising the following raw materials in parts by weight,
2. the flocculant for treating printing and dyeing wastewater according to claim 1, further comprising 20 to 40 parts of magnetized ceramic particles.
3. The flocculant for treating printing and dyeing wastewater according to claim 2, characterized in that the magnetized ceramic particles comprise the following raw materials in parts by weight: 60-80 parts of ceramic blank; and 20-30 parts of magnetizable materials.
4. The flocculant for treating printing and dyeing wastewater according to claim 3, wherein the magnetizable material is selected from metals or metal oxides or salts containing magnetic elements of iron, cobalt, nickel, manganese and strontium.
5. A process according to claim 3The flocculant for printing and dyeing sewage is characterized in that Pb is adopted as the ceramic blank3O4。
6. The flocculant for treating printing and dyeing wastewater according to claim 2, characterized in that the magnetized ceramic particles are prepared by the following steps:
step 1, ball milling: firstly, uniformly mixing a magnetizable material and a ceramic blank, and adding deionized water according to the material-liquid ratio of 1: 30; the ball milling time is 3-5 h, and the ceramic slurry A is obtained after 40-60 mesh sieve sieving;
step 2, pre-burning: drying the ceramic slurry A at 110-130 ℃, crushing, sieving with a 40-60 mesh sieve, heating to 1000-1200 ℃ at the speed of 2 ℃/min, preserving heat for 2-4 h, and cooling to obtain a pre-sintered material;
and 3, ball milling again: mixing the pre-sintered material with deionized water according to the material-liquid ratio of 1:30, and performing ball milling for 4 hours again to obtain ceramic slurry B; the rotating speed of the ball mill is 550 r/min;
and 4, granulating: drying the ceramic slurry B at 110-130 ℃, crushing, sieving with a 40-60-mesh sieve, adding a sodium carbonate solution according to the mass ratio of 100: 3-9 of the ceramic slurry B to the sodium carbonate solution, uniformly mixing, and granulating to obtain wet ceramic particles;
and step 5, sintering: spraying a layer of silicon dioxide powder on the surface of the ceramic wet grain, then placing the ceramic wet grain in a furnace, heating to 1200-1300 ℃ at the speed of 2.3-2.8 ℃/min, preserving the heat for 2-4 h, and cooling along with the furnace to obtain the ceramic grain.
7. A method for sewage treatment by using the flocculant of claim 1, which is characterized by comprising the following steps:
firstly, adjusting the pH value of the printing and dyeing sewage to 6.5-7.5, and adding acrylamide, bauxite, active carbon, EDTA and a catalyst BiVO into the printing and dyeing sewage according to the mass ratio of the material liquid of 0.05:10004And stirring for 2-3 h, standing for 12h until layering, and pumping out sludge by using a sludge pump.
8. A method for sewage treatment by using the flocculant of claim 2 to 6, which comprisesIs characterized by comprising the following steps: firstly, adjusting the pH value of the printing and dyeing sewage to 6.5-7.5, and adding acrylamide, bauxite, active carbon, EDTA and a catalyst BiVO into the printing and dyeing sewage according to the mass ratio of the material liquid of 0.05:10004And then arranging a storage plate with holes below the liquid level of the middle upper part of the printing and dyeing sewage, placing the magnetic ceramic on the storage plate, then placing the printing and dyeing sewage in a strong magnetic environment, stirring for 2-3 hours, standing for 1 hour until layering, and pumping out sludge by using a sludge pump.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010058356.6A CN111170436A (en) | 2020-01-18 | 2020-01-18 | Flocculating agent for treating printing and dyeing sewage and sewage treatment method |
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| CN202010058356.6A CN111170436A (en) | 2020-01-18 | 2020-01-18 | Flocculating agent for treating printing and dyeing sewage and sewage treatment method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220080383A1 (en) * | 2020-09-15 | 2022-03-17 | Dalian Maritime University | Method and reactor for separating and removing heavy metals from wastewater using sulfhydryl-modified nano-magnetized activated carbon |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220080383A1 (en) * | 2020-09-15 | 2022-03-17 | Dalian Maritime University | Method and reactor for separating and removing heavy metals from wastewater using sulfhydryl-modified nano-magnetized activated carbon |
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