CN112723506B - Method for sewage treatment by using biological flocculant - Google Patents
Method for sewage treatment by using biological flocculant Download PDFInfo
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- CN112723506B CN112723506B CN202011426746.0A CN202011426746A CN112723506B CN 112723506 B CN112723506 B CN 112723506B CN 202011426746 A CN202011426746 A CN 202011426746A CN 112723506 B CN112723506 B CN 112723506B
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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
- 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
- C02F1/52—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
- C02F1/56—Macromolecular compounds
Abstract
The invention discloses a method for sewage treatment by using a biological flocculant, which comprises the following steps: A. preparing a biological flocculant; mixing 25-35 parts of polymeric ferric sulfate, 3-5 parts of sodium silicate and 10-15 parts of chitosan to prepare a component A; mixing 40-50 parts of corncob powder, 10-15 parts of activated carbon particles, 20-30 parts of walnut shell powder, 5-10 parts of potato starch and 3-5 parts of sodium hexadecyl sulfonate to prepare a component B; B. adding the component A into the sewage to be treated, wherein the adding amount of the component A is 0.1-0.2 kg/ton, fully stirring, standing, removing precipitates, and taking supernatant; C. and C, adding the component B into the supernatant obtained in the step B, wherein the adding amount of the component B is 0.1-0.4 kg/ton, fully stirring, and filtering the water body by using a filter press to obtain a mud cake. The invention can improve the defects of the prior art and improve the comprehensive flocculation efficiency of the biological flocculant.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a method for treating sewage by using a biological flocculant.
Background
With the increasing of environmental protection in China, how to rapidly and efficiently treat sewage becomes one of the research hotspots in the field. Flocculating agents are generally used for coagulating and adsorbing pollutants in sewage in the process of sewage treatment. The biological flocculant is a flocculant prepared by using biological materials, and is widely used in recent years by virtue of the characteristics of low cost, no toxicity, no secondary pollution and the like. However, the comprehensive flocculation efficiency of the biological flocculant is not high, so that the usage amount is relatively large.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for sewage treatment by using a biological flocculant, which can solve the defects of the prior art and improve the comprehensive flocculation efficiency of the biological flocculant.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows.
A method of sewage treatment using a bioflocculant, comprising the steps of:
the following parts are parts by mass;
A. preparing a biological flocculant;
mixing 25-35 parts of polymeric ferric sulfate, 3-5 parts of sodium silicate and 10-15 parts of chitosan to prepare a component A;
mixing 40-50 parts of corncob powder, 10-15 parts of activated carbon particles, 20-30 parts of walnut shell powder, 5-10 parts of potato starch and 3-5 parts of sodium hexadecyl sulfonate to prepare a component B;
B. adding the component A into the sewage to be treated, wherein the adding amount of the component A is 0.1-0.2 kg/ton, fully stirring, standing, removing precipitates, and taking supernatant;
C. and C, adding the component B into the supernatant obtained in the step B, wherein the adding amount of the component B is 0.1-0.4 kg/ton, fully stirring, and filtering the water body by using a filter press to obtain a mud cake.
Preferably, the corncob meal is processed by the steps of,
a1, crushing the corncobs, and filtering the crushed corncobs through a 120-mesh filter sieve;
a2, washing the corncob meal by using a 15wt% sulfuric acid solution, and then stirring and drying the corncob meal in an environment of 55 ℃ for later use.
Preferably, in step A2, activated carbon particles to be used are added, mixed, washed and dried.
Preferably, the processing step of the walnut shell powder is that the walnut shell is crushed, and the crushed corncob is filtered by a filter sieve of 200 meshes.
Preferably, the pressure filter includes the main part, be provided with the slide rail in the main part, slidable mounting has a plurality of filter-pressing frame on the slide rail, the filter plate is installed to filter-pressing frame both sides, the drive roller is installed at filter-pressing frame's top, the drive roller is connected with driving motor, the guide roll is installed to filter-pressing frame's bottom, the filter cloth has been cup jointed to the drive roller and the guide roll outside, filter cloth clearance mechanism is installed to filter-pressing frame's bottom, be connected with flexible chain between the adjacent filter-pressing frame, the one end of slide rail is provided with the hydro-cylinder, the hydro-cylinder is connected with nearest filter-pressing frame.
Preferably, the filter cloth cleaning mechanism comprises a base plate, wherein two rows of pointed end scrapers are fixed on the surface of the base plate and are arranged in a staggered mode, pointed ends of the pointed end scrapers face towards the filter cloth, a row of first through holes parallel to the pointed end scrapers are formed in the base plate, and the first through holes are located between the two rows of pointed end scrapers.
Preferably, an adjusting bolt is installed at one end of the base plate, a shaft sleeve is movably sleeved at the top of the adjusting bolt, a shaft rod is fixed on the shaft sleeve, a pressing roller is sleeved on the outer side of the shaft rod, tapered portions are uniformly arranged on the surface of the pressing roller, rubber pressing rollers are respectively fixed at two ends of the pressing roller, and the pressing roller presses the filter cloth on the guide roller.
Preferably, the pointed scraper comprises a bottom plate, a top plate is inserted into the top of the bottom plate in a sliding mode, the bottom plate is connected with the top plate through a spring, the pointed end of the top plate is located on the outer side of the pointed end of the bottom plate in the initial state, and a knife edge portion is arranged at the pointed end of the bottom plate.
Preferably, the top of the bottom plate is provided with a sliding groove, the top plate is inserted in the sliding groove in a sliding mode, the bottom of the sliding groove is fixedly provided with an elastic sheet, and the top plate is matched with the elastic sheet in a compression mode.
Preferably, the base plate is fixed to the base plate by fixing bolts.
Adopt the beneficial effect that above-mentioned technical scheme brought to lie in: the invention improves the existing bioflocculant, adopts a two-component feeding mode, firstly deposits large-particle impurities such as silt and the like in the water body through the component A, reduces the consumption of the large-particle impurities on effective components in the component B, then secondarily purifies the water body by using the component B, and simultaneously filters to obtain mud cakes for recycling. In addition, the corncob powder and the activated carbon particles are subjected to acid washing, so that the adsorption surface area of the corncob powder and the activated carbon particles can be increased, and the adsorption flocculation effect is improved. Because the invention uses a large amount of biological materials such as corncob powder, potato starch and the like, sediment is easy to adhere to the surface of the filter cloth when filter pressing is carried out on the mud cake, so that the filter cloth is blocked. In order to solve this problem, the invention is specifically improved for a filter press for filter pressing of a cake. The filter cloth of the filter press is sleeved on the driving roller and the guide roller, and after filter pressing operation is finished each time, the driving roller is driven by the driving motor to rotate, so that the filter cloth synchronously carries out circulating movement, on one hand, discharge of mud cakes is facilitated, and in addition, the filter cloth cleaning mechanism utilizes movement of the filter cloth to clean residual sludge on the surface of the filter cloth, so that the cleanliness of the surface of the filter cloth is maintained, and the use times of the filter cloth are increased. Filter cloth clearance mechanism adopts crisscross tip scraper blade that sets up to scrape the clearance to the filter cloth surface, and when filtering the water next time, the rivers that flow through the pressure filter can carry out effectual washing to filter cloth clearance mechanism to avoid mud solidification to lead to the scraping effect to reduce on the tip scraper blade. The first through hole between two lines of tip scrapers is used for discharging water flow and guiding the water flow, so that the effect of flushing the tip scrapers by the water flow is improved. Through adjusting the position at compression roller both ends, can adjust the crimping state of compression roller and filter cloth, guarantee the good laminating of filter cloth and guide roll to avoid the tip scraper blade scratch filter cloth when can making the tip scraper blade carry out abundant scraping to the filter cloth surface. The tip scraper blade adopts bilayer structure, scrapes the filter cloth through the roof under the normal condition to play the purpose of protection filter cloth, when the difficult clearance of the surperficial residue of filter cloth, the scraping resistance increases, and the roof is pushed away the back gradually, makes the most advanced and the residue contact of bottom plate, thereby utilizes cutting edge portion to clear up the residue, in order to guarantee the clearance effect. The top plate installed through the elastic pieces can be tightly attached to the surface of the filter cloth, so that not only can the height change be automatically carried out according to the change of the surface of the filter cloth, but also the filter cloth can be pressed and positioned. The tip scraper blade passes through fixing bolt to be fixed on the base plate, can select the mounting height (increase or reduce the gasket) and the installation angle (the orientation angle of having adjusted the tip scraper blade before the locking) of tip scraper blade in a flexible way as required to realize nimble various scraping effect.
Drawings
Fig. 1 is a structural view of a filter press according to an embodiment of the present invention.
Fig. 2 is a structural view of a filter cloth cleaning mechanism in one embodiment of the present invention.
FIG. 3 is a block diagram of a tip scraper in accordance with one embodiment of the present invention.
Fig. 4 is a top view of fig. 3.
Detailed Description
Example 1
The domestic sewage collected from the second sewage treatment plant in the Zhengzhou aviation harbor district is treated by the following method.
The following parts are parts by mass;
A. preparing a biological flocculant;
mixing 25 parts of polymeric ferric sulfate, 3 parts of sodium silicate and 12 parts of chitosan to prepare a component A;
mixing 45 parts of corncob meal, 10 parts of activated carbon particles, 30 parts of walnut shell powder, 5 parts of potato starch and 5 parts of sodium hexadecyl sulfonate to prepare a component B;
B. adding the component A into the sewage to be treated, wherein the adding amount of the component A is 0.12 kg/ton, fully stirring, standing, removing precipitates, and taking supernatant;
C. and C, adding the component B into the supernatant obtained in the step B, wherein the adding amount of the component B is 0.2 kg/ton, fully stirring, and filtering the water body by using a filter press to obtain a mud cake.
The processing steps of the corncob meal are as follows,
a1, crushing the corncobs, and filtering the crushed corncobs through a 120-mesh filter sieve;
a2, washing the corncob meal by using a 15wt% sulfuric acid solution, and then stirring and drying the corncob meal in an environment of 55 ℃ for later use.
In step A2, activated carbon particles to be used are added, mixed, washed and dried.
The processing steps of the walnut shell powder are that the walnut shell is crushed, and the crushed corncob is filtered by a 200-mesh filter sieve.
The water quality before and after treatment is compared as follows:
| chroma (dilution multiple) | Turbidity (NTU) | COD(mg/L) | |
| Before treatment | 283 | 133 | 5321 |
| After treatment | 32 | 15 | 456 |
。
Example 2
The industrial sewage collected from double bridge sewage treatment plant in Zhengzhou city is treated by the following method.
The following parts are parts by mass;
A. preparing a biological flocculant;
mixing 30 parts of polymeric ferric sulfate, 5 parts of sodium silicate and 10 parts of chitosan to prepare a component A;
mixing 40 parts of corncob meal, 15 parts of activated carbon particles, 30 parts of walnut shell powder, 5 parts of potato starch and 3 parts of sodium hexadecyl sulfonate to prepare a component B;
B. adding the component A into the sewage to be treated, wherein the adding amount of the component A is 0.2 kg/ton, fully stirring, standing, removing precipitates, and taking supernatant;
C. and C, adding the component B into the supernatant obtained in the step B, wherein the adding amount of the component B is 0.2 kg/ton, fully stirring, and filtering the water body by using a filter press to obtain a mud cake.
The processing steps of the corncob meal are as follows,
a1, crushing the corncobs, and filtering the crushed corncobs through a 120-mesh filter sieve;
a2, washing the corncob meal by using a 15wt% sulfuric acid solution, and then stirring and drying the corncob meal in an environment of 55 ℃ for later use.
In step A2, activated carbon particles to be used are added, mixed, washed and dried.
The processing steps of the walnut shell powder are that the walnut shell is crushed, and the crushed corncob is filtered by a 200-mesh filter sieve.
The water quality before and after treatment is compared as follows:
| chroma (dilution multiple) | Turbidity (NTU) | COD(mg/L) | |
| Before treatment | 522 | 121 | 6441 |
| After treatment | 39 | 14 | 488 |
。
Referring to fig. 1-4, the pressure filter includes main part 1, be provided with slide rail 2 in the main part 1, slidable mounting has a plurality of filter-pressing frame 3 on slide rail 2, filter plate 4 is installed to filter-pressing frame 3 both sides, drive roller 5 is installed at filter-pressing frame 3's top, drive roller 5 is connected with driving motor 6, guide roll 7 is installed to filter-pressing frame 3's bottom, drive roller 5 and the 7 outsides of guide roll have cup jointed filter cloth 8, filter cloth clearance mechanism 9 is installed to filter-pressing frame 3's bottom, be connected with flexible chain 10 between the adjacent filter-pressing frame 3, the one end of slide rail 2 is provided with hydro-cylinder 11, hydro-cylinder 11 is connected with nearest filter-pressing frame 3. The filter cloth cleaning mechanism 9 comprises a base plate 12, two rows of pointed end scraping plates 13 are fixed on the surface of the base plate 12, the two rows of pointed end scraping plates 13 are arranged in a staggered mode, pointed ends of the pointed end scraping plates 13 face the filter cloth 8, a row of first through holes 14 parallel to the pointed end scraping plates 13 are formed in the base plate 12, and the first through holes 14 are located between the two rows of pointed end scraping plates 13. Adjusting bolt 15 is installed to the one end of base plate 12, and adjusting bolt 15 top activity cup joints axle sleeve 16, is fixed with axostylus axostyle 17 on the axle sleeve 16, and the axostylus axostyle 17 outside cup joints compression roller 15, and compression roller 15 surface evenly is provided with toper portion 16, and the both ends of compression roller 15 are fixed with rubber pinch roller 18 respectively, and compression roller 15 is with filter cloth 8 pressfitting on guide roll 7. The pointed scraper 13 comprises a bottom plate 19, a top plate 20 is inserted into the top of the bottom plate 19 in a sliding mode, the bottom plate 19 is connected with the top plate 20 through a spring 21, the tip of the top plate 20 is located on the outer side of the tip of the bottom plate 19 in the initial state, and a knife edge portion 22 is arranged at the tip of the bottom plate 19. The top of the bottom plate 19 is provided with a sliding groove 23, the top plate 20 is inserted in the sliding groove 23 in a sliding mode, the bottom of the sliding groove 23 is fixedly provided with an elastic sheet 24, and the top plate 20 is in press fit with the elastic sheet 24. The base plate 19 is fixed to the base plate 12 by fixing bolts 25.
The top plate 20 is provided with a plurality of second through holes 26, the bottom plate 19 is provided with a diversion trench 27, and when water flows through the tip scraper 13, the second through holes 26 and the diversion trench 27 can conduct the water flow, so that the water flow can fully wash the inside of the tip scraper 13.
The diversion groove 27 is communicated with the knife edge part 22, and an inclined groove 28 is arranged at the communication part of the diversion groove 27 and the knife edge part 22. Through setting up the remaining guiding gutter 27 intercommunication of inclined plane groove 28 with cutting edge portion 22, not only can further improve the effect that rivers washed, more importantly when cutting edge portion 22 cuts the residue, discharge cutting edge portion 22 fast with the cutting through inclined plane groove 28 to guarantee the good cutting effect of cutting edge portion 22.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A method for sewage treatment using a bioflocculant, comprising the steps of:
the following parts are parts by mass;
A. preparing a biological flocculant;
mixing 25-35 parts of polymeric ferric sulfate, 3-5 parts of sodium silicate and 10-15 parts of chitosan to prepare a component A;
mixing 40-50 parts of corncob powder, 10-15 parts of activated carbon particles, 20-30 parts of walnut shell powder, 5-10 parts of potato starch and 3-5 parts of sodium hexadecyl sulfonate to prepare a component B;
B. adding the component A into the sewage to be treated, wherein the adding amount of the component A is 0.1-0.2 kg/ton, fully stirring, standing, removing precipitates, and taking supernatant;
C. b, adding the component B into the supernatant obtained in the step B, wherein the adding amount of the component B is 0.1-0.4 kg/ton, fully stirring, and filtering the water body by using a filter press to obtain a mud cake;
the filter press comprises a main body (1), a slide rail (2) is arranged on the main body (1), a plurality of filter press frames (3) are slidably mounted on the slide rail (2), filter plates (4) are mounted on two sides of the filter press frames (3), a driving roller (5) is mounted at the top of each filter press frame (3), the driving roller (5) is connected with a driving motor (6), a guide roller (7) is mounted at the bottom of each filter press frame (3), filter cloth (8) is sleeved on the outer sides of the driving roller (5) and the guide roller (7), a filter cloth cleaning mechanism (9) is mounted at the bottom of each filter press frame (3), a flexible chain (10) is connected between every two adjacent filter press frames (3), an oil cylinder (11) is arranged at one end of the slide rail (2), and the oil cylinder (11) is connected with the nearest filter press frame (3); the filter cloth cleaning mechanism (9) comprises a base plate (12), two rows of pointed end scrapers (13) are fixed on the surface of the base plate (12), the two rows of pointed end scrapers (13) are arranged in a staggered mode, the pointed ends of the pointed end scrapers (13) face the filter cloth (8), a row of first through holes (14) parallel to the pointed end scrapers (13) are formed in the base plate (12), and the first through holes (14) are located between the two rows of pointed end scrapers (13); an adjusting bolt (15) is installed at one end of the base plate (12), a shaft sleeve (16) is movably sleeved at the top of the adjusting bolt (15), a shaft rod (17) is fixed on the shaft sleeve (16), a press roller is sleeved on the outer side of the shaft rod (17), conical parts are uniformly arranged on the surface of the press roller, rubber press rollers (18) are respectively fixed at two ends of the press roller, and the press roller presses the filter cloth (8) on the guide roller (7); the pointed-end scraper (13) comprises a bottom plate (19), a top plate (20) is inserted into the top of the bottom plate (19) in a sliding mode, the bottom plate (19) is connected with the top plate (20) through a spring (21), the tip of the top plate (20) is located on the outer side of the tip of the bottom plate (19) in an initial state, and a knife edge part (22) is arranged at the tip of the bottom plate (19); the top plate (20) is provided with a plurality of second through holes (26), and the bottom plate (19) is provided with a diversion trench (27).
2. The method of sewage treatment using bioflocculants according to claim 1, wherein: the processing steps of the corncob meal are as follows,
a1, crushing the corncobs, and filtering the crushed corncobs through a 120-mesh filter sieve;
a2, washing the corncob meal by using a 15wt% sulfuric acid solution, and then stirring and drying the corncob meal in an environment of 55 ℃ for later use.
3. The method of sewage treatment using bioflocculants according to claim 2, wherein: in step A2, activated carbon particles to be used are added, mixed, washed and dried.
4. The method of sewage treatment using bioflocculants according to claim 1, wherein: the processing step of the walnut shell powder is that the walnut shell is crushed, and the crushed walnut shell is filtered by a 200-mesh filter screen.
5. The method of sewage treatment using bioflocculants according to claim 1, wherein: the top of the bottom plate (19) is provided with a sliding groove (23), the top plate (20) is inserted in the sliding groove (23) in a sliding mode, an elastic sheet (24) is fixed to the bottom of the sliding groove (23), and the top plate (20) is in compression joint with the elastic sheet (24).
6. The method of sewage treatment using bioflocculants according to claim 5, wherein: the bottom plate (19) is fixed on the base plate (12) through a fixing bolt (25).
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| CN202011426746.0A CN112723506B (en) | 2020-12-09 | 2020-12-09 | Method for sewage treatment by using biological flocculant |
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| CN112723506B true CN112723506B (en) | 2022-02-18 |
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| US4166034A (en) * | 1978-05-08 | 1979-08-28 | Bodine Albert G | Method and apparatus for sonically dehydrating precipitate |
| CN100999351A (en) * | 2006-12-29 | 2007-07-18 | 大连海事大学 | Compound flocculating agent used for treating red tide organisms and its preparation method |
| CN102133492A (en) * | 2011-02-28 | 2011-07-27 | 昆山兆年涂装科技有限责任公司 | Filter press |
| CN105540805A (en) * | 2015-12-08 | 2016-05-04 | 甘肃省建材科研设计院 | Potato starch waste water macro-molecule organic matter separation treatment special-purpose flocculating agent |
| CN205199092U (en) * | 2015-11-20 | 2016-05-04 | 四川北方硝化棉股份有限公司 | Mud area is mud scraper blade for filter |
| CN110143627A (en) * | 2019-07-04 | 2019-08-20 | 李洪 | A kind of city domestic sewage inorganic agent and sewage treatment process |
| CN111544944A (en) * | 2020-05-23 | 2020-08-18 | 李玲玲 | Rolling belt type dehydrator capable of automatically adjusting tension of filter cloth |
-
2020
- 2020-12-09 CN CN202011426746.0A patent/CN112723506B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4166034A (en) * | 1978-05-08 | 1979-08-28 | Bodine Albert G | Method and apparatus for sonically dehydrating precipitate |
| CN100999351A (en) * | 2006-12-29 | 2007-07-18 | 大连海事大学 | Compound flocculating agent used for treating red tide organisms and its preparation method |
| CN102133492A (en) * | 2011-02-28 | 2011-07-27 | 昆山兆年涂装科技有限责任公司 | Filter press |
| CN205199092U (en) * | 2015-11-20 | 2016-05-04 | 四川北方硝化棉股份有限公司 | Mud area is mud scraper blade for filter |
| CN105540805A (en) * | 2015-12-08 | 2016-05-04 | 甘肃省建材科研设计院 | Potato starch waste water macro-molecule organic matter separation treatment special-purpose flocculating agent |
| CN110143627A (en) * | 2019-07-04 | 2019-08-20 | 李洪 | A kind of city domestic sewage inorganic agent and sewage treatment process |
| CN111544944A (en) * | 2020-05-23 | 2020-08-18 | 李玲玲 | Rolling belt type dehydrator capable of automatically adjusting tension of filter cloth |
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