CN112851034A - Efficient wastewater treatment method for sludge reduction - Google Patents
Efficient wastewater treatment method for sludge reduction Download PDFInfo
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- CN112851034A CN112851034A CN202110102069.5A CN202110102069A CN112851034A CN 112851034 A CN112851034 A CN 112851034A CN 202110102069 A CN202110102069 A CN 202110102069A CN 112851034 A CN112851034 A CN 112851034A
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- 239000010802 sludge Substances 0.000 title claims abstract description 78
- 230000009467 reduction Effects 0.000 title claims abstract description 25
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 181
- 238000005345 coagulation Methods 0.000 claims abstract description 59
- 230000015271 coagulation Effects 0.000 claims abstract description 59
- 238000006243 chemical reaction Methods 0.000 claims abstract description 55
- 239000002253 acid Substances 0.000 claims abstract description 27
- 239000003513 alkali Substances 0.000 claims abstract description 27
- 238000004062 sedimentation Methods 0.000 claims abstract description 25
- 239000010865 sewage Substances 0.000 claims abstract description 24
- 238000003860 storage Methods 0.000 claims abstract description 19
- 238000007599 discharging Methods 0.000 claims abstract description 11
- 239000008394 flocculating agent Substances 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 238000005273 aeration Methods 0.000 claims description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 12
- 238000005485 electric heating Methods 0.000 claims description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
- 239000011790 ferrous sulphate Substances 0.000 claims description 5
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 5
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 5
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 5
- 229920002401 polyacrylamide Polymers 0.000 claims description 5
- 239000002351 wastewater Substances 0.000 claims description 2
- 238000001914 filtration Methods 0.000 description 8
- 238000007664 blowing Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000004659 sterilization and disinfection Methods 0.000 description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000008213 purified water Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011143 downstream manufacturing Methods 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
-
- 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
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- 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
- C02F2101/38—Organic compounds containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/09—Viscosity
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention relates to the technical field of sewage treatment, in particular to a high-efficiency sludge reduction wastewater treatment method, which comprises the following steps: s1, removing large impurities in the sewage through a water inlet grating, and then entering the storage tank through a water pump for storage; s2, allowing water in the storage pool to flow into the pH adjusting pool through the water pump along the middle upper part of the pH adjusting pool, adding acid liquor and alkali liquor into the pH adjusting pool, and adjusting the pH of the water to 6.0-8.0; s3, overflowing water in the pH adjusting tank into the buffer tank, and adjusting the temperature of the water to 50-60 ℃; s4, enabling water in the buffer tank to enter the coagulation reaction tank through a water pump along the middle upper part of the coagulation reaction tank, and adding a flocculating agent into the coagulation reaction tank; s5, aerating the inside of the coagulation reaction tank; s6, discharging sludge at the bottom of the sedimentation tank through a sludge pump.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a high-efficiency sludge reduction wastewater treatment method.
Background
As is known, at present, sewage is generally the waste water from domestic and production discharges, which is subject to a certain degree of pollution. Sewage treatment, which is a process for purifying sewage in order to meet the water quality requirement of draining a certain water body or reusing the sewage; sewage treatment is widely applied to various fields such as buildings, agriculture, traffic, energy, petrifaction, environmental protection, urban landscape, medical treatment, catering and the like, and is increasingly used in daily life of common people.
From the aspect of water supply treatment, impurities in the water body can be divided into three categories, namely suspended matters, colloids and dissolved matters. The water purification treatment of urban water plants aims to remove suspended substances, colloidal substances, bacteria and other harmful components which can bring harm to human health and industrial production in the original water body, so that the purified water can meet the requirements of life drinking and industrial production.
In the prior art, several processes of coagulation, sedimentation, filtration and disinfection are generally adopted, for example, application publication No. CN108017194A discloses a sewage treatment method, which comprises the following steps: A. and (3) precipitation: introducing the sewage into a sedimentation tank, standing for 5-8 hours, and separating clear water from sediment; B. coagulation: introducing clear water into a coagulation tank, and adding a coagulant for coagulation; C. and (3) filtering: b, introducing the water treated in the step B into a filtering tank, and filtering the water sequentially through a coarse filtering layer, a fine filtering layer and a secondary filtering layer in the filtering tank; D. and (3) disinfection: preparing a disinfection pool; the disinfection pool comprises a support frame, a purified water bucket, an air blowing mechanism and a power mechanism; the water purifying barrel is obliquely and rotatably arranged on the supporting frame, and a plurality of water hoppers are arranged in the water purifying barrel; the air blowing mechanism comprises an air blowing pipe and a water wheel, and the water wheel is fixed on the air blowing pipe; when the water purifying bucket rotates in the forward direction, the water wheel rotates in the reverse direction under the power of the water flowing out of the water bucket.
In the process of sewage treatment, the quality of sewage varies, such as pH, temperature, CODCr、BOD5Organic matter, ammonia nitrogen and SS etc. and among the prior art, do not pay attention to the preliminary treatment of sewage mostly, sewage nature is unstable sends to next process promptly, leads to needs repeated treatment, extravagant energy, and numerous foreign matters all can precipitate in the sewage, change into the precipitation that is visible to the naked eye, reduce downstream process load, therefore the preliminary treatment of sewage is very important.
Disclosure of Invention
In order to solve the technical problems, the invention provides a high-efficiency wastewater treatment method for sludge reduction.
The invention relates to a high-efficiency sludge reduction wastewater treatment method, which comprises the following steps:
s1, removing large impurities in the sewage through a water inlet grating, and then entering the storage tank through a water pump for storage;
s2, allowing water in the storage pool to flow into the pH adjusting pool through the water pump along the middle upper part of the pH adjusting pool, adding acid liquor and alkali liquor into the pH adjusting pool, and adjusting the pH of the water to 6.0-8.0;
s3, overflowing water in the pH adjusting tank into the buffer tank, and adjusting the temperature of the water to 50-60 ℃;
s4, enabling water in the buffer tank to enter the coagulation reaction tank through a water pump along the middle upper part of the coagulation reaction tank, and adding a flocculating agent into the coagulation reaction tank;
s5, aerating the interior of the coagulation reaction tank, discharging flocculate and part of water into the interior of the sedimentation tank through a slag discharge device at the top of the coagulation reaction tank, and enabling the middle-lower water of the coagulation reaction tank and the top water of the sedimentation tank to flow into an integrated water treatment device for treatment;
s6, discharging sludge at the bottom of the sedimentation tank through a sludge pump, sending the sludge to a sludge dewatering machine, dewatering the sludge by a sludge dewatering machine, and transporting the sludge to the outside by a transport vehicle.
The invention relates to a high-efficiency sludge-reduction wastewater treatment method, wherein an integrated water treatment device in the step S5 comprises a shell, an anaerobic tank, an aerobic tank and a sedimentation tank are sequentially arranged in the shell from right to left, an aeration disc is arranged at the bottom in the aerobic tank, sludge is conveyed into a sludge dewatering machine by a sludge pump at the bottom of the sedimentation tank, the water outlet end of the sludge dewatering machine enters the integrated water treatment device again, and clean water is discharged along the top of the sedimentation tank.
In the step S2, the acid solution is a dilute sulfuric acid solution with the concentration of 30-50%, the alkali solution is a sodium hydroxide solution with the concentration of 20-30%, and a pH online tester is arranged inside the pH adjusting tank.
The invention relates to a wastewater treatment method for efficient sludge reduction, wherein in the step S2, the adding modes of acid liquor and alkali liquor are as follows: be equipped with acid tank and alkali jar, acid tank and alkali jar respectively communicate the measuring pump, and the measuring pump output is provided with the coil pipe, and the coil pipe top is provided with a plurality of blowout holes, and blowout hole department movable mounting has the end cover, is provided with on the coil pipe and prevents that end cover turned angle is greater than a plurality of L type poles of 90, and the bottom is provided with the aeration dish in the pH adjusting pond, and the aeration dish is in the coil pipe below.
According to the efficient wastewater treatment method for sludge reduction, the water temperature adjusting mode in the step S3 is a plurality of electric heating pipes, the electric heating pipes are arranged on the buffer pool in a lifting mode through four groups of hydraulic cylinders, the water temperature in the step S3 is 55-60 ℃, and at least four groups of temperature sensors are arranged on the inner wall of the buffer pool.
The invention relates to a high-efficiency sludge reduction wastewater treatment method, wherein a water inlet grid comprises a tank body, a rotating shaft is rotatably arranged on the tank body and driven by a speed reduction motor, four groups of grid nets are arranged on the rotating shaft in an annular array, annular baffles are arranged at the end parts of the grid nets, a slag receiving groove is arranged at the top of the tank body in a sliding manner, and a water inlet pipe is arranged at the left end of the top of the tank body.
The invention relates to a high-efficiency sludge reduction wastewater treatment method, wherein water at the middle lower part of a coagulation reaction tank is communicated with an integrated water treatment device through a water pump, a turbidity tester is arranged at the water outlet end of the middle lower part of the coagulation reaction tank, a return pipe is communicated between the water outlet end of the middle lower part of the coagulation reaction tank and a buffer tank, and if the turbidity tester detects that the water turbidity is more than 8 degrees, the water at the middle lower part of the coagulation reaction tank flows back to the interior of the buffer tank along the return pipe.
According to the efficient wastewater treatment method for sludge reduction, the flocculating agent in the step S4 comprises ferrous sulfate and polyacrylamide.
Compared with the prior art, the invention has the beneficial effects that:
compared with the prior art, when the integrated water treatment device is used for sewage treatment, impurities in the sewage are subjected to flocculation treatment, so that the load of the integrated water treatment device is greatly reduced, and then the integrated water treatment device is used for treating nitrogen and the like in the sewage, so that various indexes in the purified water are greatly reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
FIG. 3 is a schematic view of the structure of the water intake grill;
FIG. 4 is a schematic diagram of the structure of a pH adjusting tank;
FIG. 5 is an enlarged view of a portion A of FIG. 1;
in the drawings, the reference numbers: 1. a water inlet grille; 2. a water pump; 3. a storage pool; 4. a pH adjusting tank; 5. a buffer pool; 6. a coagulation reaction tank; 7. a slag discharge device; 8. an integrated water treatment device; 9. a sludge pump; 10. a sludge dewatering machine; 801. a housing; 802. an anaerobic jar; 803. an aerobic tank; 804. a settling tank; 11. a pH on-line tester; 12. an acid tank; 13. an alkali tank; 14. a metering pump; 15. a coil pipe; 16. an end cap; 17. an L-shaped rod; 18. an aeration disc; 19. an electric heating tube; 20. a hydraulic cylinder; 21. a temperature sensor; 101. a tank body; 102. a rotating shaft; 103. a grid net; 104. an annular baffle; 105. a slag receiving groove; 106. a water inlet pipe; 22. a turbidity tester; 23. a return pipe; 24. a sedimentation tank.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The water quality of raw water is as follows: CODCr200-300mg/L, pH value of 5.3, BOD5Is 100-150mg/L, ammonia nitrogen is 5-30mg/L, and SS is 100-200 mg/L;
example 1:
the invention relates to a high-efficiency sludge reduction wastewater treatment method, which comprises the following steps:
s1, removing large impurities in the sewage through the water inlet grille 1, and then entering the storage pool 3 through the water pump 2 for storage;
s2, allowing water in the storage tank 3 to flow into the pH adjusting tank 4 through the water pump 2 along the middle upper part of the pH adjusting tank 4, adding acid liquor and alkali liquor into the pH adjusting tank 4, and adjusting the pH of the water to 6.0;
s3, overflowing water in the pH adjusting tank 4 into the buffer tank 5, and adjusting the temperature of the water to 50 ℃;
s4, enabling water in the buffer pool 5 to enter the coagulation reaction pool 6 along the middle upper part of the coagulation reaction pool 6 through the water pump 2, and adding a flocculating agent into the coagulation reaction pool 6;
s5, aerating the interior of the coagulation reaction tank 6, discharging flocculates and part of water into the interior of the sedimentation tank 24 through a slag discharge device 7 at the top of the coagulation reaction tank 6, and enabling the water at the middle lower part of the coagulation reaction tank 6 and the water at the top of the sedimentation tank 24 to flow into the integrated water treatment device 8 for treatment;
s6, discharging sludge at the bottom in the sedimentation tank 24 through a sludge pump 9, sending the sludge into a sludge dewatering machine 10, dewatering the sludge by the sludge dewatering machine 10, and transporting the sludge to the outside by a transport vehicle.
Further, in step S5, the integrated water treatment apparatus 8 includes a housing 801, an anaerobic tank 802, an aerobic tank 803, and a settling tank 804 are sequentially provided from right to left in the housing 801, an aeration tray 18 is provided at the bottom in the aerobic tank 803, sludge is sent to the inside of the sludge dewatering machine 10 by the sludge pump 9 at the bottom of the settling tank 804, the water outlet end of the sludge dewatering machine 10 enters the integrated water treatment apparatus 8 again, and clean water is discharged along the top of the settling tank 804.
Further, in the step S2, the acid solution is a dilute sulfuric acid solution with a concentration of 30-50%, the alkali solution is a sodium hydroxide solution with a concentration of 20-30%, and the pH online tester 11 is disposed inside the pH adjusting tank 4.
Further, the acid liquor and alkali liquor adding manner in the step S2 is as follows: the acid tank 12 and the alkali tank 13 are equipped, the acid tank 12 and the alkali tank 13 are respectively communicated with a metering pump 14, the output end of the metering pump 14 is provided with a coil pipe 15, the top end of the coil pipe 15 is provided with a plurality of ejection holes, the ejection holes are movably provided with an end cover 16, the coil pipe 15 is provided with a plurality of L-shaped rods 17 for preventing the rotation angle of the end cover 16 from being larger than 90 degrees, an aeration disc 18 is arranged at the bottom in the pH adjusting tank 4, and the aeration disc 18 is positioned below the coil.
Furthermore, in the step S3, the water temperature adjusting manner is a plurality of electric heating pipes 19, and each of the plurality of electric heating pipes 19 is installed on the buffer pool 5 in a lifting manner by four sets of hydraulic cylinders 20, and at least four sets of temperature sensors 21 are arranged on the inner wall of the buffer pool 5.
Further, the water inlet grille 1 comprises a tank body 101, a rotating shaft 102 is rotatably arranged on the tank body 101, the rotating shaft 102 is driven by a speed reduction motor, four groups of grille nets 103 are arranged on the rotating shaft 102 in an annular array, an annular baffle body 104 is arranged at the end part of each grille net 103, a slag receiving groove 105 is arranged at the top of the tank body 101 in a sliding manner, and a water inlet pipe 106 is arranged at the left end of the top of the tank body 101.
Furthermore, the lower water in the coagulation reaction tank 6 is communicated with the integrated water treatment device 8 through the water pump 2, a turbidity tester 22 is arranged at the water outlet end of the lower middle part of the coagulation reaction tank 6, a return pipe 23 is communicated between the water outlet end of the lower middle part of the coagulation reaction tank 6 and the buffer tank 5, and if the turbidity tester 22 detects that the water turbidity is greater than 8 degrees, the lower middle water in the coagulation reaction tank 6 flows back to the inside of the buffer tank 5 along the return pipe 23.
Further, the flocculant in the step S4 includes ferrous sulfate and polyacrylamide. Example 2:
the invention relates to a high-efficiency sludge reduction wastewater treatment method, which comprises the following steps:
s1, removing large impurities in the sewage through the water inlet grille 1, and then entering the storage pool 3 through the water pump 2 for storage;
s2, allowing water in the storage tank 3 to flow into the pH adjusting tank 4 through the water pump 2 along the middle upper part of the pH adjusting tank 4, adding acid liquor and alkali liquor into the pH adjusting tank 4, and adjusting the pH of the water to 8.0;
s3, overflowing water in the pH adjusting tank 4 into the buffer tank 5, and adjusting the temperature of the water to 60 ℃;
s4, enabling water in the buffer pool 5 to enter the coagulation reaction pool 6 along the middle upper part of the coagulation reaction pool 6 through the water pump 2, and adding a flocculating agent into the coagulation reaction pool 6;
s5, aerating the interior of the coagulation reaction tank 6, discharging flocculates and part of water into the interior of the sedimentation tank 24 through a slag discharge device 7 at the top of the coagulation reaction tank 6, and enabling the water at the middle lower part of the coagulation reaction tank 6 and the water at the top of the sedimentation tank 24 to flow into the integrated water treatment device 8 for treatment;
s6, discharging sludge at the bottom in the sedimentation tank 24 through a sludge pump 9, sending the sludge into a sludge dewatering machine 10, dewatering the sludge by the sludge dewatering machine 10, and transporting the sludge to the outside by a transport vehicle.
Further, in step S5, the integrated water treatment apparatus 8 includes a housing 801, an anaerobic tank 802, an aerobic tank 803, and a settling tank 804 are sequentially provided from right to left in the housing 801, an aeration tray 18 is provided at the bottom in the aerobic tank 803, sludge is sent to the inside of the sludge dewatering machine 10 by the sludge pump 9 at the bottom of the settling tank 804, the water outlet end of the sludge dewatering machine 10 enters the integrated water treatment apparatus 8 again, and clean water is discharged along the top of the settling tank 804.
Further, in the step S2, the acid solution is a dilute sulfuric acid solution with a concentration of 30-50%, the alkali solution is a sodium hydroxide solution with a concentration of 20-30%, and the pH online tester 11 is disposed inside the pH adjusting tank 4.
Further, the acid liquor and alkali liquor adding manner in the step S2 is as follows: the acid tank 12 and the alkali tank 13 are equipped, the acid tank 12 and the alkali tank 13 are respectively communicated with a metering pump 14, the output end of the metering pump 14 is provided with a coil pipe 15, the top end of the coil pipe 15 is provided with a plurality of ejection holes, the ejection holes are movably provided with an end cover 16, the coil pipe 15 is provided with a plurality of L-shaped rods 17 for preventing the rotation angle of the end cover 16 from being larger than 90 degrees, an aeration disc 18 is arranged at the bottom in the pH adjusting tank 4, and the aeration disc 18 is positioned below the coil.
Furthermore, in the step S3, the water temperature adjusting manner is a plurality of electric heating pipes 19, and each of the plurality of electric heating pipes 19 is installed on the buffer pool 5 in a lifting manner by four sets of hydraulic cylinders 20, and at least four sets of temperature sensors 21 are arranged on the inner wall of the buffer pool 5.
Further, the water inlet grille 1 comprises a tank body 101, a rotating shaft 102 is rotatably arranged on the tank body 101, the rotating shaft 102 is driven by a speed reduction motor, four groups of grille nets 103 are arranged on the rotating shaft 102 in an annular array, an annular baffle body 104 is arranged at the end part of each grille net 103, a slag receiving groove 105 is arranged at the top of the tank body 101 in a sliding manner, and a water inlet pipe 106 is arranged at the left end of the top of the tank body 101.
Furthermore, the lower water in the coagulation reaction tank 6 is communicated with the integrated water treatment device 8 through the water pump 2, a turbidity tester 22 is arranged at the water outlet end of the lower middle part of the coagulation reaction tank 6, a return pipe 23 is communicated between the water outlet end of the lower middle part of the coagulation reaction tank 6 and the buffer tank 5, and if the turbidity tester 22 detects that the water turbidity is greater than 8 degrees, the lower middle water in the coagulation reaction tank 6 flows back to the inside of the buffer tank 5 along the return pipe 23.
Further, the flocculant in the step S4 includes ferrous sulfate and polyacrylamide. Example 3:
the invention relates to a high-efficiency sludge reduction wastewater treatment method, which comprises the following steps:
s1, removing large impurities in the sewage through the water inlet grille 1, and then entering the storage pool 3 through the water pump 2 for storage;
s2, allowing water in the storage tank 3 to flow into the pH adjusting tank 4 through the water pump 2 along the middle upper part of the pH adjusting tank 4, adding acid liquor and alkali liquor into the pH adjusting tank 4, and adjusting the pH of the water to 7.0;
s3, overflowing water in the pH adjusting tank 4 into the buffer tank 5, and adjusting the temperature of the water to 59 ℃;
s4, enabling water in the buffer pool 5 to enter the coagulation reaction pool 6 along the middle upper part of the coagulation reaction pool 6 through the water pump 2, and adding a flocculating agent into the coagulation reaction pool 6;
s5, aerating the interior of the coagulation reaction tank 6, discharging flocculates and part of water into the interior of the sedimentation tank 24 through a slag discharge device 7 at the top of the coagulation reaction tank 6, and enabling the water at the middle lower part of the coagulation reaction tank 6 and the water at the top of the sedimentation tank 24 to flow into the integrated water treatment device 8 for treatment;
s6, discharging sludge at the bottom in the sedimentation tank 24 through a sludge pump 9, sending the sludge into a sludge dewatering machine 10, dewatering the sludge by the sludge dewatering machine 10, and transporting the sludge to the outside by a transport vehicle.
Further, in step S5, the integrated water treatment apparatus 8 includes a housing 801, an anaerobic tank 802, an aerobic tank 803, and a settling tank 804 are sequentially provided from right to left in the housing 801, an aeration tray 18 is provided at the bottom in the aerobic tank 803, sludge is sent to the inside of the sludge dewatering machine 10 by the sludge pump 9 at the bottom of the settling tank 804, the water outlet end of the sludge dewatering machine 10 enters the integrated water treatment apparatus 8 again, and clean water is discharged along the top of the settling tank 804.
Further, in the step S2, the acid solution is a dilute sulfuric acid solution with a concentration of 30-50%, the alkali solution is a sodium hydroxide solution with a concentration of 20-30%, and the pH online tester 11 is disposed inside the pH adjusting tank 4.
Further, the acid liquor and alkali liquor adding manner in the step S2 is as follows: the acid tank 12 and the alkali tank 13 are equipped, the acid tank 12 and the alkali tank 13 are respectively communicated with a metering pump 14, the output end of the metering pump 14 is provided with a coil pipe 15, the top end of the coil pipe 15 is provided with a plurality of ejection holes, the ejection holes are movably provided with an end cover 16, the coil pipe 15 is provided with a plurality of L-shaped rods 17 for preventing the rotation angle of the end cover 16 from being larger than 90 degrees, an aeration disc 18 is arranged at the bottom in the pH adjusting tank 4, and the aeration disc 18 is positioned below the coil.
Furthermore, in the step S3, the water temperature adjusting manner is a plurality of electric heating pipes 19, and each of the plurality of electric heating pipes 19 is installed on the buffer pool 5 in a lifting manner by four sets of hydraulic cylinders 20, and at least four sets of temperature sensors 21 are arranged on the inner wall of the buffer pool 5.
Further, the water inlet grille 1 comprises a tank body 101, a rotating shaft 102 is rotatably arranged on the tank body 101, the rotating shaft 102 is driven by a speed reduction motor, four groups of grille nets 103 are arranged on the rotating shaft 102 in an annular array, an annular baffle body 104 is arranged at the end part of each grille net 103, a slag receiving groove 105 is arranged at the top of the tank body 101 in a sliding manner, and a water inlet pipe 106 is arranged at the left end of the top of the tank body 101.
Furthermore, the lower water in the coagulation reaction tank 6 is communicated with the integrated water treatment device 8 through the water pump 2, a turbidity tester 22 is arranged at the water outlet end of the lower middle part of the coagulation reaction tank 6, a return pipe 23 is communicated between the water outlet end of the lower middle part of the coagulation reaction tank 6 and the buffer tank 5, and if the turbidity tester 22 detects that the water turbidity is greater than 8 degrees, the lower middle water in the coagulation reaction tank 6 flows back to the inside of the buffer tank 5 along the return pipe 23.
Further, the flocculant in the step S4 includes ferrous sulfate and polyacrylamide.
The raw water was treated in examples 1-3 to obtain the data in table 1:
| example 1 | Example 2 | Example 3 | Quality of raw water | |
| CODCr(mg/L) | 36 | 34 | 39 | 200-300 |
| BOD5(mg/L) | 8 | 5 | 9 | 100-150 |
| Ammonia nitrogen (mg/L) | 5 | 4 | 5 | 5-30 |
| SS(mg/L) | 9 | 5 | 8 | 100-200 |
TABLE 1
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A wastewater treatment method for efficient sludge reduction is characterized by comprising the following steps:
s1, removing large impurities in the sewage through a water inlet grating, and then entering the storage tank through a water pump for storage;
s2, allowing water in the storage pool to flow into the pH adjusting pool through the water pump along the middle upper part of the pH adjusting pool, adding acid liquor and alkali liquor into the pH adjusting pool, and adjusting the pH of the water to 6.0-8.0;
s3, overflowing water in the pH adjusting tank into the buffer tank, and adjusting the temperature of the water to 50-60 ℃;
s4, enabling water in the buffer tank to enter the coagulation reaction tank through a water pump along the middle upper part of the coagulation reaction tank, and adding a flocculating agent into the coagulation reaction tank;
s5, aerating the interior of the coagulation reaction tank, discharging flocculate and part of water into the interior of the sedimentation tank through a slag discharge device at the top of the coagulation reaction tank, and enabling the middle-lower water of the coagulation reaction tank and the top water of the sedimentation tank to flow into an integrated water treatment device for treatment;
s6, discharging sludge at the bottom of the sedimentation tank through a sludge pump, sending the sludge to a sludge dewatering machine, dewatering the sludge by a sludge dewatering machine, and transporting the sludge to the outside by a transport vehicle.
2. The method of claim 1, wherein the integrated water treatment device comprises a housing, the housing is provided with an anaerobic tank, an aerobic tank and a sedimentation tank from right to left, an aeration plate is disposed at the bottom of the aerobic tank, sludge is pumped into the sludge dewatering machine from the bottom of the sedimentation tank, the water outlet end of the sludge dewatering machine enters the integrated water treatment device again, and clean water is discharged from the top of the sedimentation tank.
3. The method for wastewater treatment with high sludge reduction efficiency as claimed in claim 2, wherein the acid solution in step S2 is a dilute sulfuric acid solution with a concentration of 30-50%, the alkali solution is a sodium hydroxide solution with a concentration of 20-30%, and a pH on-line tester is disposed inside the pH adjusting tank.
4. The method for treating wastewater with high sludge reduction efficiency according to claim 3, wherein the acid liquor and alkali liquor are added in the following manner in step S2: be equipped with acid tank and alkali jar, acid tank and alkali jar respectively communicate the measuring pump, and the measuring pump output is provided with the coil pipe, and the coil pipe top is provided with a plurality of blowout holes, and blowout hole department movable mounting has the end cover, is provided with on the coil pipe and prevents that end cover turned angle is greater than a plurality of L type poles of 90, and the bottom is provided with the aeration dish in the pH adjusting pond, and the aeration dish is in the coil pipe below.
5. The method for wastewater treatment with high sludge reduction efficiency according to claim 4, wherein the water temperature adjusting means in step S3 is a plurality of electric heating pipes, each electric heating pipe is installed on the buffer tank in a lifting manner by four sets of hydraulic cylinders, the water temperature in step S3 is 55-60 ℃, and at least four sets of temperature sensors are arranged on the inner wall of the buffer tank.
6. The method as claimed in claim 5, wherein the water inlet grille comprises a tank body, a rotating shaft is rotatably arranged on the tank body, the rotating shaft is driven by a speed reduction motor, four groups of grille nets are arranged on the rotating shaft in an annular array, annular baffles are arranged at the end parts of the grille nets, a slag receiving groove is slidably arranged at the top of the tank body, and a water inlet pipe is arranged at the left end of the top of the tank body.
7. The method for wastewater treatment with high sludge reduction efficiency as claimed in claim 6, wherein the lower water in the coagulation reaction tank is communicated with the integrated water treatment device through a water pump, a turbidity tester is arranged at the water outlet end of the lower middle part of the coagulation reaction tank, a return pipe is communicated between the water outlet end of the lower middle part of the coagulation reaction tank and the buffer tank, and if the turbidity tester detects that the water turbidity is greater than 8 degrees, the lower water in the coagulation reaction tank flows back to the interior of the buffer tank along the return pipe.
8. The method for wastewater treatment with high sludge reduction according to claim 7, wherein the flocculating agent in step S4 comprises ferrous sulfate and polyacrylamide.
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| CN104030526A (en) * | 2014-06-06 | 2014-09-10 | 卢琴芳 | Pre-position sludge dewatering-based wastewater treatment process |
| CN206089148U (en) * | 2016-08-26 | 2017-04-12 | 瓮福达州化工有限责任公司 | Desalinized water waste water neutralization system |
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