CN112897680A - Continuous flow automatic domestic sewage treatment method - Google Patents
Continuous flow automatic domestic sewage treatment method Download PDFInfo
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- CN112897680A CN112897680A CN201911223965.6A CN201911223965A CN112897680A CN 112897680 A CN112897680 A CN 112897680A CN 201911223965 A CN201911223965 A CN 201911223965A CN 112897680 A CN112897680 A CN 112897680A
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
A continuous flow automatic domestic sewage treatment method comprises the following steps: water is fed in a segmented manner; secondary water inflow; selecting the water distribution ratio and the dilution ratio of inlet water; adjusting aeration quantity; and regulating the inflow of water. According to the invention, the first sewage tank is used for biological phosphorus removal, and then the treated sewage of the first sewage tank is introduced into the second sewage tank, so that the concentrations of phosphorus and nitrogen in the second sewage tank can be reduced, and the phosphorus and nitrogen can be biologically removed, thereby realizing biological nitrogen and phosphorus removal and avoiding secondary pollution caused by phosphorus removal of auxiliary chemical agents; the reasonable selection of the dilution ratio and the water inlet ratio can ensure that the sewage treatment equipment can be stably and continuously operated.
Description
Technical Field
The invention relates to the technical field of domestic sewage treatment, in particular to a continuous flow automatic domestic sewage treatment method.
Background
Modern sewage treatment technology is divided into primary, secondary and tertiary treatment technologies according to treatment degree. The first stage treatment of sewage is carried out by removing insoluble suspended solids and floating substances from sewage by physical methods such as screening, sedimentation, etc. The secondary treatment of sewage is mainly a biological treatment method, namely a process of substance conversion through the metabolism of microorganisms, and various complex organic substances in the sewage are oxidized and degraded into simple substances. The biological treatment has certain requirements on the quality of sewage, the temperature of water, the dissolved oxygen amount in water, the pH value and the like. The third-stage sewage treatment is to remove insoluble organic matters, phosphorus, nitrogen and other nutritive substances in sewage by physical and chemical methods such as coagulation, filtration, ion exchange, reverse osmosis and the like on the basis of the first-stage treatment and the second-stage treatment. The composition of pollutants in sewage is very complex, and the combination of the methods is often needed to meet the treatment requirement.
The existing sewage treatment method has the defects that the biological phosphorus removal is performed at the rear end of the biological nitrogen removal, the biological phosphorus removal is incomplete, and the auxiliary chemical phosphorus removal is needed, so that the sludge is secondarily polluted.
Therefore, there is a need to provide a new technical solution to overcome the above-mentioned drawbacks.
Disclosure of Invention
The present invention aims to provide a continuous flow automatic domestic sewage treatment method which can effectively solve the technical problems.
In order to achieve the purpose of the invention, the following technical scheme is adopted:
a continuous flow automatic domestic sewage treatment method comprises the following steps:
step S1: the method comprises the following steps of (1) feeding water in a segmented mode, wherein the water feeding is divided into front-segment water feeding and rear-segment water feeding, the front-segment sewage enters a first sewage tank, and the rear-segment sewage enters a second sewage tank;
step S2: secondary water inflow, namely introducing the sewage in the first sewage tank into a second sewage tank;
step S3: selecting the water distribution ratio and the dilution ratio of inlet water;
step S4: adjusting the aeration rate, namely adjusting the front-stage aeration rate and adjusting the rear-stage aeration rate;
step S5: and adjusting the inflow rate, namely adjusting the inflow rate of the first sewage tank and the inflow rate of the second sewage tank.
Further: in step S1, the front load is 0.3 to 0.45, and the rear load is 0.1.
Further: in step S3, the ratio of water inflow of the front stage to the rear stage is 3: 1.
Further: in step S3, the dilution ratio is 1:4 to 1: 6.
Further: the front section dissolved oxygen concentration is controlled to be 1mg/L to 1.2mg/L on average, the front section reflux is controlled to be 50 percent to 60 percent, the rear section dissolved oxygen concentration is controlled to be 1mg/L to 1.6mg/L on average, and the rear section reflux is controlled to be 50 percent to 60 percent.
Further: step S5: the hydraulic retention time of the first sewage pool is more than 1 hour, the amount of sewage entering the first sewage pool per hour is 0.2-0.3 of the volume of the first sewage pool, the hydraulic retention time of the sewage entering the second sewage pool is more than 0.7 hour, and the amount of sewage entering the second sewage pool per hour is 0.2-0.3 of the volume of the second sewage pool.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the continuous flow automatic domestic sewage treatment method, the first sewage tank is used for biological phosphorus removal, and then the sewage treated by the first sewage tank is introduced into the second sewage tank, so that the concentrations of phosphorus and nitrogen in the second sewage tank can be reduced, and the phosphorus and nitrogen can be biologically removed, thereby realizing biological nitrogen and phosphorus removal and avoiding secondary pollution caused by auxiliary chemical phosphorus removal.
2. The continuous flow automatic domestic sewage treatment method of the invention can lead sewage treatment equipment to stably and continuously operate by reasonably selecting the dilution ratio and the water inlet ratio.
Drawings
FIG. 1 is a schematic view showing the construction of an apparatus for continuous flow automated domestic sewage treatment according to the present invention.
Description of reference numerals: 1 is a water storage tank, 2 is a first sewage tank, 3 is a second sewage tank, 4 is a water distribution channel, 5 is a first buffer tank, 6 is a second buffer tank, 7 is a stirring device, and 8 is a detection device.
Detailed Description
In the description of the present invention, it is to be understood that the terms "central," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the scope of the invention. When an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
The continuous flow automatic domestic sewage treatment method of the present invention will be described in detail with reference to the accompanying drawings.
As shown in figure 1, the equipment of the continuous flow automatic domestic sewage treatment method of the invention comprises a water storage tank 1, the COD concentration of the sewage entering the water storage tank 1 is 300mg/L to 500mg/L, the total phosphorus concentration is 6mg/L to 9mg/L, and the total nitrogen concentration 50mg/L is 80 mg/L; the first sewage tank 2 is used for treating a part of sewage; the second sewage tank 3 is used for treating the other part of sewage; the water distribution channel 4 is used for distributing water; a first buffer tank 5 for storing sludge and the like; a second buffer tank 6 for storing sludge and the like; the stirring device 7, including but not limited to a mechanical stirring device and a gas stirring device, is selected according to the needs, and the installation method and the use method thereof are common knowledge and are not described herein; the detection device 8 includes, but is not limited to, a phosphorus concentration detection device, a nitrogen concentration detection device, a COD concentration detection device, a pH detection device, a sludge concentration detection device, etc., and the installation method and the using method thereof are common knowledge and thus are not described herein.
The invention relates to a continuous flow automatic domestic sewage treatment method, which comprises the following steps:
step S1: the method comprises the following steps of (1) feeding water in a segmented mode, namely, feeding water in a front segment and feeding water in a rear segment, wherein sewage in the front segment enters a first sewage tank 2, and sewage in the rear segment enters a second sewage tank 3;
step S2: secondary water inflow, namely introducing the sewage in the first sewage tank 2 into a second sewage tank 3;
step S3: selecting the water distribution ratio and the dilution ratio of inlet water;
step S4: adjusting the aeration rate, namely adjusting the front-stage aeration rate and adjusting the rear-stage aeration rate;
step S5: and adjusting the inflow rate, namely adjusting the inflow rate of the first sewage tank 2 and the inflow rate of the second sewage tank 3.
Wherein: the first sewage tank 2 is used for biological phosphorus removal, so that the concentration of phosphorus in the first sewage tank 2 can be reduced, the nitrogen concentration can be diluted, the treated sewage of the first sewage tank 2 is introduced into the second sewage tank 3, the concentrations of phosphorus and nitrogen in the second sewage tank 3 can be reduced, and the phosphorus and nitrogen can be removed biologically, so that the biological nitrogen and phosphorus removal is realized, and the secondary pollution caused by auxiliary chemical phosphorus removal is avoided. The adjustment of aeration is used to control the demand of microorganisms in the wastewater treatment plant for oxygen. The inflow rate of water is adjusted to control the hydraulic circulation.
Further: in step S1, the front load is 0.3 to 0.45, and the rear load is 0.1.
Further: in step S3, the ratio of water inflow of the front stage to the rear stage is 3: 1.
Further: in step S3, the dilution ratio is 1:4 to 1: 6.
Further: the front section dissolved oxygen concentration is controlled to be 1mg/L to 1.2mg/L on average, the front section reflux is controlled to be 50 percent to 60 percent, the rear section dissolved oxygen concentration is controlled to be 1mg/L to 1.6mg/L on average, and the rear section reflux is controlled to be 50 percent to 60 percent.
Further: step S5: the hydraulic retention time of the first sewage tank 2 is more than 1 hour, the amount of sewage entering the first sewage tank 2 per hour is 0.2 to 0.3 of the volume of the sewage, the hydraulic retention time of the sewage entering the second sewage tank 3 per hour is more than 0.7 hour, and the amount of sewage entering the second sewage tank 3 per hour is 0.2 to 0.3 of the volume of the sewage.
Wherein: the biological phosphorus removal reaction speed is slow, the biological nitrogen removal reaction speed is high, and the sewage treatment equipment can stably and continuously operate by reasonably selecting the dilution ratio and the water inlet ratio.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments.
Example (b):
the method comprises the following steps of (1) feeding water in a segmented mode, namely, feeding water in a front segment and feeding water in a rear segment, wherein sewage in the front segment enters a first sewage tank 2, and sewage in the rear segment enters a second sewage tank 3; the front section load is 0.3 to 0.45, the rear section load is 0.1, the water inlet ratio of the front section to the rear section is 3:1, secondary water inlet is carried out, and the sewage in the first sewage tank is introduced into a second sewage tank; the water inlet ratio of the front section to the rear section is 3:1, and the dilution ratio is 1:4 to 1: 6; adjusting aeration quantity, controlling the front-section dissolved oxygen concentration to be 1mg/L to 1.2mg/L averagely, controlling the front-section reflux to be 50 percent to 60 percent, controlling the rear-section dissolved oxygen concentration to be 1mg/L to 1.6mg/L averagely, and controlling the rear-section reflux to be 50 percent to 60 percent; and adjusting the inflow rate, wherein the hydraulic retention time of the first sewage tank 2 is more than 1 hour, the amount of sewage entering the first sewage tank 2 per hour is 0.2-0.3 of the volume of the sewage, the hydraulic retention time of sewage entering the second sewage tank 3 per hour is more than 0.7 hour, and the amount of sewage entering the second sewage tank 3 per hour is 0.2-0.3 of the volume of the sewage.
The invention has the following beneficial effects:
1. according to the continuous flow automatic domestic sewage treatment method, the first sewage tank is used for biological phosphorus removal, and then the sewage treated by the first sewage tank is introduced into the second sewage tank, so that the concentrations of phosphorus and nitrogen in the second sewage tank can be reduced, and the phosphorus and nitrogen can be biologically removed, thereby realizing biological nitrogen and phosphorus removal and avoiding secondary pollution caused by auxiliary chemical phosphorus removal.
2. The continuous flow automatic domestic sewage treatment method of the invention can lead sewage treatment equipment to stably and continuously operate by reasonably selecting the dilution ratio and the water inlet ratio.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (6)
1. A continuous flow automatic domestic sewage treatment method is characterized in that: the method comprises the following steps:
step S1: the method comprises the following steps of (1) feeding water in a segmented mode, wherein the water feeding is divided into front-segment water feeding and rear-segment water feeding, the front-segment sewage enters a first sewage tank, and the rear-segment sewage enters a second sewage tank;
step S2: secondary water inflow, namely introducing the sewage in the first sewage tank into a second sewage tank;
step S3: selecting the water distribution ratio and the dilution ratio of inlet water;
step S4: adjusting the aeration rate, namely adjusting the front-stage aeration rate and adjusting the rear-stage aeration rate;
step S5: and adjusting the inflow rate, namely adjusting the inflow rate of the first sewage tank and the inflow rate of the second sewage tank.
2. The continuous-flow automated domestic sewage treatment process of claim 1, wherein: in step S1, the front load is 0.3 to 0.45, and the rear load is 0.1.
3. The continuous-flow automated domestic sewage treatment process of claim 1, wherein: in step S3, the ratio of water inflow of the front stage to the rear stage is 3: 1.
4. The continuous-flow automated domestic sewage treatment process of claim 1, wherein: in step S3, the dilution ratio is 1:4 to 1: 6.
5. The continuous-flow automated domestic sewage treatment process of claim 1, wherein: the front section dissolved oxygen concentration is controlled to be 1mg/L to 1.2mg/L on average, the front section reflux is controlled to be 50 percent to 60 percent, the rear section dissolved oxygen concentration is controlled to be 1mg/L to 1.6mg/L on average, and the rear section reflux is controlled to be 50 percent to 60 percent.
6. The continuous-flow automated domestic sewage treatment process of claim 1, wherein:
step S5: the hydraulic retention time of the first sewage pool is more than 1 hour, the amount of sewage entering the first sewage pool per hour is 0.2-0.3 of the volume of the first sewage pool, the hydraulic retention time of the sewage entering the second sewage pool is more than 0.7 hour, and the amount of sewage entering the second sewage pool per hour is 0.2-0.3 of the volume of the second sewage pool.
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| CN201911223965.6A CN112897680A (en) | 2019-12-04 | 2019-12-04 | Continuous flow automatic domestic sewage treatment method |
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| CN201911223965.6A CN112897680A (en) | 2019-12-04 | 2019-12-04 | Continuous flow automatic domestic sewage treatment method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767916A (en) * | 2010-02-01 | 2010-07-07 | 中国市政工程华北设计研究总院 | Method for reasonably optimizing and distributing carbon source in treatment of refractory wastewater |
| CN103408142A (en) * | 2013-08-18 | 2013-11-27 | 北京工业大学 | Method for rapidly solving sticky sludge bulking problem |
| CN104230105A (en) * | 2014-09-12 | 2014-12-24 | 河南师范大学 | Urban sewage treatment device and operation method thereof |
| WO2018107740A1 (en) * | 2016-12-14 | 2018-06-21 | 江南大学 | Wastewater nitrogen and phosphorus removal device and application thereof |
-
2019
- 2019-12-04 CN CN201911223965.6A patent/CN112897680A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767916A (en) * | 2010-02-01 | 2010-07-07 | 中国市政工程华北设计研究总院 | Method for reasonably optimizing and distributing carbon source in treatment of refractory wastewater |
| CN103408142A (en) * | 2013-08-18 | 2013-11-27 | 北京工业大学 | Method for rapidly solving sticky sludge bulking problem |
| CN104230105A (en) * | 2014-09-12 | 2014-12-24 | 河南师范大学 | Urban sewage treatment device and operation method thereof |
| WO2018107740A1 (en) * | 2016-12-14 | 2018-06-21 | 江南大学 | Wastewater nitrogen and phosphorus removal device and application thereof |
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