CN112978914A - Method for controlling sludge age of double sludge of continuous flow automatic domestic sewage treatment equipment - Google Patents
Method for controlling sludge age of double sludge of continuous flow automatic domestic sewage treatment equipment Download PDFInfo
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- CN112978914A CN112978914A CN201911293132.7A CN201911293132A CN112978914A CN 112978914 A CN112978914 A CN 112978914A CN 201911293132 A CN201911293132 A CN 201911293132A CN 112978914 A CN112978914 A CN 112978914A
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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
- C02F3/30—Aerobic and anaerobic processes
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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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/15—N03-N
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/18—PO4-P
Abstract
A method for controlling the sludge age of double sludge of continuous flow automatic domestic sewage treatment equipment comprises the steps of feeding water in a segmented mode, dividing the water into front-segment water feeding and rear-segment water feeding, feeding the front-segment sewage into a first sewage tank, feeding the rear-segment sewage into a second sewage tank, performing double-sludge precipitation, performing sludge precipitation on the front-segment sewage in the first sewage tank, performing sludge precipitation on the rear-segment sewage in the second sewage tank, feeding water for the second time, introducing the sewage in the first sewage tank into the second sewage tank, and controlling the reflux ratio. The invention adopts a double-sludge precipitation method, and simultaneously controls the reflux ratio to ensure that the sludge age is short, wherein the short sludge age is 5 to 7 days.
Description
Technical Field
The invention relates to the technical field of domestic sewage treatment, in particular to a method for controlling the sludge age of double sludge of continuous flow automatic domestic sewage treatment equipment.
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.
Sludge age refers to the average residence time of microorganisms in the reaction system from their production to the discharge system, i.e., the time required for the microorganisms in the reaction system to be renewed all at once. The existing sewage treatment method has the sludge age between 18 and 20 days and longer sludge age, and is not beneficial to biological phosphorus removal sewage treatment.
Therefore, there is a need to provide a new technical solution to overcome the above-mentioned drawbacks.
Disclosure of Invention
The invention aims to provide a method for controlling the age of double-sludge in continuous flow automatic domestic sewage treatment equipment, which can effectively solve the technical problems.
In order to achieve the purpose of the invention, the following technical scheme is adopted:
a method for controlling the sludge age of double sludge of continuous flow automatic domestic sewage treatment equipment comprises the following steps:
step S1: the method comprises the following steps of (1) feeding water in a segmented mode, wherein the segmented water feeding mode is divided into front-segment water feeding and rear-segment water feeding, front-segment sewage enters a first sewage pool, rear-segment sewage enters a second sewage pool, the load of the front-segment sewage is 0.3-0.45, and the load of the rear-segment sewage is 0.1;
step S2: performing double sludge precipitation, wherein the sludge precipitation is performed on the front-section sewage in a first sewage tank, and the sludge precipitation is performed on the rear-section sewage in a second sewage tank;
step S3: introducing sewage in the first sewage tank into a second sewage tank, wherein the ratio of the effluent of the first sludge tank to the influent of the second sludge tank is 3: 1;
step S4: the growth section of aerobic phosphorus accumulating bacteria is utilized to control the age of the front-stage sludge to be 5 to 7 days;
step S5: the sludge age of the front section is controlled to be 18 to 20 days by utilizing the attenuation section of denitrifying phosphorus accumulating bacteria.
Further: the reflux ratio in step S4 and step S5 is controlled to be 50% to 70%.
Further: in the step S4, the first sewage tank is communicated with a first buffer tank, sludge enters the first buffer tank, and the first buffer tank discharges sludge once every 3 hours, 1 minute every time and 8 times every day.
Further: in the step S4, the second sewage tank is communicated with a second buffer tank, sludge enters the second buffer tank, and the second buffer tank discharges sludge once every 18 hours, 1 minute every time and 13 times every day.
Compared with the prior art, the invention has the following beneficial effects: the method for controlling the sludge age of the double sludge of the continuous flow automatic domestic sewage treatment equipment adopts a double sludge precipitation method, and simultaneously, the sludge age is short by controlling the reflux ratio, and the short sludge age is 5 to 7 days.
Drawings
FIG. 1 is a schematic view of the apparatus for controlling the sludge age of the double sludge of the continuous flow automated domestic sewage treatment apparatus of the present invention.
In the figure: 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 method for controlling the age of the double-sludge in the continuous flow automatic domestic sewage treatment equipment of the invention will be clearly and completely described below with reference to the accompanying drawings.
As shown in figure 1, the equipment of the method for controlling the sludge age of double sludge of the continuous flow automatic domestic sewage treatment equipment comprises a water storage tank 1, wherein the concentration of sewage cod 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 use method thereof are common knowledge and thus are not described herein.
The first buffer pool 5 discharges mud once every 3 hours, 1 minute every time, 8 times every day, and the second buffer pool discharges mud once every 18 hours, 1 minute every time, 1.3 times every day. The denitrifying phosphorus-accumulating bacteria and the aerobic phosphorus-accumulating bacteria are in an environment with the pH value of 8.0-8.9.
The invention relates to a method for controlling the age of double-sludge of continuous flow automatic domestic sewage treatment equipment, which comprises the following steps:
step S1: sewage enters the water storage tank 1, then enters water in sections, and is divided into front section water inlet and rear section water inlet, the front section sewage enters the first sewage tank 2, the rear section sewage enters the second sewage tank 3, the load of the front section sewage is 0.3-0.45, and the load of the rear section sewage is 0.1;
step S2: performing double sludge precipitation, wherein the front-section sewage is subjected to sludge precipitation in a first sewage tank 2, and the rear-section sewage is subjected to sludge precipitation in a second sewage tank 3;
step S3: the sewage in the first sewage tank 2 is introduced into the second sewage tank 3, and the ratio of the effluent of the first sludge tank 2 to the influent of the second sludge tank 3 is 3:1, so that the phosphorus concentration in the second sewage tank 3 can be diluted.
Step S4: the growth section of aerobic phosphorus accumulating bacteria is utilized to control the age of the front-stage sludge to be 5 to 7 days;
step S5: the sludge age of the front section is controlled to be 18 to 20 days by utilizing the attenuation section of denitrifying phosphorus accumulating bacteria.
Wherein: the reflux ratio in step S4 and step S5 is controlled to be 50% to 70%.
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.
The first embodiment is as follows:
sewage enters the water storage tank 1, then front-section sewage enters the first sewage tank 2, rear-section sewage enters the second sewage tank 3, the load of the front-section sewage is 0.3, and the load of the rear-section sewage is 0.1; the front section sewage is subjected to sludge precipitation in the first sewage tank 2, and the rear section sewage is subjected to sludge precipitation in the second sewage tank 3; introducing the sewage in the first sewage tank 2 into a second sewage tank 3, wherein the ratio of the water outlet of the first sludge tank 2 to the water inlet of the second sludge tank 3 is 3: 1; the growth section of aerobic phosphorus accumulating bacteria is used for controlling the age of the fore-stage sludge to be 7 days, the reflux ratio is controlled to be 50 percent, the attenuation section of denitrifying phosphorus accumulating bacteria is used for controlling the age of the fore-stage sludge to be 20 days, and the reflux ratio is controlled to be 50 percent.
Example two:
sewage enters the water storage tank 1, then front-section sewage enters the first sewage tank 2, rear-section sewage enters the second sewage tank 3, the load of the front-section sewage is 0.4-0.45, and the load of the rear-section sewage is 0.07-0.1; the front section sewage is subjected to sludge precipitation in the first sewage tank 2, and the rear section sewage is subjected to sludge precipitation in the second sewage tank 3; introducing the sewage in the first sewage tank 2 into a second sewage tank 3, wherein the ratio of the water outlet of the first sludge tank 2 to the water inlet of the second sludge tank 3 is 3: 1; the growth section of aerobic phosphorus accumulating bacteria is used for controlling the age of the fore-stage sludge to be 6 days, the reflux ratio is controlled to be 60 percent, the attenuation section of denitrifying phosphorus accumulating bacteria is used for controlling the age of the fore-stage sludge to be 19 days, and the reflux ratio is controlled to be 60 percent.
Example three:
sewage enters the water storage tank 1, then front-section sewage enters the first sewage tank 2, rear-section sewage enters the second sewage tank 3, the load of the front-section sewage is 0.4, and the load of the rear-section sewage is 0.1; the front section sewage is subjected to sludge precipitation in the first sewage tank 2, and the rear section sewage is subjected to sludge precipitation in the second sewage tank 3; introducing the sewage in the first sewage tank 2 into a second sewage tank 3, wherein the ratio of the water outlet of the first sludge tank 2 to the water inlet of the second sludge tank 3 is 3: 1; the growth section of aerobic phosphorus accumulating bacteria is used for controlling the age of the fore-stage sludge to be 6 days, the reflux ratio is controlled to be 70 percent, the attenuation section of denitrifying phosphorus accumulating bacteria is used for controlling the age of the fore-stage sludge to be 19 days, and the reflux ratio is controlled to be 70 percent.
Example four:
sewage enters the water storage tank 1, then front-section sewage enters the first sewage tank 2, rear-section sewage enters the second sewage tank 3, the load of the front-section sewage is 0.45, and the load of the rear-section sewage is 0.1; the front section sewage is subjected to sludge precipitation in the first sewage tank 2, and the rear section sewage is subjected to sludge precipitation in the second sewage tank 3; introducing the sewage in the first sewage tank 2 into a second sewage tank 3, wherein the ratio of the water outlet of the first sludge tank 2 to the water inlet of the second sludge tank 3 is 3: 1; the growth section of aerobic phosphorus accumulating bacteria is used for controlling the age of the fore-stage sludge to be 5 days, the reflux ratio is controlled to be 70 percent, the attenuation section of denitrifying phosphorus accumulating bacteria is used for controlling the age of the fore-stage sludge to be 18 days, and the reflux ratio is controlled to be 70 percent.
The invention has the following beneficial effects: the method for controlling the sludge age of the double sludge of the continuous flow automatic domestic sewage treatment equipment adopts a double sludge precipitation method, and simultaneously, the sludge age is short by controlling the reflux ratio, and the short sludge age is 5 to 7 days.
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 (4)
1. A method for controlling the sludge age of double sludge of continuous flow automatic domestic sewage treatment equipment is characterized by comprising the following steps: which comprises the following steps:
step S1: the method comprises the following steps of (1) feeding water in a segmented mode, wherein the segmented water feeding mode is divided into front-segment water feeding and rear-segment water feeding, front-segment sewage enters a first sewage pool, rear-segment sewage enters a second sewage pool, the load of the front-segment sewage is 0.3-0.45, and the load of the rear-segment sewage is 0.1;
step S2: performing double sludge precipitation, wherein the sludge precipitation is performed on the front-section sewage in a first sewage tank, and the sludge precipitation is performed on the rear-section sewage in a second sewage tank;
step S3: introducing sewage in the first sewage tank into a second sewage tank, wherein the ratio of the effluent of the first sludge tank to the influent of the second sludge tank is 3: 1;
step S4: the growth section of aerobic phosphorus accumulating bacteria is utilized to control the age of the front-stage sludge to be 5 to 7 days;
step S5: the sludge age of the front section is controlled to be 18 to 20 days by utilizing the attenuation section of denitrifying phosphorus accumulating bacteria.
2. The method for controlling the age of the double-sludge in the continuous flow automated domestic sewage treatment facility of claim 1, wherein: the reflux ratio in step S4 and step S5 is controlled to be 50% to 70%.
3. The method for controlling the age of the double-sludge in the continuous flow automated domestic sewage treatment facility of claim 1, wherein: in the step S4, the first sewage tank is communicated with a first buffer tank, sludge enters the first buffer tank, and the first buffer tank discharges sludge once every 3 hours, 1 minute every time and 8 times every day.
4. The method for controlling the age of the double-sludge in the continuous flow automated domestic sewage treatment facility of claim 1, wherein: in the step S4, the second sewage tank is communicated with a second buffer tank, sludge enters the second buffer tank, and the second buffer tank discharges sludge once every 18 hours, 1 minute every time and 13 times every day.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911293132.7A CN112978914A (en) | 2019-12-16 | 2019-12-16 | Method for controlling sludge age of double sludge of continuous flow automatic domestic sewage treatment equipment |
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| CN201911293132.7A CN112978914A (en) | 2019-12-16 | 2019-12-16 | Method for controlling sludge age of double sludge of continuous flow automatic domestic sewage treatment equipment |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1504427A (en) * | 2002-11-29 | 2004-06-16 | 北京城市排水集团有限责任公司 | Advanced treating method for urban sewage |
| 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 |
| WO2010115319A1 (en) * | 2009-04-09 | 2010-10-14 | 北京汉青天朗水处理科技有限公司 | Sewage treatment process and system |
| CA2780721A1 (en) * | 2009-12-01 | 2011-06-09 | Jinmin Li | Wastewater pretreatment method and sewage treatment method using the pretreatment method |
| CN103880181A (en) * | 2014-03-10 | 2014-06-25 | 北京工业大学 | Improved A2/O process of continuously shortcut nitrifying and denitrifying dephosphatation |
| CN105060486A (en) * | 2015-08-24 | 2015-11-18 | 安徽科技学院 | Novel technology for treating low-carbon-nitrogen-ratio domestic sewage |
| CN206970429U (en) * | 2017-07-28 | 2018-02-06 | 湖南科技大学 | A kind of sewage-treatment plant of enhanced biological nitrogen removal chemical dephosphorization |
-
2019
- 2019-12-16 CN CN201911293132.7A patent/CN112978914A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1504427A (en) * | 2002-11-29 | 2004-06-16 | 北京城市排水集团有限责任公司 | Advanced treating method for urban sewage |
| WO2010115319A1 (en) * | 2009-04-09 | 2010-10-14 | 北京汉青天朗水处理科技有限公司 | Sewage treatment process and system |
| CA2780721A1 (en) * | 2009-12-01 | 2011-06-09 | Jinmin Li | Wastewater pretreatment method and sewage treatment method using the pretreatment method |
| 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 |
| CN103880181A (en) * | 2014-03-10 | 2014-06-25 | 北京工业大学 | Improved A2/O process of continuously shortcut nitrifying and denitrifying dephosphatation |
| CN105060486A (en) * | 2015-08-24 | 2015-11-18 | 安徽科技学院 | Novel technology for treating low-carbon-nitrogen-ratio domestic sewage |
| CN206970429U (en) * | 2017-07-28 | 2018-02-06 | 湖南科技大学 | A kind of sewage-treatment plant of enhanced biological nitrogen removal chemical dephosphorization |
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