CN112591875A - Industrial wastewater treatment method - Google Patents
Industrial wastewater treatment method Download PDFInfo
- Publication number
- CN112591875A CN112591875A CN202011204646.3A CN202011204646A CN112591875A CN 112591875 A CN112591875 A CN 112591875A CN 202011204646 A CN202011204646 A CN 202011204646A CN 112591875 A CN112591875 A CN 112591875A
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- Prior art keywords
- alkalinity
- raw water
- aeration
- industrial wastewater
- stirring
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- 239000010842 industrial wastewater Substances 0.000 title claims abstract description 32
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 92
- 238000005273 aeration Methods 0.000 claims abstract description 40
- 238000003756 stirring Methods 0.000 claims abstract description 38
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000001556 precipitation Methods 0.000 claims abstract description 14
- 238000012544 monitoring process Methods 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 239000010802 sludge Substances 0.000 claims description 4
- 239000006228 supernatant Substances 0.000 claims 1
- 239000002351 wastewater Substances 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000006396 nitration reaction Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- CVTZKFWZDBJAHE-UHFFFAOYSA-N [N].N Chemical compound [N].N CVTZKFWZDBJAHE-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1263—Sequencing batch reactors [SBR]
-
- 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
-
- 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
The invention provides an industrial wastewater treatment method, which belongs to the technical field of wastewater treatment and comprises the steps of monitoring the ammonia nitrogen concentration and the alkalinity of raw water; judging whether the alkalinity of the raw water is sufficient, wherein the alkalinity is more than 7.7 times of the ammonia nitrogen concentration and is sufficient; the alkalinity is less than 7.7 times of the ammonia nitrogen concentration and more than 4.7 times of the alkalinity concentration, so that the alkalinity is relatively sufficient; adding raw water with sufficient alkalinity into an SBR tank, and performing first aeration, first stirring, first precipitation and decanting stage treatment; adding raw water with relatively sufficient alkalinity into the SBR tank, and performing second aeration, second stirring, second precipitation and decanting stage treatment; the second aeration and the second stirring cycle are alternately performed a plurality of times before the second precipitation. The industrial wastewater treatment method provided by the invention fully utilizes the purpose of improving the alkalinity of the raw water in the second stirring process, does not need to add materials for increasing the alkalinity of the raw water into the part of the raw water, directly improves the alkalinity of the raw water by virtue of the treatment stage, and reduces the treatment cost of the high ammonia nitrogen wastewater.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to an industrial wastewater treatment method.
Background
The high ammonia nitrogen wastewater has great harm to the water environment, and researches on the treatment of the high ammonia nitrogen wastewater are gradually increased in recent years. In the treatment process of high ammonia nitrogen wastewater, the alkalinity is continuously consumed in the nitration process under the condition of high ammonia nitrogen, so that the alkalinity is continuously reduced. Because in the nitration process, 7.07mg/L of alkalinity is consumed per 1mg/L of ammonia nitrogen nitrated. Therefore, in high ammonia nitrogen wastewater such as coking wastewater, chemical fertilizer industrial wastewater and the like, the alkalinity is insufficient, so that more materials for increasing the alkalinity are added into the high ammonia nitrogen wastewater, and the cost of sewage treatment is increased.
Disclosure of Invention
The invention aims to provide an industrial wastewater treatment method to solve the technical problem of high treatment cost of high ammonia nitrogen wastewater in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: provided is an industrial wastewater treatment method, including:
collecting raw water into an adjusting tank, and monitoring the ammonia nitrogen concentration and alkalinity of the raw water;
judging whether the alkalinity of the raw water is sufficient, wherein the alkalinity is more than 7.7 times of the ammonia nitrogen concentration and is sufficient; the alkalinity is less than 7.7 times of the ammonia nitrogen concentration and more than 4.7 times of the alkalinity concentration, so that the alkalinity is relatively sufficient;
adding the raw water with sufficient alkalinity into an SBR tank, and performing first aeration, first stirring, first precipitation and decanting stage treatment;
adding the raw water with relatively sufficient alkalinity into an SBR tank, and performing second aeration, second stirring, second precipitation and decanting stage treatment; the second aeration and the second stirring cycle are alternately performed a plurality of times before the second precipitation.
As another example of the present application, after the second aeration and the second stirring cycle are alternately performed a plurality of times, the second aeration is performed while introducing air into the SBR tank.
As another example of the present application, the second aeration and the second stirring cycle are alternately performed two to five times.
As another embodiment of the application, when the ammonia nitrogen concentration and the alkalinity of the raw water are monitored, the COD concentration and the pH value of the raw water are monitored.
As another embodiment of the application, a fan for performing the first aeration or the second aeration is arranged on the SBR tank.
As another embodiment of this application, be equipped with on the SBR pond and be used for stirring the mixer of raw water.
As another embodiment of this application, be equipped with level sensor in the SBR pond.
As another embodiment of the application, a decanter for discharging upper clear water of the raw water is arranged on the SBR tank.
As another example of the present application, impurities in the SBR tank are treated after the decanting stage.
As another embodiment of this application, be equipped with the sludge pump in the SBR pond, be used for with impurity in the SBR pond is discharged.
The industrial wastewater treatment method provided by the invention has the beneficial effects that: compared with the prior art, the industrial wastewater treatment method comprises the steps of adding raw water into the regulating reservoir, monitoring the ammonia nitrogen concentration and the alkalinity of the raw water in the regulating reservoir, calculating and judging whether the alkalinity of the raw water is sufficient or relatively sufficient, and directly carrying out four stages of treatment including first aeration, first stirring, sedimentation and water decanting on the raw water with sufficient alkalinity; for raw water with relatively sufficient alkalinity, before the precipitation stage, the stages of secondary aeration, secondary stirring, secondary aeration and secondary stirring need to be carried out circularly and alternately for multiple times, the purpose of improving the alkalinity of the raw water in the secondary stirring process is fully utilized, materials for increasing the alkalinity of the raw water do not need to be added into the part of raw water, the alkalinity of the raw water is improved by directly using the treatment stage, and the treatment cost of the high ammonia nitrogen wastewater is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for treating industrial wastewater according to an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
100. a regulating tank; 200. an SBR pool; 300. a clean water tank.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to FIG. 1, a method for treating industrial wastewater according to the present invention will now be described. A method for treating industrial wastewater comprises collecting raw water into a regulating tank 100, and monitoring ammonia nitrogen concentration and alkalinity of the raw water; judging whether the alkalinity of the raw water is sufficient, wherein the alkalinity is more than 7.7 times of the ammonia nitrogen concentration and is sufficient; the alkalinity is less than 7.7 times of the ammonia nitrogen concentration and more than 4.7 times of the alkalinity concentration, so that the alkalinity is relatively sufficient; adding raw water with sufficient alkalinity into the SBR pool 200, and performing first aeration, first stirring, first precipitation and decanting stage treatment; adding raw water with relatively sufficient alkalinity into the SBR tank 200, and performing second aeration, second stirring, second precipitation and decanting stage treatment; the second aeration and the second stirring cycle are alternately performed a plurality of times before the second precipitation.
Compared with the prior art, the industrial wastewater treatment method provided by the invention has the advantages that raw water is added into the regulating reservoir 100, the ammonia nitrogen concentration and the alkalinity of the raw water are monitored in the regulating reservoir 100, the alkalinity of the raw water is sufficient or relatively sufficient is calculated and judged, and the raw water with sufficient alkalinity is directly treated in four stages of first aeration, first stirring, sedimentation and water decanting; for raw water with relatively sufficient alkalinity, before the precipitation stage, the stages of secondary aeration, secondary stirring, secondary aeration and secondary stirring need to be carried out circularly and alternately for multiple times, the purpose of improving the alkalinity of the raw water in the secondary stirring process is fully utilized, materials for increasing the alkalinity of the raw water do not need to be added into the part of raw water, the alkalinity of the raw water is improved by directly using the treatment stage, and the treatment cost of the high ammonia nitrogen wastewater is reduced.
The condition for judging the relative sufficiency of the alkalinity of the raw water is that whether the deficiency of the alkalinity of the raw water is less than 30% of the sufficient alkalinity, namely, the required sufficient alkalinity is calculated according to 7.07 times of the ammonia nitrogen concentration of the raw water, and then the value of the sufficient alkalinity is multiplied by 2/3 to be a relative sufficient alkalinity value, and if the actual alkalinity of the raw water is less than the sufficient alkalinity but more than the relative sufficient alkalinity, the alkalinity is considered to be relatively sufficient.
Referring to fig. 1, as a specific embodiment of the method for treating industrial wastewater according to the present invention, after the second aeration and the second stirring cycle are alternately performed for a plurality of times, the second aeration is performed and air is introduced into the SBR tank 200, and the air is introduced into the raw water and fully contacts with the raw water, so that free ammonia dissolved in the raw water passes through a gas-liquid interface and is transferred to a gas phase, thereby removing ammonia nitrogen.
Referring to fig. 1, as a specific embodiment of the method for treating industrial wastewater according to the present invention, the second aeration and the second stirring are alternately performed two to five times, and the raw water with relatively sufficient alkalinity is insufficient in alkalinity, so that the aeration and the stirring are alternately performed for multiple times, and the alkalinity increased during the denitrification process of the raw water in the stirring stage is increased, that is, the alkalinity of the raw water with relatively sufficient alkalinity is increased, so that the stirring stage can be effectively utilized. The cycle alternation times from two times to five times are set, so that the sufficient alkalinity of the raw water in each aeration process can be ensured, and the efficiency and the effect of the nitrification stage are higher. Too many times will also affect the efficiency of the overall wastewater treatment.
Referring to fig. 1, as a specific embodiment of the method for treating industrial wastewater provided by the present invention, when monitoring ammonia nitrogen concentration and alkalinity of raw water, COD concentration and pH value of raw water are monitored, and COD concentration in raw water is monitored while sufficient or relatively sufficient alkalinity of raw water is calculated by monitoring nitrogen ammonia concentration and concentration of raw water, wherein COD concentration is chemical oxygen demand, which is convenient for calculating parameters such as aeration time. Meanwhile, the pH value of the raw water is monitored, and the chemical composition in the wastewater is judged.
Referring to fig. 1, as a specific embodiment of the method for treating industrial wastewater according to the present invention, a fan for performing first aeration or second aeration is disposed on an SBR tank 200, after the fan is started, raw water enters an aeration stage under the effect of wind force of the fan, and after a certain period of aeration, the fan is stopped, and a next stage of aeration is performed. The aeration stage can be started or closed more conveniently and more conveniently by using the fan, and the operation is convenient and accurate.
Referring to fig. 1, as a specific embodiment of the method for treating industrial wastewater according to the present invention, a stirrer for stirring raw water is disposed on the SBR tank 200, and the stirrer is directly extended into the SBR tank 200 to stir raw water, including a first stirring of raw water with sufficient alkalinity and a second stirring of raw water with relatively sufficient alkalinity, so as to ensure that the stirring step is sufficiently performed during the wastewater treatment process.
Referring to fig. 1, as a specific embodiment of the method for treating industrial wastewater provided by the present invention, a liquid level sensor is disposed in the SBR tank 200, and after raw water is added into the SBR tank 200, the liquid level of the raw water is monitored by the liquid level sensor, so as to prevent the influence of excessive raw water on the treatment effect of the raw water; meanwhile, the water level of the raw water is ensured to be at a higher position, and the wastewater treatment effect of the SBR tank 200 is ensured.
Referring to fig. 1, as a specific embodiment of the method for treating industrial wastewater according to the present invention, a decanter for discharging upper clear water of raw water is provided on the SBR tank 200, the decanter can periodically discharge upper clear water in the SBR tank 200 into a clear water tank 300, and the decanter has a function of decanting clear water from the surface of the SBR tank 200 which is still, without stirring and settling, and ensures the quality of discharged water.
Referring to fig. 1, as a specific embodiment of the method for treating industrial wastewater according to the present invention, after the decanting stage, impurities in the SBR tank 200 are treated, and after the impurities in the SBR tank 200 are removed, more space in the SBR tank 200 can be used for wastewater treatment, so that the raw water holding capacity of the SBR tank 200 is increased, and the raw water treatment efficiency is improved.
Referring to fig. 1, as a specific embodiment of the method for treating industrial wastewater according to the present invention, a sludge pump is disposed in the SBR tank 200 for discharging impurities in the SBR tank 200, and the sewage pump is started to directly pump out impurities such as sludge in the SBR tank 200, so that the operation efficiency is high, and raw water can be better treated in the SBR tank 200.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for treating industrial wastewater, comprising:
collecting raw water into an adjusting tank, and monitoring the ammonia nitrogen concentration and alkalinity of the raw water;
judging whether the alkalinity of the raw water is sufficient, wherein the alkalinity is more than 7.7 times of the ammonia nitrogen concentration and is sufficient; the alkalinity is less than 7.7 times of the ammonia nitrogen concentration and more than 4.7 times of the alkalinity concentration, so that the alkalinity is relatively sufficient;
adding the raw water with sufficient alkalinity into an SBR tank, and performing first aeration, first stirring, first precipitation and decanting stage treatment;
adding the raw water with relatively sufficient alkalinity into an SBR tank, and performing second aeration, second stirring, second precipitation and decanting stage treatment; the second aeration and the second stirring cycle are alternately performed a plurality of times before the second precipitation.
2. The industrial wastewater treatment method according to claim 1, wherein after the second aeration and the second stirring cycle are alternately performed a plurality of times, the second aeration is performed while introducing air into the SBR tank.
3. The industrial wastewater treatment method according to claim 1, wherein the second aeration and the second stirring cycle are alternately performed two to five times.
4. The method according to claim 1, wherein the COD concentration and pH value of the raw water are monitored while monitoring the ammonia nitrogen concentration and alkalinity of the raw water.
5. The industrial wastewater treatment method according to claim 1, wherein a fan for performing the first aeration or the second aeration is provided on the SBR tank.
6. The method for treating industrial wastewater according to claim 1, wherein a stirrer for stirring the raw water is provided on the SBR tank.
7. The industrial wastewater treatment method according to claim 1, wherein a liquid level sensor is provided in the SBR tank.
8. The method for treating industrial wastewater according to claim 1, wherein a decanter for discharging supernatant water of the raw water is provided on the SBR tank.
9. The industrial wastewater treatment method of claim 1, wherein impurities in the SBR tank are treated after the decanting stage.
10. The industrial wastewater treatment method according to claim 9, wherein a sludge pump is provided in the SBR tank for discharging impurities in the SBR tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011204646.3A CN112591875A (en) | 2020-11-02 | 2020-11-02 | Industrial wastewater treatment method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011204646.3A CN112591875A (en) | 2020-11-02 | 2020-11-02 | Industrial wastewater treatment method |
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| CN112591875A true CN112591875A (en) | 2021-04-02 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1569690A (en) * | 2004-03-26 | 2005-01-26 | 彭永臻 | SBR alternant aerobic/anaerobic technology for biological denitrification and real time control device and method thereof |
| CN204661495U (en) * | 2015-03-30 | 2015-09-23 | 杭州拓瑞博科技有限公司 | A/O waste water processes equipment |
| CN107032497A (en) * | 2017-06-23 | 2017-08-11 | 长春工程学院 | Stop the SBR advanced nitrogen On-Line Control Methods of nitrification process in advance |
| CN107032498A (en) * | 2017-06-23 | 2017-08-11 | 长春工程学院 | The method that batch enters enhanced water SBR technique deep denitrifications |
| CN108101216A (en) * | 2018-01-04 | 2018-06-01 | 长沙南方宇航环境工程有限公司 | Sequencing batch active sludge realizes the biological denitrification method of short-cut nitrification and denitrification |
| CN108178294A (en) * | 2017-11-28 | 2018-06-19 | 郑州轻工业学院 | A kind of method of the low matrix anaerobic ammonia oxidation process of synchronous tandem promoter |
-
2020
- 2020-11-02 CN CN202011204646.3A patent/CN112591875A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1569690A (en) * | 2004-03-26 | 2005-01-26 | 彭永臻 | SBR alternant aerobic/anaerobic technology for biological denitrification and real time control device and method thereof |
| CN204661495U (en) * | 2015-03-30 | 2015-09-23 | 杭州拓瑞博科技有限公司 | A/O waste water processes equipment |
| CN107032497A (en) * | 2017-06-23 | 2017-08-11 | 长春工程学院 | Stop the SBR advanced nitrogen On-Line Control Methods of nitrification process in advance |
| CN107032498A (en) * | 2017-06-23 | 2017-08-11 | 长春工程学院 | The method that batch enters enhanced water SBR technique deep denitrifications |
| CN108178294A (en) * | 2017-11-28 | 2018-06-19 | 郑州轻工业学院 | A kind of method of the low matrix anaerobic ammonia oxidation process of synchronous tandem promoter |
| CN108101216A (en) * | 2018-01-04 | 2018-06-01 | 长沙南方宇航环境工程有限公司 | Sequencing batch active sludge realizes the biological denitrification method of short-cut nitrification and denitrification |
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Application publication date: 20210402 |