CN110790448A - Method for treating black and odorous water body in river pond - Google Patents
Method for treating black and odorous water body in river pond Download PDFInfo
- Publication number
- CN110790448A CN110790448A CN201810870179.4A CN201810870179A CN110790448A CN 110790448 A CN110790448 A CN 110790448A CN 201810870179 A CN201810870179 A CN 201810870179A CN 110790448 A CN110790448 A CN 110790448A
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- sludge
- zone
- water body
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- anaerobic
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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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
Abstract
The invention relates to a method for treating a black and odorous water body in a pond, which utilizes a manually arranged separation weir and a sludge dam to build sewage treatment equipment in the pond on site, thereby reducing the investment and the conveying cost of sewage conveying pipelines and reducing the investment and the operating cost of sewage treatment facilities. The invention utilizes the reflux technology of anaerobic sludge and aerobic sludge to improve the reaction rate and accelerate the treatment speed.
Description
Technical Field
The invention relates to the technical field of environmental engineering, in particular to a method for treating black and odorous sewage in a pond.
Background
In the process of continuous expansion of urbanization scale and continuous improvement of industrialization degree in China, a large amount of industrial sewage and domestic sewage which are difficult to treat can be generated, so that the pond is black and smelly. The main pollutants contained in the sewage comprise organic pollutants, aerobic inorganic pollutants, plant pollutants, toxic pollutants and the like, the water quality is complex, the toxicity is high, and the contents of ammonia nitrogen, COD (chemical oxygen demand) and BOD (biochemical oxygen demand) are higher, so that the treatment of the black and odorous water body to meet the requirement of environmental protection is very important.
Therefore, a method for treating the black and odorous water body sewage of the pond is needed to meet the demand of the times.
Disclosure of Invention
Aiming at the requirements of the prior art, a method for treating the black and odorous water body in the pond is provided.
The technical scheme of the invention is as follows: a method for treating a black and odorous water body in a pond comprises the following steps:
step 1: injecting sewage: pumping or naturally flowing the sewage into the mixed anaerobic reaction zone.
Step 2: anaerobic reaction: adding the first coagulating and mixing agent into the mixed anaerobic reaction zone, and fully mixing and stirring. Firstly, removing most pollutants in the polluted water body, and carrying out anaerobic reaction on the part of precipitated and separated pollutants and the lower sludge in the polluted water body, so as to further make the precipitated pollutants and the underwater sludge harmless, namely, removing part of heavy metal ions and degrading part of organic matters.
And step 3: primary precipitation: the water flow enters an inclined tube sedimentation zone for sedimentation, and suspended matters in the water body are removed. 100 percent of sludge deposited at the bottom of the inclined tube deposition area is refluxed to the mixed anaerobic reaction area through a submersible sewage pump to continue anaerobic reaction.
And 4, step 4: anaerobic sludge backflow: 50% of anaerobic sludge at the bottom of the mixed anaerobic reaction zone is refluxed by using a submersible sewage pump, and the rest 50% of anaerobic sludge is sent to a sludge treatment zone for treatment. The anaerobic sludge backflow improves the strain concentration in the mixed anaerobic reaction area and enables the strains and pollutants to be fully mixed, so that the anaerobic reaction efficiency is improved.
And 5: aerobic reaction: so that the effluent of the inclined tube precipitation zone enters an aerobic reaction zone and undergoes aerobic reaction through an aerobic biological treatment device.
Step 6: aerobic sludge backflow: and a part of sludge deposited at the bottom of the aerobic reaction zone is refluxed and uniformly distributed on the surface of a reaction carrier of the aerobic biological treatment device by using a submersible sewage pump, so that the number of aerobic bacteria of the reaction carrier is increased. And sending the residual sludge to a sludge treatment area for treatment.
And 7: secondary precipitation: the effluent of the aerobic reaction zone enters an inclined tube sedimentation zone II; and adding a second coagulation mixing agent into the second inclined tube precipitation zone. And carrying out drug reaction and secondary precipitation in the inclined tube precipitation zone II to further remove suspended matters in water.
And 8: and (3) strengthening oxidation: water is discharged from the second sedimentation area; if the effluent reaches the standard, entering step 9; otherwise, entering a strong oxidation area for strong oxidation;
and step 9: discharging treated water: the water that completes step 8 is drained.
Further, the first coagulation mixing agent in the step 2 comprises a coagulant, mud and a weakly alkaline substance. Adding the slurry into a water body, and mixing and stirring to make the water body turbid. The purpose is to wrap impurities or harmful substances in the water body and then precipitate the impurities or the harmful substances. The precipitation rate of impurities or harmful substances is improved, and the decontamination rate of the water body is accelerated. The alkalescent substance is added to neutralize acidic substances in the sludge, accelerate the anaerobic reaction and efficiently degrade organic matters in the sludge.
Further, the second coagulation mixing agent in the step 7 comprises a coagulant and a slurry.
Furthermore, when the temperature of the water body is lower than 20 ℃, the heat pump heating system is started. The heat pump heat supply system supplies heat to the aerobic reaction zone, so that the aerobic reaction can still be normally carried out under the low-temperature condition.
Furthermore, anaerobic sludge is arranged at the bottom of the mixed anaerobic reaction zone in advance. The anaerobic sludge can be sludge precipitated in the mixed anaerobic reaction zone, and can also be digested sludge specially placed outside. The main purpose is to improve the concentration of anaerobic bacteria in the mixed anaerobic reaction zone and accelerate the degradation of organic matters.
Furthermore, the heat pump heating system comprises a heating pipe, an air source heat pump or a water source heat pump; the heat supply pipe is connected with an air source heat pump or a water source heat pump.
Has the advantages that: the method for treating the black and odorous water body in the pond of the invention utilizes the manually arranged separation weir and the sludge dam to build the sewage treatment equipment in the pond on site, thereby reducing the investment and the operating cost of sewage conveying pipelines and reducing the investment and the operating cost of sewage treatment facilities. By utilizing the reflux technology of the anaerobic sludge and the aerobic sludge, the reaction rate is improved, and the treatment speed is accelerated.
Drawings
FIG. 1 is a cross-sectional view of the present invention taken along the direction of water flow in a river;
FIG. 2 is a top view of the present invention taken along the direction of river water flow;
fig. 3 is a flow chart of a method for treating the black and odorous water body in the pond of the invention.
Detailed Description
The present invention is further illustrated by the following figures and specific examples, which are to be understood as illustrative only and not as limiting the scope of the invention, which is to be given the full breadth of the appended claims and any and all equivalent modifications thereof which may occur to those skilled in the art upon reading the present specification.
As shown in the figure, the method for treating the black and odorous water body in the pond comprises the following steps:
step 1: injecting sewage: pumping or naturally flowing the sewage into the mixed anaerobic reaction zone.
Step 2: anaerobic reaction: adding a first coagulation mixing agent into the mixed anaerobic reaction zone for fully mixing and stirring, and firstly removing most pollutants in the polluted water body. And anaerobic reaction is carried out on the part of the precipitated and separated pollutants and the lower sludge in the polluted water body, so that the precipitated pollutants and the underwater sludge are further harmless, namely, part of heavy metal ions are removed and part of organic matters are degraded.
The anaerobic reaction mainly aims at the treatment of the sediment and the deposited sludge in front of the sludge dam. The anaerobic reaction is a pretreatment process of subsequent sludge treatment. The anaerobic reaction degree of the anaerobic reaction does not need to be strictly controlled. In principle, the longer the anaerobic reaction time, the better.
And step 3: primary precipitation: the water flow enters an inclined tube sedimentation zone for sedimentation, and suspended matters in the water body are removed. 100 percent of sludge deposited at the bottom of the inclined tube deposition area is refluxed to the mixed anaerobic reaction area through a submersible sewage pump to continue anaerobic reaction.
In general, the retention time of the water flow in the first inclined tube sedimentation area is controlled to be 30-60 minutes, and the effluent turbidity in the first inclined tube sedimentation area is controlled to be below 25 ℃.
And 4, step 4: anaerobic sludge backflow: 50% of anaerobic sludge at the bottom of the mixed anaerobic reaction zone is refluxed by using a submersible sewage pump, and the rest 50% of anaerobic sludge is sent to a sludge treatment zone for treatment. The anaerobic sludge backflow improves the strain concentration in the mixed anaerobic reaction area and enables the strains and pollutants to be fully mixed, so that the anaerobic reaction efficiency is improved.
And 5: aerobic reaction: so that the effluent of the inclined tube precipitation zone enters an aerobic reaction zone, and the aerobic biological treatment device carries out aerobic reaction.
In general, the aerobic reaction residence time is not less than 3 hours.
Step 6: aerobic sludge backflow: and a part of sludge deposited at the bottom of the aerobic reaction zone is refluxed and uniformly distributed on the surface of a reaction carrier of the aerobic biological treatment device by using a submersible sewage pump, so that the number of aerobic bacteria of the reaction carrier is increased. And sending the residual sludge to a sludge treatment area for treatment.
And 7: secondary precipitation: the effluent of the aerobic reaction zone enters an inclined tube sedimentation zone II; and adding a second coagulation mixing agent into the second inclined tube precipitation zone. And the inclined tube precipitation zone II is used for carrying out drug reaction and secondary precipitation. Further removing suspended matters in the water.
The retention time of the water flow in the second inclined tube precipitation area is controlled to be 30-60 minutes, and the effluent turbidity of the second inclined tube precipitation area is controlled to be below 15 ℃.
And 8: and 8: and (3) strengthening oxidation: water is discharged from the second sedimentation area; if the effluent reaches the standard, entering step 9; otherwise, entering a strong oxidation area for strong oxidation. The oxidation zone takes a strong oxidation material as a reaction carrier to further degrade pollutants in the sewage. After step 8, the treated water can reach or exceed four water body standards.
And step 9: discharging treated water: the water that completes step 8 is drained.
Further, the first coagulation mixing agent in the step 2 comprises a coagulant, mud and a weakly alkaline substance. The mud is added into the water body and mixed and stirred to make the water body turbid, and the aim is to wrap impurities or harmful substances in the water body and then precipitate. The precipitation rate of impurities or harmful substances is improved, and the decontamination rate of the water body is accelerated. The alkalescent substance is added to neutralize acidic substances in the sludge, accelerate the anaerobic reaction and efficiently degrade organic matters in the sludge.
Further, the second coagulation mixing agent in the step 7 comprises a coagulant and a slurry.
Furthermore, when the temperature of the water body is lower than 20 ℃, the heat pump system is started. The heat pump system supplies heat to the aerobic reaction zone, so that the aerobic reaction can still be normally carried out under the low-temperature condition.
Furthermore, anaerobic sludge is arranged at the bottom of the mixed anaerobic reaction zone in advance. The anaerobic sludge can be sludge precipitated in the mixed anaerobic reaction zone, and can also be digested sludge specially placed outside. The main purpose is to improve the concentration of anaerobic bacteria in the mixed anaerobic reaction zone and accelerate the degradation of organic matters.
Furthermore, the heat pump heating system comprises a heating pipe, an air source heat pump or a water source heat pump; the heat supply pipe is connected with an air source heat pump or a water source heat pump.
Claims (6)
1. A method for treating a black and odorous water body in a pond is characterized in that the black and odorous water body in the pond sequentially passes through a mixed anaerobic reaction zone, an inclined tube precipitation first zone, an aerobic reaction zone, an inclined tube precipitation second zone and a strong oxidation zone and is finally discharged, and the method comprises the following specific steps:
step 1: injecting sewage: pumping or naturally flowing the sewage into the mixed anaerobic reaction zone;
step 2: anaerobic reaction: adding a first coagulation mixing agent into the mixed anaerobic reaction zone, and stirring until the mixture is uniformly mixed;
and step 3: primary precipitation: conveying the sewage subjected to the step 2 to an inclined tube sedimentation first area for sedimentation, and refluxing 100% of sludge precipitated at the bottom of the inclined tube sedimentation first area to a mixed anaerobic reaction area through a submersible sewage pump for continuous anaerobic reaction;
and 4, step 4: anaerobic sludge backflow: refluxing 50% of anaerobic sludge at the bottom of the mixed anaerobic reaction zone by using a submersible sewage pump, and sending the rest 50% of anaerobic sludge to a sludge treatment zone for treatment;
and 5: aerobic reaction: the effluent of the first inclined tube sedimentation zone enters an aerobic reaction zone, and aerobic reaction is carried out through an aerobic biological treatment device;
step 6: aerobic sludge backflow: a part of sludge deposited at the bottom of the aerobic reaction zone is refluxed and uniformly distributed on the surface of a reaction carrier of the aerobic biological treatment device by using a submersible sewage pump; the residual bottom sludge is sent to a sludge treatment area for treatment;
and 7: secondary precipitation: adding a second coagulation mixing agent into the inclined tube precipitation zone II; the effluent of the aerobic reaction zone enters an inclined tube sedimentation zone II for sedimentation;
and 8: and (3) strengthening oxidation: water is discharged from the second sedimentation area; if the effluent reaches the standard, entering step 9; otherwise, entering a strong oxidation area for strong oxidation;
and step 9: discharging treated water: the water that completes step 8 is drained.
2. The method for treating the black and odorous water body in the pond according to claim 1, wherein the method comprises the following steps: the first coagulation mixed medicament in the step 2 comprises a coagulant, mud and alkalescent substances.
3. The method for treating the black and odorous water body in the pond according to claim 1, wherein the method comprises the following steps: the second coagulation mixing agent in the step 7 comprises a coagulant and mud.
4. The method for treating the black and odorous water body in the pond according to claim 1, wherein the method comprises the following steps: and when the temperature of the water body is lower than 20 ℃, starting a heat pump heating system of the aerobic reaction zone.
5. The method for treating the black and odorous water body in the pond according to claim 1, wherein the bottom of the mixed anaerobic reaction zone is pre-provided with anaerobic sludge.
6. The method for treating the black and odorous water body in the pond according to claim 4, wherein the method comprises the following steps: the heat pump heating system comprises a heating pipe, an air source heat pump or a water-ground source heat pump; the heat supply pipe is connected with an air source heat pump or a water source heat pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810870179.4A CN110790448A (en) | 2018-08-02 | 2018-08-02 | Method for treating black and odorous water body in river pond |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810870179.4A CN110790448A (en) | 2018-08-02 | 2018-08-02 | Method for treating black and odorous water body in river pond |
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| CN110790448A true CN110790448A (en) | 2020-02-14 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1412134A (en) * | 2002-12-13 | 2003-04-23 | 南开大学 | Urban domestic sewage treatment process and its method |
| US20050056588A1 (en) * | 2003-07-24 | 2005-03-17 | Petering John L. | Method and apparatus for the treatment of wastewater |
| CN106746223A (en) * | 2016-12-26 | 2017-05-31 | 天津城建大学 | Aerobic collaboration processing cutting liquid waste plant and the method for coagulation anaerobic hydrolysis |
| CN107487946A (en) * | 2017-09-21 | 2017-12-19 | 中交生态环保投资有限公司 | A kind of deflector type black and odorous water in-situ treatment system and processing method |
| CN107673561A (en) * | 2017-11-07 | 2018-02-09 | 中交生态环保投资有限公司 | A kind of black and odorous water in-situ treatment system and processing method |
-
2018
- 2018-08-02 CN CN201810870179.4A patent/CN110790448A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1412134A (en) * | 2002-12-13 | 2003-04-23 | 南开大学 | Urban domestic sewage treatment process and its method |
| US20050056588A1 (en) * | 2003-07-24 | 2005-03-17 | Petering John L. | Method and apparatus for the treatment of wastewater |
| CN106746223A (en) * | 2016-12-26 | 2017-05-31 | 天津城建大学 | Aerobic collaboration processing cutting liquid waste plant and the method for coagulation anaerobic hydrolysis |
| CN107487946A (en) * | 2017-09-21 | 2017-12-19 | 中交生态环保投资有限公司 | A kind of deflector type black and odorous water in-situ treatment system and processing method |
| CN107673561A (en) * | 2017-11-07 | 2018-02-09 | 中交生态环保投资有限公司 | A kind of black and odorous water in-situ treatment system and processing method |
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Application publication date: 20200214 |
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