CN110902965A - Sewage treatment method - Google Patents
Sewage treatment method Download PDFInfo
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- CN110902965A CN110902965A CN201911263634.5A CN201911263634A CN110902965A CN 110902965 A CN110902965 A CN 110902965A CN 201911263634 A CN201911263634 A CN 201911263634A CN 110902965 A CN110902965 A CN 110902965A
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- 239000010865 sewage Substances 0.000 title claims abstract description 96
- 238000011282 treatment Methods 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000001914 filtration Methods 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 58
- 241000196324 Embryophyta Species 0.000 claims description 36
- 239000002028 Biomass Substances 0.000 claims description 32
- 239000003610 charcoal Substances 0.000 claims description 31
- 238000007599 discharging Methods 0.000 claims description 21
- 238000004659 sterilization and disinfection Methods 0.000 claims description 21
- 238000004062 sedimentation Methods 0.000 claims description 17
- 238000005189 flocculation Methods 0.000 claims description 14
- 230000016615 flocculation Effects 0.000 claims description 14
- 239000012535 impurity Substances 0.000 claims description 14
- 239000010802 sludge Substances 0.000 claims description 14
- 244000005700 microbiome Species 0.000 claims description 11
- 238000005273 aeration Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 244000211187 Lepidium sativum Species 0.000 claims description 7
- 235000007849 Lepidium sativum Nutrition 0.000 claims description 7
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 7
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 7
- 238000001556 precipitation Methods 0.000 claims description 7
- 239000002689 soil Substances 0.000 claims description 7
- 239000008394 flocculating agent Substances 0.000 claims description 4
- 238000004065 wastewater treatment Methods 0.000 claims 3
- 239000002351 wastewater Substances 0.000 claims 2
- 240000003826 Eichhornia crassipes Species 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 11
- 238000000746 purification Methods 0.000 abstract description 7
- 238000000354 decomposition reaction Methods 0.000 abstract description 6
- 239000013043 chemical agent Substances 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 230000001376 precipitating effect Effects 0.000 abstract description 2
- 230000001954 sterilising effect Effects 0.000 abstract description 2
- 230000003311 flocculating effect Effects 0.000 abstract 1
- 239000000945 filler Substances 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 241000169203 Eichhornia Species 0.000 description 6
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 230000000813 microbial effect Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 235000015097 nutrients Nutrition 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 241000108664 Nitrobacteria Species 0.000 description 2
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 2
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000006396 nitration reaction Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011221 initial treatment Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005080 plant death Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
-
- 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
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses a sewage treatment method, which comprises the following treatment steps: (1) filtering by using a grating; (2) flocculating and precipitating; (3) aerobic treatment; (4) a natural biological pond; (5) filtering; (6) sterilizing; the sewage treatment method can effectively purify the sewage, the whole process flow is simple in equipment and operation, does not need to use chemical agents, is environment-friendly and safe, does not cause secondary pollution, purifies the sewage by utilizing the decomposition capacity of natural organisms, and has good purification effect and low cost.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a sewage treatment method.
Background
The sewage treatment is generally classified into production sewage treatment and domestic sewage treatment according to the classification of sewage sources. The production sewage comprises industrial sewage, agricultural sewage, medical sewage and the like, while the domestic sewage is sewage generated in daily life, which is a complex mixture of various forms of inorganic matters and organic matters, and the amount of the produced sewage is increased year by year along with the continuous development of productivity and the continuous improvement of the living standard of people, so that the sewage treatment is urgent.
The existing sewage treatment methods generally comprise a physical treatment method and a chemical treatment method, wherein the physical sewage treatment method is to separate solid matters, suspended matters and the like in sewage by using a fence and a sedimentation tank, and the simple physical sewage treatment can only carry out primary treatment on the sewage and cannot decompose organic matters in the sewage. The chemical sewage treatment method, such as ion exchange and chemical agent, removes suspended particles, organic substances, metal ions and the like in water, but has the problems of high cost, difficult agent recovery, easy secondary pollution and the like.
Disclosure of Invention
The invention aims to: the sewage treatment method can effectively purify sewage, the whole process flow equipment and operation are simple, chemical agents are not needed, the method is environment-friendly and safe, secondary pollution is avoided, the sewage is purified by utilizing the decomposition capacity of natural organisms, the purification effect is good, and the cost is low.
The technical scheme adopted by the invention is as follows:
in order to achieve the aim, the invention provides a sewage treatment method, which comprises the following treatment steps:
(1) and (3) grid filtration: introducing the sewage into a grating device to remove larger impurities and garbage;
(2) flocculation and precipitation: introducing sewage into a flocculation sedimentation tank, adding a pH regulator to regulate the pH to 6.5-7.5, adding a flocculating agent to carry out sedimentation, allowing the precipitated sludge to enter a sludge tank, and discharging the sewage to enter the next step of treatment;
(3) aerobic treatment: introducing sewage into the aerobic tank, and aerating the aerobic tank by an aeration device to oxidize and degrade organic matters;
(4) a natural biological pond: introducing sewage into a natural biological pond, planting aquatic plants in the natural biological pond, wherein the water surface coverage of the aquatic plants is 40-70%, and discharging the sewage after 10-15 days; the sewage is kept stand in a natural biological pond, nitrate nitrogen and ammonia nitrogen in the water body are gradually removed through the ways of aquatic plant absorption, microbial nitrification/denitrification, physical sedimentation, natural volatilization and the like, and meanwhile, the roots of the aquatic plants secrete organic matters, withered branches and fallen leaves and the decomposition effect of dead plant residues, so that the carbon-nitrogen ratio of the water body is further improved, the nitrogen removal rate is improved, and the water body is gradually improved;
(5) and (3) filtering: filtering the water to further remove residual small particle impurities in the water body;
(6) and (3) disinfection treatment: and introducing the water into a disinfection tank for disinfection to obtain qualified clear water and then discharging the clear water.
Preferably, the flocculating agent is polymeric ferric sulfate. The polyferric sulfate has excellent coagulation performance and high settling speed, can effectively reduce the turbidity of sewage, does not generate water phase transfer of toxic substances, and is safe, reliable and low in cost.
Preferably, the aerobic tank is internally provided with a microorganism filler. The microorganism treatment of loading on the microbial filler realizes the degradation of organic matters in the sewage, and the aeration device is matched to enhance the degradation rate and the degradation effect of the organic matters in the tank, so that the functions of dephosphorization and denitrogenation are achieved, and the sewage purification effect is improved.
Preferably, a macadam sublayer is arranged at the bottom in the natural biological pond, and a soil layer is arranged on the macadam sublayer. The aquatic plant root system growth is convenient, more nutrients are provided for the aquatic plant root system, and more survival carriers are provided for microorganisms in the natural biological pond.
Preferably, aquatic plants including water hyacinth, aquatic iris and cress are planted in the natural biological pond. The configuration of various types of aquatic plants can improve the diversity of plant species and is beneficial to enhancing the sewage treatment and purification capacity.
Preferably, in the step (4), the biomass charcoal is thrown into the natural biological pond every 8 hours in the first 5 days of the sewage treatment in the natural biological pond. The plant is harvested and carbonized to obtain the biomass charcoal material of the plant, the biomass charcoal material is thrown into a natural biological pond as a matrix, the biomass charcoal contains a large amount of elements such as K, Ca and Mg, the biomass charcoal is applied into the pond and then used as soluble nutrients to be utilized by the plant, the growth of the plant is promoted, the specific surface area of the biomass charcoal is large, multiple mesopores are cut, the adsorption of ammonia nitrogen is facilitated, the biomass charcoal is suitable for being used as a carrier for the growth and development of microorganisms, the biomass charcoal is environment-friendly and free of secondary pollution, meanwhile, the growth and the propagation of nitrobacteria and the occurrence of nitration reaction can be enhanced, the removal effect of the ammonia nitrogen is enhanced, the nitrogen removal capability of the natural biological pond is further enhanced.
Preferably, the amount of biomass char thrown is: 0.2kg of biomass charcoal is thrown in every 1 cubic meter of water body, and after 5 days of throwing, a stable biomass charcoal matrix layer is gradually formed in the natural biological pond, so that the guarantee is provided for the sewage treatment in the following days.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the invention finally purifies the sewage through a series of treatment processes of filtering, precipitating, aerobic treatment, natural biological decomposition, filtering and sterilizing, the whole process flow equipment and operation are simple, chemical agents are not needed, the invention is environment-friendly and safe, secondary pollution is not caused, and the sewage is purified by utilizing the decomposition capacity of natural organisms, the purification effect is good, and the cost is low.
2. According to the invention, by arranging the natural biological pond, the sewage is kept stand in the natural biological pond, and through the ways of aquatic plant absorption, microbial nitrification/denitrification, physical sedimentation, natural volatilization and the like, nitrate nitrogen and ammonia nitrogen in the water body are gradually removed, and meanwhile, the roots of the aquatic plants secrete organic matters, dead branches and fallen leaves and the decomposition effect of plant death residues, so that the carbon-nitrogen ratio of the water body is further improved, the nitrogen removal rate is improved, the water body is gradually improved, and the purification effect of the water body is improved.
3. According to the invention, the biomass charcoal material is thrown into the natural biological pond as a matrix, and the biomass charcoal contains a large amount of K, Ca, Mg and other elements, is used as a soluble nutrient after being applied into the pond and is utilized by plants, so that the growth of the plants is promoted, the biomass charcoal has a large specific surface area and multiple mesopores, is beneficial to the adsorption of ammonia nitrogen, is suitable for being used as a carrier for the growth and development of microorganisms, is environment-friendly and free from secondary pollution, and can enhance the growth and the propagation of nitrobacteria and the occurrence of nitration reaction, so that the removal effect of the ammonia nitrogen is enhanced, the denitrification capability of the natural biological pond is enhanced, and the sewage purification effect is improved.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A sewage treatment method comprises the following treatment steps:
(1) and (3) grid filtration: introducing the sewage into a grating device to remove larger impurities and garbage;
(2) flocculation and precipitation: introducing sewage into a flocculation sedimentation tank, adding a pH regulator to regulate the pH to 6.5-7.5, adding polymeric ferric sulfate to carry out sedimentation, allowing the precipitated sludge to enter a sludge tank, and discharging the sewage to enter the next step of treatment;
(3) aerobic treatment: introducing sewage into the aerobic tank, and aerating the aerobic tank by an aeration device to oxidize and degrade organic matters;
(4) a natural biological pond: introducing sewage into a natural biological pond, planting aquatic plants in the natural biological pond, wherein the water surface coverage of the aquatic plants is 60%, and discharging the sewage after 12 days;
(5) and (3) filtering: filtering the water to further remove residual small particle impurities in the water body;
(6) and (3) disinfection treatment: and introducing the water into a disinfection tank for disinfection to obtain qualified clear water and then discharging the clear water.
Wherein, a microorganism filler is arranged in the aerobic tank;
a macadam sublayer is arranged at the bottom in the natural biological pond, and a soil layer is arranged on the macadam sublayer;
aquatic plants including water hyacinth, aquatic iris and cress are planted in the natural biological pond;
in the step (4), biomass charcoal is thrown into the natural biological pond every 8 hours in the first 5 days of introducing the sewage into the natural biological pond for treatment, and the amount of the thrown biomass charcoal is as follows: 0.2kg of biomass charcoal is thrown in each 1 cubic meter of water.
Example 2
A sewage treatment method comprises the following treatment steps:
(1) and (3) grid filtration: introducing the sewage into a grating device to remove larger impurities and garbage;
(2) flocculation and precipitation: introducing sewage into a flocculation sedimentation tank, adding a pH regulator to regulate the pH to 6.5-7.5, adding polymeric ferric sulfate to carry out sedimentation, allowing the precipitated sludge to enter a sludge tank, and discharging the sewage to enter the next step of treatment;
(3) aerobic treatment: introducing sewage into the aerobic tank, and aerating the aerobic tank by an aeration device to oxidize and degrade organic matters;
(4) a natural biological pond: introducing sewage into a natural biological pond, planting aquatic plants in the natural biological pond, wherein the water surface coverage of the aquatic plants is 50%, and discharging the sewage after 10 days;
(5) and (3) filtering: filtering the water to further remove residual small particle impurities in the water body;
(6) and (3) disinfection treatment: and introducing the water into a disinfection tank for disinfection to obtain qualified clear water and then discharging the clear water.
Wherein, a microorganism filler is arranged in the aerobic tank;
a macadam sublayer is arranged at the bottom in the natural biological pond, and a soil layer is arranged on the macadam sublayer;
aquatic plants including water hyacinth, aquatic iris and cress are planted in the natural biological pond;
in the step (4), biomass charcoal is thrown into the natural biological pond every 8 hours in the first 5 days of introducing the sewage into the natural biological pond for treatment, and the amount of the thrown biomass charcoal is as follows: 0.2kg of biomass charcoal is thrown in each 1 cubic meter of water.
Example 3
A sewage treatment method comprises the following treatment steps:
(1) and (3) grid filtration: introducing the sewage into a grating device to remove larger impurities and garbage;
(2) flocculation and precipitation: introducing sewage into a flocculation sedimentation tank, adding a pH regulator to regulate the pH to 6.5-7.5, adding polymeric ferric sulfate to carry out sedimentation, allowing the precipitated sludge to enter a sludge tank, and discharging the sewage to enter the next step of treatment;
(3) aerobic treatment: introducing sewage into the aerobic tank, and aerating the aerobic tank by an aeration device to oxidize and degrade organic matters;
(4) a natural biological pond: introducing sewage into a natural biological pond, planting aquatic plants in the natural biological pond, wherein the water surface coverage of the aquatic plants is 40%, and discharging the sewage after 14 days;
(5) and (3) filtering: filtering the water to further remove residual small particle impurities in the water body;
(6) and (3) disinfection treatment: and introducing the water into a disinfection tank for disinfection to obtain qualified clear water and then discharging the clear water.
Wherein, a microorganism filler is arranged in the aerobic tank;
a macadam sublayer is arranged at the bottom in the natural biological pond, and a soil layer is arranged on the macadam sublayer;
aquatic plants including water hyacinth, aquatic iris and cress are planted in the natural biological pond;
in the step (4), biomass charcoal is thrown into the natural biological pond every 8 hours in the first 5 days of introducing the sewage into the natural biological pond for treatment, and the amount of the thrown biomass charcoal is as follows: 0.2kg of biomass charcoal is thrown in each 1 cubic meter of water.
Example 4
A sewage treatment method comprises the following treatment steps:
(1) and (3) grid filtration: introducing the sewage into a grating device to remove larger impurities and garbage;
(2) flocculation and precipitation: introducing sewage into a flocculation sedimentation tank, adding a pH regulator to regulate the pH to 6.5-7.5, adding polymeric ferric sulfate to carry out sedimentation, allowing the precipitated sludge to enter a sludge tank, and discharging the sewage to enter the next step of treatment;
(3) aerobic treatment: introducing sewage into the aerobic tank, and aerating the aerobic tank by an aeration device to oxidize and degrade organic matters;
(4) a natural biological pond: introducing sewage into a natural biological pond, planting aquatic plants in the natural biological pond, wherein the water surface coverage of the aquatic plants is 70%, and discharging the sewage after 11 days;
(5) and (3) filtering: filtering the water to further remove residual small particle impurities in the water body;
(6) and (3) disinfection treatment: and introducing the water into a disinfection tank for disinfection to obtain qualified clear water and then discharging the clear water.
Wherein, a microorganism filler is arranged in the aerobic tank;
a macadam sublayer is arranged at the bottom in the natural biological pond, and a soil layer is arranged on the macadam sublayer;
aquatic plants including water hyacinth, aquatic iris and cress are planted in the natural biological pond;
in the step (4), biomass charcoal is thrown into the natural biological pond every 8 hours in the first 5 days of introducing the sewage into the natural biological pond for treatment, and the amount of the thrown biomass charcoal is as follows: 0.2kg of biomass charcoal is thrown in each 1 cubic meter of water.
Example 5
A sewage treatment method comprises the following treatment steps:
(1) and (3) grid filtration: introducing the sewage into a grating device to remove larger impurities and garbage;
(2) flocculation and precipitation: introducing sewage into a flocculation sedimentation tank, adding a pH regulator to regulate the pH to 6.5-7.5, adding polymeric ferric sulfate to carry out sedimentation, allowing the precipitated sludge to enter a sludge tank, and discharging the sewage to enter the next step of treatment;
(3) aerobic treatment: introducing sewage into the aerobic tank, and aerating the aerobic tank by an aeration device to oxidize and degrade organic matters;
(4) a natural biological pond: introducing sewage into a natural biological pond, planting aquatic plants in the natural biological pond, wherein the water surface coverage of the aquatic plants is 60%, and discharging the sewage after 15 days;
(5) and (3) filtering: filtering the water to further remove residual small particle impurities in the water body;
(6) and (3) disinfection treatment: and introducing the water into a disinfection tank for disinfection to obtain qualified clear water and then discharging the clear water.
Wherein, a microorganism filler is arranged in the aerobic tank;
a macadam sublayer is arranged at the bottom in the natural biological pond, and a soil layer is arranged on the macadam sublayer;
aquatic plants including water hyacinth, aquatic iris and cress are planted in the natural biological pond;
in the step (4), biomass charcoal is thrown into the natural biological pond every 8 hours in the first 5 days of introducing the sewage into the natural biological pond for treatment, and the amount of the thrown biomass charcoal is as follows: 0.2kg of biomass charcoal is thrown in each 1 cubic meter of water.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not cause the essence of the corresponding technical solution to depart from the scope of the technical solution of the embodiments of the present invention, and are intended to be covered by the claims and the specification of the present invention.
Claims (7)
1. A sewage treatment method is characterized by comprising the following treatment steps:
(1) and (3) grid filtration: introducing the sewage into a grating device to remove larger impurities and garbage;
(2) flocculation and precipitation: introducing sewage into a flocculation sedimentation tank, adding a pH regulator to regulate the pH to 6.5-7.5, adding a flocculating agent to carry out sedimentation, allowing the precipitated sludge to enter a sludge tank, and discharging the sewage to enter the next step of treatment;
(3) aerobic treatment: introducing sewage into the aerobic tank, and aerating the aerobic tank by an aeration device to oxidize and degrade organic matters;
(4) a natural biological pond: introducing sewage into a natural biological pond, planting aquatic plants in the natural biological pond, wherein the water surface coverage of the aquatic plants is 40-70%, and discharging the sewage after 10-15 days;
(5) and (3) filtering: filtering the water to further remove residual small particle impurities in the water body;
(6) and (3) disinfection treatment: and introducing the water into a disinfection tank for disinfection to obtain qualified clear water and then discharging the clear water.
2. The wastewater treatment method according to claim 1, wherein the flocculating agent is polymeric ferric sulfate.
3. The wastewater treatment method according to claim 1, wherein the aerobic tank is filled with microorganism.
4. The sewage treatment method according to claim 1, wherein a macadam sublayer is arranged at the bottom of the natural biological pond, and a soil layer is arranged on the macadam sublayer.
5. The method of claim 1, wherein the natural pond is populated with aquatic plants including water hyacinth, iris, and cress.
6. The method for treating wastewater according to claim 1, wherein in the step (4), the biomass charcoal is thrown into the natural biological pond every 8 hours for 5 days before the wastewater is treated by the natural biological pond.
7. The wastewater treatment method according to claim 6, wherein in the step (4), the amount of the biomass charcoal thrown is: 0.2kg of biomass charcoal is thrown in each 1 cubic meter of water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911263634.5A CN110902965A (en) | 2019-12-11 | 2019-12-11 | Sewage treatment method |
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| CN201911263634.5A CN110902965A (en) | 2019-12-11 | 2019-12-11 | Sewage treatment method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113943086A (en) * | 2021-11-16 | 2022-01-18 | 山西交控生态环境股份有限公司 | Comprehensive sewage treatment and resource utilization method for expressway operation station area |
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| CN106430808A (en) * | 2016-08-05 | 2017-02-22 | 广东环院环境工程有限公司 | Treatment process of wet blue leather processing wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113943086A (en) * | 2021-11-16 | 2022-01-18 | 山西交控生态环境股份有限公司 | Comprehensive sewage treatment and resource utilization method for expressway operation station area |
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