CN111252995A - Sewage nitrogen and phosphorus removal method - Google Patents
Sewage nitrogen and phosphorus removal method Download PDFInfo
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- CN111252995A CN111252995A CN201811458773.9A CN201811458773A CN111252995A CN 111252995 A CN111252995 A CN 111252995A CN 201811458773 A CN201811458773 A CN 201811458773A CN 111252995 A CN111252995 A CN 111252995A
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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
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- C02F3/02—Aerobic 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
- C02F3/28—Anaerobic digestion 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
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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
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
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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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- 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)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention relates to a sewage nitrogen and phosphorus removal method, which comprises a regulating tank step, an anoxic tank step, an aerobic tank step, a secondary sedimentation tank step and a water hyacinth ecological filter tank step; compared with the existing chemical method and physical method for treating pollutants such as ammonia, nitrogen, phosphorus and the like in sewage, the method for purifying sewage by using the water hyacinth ecological filter tank has the advantages of low operation cost, energy conservation, simplicity, cheapness and unique effect (the removal rate of nitrogen and phosphorus can reach more than 98%), and is suitable for small-sized economic development areas with more idle rural areas and dispersivity, polluted reservoirs, lakes and the like. In addition, the water hyacinth is edible, and because the water hyacinth grows and breeds quickly, excessive water hyacinth which needs to be fished out regularly can be used for producing products such as food, beverage, feed, chemical fertilizer and the like, so that the sewage can be purified and treated, and double benefits can be brought.
Description
Technical Field
The invention relates to a sewage denitrification and dephosphorization treatment process, belonging to the technical field of sewage treatment in environmental protection.
Background
Nitrogen and phosphorus are important biological nutrient sources, and with the common use of chemical fertilizers, detergents and pesticides, the content of nitrogen and phosphorus in natural water is increased rapidly, blue-green algae and green algae in the water are propagated in large quantities, and the water is anoxic and generates toxins, so that the water quality is deteriorated, and great harm is caused to aquatic organisms and human health. In the technical field of domestic wastewater treatment, the nitrogen and phosphorus removal of wastewater still adopts the traditional chemical method or physical method to carry out nitrogen and phosphorus removal, so that the operation cost is high and the sewage treatment capacity is large.
Disclosure of Invention
The invention aims to solve the technical problems that the operation cost is high, the limit value of nitrogen and phosphorus removal of wastewater and the effluent ammonia nitrogen phosphorus pollutant can not reach the standard in the prior art.
In order to solve the above problems, the technical scheme adopted by the invention is as follows: a method for removing nitrogen and phosphorus from sewage is characterized by comprising the following steps: comprises a regulating tank step, an anoxic tank step, an aerobic tank step, a secondary sedimentation tank step and a water hyacinth ecological filter tank step;
a step of adjusting a pool: a grid is arranged in front of the regulating tank to intercept large suspended pollutants in the sewage, and the suspended pollutants intercepted by the grid are manually and periodically cleaned;
an anoxic pond step: a lifting pump is arranged in the regulating tank, water in the regulating tank is lifted to the anoxic tank, and the lifting pump is controlled by a liquid level floating ball in the regulating tank;
an aeration device is arranged at the bottom in the anoxic tank, the aeration device is perforated for aeration, suspension ball fillers are placed in the anoxic tank, heterotrophic bacteria in the anoxic tank hydrolyze suspended pollutants such as starch, fibers and carbohydrates and soluble organic matters in sewage into organic acid, so that macromolecular organic matters are decomposed into micromolecular organic matters, and insoluble organic matters are converted into soluble organic matters;
an aerobic tank step: the effluent of the anoxic tank automatically flows into the aerobic tank, the bottom of the aerobic tank is provided with an aeration device which is a microporous aeration disc type aeration, suspended ball fillers are also placed in the aerobic tank, under the condition of sufficient oxygen supply, the products of anoxic hydrolysis in the aerobic tank are subjected to thorough oxidative decomposition of micromolecular organic matters and soluble organic matters, and the nitrification of autotrophic bacteria is used for carrying out NH (ammonia) nitrification3-N（NH4To NO by oxidation of ++)3Return to the anoxic tank under reflux control, under anoxic conditions, denitrification of the heterotrophic bacteria for NO3Reduction to molecular nitrogen (N)2) Complete C, N, O cycle in ecology;
a secondary sedimentation tank step: the effluent of the aerobic tank automatically flows into a secondary sedimentation tank, the secondary sedimentation tank adopts vertical flow type water distribution, sludge is settled at the bottom of the secondary sedimentation tank, clear water flows out from an overflow weir of the secondary sedimentation tank, and the effluent automatically flows into a rear water hyacinth biological filter;
the method comprises the following steps of: a plurality of water hyacinth ecological filter tanks are connected in series to carry out captive breeding on water hyacinth, sewage slowly flows through the water hyacinth ecological filter tanks, the flow is controlled within seven days, the water depth is controlled to be 1.5m, and the treated water is discharged after reaching the standard.
By adopting the technical scheme, compared with the prior art, the invention has the following advantages: compared with the existing chemical method and physical method for treating pollutants such as ammonia, nitrogen, phosphorus and the like in sewage, the method for purifying sewage by using the water hyacinth ecological filter tank has the advantages of low operation cost, energy conservation, simplicity, cheapness and unique effect (the removal rate of nitrogen and phosphorus can reach more than 98%), and is suitable for small-sized economic development areas with more idle rural areas and dispersivity, polluted reservoirs, lakes and the like. In addition, the water hyacinth is edible, and because the water hyacinth grows and breeds quickly, excessive water hyacinth which needs to be fished out regularly can be used for producing products such as food, beverage, feed, chemical fertilizer and the like, so that the sewage can be purified and treated, and double benefits can be brought.
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a flow chart of a method for removing nitrogen and phosphorus from wastewater in an embodiment of the invention.
Detailed Description
In the embodiment, as shown in fig. 1, a water hyacinth sewage treatment device comprises a regulating tank, an anoxic tank, an aerobic tank, a secondary sedimentation tank and a plurality of water hyacinth ecological filter tanks which are communicated in series.
A grid is arranged in front of the regulating tank to intercept large suspended pollutants in the sewage, otherwise, the large suspended pollutants enter a subsequent process facility to block a pump or a process pipeline of a subsequent unit, so that the subsequent process is influenced, and things intercepted by the grid are manually and periodically cleaned.
The regulating tank is internally provided with a lifting pump, water in the regulating tank is lifted into the anoxic tank, and the lifting pump is controlled by a liquid level floating ball in the regulating tank. The bottom of the anoxic tank is provided with an aeration device (the aeration device is a perforation aeration) in which a suspension ball filler is placed, the aeration device is used for playing a role of a biomembrane carrier and has a function of intercepting suspended matters, and the anoxic tank has the characteristics of strong biological adhesive force, large specific surface area, high porosity, good chemical and biological stability, durability, no harmful substances dissolved out, no secondary pollution, ultraviolet resistance, ageing resistance, strong hydrophilic performance and the like. Heterotrophic bacteria in the anoxic pond hydrolyze suspended pollutants such as starch, fiber, carbohydrate and the like and soluble organic matters in the sewage into organic acid, so that macromolecular organic matters are decomposed into micromolecular organic matters, and insoluble organic matters are converted into soluble organic matters.
The effluent of the anoxic tank automatically flows into the aerobic tank, the bottom of the aerobic tank is also provided with an aeration device (the aeration device is a microporous aeration disc type aeration) and the tank is also provided with suspended ball fillers, under the condition of sufficient oxygen supply, the products of anoxic hydrolysis in the aerobic tank are subjected to thorough oxidative decomposition of micromolecule organic matters and soluble organic matters, and the nitrification of autotrophic bacteria is used for carrying out NH (ammonia) oxidation decomposition3-N（NH4To NO by oxidation of ++)3Return to the anoxic tank under reflux control, under anoxic conditions, denitrification of the heterotrophic bacteria for NO3Reduction to molecular nitrogen (N)2) C, N, O the ecological cycle is completed to remove organic matter.
The effluent of the aerobic tank automatically flows into a secondary sedimentation tank, the secondary sedimentation tank mainly adopts vertical flow type water distribution, the effect is mainly to separate sludge, the mixed liquid is clarified and concentrated, the sludge is settled at the bottom of the tank, clear water flows out from an overflow weir of the secondary sedimentation tank, the effluent automatically flows into a following water hyacinth biological filter tank, because the growth and propagation speed of the water hyacinth is high, the biological filter tank mainly adopts a plurality of series tanks to culture the water hyacinth, the sewage slowly flows through, the process is controlled to be about seven days, namely the sewage and the water hyacinth coexist for seven days to achieve the aim of purifying the water (for example, the sewage quantity is about 10 cubic days, about 70 cubic is needed for the biological filter tank, the depth of the biological filter tank is 1.3m to 1.8m under the general condition), the huge root of the water hyacinth is required to continuously absorb pollutants in the water, absorb a large amount of nutrient elements such as nitrogen, phosphorus, potassium and the like in the water, and under the proper condition, the water hyacinth can discharge 800 people, Phosphorus is absorbed the same day. And in a conventional sewage treatment plant, pollutants such as soluble nitrogen, phosphorus and the like are difficult to effectively remove, toxic metals such as lead, mercury, cadmium and the like can be sucked from sewage, and a sterilization factor can be secreted to the surrounding environment, so that the number of saprophytic bacteria and escherichia coli can be greatly reduced. Therefore, the water hyacinth biofilter is used as a subsequent treatment process of sewage, and the disinfection process of sewage is saved.
In addition, due to the incredible growth and reproduction speed of the water hyacinth, the density of the water hyacinth is also controlled to avoid ecological imbalance, and the water hyacinth which excessively grows and dies is fished out. If the water is allowed to grow freely and is self-generated and self-extinguished, new putrefaction products can be generated, and the effect of purifying water cannot be achieved. In addition, the water hyacinth is an edible plant and can be processed, refined and prepared into organic fertilizer or feed and the like. Therefore, the water hyacinth used as the ecological biofilter can be comprehensively utilized to form double benefits of environmental protection and biological industry. Can bring additional benefits of other industries while purifying sewage.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. A method for removing nitrogen and phosphorus from sewage is characterized by comprising the following steps: comprises a regulating tank step, an anoxic tank step, an aerobic tank step, a secondary sedimentation tank step and a water hyacinth ecological filter tank step;
a step of adjusting a pool: a grid is arranged in front of the regulating tank to intercept large suspended pollutants in the sewage, and the suspended pollutants intercepted by the grid are manually and periodically cleaned;
an anoxic pond step: a lifting pump is arranged in the regulating tank, water in the regulating tank is lifted to the anoxic tank, and the lifting pump is controlled by a liquid level floating ball in the regulating tank;
an aeration device is arranged at the bottom in the anoxic tank, the aeration device is perforated for aeration, suspension ball fillers are placed in the anoxic tank, heterotrophic bacteria in the anoxic tank hydrolyze suspended pollutants such as starch, fibers and carbohydrates and soluble organic matters in sewage into organic acid, so that macromolecular organic matters are decomposed into micromolecular organic matters, and insoluble organic matters are converted into soluble organic matters;
an aerobic tank step: the effluent of the anoxic tank automatically flows into the aerobic tank, the bottom of the aerobic tank is provided with an aeration device which is a microporous aeration disc type aeration, suspended ball fillers are also placed in the aerobic tank, under the condition of sufficient oxygen supply, the products of anoxic hydrolysis in the aerobic tank are subjected to thorough oxidative decomposition of micromolecular organic matters and soluble organic matters, and the nitrification of autotrophic bacteria is used for carrying out NH (ammonia) nitrification3-N（NH4To NO by oxidation of ++)3Return to the anoxic tank under reflux control, under anoxic conditions, denitrification of the heterotrophic bacteria for NO3Reduction to molecular nitrogen (N)2) Complete C, N, O cycle in ecology;
a secondary sedimentation tank step: the effluent of the aerobic tank automatically flows into a secondary sedimentation tank, the secondary sedimentation tank adopts vertical flow type water distribution, sludge is settled at the bottom of the secondary sedimentation tank, clear water flows out from an overflow weir of the secondary sedimentation tank, and the effluent automatically flows into a rear water hyacinth biological filter;
the method comprises the following steps of: a plurality of water hyacinth ecological filter tanks are connected in series to carry out captive breeding on water hyacinth, sewage slowly flows through the water hyacinth ecological filter tanks, the flow is controlled within seven days, the water depth is controlled to be 1.5m, and the treated water is discharged after reaching the standard.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811458773.9A CN111252995A (en) | 2018-11-30 | 2018-11-30 | Sewage nitrogen and phosphorus removal method |
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| CN201811458773.9A CN111252995A (en) | 2018-11-30 | 2018-11-30 | Sewage nitrogen and phosphorus removal method |
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| CN111252995A true CN111252995A (en) | 2020-06-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113307356A (en) * | 2021-05-18 | 2021-08-27 | 曲阜师范大学 | Fishpond culture tail water purification and conditioning integrated equipment and tail water treatment method thereof |
| CN113816570A (en) * | 2021-11-23 | 2021-12-21 | 广东新泰隆环保集团有限公司 | Sewage treatment device for biologically enhancing deep nitrogen and phosphorus removal |
| CN115521024A (en) * | 2022-09-23 | 2022-12-27 | 江苏东方生态清淤工程有限公司 | Algae sludge online mechanical drying and residual water purification system and method |
-
2018
- 2018-11-30 CN CN201811458773.9A patent/CN111252995A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113307356A (en) * | 2021-05-18 | 2021-08-27 | 曲阜师范大学 | Fishpond culture tail water purification and conditioning integrated equipment and tail water treatment method thereof |
| CN113816570A (en) * | 2021-11-23 | 2021-12-21 | 广东新泰隆环保集团有限公司 | Sewage treatment device for biologically enhancing deep nitrogen and phosphorus removal |
| CN115521024A (en) * | 2022-09-23 | 2022-12-27 | 江苏东方生态清淤工程有限公司 | Algae sludge online mechanical drying and residual water purification system and method |
| CN115521024B (en) * | 2022-09-23 | 2024-09-20 | 江苏东方生态清淤工程有限公司 | Algae sludge on-line mechanical drying and residual water purifying system and method thereof |
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Application publication date: 20200609 |