CN112320956A - Series-type multistage drop oxygenation small-sized sewage treatment system - Google Patents
Series-type multistage drop oxygenation small-sized sewage treatment system Download PDFInfo
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- CN112320956A CN112320956A CN202011389767.XA CN202011389767A CN112320956A CN 112320956 A CN112320956 A CN 112320956A CN 202011389767 A CN202011389767 A CN 202011389767A CN 112320956 A CN112320956 A CN 112320956A
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
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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
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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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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Abstract
The invention provides a series-connection type multistage drop water oxygenation small-sized sewage treatment system, which solves the problems of high difficulty in distributed sewage treatment and poor treatment effect in the prior art. The treatment system comprises a plurality of treatment modules connected in series, wherein a water inlet pool is arranged at the upstream of the first treatment module, and a sedimentation pool is arranged at the downstream of the last treatment module; the height of the treatment modules is gradually reduced, each treatment module comprises an anaerobic tank and an aerobic tank which are sequentially communicated, the height of the anaerobic tank in the same treatment module is higher than that of the aerobic tank, and the anaerobic tank and the aerobic tank of the adjacent treatment module are communicated.
Description
Technical Field
The invention relates to the technical field of sewage treatment equipment, in particular to a sewage treatment system which is modular in combination, flexible in installation, energy-saving and consumption-reducing.
Background
According to statistics, the total amount of sewage discharged in 2019 in China reaches 838 hundred million m3Wherein the centralized processing is 589 billion m3Decentralized sewage treatment 240 hundred million m3Distributed sewage treatment accounts for 28.7% of the total sewage discharge. The distributed sewage treatment has the following characteristics: (1) the distributed sewage treatment system has the advantages of small control population, small amount of generated sewage, dispersed residential buildings or small-sized building facilities and difficult sewage collection. (2) The distributed sewage is irregularly distributed in time and space, the water quantity is unstable, and the time variation is large. (3) Due to the development of social economy, the living standard is promoted year by year, the amount of generated sewage is continuously increased, the water distribution is irregular, and the direct influence is causedThe scale and the process selection of the sewage treatment facility construction are realized. After a sewage treatment process is selected and investment is built, the sewage treatment process becomes obsolete soon and has to be discarded, and the investment benefit is seriously influenced. (4) The distributed sewage has wide source types, complex pollution types and great influence by regions and climates. Therefore, how to select distributed sewage treatment facilities and treatment processes according to local conditions is a new subject of sewage discharge treatment at home and abroad at present. At present, the research make internal disorder or usurp on the dispersed sewage treatment technology in China is still in the beginning stage, the dispersed sewage treatment system does not have a complete system, and the most appropriate treatment method for treating the dispersed discharged sewage is not found yet.
Disclosure of Invention
The invention provides a series-connection type multistage drop water oxygenation small-sized sewage treatment system, which solves the problems of high difficulty and poor treatment effect of dispersed sewage treatment in the prior art.
The technical scheme of the invention is realized as follows: a series-connection type multistage drop oxygenation small-sized sewage treatment system comprises a plurality of treatment modules which are connected in series, wherein a water inlet pool is arranged at the upstream of the first treatment module, and a sedimentation pool is arranged at the downstream of the last treatment module;
the height of the treatment modules is gradually reduced, each treatment module comprises an anaerobic tank and an aerobic tank which are sequentially communicated, the height of the anaerobic tank in the same treatment module is higher than that of the aerobic tank, and the anaerobic tank and the aerobic tank of the adjacent treatment module are communicated.
As a preferred embodiment, the anaerobic tank is made of stainless steel, and has a cuboid structure of 5 × 3 × 1.5m, and the installation inclination angle of the anaerobic tank is 10-15 °;
the anaerobic tank is also internally provided with a filler and a partition plate, the partition plate is arranged at 2/3 of the length of the anaerobic tank, and the distance between the partition plate and the bottom of the anaerobic tank is 0.3 m;
the water drop height of the water outlet of the anaerobic tank is 0.5 m.
In a preferred embodiment, the height difference between the aerobic tank of the previous treatment module and the anaerobic tank of the next treatment module is 0.1 m.
As a preferable embodiment, a filler and a partition plate are arranged in the aerobic tank, and a blow-down pipe is fixedly arranged at the bottom of the aerobic tank.
In a preferred embodiment, each of the treatment modules is provided with a water outlet.
After the technical scheme is adopted, the invention has the beneficial effects that: the sewage treatment system of the invention is structurally designed with a multi-stage contact oxidation sewage treatment system and a drop oxygenation mode, thereby realizing the purposes of energy saving and consumption reduction. The method adopts modular combination, has strong process flexibility, and improves and optimizes a single contact oxidation technology. The prominent bright spots are: the combined form of the modular sewage treatment reactor, the multistage drop oxygenation and the novel filler forms a brand new matched sewage treatment system. And adopt multistage sewage treatment system, can be according to actual conditions, nimble installation, design multistage sewage treatment module until the play water meets the requirement standard completely.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art 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 for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is a schematic structural diagram of an anaerobic tank of the present invention;
FIG. 3 is a schematic structural diagram of an aerobic tank according to the present invention;
in the figure: 1-water inlet of anaerobic pool; 2-a filler; 3-a separator; 4-drop baffles; 5-emptying pipe; 6-water outlet of the aerobic tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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.
As shown in FIG. 1, the process flow diagram of the tandem type multistage drop water oxygenation small-sized sewage treatment system of the invention comprises a plurality of treatment modules which are connected in series, the process flow diagram provides three-stage sewage treatment, and in production practice, more sewage treatment modules can be designed according to the requirements on sewage treatment.
After the sewage is treated by the multi-stage sewage treatment module, the sewage is precipitated and discharged. Each stage of treatment module is composed of an anaerobic tank and an aerobic tank together, and each stage can be regarded as an independent contact oxidation process. The water outlet is arranged behind each stage of treatment module, so that whether the sewage treatment reaches the standard can be conveniently tracked and monitored.
The multi-stage sewage treatment module is arranged, so that anaerobic and aerobic reaction treatment can be alternately operated, the sewage treatment effect is improved, and the removal of ammonia nitrogen and total phosphorus is enhanced. And secondly, the chance of water drop is created, dissolved oxygen can be supplemented, and the energy consumption is reduced while the treatment effect is improved.
As shown in fig. 2 and fig. 3, the structure of the anaerobic tank and the aerobic tank are respectively shown, and the anaerobic tank has the following characteristics:
1. adopt stainless steel, construct into rectangular cell body, single cell body size: the length multiplied by the width multiplied by the height multiplied by 5 multiplied by 3 multiplied by 1.5m, and the installation inclination angle of the anaerobic tank is 10-15 degrees.
2. Anaerobic tank clapboard
Set up filler 2 and baffle 3 in the anaerobism pond, the mounted position of baffle 3 is in the long 2/3 departments of pond body, and the baffle is apart from bottom 0.3m, and through contrast observation, the baffle adopts the perps interval to be 4cm, and the baffle of seam width 3 mm.
3. Drop water outlet
Through repeated tests, concrete structures such as a water outlet form, a water drop height, an aerobic-anaerobic tank connection form and the like are obtained
The water dropping height (namely the height of the water dropping baffle 4) of the water outlet of the anaerobic tank is as follows: 0.5 m;
the height difference between the upper stage aerobic pool and the lower stage anaerobic pool is 0.1 m;
the aerobic tank and the anaerobic tank are in descending trend in sequence, and a water inlet tank is arranged at the foremost end of the whole system;
the shape of the water outlet can be made into a triangle or an isosceles trapezoid;
angle of triangular water outlet: 30 degrees to 45 degrees;
inclined inner angle of the trapezoidal water outlet: 30 °, base width: 30 cm.
The aerobic tank is similar to the anaerobic tank in structure and is also of a rectangular tank body structure, a partition plate 3 is arranged, the tank is filled with filler 2, and a vent pipe 5 is arranged at the bottom of the tank. The main function of the aerobic tank is to treat and degrade BOD \ COD in the sewage; digestion and reverse digestion, and removal of ammonia nitrogen and the like in the sewage.
For the filler 2 in the anaerobic tank and the aerobic tank, a lightweight high-porosity biological ceramic filter material is adopted, and the filler has the following characteristics:
rich surface micropores, large specific surface area, easy film formation, large biomass and no pollution to NH3N, COD, the removing effect is good, the pollutant intercepting capability is strong, and the quality of the treated effluent is high;
secondly, the pores of the filter material layer are uniformly distributed, and the surface pore diameter is a mesopore and a macropore suitable for the growth of microorganisms, so that the problems of large head loss, easy blockage and hardening caused by nonuniform pore distribution of the filter material layer are solved;
moderate density, uniform specific gravity, short time required by back washing, long service cycle and low energy consumption, overcomes the defects of difficult control and easy material running, and saves electricity and labor;
good grain size grading is adopted, the pollutant carrying capacity is strong, the utilization rate of filter materials is high, the head loss is increased slowly, the filtering speed can reach 16m/h under the same condition, the working period is more than 24h, and the period water yield reaches 800-1000 m-3/m21.5-2 times of the quartz sand filter material;
the material does not contain any substance harmful to human body and environment, and has good biological, chemical and thermodynamic stability;
sixthly, the ceramic filter material has high mechanical strength and good abrasion resistance, the surface of the ceramic filter material is positively charged, and the surface of most microorganisms is negatively charged, so that the novel ceramic filter material is beneficial to the adsorption and growth of the microorganisms.
And in addition, the novel ceramic filter material has light specific gravity, is beneficial to back flushing of the biological aerated filter, and can achieve the purposes of energy conservation and low consumption.
And (3) analyzing the specific treatment effect:
compared with the discharge standard of pollutants for municipal wastewater treatment plants GB18918-2002, the basic control project standard (see the following table).
Note: the following is performed according to the removal rate index: when the COD of the inlet water is more than 350mg/L, the removal rate is more than 60 percent; when BOD is more than 160mg/L, the removal rate should be more than 50%. The outside value of the bracket is a control index when the water temperature is more than 12 ℃, and the inside value of the bracket is a control index when the water temperature is less than or equal to 12 ℃.
1. Removal effect of different hydraulic retention time
The hydraulic retention time and influent water concentration are designed as shown in the following table
Removal effect of COD (chemical oxygen demand) with different hydraulic retention time
After the treatment of the three-stage unit, the COD is reduced to 44.8mg/l from the original inlet water concentration value, and the corresponding total removal efficiency of the COD is 89.12 percent. By comparing the pollutant removal effects of different hydraulic retention times, when the hydraulic retention time is 6 hours, the treatment effect of COD reaches the first-class A standard of GB18918-2002 pollutant discharge Standard of urban Sewage treatment plant.
Ammonia nitrogen removal effect at different hydraulic retention times
After the treatment of the three-stage unit, the concentration value of the ammonia nitrogen is reduced to 4.41mg/l from the original inlet water concentration value, and the standard of the first-stage A is achieved.
Removal effect of different hydraulic retention times TP
After the treatment of the three-stage unit, the concentration value of the ammonia nitrogen is reduced to 0.48mg/l from the original inlet water concentration value, and the standard of the first-stage A is achieved.
2. Effect of removing different aeration amount
The design of different aeration rates and feed water concentrations is shown in the following table
Removal effect of COD (chemical oxygen demand) with different aeration quantities
An observation experiment proves that when the aeration rate is 400L/h, the average value of the effluent of COD is 50.2mg/L, and the average value of the total removal rate is 87.66 percent; when the aeration rate is 600L/h, the average value of the effluent after the COD is subjected to three-stage reaction is 40.8mg/L, and the average value of the total removal rate is 90.8%. The aeration rate can reach the requirement of effluent standard at 400L/h and 600L/h.
Ammonia nitrogen removal effect with different aeration amounts
When the aeration rate is 400L/h, the average value of ammonia nitrogen effluent is 4.99mg/L, and the average value of total removal rate is 60.83%; when the aeration rate is 600L/h, the average ammonia nitrogen effluent is 2.57mg/L, and the average total removal rate is 68.26%. When the aeration rate is 400L/h and 600L/h, the ammonia nitrogen can reach the discharge standard.
Removal effect of TP with different aeration amounts
When the aeration rate is 400L/h, the average value of the effluent of TP after three-stage reaction is 0.58mg/L, and the average value of the total removal rate is 64.14 percent; when the aeration rate is 600L/h, the average value of the effluent of TP after three-stage reaction is 0.33mg/L, the average value of the total removal rate is 73.35%, and the effluent reaches the first-stage A discharge standard.
3. Removal effect of different inlet water concentrations
An observation experiment was performed for four influent concentrations. See the following Table
COD removing effect under different water inlet concentrations
The effluent of the COD can basically reach the discharge standard after the secondary reaction; under the fourth load, the removal rate of each stage is 51.13%, 26.13% and 11.51%, and COD under the load can reach the discharge standard through the first-stage reaction.
Ammonia nitrogen removal effect under different influent water concentrations
The effluent reaches the standard after the first-stage reaction.
TP removal effect under different influent water concentrations
The average value of the effluent of the three-stage reaction of TP is 0.47mg/l, and the total removal rate is 68.58%.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. The utility model provides a small-size sewage treatment system of multistage drop oxygen filling of serial-type which characterized in that: the system comprises a plurality of treatment modules connected in series, wherein a water inlet pool is arranged at the upstream of the first treatment module, and a sedimentation pool is arranged at the downstream of the last treatment module;
the height of the treatment modules is gradually reduced, each treatment module comprises an anaerobic tank and an aerobic tank which are sequentially communicated, the height of the anaerobic tank in the same treatment module is higher than that of the aerobic tank, and the anaerobic tank and the aerobic tank of the adjacent treatment module are communicated.
2. The tandem type multistage drop and oxygenation small-scale sewage treatment system of claim 1, wherein: the anaerobic tank is made of stainless steel materials and is of a cuboid structure of 5 multiplied by 3 multiplied by 1.5m, and the installation inclination angle of the anaerobic tank is 10-15 degrees;
the anaerobic tank is also internally provided with a filler and a partition plate, the partition plate is arranged at 2/3 of the length of the anaerobic tank, and the distance between the partition plate and the bottom of the anaerobic tank is 0.3 m;
the water drop height of the water outlet of the anaerobic tank is 0.5 m.
3. The tandem type multistage drop and oxygenation small-scale sewage treatment system of claim 1, wherein: the height difference between the aerobic tank of the previous-stage treatment module and the anaerobic tank of the next-stage treatment module is 0.1 m.
4. The tandem type multistage drop and oxygenation small-scale sewage treatment system of claim 1, wherein: the aerobic tank is internally provided with a filler and a partition plate, and the bottom of the aerobic tank is fixedly provided with a blow-down pipe.
5. The tandem type multistage drop and oxygenation small-scale sewage treatment system of claim 1, wherein: each processing module is provided with a water outlet.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20130256224A1 (en) * | 2010-12-24 | 2013-10-03 | Boying Xiamen Science And Technology Co., Ltd. | Tanning wastewater treatment and reuse apparatus and method therefor |
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| CN208776533U (en) * | 2018-08-21 | 2019-04-23 | 四川省环保科技工程有限责任公司 | For purifying the unpowered processing system of mountain area sanitary sewage |
| CN110028150A (en) * | 2019-04-28 | 2019-07-19 | 江苏省中国科学院植物研究所 | A kind of modularization coupling sewage disposal system |
| CN110482701A (en) * | 2019-08-29 | 2019-11-22 | 安徽建筑大学 | A kind of distribution water inlet multistage AO series connection high efficiency biological denitrification system and method |
| CN111732141A (en) * | 2020-08-04 | 2020-10-02 | 安徽马钢矿业资源集团南山矿业有限公司 | Unpowered purifier of circulating water |
-
2020
- 2020-12-02 CN CN202011389767.XA patent/CN112320956A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130256224A1 (en) * | 2010-12-24 | 2013-10-03 | Boying Xiamen Science And Technology Co., Ltd. | Tanning wastewater treatment and reuse apparatus and method therefor |
| CN107226589A (en) * | 2017-07-19 | 2017-10-03 | 广东水道元环保科技有限公司 | Aerobic front end local oxygen enriching sewage-treatment plant based on Internet of Things |
| CN208776533U (en) * | 2018-08-21 | 2019-04-23 | 四川省环保科技工程有限责任公司 | For purifying the unpowered processing system of mountain area sanitary sewage |
| CN110028150A (en) * | 2019-04-28 | 2019-07-19 | 江苏省中国科学院植物研究所 | A kind of modularization coupling sewage disposal system |
| CN110482701A (en) * | 2019-08-29 | 2019-11-22 | 安徽建筑大学 | A kind of distribution water inlet multistage AO series connection high efficiency biological denitrification system and method |
| CN111732141A (en) * | 2020-08-04 | 2020-10-02 | 安徽马钢矿业资源集团南山矿业有限公司 | Unpowered purifier of circulating water |
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Application publication date: 20210205 |