CN101200340B - Sewage water treatment system - Google Patents
Sewage water treatment system Download PDFInfo
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- CN101200340B CN101200340B CN2006101576339A CN200610157633A CN101200340B CN 101200340 B CN101200340 B CN 101200340B CN 2006101576339 A CN2006101576339 A CN 2006101576339A CN 200610157633 A CN200610157633 A CN 200610157633A CN 101200340 B CN101200340 B CN 101200340B
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Abstract
The invention relates to a sewage treatment system, which comprises a grid for filtering suspended substances and impurities in the sewage, a sand sedimentation pond used to separate the sediment and inorganic granules in the sewage, a middle sedimentation pond and an absorption pond used to absorb the contaminations in the sewage; wherein the grid and the sand sedimentation pond are connected each other to perform the pretreatment of the sewage, the absorption pond and the middle sedimentation pond are connected each other to perform absorption sedimentation treatment of the contaminations in the sewage; the invention is characterized in that: the sewage treatment system also comprises an anoxic pond and an aerobic pond that are connected each other, the aerobic pond is added with biological fillings, entire system solves effectively the problem of inadequate carbon source when denitrifying in the original AB water treatment system, thereby enhancing the effect of removing total nitrogen, moreover the invention has convenient management, no needing frequent maintenance, no needing frequent process parameter adjustment according to sludge retaining time and sludge concentration.
Description
[technical field]
The present invention relates to a kind of Sewage treatment systems, particularly a kind of application HYBAS (hybrid biofilm-activated sludge) aerobic process carries out the water treatment system of upgrading to former urban sewage treatment system.
[background technology]
AB method sewage treatment process is the abbreviation of absorption-biological degradation (Adsorption-Biodegradation).Be that the guest of Aachen, Germany polytechnical university gram (Bohnke) professor starts in the mid-1970s for solving traditional two stage biological treatment system.The sewage treatment process that is used for production practice since the beginning of the eighties.
The adsorption biodegradation total system is divided into 3 sections of pretreatment section, absorption deposition section, biological degradation sections etc.Wherein the principle of pretreatment section removal pollution substance is holding back and sedimentation by physics.Absorption deposition section is made up of adsorption tank and intermediate sedimentation pond, and the biological degradation section is made up of aeration tank and secondary sedimentation basins, and each one-tenth system does not disturb mutually, and every section all has uniqueness separately, the microorganism of suitable this section water quality characteristic.Absorption deposition section hydraulic detention time is short, the sludge loading height, growth be the fast microbial population of rate of propagation, sludge yield height, and have certain absorption property.Absorption deposition section mainly relies on adsorption to finish to the removal of pollution substance.The biological degradation section is further removed the organism in the sewage on the basis of absorption deposition section, and its microorganism is close with traditional activated sludge process.
Yet in the existing adsorption biodegradation water treatment system, aerating system adopts micro-pore aeration or jet-flow aeration in biological degradation section aeration tank, and these apparatus expensive and work-ing life are low and be not easy to safeguard.
Propelling along with expanding economy and urbanization process, the quantity discharged of industrial sewage has had in the more than ten years significantly to be increased, urban population also sharply increases, make the sewage water yield and the water quality enter the municipal sewage plant that very big variation all take place, mainly show as sewage quantity and increase considerably raising with sewage water inlet pollutent index.If the secular overload operation of adsorption biodegradation water treatment system in the prior art, water quality are difficult to guarantee.Moreover, along with the development of industrial and agricultural production, the quantity discharged of pollution substances such as nitrogen phosphorus has also had bigger lifting, and being on the rise along with body eutrophication problems such as lake and reservoirs, the sewage drainage standard of sewage work has improved in China, and the discharging of nitrogen phosphorus has been had strict requirement.Though the adsorption biodegradation water treatment system has certain removal ability in the biological degradation section to ammonia nitrogen in the prior art, aspect total nitrogen and phosphorus, can not reach the requirement of existing sewage drainage standard.
[summary of the invention]
In order to solve when using traditional AB method Sewage treatment systems, the effluent quality of Sewage Plant is difficult to guarantee, the content of nitrogen and phosphorus is higher in the sewage after treatment, can not reach the requirement of existing sewage drainage standard, and apparatus expensive, work-ing life are low, the deficiency that is not easy to safeguard.The invention provides a kind of Sewage treatment systems.
The present invention solves the deficiencies in the prior art and the technical scheme that adopts is: a kind of Sewage treatment systems is provided, and described system comprises the grid that is used for filtering sewage suspended substance and impurity, the adsorption tank that is used for separating the settling pit and the intermediate sedimentation pond of sewage silt and inorganic particle and is used for adsorbing the sewage pollution substance; Wherein grid links to each other with settling pit and sewage is carried out pre-treatment, adsorption tank links to each other with the intermediate sedimentation pond pollutants in sewage matter is adsorbed depositing treatment; It is characterized in that: described Sewage treatment systems also comprises interconnective anoxic pond and Aerobic Pond, has dosed biologic packing material in described Aerobic Pond.
According to a preferred embodiment of the invention, the work that cooperatively interacts of described anoxic pond and described Aerobic Pond, the mud that refluxes in mixed solution that refluxes in the described Aerobic Pond and the secondary sedimentation basins is sent to the water intake end of described anoxic pond by reflux.
According to a preferred embodiment of the invention, described anoxic pond is equipped with whipping appts.
According to a preferred embodiment of the invention, the active sludge of described anoxic pond contains denitrifying bacterium.
According to a preferred embodiment of the invention, the biologic packing material of dosing in the described Aerobic Pond contains degradation bacteria and nitrifier.
According to a preferred embodiment of the invention, the packing density in the described Aerobic Pond approaches water.
According to a preferred embodiment of the invention, filler is plastics or resin material in the described Aerobic Pond.
According to a preferred embodiment of the invention, the filler in the described Aerobic Pond is provided with the biological bed of a plurality of suitable microorganisms absorption growths.
According to a preferred embodiment of the invention, be equipped with in the described Aerobic Pond and can reach even gas distribution and have very high oxygen transfer efficiency and can also promote simultaneously the filler motion, increase the power aerating apparatus that microbial film and sewage fully contact.
According to a preferred embodiment of the invention, described power aerating apparatus adopts gas blower to carry out work in conjunction with mesopore tubular type aerating apparatus.
The invention has the beneficial effects as follows: the Aerobic Pond mixed-liquor return to anoxic pond foremost, effectively solved in the former AB water treatment system in B section insufficient problem of carbon source during, thereby strengthened removal effect total nitrogen at denitrification; Adopt mesopore tubular type aerating system, compare micro-pore aeration and jet-flow aeration more economically, longer service life, simultaneously maintenance is still less, while is owing to Packed retardance and cut apart effect, has overcome the deficiency of mesopore tubular type aerating system aspect oxygen transfer efficiency in the past; Introduced bio membrane treatment in Aerobic Pond, biomembranous existence meeting creates aerobic and anoxic environment simultaneously in Aerobic Pond, therefore in Aerobic Pond the nitrification and denitrification effect can take place simultaneously, further strengthens the removal effect to total nitrogen; The whole system operational management is convenient, need not frequent maintenance, need not frequently according to mud age, sludge concentration etc. the technology operating parameter to be regulated.
[description of drawings]
Fig. 1, be a kind of Sewage treatment systems flowage structure figure that the present invention determines;
Fig. 2, be the Sewage treatment systems biological degradation section system architecture front view that the present invention determines;
Fig. 3, be the Sewage treatment systems biological degradation section system architecture vertical view that the present invention determines;
Fig. 4, be Aerobic Pond working state schematic representation in the Sewage treatment systems determined of the present invention;
Fig. 5, be biologic packing material structure iron in the Sewage treatment systems determined of the present invention.
[embodiment]
The present invention is further described below in conjunction with drawings and Examples.
A kind of Sewage treatment systems flowage structure figure that Fig. 1 determines for the present invention.As shown in FIG., this water treatment method is divided into 3 sections of pretreatment section, absorption deposition section, biological degradation sections etc.
Pretreatment section comprises grid 1 and settling pit 2.Sewage at first passes through grid 1, removes thick suspended substance and foreign material, enters settling pit 2 afterwards, by the physics settlement action, removes the inorganic particle that comprises in the sewage, and follow-up equipment is played a protective role.Certainly, can also adopt other mode tentatively to remove thick suspended substance and foreign material in the water, for example adopt and filter or pneumatically supported mode also can reach the effect of same removal impurity, realize protection postorder equipment in this pretreatment section.Afterwards, sewage enters the absorption deposition section of being made up of adsorption tank 3 and intermediate sedimentation pond 4, and is short at absorption deposition section hydraulic detention time, the sludge loading height, growth be the fast microbial population of rate of propagation.Select higher sludge loading and short mud age in adsorption tank 3, the adsorption by active sludge removes pollution substance.And, can effectively offset the influence of impact load in the water inlet by adsorption, guarantee the steady running of whole improvement adsorption biodegradation.After adsorption tank 3 water outlets, sewage enters intermediate sedimentation pond 4, and after the process mud-water separation, supernatant liquor goes out to flow to into the biological degradation section.
Adopt anoxic pond 5 and Aerobic Pond 6 combinations in the biological degradation section, replace the aeration tank in the former AB method water technology.Mix with the mud that the mixed solution that is refluxed by back segment Aerobic Pond 6, secondary sedimentation basins 7 reflux from the effusive sewage of absorption deposition section, be introduced into anoxic pond 5.Do not add filler in anoxic pond 5, sewage mixing, propulsive power rely on active sludge to finish the degraded of denitrification and part BOD from submersible agitator 13, and in active sludge, denitrifying bacterium occupies quite great proportion.
Adopt the submersible agitator 13 of banana type blade in the anoxic pond 6.Under evenly stirring, water body produces the streamflow regime that circles round, and makes that reaching uniform from the effusive sewage of absorption deposition section with the mud of the mixed solution that is refluxed by back segment Aerobic Pond 6, secondary sedimentation basins 7 backflows mixes.The installation site of agitator 13 and angle can be regulated in the anoxic pond 5, reach the ideal working order.
After the anoxic pond 5 is Aerobic Pond 6, in Aerobic Pond 6, adds biologic packing material 11.When in the Aerobic Pond 6 during aeration aerating, the rising buoyancy of air filled cavity promotes filler and water body on every side flows, and is blocked by filler 11 again when air-flow passes the space of current and filler, and is divided into small bubbles.In such process, filler is stirred fully and is mixed with current, and airflow is divided into tiny bubble fully, has increased contacting and oxygen transfer efficiency of microbial film and oxygen.And the removal of BOD (biochemical oxygen demand (BOD)) is mainly finished by active sludge intermixture, nitration denitrification phenomenon simultaneously may take place; Because active sludge does not need to bear nitrated task, therefore can be in the whole Aerobic Pond 6 by the control in age of weak point mud, enhanced biological phosphorus removal effect.
Discharging device requires to reach biologic packing material 11 is remained in the Aerobic Pond 6, and its pore size is decided by the physical dimension of biologic packing material 11.The shape of discharging device has the porous flat plate formula or twines welding tubular type (horizontal or vertical direction).Water-outlet area depends on that the unit in different apertures goes out stream load.Discharging device does not have moving parts, and is not easy to wear.
Consult the Sewage treatment systems biological degradation section system architecture front view that Fig. 2 the present invention determines, the Sewage treatment systems biological degradation section system architecture vertical view that Fig. 3 the present invention determines.The adsorption biodegradation of modified form replaces original aeration tank in the biological degradation section with five reaction tanks, wherein four of the front reaction tanks are anoxic pond 5, last is an Aerobic Pond 6, in the biological degradation section, the water outlet of medium sediment pool 4 and the mixed solution that refluxes from Aerobic Pond 6, the excess sludge that refluxes from second pond 7 mixes, at first enter four anoxic pond 5 of successive, in anoxic pond 5, installed and be used for the mechanical stirrer 13 of stirring active mud and mix to keep active sludge and sewage, in anoxic pond 5, contain a large amount of denitrifying bacteriums in the active sludge, anti-nitration reaction takes place in anoxic pond 5 in sewage, contained nitrite nitrogen and nitrate nitrogen is converted into nitrogen in the feasible mixed solution that refluxes, and also removes the BOD of part simultaneously.Sewage enters Aerobic Pond 6 afterwards, and under aerobic condition, the BOD in the sewage is mainly degraded by active sludge, and ammonia nitrogen then is converted into nitrite nitrogen and nitrate nitrogen by biomembranous nitrification accompanying on the biologic packing material 11.
Wherein, the ratio of single anoxic pond 5 and Aerobic Pond 6 hydraulic detention times is 0.43: 1, and the hydraulic detention time that anoxic pond 5 is total and the ratio of Aerobic Pond 6 hydraulic detention times are 1.72: 1.Aerobic mixed-liquor return ratio is 200%, and second pond 7 return sludge ratio rates are 100%.
Consult Aerobic Pond working state schematic representation in the Sewage treatment systems that Fig. 4 the present invention determines; Be added with the filler that contains degradation bacteria and nitrifier in Aerobic Pond 6, the power of Aerobic Pond 6 comes from the aeration of gas blower 8, and what aerating system adopted is mesopore tubular type aerating system 9.Filler 11 proportions approach water, are easy to the water free movement under the gentle agitation.It is big that biologic packing material 11 has effective surface area, is fit to the characteristics of microorganism absorption growth.When aeration aerating, because the retardation of filler 11, the air-flow that bottom aerating system 9 produces is split into small bubbles in uphill process, the rising buoyancy of air filled cavity promotes filler 11 and water body on every side flows, when air-flow passes the space of current and filler 11, blocked by filler again, and be divided into small bubbles.In such process, filler 11 is stirred fully and is mixed with current, and airflow is divided into tiny bubble fully, has increased contacting and oxygen transfer efficiency of microbial film and oxygen.Can also play simultaneously abundant promotion filler motion, reach microbial film and fully contact and biolytic purpose with processed pollutent.
Because the irregular movement of biologic packing material 11 in Aerobic Pond, stop constantly and the broken bubble that rises that the porous piping of small-bore during aerating system only need adopt and have like this, does not exist the blockage problem that often has in the micro-pore aeration and higher maintenance requirement.It is even that aerating system requires to reach gas distribution, and air demand is decided by design, and can control.
Consult biologic packing material structure iron in the Sewage treatment systems that Fig. 5 the present invention determines.As shown in the figure, filler 11 is provided with the biological bed 12 of a plurality of suitable microorganism absorption growths.At sewage of different nature and water outlet emission standard, throw in different biologic packing materials in the use, specific surface area circle of filler 11 is in 200-1200 square/cube, to be suitable for various processing requirements.When pre-treatment requires lowlyer, or when containing a large amount of fibrous matter in the sewage, adopt the less larger-size biologic packing material of specific surface area, such as in municipal wastewater is handled, not adopting preliminary sedimentation tank, perhaps, when processing contains the paper waste of a large amount of fibers.When existing pre-treatment preferably, or be used for when nitrated, adopt the big biologic packing material 11 of specific surface area.Biologic packing material 11 is made by plastics or resin.Proportion circle of filler is between 0.96-1.30.
It is as follows to use the testing data that a kind of water treatment system to AB sewage treatment process upgrading improves behind the former AB sewage treatment process:
Testing data one:
| Sequence number | Index | Water inlet | Former technology water outlet | The improved technology water outlet | Former technology clearance | The improved technology clearance |
| 1 | COD | 273 | 79.8 | 75.6 | 70.77％ | 72.31％ |
| 2 | BOD | 122 | 7.80 | 5.34 | 93.61％ | 95.62％ |
| 3 | Ammonia nitrogen | 37.1 | 21.6 | 4.99 | 41.78％ | 86.54％ |
| 4 | Total nitrogen | 50.7 | 38.6 | 31.8 | 23.87％ | 37.28％ |
| 5 | Total phosphorus | 18.4 | 11.5 | 10.4 | 37.50％ | 43.48％ |
Testing data two:
| Sequence number | Index | Water inlet | Former technology water outlet | The improved technology water outlet | Former technology clearance | The improved technology clearance |
| 1 | COD | 295 | 91.3 | 49.8 | 69.05％ | 83.12％ |
| 2 | BOD | 130 | 10.8 | 8.45 | 91.69％ | 93.50％ |
| 3 | Ammonia nitrogen | 33.6 | 34.6 | 19.9 | 0％ | 40.77％ |
| 4 | Total nitrogen | 47.6 | 40.8 | 21.2 | 14.29％ | 55.46％ |
| 5 | Total phosphorus | 12.8 | 9.69 | 5.87 | 24.30％ | 54.14％ |
Testing data three:
| Sequence number | Index | Water inlet | Former technology water outlet | The improved technology water outlet | Former technology clearance | The improved technology clearance |
| 1 | COD | 238 | 140 | 84.4 | 41.18％ | 64.54％ |
| 2 | BOD | 164 | 8.6 | 8.6 | 94.76％ | 94.76％ |
| 3 | Ammonia nitrogen | 30.6 | 19.1 | 9.38 | 37.58％ | 69.35％ |
| 4 | Total nitrogen | 42.5 | 35.8 | 24.1 | 15.76％ | 43.29％ |
| 5 | Total phosphorus | 24.1 | 15.2 | 9.66 | 36.93％ | 59.92％ |
Use the water treatment system of AB sewage treatment process upgrading as can be seen from above testing data, with respect to former AB Sewage treatment systems water is handled, can effectively remove the content of ammonia nitrogen, nitrogen and phosphorus in the sewage, COD in the water (chemical oxygen demand (COD)) and BOD (biochemical oxygen demand (BOD)) content are also had good removal power.
Above-mentioned detailed description only is exemplary description, and those skilled in the art can design various embodiments according to different actual needs under the situation of the scope and spirit that do not break away from the present invention and protected.
Claims (10)
1. Sewage treatment systems comprises the grid (1) that is used for filtering sewage suspended substance and impurity, the settling pit (2) that is used for separating sewage silt and inorganic particle and intermediate sedimentation pond (4) and is used for adsorbing the adsorption tank (3) of sewage pollution substance; Wherein grid (1) links to each other with settling pit (2) and sewage is carried out pre-treatment, adsorption tank (3) links to each other with intermediate sedimentation pond (4) pollutants in sewage matter is adsorbed depositing treatment; It is characterized in that: described Sewage treatment systems also comprises interconnective anoxic pond (5) and Aerobic Pond (6), in described Aerobic Pond (6), dosed biologic packing material (11), described Sewage treatment systems comprises the discharging device that links to each other with Aerobic Pond (6), discharging device requires to reach biologic packing material (11) is remained in the Aerobic Pond (6), and its pore size is decided by the physical dimension of biologic packing material (11).
2. Sewage treatment systems according to claim 1, it is characterized in that: the mud that refluxes in mixed solution that refluxes in the work that cooperatively interacts of described anoxic pond (5) and described Aerobic Pond (6), described Aerobic Pond (6) and the secondary sedimentation basins (7) is sent to the water intake end of described anoxic pond (5) by reflux (10).
3. Sewage treatment systems according to claim 1 is characterized in that: described anoxic pond (5) is equipped with whipping appts (13).
4. Sewage treatment systems according to claim 1 is characterized in that: the active sludge of described anoxic pond (5) contains denitrifying bacterium.
5. Sewage treatment systems according to claim 1 is characterized in that: the biologic packing material of dosing in the described Aerobic Pond (6) (11) contains degradation bacteria and nitrifier.
6. Sewage treatment systems according to claim 1 is characterized in that: filler (11) density in the described Aerobic Pond (6) approaches water.
7. Sewage treatment systems according to claim 6 is characterized in that: filler (11) is plastics or resin material in the described Aerobic Pond (6).
8. Sewage treatment systems according to claim 1 is characterized in that: the filler in the described Aerobic Pond (11) is provided with the biological bed (12) of a plurality of suitable microorganism absorption growths.
9. Sewage treatment systems according to claim 1 is characterized in that: described Aerobic Pond (6) is equipped with the power aerating apparatus.
10. Sewage treatment systems according to claim 9 is characterized in that: described power aerating apparatus adopts gas blower (8) to carry out work in conjunction with mesopore tubular type aerating apparatus (9).
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| CN2006101576339A CN101200340B (en) | 2006-12-15 | 2006-12-15 | Sewage water treatment system |
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| CN101200340B true CN101200340B (en) | 2011-07-06 |
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| CN103991958B (en) * | 2014-05-27 | 2015-07-15 | 青岛思普润水处理股份有限公司 | Method for upgrading and expanding sequencing batch biological pool by utilizing moving bed biofilm process |
| CN113998834A (en) * | 2021-09-29 | 2022-02-01 | 中国电建集团华东勘测设计研究院有限公司 | Urban sewage comprehensive treatment and efficient recycling system |
| CN114671515B (en) * | 2022-04-26 | 2023-09-26 | 国网河北省电力有限公司电力科学研究院 | Floating filler for aerobic tank and preparation method and application thereof |
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Non-Patent Citations (2)
| Title |
|---|
| 化学工业出版社组织编写.水处理工程典型设计实例 1.化学工业出版社,2001,257. |
| 化学工业出版社组织编写.水处理工程典型设计实例 1.化学工业出版社,2001,257. * |
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Owner name: CHINA EVERBRIGHT ENVIRONMENTAL PROTECTION CO., LTD Free format text: FORMER NAME: SHENZHEN EVERBRIGHT ENVIRONMENTAL PROTECTION ENGINEERING TECHNOLOGY CO., LTD. |
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