CN209906463U - Sewage advanced nitrogen and phosphorus removal integrated tank - Google Patents
Sewage advanced nitrogen and phosphorus removal integrated tank Download PDFInfo
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- CN209906463U CN209906463U CN201920577234.0U CN201920577234U CN209906463U CN 209906463 U CN209906463 U CN 209906463U CN 201920577234 U CN201920577234 U CN 201920577234U CN 209906463 U CN209906463 U CN 209906463U
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Abstract
The utility model relates to a sewage deep denitrification and dephosphorization integrated pool, which belongs to the field of sewage treatment and comprises an anaerobic zone, a sludge membrane front anoxic zone, a sludge membrane aerobic zone, a micro aerobic zone, a sludge membrane rear anoxic zone, a sludge membrane supplemental oxygen zone, a sedimentation zone and a filtering and disinfection zone, wherein the anaerobic zone is communicated with the sludge membrane front anoxic zone through a square water through hole at the upper part of the outer side end of a middle partition wall; the front anoxic zone of the mud film is communicated with the aerobic zone of the mud film through a lower square water through hole in the middle of the partition wall; the mud film aerobic zone is communicated with the micro aerobic zone through a square water through hole at the upper part of the middle position of the partition wall; the micro aerobic zone is communicated with the anoxic zone behind the mud film through a water through hole which is arranged at the lower part of the outer side end of the partition wall. The utility model discloses can ensure that total nitrogen of water and total phosphorus reach the higher standard of national standard.
Description
Technical Field
The utility model relates to a sewage degree of depth nitrogen and phosphorus removal integration pond belongs to the sewage treatment field.
Background
The current GB18918-2002 discharge standard of pollutants for municipal wastewater treatment plants in China sets a third-level standard for the effluent quality of municipal wastewater treatment plants, wherein the first-level standard is divided into A standard and B standard. Because the discharge standard is too low, the water which is treated by the sewage treatment plant and reaches the first-grade A or first-grade B standard is far from reaching the fourth or fourth standard of the surface class, and the effluent water reaches the higher standard, the process of deep nitrogen and phosphorus removal needs to be discussed on the basis of the existing process.
At present, although the A/O process has good denitrification and dephosphorization effects, the denitrification efficiency is difficult to further improve; in addition, some researchers and companies propose a sewage treatment mode combining the a/O and the MBR (a/O-MBR process), and although the effluent quality effect can be greatly improved, the TN of the effluent quality of the process is difficult to improve from the national first-level a standard to the national standard surface IV water standard.
The moving bed biofilm process applies the basic principle of a biofilm process, adopts suspended biological carriers, has large effective surface area per unit volume, is suitable for being combined with the conventional denitrification and dephosphorization A/O process, and achieves deep denitrification and dephosphorization so that the effluent of a sewage treatment facility reaches a higher standard.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defect that the total nitrogen and total phosphorus of the effluent of the existing A/O process cannot reach higher standards in the national standard, and solve the problems that the operation management of the existing A/O-MBR process is complicated and the operation cost is high, the utility model provides an integrated pond for deep nitrogen and phosphorus removal of sewage.
The technical solution of the utility model is that:
a sewage deep nitrogen and phosphorus removal integrated pool comprises an anaerobic zone, a sludge membrane front anoxic zone, a sludge membrane aerobic zone, a micro aerobic zone, a sludge membrane rear anoxic zone, a sludge membrane supplemental oxygen zone, a sedimentation zone and a filtering and disinfecting zone, wherein the anaerobic zone is communicated with the sludge membrane front anoxic zone through a water through hole in the upper square part of the outer side end of a partition wall, and the anaerobic zone is provided with a stirrer; the anoxic zone in front of the mud film is communicated with the aerobic zone of the mud film through a lower square water through hole in the middle of the partition wall, the anoxic zone in front of the mud film is provided with a stirrer, a suspension carrier is added into the anoxic zone, and a water outlet screen is arranged in front of the lower square water through hole; the aerobic sludge film area is communicated with the micro aerobic sludge film area through a square water through hole at the upper part of the middle position of the partition wall, the bottom of the aerobic sludge film area is provided with an aerator, a suspension carrier is added into the aerator, and a water outlet screen is arranged in front of the square water through hole at the upper part; the micro aerobic zone is communicated with the anoxic zone behind the mud film through a square water through hole at the lower part of the outer side end of the partition wall, and the bottom of the micro aerobic zone is provided with an aerator; the anoxic zone behind the mud film is communicated with the square water passing hole at the upper part of the position of the outer side end of the partition wall between the oxygen supplementing zones of the mud film, the anoxic zone behind the mud film is provided with a stirrer, a suspension carrier is added into the anoxic zone, and a water outlet screen is arranged in front of the square water passing hole at the lower part of the anoxic zone; the sludge film oxygen supplementing area is communicated with the settling area through upper water passing holes at the outer side end position of the partition wall, the bottom of the sludge film oxygen supplementing area is provided with an aerator, a suspension carrier is added into the aerator, and a water outlet screen is arranged in front of the upper water passing holes; the sedimentation area is communicated with the filtering and disinfecting area through the upper water through hole at the outer side end of the partition wall.
As one of the preferable schemes of the present invention, the anaerobic zone is provided with an anaerobic zone water inlet pipe through which part of the water inflow from the main water inlet pipe passes.
As one of the preferable proposal of the utility model, the anaerobic zone is provided with a return sludge outlet which is lifted by a return sludge pump.
As one of the preferable proposal of the utility model, the anoxic zone is provided with an anoxic zone inlet pipe through which part of the water inflow from the main inlet pipe passes before the mud film.
As one of the preferable proposal of the utility model, the anoxic zone behind the sludge membrane is provided with a carbon source feeding pipe which is used for removing total nitrogen and needs to supplement an external carbon source.
As one of the preferred scheme of the utility model, the play water department in anoxic zone is provided with the flocculating agent that is used for flocculating chemical dephosphorization to need throw to throw the flocculating agent and throws the feeder tube behind the sludge membrane.
As one of the preferable proposal of the utility model, the settling zone is connected with a return sludge pump.
The utility model discloses following technological beneficial effect has:
1) the utility model provides a sewage degree of depth nitrogen and phosphorus removal integration pond, it has adopted anaerobic zone, the mixed biochemical reaction mode of activated sludge-biomembrane that anoxic zone and anoxic zone combined together behind the mud membrane before the mud membrane, can ensure that total nitrogen of effluent and total phosphorus reach the higher standard of national standard.
2) The utility model discloses pass through the anaerobic zone inlet tube with total inflow, the anoxic zone inlet tube gets into anaerobic zone and sludge blanket preceding anoxic zone respectively, partial intake at the anaerobic zone at first with promote the muddy water mixture of coming through the backward flow sludge pump, carry out the anaerobism and release phosphorus, and consume the organic matter of part biodegradable in the intake, and another part is intake and is mixed the reaction with the muddy water that comes from the anaerobic zone in the anoxic zone before the sludge blanket, on the suspension carrier with under the effect of facultative anaerobe in the suspension activated sludge, most total nitrogen is got rid of in the denitrification and the organic matter of part biodegradable in the consumption intake.
3) Muddy water from the anoxic zone in front of the sludge membrane enters the aerobic zone of the sludge membrane, and can be subjected to more thorough nitrification reaction to remove ammonia nitrogen by providing a sufficiently high dissolved oxygen concentration on the suspension carrier and under the action of aerobic bacteria in the suspended activated sludge.
4) For keeping out water total nitrogen safety and stability up to standard, the utility model discloses a little aerobic zone has been hugged closely at the back in mud film aerobic zone, only there are activated sludge microorganisms in little aerobic zone, it can further biochemical ammonia nitrogen that does not get rid of in the muddy water in the preceding process area under lower dissolved oxygen aeration condition, dissolved oxygen concentration in the reflux liquid keeps lower level in can guaranteeing again to wear in-wall backwash pump to promote the nitronate in the oxygen deficiency district before the mud film, in order to do benefit to the denitrification of oxygen deficiency district before the mud film and get rid of total nitrogen, on the other hand also can guarantee to get into the dissolved oxygen concentration in the muddy water in oxygen deficiency district behind the mud film lower and do benefit to the more thoroughly postposition denitrification in the oxygen deficiency district behind the mud film and get rid of total nitrogen, the quantity of the extra carbon source of saving possibility.
5) The function of the sludge film oxygen supplementing zone is that on one hand, the external carbon source which is possibly added in excess in the anoxic zone behind the sludge film can be further biochemically and aerobically removed, and on the other hand, the dissolved oxygen in the effluent can also be kept at a certain concentration value.
6) Because the utility model discloses an anoxic zone and mud membrane supply oxygen district behind anoxic zone, the aerobic zone of mud membrane, the mud membrane all added the suspension carrier before the mud membrane, the suspension carrier has strengthened the anti load impact ability of system greatly, also makes the system can guarantee more steadily to the effect of getting rid of total nitrogen and total phosphorus, also more does benefit to processing system's miniaturized design.
Drawings
Fig. 1 is a schematic plan view of the present invention.
Wherein: 1. an anaerobic zone, 2, an anoxic zone in front of a sludge membrane, 3, a sludge membrane aerobic zone, 4, a micro aerobic zone, 5, an anoxic zone behind the sludge membrane, 6, a sludge membrane oxygen supplementing zone, 7, a settling zone, 8, a filtering and disinfecting zone, 9, a main water inlet pipe, 10, an anaerobic zone water inlet pipe, 11, an anoxic zone water inlet pipe, 12, a stirrer, 13, a suspension carrier, 14, a through-wall internal reflux pump, 15, a water outlet screen, 16, an aerator, 17, a carbon source adding pipe, 18, a flocculating agent adding pipe, 19, a reflux sludge pump, 20 and a reflux sludge outlet.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1.
A sewage deep denitrification and dephosphorization integrated pool comprises an anaerobic zone 1, a sludge membrane front anoxic zone 2, a sludge membrane aerobic zone 3, a micro aerobic zone 4, a sludge membrane rear anoxic zone 5, a sludge membrane supplemental oxygen zone 6, a settling zone 7 and a filtering and disinfecting zone 8, wherein the anaerobic zone 1 is communicated with the sludge membrane front anoxic zone 2 through a water through hole formed in the upper part of the outer side end of a partition wall between the anaerobic zone 1 and the sludge membrane front anoxic zone 2, and the anaerobic zone 1 is provided with a stirrer 12; the anoxic zone 2 in front of the mud film is communicated with the aerobic zone 3 of the mud film through a lower square water through hole in the middle of the partition wall, the anoxic zone 2 in front of the mud film is provided with a stirrer 12, a suspension carrier 13 is added into the anoxic zone, and a water outlet screen 15 is arranged in front of the lower square water through hole; the mud film aerobic zone 3 is communicated with the micro aerobic zone 4 through a square water through hole at the upper part of the middle position of the partition wall between the aerobic zones, the bottom of the mud film aerobic zone 3 is provided with an aerator 16, a suspension carrier 13 is added into the aerator, and a water outlet screen 15 is arranged in front of the square water through hole at the upper part; the micro aerobic zone 4 is communicated with the anoxic zone 5 after the mud film through a water through hole at the lower part of the outer side end of the partition wall, and the bottom of the micro aerobic zone 4 is provided with an aerator 16; the anoxic zone 5 behind the mud film is communicated with the square water passing hole at the upper part of the position of the outer side end of the partition wall between the oxygen supplementing zone 6 of the mud film, the anoxic zone 5 behind the mud film is provided with a stirrer 12, a suspension carrier 13 is added into the anoxic zone, and a water outlet screen 15 is arranged in front of the square water passing hole at the lower part; the sludge membrane oxygen supplementing zone 6 is communicated with the settling zone 7 through upper water passing holes at the outer side end position of the partition wall, the bottom of the sludge membrane oxygen supplementing zone 6 is provided with an aerator 16, a suspended carrier 13 is added into the aerator, and a water outlet screen 15 is arranged in front of the upper water passing holes; the sedimentation zone 7 is communicated with the filtering and disinfecting zone 8 through an upper water through hole at the outer side end of the partition wall.
The anaerobic zone 1 is provided with an anaerobic zone inlet pipe 10 through which part of the water inflow from the mains inlet pipe 9 passes.
The anaerobic zone 1 is provided with a return sludge outlet 20 which is raised by a return sludge pump 19.
The anoxic zone 2 in front of the sludge membrane is provided with an anoxic zone water inlet pipe 11 through which part of water inflow from the main water inlet pipe 9 passes.
The anoxic zone 5 behind the sludge membrane is provided with a carbon source adding pipe 17 which is used for removing total nitrogen and needs to supplement an external carbon source.
And a flocculating agent adding pipe 18 which is used for flocculating chemical phosphorus removal and needs to be added with flocculating agent is arranged at the water outlet of the anoxic zone 5 behind the sludge membrane.
The settling zone 7 is connected to a return sludge pump 19.
The utility model discloses a work flow does:
1) the total water inflow enters an anaerobic zone and an anoxic zone in front of a sludge membrane through an anaerobic zone water inlet pipe and an anoxic zone water inlet pipe respectively, part of the inflow water is firstly mixed with mud water lifted by a reflux sludge pump in the anaerobic zone to carry out anaerobic phosphorus release, and part of biodegradable organic matters in the inflow water are consumed; the other part of the inlet water is subjected to mixed biochemical reaction with the sludge water from the anaerobic zone in the anoxic zone in front of the sludge membrane, and the denitrification removes most of total nitrogen and consumes most of biodegradable organic matters in the inlet water under the action of microorganisms in the suspended carrier and the suspended activated sludge.
2) Muddy water subjected to denitrification in the anoxic zone in front of the sludge membrane and removing total nitrogen flows into the sludge membrane aerobic zone through the water outlet screen, and is subjected to biochemical nitrification reaction by dissolved oxygen provided by the aerator arranged at the bottom under the action of aerobic bacteria on the suspension carrier and in the suspension activated sludge to remove ammonia nitrogen.
3) The sludge water after the nitration reaction in the sludge film aerobic zone passes through the water outlet screen and flows into the micro aerobic zone, only active sludge exists in the micro aerobic zone, and the residual ammonia nitrogen is further removed biochemically under the condition of low dissolved oxygen aeration; meanwhile, most of the nitrified liquid muddy water with low dissolved oxygen is lifted to the anoxic zone in front of the sludge membrane through the through-wall internal reflux pump, and the other part of the muddy water with low dissolved oxygen flows into the anoxic zone behind the sludge membrane through the water passing hole.
4) In the anoxic zone behind the sludge membrane, the residual total nitrogen is further removed by denitrification by adding an additional carbon source required by denitrification.
5) The microorganism in the sludge film oxygen supplementing zone can further aerobically and biochemically remove the external carbon source which is possibly added in the anoxic zone behind the sludge film, and can also keep the concentration value of the dissolved oxygen in the effluent.
6) And sludge water obtained after the flocculant is added through a flocculant adding pipe in the sludge film oxygen supplementing area flows into a settling area, sludge-water separation is carried out in the settling area, the bottom settled sludge part is lifted by a return sludge pump and flows into an anaerobic area through a return sludge outlet, and clear water at the upper part of the settling area flows into a filtering and disinfecting area for further advanced treatment.
Example one.
According to a sewage treatment plant in a certain rural town of Hunan province, the designed water amount of inflow is 2500 m/day, the COD concentration of inflow is 400mg/L, BOD concentration is 150mg/L, the ammonia nitrogen concentration is 35mg/L, TN concentration is 45mg/L, TP concentration is 6mg/L, the quality of the outflow water meets the four types of national standard standards, namely the TN is less than or equal to 10mg/L, and other indexes meet the four types of ground surface standards. Use the utility model discloses integration pond technology, the cylinder type suspension carrier characteristics that add do: the material is HDPE, the specific gravity is 0.95g/cm3, the diameter is 25mm, the height is 10mm, the porosity is larger than or equal to 90%, the stacking density is larger than or equal to 98kg/m for cultivating, and the effective specific surface area is larger than or equal to 500 square meters/m for cultivating; a cylindrical water outlet screen is adopted to ensure that the suspended carriers are not accumulated on the water passing section of the suspended carriers; the HRT of the anaerobic zone of the engineering is 1.2 h, the HRT of the anoxic zone in front of the sludge membrane is 2h, the HRT of the aerobic zone of the sludge membrane is 2.5h, the HRT of the microaerobic zone is 0.45h, the HRT of the anoxic zone in back of the sludge membrane is 1h, the HRT of the oxygen supplementing zone of the sludge membrane is 0.5h, the BOD of the effluent is less than or equal to 5mg/L, the COD of the effluent is less than or equal to 30mg/L, the ammonia nitrogen is less than or equal to 1mg/L, and the TN is less than or equal to 10mg/L after the trial operation.
It is to be understood that any equivalents, or obvious variations, which may be made by those skilled in the art in light of the teachings herein, are deemed to be within the scope of the present invention.
Claims (1)
1. The integrated pond for deep nitrogen and phosphorus removal of sewage is characterized by comprising an anaerobic zone, an anoxic zone in front of a mud film, an aerobic zone of the mud film, a micro aerobic zone, an anoxic zone behind the mud film, an oxygen supplementing zone of the mud film, a settling zone and a filtering and disinfecting zone, wherein the anaerobic zone is communicated with the anoxic zone in front of the mud film through a square water through hole at the upper part of the outer side end of a partition wall between the anaerobic zone and the anoxic zone, and the anaerobic zone is provided with a stirrer; the anoxic zone in front of the mud film is communicated with the aerobic zone of the mud film through a lower square water through hole in the middle of the partition wall, the anoxic zone in front of the mud film is provided with a stirrer, a suspension carrier is added into the anoxic zone, and a water outlet screen is arranged in front of the lower square water through hole; the aerobic sludge film area is communicated with the micro aerobic sludge film area through a square water through hole at the upper part of the middle position of the partition wall, the bottom of the aerobic sludge film area is provided with an aerator, a suspension carrier is added into the aerator, and a water outlet screen is arranged in front of the square water through hole at the upper part; the micro aerobic zone is communicated with the anoxic zone behind the mud film through a square water through hole at the lower part of the outer side end of the partition wall, and the bottom of the micro aerobic zone is provided with an aerator; the anoxic zone behind the mud film is communicated with the square water passing hole at the upper part of the position of the outer side end of the partition wall between the oxygen supplementing zones of the mud film, the anoxic zone behind the mud film is provided with a stirrer, a suspension carrier is added into the anoxic zone, and a water outlet screen is arranged in front of the square water passing hole at the lower part of the anoxic zone; the sludge film oxygen supplementing area is communicated with the settling area through upper water passing holes at the outer side end position of the partition wall, the bottom of the sludge film oxygen supplementing area is provided with an aerator, a suspension carrier is added into the aerator, and a water outlet screen is arranged in front of the upper water passing holes; the sedimentation area is communicated with the filtering and disinfecting area through the upper water through hole at the outer side end of the partition wall.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920577234.0U CN209906463U (en) | 2019-04-25 | 2019-04-25 | Sewage advanced nitrogen and phosphorus removal integrated tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920577234.0U CN209906463U (en) | 2019-04-25 | 2019-04-25 | Sewage advanced nitrogen and phosphorus removal integrated tank |
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| CN209906463U true CN209906463U (en) | 2020-01-07 |
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| CN201920577234.0U Active CN209906463U (en) | 2019-04-25 | 2019-04-25 | Sewage advanced nitrogen and phosphorus removal integrated tank |
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