CN111675424A - Sewage treatment process with MBBR - Google Patents
Sewage treatment process with MBBR Download PDFInfo
- Publication number
- CN111675424A CN111675424A CN202010433883.0A CN202010433883A CN111675424A CN 111675424 A CN111675424 A CN 111675424A CN 202010433883 A CN202010433883 A CN 202010433883A CN 111675424 A CN111675424 A CN 111675424A
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- Prior art keywords
- mbbr
- tank
- air
- sewage
- filter screen
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- 239000010865 sewage Substances 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000008569 process Effects 0.000 title claims abstract description 24
- AHEWZZJEDQVLOP-UHFFFAOYSA-N monobromobimane Chemical compound BrCC1=C(C)C(=O)N2N1C(C)=C(C)C2=O AHEWZZJEDQVLOP-UHFFFAOYSA-N 0.000 title claims abstract 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 74
- 238000005273 aeration Methods 0.000 claims abstract description 35
- 239000008394 flocculating agent Substances 0.000 claims abstract description 12
- 239000012535 impurity Substances 0.000 claims abstract description 12
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 239000010802 sludge Substances 0.000 claims description 15
- 239000000945 filler Substances 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000013329 compounding Methods 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims 1
- 235000012239 silicon dioxide Nutrition 0.000 claims 1
- 238000004065 wastewater treatment Methods 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 19
- 229910052760 oxygen Inorganic materials 0.000 abstract description 19
- 239000001301 oxygen Substances 0.000 abstract description 19
- 206010021143 Hypoxia Diseases 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 5
- 244000005700 microbiome Species 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 125000001477 organic nitrogen group Chemical group 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
-
- 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
- C02F3/308—Biological phosphorus removal
Abstract
A sewage treatment process with MBBR comprises the following steps: sewage passes through the filter screen that the water inlet flowed into the distribution tank top, flow to the distribution tank in after filtering, send sewage into oxygen deficiency MBBR pond through first pipeline through the first water pump of distribution tank bottom, carry out the oxygen deficiency and handle, flow into good oxygen MBBR pond again, and the aeration, send sewage after the aeration into flocculating agent case and flow into the setting tank, the clear water layer on upper strata conveys in the clear water pond, just can carry out first step filtration to impurity in the distribution tank, and filter fully, also can effectively get rid of impurity simultaneously, in good oxygen MBBR pond, through self pivoted aeration dish, can let the abundant mixture of air, can effectively separate clear water and silt again at the setting tank, and finally filter out clean clear water, sewage treatment efficiency is improved.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a sewage treatment process with MBBR.
Background
The urban domestic sewage is mainly discharged water produced by various kitchen water, washing water and toilet water used in human life, is mainly nontoxic inorganic salts, contains a large amount of suspended solid, chemically or biologically degradable soluble or colloidal dispersed organic matters, nitrogen-containing compounds, phosphate, potassium, sodium, heavy metal ions, bacteria and biological groups and the like. In recent years, organic nitrogen and ammonia nitrogen in water consume dissolved oxygen in water, so that the water body is blackened and smelled; excessive nitrogen and phosphorus in the water body can cause eutrophication of the water body and worsen the water environment.
In the prior art, for example, the publication number "CN 110642378A" is named as "an oxygen-enriched MBBR sewage treatment system and sewage treatment method", which discloses that "the oxygen-enriched MBBR sewage treatment system and sewage treatment method comprises a water inlet system, a main reaction tank, an oxygen-enriched MBBR tank, an aeration system, a water outlet interception system and a secondary sedimentation tank; the water inlet system comprises a water inlet tank, the water inlet tank is connected to a main reaction tank through a water inlet pipe through a water inlet pump, an inner ring and an outer ring structure are formed inside the main reaction tank, the main reaction tank is divided into an anoxic MBBR tank positioned at an inner ring and an anaerobic tank positioned at an outer ring, a water outlet pipe of the anaerobic tank is connected to the anoxic MBBR tank positioned at the inner ring of the main reaction tank through a pipeline, a water outlet pipe of the anoxic MBBR tank is connected to the oxygen-enriched MBBR tank through a pipeline, the oxygen-enriched MBBR tank is filled with suspended fillers, the bottom in the oxygen-enriched MBBR tank is connected with an aeration system, an aeration disc is provided with an aeration head, and the water outlet; this sewage treatment system's oxygen deficiency MBBR pond is provided with agitating unit, can make mud and sewage fully contact the mixture, avoids the layering of feed liquid in the pond to improve the anaerobism efficiency of nitrifying ".
However, the treatment method only enhances the mixing effect of the anoxic MBBR tank, does not enhance the whole sewage treatment, and does not effectively remove impurities in the water in the finally treated clean water.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a sewage treatment process with MBBR, which can effectively and fully remove sewage inflow.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: the invention relates to a sewage treatment process with MBBR, which comprises the following steps:
step 1, sewage flows into a filter screen above a water distribution tank through a water inlet, and flows into the water distribution tank after being filtered.
And 2, sending the sewage into an anoxic MBBR tank through a first pipeline through a first water pump at the bottom of the distribution tank, wherein an anoxic filler is arranged in the anoxic MBBR tank for anoxic treatment.
Step 3, sewage after the oxygen deficiency treatment flows into the good oxygen MBBR pond through the second hole, be provided with good oxygen filler in the good oxygen MBBR pond, still be provided with aeration dish, air duct pipe and air-blower on the good oxygen MBBR pond, the air-blower setting is in the top in good oxygen MBBR pond, the air-blower is connected to the one end of air duct pipe, and the aeration dish is connected to the other end of air duct pipe, the week side of aeration dish is provided with the air outlet, and the air-blower starts to pass into aeration dish and follow the air outlet discharge with wind through the air duct pipe, carry out the aeration to good oxygen MBBR pond.
And 4, extending an input pipe of the second water pump into the aerobic MBBR tank, conveying the aerated sewage into a flocculating agent box, adding a flocculating agent into a flocculating agent pipe at the top of the flocculating agent box, and flowing into the settling tank from a flocculating agent outlet pipe.
And 5, precipitating the sewage by using a precipitation tank, wherein the treated sewage has an upper layer and a lower layer, a third water pump transmits the upper clear water layer into a clear water tank, and a clear water pipe is arranged at the bottom of the clear water tank and discharges clear water.
In order to effectively remove the sludge in the settling tank, the invention has the improvement that the invention also comprises a step 6, a sludge outlet is arranged at the bottom of the settling tank, a dredging cylinder is arranged at one side of the settling tank, the top of a piston rod of the dredging cylinder extends into the settling tank and is connected with a dredging plate, the dredging cylinder is started, and the piston rod moves to drive the dredging plate to discharge the sludge from the sludge outlet.
In order to further facilitate the removal of the sludge, the invention improves that the sludge removing plate is an inclined plane, and the bottom end of the inclined plane is close to the bottom of the settling tank.
In order to make the filter screen vibrate in a reciprocating manner, the invention improves that a support frame is arranged above the distribution pool, a first motor is arranged on the support frame, a cam is arranged on a driving shaft of the first motor, a first hole is arranged on the support frame, a vibration column is arranged on the first hole, a driving plate is arranged at the top end of the vibration column, a rotating wheel is arranged at the bottom end of the vibration column and penetrates through the first hole, a connecting frame is arranged at two sides of the inner wall of the distribution pool, a first spring is arranged on the connecting frame, one end of the first spring is fixed on the filter screen, the other end of the first spring is fixed on the connecting frame, a second spring is sleeved on the vibration column, one end of the second spring is fixed on the driving plate, the other end of the second spring is arranged on the support frame, and when the first motor is electrified and rotated, the cam is, the cam pushes the vibration column to reciprocate through the second spring while rotating, the filter screen is applied with force while moving, and the filter screen also longitudinally reciprocates on the distribution tank under the action of the first spring.
In order to effectively remove impurities on the filter screen, the invention is improved in that the filter screen is obliquely arranged, the two connecting frames are different in height, the distribution tank is provided with an opening at the lower side of the filter screen, a cleaning door is arranged on the opening, and when the cleaning door is opened, the impurities can be removed from the opening.
In order to fully perform aeration, the invention is improved in that an air passing cavity is arranged in the aeration disc, a baffle plate is arranged at the bottom end of the air duct pipe, an air inlet is formed in the middle of the aeration disc, the air inlet is connected with the air passing cavity, the air duct pipe extends into the air inlet, the baffle plate is clamped on the inner side of the air passing cavity, the air outlet is obliquely arranged, and when air is blown into the air passing cavity, the oblique air outlet drives the aeration disc to rotate.
In order to increase the effect of the flocculating agent, the flocculating agent is improved by respectively compounding 60% diatom, a polysilicic acid solution and 45% polyferric oxide according to the mass ratio of 50-60:20-30: 10-20.
(III) advantageous effects
Compared with the prior art, the invention provides a sewage treatment process with MBBR, which has the following beneficial effects:
this take MBBR's sewage treatment process accomplishes better filter effect on every process, just can carry out the first step filtration to impurity in the distribution tank to filter abundant, also can effectively get rid of impurity simultaneously, in good oxygen MBBR pond, through self pivoted aeration dish, can let the abundant mixture of air, can effectively separate clear water and silt again in the sedimentation tank, and finally filter out clean clear water, improved sewage treatment efficiency.
Drawings
FIG. 1 is a schematic structural diagram of a sewage treatment process with MBBR according to the present invention;
FIG. 2 is a structural diagram of a distribution tank of the sewage treatment process with MBBR of the invention;
FIG. 3 is a partial enlarged view of a sewage treatment process with MBBR according to the present invention;
FIG. 4 is a structural diagram of the second half of the sewage treatment process with MBBR of the present invention;
FIG. 5 is a structural diagram of an aeration disc and an air duct pipe of the sewage treatment process with MBBR of the invention.
In the figure: 1. a water inlet; 2. a water distribution tank; 3. a filter screen; 4. a support frame; 5. a first motor; 6. A cam; 7. vibrating the column; 8. a drive plate; 9. a rotating wheel; 10. a connecting frame; 11. a first spring; 12. A second spring; 13. an opening; 14. cleaning the door; 15. a first water pump; 16. a first conduit; 17. an anoxic MBBR pool; 18. a second hole; 19. an aerobic MBBR tank; 20. an aeration disc; 21. an air duct pipe; 22. A blower; 23. an air outlet; 24. a ventilation cavity; 25. a stop plate; 26. a second water pump; 27. a flocculant box; 28. a flocculant pipe; 29. a settling tank; 30. a third water pump; 31. a clean water tank; 32. a clear water pipe; 33. a sludge outlet; 34. a dredging cylinder; 35. a dredging plate; 36. an inclined surface; 37. and (4) filtering the screen mesh.
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.
Referring to fig. 1-5, the sewage treatment process with MBBR of the present invention comprises the following steps:
step 1, sewage flows into a filter screen 3 above a distribution pool 2 through a water inlet 1, and flows into the distribution pool 2 after being filtered.
Further, the top of distribution tank 2 is provided with support frame 4, be provided with first motor 5 on support frame 4, be provided with cam 6 in the drive shaft of first motor 5, be provided with first hole on support frame 4, be provided with vibrations post 7 on the first hole, the top of vibrations post 7 is provided with drive plate 8, first hole is passed to the bottom of vibrations post 7, and the bottom is provided with running wheel 9, the inner wall both sides of distribution tank 2 are provided with link 10, be provided with first spring 11 on link 10, the one end of first spring 11 is fixed on filter screen 3, and the other end of first spring 11 is fixed on link 10, second spring 12 has been cup jointed on vibrations post 7, and the one end of second spring 12 is fixed on drive plate 8, and the other end setting of second spring 12 is on support frame 4.
When 5 circular telegrams of first motor rotate, drive cam 6 and rotate, promote vibrations post 7 in the time of cam 6 pivoted, vibrations post 7 passes through second spring 12 reciprocating motion, and in the removal, to filter screen 3 application of force, filter screen 3 also longitudinal reciprocating motion on distribution tank 2 under the effect of first spring 11, further promotion the filter effect of sewage through vibrations, also prevent simultaneously that great impurity card in the sewage from crossing filter screen 3, simultaneously because first motor 5 is kept apart with sewage, the effectual first motor 5 of sewage corrosion that has prevented.
Further, the filter screen 3 is obliquely arranged, the two connecting frames 10 have different heights, the flow of sewage cannot be influenced due to the oblique arrangement, the sewage still passes through the filter screen 3 and is finally deposited in the distribution tank 2, however, when the sewage vibrates, large impurities remained on the sewage filter screen 3 move towards the lower part along the filter screen 3, an opening 13 is formed in the lower side of the filter screen 3 of the distribution tank 2, a cleaning door 14 is arranged on the opening 13, and when the cleaning door 14 is opened, the impurities are removed from the opening 13 to prevent the impurities from remaining.
And 2, sending the sewage into an anoxic MBBR pool 17 through a first pipeline 16 by a first water pump 15 at the bottom of the distribution pool 2, wherein anoxic fillers are arranged in the anoxic MBBR pool 17 for anoxic treatment.
Firstly, the MBBR (moving bed biofilm reactor) is a carrier fluidized bed moving bed biofilm reactor, and the principle is that a certain amount of suspension carriers are added into the reactor to improve the biomass and the biological species in the reactor, so that the treatment efficiency of the reactor is improved. The density of the filler is close to that of water, so that the filler and the water are in a completely mixed state during aeration, in addition, the inside and the outside of each carrier are provided with different biological species, anaerobic bacteria or facultative bacteria grow inside the carriers, and the environment for the growth of microorganisms is three phases of gas, liquid and solid. The carrier is in the collision and the shearing action of aquatic, makes the air bubble littleer, has increased the outside for good fungus of raising of utilization ratio of oxygen, and every carrier all is a microreactor like this to the treatment effect has been improved.
The anoxic treatment can form the nutritional condition and environmental condition required by anaerobic microorganisms, and the process of decomposing organic matters in the wastewater and generating methane and carbon dioxide by using the microorganisms mainly plays a role in removing nitrate nitrogen by denitrification and simultaneously removes partial BOD. It also has the function of improving biodegradability through hydrolysis reaction.
Step 3, sewage after the anoxic treatment flows into an aerobic MBBR tank 19 through a second hole 18, aerobic filler is arranged in the aerobic MBBR tank 19, an aeration disc 20, an air duct pipe 21 and an air blower 22 are further arranged on the aerobic MBBR tank 19, the air blower 22 is arranged above the aerobic MBBR tank 19, one end of the air duct pipe 21 is connected with the air blower 22, the other end of the air duct pipe 21 is connected with the aeration disc 20, an air outlet 23 is arranged on the peripheral side of the aeration disc 20, the air blower 22 is started, air is introduced into the aeration disc 20 through the air duct pipe 21 and is discharged from the air outlet 23, and the aerobic MBBR tank 19 is aerated.
And a screen is arranged on the second hole 18 to filter the sewage entering the aerobic MBBR tank 19.
Further, an air passing cavity 24 is formed in the aeration disc 20, a blocking plate 25 is arranged at the bottom end of the air duct pipe 21, an air inlet is formed in the middle of the aeration disc and connected with the air passing cavity 24, the air duct pipe 21 extends into the air inlet, the blocking plate 25 is clamped on the inner side of the air passing cavity 24, the air outlet 23 is arranged in an inclined mode, and after air is blown into the air passing cavity 24, the inclined air outlet 23 automatically drives the aeration disc to rotate, and therefore sufficient aeration is achieved.
The microorganisms of the aerobic filler are fully contacted with the organic matters and oxygen in the sewage, so that the pollutants are easily adsorbed and degraded by the microorganisms, BOD (biochemical oxygen demand) removal, nitrification, phosphorus absorption and the like are carried out in the aerobic MBBR tank 19.
And 4, extending an input pipe of a second water pump 26 into the aerobic MBBR tank 19, conveying the aerated sewage into a flocculant box 27, adding a flocculant into a flocculant pipe 28 at the top of the flocculant box 27, and flowing the flocculant into a settling tank 29 from a flocculant outlet pipe.
The flocculant is prepared by respectively compounding 60% diatom, a polysilicic acid solution and 45% polyferric oxide according to the mass ratio of 50-60:20-30: 10-20.
Can be provided with the puddler in flocculating agent case 27 as required to drive the puddler through the motor and rotate, realize the stirring of flocculating agent and sewage, through flocculating agent and sewage cooperation, further detach matters such as nitrogen, COD, the water color decoloration is effectual.
And 5, precipitating the sewage by the precipitation tank 29, wherein the treated sewage has an upper layer and a lower layer, the upper clear water layer is conveyed into a clear water tank 31 by a third water pump 30, and a clear water pipe 32 is arranged at the bottom of the clear water tank 31 to discharge the clear water.
Step 6, a sludge outlet 33 is formed in the bottom of the settling tank 29, a dredging cylinder 34 is arranged on one side of the settling tank 29, the top of a piston rod of the dredging cylinder 34 extends into the settling tank 29 and is connected with a dredging plate 35, the dredging cylinder 34 is started, and the piston rod moves to drive the dredging plate 35 to discharge sludge from the sludge outlet 33.
In this embodiment, the dredging plate 35 is an inclined surface 36, and the bottom end of the inclined surface 36 is close to the bottom of the sedimentation tank 29, and is arranged obliquely, so that the sludge can be conveniently pushed to the sludge outlet 33.
The inlet pipe of the third water pump 30 is provided with a filter screen 37 for finally filtering the clean water entering the clean water tank 31.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The sewage treatment process with the MBBR is characterized by comprising the following steps:
step 1, sewage flows into a filter screen (3) above a distribution pool (2) through a water inlet (1), and flows into the distribution pool (2) after being filtered;
step 2, sending the sewage into an anoxic MBBR pool (17) through a first pipeline (16) by a first water pump (15) at the bottom of the distribution pool (2), wherein an anoxic filler is arranged in the anoxic MBBR pool (17) for anoxic treatment;
step 3, flowing the sewage subjected to anoxic treatment into an aerobic MBBR tank (19) through a second hole (18), wherein aerobic filler is arranged in the aerobic MBBR tank (19), an aeration disc (20), an air duct pipe (21) and an air blower (22) are further arranged on the aerobic MBBR tank (19), the air blower (22) is arranged above the aerobic MBBR tank (19), one end of the air duct pipe (21) is connected with the air blower (22), the other end of the air duct pipe (21) is connected with the aeration disc (20), an air outlet (23) is arranged on the peripheral side of the aeration disc (20), the air blower (22) is started, and transmits air into the aeration disc (20) through the air duct pipe (21) and discharges the air from the air outlet (23) to aerate the aerobic MBBR tank (19);
step 4, an input pipe of a second water pump (26) extends into the aerobic MBBR tank (19), the aerated sewage is sent into a flocculant box (27), and a flocculant is added into a flocculant pipe (28) at the top of the flocculant box (27) and flows into a settling tank (29) from a flocculant outlet pipe;
and 5, precipitating the sewage by using a precipitation tank (29), wherein the treated sewage has an upper layer and a lower layer, a third water pump (30) transmits a clear water layer on the upper layer into a clear water tank (31), and a clear water pipe (32) is arranged at the bottom of the clear water tank (31) and discharges the clear water.
2. The sewage treatment process with the MBBR according to claim 1, further comprising a step 6, wherein a sludge outlet (33) is arranged at the bottom of the settling tank (29), a dredging cylinder (34) is arranged at one side of the settling tank (29), the top of a piston rod of the dredging cylinder (34) extends into the settling tank (29) and is connected with a dredging plate (35), the dredging cylinder (34) is started, and the piston rod moves to drive the dredging plate (35) to discharge sludge from the sludge outlet (33).
3. The MBBR-carrying wastewater treatment process according to claim 2, wherein the dredging plate (35) is an inclined surface (36), and the bottom end of the inclined surface (36) is close to the bottom of the settling tank (29).
4. The MBBR sewage treatment process according to claim 1, wherein a support frame (4) is arranged above the distribution tank (2), a first motor (5) is arranged on the support frame (4), a cam (6) is arranged on a driving shaft of the first motor (5), a first hole is arranged on the support frame (4), a vibration column (7) is arranged on the first hole, a driving plate (8) is arranged at the top end of the vibration column (7), the bottom end of the vibration column (7) penetrates through the first hole, a rotating wheel (9) is arranged at the bottom of the vibration column, connecting frames (10) are arranged on two sides of the inner wall of the distribution tank (2), a first spring (11) is arranged on each connecting frame (10), one end of the first spring (11) is fixed on the filter screen (3), and the other end of the first spring (11) is fixed on each connecting frame (10), the utility model discloses a vibration column, including vibrations post (7), drive plate (8), second spring (12) have been cup jointed on vibrations post (7), the one end of second spring (12) is fixed on drive plate (8), the other end setting of second spring (12) is on support frame (4), when first motor (5) circular telegram rotates, drive cam (6) and rotate, promote vibrations post (7) in cam (6) pivoted, vibrations post (7) are through second spring (12) reciprocating motion, and in the removal, to filter screen (3) application of force, filter screen (3) also longitudinal reciprocating motion on distribution tank (2) under the effect of first spring (11).
5. The MBBR-carrying sewage treatment process according to claim 1, wherein the filter screen (3) is arranged obliquely, the two connecting frames (10) have different heights, the distribution tank (2) is provided with an opening (13) at the lower side of the filter screen (3), the opening (13) is provided with a cleaning door (14), and when the cleaning door (14) is opened, impurities are removed from the opening (13).
6. The sewage treatment process with the MBBR according to claim 1, wherein an air passing cavity (24) is arranged in the aeration disc (20), a baffle plate (25) is arranged at the bottom end of the air duct pipe (21), an air inlet is formed in the middle of the aeration disc and connected with the air passing cavity (24), the air duct pipe (21) extends into the air inlet, the baffle plate (25) is clamped on the inner side of the air passing cavity (24), the air outlet (23) is obliquely arranged, and after air is blown into the air passing cavity (24), the oblique air outlet (23) drives the aeration disc to rotate.
7. The sewage treatment process with the MBBR according to claim 1, wherein the flocculating agent is prepared by respectively compounding 60% diatom, 45% polymeric ferric oxide and polymeric silicic acid solution according to the mass ratio of 50-60:20-30: 10-20.
8. A process according to claim 1, wherein the inlet of the third pump (30) is provided with a filter screen (37) to effect final filtration of the clean water entering the clean water basin (31).
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| CN202010433883.0A CN111675424A (en) | 2020-07-22 | 2020-07-22 | Sewage treatment process with MBBR |
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Application publication date: 20200918 |