CN105776545A - Biological sewage treatment aeration tank with fixed filler layer - Google Patents
Biological sewage treatment aeration tank with fixed filler layer Download PDFInfo
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- CN105776545A CN105776545A CN201610304052.7A CN201610304052A CN105776545A CN 105776545 A CN105776545 A CN 105776545A CN 201610304052 A CN201610304052 A CN 201610304052A CN 105776545 A CN105776545 A CN 105776545A
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- aeration tank
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- 238000005273 aeration Methods 0.000 title claims abstract description 234
- 239000010865 sewage Substances 0.000 title claims abstract description 30
- 239000000945 filler Substances 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 79
- 238000005276 aerator Methods 0.000 claims abstract description 12
- 238000012856 packing Methods 0.000 claims description 111
- 238000000034 method Methods 0.000 claims description 18
- 210000005056 cell body Anatomy 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 5
- 229910052593 corundum Inorganic materials 0.000 claims description 2
- 239000010431 corundum Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 17
- 239000010802 sludge Substances 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 27
- 229910052760 oxygen Inorganic materials 0.000 description 27
- 239000001301 oxygen Substances 0.000 description 27
- 244000005700 microbiome Species 0.000 description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 239000003344 environmental pollutant Substances 0.000 description 8
- 230000004060 metabolic process Effects 0.000 description 8
- 230000008557 oxygen metabolism Effects 0.000 description 8
- 231100000719 pollutant Toxicity 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 206010002660 Anoxia Diseases 0.000 description 4
- 241000976983 Anoxia Species 0.000 description 4
- 206010021143 Hypoxia Diseases 0.000 description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 4
- 230000007953 anoxia Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 230000008676 import Effects 0.000 description 4
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 4
- 230000001737 promoting effect Effects 0.000 description 4
- 238000006722 reduction reaction Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 238000006213 oxygenation reaction Methods 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 235000014653 Carica parviflora Nutrition 0.000 description 1
- 241000243321 Cnidaria Species 0.000 description 1
- 241001450685 Corallium japonicum Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000011081 inoculation Methods 0.000 description 1
- 239000002054 inoculum Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biological Treatment Of Waste Water (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
The invention relates to a biological sewage treatment aeration tank with a fixed filler layer. The biological sewage treatment aeration tank comprises a tank body with a water inlet and a water outlet, and the filler layer arranged in the tank body, wherein aeration guide pipes or aeration guide barrels are vertically distributed in the filler layer, and aerators are distributed in the aeration guide pipes or the aeration guide barrels. Compared with the prior art, the biological sewage treatment aeration tank with the fixed filler layer has the advantages of short membrane-forming time, small produced biological sludge quantity, small occupied floor area, low aeration electricity consumption, good treatment effect and the like, and any of the aerators can be repaired without stopping operation.
Description
Technical field
The invention belongs to environmental protection technical field, especially relate to a kind of Sewage Biological Treatment Aeration tank with fixing packing layer.
Background technology
The common Sewage Biological Treatment Aeration tank with fixing packing layer has contact oxidation method Aeration tank and BAF two kinds, the common feature of these Aeration tanks is the bottom that aeration head is arranged at filler, therefore there is direct the contact with filler of bubble and carry out aeration, bubble causes the shake of filler to produce to rub mutually between filler, affect biofilm and cause filler to wear and tear, packing layer easily blocks, causes the short stream of current simultaneously, when aeration head damages, even to take out the problems such as filler just can keep in repair.
Chinese patent CN103601338A discloses the Aeration tank integrated processor for waste water of a kind of packed bed-step by step, including an aquarium be sequentially provided with preliminary sedimentation tank, Corallium Japonicum Kishinouye packed bed, aeration oxygen replenishing pond, bamboo charcoal particle packed bed, aeration oxygen replenishing pond, slag packed bed, aeration oxygen replenishing pond, second pond in glass.Take full advantage of coral sand, bamboo charcoal particle and slag and microorganism is had good affinity and abundant gap structure, effectively eliminate the nitrogen in sanitary sewage, phosphorus and Organic substance.But this kind of Aeration tank remains without the above-mentioned technological deficiency of solution.
Summary of the invention
Defect that the purpose of the present invention is contemplated to overcome above-mentioned prior art to exist and the Sewage Biological Treatment Aeration tank with fixing packing layer that biological sludge amount is little, floor space is little, aeration power consumption is low that a kind of biofilm time is short, produce is provided.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of Sewage Biological Treatment Aeration tank with fixing packing layer, including:
Offer the cell body of water inlet and outlet,
It is arranged on the packing layer in cell body,
In described packing layer, vertical distribution has aeration flow guiding pipe or aeration flow guiding cylinder, and on this aeration flow guiding pipe or aeration flow guiding cylinder, distribution has aeration head.
Described aeration flow guiding pipe or aeration flow guiding cylinder do not have filler, described aeration head are inserted from above in aeration flow guiding pipe or aeration flow guiding cylinder.Aeration bubbles from aeration head out after move upward in this aeration flow guiding pipe or aeration flow guiding cylinder, and collectively form air-water mixed flow with the above current risen, from the outflow suitable for reading of this aeration flow guiding pipe or aeration flow guiding cylinder, the water surface at Aeration tank forms gush shape current.Meanwhile, the current of packing layer bottom can be drawn in this aeration flow guiding pipe or aeration flow guiding cylinder in the bottom of this aeration flow guiding pipe or aeration flow guiding cylinder.Airlift pump or the principle of air lift pump that this fluid principles of this aeration flow guiding pipe or aeration flow guiding cylinder is known with this professional field are identical.Utilize this principle, arranging several such aeration flow guiding tubular type aerator in packing layer, when aeration, the water of packing layer bottom can constantly be thus lifted to packing layer top, the water simultaneously promoting packing layer top is passed down through packing layer, forms the flowing of a continuous circulation.When current contact with aeration bubbles in this aeration flow guiding pipe or aeration flow guiding cylinder, the oxygen in bubble can dissolve in water, makes the dissolved oxygen concentration in current improve, and produces oxygenic aeration effect.Being downward through packing layer from the top of packing layer again by the current after aeration aerating, so, the dissolved oxygen in current with the biofilm contact of filling surface, can make the microorganism in biomembrane obtain oxygen and carry out oxygen metabolism.But, in the process that current flow downward along packing layer, the dissolved oxygen in current can be consumed totally gradually.When current have arrived certain depth along packing layer sinking, the concentration of ordinary dissolution in current goes to zero, and can not provide dissolved oxygen to the biomembrane of filling surface.Now, the microorganism in the filling surface biomembrane in this region can be caused to be in anaerobic condition and carry out anaerobic metabolism.When microorganism has carried out oxygen metabolism, there is oxidation reaction, the oxidized decomposition of pollutant in water, generate CO2、H2O and NO3、NO2 -Deng；When carrying out anaerobic metabolism, reduction reaction occurring, the nitrogen-containing oxide in water, such as NO3 -、NO2 -It is reduced into N2.Since so, there is aerobic and anoxia two kinds reaction in sewage, it is achieved have A/O or A in the Aeration tank of the present invention simultaneously2The treatment effect of/O technique, namely removes the effect of COD and TN simultaneously.
The described current in cell body are in the vertical direction from up to down through packing layer, and present sinus wave patters up and down and complete processing procedure from inlet flow to outlet, and laterally short stream will not occur current in the upper and lower of packing layer.Based on the above-mentioned current type of flow, in the Aeration tank of the present invention, the pollutant levels in water inlet are to exporting out by import department, and gradually decreased by packing layer top lower portion, present plug flow reactor feature.
Described packing layer is biological packing layer, and the biologic packing material of use is any filler can being fixed in pond of this professional field, for instance can adopt elastic filler, semi soft packing, chalina type 3-D filler etc..
Being 0.3-0.5m at the bottom of the pond of the lower edge distance Aeration tank of packing layer, the water surface of upper edge distance Aeration tank is 0.5-1.5m, and the depth of water of Aeration tank can more than 10m.
The height of aeration flow guiding pipe or aeration flow guiding cylinder and the highly consistent of packing layer or many 0.1-0.3m, its vertical section is rectangle, and cross section is circular or rectangle, diameter or width are 0.1-0.5m, and length is 0.1-10m.
At least provided with an aeration head in aeration flow guiding pipe or aeration flow guiding cylinder, can be any aeration head of this professional field, for instance can adopt corundum or the disc micropore head of rubber pattern, rubber pattern micropore aeration pipe, nozzle type aeration head, perforation type aeration tube etc..
When the depth of water of Aeration tank is 5-10m, the distance of the water surface of the venthole distance Aeration tank of aeration head is 4.5m, when the depth of water of Aeration tank is more than 5 meters, and the aerator that still blast can be adopted to be 49kPa.Because the lower edge of aeration flow guiding pipe is far from only having 0.3-0.5 rice at the bottom of pond, even if so aeration head is positioned at the top of all flow tube from downward 4.5 meters of of the water surface, water bottom pond still can be sucked up and obtain oxygenation and circulation, and unlike other Aeration tank, aeration head must be arranged on 0.1-0.3 rice at the bottom of distance pond and the water bottom pond could be obtained oxygenation and mixing, thus can when not increasing pressure (pressure height can increase power consumption) of aeration aerator, the depth of water of Aeration tank is increased to even 10 meters, such that it is able to air capacity that the floor space of Aeration tank and unit are in aeration consume is greatly reduced, play saving to take up an area, reduce cost and save the effect of aeration energy consumption expense.
Compared with prior art, the present invention have that biofilm time biological sludge amount short, that produce is little, floor space is little, aeration power consumption is low, can not out of service and any one aeration head is keeped in repair, the advantage such as high treating effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the schematic diagram forming aerobic zone and anoxic zone in the present invention.
In figure, 1-cell body, 2-water inlet, 3-deflector, 4-packing layer, 5-aeration flow guiding pipe, 6-air hose, 7-aeration head, 8-outlet.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
A kind of Sewage Biological Treatment Aeration tank with fixing packing layer, its structure is as shown in Figure 1, mainly include the cell body 1 offering water inlet 1 and outlet 8, water inlet 2 place is additionally provided with deflector 3, it is arranged on the packing layer 4 in cell body 1 and the aeration flow guiding pipe 5 that vertical distribution is in packing layer 4, aeration flow guiding pipe 5 does not have filler, aeration head 7 connects air hose 6, and is inserted from above in aeration flow guiding pipe or aeration flow guiding cylinder.Aeration bubbles from aeration head out after move upward in this aeration flow guiding pipe 5, and collectively form air-water mixed flow with the above current risen, from the outflow suitable for reading of this aeration flow guiding pipe 5, the water surface at Aeration tank forms gush shape current.Meanwhile, the current of packing layer bottom can be drawn in this aeration flow guiding pipe 5 in the bottom of this aeration flow guiding pipe 5.Airlift pump or the principle of air lift pump that this fluid principles of this aeration flow guiding pipe 5 is known with this professional field are identical.Utilize this principle, arranging several such aeration flow guiding pipe 5 formula aerator in packing layer, when aeration, the water of packing layer bottom can constantly be thus lifted to packing layer top, the water simultaneously promoting packing layer top is passed down through packing layer, forms the flowing of a continuous circulation.When current contact with aeration bubbles in this aeration flow guiding pipe 5, the oxygen in bubble can dissolve in water, makes the dissolved oxygen concentration in current improve, and produces oxygenic aeration effect.Being downward through packing layer from the top of packing layer again by the current after aeration aerating, so, the dissolved oxygen in current with the biofilm contact of filling surface, can make the microorganism in biomembrane obtain oxygen and carry out oxygen metabolism.But, in the process that current flow downward along packing layer, the dissolved oxygen in current can be consumed totally gradually.When current have arrived certain depth along packing layer sinking, the concentration of ordinary dissolution in current goes to zero, and can not provide dissolved oxygen to the biomembrane of filling surface.Now, the microorganism in the filling surface biomembrane in this region can be caused to be in anaerobic condition and carry out anaerobic metabolism.When microorganism has carried out oxygen metabolism, there is oxidation reaction, the oxidized decomposition of pollutant in water, generate CO2、H2O and NO3、NO2 -Deng；When carrying out anaerobic metabolism, reduction reaction occurring, the nitrogen-containing oxide in water, such as NO3 -、NO2 -It is reduced into N2.Since so, there is aerobic and anoxia two kinds reaction in sewage, it is achieved have A/O or A in the Aeration tank of the present invention simultaneously2The treatment effect of/O technique, namely removes the effect of COD and TN, as shown in Figure 2 simultaneously.
Current in cell body 1 are in the vertical direction from up to down through packing layer, and present sinus wave patters up and down and complete processing procedure from inlet flow to outlet, and laterally short stream will not occur current in the upper and lower of packing layer.Based on the above-mentioned current type of flow, in the Aeration tank of the present invention, the pollutant levels in water inlet are to exporting out by import department, and gradually decreased by packing layer top lower portion, present plug flow reactor feature.
Packing layer 4 is biological packing layer, the any filler can being fixed in pond that biologic packing material is this professional field used, being 0.3m at the bottom of the pond of the lower edge distance Aeration tank of packing layer 4, the water surface of upper edge distance Aeration tank is 0.5m, and the depth of water of Aeration tank can more than 10m.
The height of aeration flow guiding pipe 5 is highly consistent with packing layer 4, and cross section is the circle of diameter 0.1m.When the depth of water of Aeration tank is 5-10m, the distance of the water surface of the venthole distance Aeration tank of aeration head is 4.5m, and when the depth of water of Aeration tank is more than 5 meters, in cell body, the pressure of air is 5m water-column.
Embodiment 2
1. adopting the Aeration tank of the present invention to process certain chemical plant wastewater, the process water yield is 3000m3/ d, the CODcr concentration of water inlet is 300-500mg/L, BOD5/CODcr=0.4, and water temperature is 20-30 degree Celsius, and pH value is 6-8, and ammonia nitrogen concentration is 20-40mg/L, and total nitrogen concentration is 30-60mg/L.
Total dischargeable capacity V of Aeration tank is calculated as follows determining:
R=F/M
F=Q*S (kgBOD5/d)
Q: sewage load (m3/d)
S: the BOD5 concentration (kg/m of sewage3)
M=[in Aeration tank biomembrane gross mass]=[the mean sludge concentration M0 that biomembrane converts to] × [the total dischargeable capacity V of Aeration tank] (kgSS)
M0 presses 3.0kgSS/m3Value
R presses 0.10 (kgBOD5/kgSS.d) value
Result of calculation is
V=F/ (r*M0)=1600m3
HRT=V/Q=12.8h
Total aeration rate of Aeration tank is defined as 14.6m3/min by gas-water ratio (air mass flow of aerator and the ratio of the discharge of sewage) 7.
Adopting elastic filler, the diameter of filler is 150mm, and length is 3.0m.
The depth of water of Aeration tank is 5.0m, 0.3m, upper edge distance Aeration tank water surface 1.5m at the bottom of the lower edge distance Aeration tank of packing layer.
Employing diameter is 0.25m, length be the pipe of 3.2m as guide shell, each in flow cartridge place a diameter be the aeration head of 50mm, solarization air cap is at 4.5m place, underwater, and the total quantity n of aeration head is calculated as follows and determines.
N=[total aeration rate of Aeration tank] ÷ q (individual)
Wherein,
Q: the air mass flow required for single oxygenation blender is 0.08m3/min,
Result of calculation is n=182.
Guide shell is evenly arranged in Aeration tank, and wherein the centre distance pool wall of the guide shell on most limit is 1.0m.
The mud adopting activated sludge aeration pond carries out inoculation membrane formation, and when inoculum concentration is, the MLSS concentration of Aeration tank reaches 1000mg/L, and after putting into seed sludge, continuous aeration carries out biofilm.Aeration is through 3 days time, and the mixed liquor of Aeration tank becomes clear, and MLSS concentration is less than 100mg/L, it was shown that the mud added is attached to filling surface substantially, biofilm success.Start to step up flow of inlet water afterwards until at full capacity.When within 20 days, reaching stabilized treatment, the CODcr concentration of water outlet less than 50mg/L, ammonia nitrogen concentration less than 5mg/L, total nitrogen concentration less than 20mg/L, and produced biological sludge amount is equal load activated sludge aeration pond 15.6%, reached the treatment effect of the present invention.
2. adopting the Aeration tank of the present invention to process the municipal wastewater at certain county town, the process water yield is 10000m3/d, and the CODcr concentration of water inlet is 300-500mg/L, BOD5/CODcr=0.6, and pH value is 6-8, and ammonia nitrogen concentration is 30-50mg/L, and total nitrogen concentration is 40-60mg/L.
The design and calculation method of Aeration tank is ibid.When within 20 days, reaching stabilized treatment, the CODcr concentration of water outlet less than 40mg/L, ammonia nitrogen concentration less than 3mg/L, total nitrogen concentration less than 20mg/L, and produced biological sludge amount is equal load activated sludge aeration pond 20%, reached the treatment effect of the present invention.
Embodiment 3
A kind of Sewage Biological Treatment Aeration tank with fixing packing layer, including the cell body offering water inlet and outlet, being arranged on the packing layer in cell body, in packing layer, vertical distribution has aeration flow guiding pipe, and on this aeration flow guiding pipe, distribution has the disc micropore head of rubber pattern.The packing layer adopted is biological packing layer, and the biologic packing material of use is any filler can being fixed in pond of this professional field, and what adopt in the present embodiment is elastic filler.
It should be noted that do not have filler in aeration flow guiding pipe, described aeration head is inserted from above in aeration flow guiding pipe.Aeration bubbles from aeration head out after move upward in this aeration flow guiding pipe, and collectively form air-water mixed flow with the above current risen, from the outflow suitable for reading of this aeration flow guiding pipe, the water surface at Aeration tank forms gush shape current.Meanwhile, the current of packing layer bottom can be drawn in this aeration flow guiding pipe in the bottom of this aeration flow guiding pipe.Airlift pump or the principle of air lift pump that this fluid principles of this aeration flow guiding pipe is known with this professional field are identical.Utilize this principle, arranging several such aeration flow guiding tubular type aerator in packing layer, when aeration, the water of packing layer bottom can constantly be thus lifted to packing layer top, the water simultaneously promoting packing layer top is passed down through packing layer, forms the flowing of a continuous circulation.When current contact at this aeration flow guiding Guan Zhongyu aeration bubbles, the oxygen in bubble can dissolve in water, makes the dissolved oxygen concentration in current improve, and produces oxygenic aeration effect.Being downward through packing layer from the top of packing layer again by the current after aeration aerating, so, the dissolved oxygen in current with the biofilm contact of filling surface, can make the microorganism in biomembrane obtain oxygen and carry out oxygen metabolism.But, in the process that current flow downward along packing layer, the dissolved oxygen in current can be consumed totally gradually.When current have arrived certain depth along packing layer sinking, the concentration of ordinary dissolution in current goes to zero, and can not provide dissolved oxygen to the biomembrane of filling surface.Now, the microorganism in the filling surface biomembrane in this region can be caused to be in anaerobic condition and carry out anaerobic metabolism.When microorganism has carried out oxygen metabolism, there is oxidation reaction, the oxidized decomposition of pollutant in water, generate CO2、H2O and NO3、NO2 -Deng；When carrying out anaerobic metabolism, reduction reaction occurring, the nitrogen-containing oxide in water, such as NO3 -、NO2 -It is reduced into N2.Since so, there is aerobic and anoxia two kinds reaction in sewage, it is achieved have A/O or A in the Aeration tank of the present invention simultaneously2The treatment effect of/O technique, namely removes the effect of COD and TN simultaneously.
Current in cell body are in the vertical direction from up to down through packing layer, and present sinus wave patters up and down and complete processing procedure from inlet flow to outlet, and laterally short stream will not occur current in the upper and lower of packing layer.Based on the above-mentioned current type of flow, in the Aeration tank of the present invention, the pollutant levels in water inlet are to exporting out by import department, and gradually decreased by packing layer top lower portion, present plug flow reactor feature.
Being 0.3m at the bottom of the pond of the lower edge distance Aeration tank of packing layer, the water surface of upper edge distance Aeration tank is 0.5m, and the depth of water of Aeration tank can more than 10m.The height of aeration flow guiding pipe is highly consistent with packing layer, and its vertical section is rectangle, and cross section is circular, and diameter is 0.1m, and length is 0.1m.When the depth of water of Aeration tank is 5-10m, the distance of the water surface of the venthole distance Aeration tank of aeration head is 4.5m, when the depth of water of Aeration tank is more than 5 meters, and the aerator that still blast can be adopted to be 49kPa
Embodiment 4
A kind of Sewage Biological Treatment Aeration tank with fixing packing layer, including the cell body offering water inlet and outlet, is arranged on the packing layer in cell body, and in packing layer, vertical distribution has aeration flow guiding cylinder, and on this aeration flow guiding cylinder, distribution has nozzle type aeration head.The packing layer adopted is biological packing layer, and the biologic packing material of use is any filler can being fixed in pond of this professional field, and what adopt in the present embodiment is chalina type 3-D filler.
Aeration flow guiding cylinder does not have filler, aeration head are inserted from above in aeration flow guiding cylinder.Aeration bubbles from aeration head out after move upward in this aeration flow guiding cylinder, and collectively form air-water mixed flow with the above current risen, from the outflow suitable for reading of this aeration flow guiding cylinder, the water surface at Aeration tank forms gush shape current.Meanwhile, the current of packing layer bottom can be drawn in this aeration flow guiding cylinder in the bottom of this aeration flow guiding cylinder.Airlift pump or the principle of air lift pump that this fluid principles of this aeration flow guiding cylinder is known with this professional field are identical.Utilize this principle, arranging several such aeration flow guiding cartridge type aerator in packing layer, when aeration, the water of packing layer bottom can constantly be thus lifted to packing layer top, the water simultaneously promoting packing layer top is passed down through packing layer, forms the flowing of a continuous circulation.When current contact with aeration bubbles in this aeration flow guiding cylinder, the oxygen in bubble can dissolve in water, makes the dissolved oxygen concentration in current improve, and produces oxygenic aeration effect.Being downward through packing layer from the top of packing layer again by the current after aeration aerating, so, the dissolved oxygen in current with the biofilm contact of filling surface, can make the microorganism in biomembrane obtain oxygen and carry out oxygen metabolism.But, in the process that current flow downward along packing layer, the dissolved oxygen in current can be consumed totally gradually.When current have arrived certain depth along packing layer sinking, the concentration of ordinary dissolution in current goes to zero, and can not provide dissolved oxygen to the biomembrane of filling surface.Now, the microorganism in the filling surface biomembrane in this region can be caused to be in anaerobic condition and carry out anaerobic metabolism.When microorganism has carried out oxygen metabolism, there is oxidation reaction, the oxidized decomposition of pollutant in water, generate CO2、H2O and NO3、NO2 -Deng；When carrying out anaerobic metabolism, reduction reaction occurring, the nitrogen-containing oxide in water, such as NO3 -、NO2 -It is reduced into N2.Since so, there is aerobic and anoxia two kinds reaction in sewage, it is achieved have A/O or A in the Aeration tank of the present invention simultaneously2The treatment effect of/O technique, namely removes the effect of COD and TN simultaneously.
Current in cell body are in the vertical direction from up to down through packing layer, and present sinus wave patters up and down and complete processing procedure from inlet flow to outlet, and laterally short stream will not occur current in the upper and lower of packing layer.Based on the above-mentioned current type of flow, in the Aeration tank of the present invention, the pollutant levels in water inlet are to exporting out by import department, and gradually decreased by packing layer top lower portion, present plug flow reactor feature.
Being 0.5m at the bottom of the pond of the lower edge distance Aeration tank of packing layer, the water surface of upper edge distance Aeration tank is 1.5m, and the depth of water of Aeration tank can more than 10m.The many 0.3m of height of the aspect ratio packing layer of aeration flow guiding pipe or aeration flow guiding cylinder, its vertical section is rectangle, and cross section is rectangle, and width is 0.5m, and length is 10m.When the depth of water of Aeration tank is 5-10m, the distance of the water surface of the venthole distance Aeration tank of aeration head is 4.5m, when the depth of water of Aeration tank is more than 5 meters, and the aerator that still blast can be adopted to be 49kPa.
Claims (10)
1. with a Sewage Biological Treatment Aeration tank for fixing packing layer, including:
Offer the cell body of water inlet and outlet,
It is arranged on the packing layer in cell body,
It is characterized in that, in described packing layer, vertical distribution has aeration flow guiding pipe or aeration flow guiding cylinder, and in this aeration flow guiding pipe or aeration flow guiding cylinder, distribution has aeration head.
2. a kind of Sewage Biological Treatment Aeration tank with fixing packing layer according to claim 1, it is characterised in that do not have filler, described aeration head to be inserted from above in aeration flow guiding pipe or aeration flow guiding cylinder in described aeration flow guiding pipe or aeration flow guiding cylinder.
3. a kind of Sewage Biological Treatment Aeration tank with fixing packing layer according to claim 1, it is characterized in that, the described current in cell body are in the vertical direction from up to down through packing layer, and present sinus wave patters up and down and complete processing procedure from inlet flow to outlet, will not there is laterally short stream in current in the upper and lower of packing layer.
4. a kind of Sewage Biological Treatment Aeration tank with fixing packing layer according to claim 1, it is characterised in that described packing layer is biological packing layer.
5. a kind of Sewage Biological Treatment Aeration tank with fixing packing layer according to claim 4, it is characterised in that biologic packing material includes elastic filler, semi soft packing or chalina type 3-D filler.
6. a kind of Sewage Biological Treatment Aeration tank with fixing packing layer according to claim 1, it is characterised in that described aeration flow guiding pipe or the height of aeration flow guiding cylinder and the highly consistent of packing layer or many 0.1-0.3m.
7. a kind of Sewage Biological Treatment Aeration tank with fixing packing layer according to claim 1, it is characterised in that at least provided with an aeration head in described aeration flow guiding pipe or aeration flow guiding cylinder.
8. a kind of Sewage Biological Treatment Aeration tank with fixing packing layer according to claim 1 or 7, it is characterized in that, that described aeration head includes corundum or the disc micropore head of rubber pattern, rubber pattern micropore aeration pipe, nozzle type aeration head or perforation type aeration tube.
9. a kind of Sewage Biological Treatment Aeration tank with fixing packing layer according to claim 1, it is characterised in that when the depth of water of Aeration tank is 5-10m, the distance of the water surface of the venthole distance Aeration tank of aeration head is 4.5m.
10. a kind of Sewage Biological Treatment Aeration tank with fixing packing layer according to claim 1, it is characterised in that even if the depth of water of Aeration tank is more than 5 meters, the aerator that still blast can be adopted to be 49kPa.
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| CN201610304052.7A CN105776545A (en) | 2016-05-10 | 2016-05-10 | Biological sewage treatment aeration tank with fixed filler layer |
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| CN201610304052.7A CN105776545A (en) | 2016-05-10 | 2016-05-10 | Biological sewage treatment aeration tank with fixed filler layer |
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| DE202017107020U1 (en) | 2016-11-30 | 2017-11-29 | ALVEST Group s.r.o | Biological sewage treatment plant |
| CN108585317A (en) * | 2018-05-03 | 2018-09-28 | 中国水产科学研究院渔业机械仪器研究所 | Oxidation ditch type micro-hole is aerated aquaculture pond bottom water treatment system and construction method |
| CN114956487A (en) * | 2022-07-04 | 2022-08-30 | 郑州航空港区明港水务有限公司 | Unpowered biological treatment method for sewage with low C/N ratio |
| CN115771946A (en) * | 2022-11-28 | 2023-03-10 | 宁波锦心节能环保科技有限公司 | Energy-saving aeration tank and energy-saving aeration method |
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