CN108394996B - Activated sludge integrated sewage treatment device - Google Patents
Activated sludge integrated sewage treatment device Download PDFInfo
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- CN108394996B CN108394996B CN201810399581.9A CN201810399581A CN108394996B CN 108394996 B CN108394996 B CN 108394996B CN 201810399581 A CN201810399581 A CN 201810399581A CN 108394996 B CN108394996 B CN 108394996B
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- 239000010802 sludge Substances 0.000 title claims abstract description 71
- 239000010865 sewage Substances 0.000 title claims abstract description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 100
- 238000004062 sedimentation Methods 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 35
- 238000007872 degassing Methods 0.000 claims abstract description 32
- 238000005273 aeration Methods 0.000 claims abstract description 26
- 238000002955 isolation Methods 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims description 19
- 238000000926 separation method Methods 0.000 claims description 9
- 230000004888 barrier function Effects 0.000 claims description 6
- 239000008213 purified water Substances 0.000 claims description 5
- 238000004065 wastewater treatment Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 33
- 230000006870 function Effects 0.000 abstract description 8
- 238000010992 reflux Methods 0.000 abstract description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 11
- 239000011259 mixed solution Substances 0.000 description 11
- 229910052698 phosphorus Inorganic materials 0.000 description 11
- 239000011574 phosphorus Substances 0.000 description 11
- 239000007789 gas Substances 0.000 description 8
- 241000894006 Bacteria Species 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 244000005700 microbiome Species 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 229910002651 NO3 Inorganic materials 0.000 description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000002860 competitive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001546 nitrifying effect Effects 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 241001148470 aerobic bacillus Species 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008827 biological function Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000009827 uniform distribution 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
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
-
- 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
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)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention relates to an activated sludge integrated sewage treatment device, which comprises a tank-shaped main body, wherein a pretreatment mesh bag is arranged in the center of the inside of the tank-shaped main body; the pretreatment mesh bag is positioned in a semi-closed area formed by the degassing guide hopper type cylinder and the air isolation hopper type cylinder; an inverted bucket type sedimentation cylinder is arranged on the periphery of the degassing guide bucket type cylinder; a water outlet weir is arranged between the bucket-shaped sedimentation cylinder and the tank-shaped main body; an aeration device is arranged at the bottom of the tank-shaped main body. The sewage treatment device provided by the invention utilizes the bucket-shaped structure to divide the interior of the device into a plurality of functional areas, so that a plurality of functions of an activated sludge sewage treatment process are perfectly combined into a whole; meanwhile, the device provided by the invention can be conveniently processed, transported, installed and maintained, and the equipment such as a sludge reflux pump, a stirrer and the like which are necessary in the conventional process are reduced, so that the process is very simple to maintain, and the running cost is greatly reduced.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to an activated sludge integrated sewage treatment device.
Background
Activated sludge is generated in the sewage biochemical treatment process in a general sense, and microorganisms required for sewage biochemical treatment exist in the activated sludge. The activated sludge sewage treatment process has been widely used in almost all municipal sewage plants and most industrial wastewater treatment facilities for centuries due to its low cost, relatively simple operation technology, and environmental friendliness due to the natural manner of treating sewage.
In a general activated sludge sewage treatment process, under the aeration effect of an aeration head at the bottom of a sewage treatment biochemical tank, sewage and activated sludge in a device can be fully mixed, so that the sewage can be purified under the degradation effect of microorganisms in the activated sludge. The whole biochemical system is provided with an anaerobic area, an anoxic area, an aeration area and an activated sludge sedimentation area, so that the activated sludge can fully complete the whole process of degrading organic matters, removing nitrogen and phosphorus in the contact process with sewage, and finally settling and clarifying supernatant liquid. The activated sludge process has been developed to date in various process forms, such as AAO (schematic diagram of typical AAO process is shown in fig. 1), oxidation ditch, SBR, etc., and the main functions thereof have been developed from simple removal of organic matter to removal of not only organic matter but also denitrification and dephosphorization. The main functional areas of the process are anaerobic, anoxic, aerobic, sedimentation and other functional areas in the biochemical system to realize the effect of removing organic matters and nitrogen and phosphorus.
However, the integrated activated sludge treatment device for smaller flow sewage at present generally adopts an AAO process form, and a plurality of areas are divided in the integrated device so as to enable the device to perform corresponding functions. However, as a result of such arrangement, the structure in the apparatus is complicated, which is not conducive to processing, installation, transportation and on-site operation and maintenance, and the equipment in the facility is more, the management is relatively complicated, and the operation and maintenance costs are high in sewage treatment with a small flow rate.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an activated sludge integrated sewage treatment device.
The aim of the invention is realized by the following specific scheme:
the integrated sewage treatment device provided by the invention comprises a tank-shaped main body, wherein a pretreatment mesh bag connected with a sewage inlet is arranged in the center of the inside of the tank-shaped main body;
the pretreatment mesh bag is positioned in a semi-closed area formed by an inverted degassing guide funnel type cylinder above the pretreatment mesh bag and a right-positioned gas barrier funnel type cylinder below the pretreatment mesh bag; the top of the degassing guide hopper type cylinder is provided with a gas outlet; the bottom of the air separation bucket type cylinder is provided with a mud-water mixture inlet and outlet; a gap for the mud water mixture to pass through is formed between the degassing guide hopper type cylinder and the air isolation hopper type cylinder;
an inverted bucket type sedimentation cylinder is arranged on the periphery of the degassing guide bucket type cylinder; an effluent weir connected with a purified water outlet is arranged between the top of the side wall of the bucket-shaped sedimentation cylinder and the top of the inner side wall of the tank-shaped main body; a gap for the mud water mixture to pass through is formed between the bottom of the side wall of the bucket-shaped sedimentation cylinder and the inner side wall of the tank-shaped main body;
an upward aeration device is arranged at the bottom of the tank-shaped main body.
The term "bucket" as used herein refers to a funnel-shaped structure having sloped sidewalls. The bucket cylinder of the invention specifically refers to a cylindrical structure with open top and bottom and inclined side walls. The bucket type barrel can be in a form that the largest opening is positioned at the top, namely, a bucket type barrel which is arranged right, or in a form that the largest opening is positioned at the bottom, namely, an inverted bucket type barrel. In the present invention, the tank-shaped main body of the sewage treatment apparatus is preferably a bucket tank, i.e., a tank-shaped container with an inclined side wall, a maximum opening at the top and a closed bottom.
Specifically:
the main purpose of the present invention, employing a preconditioning mesh bag, is to construct an anaerobic zone. The mesh bag structure can enable the activated sludge to enter and exit the anaerobic area through the pores of the mesh bag, so that the biological function of the activated sludge is realized. And the sewage to be treated is introduced into the pretreatment mesh bag and then mixed with the activated sludge to form a mixed solution of the activated sludge and the sewage (the invention is called as mud-water mixed solution for short). The pretreatment mesh bag can realize the function of anaerobic phosphorus release of microorganisms and can also play a role in intercepting sundries and sand grains to a certain extent. The activated sludge contains phosphorus accumulating bacteria and nitrifying bacteria.
The specific structure of the pretreatment mesh bag only needs to realize the purpose of constructing an anaerobic zone and leading activated sludge to come in and go out. As a specific embodiment of the present invention, the structure of the pretreatment mesh bag may adopt a structure disclosed in patent document CN105327541a, specifically comprising an inner layer and an outer layer, the outer layer mesh bag being divided into an upper portion and a lower portion; the mesh densities of the inner layer mesh bag, the outer layer upper part mesh bag and the outer layer lower part mesh bag are sequentially increased.
An anaerobic zone is formed in the pretreatment mesh bag, and the periphery of the anaerobic zone is an anoxic zone; as anoxic biochemical actions occur in the anoxic zone, substances having oxidizing properties such as dissolved oxygen and nitrate have been consumed in the denitrification process, the oxidation-reduction potential inside the pretreatment mesh bag is further reduced to form an anaerobic zone. The sludge-water mixed solution also enters the mesh bag under the exchange action, and in the case, phosphorus accumulating bacteria in the activated sludge can obtain energy by releasing phosphorus under anaerobic conditions, so that a competitive advantage is obtained, and phosphate can be absorbed after the sludge enters the aeration environment again, so that the total phosphorus content of the effluent is reduced. The anaerobic condition ensures that the phosphorus accumulating bacteria can obtain better competitive advantage in the activated sludge, thereby ensuring that the system has higher biological phosphorus removal efficiency.
The pretreatment mesh bag is positioned in a semi-closed area formed by an inverted degassing guide funnel type cylinder above the pretreatment mesh bag and a right-positioned air isolation funnel type cylinder below the pretreatment mesh bag, and the area is equivalent to an anoxic area in the conventional activated sludge sewage treatment process. The top of the degassing guide hopper type cylinder is provided with a gas outlet; the bottom of the air separation bucket type cylinder is provided with a mud-water mixture inlet and outlet; a gap for the mud-water mixture to pass through is arranged between the degassing guide funnel type cylinder and the air isolation funnel type cylinder.
The invention adopts the degassing guide funnel type cylinder and the air isolation funnel type cylinder to form a semi-closed area at the periphery of the pretreatment mesh bag, so that the sewage inlet (which is led into the pretreatment mesh bag) is fully separated from the aeration area, and an anoxic area is formed inside the degassing guide funnel type cylinder and the air isolation funnel type cylinder. The inclined structure of the degassing guide bucket can avoid sludge accumulation, is favorable for uniform distribution of hydraulic flow states, can separate bubbles entering the anoxic zone from mud-water mixed liquid, is favorable for aggregation, rising and falling of the bubbles along the side surface of the bucket, and avoids accumulation in the anoxic zone; the inclined surface of the air isolation bucket type cylinder is beneficial to the free sliding of the sludge on the cylinder wall to the outside of the anoxic zone, so that the phenomena of blockage, agglomeration, mud death and the like caused by the sludge accumulation in the cylinder body are avoided. The muddy water mixed solution inside and outside the semi-closed area is mutually exchanged through the muddy water mixture inlet and outlet at the bottom of the gas separation bucket type cylinder and the gap between the degassing guide bucket type cylinder and the gas separation bucket type cylinder, namely, the mixed solution inside the area can enter the outside of the area, and the mixed solution outside the area can also enter the inside of the area, thereby realizing the denitrification effect, and the sewage entering the device can be smoothly and downwards diffused into the aeration area of the device in the process, thereby saving the necessary mixed solution internal reflux facilities and the operation cost of the conventional activated sludge process with the denitrification function.
In order to facilitate the mutual exchange of muddy water mixed solution through the gap between the degassing guide bucket cylinder and the air separation bucket cylinder and fully realize the removal of organic matters and phosphorus-containing and nitrogen-containing compounds in sewage, the height of the gap between the degassing guide bucket cylinder and the air separation bucket cylinder is preferably not lower than the top end of the pretreatment mesh bag; the maximum opening diameter of the degassing guide bucket type cylinder is preferably larger than that of the air isolation bucket type cylinder.
In the invention, a flow restrictor is preferably arranged right below a mud-water mixture inlet and outlet at the bottom of the gas barrier bucket type cylinder. The purpose of the restrictor is to reduce the upward direct flushing of bubbles generated in the aeration zone into the anoxic zone to ensure a further reduction in dissolved oxygen concentration in the anoxic zone. The flow restrictor is preferably polygonal (e.g., pyramid, prism, etc.) or spherical in shape to avoid sludge deposition on its surface.
The bottom of the tank-shaped main body is provided with an upward aeration device. The aeration device is preferably a plurality of groups of aeration heads which are uniformly distributed and is connected with a blower arranged outside the bucket-shaped tank.
An aeration area in the traditional activated sludge sewage treatment process is arranged above the aeration device; in the area, the activated sludge can fully degrade organic matters in the sewage in the presence of oxygen, namely, a large amount of COD is removed; meanwhile, ammonia nitrogen in the water is oxidized into nitrate or nitrite by nitrifying bacteria in the activated sludge in the process, so that the ammonia nitrogen index in the water can be sufficiently reduced; in addition, phosphate in the mixed solution can be fully absorbed by phosphorus accumulating bacteria in the activated sludge in the aerobic process, so that the phosphate content in water is greatly reduced.
In the practical application process, because the bubbles upwardly exposed by the aeration device are blocked by the degassing guide hopper type cylinder and the air isolation hopper type cylinder and cannot enter a semi-closed area surrounded by the degassing guide hopper type cylinder and the air isolation hopper type cylinder in a large amount, a small amount of oxygen in the semi-closed area can be rapidly consumed by aerobic bacteria in the activated sludge to form an anoxic state, namely an anoxic area; the muddy water mixed solution in the aeration area enters the anoxic area under the action of hydraulic exchange, and the mixed solution contains a large amount of nitrate or nitrite converted from ammonia nitrogen, and the substances are reduced into nitrogen by denitrifying bacteria in the activated sludge in the anoxic area, overflows the water body and is discharged from the top of the degassing guide hopper cylinder.
The periphery of the degassing guide bucket type cylinder is provided with an inverted bucket type sedimentation cylinder; an effluent weir connected with a purified water outlet is arranged between the top of the side wall of the bucket-shaped sedimentation cylinder and the top of the inner side wall of the tank-shaped main body.
The degassing guide bucket type cylinder, the side wall of the tank-shaped main body and the water outlet weir form a sludge sedimentation zone in the traditional activated sludge water treatment process. The sludge sedimentation area and the aeration area are simply separated by the bucket sedimentation cylinder, so that a sludge water mixture can be ensured to enter the sludge sedimentation area from a gap between the bottom of the side wall of the bucket sedimentation cylinder and the inner side wall of the tank-shaped main body, wherein heavier sludge is directly sedimentated into the aeration area from the sedimentation area along the side wall of the bucket sedimentation cylinder, and the necessary sludge external reflux facilities and operation cost of the conventional activated sludge sewage process are saved; and because the gaps are narrow, bubbles are difficult to pass through, disturbance of aeration bubbles is basically avoided in a sedimentation area, the flow state of mixed liquid is stable, active sludge and water are naturally separated, the sludge is naturally submerged, and the treated water naturally rises and is discharged from an effluent weir at the upper part.
In order to enhance the mud-water separation function and prevent bubbles from entering the area below the water outlet weir, the invention preferably arranges at least one group of mud-water guide bucket barrels below the water outlet weir; the position of the mud water guide bucket type cylinder can be located above and/or below the side wall of the bucket type sedimentation cylinder. Gaps are formed between the mud water guide bucket type cylinder and the bucket type sedimentation cylinder, between the mud water guide bucket type cylinder and the inner side wall of the tank main body and between the mud water guide bucket type cylinders of each group, so that a channel is formed for mud water mixed liquid to pass freely. According to the invention, by arranging the muddy water diversion bucket type cylinder, bubbles can be prevented from entering the area below the water outlet weir, so that the water entering the area below the water outlet weir is less disturbed by the bubbles, a small amount of sludge in the water is further precipitated, and the water entering the water outlet weir is ensured to be clearer. Because the structures in the sedimentation areas are all obliquely arranged, the sludge can smoothly slide along each inclined plane, and the sedimentation of the sludge at each position can be fully avoided, so that the discharged water can be prevented from being influenced by the accumulation of the sludge.
In practical application, the setting mode of the mud water diversion bucket type cylinder can be as follows: a group of upright mud water guide bucket type barrels are arranged above the side wall of the bucket type sedimentation barrel; or, a group of inverted mud water guide bucket type barrels are arranged above the side wall of the bucket type sedimentation barrel; or two groups of mud water guide bucket type barrels are arranged above the side wall of the bucket type sedimentation barrel, wherein any one group is an inverted mud water guide bucket type barrel, and the other group is a vertically arranged mud water guide bucket type barrel; or, a group of inverted mud water diversion bucket type barrels are respectively arranged above and below the side wall of the bucket type sedimentation barrel. The above mode can ensure that the influence of bubbles can be reduced as much as possible when mud-water separation enters the precipitation area, thereby ensuring the clarification of the effluent water and further improving the water quality effect.
The invention further provides a method comprising the step of carrying out a treatment step with said sewage treatment device.
The sewage is subjected to a series of processes such as aeration and the like, activated sludge is gradually formed in a treatment system, and after the activated sludge reaches a certain concentration, microorganisms in the activated sludge can fully remove organic matters in the sewage. Then the activated sludge is precipitated by precipitation, and the supernatant fluid can be discharged. The whole sludge culture process, i.e. the biochemical treatment process, generally requires one to two months.
The integrated sewage treatment device provided by the invention ingeniously utilizes the bucket-shaped structure, and an anoxic zone, an anaerobic zone, an aerobic zone and a sludge sedimentation zone are naturally formed in the treatment device, so that several functions of the conventional activated sludge sewage treatment process are perfectly combined into a whole; the tank body and the internal main body structure of the device basically adopt bucket-shaped cylinder structures, and are mutually overlapped and simple; the device can be stacked and placed in the transportation process, so that the transportation space is fully saved, and one vehicle can transport a plurality of groups of devices, so that the transportation cost can be greatly saved, and the device is convenient for on-site processing and installation; and because the necessary equipment such as a sludge reflux pump, a stirrer and the like in the conventional activated sludge process are reduced, the process is very simple to maintain, and the running cost is also greatly reduced.
Drawings
FIG. 1 is a schematic flow diagram of a typical AAO process;
FIG. 2 is a schematic view of the integrated sewage treatment apparatus according to example 1;
FIG. 3 is a schematic view of the integrated sewage treatment apparatus according to embodiment 2;
FIG. 4 is a schematic view of the integrated sewage treatment apparatus according to embodiment 3;
FIG. 5 is a schematic view of the integrated sewage treatment apparatus according to example 4;
fig. 2 to 5 show: 1. a bucket-type tank; 2. a bucket-type sedimentation cylinder; 4. pretreating a mesh bag; 5. an air-isolation bucket type cylinder; 6. a degassing guide bucket; 7. a sewage inlet to be treated; 8. a purified water outlet; 9. an aeration head; 10. a water outlet weir; 11. a flow restrictor; 3. and 12 are mud water guide bucket type barrels.
Detailed Description
The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
Example 1
The embodiment provides an activated sludge integrated sewage treatment device (the structure is shown in figure 2), which comprises a bucket-shaped tank 1, wherein a pretreatment mesh bag 4 connected with a sewage inlet is arranged in the center of the interior of the bucket-shaped tank 1;
the pretreatment mesh bag 4 is positioned in a semi-closed area formed by an inverted degassing guide funnel type cylinder 6 above the pretreatment mesh bag and an upright gas barrier funnel type cylinder 5 below the pretreatment mesh bag; the top of the degassing guide hopper type cylinder 6 is provided with a gas outlet; the bottom of the air-isolation bucket type cylinder 5 is provided with a mud-water mixture inlet and outlet; a gap for the mud water mixture to pass through is formed between the degassing guide hopper type cylinder 6 and the air isolation hopper type cylinder 5;
an inverted bucket type sedimentation cylinder 2 is arranged on the periphery of the degassing guide bucket type cylinder 6; an effluent weir 10 connected with a purified water outlet 8 is arranged between the top of the side wall of the bucket-shaped sedimentation cylinder 2 and the top of the inner side wall of the bucket-shaped tank 1; a gap for the mud water mixture to pass through is formed between the bottom of the side wall of the bucket-shaped sedimentation cylinder 2 and the inner side wall of the bucket-shaped tank 1; a group of upright mud water guide bucket type barrels 3 are arranged below the water outlet weir 10 and above the side wall of the bucket type sedimentation barrel 2, gaps are formed between the mud water guide bucket type barrels 3 and the bucket type sedimentation barrel 2 and between the mud water guide bucket type barrels 3 and the inner side wall of the bucket type tank 1, and a channel is formed for a mud water mixture to pass freely;
the bottom of the tank-shaped main body is provided with an aeration head 9 for upward aeration.
Example 2
The embodiment provides an activated sludge integrated sewage treatment device (the structure is shown in figure 3).
Compared with example 1, the only difference is that: a group of inverted mud water guide bucket type barrels 3 are arranged below the water outlet weir 10 and above the side wall of the bucket type sedimentation barrel 2; gaps are formed between the mud water guide bucket cylinder 3 and the bucket type sedimentation cylinder 2 and between the mud water guide bucket cylinder 3 and the side wall of the bucket type tank 1, so that a channel is formed for the mud water mixture to pass freely.
Example 3
The embodiment provides an activated sludge integrated sewage treatment device (the structure is shown in figure 4).
Compared with example 1, the only difference is that: a group of upright mud water guide bucket type barrels 3 and a group of inverted mud water guide bucket type barrels 12 are sequentially arranged below the water outlet weir 10 and above the side wall of the bucket type sedimentation barrel 2 from bottom to top; gaps are formed between each of the mud water guide bucket type barrels 3 and 12 and the bucket type sedimentation barrel 2, between each of the mud water guide bucket type barrels 3 and 12 and the side wall of the bucket type tank 1 and between each of the mud water guide bucket type barrels 3 and 12, so that a channel is formed for the mud water mixture to pass freely.
Example 4
The embodiment provides an activated sludge integrated sewage treatment device (the structure is shown in figure 5).
Compared with example 1, the only difference is that: a group of inverted mud water guide bucket type barrels 3 are arranged below the water outlet weir 10 and above the side wall of the bucket type sedimentation barrel 2, and a group of inverted mud water guide bucket type barrels 12 are arranged below the bucket type sedimentation barrel 2; gaps are formed between each of the mud water guide bucket type barrels 3 and 12 and the bucket type sedimentation barrel 2, between each of the mud water guide bucket type barrels 3 and 12 and the side wall of the bucket type tank 1 and between each of the mud water guide bucket type barrels 3 and 12, so that a channel is formed for the mud water mixture to pass freely.
The device provided by the embodiment is internally and naturally divided into an anoxic zone, an anaerobic zone, an aerobic zone and a sludge sedimentation zone, so that several functions of the conventional activated sludge sewage treatment process are perfectly combined into a whole, the efficient purification of sewage can be realized, and the operation cost is low due to the reduction of equipment such as a necessary sludge reflux pump, a stirrer and the like in the conventional activated sludge process.
While the invention has been described in detail in the foregoing general description, embodiments and experiments, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (8)
1. The activated sludge integrated sewage treatment device is characterized by comprising a tank-shaped main body, wherein the tank-shaped main body is a bucket-shaped tank which is arranged in a positive manner; the center of the interior of the tank-shaped main body is provided with a pretreatment mesh bag connected with a sewage inlet; the pretreatment mesh bag comprises an inner layer and an outer layer, and the outer layer mesh bag is divided into an upper part and a lower part; the mesh densities of the inner layer mesh bag, the outer layer upper part mesh bag and the outer layer lower part mesh bag are sequentially increased;
the pretreatment mesh bag is used for constructing an anaerobic area, and the mesh bag structure of the pretreatment mesh bag enables activated sludge to enter and exit the anaerobic area through pores of the mesh bag;
the pretreatment mesh bag is positioned in a semi-closed area formed by an inverted degassing guide funnel type cylinder above the pretreatment mesh bag and a right-positioned gas barrier funnel type cylinder below the pretreatment mesh bag; the top of the degassing guide hopper type cylinder is provided with a gas outlet; the bottom of the air separation bucket type cylinder is provided with a mud-water mixture inlet and outlet; a gap for the mud water mixture to pass through is formed between the degassing guide hopper type cylinder and the air isolation hopper type cylinder;
an inverted bucket type sedimentation cylinder is arranged on the periphery of the degassing guide bucket type cylinder; an effluent weir connected with a purified water outlet is arranged between the top of the side wall of the bucket-shaped sedimentation cylinder and the top of the inner side wall of the tank-shaped main body; a gap for the mud water mixture to pass through is formed between the bottom of the side wall of the bucket-shaped sedimentation cylinder and the inner side wall of the tank-shaped main body;
an upward aeration device is arranged at the bottom of the tank-shaped main body.
2. The sewage treatment apparatus according to claim 1, wherein a height of a gap between the degassing guide bucket cylinder and the air barrier bucket cylinder is not lower than a top end of the pretreatment mesh bag.
3. The wastewater treatment apparatus of claim 1, wherein a maximum opening diameter of the degassing guide scoop is greater than a maximum opening diameter of the gas barrier scoop.
4. The sewage treatment apparatus according to claim 1, wherein a restrictor is provided right under the sludge-water mixture inlet and outlet; the flow restrictor is polygonal or spherical.
5. The sewage treatment device according to claim 1, wherein at least one group of mud water guide bucket type barrels are arranged below the water outlet weir; the mud water diversion bucket type cylinder is positioned above and/or below the side wall of the bucket type sedimentation cylinder;
gaps are formed between the mud water guide bucket type cylinder and the bucket type sedimentation cylinder, between the mud water guide bucket type cylinder and the inner side wall of the tank-shaped main body and between the mud water guide bucket type cylinders of each group.
6. The sewage treatment apparatus according to claim 5, wherein a set of upright mud water guide bucket type barrels are arranged above the side wall of the bucket type sedimentation barrel;
or a group of inverted mud water guide bucket type barrels are arranged above the side wall of the bucket type sedimentation barrel;
or two groups of mud water guide bucket-shaped barrels are arranged above the side wall of the bucket-shaped sedimentation barrel; one group of the mud water guide bucket type barrels is inverted, and the other group of the mud water guide bucket type barrels is upright;
or, a group of inverted mud water diversion bucket type barrels are respectively arranged above and below the side wall of the bucket type sedimentation barrel.
7. The wastewater treatment device according to claim 1, wherein the aeration device is a plurality of groups of aeration heads which are uniformly arranged.
8. A sewage treatment method, characterized by comprising the step of treating by using the sewage treatment apparatus according to any one of claims 1 to 7.
Priority Applications (1)
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|---|---|---|---|
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| CN105236552A (en) * | 2015-10-30 | 2016-01-13 | 浦华环保股份有限公司 | Sewage treatment integrated device enabling gravitational self-refluxing of activated sludge |
| CN105327541A (en) * | 2015-10-30 | 2016-02-17 | 浦华环保股份有限公司 | Small-flow sewage pre-treatment device |
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| RU2010149353A (en) * | 2010-12-03 | 2012-06-10 | Общество с ограниченной ответственностью "ЕВРОБИОН" (RU) | METHOD FOR EFFECTIVE SEWAGE TREATMENT AND DEVICE FOR EFFECTIVE SEWAGE TREATMENT |
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