CN111777181A

CN111777181A - Multifunctional composite biofilm reactor

Info

Publication number: CN111777181A
Application number: CN202010719511.4A
Authority: CN
Inventors: 李楠; 白宝帅; 霍磊; 张伟; 唐胜建
Original assignee: Weifang Medical University
Current assignee: Weifang Medical University
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2020-10-16

Abstract

A multifunctional composite biofilm reactor comprises a distribution tank, an anoxic tank, an aerobic tank, a sedimentation tank and a clean water tank; the distribution tank top is provided with the inlet tube, the distribution tank top is violently equipped with the filter screen, be provided with first water pump between distribution tank and the oxygen deficiency pond, first water pump stretches into the distribution tank bottom through first pipeline, the second pipeline setting of first water pump is in the top in the oxygen deficiency pond, accomplish better filter effect on each process, sewage is through the first step treatment of filter screen, the good oxygen and anaerobic biomembrane reaction of result after that to cooperate the aeration pipe aeration, final treatment back is through deposiing, the clean clear water of final filtration play has been improved, compact structure, the effect is ideal.

Description

Multifunctional composite biofilm reactor

Technical Field

The invention relates to the technical field of sewage treatment, in particular to a multifunctional composite biofilm reactor.

Background

At present, domestic sewage in China is expanded from cities to vast rural areas, and non-point source pollution is increasingly serious. Municipal 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 dissolved or colloidal dispersed organic matter, nitrogen-containing compounds, phosphate, potassium, sodium, heavy metal ions, bacteria 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.

The biomembrane process is one of the main technologies for sewage biological treatment, is parallel to the activated sludge process, and is an old and developing sewage biological treatment technology. The biomembrane process is developed based on the principle of soil self-purification, and the biomembrane reactor is formed by adding various fillers into the reactor so as to facilitate the attachment and growth of microorganisms, so that a layer of membrane-like structure formed by organisms is formed on the fillers, and the biological treatment of sewage is realized by utilizing the structure. The biomembrane method is an efficient biological sewage treatment method, has small sludge production amount and no secondary pollution, and has certain application prospect when being used for treating rural domestic sewage.

In the prior art, for example, the publication number "CN 109081440A" is named as "a biofilm reactor sewage treatment device", which discloses "a biofilm reactor sewage treatment device, comprising a first biofilm reactor and a second biofilm reactor, wherein an anaerobic biofilm filler and a guide cylinder are arranged in the first biofilm reactor; the upper part of the guide shell is provided with a first water inlet branch pipe, the lower part of the guide shell is provided with a second water inlet branch pipe, each first water inlet branch pipe is opposite to the upper end of one of the guide shell, each second water inlet branch pipe is opposite to the lower end of one of the guide shell, and the first water inlet branch pipes and the second water inlet branch pipes are arranged at intervals in a staggered mode; a three-phase shunt is arranged in the first biomembrane reactor, and a biological rotating disk is arranged above the three-phase shunt; an annular sleeve is arranged in the second biofilm reactor and divides the second biofilm reactor into an aerobic biofilm reaction zone and a microalgae reaction zone.

However, the method only enhances the sewage mixing effect, does not enhance the whole sewage treatment, and does not effectively remove impurities 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 the multifunctional composite biofilm reactor 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 discloses a multifunctional composite biofilm reactor which is characterized by comprising a distribution tank, an anoxic tank, an aerobic tank, a sedimentation tank and a clean water tank;

a water inlet pipe is arranged at the top of the distribution pool, a filter screen is transversely arranged above the distribution pool, a first water pump is arranged between the distribution pool and the anoxic pool, the first water pump extends into the bottom of the distribution pool through a first pipeline, and a second pipeline of the first water pump is arranged above the anoxic pool;

an anoxic filler is arranged in the anoxic tank, a second water pump is arranged between the anoxic tank and the aerobic tank, the second water pump extends into the bottom of the anoxic tank through a third pipeline, and the second water pump extends into the upper part of the aerobic tank through a fourth pipeline;

an aerobic filler is arranged in the aerobic tank, an air blower is arranged above the aerobic tank, an air outlet pipeline is arranged at the air outlet end of the air blower, an aerator pipe is arranged at the bottom of the aerobic tank, the air outlet pipeline is connected with the aerator pipe, an aerator head is arranged on the aerator pipeline, a third water pump is arranged between the aerobic tank and the sedimentation tank, the third water pump extends into the bottom of the aerobic tank through a fifth pipeline, the water outlet end of the third water pump is connected with a sixth pipeline and a seventh pipeline, the sixth pipeline is arranged above the sedimentation tank, and the seventh pipeline is arranged above the anaerobic tank;

be provided with the fourth water pump between sedimentation tank and the clean water basin, the fourth water pump stretches into the sedimentation tank through the eighth pipeline, and the fourth water pump stretches into the clean water basin through the ninth pipeline.

In order to facilitate the accumulation of the sludge, the invention has the improvement that the bottom of the sedimentation tank is in an inverted trapezoid shape, and the lowest end of the inverted trapezoid shape is provided with a sludge outlet.

In order to further improve the filtering effect, the invention has the improvement that a water inlet pipe of the fourth water pump is provided with a filtering screen.

In order to improve the filtering effect and facilitate the collection of sundries, the invention has the improvement that the filter screen is obliquely arranged.

In order to improve the filtering effect, the invention has the improvement that the anaerobic tank and the aerobic tank are an MBBR anaerobic tank and an MBBR aerobic tank.

In order to facilitate the control of each pipeline, the invention has the improvement that valves for controlling the on-off of the pipelines are arranged on the first water pump, the second water pump, the third water pump and the fourth water pump.

(III) advantageous effects

Compared with the prior art, the invention provides a multifunctional composite biofilm reactor, which has the following beneficial effects:

this multi-functional composite biofilm reactor accomplishes better filter effect on every process, and sewage is through the first step processing of filter screen, and the good oxygen and anaerobic biofilm reaction of result follow to cooperate the aeration pipe aeration, after final treatment through deposiing, finally filter out clean clear water, improved sewage treatment efficiency, compact structure, the effect is ideal.

Drawings

FIG. 1 is a schematic structural diagram of a multifunctional composite biofilm reactor of the present invention.

In the figure: 1. a water distribution tank; 2. an anoxic tank; 3. an aerobic tank; 4. a sedimentation tank; 5. a clean water tank; 6. a water inlet pipe; 7. a filter screen; 8. a first water pump; 9. a first conduit; 10. a second conduit; 11. a second water pump; 12. a third pipeline; 13. a fourth conduit; 14. a blower; 15. an air outlet pipeline; 16. an aeration pipe; 17. an aeration head; 18. a third water pump; 19. a fifth pipeline; 20. a sixth pipeline; 21. a seventh pipe; 22. a fourth water pump; 23. an eighth conduit; 24. a clear water pipe; 25. 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, the multifunctional composite biofilm reactor of the present invention comprises a distribution tank 1, an anoxic tank 2, an aerobic tank 3, a sedimentation tank 4 and a clean water tank 5,

a water inlet pipe 6 is arranged at the top of the distribution pool 1, a filter screen 7 is transversely arranged above the distribution pool 1, a first water pump 8 is arranged between the distribution pool 1 and the anoxic pool 2, the first water pump 8 extends into the bottom of the distribution pool 1 through a first pipeline 9, and a second pipeline 10 of the first water pump 8 is arranged above the anoxic pool 2;

an anoxic filler is arranged in the anoxic tank 2, a second water pump 11 is arranged between the anoxic tank 2 and the aerobic tank 3, the second water pump 11 extends into the bottom of the anoxic tank 2 through a third pipeline 12, and the second water pump 11 extends into the upper part of the aerobic tank 3 through a fourth pipeline 13;

an aerobic filler is arranged in the aerobic tank 3, an air blower 14 is arranged above the aerobic tank 3, an air outlet pipeline 15 is arranged at the air outlet end of the air blower 14, an aerator pipe 16 is arranged at the bottom of the aerobic tank 3, the air outlet pipeline 15 is connected with the aerator pipe 16, an aerator head 17 is arranged on the aerator pipe 16, a third water pump 18 is arranged between the aerobic tank 3 and the sedimentation tank 4, the third water pump 18 extends into the bottom of the aerobic tank 3 through a fifth pipeline 19, the water outlet end of the third water pump 18 is connected with a sixth pipeline 20 and a seventh pipeline 21, the fifth pipeline 20 is arranged above the sedimentation tank 4, and the sixth pipeline 21 is arranged above the anaerobic tank;

be provided with fourth water pump 22 between sedimentation tank 4 and the clean water basin 5, fourth water pump 22 stretches into sedimentation tank 4 through eighth pipeline 23, and fourth water pump 22 stretches into clean water basin 5 through the ninth pipeline.

When the multifunctional composite biomembrane reactor with the novel structure is used, firstly, sewage flows into a filter screen 7 above a distribution tank 1 through a water inlet pipe 6, flows into the distribution tank 1 after being filtered, is subjected to first-step filtering, then, a first water pump 8 is started to convey the sewage to a second pipeline 10 through a first pipeline 9 and enters an anoxic MBBR tank, anoxic fillers in the anoxic MBBR tank are subjected to anoxic treatment, after a second water pump 11 is started, the sewage after the anoxic treatment is conveyed to a fourth pipeline 13 through a third pipeline 12 and enters an aerobic tank 3, the aerobic fillers in the aerobic tank 3 are subjected to aerobic treatment, when the aerobic treatment is carried out, an air blower 14 is started, air enters an aeration pipe 16 through an air outlet pipeline 15 and is finally aerated through an aeration head 17, after the treatment, a third water pump 18 is started to convey the sewage through a fifth pipeline 19, and then the third water pump 18 is selected, generally, during the first treatment, the wastewater flows back to the anaerobic tank through the seventh pipeline 21, the above scheme is circulated, after a plurality of times of treatment, the wastewater is conveyed to the sedimentation tank 4 through the sixth pipeline 20, the sedimentation tank sediments the wastewater, the treated wastewater has an upper layer and a lower layer, the fourth water pump 22 conveys the upper layer of clean water to the ninth pipeline through the eighth pipeline 23 and enters the clean water tank 5, and the bottom of the clean water tank 5 is provided with a clean water pipe 24 for discharging the clean water.

The whole system is reasonable in structure, simple to operate and clean in treatment, and can quickly treat and convey sewage to the clean water tank 5.

In this embodiment, the bottom of sedimentation tank is the trapezoid that falls, the lower extreme that falls the trapezoid is provided with out the silt mouth, makes things convenient for silt to pile up and discharge, and when the clear water extraction clean back, directly connect out the silt mouth with the dredge pump and carry out effective blowdown.

In this embodiment, the water inlet pipe 6 of the fourth water pump 22 is provided with a filter screen 25, which can perform final filtration on the clean water entering the clean water tank 5.

In this embodiment, the filter screen 7 is obliquely arranged, the two connecting frames are different in height, the flow of sewage cannot be influenced by the oblique arrangement, the sewage still passes through the filter screen 7 and is finally deposited in the distribution tank 1, and when the water outlet is flushed, large impurities remained on the sewage filter screen 7 can move towards the lower part along the filter screen 7, the distribution tank 1 is provided with an opening at the lower side of the filter screen 7, the opening is provided with a cleaning door, and when the cleaning door is opened, the impurities can be removed from the opening to prevent the impurities from remaining.

In this embodiment, the anaerobic tank and the aerobic tank 3 are an MBBR anaerobic tank and an MBBR aerobic tank 3, and MBBR is a carrier fluidized bed moving bed biofilm reactor, and the principle is to increase the biomass and the biological species in the reactor by adding a certain amount of suspension carriers into the reactor, thereby increasing the treatment efficiency of the reactor. 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 collision and shearing action of the carriers in water make air bubbles finer, increase the utilization rate of oxygen, and increase the external aerobic bacteria culture, so that each carrier is a micro-reactor, thereby improving the treatment effect.

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.

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.

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

1. A multifunctional composite biofilm reactor is characterized by comprising a distribution tank (1), an anoxic tank (2), an aerobic tank (3), a sedimentation tank (4) and a clean water tank (5);

a water inlet pipe (6) is arranged at the top of the water distribution tank (1), a filter screen (7) is transversely arranged above the water distribution tank (1), a first water pump (8) is arranged between the water distribution tank (1) and the anoxic tank (2), the first water pump (8) extends into the bottom of the water distribution tank (1) through a first pipeline (9), and a second pipeline (10) of the first water pump (8) is arranged above the anoxic tank (2);

an anoxic filler is arranged in the anoxic tank (2), a second water pump (11) is arranged between the anoxic tank (2) and the aerobic tank (3), the second water pump (11) extends into the bottom of the anoxic tank (2) through a third pipeline (12), and the second water pump (11) extends into the upper part of the aerobic tank (3) through a fourth pipeline (13);

an aerobic filler is arranged in the aerobic tank (3), an air blower (14) is arranged above the aerobic tank (3), an air outlet pipeline (15) is arranged at the air outlet end of the air blower (14), an aeration pipe (16) is arranged at the bottom of the aerobic tank (3), the air outlet pipeline (15) is connected with the aeration pipe (16), an aeration head (17) is arranged on the aeration pipe (16), a third water pump (18) is arranged between the aerobic tank (3) and the sedimentation tank (4), the third water pump (18) extends into the bottom of the aerobic tank (3) through a fourth pipeline (13), the water outlet end of the third water pump (18) is connected with a fifth pipeline (19) and a sixth pipeline (20), the fifth pipeline (19) is arranged above the sedimentation tank (4), and the sixth pipeline (20) is arranged above the anaerobic tank;

a fourth water pump (22) is arranged between the sedimentation tank (4) and the clean water tank (5), the fourth water pump (22) stretches into the sedimentation tank (4) through a seventh pipeline (21), and the fourth water pump (22) stretches into the clean water tank (5) through an eighth pipeline (23).

2. The multifunctional composite biofilm reactor of claim 1, wherein the bottom of the sedimentation tank is an inverted trapezoid, and a sludge outlet is arranged at the lowest end of the inverted trapezoid.

3. A multifunctional composite biofilm reactor according to claim 2, characterized in that the inlet conduit (6) of the fourth water pump (22) is provided with a filter screen (25).

4. A multifunctional composite biofilm reactor according to claim 1, characterized in that the filter screens (7) are arranged obliquely.

5. The multifunctional composite biofilm reactor of claim 1, wherein the anaerobic and aerobic tanks (3) are MBBR anaerobic and MBBR aerobic tanks (3).

6. The multifunctional composite biofilm reactor of claim 1, wherein valves for controlling the on-off of the pipes are arranged on the first water pump (8), the second water pump (11), the third water pump (18) and the fourth water pump (22).