CN111333177A - Mud film biochemical sewage treatment system - Google Patents
Mud film biochemical sewage treatment system Download PDFInfo
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- CN111333177A CN111333177A CN202010258085.9A CN202010258085A CN111333177A CN 111333177 A CN111333177 A CN 111333177A CN 202010258085 A CN202010258085 A CN 202010258085A CN 111333177 A CN111333177 A CN 111333177A
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- 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
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- 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention relates to a sludge membrane biochemical sewage treatment system, which comprises a biochemical tank, wherein a secondary sedimentation tank is arranged in the middle of the biochemical tank, a tank area of the biochemical tank is formed between the side wall of the biochemical tank and the side wall of the secondary sedimentation tank, and the tank area is provided with a sewage inlet end for sewage to enter and a sewage outlet end; the pool area comprises a front end biochemical area and a tail end biochemical area, the front end biochemical area is provided with a sewage inlet end, the tail end biochemical area is provided with a sewage outlet end, and the front end biochemical area and the tail end biochemical area are communicated through an intermediate biochemical area; the sewage output ends of the front end biochemical region and each middle biochemical region are respectively provided with a half partition wall, two sides of each half partition wall are respectively provided with a biomembrane medium biochemical reaction device, and a full partition wall is arranged between the tail end biochemical region and the front end biochemical region. The improved sewage treatment system realizes the combination of an activated sludge method and a biofilm method, the reasonable layout ensures that the contact time of sewage and a biofilm medium is long, the sewage treatment effect is improved, and the system can be implemented on a small occupied area.
Description
Technical Field
The invention relates to the field of sewage treatment.
Background
In the conventional sewage treatment process, the most commonly used secondary treatment system of the activated sludge method comprises a biochemical tank with activated sludge and a secondary sedimentation tank for sludge-water separation, microorganisms grow in a floc form in a suspended manner, the sludge concentration and the treatment load are lower, and the secondary sedimentation tank and the biochemical tank are respectively and independently built tank bodies, so that the floor area is larger. In addition, another system process parallel to the activated sludge process is a biofilm process, microorganisms in the biofilm process are attached to the filler to grow, a secondary sedimentation tank is not usually arranged, the system structure is compact, the treatment load is high, but the operation cost is high. Therefore, the activated sludge process still mainly resorts to for sewage treatment, especially for large-scale sewage treatment capacity, due to its lower operation cost and better stability. However, a single sewage treatment process is difficult to ensure higher effluent quality, and meanwhile, the planning of a sewage treatment plant needs to be improved against the problem that the traditional activated sludge process and the structure thereof mainly face the condition of small field and cannot be effectively arranged under the large background of shortage of the field.
Disclosure of Invention
One technical problem addressed by one aspect of the present disclosure is to provide an improved sewage treatment system.
The technical scheme adopted by the invention for solving the technical problems is as follows: the system comprises a biochemical tank, wherein a secondary sedimentation tank is arranged in the middle of the biochemical tank, a tank area of the biochemical tank is formed between the side wall of the biochemical tank and the side wall of the secondary sedimentation tank, and the tank area is provided with a sewage inlet end for sewage to enter and a sewage outlet end for sewage to be discharged to the secondary sedimentation tank; the pool area comprises a front end biochemical area and a tail end biochemical area, the front end biochemical area is provided with the sewage inlet end, the tail end biochemical area is provided with the sewage outlet end, the front end biochemical area and the tail end biochemical area are communicated through N middle biochemical areas, and N is an integer greater than or equal to zero; the sewage output ends of the front end biochemical regions and the middle biochemical regions are respectively provided with a half partition wall, a water passing channel is arranged below the half partition wall, two sides of each half partition wall are respectively provided with a biomembrane medium biochemical reaction device, and a full partition wall is arranged between the tail end biochemical region and the front end biochemical region.
According to the sludge membrane biochemical sewage treatment system, the pool area is distributed with the aeration components, the aeration components comprise the aerators, the gas transmission pipelines and the control components, the aerators are distributed at the bottom of the pool area, the gas transmission pipelines are connected with the aerators, and the control components are connected with and control the opening and closing of the gas transmission pipelines.
In the sludge membrane biochemical sewage treatment system, the whole partition wall is provided with a backflow control device which is communicated with the tail end biochemical region and the front end biochemical region so as to control partial sewage of the tail end biochemical region to flow back to the front end biochemical region; the control component can independently switch the on-off state of the aeration component in the front end biochemical region.
According to the sludge membrane biochemical sewage treatment system, the upper part of the inner wall of the secondary sedimentation tank is provided with the annularly extending water inlet channel, the water inlet channel is connected with the sewage outlet end through the water inlet weir, the bottom of the water inlet channel is distributed with a plurality of water distribution holes along the length direction, and the water distribution holes are communicated with the sedimentation main tank surrounded in the secondary sedimentation tank; the inner side of the water inlet channel is provided with an annularly extending water outlet channel, the water outlet channel is communicated with the main sedimentation tank to the water outlet pipe, the top of the outer side wall of the water outlet channel is lower than the water surface of the main sedimentation tank to form a water outlet weir, and a scum baffle is arranged outside the water outlet weir.
According to the sludge membrane biochemical sewage treatment system, the width of the water inlet channel is gradually narrowed from the front end to the rear end.
According to the sludge membrane biochemical sewage treatment system, the horizontal baffle plates which are spaced from each other by a certain distance are arranged below the water distribution holes, the longitudinal baffle plates are fixed on the outer sides of the horizontal baffle plates, and a flow guide channel is formed between the horizontal baffle plates and the longitudinal baffle plates.
According to the sludge membrane biochemical sewage treatment system, the center of the bottom plate of the main sedimentation tank is downwards inclined, and a sludge hopper is arranged at the center of the bottom plate; and a sludge collecting device is arranged in the main sedimentation tank to collect and discharge sludge in the sludge hopper.
The sludge membrane biochemical sewage treatment system comprises a sludge suction machine main body, and a sludge scraping plate and a skimming mechanism which are assembled with the sludge suction machine main body, wherein the sludge suction machine main body is erected in the middle of the sedimentation main tank, the sludge scraping plate is arranged at the bottom of the sedimentation main tank, the skimming mechanism is arranged at the upper part of the sedimentation main tank, one end of the sludge suction machine main body corresponds to the sludge hopper, and the other end of the sludge suction machine main body is communicated to a sludge pump room through a sludge pipe.
According to the sludge membrane biochemical sewage treatment system, the sludge pump room is arranged at the edge of the first biochemical area.
In the sludge membrane biochemical sewage treatment system, the biochemical tank is square, the tank area comprises two middle biochemical areas, and the secondary sedimentation tank is round; the front end biochemical region, the N middle biochemical regions and the tail end biochemical region are distributed around the secondary sedimentation tank in sequence, and N is 2.
One advantageous effect brought by one aspect of the present disclosure: the improved sewage treatment system realizes the combination of an activated sludge method and a biomembrane method, and ensures the long contact time of sewage and a biomembrane medium in the treatment process through reasonable layout, so that the sewage treatment effect is improved; and the built-in layout of the secondary sedimentation tank enables the sewage treatment system to be implemented in a small occupied area.
Drawings
Certain embodiments of the invention will now be described in detail, by way of example and not limitation, with reference to the figures, wherein like reference numerals identify identical or similar elements or portions. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale.
In the drawings:
FIG. 1 is a schematic top view of the present invention;
FIG. 2 is a schematic internal top view of the present invention;
FIG. 3 is a schematic cross-sectional view of the overall architecture of the present invention;
FIG. 4 is a first partial schematic view of an inlet channel, an outlet channel, etc. of the present invention;
FIG. 5 is a second partial schematic view of an inlet channel, an outlet channel, etc., of the present invention;
the designations in the figures illustrate the following:
1. a biochemical pool; 100. a front end biochemical region; 101. a first intermediate biochemical region; 102. a second intermediate biochemical region; 103. a terminal biochemical region; 2. a secondary sedimentation tank; 200. a water inlet channel; 2001. a water distribution hole; 2002. a horizontal baffle; 2003. a longitudinal baffle; 201. a water outlet channel; 2010. an effluent weir; 2011. a scum baffle; 2012. a water collection tank; 202. a water outlet pipe; 203. a main precipitation tank; 2030. a water surface; 204. a sludge hopper; 3. a sewage inlet end; 4. a half partition wall; 5. a biomembrane medium biochemical reaction device; 500. a membrane support bracket; 501. a membrane box body; 6. a full partition wall; 7. a horizontal propeller pump; 8. an air main; 800. an air trunk branch; 9. a sludge collection device; 900. a sludge pipe; 901. a suction dredge main body; 902. a mud scraper; 10. a sludge pump house; 11. an aerator.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments.
All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Referring to the attached drawings 1-5, a sludge membrane biochemical sewage treatment system is shown, which comprises a biochemical tank 1, wherein a secondary sedimentation tank 2 is arranged in the middle of the biochemical tank 1, a tank area of the biochemical tank 1 is formed between the side wall of the biochemical tank and the side wall of the secondary sedimentation tank 2, and the tank area is provided with a sewage inlet end 3 for sewage to enter and a sewage outlet end for sewage to be discharged to the secondary sedimentation tank 2; the pool area comprises a front end biochemical area 100 and a tail end biochemical area 103, the front end biochemical area 100 is provided with the sewage inlet end 3, the tail end biochemical area 103 is provided with the sewage outlet end, the front end biochemical area 100 and the tail end biochemical area 103 are communicated through N middle biochemical areas, and N is an integer greater than or equal to zero; the sewage output ends of the front end biochemical regions 100 and the middle biochemical regions are respectively provided with a half partition wall 4, a water passing channel is arranged below the half partition walls 4 and can be formed by water passing square holes, two sides of each half partition wall 4 are respectively provided with a biological film medium biochemical reaction device 5, a full partition wall 6 is arranged between the tail end biochemical region 103 and the front end biochemical region 100, the full partition wall 6 does not need to be limited to a specific shape structure, and the sewage of the tail end biochemical region 103 is blocked by the full partition wall 6 to avoid flowing to the front end biochemical region 100.
In the sludge membrane biochemical sewage system, a biological membrane medium biochemical reaction device is arranged in a pool area of a biochemical pool, and then the secondary sedimentation pool 2 is used for separating sludge and water, so that the combination of an activated sludge method and a biological membrane method is realized, and the sewage treatment effect is effectively improved. In addition, the common biochemical tank 1 and the common secondary sedimentation tank 2 are distributed and distributed, and the floor area is larger, and the secondary sedimentation tank 2 is arranged in the biochemical tank 1 in a built-in mode in the present case, so that the floor area is greatly reduced compared with the prior sewage treatment system, and the sewage treatment system can be implemented in a smaller area.
To ensure that the sewage treatment system with compact layout still has considerable sewage treatment capacity, the pool areas of the biochemical pool 1 are divided into a front biochemical area 100, a middle biochemical area and a tail biochemical area 103 according to the water flow direction. The sewage enters the front end biochemical region 100 through the sewage inlet end 3, then enters the middle biochemical region after passing through the half partition wall 4, and then enters the tail end biochemical region 103 through the half partition wall 4 at the output end of the middle biochemical region. The function of the half partition wall 4 is to reduce the speed of the sewage, so that the sewage has enough holding time to contact with the membrane medium reaction device, and the sewage treatment effect is ensured. Furthermore, a slag-passing square hole may be provided at a position slightly lower than the water surface 2030 above the half partition wall 4, so as to collect and treat the floating materials such as floating slag from the mixed liquid.
The number of the middle biochemical regions can be zero, and the front end biochemical region 100 and the tail end biochemical region 103 are directly connected through the half partition wall 4, but in the scheme, the contact time of the sewage and the membrane medium is short, the treatment effect is limited, and therefore, at least one middle biochemical region is preferably adopted. Referring to the drawings, in one embodiment, the biochemical tank 1 is square, the secondary sedimentation tank 2 is circular, and the tank area of the biochemical tank 1 is formed with four biochemical regions, which are distributed around the secondary sedimentation tank 2 and sequentially include a front biochemical region 100, a first middle biochemical region 101, a second middle biochemical region 102, and a tail biochemical region 103. The sewage flows into the front biochemical area 100, the middle biochemical area and the tail biochemical area 103 in sequence, the flow rate of the sewage is reduced due to the blocking of the half partition wall 4 in the period, and meanwhile, the biological film medium biochemical reaction devices 5 are arranged on two sides of the half partition wall 4, so that the sufficient contact time between the sewage and the biological films can be ensured.
Biofilm medium biochemical reaction device 5 is common generally including membrane box 501 and membrane bearing support 500, and membrane bearing support 500 adopts the channel-section steel according to membrane box 501 size design, material, and the bottom half passes through the bolt fastening with the bearing support, and the bearing support is fixed in the bottom of the pool. The biofilm filler is preferably soft filler, ciliated filler, three-dimensional elastic filler and other classical fixed biofilm fillers, the filler is fixed in the membrane box body 501, and the membrane box body 501 is formed by arranging inclined tubes at intervals so as to facilitate water permeation.
An aeration component is required to be arranged in the pool area of the biochemical pool 1 for aerating and oxygenating the sewage to meet the aerobic condition required by the growth of microorganisms. Aeration components includes the aerator, gas transmission pipeline and control assembly, the even distribution of a plurality of aerators is in the pond district bottom, gas transmission pipeline includes air trunk pipe 8, air trunk pipe 800 and air branch pipe, air trunk pipe 8 encircles around 2 upper portions peripheries in two heavy ponds, it is connected with air conveying equipment, air trunk pipe 800 is connected with air trunk pipe 8, it vertically extends downwards and communicates to air branch pipe, air branch pipe water tiling is established in sediment owner's groove 203 bottom roughly, have corresponding exit end in order to connect each aerator, and the transport of air is mastered by control assembly. The gas is transported through a pipeline, and the state of controlling a switch and the like by arranging a corresponding control component is mature prior art, which is not described herein any more.
In some embodiments, a backflow control device, such as a horizontal propeller pump 7, is installed on the full partition wall 6 to communicate the end biochemical region 103 and the front biochemical region 100, and can backflow a portion of the sewage from the end biochemical region 103 to the front biochemical region 100, and the control module can separately switch the opening and closing of the aeration module corresponding to the front biochemical region 100. This embodiment makes the sewage treatment system applicable to two different sewage treatments: firstly, the horizontal propeller pump is in a closed state, the aeration component works to enable the whole pool area to be in an aerobic state, sewage without denitrification needs can be treated, at the moment, the sewage flows into the secondary sedimentation tank 2 after passing through the pool area, and then mud-water separation is realized. Secondly, the horizontal propeller pump 7 is started to enable the sewage in the tail end biochemical pool 1 to partially flow back to the front end biochemical area 100, meanwhile, the aeration component of the front end biochemical area 100 is closed through the control component, and the front end biochemical area 100 becomes an anoxic area, so that the denitrification treatment of the sewage can be completed.
For the inlet water and the outlet water of the secondary sedimentation tank 2, the following scheme can be adopted: the upper part of the inner wall of the secondary sedimentation tank 2 is provided with a water inlet channel 200 which extends annularly along the circumferential direction, the water inlet channel 200 is connected with the sewage outlet end through a water inlet weir, the bottom of the water inlet channel 200 is distributed with a plurality of water distribution holes 2001 along the length direction, and the water distribution holes 2001 are communicated with a main sedimentation tank 203 which is surrounded in the secondary sedimentation tank 2; the inner side of the inlet channel 200 is provided with an annularly extending outlet channel 201, both the inlet channel 200 and the outlet channel 201 are annular and parallel to each other, the inlet channel 200 is located at the outer side, the outlet channel 201 is located at the inner side, the outlet channel 201 is communicated with the main sedimentation tank 203 to the outlet pipe 202, the top of the outer side wall of the outlet channel 201 is lower than the water surface 2030 of the main sedimentation tank 203 to form an outlet weir 2010, and a scum baffle 2011 is configured outside the outlet weir 2010.
The sewage in the terminal biochemical region 103 flows into the water inlet channel 200 from the sewage outlet end over the water inlet weir, each water distribution hole 2001 at the bottom of the water inlet channel 200 guides the sewage to flow into the main sedimentation tank 203 of the secondary sedimentation tank 2 so as to realize mud-water separation, then the water flows into the water outlet channel 201 over the water outlet weir 2010, the water outlet channel 201 comprises a water collection tank 2012 arranged in the channel, and the water collection tank 2012 collects and clarifies the sewage and then discharges the sewage through the water outlet pipe 202. The outlet weir 2010 is provided with a scum baffle 2011, the outlet weir 2010 is slightly lower than the water surface 2030, the scum baffle 2011 is fixed on the wall surface of the outlet weir 2010 (the outlet channel 201) through a fixing piece, the upper part of the scum baffle 2011 is higher than the water surface 2030, the lower part of the scum baffle 2011 goes deep into water, water passes through gaps between the fixing pieces from the lower part of the scum baffle 2011 and then overflows the outlet weir 2010, and scum floating on the water surface 2030 is blocked by the scum baffle 2011.
The width of the water inlet channel 200 gradually narrows from the front end (close to the sewage outlet end of the terminal biochemical region 103) to the rear end, the aperture of each water distribution hole 2001 is basically consistent, the flow speed of sewage is adjusted through the width change of the water inlet channel 200, and uniform water distribution of each water distribution hole 2001 is facilitated. Preferably, a horizontal baffle 2002 spaced apart from the water distribution holes 2001 is disposed below the water distribution holes, a longitudinal baffle 2003 is fixed to the outer side of the horizontal baffle 2002, and a flow guide channel is formed between the horizontal baffle 2002 and the longitudinal baffle 2003. The sewage flows downwards from the water distribution hole 2001, and the horizontal baffle 2002 and the longitudinal baffle 2003 play a role in baffling, so that the energy of the water flow can be effectively dissipated, and the stable sedimentation of the subsequent sewage in the sedimentation main tank 203 is ensured.
The sewage enters the main sedimentation tank 203 of the secondary sedimentation tank 2 and then the sludge is sedimented at the bottom, so that the sludge is concentrated, the periphery of the bottom plate of the main sedimentation tank 203 is inclined downwards towards the center in the embodiment, the sludge hopper 204 is arranged at the center, the sludge can flow into the sludge hopper 204 along the inclined bottom plate, and then the sludge is discharged through the sludge collecting device 9 arranged in the main sedimentation tank 203.
The sludge collection device 9 can adopt a central transmission single-bridge suction dredge, and comprises a main dredge body 901, and a mud scraping plate 902 and a skimming mechanism which are assembled with the main dredge body 901, wherein the main dredge body 901 is erected in the middle of the main sedimentation tank 203, the mud scraping plate 902 is positioned at the bottom of the main sedimentation tank 203, the skimming mechanism is arranged at the upper part of the main sedimentation tank 203, one end of the main dredge body 901 corresponds to the sludge hopper 204, and the other end of the main dredge body 901 is communicated to the sludge pump room 10 through a sludge pipe 900. The mud scraper 902 works at the bottom of the main sedimentation tank 203 to collect the sludge in the sludge hopper 204, and the sludge in the sludge hopper 204 is sucked to the sludge pipe 900 through the suction dredge body 901 and conveyed to the sludge pump house 10. The skimming mechanism collects the scum floating on the water surface to a scum hopper and then discharges the scum from a scum discharge pipe.
In some embodiments, the sludge pump room 10 is disposed at a vertex angle of the front end biochemical region 100, the sludge pump room 10 needs to be provided with a sludge return pump, a sludge return pipe, a sludge discharge pump and a sludge discharge pipe, the sludge return pump is used for returning part of sludge to the front end biochemical region 100, and the sludge discharge pump outputs the rest of sludge. In the embodiment, the sludge pump room 10 is arranged close to the front end biochemical region 100, so that the compact layout is maintained, the floor area is reduced, and the sludge conveying stroke is shortened.
The preferable working flow of the sludge membrane biochemical sewage treatment system is as follows:
taking the layout shown in the attached fig. 1-2 as an example, unpurified sewage enters the front end biochemical region 100 of the biochemical tank 1 through the sewage inlet end 3, and the mixed liquid of the sewage and the sludge flows from the front end biochemical region 100 in the clockwise direction, passes through the water passing square hole of the half partition wall 4, and sequentially flows around the periphery of the secondary sedimentation tank 2 to the first middle biochemical region 101, the second middle biochemical region 102 and the tail end biochemical region 103 in a pushing manner.
The sewage is fully contacted with the biological membrane at the membrane medium biochemical reaction device of each biochemical area, and the activated sludge which grows in a suspending way and the microorganisms which grow and are attached to the fixed membrane act synergistically under the aeration and oxygenation conditions to realize the removal of organic matters and ammonia nitrogen in the sewage. The front end biochemical region 100 can be flexibly set into an anoxic region for use according to the requirement of treating total nitrogen, and a horizontal propeller pump is used for realizing the reflux of the mixed liquid from the aerobic region (the tail end biochemical region 103) to the anoxic region (the front end biochemical region 100).
The mixed liquid of sewage and sludge overflows from the water inlet weir of the secondary sedimentation tank 2 in the terminal biochemical region 103, enters the water inlet channel 200 of the secondary sedimentation tank 2, flows into the sedimentation main tank 203 from the water distribution hole 2001, is deflected by the water retaining skirting board, descends to the bottom surface of the sedimentation main tank 203, collects towards the center of the tank and rises in layers, the sludge is gradually separated from the sewage due to the self weight in the rising process, and clarified water enters the annular water outlet channel 201 through the water outlet weir 2010 at the top of the tank and is collected to the water outlet channel and discharged from the water outlet pipe 202.
The sludge is settled to the bottom of the pool, the sludge is collected to the sludge hopper 204 through the mud scraping plate 902, the sludge is conveyed to the sludge pump room 10 through the sludge pipe 900 under the action of gravity, part of the sludge is returned to the front end biochemical area 100 of the biochemical pool 1 through the sludge return pump and the sludge return pipe by the sludge pump room 10, and the residual sludge is discharged through the sludge discharge pump and the sludge discharge pipe.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, as it will be apparent to those skilled in the art that various modifications, combinations and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. Biochemical sewage treatment system of mud film, its characterized in that: the system comprises a biochemical tank, wherein a secondary sedimentation tank is arranged in the middle of the biochemical tank, a tank area of the biochemical tank is formed between the side wall of the biochemical tank and the side wall of the secondary sedimentation tank, and the tank area is provided with a sewage inlet end for sewage to enter and a sewage outlet end for sewage to be discharged to the secondary sedimentation tank; the pool area comprises a front end biochemical area and a tail end biochemical area, the front end biochemical area is provided with the sewage inlet end, the tail end biochemical area is provided with the sewage outlet end, the front end biochemical area and the tail end biochemical area are communicated through N middle biochemical areas, and N is an integer greater than or equal to zero; the sewage output ends of the front end biochemical regions and the middle biochemical regions are respectively provided with a half partition wall, a water passing channel is arranged below the half partition wall, two sides of each half partition wall are respectively provided with a biomembrane medium biochemical reaction device, and a full partition wall is arranged between the tail end biochemical region and the front end biochemical region.
2. The sludge membrane biochemical sewage treatment system according to claim 1, wherein: the aeration components are distributed in the pool area and comprise aerators, gas transmission pipelines and control components, the aerators are distributed at the bottom of the pool area, the gas transmission pipelines are connected with the aerators, and the control components are connected with the gas transmission pipelines to control the opening and closing of the gas transmission pipelines.
3. The sludge membrane biochemical sewage treatment system according to claim 2, wherein: a backflow control device communicated with the tail end biochemical region and the front end biochemical region is installed at the full partition wall to control partial sewage of the tail end biochemical region to flow back to the front end biochemical region; the control component can independently switch the on-off state of the aeration component in the front end biochemical region.
4. The sludge membrane biochemical sewage treatment system according to claim 3, wherein: an annularly extending water inlet channel is arranged at the upper part of the inner wall of the secondary sedimentation tank, the water inlet channel is connected with the sewage outlet end through a water inlet weir, a plurality of water distribution holes are distributed at the bottom of the water inlet channel along the length direction of the water inlet channel, and the water distribution holes are communicated with a sedimentation main groove enclosed in the secondary sedimentation tank; the inner side of the water inlet channel is provided with an annularly extending water outlet channel, the water outlet channel is communicated with the main sedimentation tank to the water outlet pipe, the top of the outer side wall of the water outlet channel is lower than the water surface of the main sedimentation tank to form a water outlet weir, and a scum baffle is arranged outside the water outlet weir.
5. The sludge membrane biochemical sewage treatment system according to claim 4, wherein: the width of the water inlet channel is gradually narrowed from the front end to the rear end.
6. The sludge membrane biochemical sewage treatment system according to claim 4, wherein: and a horizontal baffle plate which is separated from the water distribution holes by a certain distance is arranged below each water distribution hole, a longitudinal baffle plate is fixed on the outer side of the horizontal baffle plate, and a flow guide channel is formed between the horizontal baffle plate and the longitudinal baffle plate.
7. The sludge membrane biochemical sewage treatment system according to claim 6, wherein: the center of the bottom plate of the main sedimentation tank is downwards inclined, and a sludge hopper is arranged at the center of the bottom plate; and a sludge collecting device is arranged in the main sedimentation tank to collect and discharge sludge in the sludge hopper.
8. The sludge membrane biochemical sewage treatment system according to claim 7, wherein: the sludge collection device comprises a sludge suction machine main body, and a sludge scraping plate and a skimming mechanism which are assembled with the sludge suction machine main body, wherein the sludge suction machine main body is erected in the middle of the sedimentation main tank, the sludge scraping plate is arranged at the bottom of the sedimentation main tank, the skimming mechanism is arranged on the upper part of the sedimentation main tank, one end of the sludge suction machine main body corresponds to the sludge hopper, and the other end of the sludge suction machine main body is communicated to the sludge pump room through a sludge pipe.
9. The sludge membrane biochemical sewage treatment system according to claim 8, wherein: the sludge pump room is arranged at the edge of the front end biochemical area.
10. The sludge membrane biochemical sewage treatment system according to claim 1, wherein: the biochemical tank is square, and the secondary sedimentation tank is round; the front end biochemical region, the N middle biochemical regions and the tail end biochemical region are distributed around the secondary sedimentation tank in sequence, and N is 2.
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| CN202010258085.9A CN111333177A (en) | 2020-04-03 | 2020-04-03 | Mud film biochemical sewage treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116874003A (en) * | 2023-08-17 | 2023-10-13 | 武汉市仪泰环境科技有限公司 | Sewage sedimentation tank and sedimentation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116874003A (en) * | 2023-08-17 | 2023-10-13 | 武汉市仪泰环境科技有限公司 | Sewage sedimentation tank and sedimentation method |
| CN116874003B (en) * | 2023-08-17 | 2024-02-06 | 武汉市仪泰环境科技有限公司 | Sewage sedimentation tank and sedimentation method |
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