CN214571029U - Composite biological reaction tank combining oxidation ditch with MBR (membrane bioreactor) membrane reactor - Google Patents
Composite biological reaction tank combining oxidation ditch with MBR (membrane bioreactor) membrane reactor Download PDFInfo
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- CN214571029U CN214571029U CN202120166962.XU CN202120166962U CN214571029U CN 214571029 U CN214571029 U CN 214571029U CN 202120166962 U CN202120166962 U CN 202120166962U CN 214571029 U CN214571029 U CN 214571029U
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Abstract
The utility model discloses a compound biological reaction pond that oxidation ditch and MBR membrane reactor combine belongs to the water treatment field, has solved the problem that oxidation ditch and MBR membrane reactor are difficult to combine. The utility model discloses an anaerobism pond, leading oxygen deficiency pond, oxidation ditch pond and MBR membrane reaction tank, oxidation ditch pond rear end is equipped with the delivery port, the membrane pond inlet channel links to each other with the delivery port, this junction is equipped with the electric regulation weir door, be equipped with membrane pond backward flow sludge pipe between MBR membrane reaction pond and the oxidation ditch pond, the album mud canal lateral part of MBR membrane reaction pond is equipped with stores up the mud pond, membrane pond backward flow sludge pipe one end is established in storing up mud pond upper end, the other end is established between delivery port department intermediate bottom wall and arc guiding wall, be equipped with membrane pond backward flow sludge pump on the membrane pond backward flow sludge pipe, be equipped with anaerobism pond backward flow sludge pipe between leading oxygen deficiency pond and the anaerobism pond, be equipped with anaerobism pond backward flow sludge pump on the anaerobism pond backward flow sludge pipe. The utility model discloses make oxidation ditch and MBR membrane reactor well combine, the treatment effect is good.
Description
Technical Field
The utility model belongs to the technical field of sewage and recycled water treatment, concretely relates to compound biological reaction pond that oxidation ditch and MBR membrane reactor combine.
Background
With the improvement of the effluent quality standard of the sewage treatment plant and the demand of reclaimed water recycling, the sewage treatment plant can not meet the demand by adopting the original secondary biological treatment, and an advanced treatment facility needs to be added to realize the improvement of the effluent quality standard, so the mode has the defects of long process flow and large occupied area.
The oxidation ditch biological reaction tank is commonly used for a secondary treatment process of biological reaction for sewage treatment; the time-delay aeration method has the characteristics of strong impact load resistance, obvious dissolved oxygen gradient formation on hydraulic circulation, thorough denitrification, good dephosphorization effect of the anaerobic zone and the like. The main defects are large occupied area, effluent can not directly reach the first-grade A or higher standard, sludge concentration is lower, water surface fluctuation is larger, a secondary sedimentation tank is required for sludge-water separation, and the amount of residual sludge is large.
The MBR membrane reactor is a sewage treatment facility combining an activated sludge process and a membrane separation technology, and has the characteristics of good effluent effect (especially high SS removal rate), stable effluent quality, small floor area, no sludge sedimentation problem, small residual sludge amount and the like. The method has the disadvantages of not too large water surface fluctuation, limited dephosphorization effect, weak impact load resistance and the like.
If the oxidation ditch is combined with the MBR membrane reactor, the advantages can be complemented, but the combination process of the oxidation ditch and the MBR membrane reactor is not applied all the time due to the reasons that the water surface fluctuation is large, the concentration change of dissolved oxygen needs to be obvious in the oxidation ditch tank, the oxygen content of sludge reflowing from the MBR membrane tank is high, the sludge reflowing setting is difficult, and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a compound biological reaction pond that oxidation ditch and MBR membrane reactor combine to solve because the surface of water is undulant big, oxidation ditch dissolved oxygen concentration changes and receives influence, mud backward flow sets up difficultly, makes the problem that oxidation ditch and MBR membrane reactor are difficult to combine.
The technical scheme of the utility model is that: a composite biological reaction tank combining an oxidation ditch and an MBR membrane reactor comprises an anaerobic tank, a preposed anoxic tank and an oxidation ditch tank which are sequentially connected, wherein a surface aerator, an arc-shaped guide wall and a middle partition wall are arranged in the oxidation ditch tank, the composite biological reaction tank also comprises an MBR membrane reaction tank, the rear end of the oxidation ditch tank is provided with a water outlet, a membrane tank water inlet channel of the MBR membrane reaction tank is connected with the water outlet, the joint of the membrane tank water inlet channel and the water outlet is provided with an electric regulating weir door, a membrane tank return sludge pipe is arranged between the MBR membrane reaction tank and the oxidation ditch tank, the side part of a sludge collecting channel of the MBR membrane reaction tank is provided with a sludge storage tank communicated with the sludge collecting channel, one end of the membrane tank return sludge pipe is arranged at the upper end of the sludge storage tank, the other end of the membrane tank return sludge pipe is arranged between a middle partition wall at the water outlet and the arc-shaped guide wall, a membrane tank return sludge pump is arranged on the membrane tank return sludge pipe, an anaerobic tank return sludge pipe is arranged between the preposed anoxic tank and the anaerobic tank, an anaerobic tank return sludge pump is arranged on the anaerobic tank return sludge pipe.
As a further improvement, the inner wall of the MBR membrane reaction tank is provided with a liquid level sensor, and the liquid level sensor is connected with the electric regulation weir gate through a PLC.
As a further improvement of the utility model, an internal reflux control weir gate is arranged between the preposed anoxic pond and the oxidation ditch pond.
As the further improvement of the utility model, still include the excess sludge pipe, excess sludge pipe one end is located the mud canal of collection, the excess sludge pipe other end with lead to the external world, be equipped with the excess sludge pump on the excess sludge pipe.
The utility model has the advantages that: the utility model provides an effectively improve treatment effect, the processing procedure is short, sludge concentration is higher, area is little, impact load capacity is strong, no mud subsides the problem, each item technical performance all is superior to single oxidation ditch biological reaction pond or increases the compound biological reaction pond of conventional advanced treatment facility behind the oxidation ditch, it is big to get into membrane reaction pond surface of water fluctuation behind the oxidation ditch, the change of oxidation ditch dissolved oxygen concentration receives the influence, the backward flow mud exports the technical problem that sets up difficultly. Through setting up membrane tank return sludge pipe and anaerobism pond return sludge pipe, make the mixed liquid of mud in the MBR membrane reaction tank flow back step by step to form different mud concentrations, guarantee biological reaction's environmental balance. Wherein, the position setting of membrane pond return sludge pipe is very important, needs the dissolved oxygen gradient of remain stable in the oxidation ditch pond, if backward flow mud exit position chooses improperly, then can cause the interior dissolved oxygen gradient disorder of oxidation ditch pond and then make the oxidation ditch lose its original denitrogenation function. The utility model discloses establish the one end of membrane cisterna return sludge pipe in the upper end of the mud storage pond of collection mud canal lateral part, in the flow process of mud, on the one hand, wherein dissolved oxygen volume releases partly in collection mud canal, and on the other hand, through setting up certain volumetric mud storage pond, make the mixed liquid of mud possess certain dwell time in this region, make dissolved oxygen in the mud obtain further reduction, make finally through the membrane cisterna return sludge pipe flow back to the dissolved oxygen volume in oxidation ditch pond in suitable scope; the other end of the membrane tank return sludge pipe is arranged between the middle partition wall at the water outlet of the oxidation ditch and the arc-shaped guide wall, so that the advantages of the arrangement are as follows: firstly, this department is nearer apart from oxidation ditch pond water inlet position, the mixture that intake and backward flow mud can be very fast basically, can not cause the mud concentration in the oxidation ditch pond inhomogeneous, and backward flow sludge pipe passes through oxidation ditch pond body length shorter, the construction is less with the maintenance degree of difficulty, secondly this arc diversion wall inboard is for the table machine of exposing to the air promptly, this position is the starting point in oxidation ditch oxygenation stage, as long as dissolved oxygen content in the backward flow mud is suitable, low reaches pond section itself is good oxygen section, then can not influence whole oxygen deficiency/good oxygen balanced environment of operation in turn, simultaneously can suitably reduce the power that this table exposes to the air the machine in order to save the energy consumption, backward flow mud export has been solved well and has set up a difficult problem. The electric regulation weir gate is arranged at the joint of the MBR membrane reaction tank and the oxidation ditch tank, the difficulty of large water surface fluctuation is solved, the electric regulation weir gate is connected with a liquid level sensor in the membrane reaction tank through a PLC, the electric regulation weir gate can be automatically controlled and linked with the liquid level in the membrane reaction tank, and the automatic control of the electric regulation weir gate is realized.
The utility model discloses oxidation ditch pond in the compound biological reaction pond is the complete mixing formula flow state, and the rivers circulate constantly in the runner, and actual water conservancy dwell time and sludge age are longer, have remain its anti impact load ability of oxidation ditch technology strong, to the characteristics that the adaptability of water yield, quality of water change is good.
The utility model discloses compound biological reaction pond goes out water after passing through membrane filtration, because the high-efficient separation effect of membrane, separation effect is far better than traditional sedimentation tank, goes out water suspended solid and turbidity concentration low, and bacterium and virus are got rid of by a wide margin, and play water quality of water is superior to the domestic miscellaneous water quality of water standard.
The utility model discloses compound biological reaction pond moves under high volume load, low mud load, and excess sludge production is low, has reduced the sludge treatment expense.
The utility model discloses compound biological reaction pond need not to set up two heavy ponds or newly-increased advanced treatment structures, can reach high standard play water quality of water, has reduced area.
Drawings
Fig. 1 is a schematic plan view of the present invention;
fig. 2 is a sectional view taken along line a-a of fig. 1.
In the figure: 1-an anaerobic tank; 2-anaerobic tank return sludge pipe; 3-preposing an anoxic tank; 4-anaerobic tank reflux sludge pump; 5-internal reflux control weir gate; 6-surface aerator; 7-oxidation ditch pool; 8-electrically adjusting the weir gate; 9-membrane pool water inlet channel; 10-MBR membrane reaction tank; 11-MBR membrane module; 12-a water production pipe; 13-a mud collection channel; 14-a water production pump; 15-water outlet pipe; 16-membrane equipment room; 17-excess sludge pump; 18-excess sludge pipe; 19-membrane tank return sludge pump; 20-membrane tank return sludge pipe; 21-water outlet; 22-a mud storage pool; 23-a liquid level sensor; 24-arc guide walls; 25-intermediate partition wall.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in figures 1 and 2, a composite biological reaction tank combining an oxidation ditch and an MBR membrane reactor comprises an anaerobic tank 1, a preposed anoxic tank 3 and an oxidation ditch tank 7 which are connected in sequence, wherein a surface aerator 6, an arc-shaped guide wall 24 and a middle partition wall 25 are arranged in the oxidation ditch tank 7, the composite biological reaction tank also comprises an MBR membrane reaction tank 10, the rear end of the oxidation ditch tank 7 is provided with a water outlet 21, a membrane tank water inlet channel 9 at the front end of the MBR membrane reaction tank 10 is connected with the water outlet 21, the joint of the membrane tank water inlet channel 9 and the water outlet 21 is provided with an electric regulating weir gate 8, a membrane tank return sludge pipe 20 is arranged between the MBR membrane reaction tank 10 and the oxidation ditch tank 7, the side part of a sludge collecting channel 13 of the MBR membrane reaction tank 10 is provided with a sludge storage tank 22 communicated with the sludge collecting channel 13, one end of the membrane tank return sludge pipe 20 is arranged at the upper end of the sludge storage tank 22, the other end of the membrane tank return sludge pipe 20 is arranged between the middle partition wall 25 at the water outlet 21 and the arc-shaped guide wall 24, the membrane tank return sludge pump 19 is arranged on the membrane tank return sludge pipe 20, the anaerobic tank return sludge pipe 2 is arranged between the preposed anoxic tank 3 and the anaerobic tank 1, and the anaerobic tank return sludge pump 4 is arranged on the anaerobic tank return sludge pipe 2.
The inner wall of the MBR membrane reaction tank 10 is provided with a liquid level sensor 23, and the liquid level sensor 23 is connected with the electric adjusting weir gate 8 through a PLC.
An internal reflux control weir gate 5 is arranged between the preposed anoxic pond 3 and the oxidation ditch pond 7 and is used for refluxing the mixed liquid in the oxidation ditch pond 7.
The device also comprises an excess sludge pipe 18, one end of the excess sludge pipe 18 is positioned in the sludge collecting channel 13, the other end of the excess sludge pipe 18 is communicated with the outside, and an excess sludge pump 17 is arranged on the excess sludge pipe 18.
In the present invention, "front end" and "rear end" are defined according to the water flow direction.
The MBR membrane reaction tank 10 comprises a membrane tank water inlet channel 9, a membrane module 11, a sludge collecting channel 13 and a membrane equipment room 16 which are sequentially arranged, wherein a water production pipe 12 is arranged on the membrane module 11, the water production pipe 12 is connected with a water outlet pipe 15 through a water production pump 14, and the water production pump 14 and the water outlet pipe 15 are both arranged in the membrane equipment room.
Sewage enters the preposed anoxic pond 3 and the oxidation ditch pond 7 in sequence after carrying out dephosphorization reaction in the anaerobic pond 1, biological anoxic and aerobic reaction is carried out in the preposed anoxic pond 3 and the oxidation ditch 7, water flow thrust and aerobic section oxygen supply are provided by the surface aerator 6, then the sewage enters the membrane pond water inlet channel 9 through the electric adjusting weir gate 8, the sewage is distributed to an MBR membrane module 11 channel, filtration and separation are carried out through the MBR membrane module 11, and then water after membrane filtration is sent to the water outlet pipe 15 for output through the water production pump 14 and the water production pipe 12. The opening and closing of the electric regulation weir gate 8 are controlled by the PLC according to the signal of the liquid level sensor 23.
The mud mixed liquor in the MBR membrane reaction tank 10 enters into a mud collecting channel 13, then enters into a mud storage tank 22 at the side part of the mud collecting channel 13, flows back to an oxidation ditch tank 7 through a membrane tank return sludge pump 19 and a membrane tank return sludge pipe 20, then flows back to a preposed anoxic tank 3 through an inner return control weir gate 5, then flows back to an anaerobic tank 1 through an anaerobic tank return sludge pump 4 and an anaerobic tank return sludge pipe 2, and is mixed with inlet water to realize dephosphorization and denitrification. And the sludge mixed liquor flows back step by step to form different sludge concentrations, so that the environmental balance of the biological reaction is ensured. The normal operation of the gradient of the dissolved oxygen in the oxidation ditch can be fully ensured by arranging the sludge storage tank 22 at the side part of the sludge collecting channel 13 and selecting the positions of the water inlet and the water outlet of the membrane tank return sludge pipe 20.
The excess sludge is discharged to a sludge disposal system of a sewage treatment plant through an excess sludge pump 17 and an excess sludge pipe 18.
The utility model discloses the advantage of oxidation ditch and MBR membrane reactor has been combined to the compound biological reaction pond that oxidation ditch and MBR membrane reactor combined, has complemented respective shortcoming, and shock resistance load capacity is strong, and it is little to have area, and surplus sludge is output lowly, goes out the characteristics of water stabilization of quality.
Claims (3)
1. The utility model provides a compound biological reaction pond that oxidation ditch and MBR membrane reactor combined, includes consecutive anaerobism pond (1), leading oxygen deficiency pond (3) and oxidation ditch pond (7), is equipped with in oxidation ditch pond (7) that the table exposes to the sun machine (6), arc guiding wall (24) and well intermediate wall (25), its characterized in that: the anaerobic sludge treatment device is characterized by further comprising an MBR membrane reaction tank (10), a water outlet (21) is arranged at the rear end of the oxidation ditch tank (7), a membrane tank water inlet channel (9) of the MBR membrane reaction tank (10) is connected with the water outlet (21), an electric adjusting weir gate (8) is arranged at the joint of the membrane tank water inlet channel (9) and the water outlet (21), a membrane tank reflux sludge pipe (20) is arranged between the MBR membrane reaction tank (10) and the oxidation ditch tank (7), a sludge storage tank (22) communicated with the sludge collection channel (13) is arranged on the lateral part of the sludge collection channel (13) of the MBR membrane reaction tank (10), one end of the membrane tank reflux sludge pipe (20) is arranged at the upper end of the sludge storage tank (22), the other end of the membrane tank reflux sludge pipe (20) is arranged between an intermediate wall (25) at the water outlet (21) and an arc-shaped diversion wall (24), a membrane tank reflux sludge pump (19) is arranged on the membrane tank reflux sludge pipe (20), and an anaerobic sludge reflux pipe (2) is arranged between the preposed anoxic sludge tank (3) and the anaerobic sludge tank (1), an anaerobic tank return sludge pump (4) is arranged on the anaerobic tank return sludge pipe (2).
2. The composite biological reaction tank with the oxidation ditch combined with the MBR membrane reactor, which is characterized in that: the MBR membrane reaction tank (10) inner wall is equipped with level sensor (23), level sensor (23) link to each other with electric regulation weir gate (8) through PLC.
3. The composite biological reaction tank combining the oxidation ditch with the MBR membrane reactor, which is characterized in that: an internal reflux control weir gate (5) is arranged between the preposed anoxic pond (3) and the oxidation ditch pond (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120166962.XU CN214571029U (en) | 2021-01-21 | 2021-01-21 | Composite biological reaction tank combining oxidation ditch with MBR (membrane bioreactor) membrane reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120166962.XU CN214571029U (en) | 2021-01-21 | 2021-01-21 | Composite biological reaction tank combining oxidation ditch with MBR (membrane bioreactor) membrane reactor |
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| Publication Number | Publication Date |
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| CN214571029U true CN214571029U (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120166962.XU Active CN214571029U (en) | 2021-01-21 | 2021-01-21 | Composite biological reaction tank combining oxidation ditch with MBR (membrane bioreactor) membrane reactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214571029U (en) |
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2021
- 2021-01-21 CN CN202120166962.XU patent/CN214571029U/en active Active
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