CN203741119U - Activated sludge sewage treatment device - Google Patents
Activated sludge sewage treatment device Download PDFInfo
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- CN203741119U CN203741119U CN201420103754.5U CN201420103754U CN203741119U CN 203741119 U CN203741119 U CN 203741119U CN 201420103754 U CN201420103754 U CN 201420103754U CN 203741119 U CN203741119 U CN 203741119U
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Abstract
The utility model discloses an activated sludge sewage treatment device. The activated sludge sewage treatment device comprises a biochemical pool and a secondary settling pool, wherein the outlet of the biochemical pool is communicated with the inlet of the secondary settling pool; the activated sludge outlet of the second settling pool is communicated with the inlet of the biochemical pool; an anaerobic region, an anoxic region, an aerobic region, an internal settling region and a rear aerobic region are arranged in the biochemical pool in sequence in a sludge flowing direction; the anaerobic region is communicated with the inlet of the biochemical pool; the rear aerobic region is communicated with the outlet of the biochemical pool; the internal settling region comprises a settling region and an activated sludge collection region; an activated sludge collection pipe is arranged in the settling region; a plurality of collection holes are formed in the activated sludge collection pipe; the end of the activated sludge collection pipe is communicated with the activated sludge collection region. According to the activated sludge sewage treatment device, the sludge concentration of the biochemical pool is greatly improved on the premise of keeping the capacity of the conventional biochemical pool, moreover, the concentration of the activated sludge entering the secondary settling pool is also reduced, the water outlet quality of the secondary settling pool is improved, the reflux quantity of the secondary settling pool is low, and the phosphorus release capability of the biochemical pool is improved.
Description
Technical field
The utility model relates to technical field of sewage, particularly active sludge waste disposal plant.
Background technology
Activated sludge process is the main technique of sewage disposal, has now been widely used in the processing of municipal wastewater and the processing of various industrial sewage.The cardinal principle of this technique is the pollutent in the microorganism trapping sewage of cultivating by biochemistry pool, then in second pond, precipitates.Under the effect of aeration, microorganism is the pollutent in degradation water significantly; While, the undegradable pollutent overwhelming majority can precipitate in company with active sludge in second pond, and the water outlet of second pond is clarified under the effect of the flocculation sediment of microorganism.In conventional municipal wastewater is processed, the water outlet of this technique, can reach " municipal sewage plant's pollutant emission standard " one-level B emission standard in (GB2002).
According to the relevant theory of second pond, the mud amount that enters second pond is fewer, and the outlet effect of second pond is better.But for general activated sludge process, the active sludge that enters second pond is few, mean that the active mud content of biochemistry pool is on the low side, illustrate that the activated sludge loading of biochemical zone is higher, can pollute the phenomenon that thing removal effect reduces.The design of conventional activated sludge process, the activated sludge concentration of second pond is according to the standard design of 3000-4000mg/l, its major cause is that the solid flux in order to ensure second pond meets design requirements, the active sludge of avoiding occurring entering second pond is too much, and causes the situation of second pond effluent characteristics decline situation.
Popular MBR(Membrane Bio-Reactor now) technique, also claim membrane bioreactor.This technique, by adopting ultra-filtration membrane, is tackled active sludge in biochemistry pool completely, thereby improves the activated sludge concentration of biochemistry pool, improves the processing efficiency of active sludge.
But above-mentioned technique subject matter is, the investment of film and operation expense are all higher, thereby inevitably make sewage disposal expense raise.Therefore, be necessary to seek a kind of new technique, in raising biochemistry pool, in activated sludge concentration, avoid the raising of construction costs and running cost as far as possible.
Utility model content
(1) technical problem that will solve
The technical problems to be solved in the utility model is: in conventional activated sludge technique, if improve the activated sludge concentration of biochemistry pool, the active mud content that must cause entering second pond is excessive, causes the effluent characteristics of second pond to decline; If reduce the activated sludge concentration that enters second pond, to ensure effluent characteristics, must need the mode by reducing biochemistry pool activated sludge concentration to realize, this will cause again the interior activated sludge loading of biochemistry pool higher, and wastewater treatment efficiency reduces.
(2) technical scheme
In order to solve the problems of the technologies described above, the utility model provides a kind of active sludge waste disposal plant, comprise biochemistry pool and second pond, the outlet of described biochemistry pool is communicated with the entrance of second pond, the active sludge outlet of described second pond is communicated with the entrance of biochemistry pool, described biochemistry pool inside is provided with successively along drainage flow direction: anaerobic zone, oxygen-starved area, aerobic zone, internal precipitate district and rear aerobic zone, described anaerobic zone is communicated with the entrance of biochemistry pool, and described rear aerobic zone is communicated with the outlet of described biochemistry pool.
Wherein, described internal precipitate district comprises settling region and active sludge collecting region, in described settling region, be provided with active sludge collection tube, the end of described active sludge collection tube is communicated with active sludge collecting region, for the active sludge in internal precipitate district is collected in active sludge collecting region.
Wherein, described active sludge is provided with reflux pump in collecting region, and described reflux pump is communicated with anaerobic zone and oxygen-starved area respectively by pipeline, sends anaerobic zone and/or oxygen-starved area back to for the active sludge that internal precipitate district is collected.
Wherein, on the pipeline of described reflux pump connection anaerobic zone, be also provided with recycle control valve.
Wherein, the forward and backward side of described settling region is respectively arranged with prosopyle, settling region and settling region posticum.
Wherein, described aerobic zone, He Hou aerobic zone, internal precipitate district are all connected with aerating apparatus, connect on the pipeline of described aerating apparatus and are equipped with control valve, and the control valve of described internal precipitate district aerating apparatus is in closing condition.
(3) beneficial effect
Technique scheme tool has the following advantages: by the mode of He Hou aerobic zone, internal precipitate district is set behind the aerobic zone of biochemistry pool, the active sludge content in biochemistry pool is improved, biochemistry pool clean effect is good; The activated sludge concentration that enters second pond is less, and the sedimentation effect of second pond is good; The activated sludge concentration that enters second pond is lower, and the active mud content that second pond refluxes is less, has reduced the destruction of the active sludge refluxing to biochemistry pool anaerobic zone anaerobic environment, has strengthened the dephosphorization ability of system.Activated sludge concentration after improving in the biochemistry pool of device is 2-4 times of conventional activated sludge concentration, has greatly improved the processing power of biochemistry pool.Internal precipitate plot structure is simple, can in original biochemistry pool, directly construct, and without destroying original biochemistry pool, builds construction cost lower, and maintenance cost is low.
Brief description of the drawings
Fig. 1 is the plan structure schematic diagram of the utility model active sludge waste disposal plant;
Fig. 2 is the side-view of the utility model settling region water inlet direction;
Fig. 3 is the side-view of the utility model settling region water outlet direction.
Wherein, 1, anaerobic zone; 2, recycle control valve; 3, oxygen-starved area; 4, aerobic zone; 5, settling region; 6, active sludge collecting region; 7, reflux pump; 8, rear aerobic zone; 9, second pond; 10, active sludge collection tube; 11, prosopyle, settling region; 12, settling region posticum.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.Following examples are used for illustrating the utility model, but are not used for limiting scope of the present utility model.
For ease of describing, carry out as given a definition:
Internal reflux: the mud that internal precipitate district collects is sent the process of anaerobic zone 1 or oxygen-starved area 3 back to by reflux pump 7;
External reflux: the active sludge in second pond 9 returns to the process of anaerobic zone 1.
Shown in Fig. 1, be the structural representation of the utility model active sludge waste disposal plant, wherein arrow represents the backflow direction of the active sludge in drainage flow direction and active sludge collecting region 6, second pond 9.This waste disposal plant comprises biochemistry pool and second pond 9, the active sludge treatment of sewage in biochemistry pool, and absorption is fallen after the pollutent in sewage, enters second pond 9 and precipitates.Clear water after precipitation is discharged by the posticum of second pond 9, and the active sludge precipitating returns to biochemistry pool by the active sludge outlet of second pond 9.Wherein biochemistry pool inside is disposed with anaerobic zone 1, oxygen-starved area 3, aerobic zone 4, internal precipitate district 5 and rear aerobic zone 8 along drainage flow direction, and the active sludge that second pond 9 returns enters in biochemistry pool through anaerobic zone 1.Internal precipitate district comprises settling region 5 and active sludge collecting region 6, is provided with some active sludge collection tubes 10 in settling region 5, and the end of active sludge collection tube 10 is communicated with active sludge collecting region 6; Active sludge collection tube 10 is provided with collection hole, and active sludge collection tube 10 collects by collection hole the active sludge precipitating, and delivers to active sludge collecting region 6.In active sludge collecting region 6, be provided with reflux pump 7, reflux pump 7 is communicated with anaerobic zone 1 and the oxygen-starved area 3 of biochemistry pool respectively by pipeline, and the active sludge that collect reflux pump 7 active sludge collecting regions 6 is transported to anaerobic zone 1 and oxygen-starved area 3; On pipeline between reflux pump 7 and anaerobic zone 1, be also provided with recycle control valve 2, can control as required the active sludge allocation proportion that flows into anaerobic zone 1, the demand with adaptive system to denitrogenation and dephosphorization.Sewage from internal precipitate district out, through after aerobic zone 8 flow into second pond 9 after processing.
The schematic cross-section that is respectively settling region 5 influent sides and water outlet side shown in Fig. 2 and Fig. 3, influent side is provided with prosopyle, settling region 11, and sewage enters settling region 5 by prosopyle, settling region 11; Water outlet side is provided with settling region posticum 12, and in settling region, 5 oettIed sewages are discharged from settling region posticum 12, enters rear aerobic zone 8.Active sludge collection tube 10 in settling region 5, by the unsettled bottom that is fixed on settling region 5 of fixed support device of bottom, makes the bottom of active sludge collection tube 10 also can collect active sludge.
Aerobic zone 4 in biochemistry pool, He Hou aerobic zone, internal precipitate district 8 are all connected with aerating apparatus in addition, are all provided with control valve on the pipeline of each aerating apparatus, can, according to reaction requirement, carry out at any time aeration.The aeration control valve of aerobic zone 4 and rear aerobic zone 8 is often opened; The aeration valve in internal precipitate district is normally closed, in the time being necessary to move with traditional technology condition, can carry out aeration to inner settling region, and the production technique of biochemistry pool and existing production technique are reached unanimity.
Settling region posticum 12 can be selected the mode draining of flooding posticum as shown in Figure 3, and it is long lateral opening that the shape of posticum is preferably rectangle, to extend effluent weir width, slows down water flow velocity, improves outlet effect; When the water level in settling region is during higher than settling region posticum 12, aerobic zones 8 after sewage just can flow into by settling region posticum 12; Structure that can certainly the straight weir of selection level realizes drain function, and the straight weir of level arranges a horizontal baffle at water outlet side exactly, and the water of settling region 5 is from horizontal baffle top flows in aerobic zone 8.No matter adopt which kind of structure, stop throw out as long as can realize, and realize drain function.The setting in internal precipitate district can be relatively simple and easy, do not pursue high-quality effluent quality, as long as can ensure, a large amount of active sludge is retained down, thereby this settling region 5 can adopt higher active sludge layer height, thereby this settling region 5 can adopt the shorter residence time, is preferably 1-2 hour.
The internal precipitate plot structure of this structure is simple, does not need to carry out special maintenance, and maintenance cost is low.Though be in newly constructed facility or reconstruction, enlarging facility in, its setting and construction all very convenient, can directly in original biochemistry pool, construct.
Through concentrating of internal precipitate district, can improve activated sludge concentration, improve internal reflux efficiency; Because internal precipitate district has the anoxic process of certain hour, make the denitrogenation of internal reflux and phosphor-removing effect be better than traditional AAO technique (anaerobic-anoxic-oxic method).
The setting of rear aerobic zone 8 is for the active sludge to overflowing from internal precipitate district continues aeration, avoids the active sludge anoxic time to cause anaerobic phosphorus release or active sludge rising phenomenon occurs in second pond 9 compared with length; The residence time of rear aerobic zone 8 is preferably 0.5-1 hour.
By the active sludge in inner settling region is refluxed, and quantity of reflux is controlled, can be controlled the active sludge spillage in internal precipitate district; Can increase substantially the activated sludge concentration of front anaerobic zone 1, settling region 5, oxygen-starved area 3 and aerobic zone 4, improve the comprehensive treatment capability of biochemical system; In ensureing activated sludge concentration higher in biochemistry pool, ensure that the active mud content that enters second pond 9 can be controlled in lower scope; A large amount of active sludge is all trapped within internal precipitate district, and the active mud content that flows into second pond 9 only has a little part.
Below with the example that transform as of certain municipal wastewater treatment facility AAO technique.The sewage treatment capacity of existing facility is 80,000 tons/day, ten thousand tons/day of existing dilatations to 12.In former technological design, the total residence time of sewage in biochemistry pool is 18 hours, and wherein anaerobism and anoxic total ascent time are 6 hours, and aerobic time is 12 hours, and biochemistry pool activated sludge concentration is 4000mg/l, and second pond 9 design surface loads are 1m3/m2h.Now intend improving ten thousand tons of day processing water yields to 12.Keeping former biochemistry pool to hold under constant prerequisite, the total residence time in biochemistry pool is reduced to 12 hours, and wherein anaerobism and the anoxic residence time are 4 hours, and the aerobic residence time is 8 hours; If do not improve activated sludge concentration, activated sludge loading is increased to original 1.5 times, not up to standard very risky of water outlet.
The treatment process that adopts the utility model to announce to this improvement project, aerobic zone 8 after aerobic zone 4 ends are established the internal precipitate district of 1.5 hours and 0.5 hour, settling region 5 front ends also have high density anaerobism, the high density aerobic zone 4 of 3 and 6 hours, oxygen-starved area of 4 hours.Only taking aerobic zone 4 as example, although that the residence time shortens to is original 1/2, if activated sludge concentration is brought up to 8000mg/l, activated sludge concentration is increased to original 2 times, makes generally activated sludge loading suitable with former technique; Meanwhile, because the activated sludge concentration of anaerobic zone 1 and oxygen-starved area 3 also increases considerably, the treatment effect of anaerobism and anoxic, is also greatly improved, so comprehensive treatment effect is better than former technique.And this technique is passed through the effect in internal precipitate district, the amplitude that activated sludge concentration improves, and more than 2 times; It is original more than 3 times that practice shows can to reach completely.Thereby the processing power of biochemical system, on the basis of former technique, also has by a larger margin and promotes.So, to hold constant in the situation that in biochemistry pool entirety pond, the technique that biochemistry pool is announced according to the utility model is carried out appropriate reconstruction, not only can ensure treatment effect, even also can obtain than the better effect of former technique.
The settling region 5 of the present embodiment adopts the perforation water inlet of one-sided pool wall middle part, and on offside pool wall, the mode water outlet of elongated straight effluent weir or aperture, underwater submerge discharging flow, also can adopt the water-out manners such as V-notch weir, and the facilities such as skimming plate needn't be set.Bottom returnedactivatedsludge collection tube 10 adopts perforated pipe to collect.Reflux pump 7 utilizes existing internal reflux pump 7, build in internal precipitate district one separately sealing every pond, as active sludge collecting region 6; The active sludge that hole pipe is collected causes in active sludge collecting region 6, utilizes reflux pump 7 to send anaerobic zone 1 back to.Because the activated sludge concentration in biochemistry pool is higher, the processing power of the aerobic zone 4 in 5 fronts, settling region is also greatly improved; Active sludge in anaerobic environment, can think that internal precipitate district also possesses the function of certain anoxic denitrification in internal precipitate district.Simultaneously, the active sludge that internal precipitate district collects has the sludge concentration higher than aeration mixed solution, activity sludge reflux is to anaerobic zone 1 and oxygen-starved area 2, both can suitably reduce concentration, reduce again the oxygen level in returned sluge, not only save energy consumption, also can make denitrification effect be better than traditional activated sludge process at present.
For second pond 9, hold under constant prerequisite in pond, its hydraulic load is increased to 1.5 times of former technique, reaches 1.5m3/m2h; But because the active sludge solid flux that enters second pond 9 can be controlled at lower level, thereby can ensure that outlet effect is unaffected.It is 4000mg/l that original design second pond 9 enters mud concentration, according to solid flux principle, for ensureing equal sedimentation effect, as long as controlling the concentration of overflowing active sludge in internal precipitate district is no more than 2600mg/l(design and enters 2/3 of second pond 9 activated sludge concentrations, under the effect in internal precipitate district, the sludge concentration that enters second pond 9 can also further reduce), can reach equal service requirements.
The active sludge that enters on a small quantity second pond 9 can, by the active sludge outlet of second pond 9, be back to biochemistry pool anaerobic zone 1, uses mainly as the anaerobic activated sludge of biochemical dephosphorization; Part active sludge in second pond 9, by residual active sludge pump, drains into outside system.Because the active sludge of second pond 9 is less, so quantity of reflux is smaller, thereby can reduce the overall flooding quantity of second pond 9, thereby contribute to improve the sedimentation effect of second pond 9; The quantity of reflux that is back to anaerobic zone 1 from second pond 9 is little, and this part water yield is destroyed less to the anaerobic environment of biochemistry pool anaerobic zone 1, thus can strengthen anaerobic zone 1 release phosphorus effect, contribute to the raising of the dephosphorization ability of system.
As can be seen from the above embodiments, the utility model arranges He Hou aerobic zone, internal precipitate district 8 by adopting behind the aerobic zone 4 of existing biochemistry pool, and the active sludge that settling region 5 is collected is back to anaerobic zone 1 or oxygen-starved area 3 by reflux pump 7, guarantee that the active sludge content in biochemistry pool remains on higher range; Do not changing under the prerequisite of original biochemistry pool pond appearance, improving the processing power of biochemistry pool.The activated sludge concentration that the setting in internal precipitate district also causes entering second pond 9 is lower, and the sedimentation effect of second pond 9 significantly improves.The active mud content that second pond 9 returns to biochemistry pool anaerobic zone 1 greatly reduces, and the active sludge returning is less on the anaerobic environment impact of anaerobic zone 1, and that has improved anaerobic zone 1 releases phosphorus effect.Relatively the active sludge after precipitation is collected active sludge collecting region 6 by the internal precipitate district of anoxic, then sends anaerobic zone 1 or the oxygen-starved area 3 of biochemistry pool back to by reflux pump 7; This process can make active sludge further concentrated, and the activated sludge concentration that makes to be back to anaerobic zone 1 or oxygen-starved area 3 is higher, and backflow efficiency is high; And internal precipitate district is the environment of a relatively hypoxia, make active sludge obtain an anoxic process, improve denitrogenation and the phosphor-removing effect of active sludge.The internal precipitate plot structure of this structure is simple, not destroying on the basis of original biochemistry pool, can directly construct, and construction cost is lower, is convenient to extensively promote the use of.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model know-why; can also make some improvement and replacement, these improvement and replacement also should be considered as protection domain of the present utility model.
Claims (6)
1. an active sludge waste disposal plant, comprise biochemistry pool and second pond, the outlet of described biochemistry pool is communicated with the entrance of second pond, the active sludge outlet of described second pond is communicated with the entrance of biochemistry pool, it is characterized in that, described biochemistry pool inside is provided with successively along drainage flow direction: anaerobic zone, oxygen-starved area, aerobic zone, internal precipitate district and rear aerobic zone, and described anaerobic zone is communicated with the entrance of biochemistry pool, and described rear aerobic zone is communicated with the outlet of described biochemistry pool.
2. active sludge waste disposal plant as claimed in claim 1, it is characterized in that, described internal precipitate district comprises settling region and active sludge collecting region, in described settling region, be provided with active sludge collection tube, the end of described active sludge collection tube is communicated with active sludge collecting region, for the active sludge in internal precipitate district is collected in active sludge collecting region.
3. active sludge waste disposal plant as claimed in claim 2, it is characterized in that, described active sludge is provided with reflux pump in collecting region, described reflux pump is communicated with anaerobic zone and oxygen-starved area respectively by pipeline, sends anaerobic zone and/or oxygen-starved area back to for the active sludge that internal precipitate district is collected.
4. active sludge waste disposal plant as claimed in claim 3, is characterized in that, on the pipeline of described reflux pump connection anaerobic zone, is also provided with recycle control valve.
5. active sludge waste disposal plant as claimed in claim 2, is characterized in that, the forward and backward side of described settling region is respectively arranged with prosopyle, settling region and settling region posticum.
6. active sludge waste disposal plant as claimed in claim 2, it is characterized in that, described aerobic zone, He Hou aerobic zone, internal precipitate district are all connected with aerating apparatus, connect on the pipeline of described aerating apparatus and be equipped with control valve, the control valve of described internal precipitate district aerating apparatus is in closing condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420103754.5U CN203741119U (en) | 2014-03-07 | 2014-03-07 | Activated sludge sewage treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420103754.5U CN203741119U (en) | 2014-03-07 | 2014-03-07 | Activated sludge sewage treatment device |
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| Publication Number | Publication Date |
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| CN203741119U true CN203741119U (en) | 2014-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420103754.5U Withdrawn - After Issue CN203741119U (en) | 2014-03-07 | 2014-03-07 | Activated sludge sewage treatment device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103833135A (en) * | 2014-03-07 | 2014-06-04 | 浦华环保有限公司 | Activated sludge wastewater treatment device and wastewater treatment technology |
| CN115140841A (en) * | 2022-05-24 | 2022-10-04 | 湖南五方环境科技研究院有限公司 | System and method for regulating and controlling sludge concentration of composite bioreactor |
-
2014
- 2014-03-07 CN CN201420103754.5U patent/CN203741119U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103833135A (en) * | 2014-03-07 | 2014-06-04 | 浦华环保有限公司 | Activated sludge wastewater treatment device and wastewater treatment technology |
| CN103833135B (en) * | 2014-03-07 | 2016-07-06 | 浦华环保股份有限公司 | Activated sludge sewage-treatment plant and sewage treatment process |
| CN115140841A (en) * | 2022-05-24 | 2022-10-04 | 湖南五方环境科技研究院有限公司 | System and method for regulating and controlling sludge concentration of composite bioreactor |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20140730 Effective date of abandoning: 20160706 |
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