CN115043560A - Organic and inorganic separation device for return sludge - Google Patents
Organic and inorganic separation device for return sludge Download PDFInfo
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- CN115043560A CN115043560A CN202210697129.7A CN202210697129A CN115043560A CN 115043560 A CN115043560 A CN 115043560A CN 202210697129 A CN202210697129 A CN 202210697129A CN 115043560 A CN115043560 A CN 115043560A
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- 239000010802 sludge Substances 0.000 title claims abstract description 150
- 238000000926 separation method Methods 0.000 title claims abstract description 17
- 238000005192 partition Methods 0.000 claims abstract description 26
- 239000000126 substance Substances 0.000 claims abstract description 13
- 230000033001 locomotion Effects 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 13
- 230000014759 maintenance of location Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims 1
- 238000004062 sedimentation Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 11
- 239000003344 environmental pollutant Substances 0.000 abstract description 5
- 231100000719 pollutant Toxicity 0.000 abstract description 5
- 230000005484 gravity Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 abstract description 2
- 239000010865 sewage Substances 0.000 description 14
- 239000007787 solid Substances 0.000 description 9
- 230000006872 improvement Effects 0.000 description 7
- 244000005700 microbiome Species 0.000 description 7
- 230000007423 decrease Effects 0.000 description 5
- 230000007102 metabolic function Effects 0.000 description 4
- 230000000813 microbial effect Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000004060 metabolic process Effects 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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Classifications
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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
- C02F11/00—Treatment of sludge; Devices therefor
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses an organic and inorganic separation device for return sludge, which comprises a box body, wherein a sludge inlet distribution pipe and a sludge outlet channel are arranged on the box body, a plurality of partition plates are arranged in the box body at intervals, the box body is divided into a plurality of settling areas by the partition plates, a sludge discharge port is formed in the bottom of each settling area, a sludge passing channel is formed in each partition plate, and the sludge passing channels of adjacent partition plates are alternated in height. The device is used for distributing the return sludge of the secondary sedimentation tank to the sedimentation area, the return sludge does up-and-down reciprocating motion along the partition plate under the unpowered condition, and because the inorganic components in the return sludge have higher specific gravity than the organic components and are not easy to convey, the inorganic components are easier to naturally settle under the conditions of no stirring and no external power, the settled sludge is gathered at the bottom of the sedimentation area and is discharged through the sludge discharge port, and the problems of higher inorganic substance content, poor sludge activity and low pollutant removal efficiency in the return sludge are effectively solved. The device adopts whole integrated design, compact structure, and the installation is convenient, and the place requirement is not high.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to an organic-inorganic separation device for return sludge.
Background
The return sludge is separated from the secondary sedimentation (or sedimentation zone), and the active sludge returned to the biological section is essentially a microbial community, which is mainly a floc group formed by coagulation and interweaving of various microorganisms (including bacteria, filamentous bacteria, protozoa and micro metazoan) and organic and inorganic components in water. The organic components in the sludge are products for treating organic wastewater, are generally easy to corrode, have fine particles, small specific gravity, high initial water content, are not easy to dehydrate and are easy to convey by pipelines. The inorganic component in the sludge is a product of wastewater treatment by a physical and chemical method, is not easy to corrode, has coarse particles and large specific gravity, has low initial water content, is easy to dehydrate, but has poor fluidity, and is not easy to convey by a pipeline.
The activated sludge mainly comprises four parts: a microorganism population (Ma) with a metabolic function, residues (Me) of endogenous metabolism and autooxidation of microorganisms, inert organic substances (Mi) which are difficult to degrade in sewage and inorganic substances (Mii) in sewage. In the activated sludge operation process, due to the density difference between inorganic matters and organic matters in the activated sludge, the content of active microbial population in the sludge gradually decreases and the inorganic components gradually increase with the increase of the operation time, and the decrease of the active microbial population affects the removal efficiency of sewage, and within a certain total mass of activated sludge solids (MLSS), the sludge load is liable to decrease, and the sewage treatment efficiency is liable to decrease.
The existing sludge backflow mode of the secondary sedimentation tank is that a certain amount of sludge in the secondary sedimentation tank is directly pumped into a biochemical tank by a sludge backflow pump, and domestic backflow sludge generally has the condition of high inorganic substance content, so that the accumulation of inorganic substance components in the sludge in the biochemical tank is caused, the content of active microbial groups with metabolic functions is lower and lower, the sludge activity is poor, and the removal efficiency of the biochemical tank on pollutants is reduced.
Disclosure of Invention
The invention provides an organic-inorganic separation device for return sludge, aiming at the common conditions of high inorganic substance content, poor sludge activity, low pollutant removal efficiency and the like of the return sludge in China, and aiming at reducing the inorganic substance of the return sludge, improving the sludge activity and improving the pollutant removal efficiency.
The invention realizes the purpose through the following technical scheme:
the utility model provides an organic inorganic separator of backward flow mud, includes the box, the box end department of mutually opposing is equipped with into mud distributing pipe and goes out the mud canal respectively, and the inside interval of box is equipped with a plurality of baffles, the baffle separates the box for a plurality of settling zone, has all seted up row mud mouth in the bottom of every settling zone, all is equipped with the mud passageway on every baffle, and the mud passageway height of crossing of adjacent baffle sets up in turn for backward flow mud is the up-and-down back and forth movement along each settling zone.
The further improvement lies in that in the adjacent baffle, the mud passageway of crossing that is located the eminence is the clearance between baffle top and the box roof, and the mud hole is crossed for a plurality of that sets up some on the baffle to the mud passageway of crossing that is located the low department.
The further improvement is that the upper and lower width of the gap is 40-50 mm.
The further improvement lies in that the mud passing holes comprise 6-10 mud passing holes which are uniformly arranged along the horizontal direction and have the diameter of 1.0-1.5 cm, and the distance between the mud passing holes and the bottom wall of the box body is 60-80 mm.
The improved sludge distributor is characterized in that a sludge inlet at the outer end of the sludge inlet distributing pipe is connected with a sludge pump through a pipeline, a plurality of sludge inlet holes with the diameter of 0.5-0.8 cm are uniformly formed in the sludge inlet distributing pipe, and returned sludge passes through the sludge inlet holes in the sludge inlet distributing pipe and is uniformly distributed in a settling zone, so that the sludge in the device is uniformly distributed.
The further improvement lies in that the mud outlet channel is connected with the outer side wall of the end head of the box body, a mud passing hole is formed in the joint, and a mud outlet is formed in the bottom of the mud outlet channel and used for returning mud to the biochemical pool.
The further improvement lies in that the mud passing holes at the joint comprise 6-10 mud passing holes which are uniformly arranged along the horizontal direction and have the diameter of 1.0-1.5 cm, and the distance between the mud passing holes and the top wall of the box body is 50-60 mm.
The further improvement lies in that the sludge discharge port is connected with a sludge discharge pump through a pipeline, and the collected sludge is discharged to a sludge concentration tank under the action of the sludge discharge pump.
The improved sludge discharge device is characterized in that a liquid level sensor is arranged in the box body, and the liquid level sensor and the sludge discharge pump are in linkage control and used for controlling the sludge discharge pump to discharge sludge when the liquid level sensor detects that the height of the liquid level in the box body exceeds a preset value.
In a further improvement, the returned sludge organic-inorganic separation device is designed to: the retention time of the return sludge in the device is 20-30 min, and the specific time is determined according to the treatment scale and the content of inorganic matters in the return sludge. The retention time determines the treatment effect of the sewage to a certain extent, and if the retention time is too short, the removal effect of inorganic components in the returned sludge is not good enough; if the retention time is too long, on the one hand, the device is too large, and the cost is too high; on the other hand, the inorganic component in the return sludge has a too good removal effect, so that the sludge concentration is low and the sludge sedimentation is not facilitated.
The invention has the beneficial effects that:
the device distributes the return sludge of the secondary sedimentation tank to the sedimentation area, the return sludge does up-and-down reciprocating motion along the partition plate under the unpowered condition, and because the inorganic components in the return sludge have the characteristics of higher specific gravity than the organic components, difficult transportation and the like, the inorganic components are easier to naturally settle under the conditions of no stirring and no external power, the settled sludge is gathered at the bottom of the sedimentation area and is discharged through a sludge discharge port, and the problems of higher inorganic content, poor sludge activity and low pollutant removal efficiency in the return sludge are effectively solved.
The device adopts whole integrated design, compact structure, and the installation is convenient, and the place requirement is not high.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a schematic view of adjacent separator plates;
FIG. 4 is a schematic view of the flow direction of the return sludge in the apparatus;
in the figure: 1. a box body; 2. a mud inlet distribution pipe; 3. a mud outlet channel; 4. a partition plate; 5. a settling zone; 6. a sludge discharge port; 7. a mud passing channel; 8. a sludge inlet; 9. a sludge outlet; 10. a liquid level sensor.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Referring to fig. 1 to 4, the organic-inorganic separation device for the return sludge comprises a box body 1, wherein opposite ends of the box body 1 are respectively provided with a sludge inlet distribution pipe 2 and a sludge outlet channel 3, five partition plates 4 (the partition plates A-E are respectively marked from the right side to the left side in fig. 1) are arranged in the box body 1 at intervals, the box body 1 is divided into six sedimentation areas 5 by the partition plates 4, the bottom of each sedimentation area 5 is provided with a sludge discharge port 6, the sludge discharge port 6 is connected with a sludge discharge pump through a pipeline, each partition plate 4 is provided with a sludge passage 7, the sludge passage 7 of the adjacent partition plates 4 is alternately arranged in height, specifically, the sludge passage 7 of the partition plate B and the partition plate D is a gap between the top end of the partition plate and the top wall of the box body 1, the upper and lower width of the gap is 40-50 mm, the sludge passage 7 of the partition plate A, the partition plate C and the partition plate E is provided with a plurality of sludge passing holes on the partition plate 4, the mud passing holes comprise 6-10 mud passing holes which are uniformly arranged in the horizontal direction and have the diameter of 1.0-1.5 cm, and the distance between the mud passing holes and the bottom wall of the box body 1 is 60-80 mm.
The mud inlet 8 of the outer end of the mud inlet distribution pipe 2 is connected with a mud pump through a pipeline, a plurality of mud inlet holes with the diameter of 0.5-0.8 cm are evenly formed in the mud inlet distribution pipe 2, and return mud is evenly distributed to the settling zone 5 through the mud inlet holes in the mud inlet distribution pipe 2. Go out mud canal 3 and be connected with 1 end lateral wall of box, and seted up at the junction and crossed the mud hole, crossed the mud hole and included 6 ~ 10 diameters that evenly set up along the horizontal direction equally and be 1.0 ~ 1.5cm and crossed the mud hole and be 50 ~ 60mm apart from the distance of box roof. The bottom of the mud outlet channel 3 is provided with a mud outlet 9.
In addition, a liquid level sensor 10 is arranged in the box body 1, and the liquid level sensor 10 is in linkage control with the sludge discharge pump and used for controlling the sludge discharge pump to discharge sludge when the liquid level sensor 10 detects that the liquid level height in the box body 1 exceeds a preset value.
The organic and inorganic separation device for the return sludge is designed as follows: the retention time of the return sludge in the device is 20-30 min, the specific time is determined according to the treatment scale and the inorganic matter content in the return sludge, and the specific time is not more than 30 min.
Examples
The device related to the invention patent is set up in a laboratory, experimental sludge is taken from return sludge of a secondary sedimentation tank of a certain municipal sewage treatment plant, and the properties of the sludge are as shown in the table:
two heavy pond return sludge condition tables
| Index (I) | MLSS(g/L) | MLVSS(g/L) | f(％) |
| Numerical value | 8.670 | 5.175 | 59.7％ |
(Note: f ═ MLVSS/MLSS)
The returned sludge of the secondary sedimentation tank is conveyed into a sludge inlet distribution pipe of the device through a sludge pump and is distributed to a first sedimentation area through a water inlet distribution pipe, the returned sludge does up-and-down reciprocating motion along the partition plate under the unpowered condition, the sludge flows around the partition plate under the action of the partition plate, so that the total length of a flow path of the sludge flowing in the device is increased, and in addition, the blocking of the partition plate and the characteristics of larger proportion of inorganic components in the sludge than organic components, difficulty in conveying and the like are realized. The treated sludge is collected to a sludge discharge channel and flows to a biochemical pond through a sludge discharge port arranged below the sludge discharge channel.
Mixed Liquor Suspended Solids (MLSS), also called mixed liquor sludge concentration, represents the total weight of activated sludge solids contained in a unit volume of mixed liquor and is composed of four parts, a microorganism population (Ma) having a metabolic function, residues (Me) of endogenous metabolism and autooxidation of microorganisms, inert organic substances (Mi) in sewage which are difficult to degrade, and inorganic substances (Mii) in sewage.
The Mixed Liquor Volatile Suspended Solids (MLVSS) represent the concentration of organic solid matter in the mixed liquor activated sludge, and the mixed liquor volatile suspended solids are composed of a microorganism population (Ma) having metabolic function activity, a residue (Me) of microorganism endogenous metabolism autooxidation, and an inert organic matter (Mi) that is difficult to degrade in sewage. The ratio f value of MLVSS and MLSS can represent organic matters in sewage treatment, the larger the f value is, the higher the content of the organic matters in the solid matters in the sewage is, the higher the activity of the sludge is relatively, and the f value of general domestic sewage and urban sewage is about 0.75. The difference between Mixed Liquor Suspended Solids (MLSS) and Mixed Liquor Volatile Suspended Solids (MLVSS) is inorganic substances (Mii), and the f value is reduced and the sludge activity is deteriorated due to the fact that the content of the inorganic substances is too high.
The device continuously operates for 15 days, and the MLSS content and the MLVSS content in the treated return sludge are detected, wherein the specific conditions are shown in the following table:
from the table it follows: as the device operating time increases, both MLSS and MLVSS gradually decrease and the value of f gradually increases, with MLSS decreasing significantly faster than MLVSS. On day 12, f reached 74.5%, which then tended to stabilize and the sludge reached a better state and returned to the biochemical stage to aid in contaminant removal.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (10)
1. The utility model provides an organic inorganic separator of backward flow mud, includes box (1), its characterized in that, box (1) end department that is just opposite is equipped with into mud distributing pipe (2) and goes out mud canal (3) respectively, and box (1) inside interval is equipped with a plurality of baffle (4), baffle (4) are separated box (1) for a plurality of settling zone (5), have all seted up mud discharging port (6) in the bottom of every settling zone (5), all are equipped with on every baffle (4) and cross mud passageway (7), and the mud passageway (7) height of crossing of adjacent baffle (4) sets up in turn for backward flow mud is round trip movement from top to bottom along each settling zone (5).
2. The organic and inorganic separation device for the return sludge according to claim 1, wherein in the adjacent partition plates (4), the sludge passage (7) at the high position is a gap between the top end of the partition plate (4) and the top wall of the tank body (1), and the sludge passage (7) at the low position is a plurality of sludge passing holes formed in the partition plate (4).
3. The organic-inorganic separation device for the returned sludge according to claim 2, wherein the upper and lower widths of the gap are 40-50 mm.
4. The organic and inorganic separation device for the return sludge according to claim 2, wherein the sludge passing holes comprise 6 to 10 sludge passing holes with the diameter of 1.0 to 1.5cm, which are uniformly arranged along the horizontal direction, and the distance between the sludge passing holes and the bottom wall of the box body (1) is 60 to 80 mm.
5. The organic and inorganic separation device for the returned sludge according to claim 1, wherein a sludge pump is connected to the sludge inlet (8) at the outer end of the sludge inlet distribution pipe (2) through a pipeline, a plurality of sludge inlet holes with the diameter of 0.5-0.8 cm are uniformly arranged on the sludge inlet distribution pipe (2), and the returned sludge is uniformly distributed into the settling zone (5) through the sludge inlet holes on the sludge inlet distribution pipe (2).
6. The organic and inorganic separation device for the returned sludge according to claim 1, wherein the sludge outlet channel (3) is connected with the outer side wall of the end of the box body (1), a sludge passing hole is formed at the joint, and a sludge outlet (9) is formed at the bottom of the sludge outlet channel (3).
7. The organic and inorganic separation device for the return sludge according to claim 6, wherein the sludge passing holes comprise 6 to 10 sludge passing holes with the diameter of 1.0 to 1.5cm, which are uniformly arranged along the horizontal direction, and the distance between the sludge passing holes and the top wall of the box body (1) is 50 to 60 mm.
8. The device for separating organic and inorganic substances in return sludge according to claim 1, wherein the sludge discharge port (6) is connected with a sludge discharge pump through a pipeline.
9. The organic and inorganic return sludge separation device according to claim 8, wherein a liquid level sensor (10) is arranged in the tank body (1), and the liquid level sensor (10) is in linkage control with the sludge discharge pump and is used for controlling the sludge discharge pump to discharge sludge when the liquid level sensor (10) detects that the liquid level in the tank body (1) exceeds a preset value.
10. The returned sludge organic-inorganic separation apparatus according to claim 1, wherein the returned sludge organic-inorganic separation apparatus is designed to: the retention time of the return sludge in the device is 20-30 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210697129.7A CN115043560A (en) | 2022-06-20 | 2022-06-20 | Organic and inorganic separation device for return sludge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210697129.7A CN115043560A (en) | 2022-06-20 | 2022-06-20 | Organic and inorganic separation device for return sludge |
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| CN115043560A true CN115043560A (en) | 2022-09-13 |
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| CN202210697129.7A Pending CN115043560A (en) | 2022-06-20 | 2022-06-20 | Organic and inorganic separation device for return sludge |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205710360U (en) * | 2016-02-18 | 2016-11-23 | 赵峰 | A kind of slag muddy water dual treatment device |
| CN206720825U (en) * | 2017-05-22 | 2017-12-08 | 安徽马钢工程技术集团有限公司 | A kind of gallery is vortexed flocculation tank |
| CN208717109U (en) * | 2018-08-09 | 2019-04-09 | 遵义师范学院 | The facility of separation of sediment and reservation organic carbon source from sewage |
| US20200338478A1 (en) * | 2019-04-26 | 2020-10-29 | Disco Corporation | Waste liquid treating apparatus |
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2022
- 2022-06-20 CN CN202210697129.7A patent/CN115043560A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205710360U (en) * | 2016-02-18 | 2016-11-23 | 赵峰 | A kind of slag muddy water dual treatment device |
| CN206720825U (en) * | 2017-05-22 | 2017-12-08 | 安徽马钢工程技术集团有限公司 | A kind of gallery is vortexed flocculation tank |
| CN208717109U (en) * | 2018-08-09 | 2019-04-09 | 遵义师范学院 | The facility of separation of sediment and reservation organic carbon source from sewage |
| US20200338478A1 (en) * | 2019-04-26 | 2020-10-29 | Disco Corporation | Waste liquid treating apparatus |
| CN111841143A (en) * | 2019-04-26 | 2020-10-30 | 株式会社迪思科 | Waste liquid treatment device |
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