CN110981128A - Method for building wetland through sludge backfill - Google Patents
Method for building wetland through sludge backfill Download PDFInfo
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- CN110981128A CN110981128A CN201911203760.1A CN201911203760A CN110981128A CN 110981128 A CN110981128 A CN 110981128A CN 201911203760 A CN201911203760 A CN 201911203760A CN 110981128 A CN110981128 A CN 110981128A
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- filter
- baffle
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- 239000010802 sludge Substances 0.000 title claims abstract description 127
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000001914 filtration Methods 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 18
- 230000000694 effects Effects 0.000 claims abstract description 17
- 239000012535 impurity Substances 0.000 claims description 36
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical group [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 30
- 230000007246 mechanism Effects 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 18
- 239000004927 clay Substances 0.000 claims description 18
- 239000010881 fly ash Substances 0.000 claims description 18
- 235000012255 calcium oxide Nutrition 0.000 claims description 15
- 239000000292 calcium oxide Substances 0.000 claims description 15
- 244000052616 bacterial pathogen Species 0.000 claims description 5
- 150000004679 hydroxides Chemical class 0.000 claims description 4
- 239000002244 precipitate Substances 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 5
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 238000001723 curing Methods 0.000 description 14
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 229910052793 cadmium Inorganic materials 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 229910052745 lead Inorganic materials 0.000 description 3
- 239000011133 lead Substances 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 241000143060 Americamysis bahia Species 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
-
- 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
- C02F11/008—Sludge treatment by fixation or solidification
-
- 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
- C02F11/02—Biological treatment
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/18—Reclamation of land from water or marshes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
Abstract
The invention relates to the technical field of dredging, in particular to a method for backfilling constructed wetland by sludge, which comprises the following steps: step 1: digging sludge; step 2: filtering the sludge; and step 3: passivating the heavy metals; and 4, step 4: solidifying the sludge; and 5: building a cofferdam; step 6: backfilling the sludge; and 7: and (4) planting the plants. The method has the effects of improving the ecological environment of the lake and improving the water quality by planting plants on the sludge after backfilling the sludge, so that the ecological balance is realized, the lake is self-regulated, the sludge does not need to be treated regularly, and the manpower and material resources are saved.
Description
Technical Field
The invention relates to the technical field of dredging, in particular to a method for backfilling constructed wetland by sludge.
Background
The sludge is fine soil which is deposited in still water and slow running water and contains organic matters, when the sludge in the lake is excessive, organic matters are increased, and are decomposed by bacteria, the oxygen consumption is increased, the pond water is easy to lack oxygen, and anoxic fishes and shrimps die, so that ecological damage and water quality deterioration are caused.
However, after the dredging treatment, the sludge is deposited at the river bottom after a period of time, and the sludge needs to be treated regularly, so that a lot of manpower and material resources are invested.
Disclosure of Invention
The invention aims to provide a method for building a wetland by backfilling sludge, which improves the ecological environment of a lake and improves the water quality by planting plants on the sludge after the sludge is backfilled, thereby realizing ecological balance, enabling the lake to be self-regulated, avoiding the need of periodically treating the sludge and saving manpower and material resources.
The above object of the present invention is achieved by the following technical solutions:
a method for backfilling constructed wetland by sludge comprises the following steps:
step 1: digging sludge, namely digging the sludge out of the lake by using dredging equipment, and placing the sludge on a bank;
step 2: filtering the sludge, namely feeding the sludge into a filtering device for filtering, and separating large solid impurities from the sludge through filtering;
and step 3: passivating heavy metals, namely adding a passivating agent into the sludge to improve the pH value of the sludge, so that the heavy metals are converted into precipitates such as hydroxides and the like, and the effects of passivating the heavy metals and killing pathogenic bacteria are achieved;
and 4, step 4: curing the sludge, namely adding a curing agent into the sludge to quickly cure the sludge;
and 5: building a cofferdam, building the cofferdam at the edge of the lake according to the terrain, and pumping water in the cofferdam;
step 6: backfilling the sludge, namely backfilling the solidified sludge into the cofferdam, and filling the solidified sludge into a mud flat and a shoal;
and 7: planting plants, namely planting aquatic plants on the mudflats and the shoals.
By adopting the technical scheme, the ecological environment of the lake is improved and the water quality is improved by planting plants on the silt after the silt is backfilled, so that ecological balance is realized, the lake is self-regulated, the silt does not need to be treated periodically, and manpower and material resources are saved.
The invention is further configured to: the dredging device is a dredging ship.
Through adopting above-mentioned technical scheme, the desilting ship is convenient desilting in the lake, can improve desilting efficiency.
The invention is further configured to: the filter device comprises a filter hopper, a plurality of supporting legs and a filter screen, wherein the filter hopper is a funnel, the supporting legs are fixedly arranged on the filter hopper, the filter hopper is fixedly arranged on the ground, the filter screen is fixedly arranged in the filter hopper, a impurity removing port is formed in the filter hopper above the filter screen, and the impurity removing port is formed in one inner wall of the filter hopper.
Through adopting above-mentioned technical scheme, filter and fight and be used for filtering silt, filter out the large-scale debris in the silt, guarantee not have large-scale debris in the silt, promoted the quality of silt, guarantee the quality of the silt of backfilling.
The invention is further configured to: impurity removal mouth department has set firmly the baffle, the baffle articulates in impurity removal mouth department, has set firmly latch mechanism between impurity removal mouth and the filtration mouth, latch mechanism control baffle is fixed and is rotated.
Through adopting above-mentioned technical scheme, the baffle plays and blocks the effect, can block silt and spill from removing miscellaneous mouthful when silt filters, guarantees filterable effect.
The invention is further configured to: the clamping mechanism comprises a rotating shaft, a rotating plate, a clamping groove and a clamping block, the rotating shaft is fixedly arranged on the filter hopper, one end of the rotating plate is rotatably arranged on the rotating shaft, the clamping groove is formed in one side, far away from the rotating shaft, of the rotating plate, the clamping block is fixedly arranged on the baffle, and the clamping block is clamped in the clamping groove.
Through adopting above-mentioned technical scheme, clamping mechanism is used for restricting the rotation of baffle, rotates when changeing the board to the fixture block joint in the draw-in groove, and the baffle is fixed unable rotation, rotates when changeing the board and breaks away from the draw-in groove to the fixture block, and the baffle is rotatable to be opened.
The invention is further configured to: two groups of clamping mechanisms are arranged on two sides of the baffle respectively.
Through adopting above-mentioned technical scheme, two sets of latch mechanisms set up respectively in the both sides of baffle, make latch mechanism's fixed action more strengthen, and silt can not spill from removing miscellaneous mouthful when guaranteeing to filter.
The invention is further configured to: the filter hopper is provided with a scraper which is arranged in the filter hopper and is abutted against the filter screen, and the scraper slides towards the direction close to or far away from the impurity removing opening.
By adopting the technical scheme, the scraper plate pushes sundries on the filter screen to move towards the sundry removing opening, and the sundries are discharged out of the filter hopper from the sundry removing opening, so that the subsequent filtering efficiency is ensured.
The invention is further configured to: the passivating agent is quicklime, fly ash, clay or the combination of the quicklime, the fly ash and the clay.
By adopting the technical scheme, the quick lime, the fly ash and the clay passivator are beneficial to conversion of Cr and Cd to a stable form, wherein the fly ash has the most obvious promotion effect on conversion of Cr to the stable form, and the clay has the strongest stabilizing effect on Cd; quicklime can promote the stabilization of Pb and Zn, and fly ash and clay have opposite effects; the fly ash has a promoting effect on Ni, and if quicklime and clay are not the same, proper amounts of different passivators are added according to analysis of the condition of the on-site sludge, so that heavy metal pollution in the sludge tends to be stable, and the heavy metal pollution in the sludge is solved.
In conclusion, the beneficial technical effects of the invention are as follows:
plants are planted on the silt after the silt is backfilled, so that the ecological environment of the lake is improved, the water quality is improved, the ecological balance is realized, the lake is self-regulated, the silt does not need to be treated regularly, and the manpower and material resources are saved;
the filtering hopper is used for filtering the sludge and filtering out large impurities in the sludge, so that the sludge is ensured not to have the large impurities, the quality of the sludge is improved, and the quality of the backfilled sludge is ensured;
the baffle plays a role in blocking, so that the sludge can be prevented from leaking out of the impurity removing opening during sludge filtration, and the filtration effect is ensured;
the clamping mechanism is used for limiting the rotation of the baffle plate, when the rotating plate rotates until the clamping block is clamped in the clamping groove, the baffle plate is fixed and cannot rotate, and when the rotating plate rotates until the clamping block is separated from the clamping groove, the baffle plate can rotate to open;
the scraper plate pushes sundries on the filter screen to move towards the sundry removing opening, and the sundries are discharged out of the filter hopper from the sundry removing opening, so that the subsequent filtering efficiency is ensured;
the three passivators of quicklime, fly ash and clay are beneficial to the conversion of Cr and Cd to a stable form, wherein the fly ash has the most obvious promotion effect on the conversion of Cr to the stable form, and the clay has the strongest stabilizing effect on Cd; quicklime can promote the stabilization of Pb and Zn, and fly ash and clay have opposite effects; the fly ash has a promoting effect on Ni, and if quicklime and clay are not the same, proper amounts of different passivators are added according to analysis of the condition of the on-site sludge, so that heavy metal pollution in the sludge tends to be stable, and the heavy metal pollution in the sludge is solved.
Drawings
FIG. 1 is a block flow diagram of the present invention.
Fig. 2 is a schematic view of the structure of the filter device of the present invention.
Fig. 3 is a partially enlarged schematic view of a portion a in fig. 2.
In the figure, 1, a filter hopper; 2. supporting legs; 3. a filter screen; 4. removing impurities; 5. a baffle plate; 6. a clamping mechanism; 601. a rotating shaft; 602. rotating the plate; 603. a card slot; 604. a clamping block; 7. a scraper.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the method for backfilling constructed wetland by sludge disclosed by the invention comprises the following steps:
step 1: digging sludge, namely digging the sludge out of the lake by using dredging equipment, and placing the sludge on a bank;
step 2: filtering the sludge, namely feeding the sludge into a filtering device for filtering, and separating large solid impurities from the sludge through filtering;
and step 3: passivating heavy metals, namely adding a passivating agent into the sludge to improve the pH value of the sludge, so that the heavy metals are converted into precipitates such as hydroxides and the like, and the effects of passivating the heavy metals and killing pathogenic bacteria are achieved;
and 4, step 4: curing the sludge, namely adding a curing agent into the sludge to quickly cure the sludge;
and 5: building a cofferdam, building the cofferdam at the edge of the lake according to the terrain, and pumping out water in the cofferdam;
step 6: backfilling the sludge, namely backfilling the solidified sludge into the cofferdam, and filling the solidified sludge into a mud flat and a shoal;
and 7: planting plants, namely planting aquatic plants on the mudflats and the shoals;
digging out sludge in the lake by digging sludge, filtering the sludge to filter and discharge large impurities in the sludge, adding a passivating agent, improving the pH value of the sludge, converting heavy metals into precipitates such as hydroxides and the like, and achieving the effects of passivating the heavy metals and killing pathogenic bacteria; adding a curing agent into the sludge to quickly cure the sludge, then building a cofferdam at the edge of the lake, filling the cured sludge into the cofferdam, compacting the sludge through flat rolling, and removing the surrounding bank to enable water to flow onto the sludge; and finally, planting aquatic plants on the backfilled sludge to construct a wetland ecological chain.
The dredging equipment is a dredging ship, and the dredging ship is a tool for removing underwater sediments. The power is generally diesel engine and motor. The hull, namely the floating body, adopts an assembled box type structure. The power drives the dredging device to remove underwater sediments, and the underwater sediments are sent to a specified position by the conveying device, so that the device has the function of efficient dredging.
Referring to fig. 2 and 3, the filtering device comprises a filter hopper 1, four supporting legs 2 fixedly arranged on the filter hopper 1 and a filter screen 3 fixedly arranged in the filter hopper 1, the filter hopper 1 is a funnel, the four supporting legs 2 are respectively arranged around the filter hopper 1, the filter hopper 1 is fixedly arranged on the ground by the supporting legs 2, a impurity removing opening 4 is formed in the filter screen 3 of the filter hopper 1, the impurity removing opening 4 is formed in one inner wall of the filter hopper 1, sludge is poured into the filter hopper 1 from one end of the filter hopper 1, and large impurities are discharged from the impurity removing opening 4 by filtering through the filter screen 3, so that the large impurities are not contained in the sludge, the quality of the sludge is improved, the quality of the backfilled sludge is ensured, and the ecological restoration capability of a subsequent wetland ecosystem is improved; the impurity removing port 4 is fixedly provided with a baffle 5, the baffle 5 is hinged at the impurity removing port 4, the baffle 5 plays a role of blocking, and when sludge is filtered, the sludge can be prevented from leaking out of the impurity removing port 4, so that the filtering effect is ensured; a clamping mechanism 6 is fixedly arranged between the impurity removing port 4 and the filtering port, the clamping mechanism 6 controls the fixing and rotation of the baffle 5, the clamping mechanism 6 comprises a rotating shaft 601 fixedly arranged on the filtering hopper 1, a rotating plate 602 with one end rotatably arranged on the rotating shaft 601, a clamping groove 603 arranged on one side of the rotating plate 602 far away from the rotating shaft 601 and a clamping block 604 fixedly arranged on the baffle 5, the clamping block 604 is clamped in the clamping groove 603, the clamping mechanism 6 is used for limiting the rotation of the baffle 5, when the rotating plate 602 rotates until the clamping block 604 is clamped in the clamping groove 603, the baffle 5 is fixed and can not rotate, when the rotating plate 602 rotates until the clamping block 604 is separated from the clamping groove 603, the baffle 5 can be rotated and opened; two groups of clamping mechanisms 6 are respectively arranged at two sides of the baffle 5, and the two groups of clamping mechanisms 6 are respectively arranged at two sides of the baffle 5, so that the fixing function of the clamping mechanisms 6 is enhanced, and the sludge can not leak out of the impurity removing port 4 during filtering; the filter hopper 1 is provided with a scraper 7, the scraper 7 is arranged in the filter hopper 1 and is abutted against the filter screen 3, the scraper 7 slides towards the direction close to or far away from the impurity removing opening 4, the scraper 7 pushes impurities on the filter screen 3 to move towards the impurity removing opening 4, and the impurities are discharged out of the filter hopper 1 from the impurity removing opening 4, so that the subsequent filtering efficiency is ensured; both sides of the scraper 7 are erected on the filter hopper 1, and the scraper 7 can slide and move more smoothly through the guide of the filter hopper 1.
The passivating agent is quicklime, fly ash, clay or the combination of two or even all of the quicklime, the fly ash and the clay; the three passivators of quicklime, fly ash and clay are beneficial to the conversion of Cr and Cd to a stable form, wherein the fly ash has the most obvious promotion effect on the conversion of Cr to the stable form, and the clay has the strongest stabilizing effect on Cd; quicklime can promote the stabilization of Pb and Zn, and fly ash and clay have opposite effects; the fly ash has a promoting effect on Ni, and if quicklime and clay are not the same, proper amounts of different passivators are added according to analysis of the condition of the on-site sludge, so that heavy metal pollution in the sludge tends to be stable, and the effects of solving the heavy metal pollution in the sludge and killing pathogenic bacteria are achieved.
The curing agent is a chemical mixture for accelerating the curing of the sludge, can accelerate the curing of the sludge, is described in many prior patents, for example, in the Chinese patent 'sludge curing agent and sludge curing method using the sludge curing agent' with the publication number of CN102557545B, the sludge curing agent is described, and the curing agent is the prior art and is not described in redundant detail.
The cofferdam is a temporary enclosure structure constructed for constructing permanent water conservancy facilities in the water conservancy project construction. The cofferdam is constructed to be higher than the water level of the lake, water in the cofferdam is pumped to be dry, and the cofferdam is beaten to be lower than the water level after the subsequently solidified sludge is backfilled, so that water can conveniently enter the wetland on the one hand, and soil loss of the wetland can be prevented for protecting the wetland on the other hand.
When the solidified sludge is backfilled, the solidified sludge needs to be filled into the cofferdam and compacted through flat rolling, and the height of the solidified sludge needs to be slightly lower than the water surface so as to form a mud flat and a shoal after the subsequent cofferdam is beaten to be lower than the horizontal plane; after the solidified sludge is backfilled, removing the cofferdam to enable water to flow to the solidified sludge to form a mud flat and a shoal; then planting emergent aquatic plants, submerged aquatic plants and the like on the mudflat and the shoal; and when necessary, the fry can be put in according to the requirements of the wetland.
The implementation principle of the embodiment is as follows: firstly digging out sludge in the lake through a dredging boat, filtering the sludge to filter and discharge large impurities in the sludge, and then adding a proper amount of passivating agent according to the content and components of metal pollution in the local sludge; adding a curing agent into the sludge to quickly cure the sludge, then building a cofferdam at the edge of the lake, filling the cured sludge into the cofferdam, compacting the sludge through flat rolling, and removing the surrounding bank to enable water to flow onto the sludge; and finally, planting aquatic plants on the backfilled sludge, beating the cofferdam to be lower than the water surface, constructing a wetland ecological chain, and putting fries in the lake if necessary to enable the ecological chain to be more diversified.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (8)
1. A method for backfilling constructed wetland by sludge comprises the following steps:
step 1: digging sludge, namely digging the sludge out of the lake by using dredging equipment, and placing the sludge on a bank;
step 2: filtering the sludge, namely feeding the sludge into a filtering device for filtering, and separating large solid impurities from the sludge through filtering;
and step 3: passivating heavy metals, namely adding a passivating agent into the sludge to improve the pH value of the sludge, so that the heavy metals are converted into precipitates such as hydroxides and the like, and the effects of passivating the heavy metals and killing pathogenic bacteria are achieved;
and 4, step 4: curing the sludge, namely adding a curing agent into the sludge to quickly cure the sludge;
and 5: building a cofferdam, building the cofferdam at the edge of the lake according to the terrain, and pumping water in the cofferdam;
step 6: backfilling the sludge, namely backfilling the solidified sludge into the cofferdam, and filling the solidified sludge into a mud flat and a shoal;
and 7: planting plants, namely planting aquatic plants on the mudflats and the shoals.
2. The method for backfilling constructed wetland with sludge according to claim 1, wherein the method comprises the following steps: the dredging device is a dredging ship.
3. The method for backfilling constructed wetland with sludge according to claim 1, wherein the method comprises the following steps: the filter device comprises a filter hopper (1), supporting legs (2) and a filter screen (3), wherein the filter hopper (1) is a funnel, the supporting legs (2) are plural, the supporting legs (2) are fixedly arranged on the filter hopper (1), the filter hopper (1) is fixedly arranged on the ground, the filter screen (3) is fixedly arranged in the filter hopper (1), a impurity removing opening (4) is formed in the filter hopper (1) above the filter screen (3), and the impurity removing opening (4) is formed in one of the inner walls of the filter hopper (1).
4. The method for backfilling constructed wetland with sludge according to claim 3, wherein the method comprises the following steps: the impurity removing port (4) is fixedly provided with a baffle (5), the baffle (5) is hinged at the impurity removing port (4), a clamping mechanism (6) is fixedly arranged between the impurity removing port (4) and the filtering port, and the clamping mechanism (6) controls the baffle (5) to be fixed and rotated.
5. The method for backfilling constructed wetland with sludge according to claim 4, wherein the method comprises the following steps: clamping mechanism (6) are including pivot (601), commentaries on classics board (602), draw-in groove (603) and fixture block (604), pivot (601) set firmly on filter hopper (1), commentaries on classics board (602) one end is rotated and is set up on pivot (601), draw-in groove (603) are seted up and are kept away from pivot (601) one side at commentaries on classics board (602), fixture block (604) set firmly on baffle (5), and fixture block (604) joint is in draw-in groove (603).
6. The method for backfilling constructed wetland with sludge according to claim 5, wherein the method comprises the following steps: two groups of clamping mechanisms (6) are arranged on two sides of the baffle (5) respectively.
7. The method for backfilling constructed wetland with sludge according to claim 3, wherein the method comprises the following steps: the filter hopper (1) is provided with a scraper (7), the scraper (7) is abutted against the filter screen (3) in the filter hopper (1), and the scraper (7) slides towards the direction close to or far away from the impurity removing opening (4).
8. The method for backfilling constructed wetland with sludge according to claim 1, wherein the method comprises the following steps: the passivating agent is quicklime, fly ash, clay or the combination of the quicklime, the fly ash and the clay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911203760.1A CN110981128A (en) | 2019-11-29 | 2019-11-29 | Method for building wetland through sludge backfill |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911203760.1A CN110981128A (en) | 2019-11-29 | 2019-11-29 | Method for building wetland through sludge backfill |
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| CN110981128A true CN110981128A (en) | 2020-04-10 |
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| CN201911203760.1A Pending CN110981128A (en) | 2019-11-29 | 2019-11-29 | Method for building wetland through sludge backfill |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111622173A (en) * | 2020-05-27 | 2020-09-04 | 山东省淮海工程建设监理有限公司 | Underwater cutter suction type dredging method for urban ecological river |
| CN111925083A (en) * | 2020-08-05 | 2020-11-13 | 兴源环境科技股份有限公司 | Dredged sludge solidification method |
| CN112429925A (en) * | 2020-11-12 | 2021-03-02 | 佛山市南海区苏科大环境研究院 | Digestion and solidification treatment method for organic pollutant-heavy metal polluted bottom mud |
| CN116062936A (en) * | 2023-01-11 | 2023-05-05 | 重庆大学 | Three-dimensional view constructed wetland |
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| CN112429925A (en) * | 2020-11-12 | 2021-03-02 | 佛山市南海区苏科大环境研究院 | Digestion and solidification treatment method for organic pollutant-heavy metal polluted bottom mud |
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