CN107935357A - A kind of Dredged bed mud treatment in situ system and processing method - Google Patents
A kind of Dredged bed mud treatment in situ system and processing method Download PDFInfo
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- CN107935357A CN107935357A CN201711439693.4A CN201711439693A CN107935357A CN 107935357 A CN107935357 A CN 107935357A CN 201711439693 A CN201711439693 A CN 201711439693A CN 107935357 A CN107935357 A CN 107935357A
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- bed mud
- pond body
- mud
- dredged bed
- circuit cylinder
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Classifications
-
- 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
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
Abstract
The present invention relates to a kind of Dredged bed mud treatment in situ system and processing method, hollow circuit cylinder pond body including top, the bowl-type pond body being connected with the hollow circuit cylinder pond body lower part, it is arranged on the solid cylindrical of the hollow circuit cylinder pond body and bowl-type pool center, the bowl-type pond body is provided, in sequence from bottom to top, with water distribution drainage blanket, second purifying layer, first purifying layer, drainpipe is equipped with the water distribution drainage blanket, filter layer is provided, in sequence from bottom to top, with the hollow circuit cylinder pond body, sludge dewatering net, bottom-mud dewatering unit, vent stack is equipped with the solid cylindrical, the at least two ventilation transverse tubes being connected with the vent stack are equipped with first purifying layer.The present invention can reduce Dredged bed mud processing cost, avoid pollutants in sediments from causing secondary pollution, and be conducive to carry out recycling to bed mud.
Description
Technical field
The present invention relates to ecological environment field, more particularly to a kind of Dredged bed mud treatment in situ system and processing method,
Treatment in situ and landscape construction for river and lake desilting sediment.
Background technology
Since reform and opening-up, China city and park are quickly grown, therefore quantity of wastewater effluent also increases considerably, but I
State's environmental protection industry relatively lags behind compared to city and industrial expansion, and the construction of sewage treatment facility is also started late, this stagnant
Afterwards so that a large amount of sanitary sewages and industrial wastewater can not be effectively addressed in the past, it is directly discharged into river and lake, not only water degradation,
As accumulation of pollutants is in bed mud, physics, chemistry or the biotic component of riverbed sludge are all changed, and bed mud is contaminated
It is extremely serious, new endogenous pollution source is formd, peri-urban water environment is ultimately resulted in and heavy damage occurs.And the environmental protection of bed mud
Dredging is one of main means for solving the problems, such as water body endogenous pollution.
Riverbed sludge due to the difference of receiving pollutant kind, pollution type can substantially be divided into nitrogen and phosphorous nutrient pollution,
Heavy metal pollution, organic pollution and combined pollution are several.Currently for the processing of pollution riverbed sludge, China uses ring more
The conventional methods such as guarantor concentrates bed mud after dredging, digests, fills, compost, but the transfer of Dredged bed mud and subsequent treatment
Then need to spend larger transport, excavation and processing cost, in Dredged bed mud is sloughed in addition waste water and bed mud percolate often
Often contain substantial amounts of nitrogen and phosphorus pollutants, heavy metal contaminants and organic matter, such as cannot effectively handle will certainly cause secondary dirt
Dye, forms new environmental problem.
Disposal for Dredged bed mud, dehydration minimizing is premise, and innoxious is core, and recycling is then bed mud
The final goal of disposal.Dredged bed mud processing cost how is reduced, and is avoided that pollutants in sediments causes secondary pollution, moreover it is possible to is right
Bed mud carries out the problem urgently to be resolved hurrily that recycling is current ecological, environmental protective field.
The content of the invention
The purpose of the present invention is for the deficiency in terms of above-mentioned Dredged bed mud treatment technology, propose a kind of Dredged bed mud on the spot
Processing system and processing method, to reduce Dredged bed mud processing cost, avoid pollutants in sediments from causing secondary pollution, and finally have
Recycling is carried out beneficial to bed mud.
To achieve the above object, the present invention provides the hollow circle of a kind of Dredged bed mud treatment in situ system, including top
Column pond body, the bowl-type pond body being connected with the hollow circuit cylinder pond body lower part, be arranged on the hollow circuit cylinder pond body and bowl-type pond body
The solid cylindrical at center, the bowl-type pond body are provided, in sequence from bottom to top, with water distribution drainage blanket, the second purifying layer, the first purifying layer,
Drainpipe is equipped with the water distribution drainage blanket, filter layer, sludge dewatering are provided, in sequence from bottom to top, with the hollow circuit cylinder pond body
Net, bottom-mud dewatering unit, are equipped with vent stack in the solid cylindrical, in first purifying layer equipped with least two with it is described
The ventilation transverse tube that vent stack is connected, the bottom-mud dewatering unit include being arranged on the hollow master on the outside of the solid cylindrical
Axis, the center bearing bracket being arranged at the top of the solid cylindrical, the shape that is centrosymmetric are staggered scrapes mud in hollow spindle side
Blade and/or press wiper blade, the rack circle guide rail that is arranged on the outside of hollow circuit cylinder pond body, be arranged on the rack circle guide rail
On driving mechanism, the truss girder that is connected respectively with driving mechanism and hollow spindle of both ends.
Preferably, the motor in the driving mechanism through retarder speed governing rear drive gear in the rack circle guide rail
Upper movement, driving truss girder and hollow spindle are turned round around the solid cylindrical.
Preferably, the center bearing bracket includes the bearing block being arranged on the solid cylindrical and is arranged on the bearing
Adjusting center bearing on seat, the bearing block are connected with the pre-embedded bolt on solid cylindrical, the bearing block and adjusting center bearing
Middle part is equipped with round hole, and the vent stack is exported from the round hole.
Preferably, the hollow spindle is cylindrical, is connected inside the hollow spindle with the adjusting center bearing, described
Hollow spindle top is connected with the truss girder, and the hollow spindle crown center is equipped with the circle of export vent stack
Hole.
Preferably, the mud blade of scraping is formed by steel pipe welding, and the mud blade of scraping is in integrally triangular prism column, described to scrape
The section of mud blade is right angled triangle, and the bevel edge of right angled triangle is scrapes mud face, and grid close under upper dredge is in the mud face of scraping；
The pressure wiper blade makees skeleton surface covering steel plate by rectangular steel pipe and angle steel and welds and formed, and the pressure wiper blade is in integrally blade
Shape, the pressure wiper blade are set diagonally downward.
Preferably, the herringbone net that the sludge dewatering net forms for monofilament polyester braiding, the sludge dewatering net perforate
Rate is 20~30%, the surface coating hydrophobic nano release coating of the sludge dewatering net；The filter layer is 20 by particle diameter
The gravel filtrate of~30mm is laid with and forms, and it is 30~40cm to be laid with height.
Preferably, first purifying layer is (4~5) by volume ratio：1 peach shell activated carbon is filled with zeolite mixed fillers
Form；Second purifying layer is formed by being modified super-activated carbon laying；The water distribution drainage blanket is formed by cobble filling laying；
Grid layer is equipped between first purifying layer and the second purifying layer, between second purifying layer and water distribution drainage blanket.
Preferably, the preparation process of the modified super-activated carbon includes：
By active carbon from coal and KOH solution according to 1：The mass ratio of (3~5) is mixed, and is then inserted in activation furnace,
N2Dehydrated under atmosphere at 300~400 DEG C and 1~2h of low-temperature carbonization, be then warming up to 700~800 with 4 DEG C/min
DEG C constant temperature activates 1~2h, afterwards in N2Activation products are cooled to room temperature under atmosphere, again with steaming after washing 1~2 time with dilute hydrochloric acid
Distilled water washs 2~3 times until pH is 7, by the activation products after washing in drying box dry 24h at 100~110 DEG C, obtain
Super-activated carbon；
Under anaerobic, the super-activated carbon of above-mentioned preparation is positioned over anaerobic ammonia oxidizing bacteria and is mixed with amonifying bacteria and hanged
Uniformly mixed in turbid, being put into low speed in 30~35 DEG C of constant-temperature tables after standing 2h under sealing rocks 24h, until super-activated carbon
Absorption strain reaches saturation, in N after filtering2It is dried under atmosphere in 15~20 DEG C, obtains load anaerobic ammonia oxidizing bacteria and ammonia
Change the modification super-activated carbon of bacterium.
Preferably, the vent stack upper end is equipped with ammonia absorption amchine structure, and the ammonia absorption amchine structure is by permeable watertight
Film parcel acetic acid be made；The ventilation transverse tube is centrosymmetric centered on vent stack to be uniformly distributed, the ventilation transverse tube
Tube wall be equipped with outlet hole.
Another object of the present invention is to provide a kind of Dredged bed mud on-site treatment method, the Dredged bed mud is just located in
Reason method includes the following steps：
A, an artificial swamp, and the Manual moist are built at interval of the distance of 20~25m along the side in dredging river
Ground water inlet direction is consistent with streamflow direction, is set at least in the side in the front of the water inlet of artificial swamp and remote water
Dredged bed mud treatment in situ system described in one, the drainpipe and artificial swamp of the Dredged bed mud treatment in situ system bottom
Water inlet be connected；
B, Dredged bed mud is placed in hollow circuit cylinder pond body, and starts bottom-mud dewatering unit after flocculant is added；
C, the bed mud moisture content in hollow circuit cylinder pond body is continued to monitor, is treated in hollow circuit cylinder pond body under Dredged bed mud moisture content
When dropping to 70~80%, remove bottom-mud dewatering unit and stand 3~5 days；
D, curing agent is added in the Dredged bed mud into hollow circuit cylinder pond body, stablizes Dredged bed mud in hollow circuit cylinder pond body
Change；
E, into hollow circuit cylinder pond body upper strata covering 50~80cm thickness of Dredged bed mud planting soil, and in the planting soil
The interior tall shrub plant of plantation.
Based on above-mentioned technical proposal, it is an advantage of the invention that：
1) bed mud floor space reduces significantly after the present invention is handled, and Dredged bed mud is just located near river
Reason, reduces bed mud cost of transportation, alleviates influence of the bed mud to environment.
2) the bottom-mud dewatering unit set in the present invention, scrape cell structure cooperation close under being dredged on mud blade has one with ground
The pressure wiper blade at clamp angle, the compression to bed mud is realized while bed mud is stirred, compares and only leans on gravity dehydration, bottom-mud dewatering effect
Rate has obtained greatly being lifted.In addition bottom-mud dewatering unit also has advantage easy to use, can install and dismantle immediately, and can
Recycling.
3) present invention is directed to the characteristics of pollutant loads such as deslimed wastewater nitrogen phosphorus, heavy metal and organic matter are high, is provided with
Treatment facilities is layered, and is combined with artificial wet land system, ensure that the final process effect of deslimed wastewater, finally the row of disclosure satisfy that
Enter the standard in river.In addition, later stage bed mud percolate and under ooze rainwater, can all pass through each layering purification and the people of the system
Work wetland is effectively addressed, so as to solve pollution problem caused by bed mud percolate and rainwater infiltration.
4) present invention is in plant of the plantation on the bed mud after curing with absorption heavy metal and reclamation result, bed mud
Phosphorus and nitrogen can promote the growth of plant, and plant reacts on bed mud and it can be improved, and plays good bottom
The innoxious effect of mud.
5) Dredged bed mud treatment in situ system proposed by the present invention is combined with artificial swamp, is distributed, is formd good along riverbank
Good landscape effect, Dredged bed mud have obtained good recycling.
Brief description of the drawings
Attached drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is Dredged bed mud treatment in situ system structure diagram；
Fig. 2 is Dredged bed mud treatment in situ system schematic top plan view；
Fig. 3 is Dredged bed mud treatment in situ system perspective diagram；
Fig. 4 is to scrape mud blade construction schematic diagram；
Fig. 5 is pressure wiper blade structure diagram；
Fig. 6 is Dredged bed mud on-site treatment method schematic diagram.
Embodiment
Below by drawings and examples, technical scheme is described in further detail.
Embodiment 1
The present invention provides a kind of Dredged bed mud treatment in situ system, as shown in Fig. 1~Fig. 6, wherein, show the present invention
A kind of preferred embodiment.Master includes bottom-mud dewatering to Dredged bed mud treatment in situ system proposed by the present invention successively from up to down
Five unit, filter layer, the first purifying layer, the second purifying layer, water distribution drainage blanket parts.
Specifically, the Dredged bed mud treatment in situ system includes the hollow circuit cylinder pond body 4 on top and the hollow circuit cylinder
Bowl-type pond body 8 that 4 lower part of pond body is connected, the solid cylindrical 5 for being arranged on 8 center of hollow circuit cylinder pond body 4 and bowl-type pond body, institute
State bowl-type pond body 8 and be provided, in sequence from bottom to top, with water distribution drainage blanket 10, the second purifying layer 11, the first purifying layer 12, the water distribution row
Drainpipe 9 is equipped with water layer 10, be provided, in sequence from bottom to top, with the hollow circuit cylinder pond body 4 filter layer 13, sludge dewatering net 6,
Bottom-mud dewatering unit, the solid cylindrical 5 is interior to be equipped with vent stack 15, and at least two and institute are equipped with first purifying layer 12
The ventilation transverse tube 14 that vent stack 15 is connected is stated, the bottom-mud dewatering unit includes being arranged on the outside of solid cylindrical 5
Hollow spindle 16, the center bearing bracket 18 being arranged at the top of the solid cylindrical 5, the shape that is centrosymmetric are staggered in hollow spindle
Mud blade 17 and/or pressure wiper blade 19 are scraped, the rack circle guide rail 3 in the outside of hollow circuit cylinder pond body 4 is arranged on, sets in 16 sides
The truss master that driving mechanism 2, both ends on the rack circle guide rail 3 are connected with driving mechanism 2 and hollow spindle 16 respectively
Beam 1.
As shown in Figure 1, the hollow circuit cylinder pond body for 6~6.5m of diameter is built on the Dredged bed mud treatment in situ system top by laying bricks or stones
4, lower part is bowl structure, and the wide 1.4~1.5m of bottom of pond, the centre of lower part bowl-type pond body 8 is equipped with the concrete structure of a diameter of 1m
Solid cylindrical 5.Pre-buried vent stack 15 in 5 cylinder of solid cylindrical, the hollow circuit cylinder pond body 4 and bowl-type pond body 8
Pool wall selects water tight concrete to build by laying bricks or stones, and pond inner wall need to ensure its slickness, and is laid with impervious material and carries out antiseepage work, institute
The total depth for stating Dredged bed mud treatment in situ system is 5~5.5m.
As shown in fig. 6, the Dredged bed mud treatment in situ system 21 of the present invention is preferably used in combination with artificial swamp 22, institute
It is preferably vertical subsurface flow wetland to state artificial swamp 22.Along the side or both sides in dredging river 20, at interval of 20~25m's
Distance one artificial swamp 22 of structure, the water inlet direction of artificial swamp 22 are consistent with streamflow direction.In artificial swamp 22
The front of water inlet and the multiple Dredged bed mud treatment in situ systems 21 of side setting away from water, around wetland.Dredged bed mud
The water inlet of 9 artificial swamp 22 of drainpipe of 21 bottom for the treatment of in situ system is connected, the deslimed wastewater after treated need by
Artificial swamp 22 further after purification, is discharged into river 20 nearby.
Preferably, the bottom-mud dewatering unit includes being arranged on the hollow spindle 16 in the outside of solid cylindrical 5, is arranged on
Center bearing bracket 18, the shape that is centrosymmetric at the top of solid cylindrical 5 are staggered and scrape mud blade in 16 side of hollow spindle
17 and/or pressure wiper blade 19, the rack circle guide rail 3 in the outside of hollow circuit cylinder pond body 4 is arranged on, the rack circle is arranged on and leads
The truss girder 1 that driving mechanism 2, both ends on rail 3 are connected with driving mechanism 2 and hollow spindle 16 respectively.
1 one end of truss girder is fixed with hollow spindle 16, and hollow spindle 16 is installed in the top of solid cylindrical 5 at middle part
On cardiac skeleton 18, scrape mud blade 17 and pressure wiper blade 19 is fixed on hollow spindle 16.16 other end of truss girder and driving machine
Structure 2 is connected, and the motor in driving mechanism is moved through retarder speed governing rear drive gear on rack circle guide rail 3, drives purlin
Frame girder 1 and hollow spindle 16 are turned round around the solid cylindrical 5.Truss girder 1 is formed by angle splice joint, and different units are in triangle
Shape, has good stability, and with screw connection or welding at node, ensures that sufficient intensity overall structure mechanical property is strong, stability is good.
The driving unit can also use other kinds of drive, such as gear drive, also can extend or increase by 1 structure of truss girder,
Multipoint Drive is circumferentially used, centre-driven mode can also be used at axle center.
Preferably, the center bearing bracket 18 includes the bearing block being arranged on the solid cylindrical 5 and is arranged on described
Adjusting center bearing on bearing block.The bearing block is connected with the pre-embedded bolt on solid cylindrical 5, grease-added after connection to be used in combination
Protective cover seals, easy to be dismantled after the completion of bed mud stirring dehydration.The bearing block is with being equipped with circle in the middle part of adjusting center bearing
Hole, the vent stack 15 are exported from the round hole, and Selection of Bearings can bear the adjusting center bearing of the longitudinal force of vertical direction.
As shown in Fig. 2, the hollow spindle 16 is cylindrical, the inside of hollow spindle 16 connects with the adjusting center bearing
Connect, 16 top of hollow spindle is connected with the truss girder 1, and 16 crown center of hollow spindle is equipped with export
The circular hole of vent stack 15, draws easy to vent stack 15.It is described scrape mud blade 17 with pressure wiper blade 19 be centrosymmetric shape friendship
Mistake is arranged in the surrounding of hollow spindle 16.
As shown in Fig. 3, Fig. 4, Fig. 5, the mud blade 17 of scraping is formed by steel pipe welding, and the entirety of mud blade 17 of scraping is in three
Angle prism-shaped, the section for scraping mud blade 17 are right angled triangle, and the bevel edge of right angled triangle is described to scrape mud face to scrape mud face
For grid close under upper dredge.The pressure wiper blade 19 makees skeleton surface covering steel plate by rectangular steel pipe and angle steel and welds and formed, institute
It is in that foliaceous is set diagonally downward with proof strength, the pressure wiper blade 19 that it is overall, which to state pressure wiper blade 19,.
The bottom-mud dewatering unit is in the process of running, overall to be connected with center bearing bracket 18, in 2 driving truss of driving mechanism
Girder 1, hollow spindle 16, scrape mud blade 17 and press wiper blade 19 to be rotated clockwise around solid cylindrical 5.It is described to scrape mud blade 17
Using it is in a certain angle with bottom surface and it is upper dredge under close cell structure, the sludge for promoting bottom moisture content relatively low moves upwards, together
When promote moisture content higher sludge in top to be moved downward through grid.And the pressure wiper blade 19 in the middle part of the sludge blanket using with
Bottom surface complete hard surface in a certain angle, produces the effect of extruding base sludge, coordinates with scraping mud blade 17, greatly promote
Bottom-mud dewatering effect.In addition, after bottom-mud dewatering unit completes local sludge dewatering treatment, all components are detachable, so as to
Reuse.
Scraped in the present invention mud blade 17 and pressure wiper blade 19 can be used cooperatively, can also be used alone scrape mud blade 17 or
Wiper blade 19 is pressed, the density scraped mud blade 17 and press wiper blade 19 to be circumferentially distributed can also be adjusted.It is described to scrape mud blade 17
Also other materials and grid form can be used, as long as structure close under reaching thin.The pressure wiper blade 19 can also use
Other materials and fixed form, as long as reaching the effect that inclined plane is pressed down against.
Further, the herringbone net that the sludge dewatering net 6 forms for monofilament polyester braiding, the sludge dewatering net 6 are opened
Porosity is 20~30%, the surface coating hydrophobic nano release coating of the sludge dewatering net 6.Specifically, the sludge takes off
The network of rivers 6 is using monofilament polyester as raw material, herringbone net, and percent opening is 20~30%, and mesh number is about 30 mesh, the sludge dewatering net 6
Ventilative, permeable but impermeable mud, also has the characteristics that acidproof, alkaline-resisting, heat safe.Pass through the net surface in the sludge dewatering net 6
One layer of nanometer anti-sticking coating need to be smeared so that bed mud cannot be adhered to the surface of coating, and coating surface has hydrophobicity so that
Deslimed wastewater can run through mesh and penetrate into lower floor's filter layer 13, without causing siltation to block.
Since sludge has a high-hydrophilic, the combination power of water and sewage sludge solid particle is very strong in sludge, if without advance
Processing, then the dehydration of most sludge is extremely difficult.The present invention is inverted into bottom-mud dewatering unit by Dredged bed mud
In after, add flocculant and Dredged bed mud carried out quenched, destroy the colloform texture in Dredged bed mud, reduce the parent of bed mud and water
And power, and be equipped with after mechanical agitation so that the water in bed mud is easier to slough hence into understructure.
The filter layer 13 is located at bottom-mud dewatering unit lower part, selects the gravel filtrate that particle diameter is 20~30mm to fill, paving
If being highly about 30~40cm, the purpose that this layer is set is the macromolecular particle material filtered in deslimed wastewater.
Preferably, first purifying layer 12 is (4~5) by volume ratio：1 peach shell activated carbon is filled out with zeolite mixed fillers
Fill and form；The layer is located at 13 lower part of filter layer, and the top of second purifying layer 11, it is about 30~40cm to be laid with height.It is described
Grid is equipped between first purifying layer 12 and the second purifying layer 11, grid grid is the lattice of 5~10mm of the length of side, is prevented two layers
The mixing of filtrate.
Peach shell activated carbon needs to rinse until water outlet is limpid by the multiple of distilled water before first purifying layer 12 is inserted,
Here it is to adsorb the heavy metal ion in deslimed wastewater to select peach shell activated carbon, and peach shell activated carbon has ten to heavy metal
Divide good adsorption effect.Heavy metal ion, which has Anammox reaction in the second purifying layer 11 described in lower floor, to be suppressed to make
With, therefore on 11 top of the second purifying layer the first purifying layer 12 is set so as to the heavy metal ion in adsorbing deslimed wastewater.
As shown in Figure 1, vent stack 15 pre-buried in the solid cylindrical 5 at middle part can be passed through in the first purifying layer 12.The layer contains on a small quantity
Zeolite filler, for absorbing the part ammonia nitrogen ion in deslimed wastewater, under aerobic condition, part ammonia nitrogen on zeolite in occurring
Half nitrification and nitration reaction, microorganism is by part NH4 +- N is converted into NO2 -- N and NO3 --N。
Second purifying layer 11 is located at the lower part of the first purifying layer 12, and the top of water distribution drainage blanket 10, selects a diameter of 5
The column shape of~10mm is modified super-activated carbon laying and forms, and it is about 80~90cm to be laid with height.Water distribution drainage blanket 10 and second
Grid is set between purifying layer 11, and the grid of the grid is the lattice of 5~10mm of the length of side, to prevent two layers of filtrate mixing.
Conventional activated carbon is passed through since the problems such as specific surface area is smaller, and adsorption selectivity is poor has been unable to meet requirement
Super-activated carbon made from specific process has the pore structure of prosperity, huge specific surface area and adsorption capacity, therefore the present invention
Activated carbon is selected to prepare super-activated carbon using chemical activation method as raw material.Herein it should be noted that institute in the present invention
It is active carbon from coal to select activated carbon, and the Lignin Activated Carbons such as coconut husk, stalk should not be selected to prepare super-activated carbon, because wooden
Element has ammoniation the effect of suppression, is unfavorable for the progress of this layer of aminating reaction.
Further, the preparation process of the modified super-activated carbon includes：
By active carbon from coal and KOH solution according to 1：The mass ratio of (3~5) is mixed, and is then inserted in activation furnace,
N2Dehydrated under atmosphere at 300~400 DEG C and 1~2h of low-temperature carbonization, be then warming up to 700~800 with 4 DEG C/min
DEG C constant temperature activates 1~2h, afterwards in N2Activation products are cooled to room temperature under atmosphere, again with steaming after washing 1~2 time with dilute hydrochloric acid
Distilled water washs 2~3 times until pH is 7, by the activation products after washing in drying box dry 24h at 100~110 DEG C, obtain
Super-activated carbon；
Under anaerobic, the super-activated carbon of above-mentioned preparation is positioned over anaerobic ammonia oxidizing bacteria and is mixed with amonifying bacteria and hanged
Uniformly mixed in turbid, being put into low speed in 30~35 DEG C of constant-temperature tables after standing 2h under sealing rocks 24h, until super-activated carbon
Absorption strain reaches saturation, in N after filtering2It is dried under atmosphere in 15~20 DEG C, obtains load anaerobic ammonia oxidizing bacteria and ammonia
Change the modification super-activated carbon of bacterium.
The ammonia nitrogen and organic nitrogen of higher concentration are typically contained in deslimed wastewater, second purifying layer 11 selects above-mentioned modification
Super-activated carbon is filler, under anaerobic, main that aminating reaction and Anammox reaction occurs.In the described second purification
In layer 11, modified super-activated carbon can largely Adsorption of Dissolved organic nitrogen (DON) and ammonia nitrogen, be supported on modified super-activated carbon
On amonifying bacteria DON can be converted into NH4 +- N, and the anaerobic ammonia oxidizing bacteria on super-activated carbon is supported on NH4 +- N is
Electron donor, with NO2 -- N and NO3 -- N is electron acceptor, is nitrogen by the mineralized nitrogen in deslimed wastewater.So through described
Two purifying layers, 11 purified deslimed wastewater, TN contents, which will have, significantly to be declined.
Further, the water distribution drainage blanket 10 is located at the orlop of funnel-shaped structure, selects the ovum that particle diameter is 30~40mm
Stone filling laying forms, and it is 40~50cm to be laid with height, and bottommost sets at least two drainpipes 9.Drainpipe 9 can be with vertical current
The water inlet of artificial swamp is connected, and purified deslimed wastewater is discharged into wetland and is further purified, you can is discharged into nearby
In river.
The snorkel that the present invention is set is embedded in the concrete solid cylinder 5 of centre, and snorkel is by 15 He of vent stack
14 two parts of transverse tube of ventilating form, and diameter is 10cm.The height of the vent stack 15 is 360~380cm, vent stack 15
Foot is arranged on the position of the first purifying layer 12, and lower part extends four ventilation transverse tubes 14 and is inserted into the first purifying layer 12
Inside, four first purifying layers 12 are centrosymmetric centered on vent stack 15 and are uniformly distributed, between adjacent vent stack 15
Angle be 90 °, it is single ventilation transverse tube 14 length be 100~150cm, ventilation transverse tube 14 on open multiple holes, facilitate gas
Disengaging.
Preferably, 15 upper outlet of vent stack is located at the round hole at the top of solid cylindrical 5, and described logical
15 upper end of gas vertical tube is equipped with ammonia absorption amchine structure.The ammonia absorption amchine structure is made of the film parcel acetic acid of permeable watertight, and
It can be taken off, being capable of periodic replacement.The nitrogen that second purifying layer 11 produces can be discharged with ammonia by snorkel, and ammonia can
It is absorbed in the outlet of vent stack 15, prevents ammonia to be directly discharged to pollute in air.
Embodiment 2
Present invention also offers a kind of Dredged bed mud on-site treatment method, the Dredged bed mud on-site treatment method is included such as
Lower step：
A, an artificial swamp 22, and the people are built at interval of the distance of 20~25m along the side in dredging river 20
The water inlet of work wetland 22 direction is consistent with streamflow direction.As shown in fig. 6, in the front of the water inlet of artificial swamp 22 and far
Side from water sets at least one Dredged bed mud treatment in situ system 21, the Dredged bed mud treatment in situ system 21
The drainpipe 9 of bottom is connected with the water inlet of artificial swamp 22.
B, Dredged bed mud is placed in hollow circuit cylinder pond body 4, and starts bottom-mud dewatering unit after flocculant is added, wadding
The preferred organic flocculant of solidifying agent, such as starch, cellulose, PAM etc..
C, the bed mud moisture content in hollow circuit cylinder pond body 4 is continued to monitor, treats Dredged bed mud moisture content in hollow circuit cylinder pond body 4
When dropping to 70~80%, remove bottom-mud dewatering unit and stand 3~5 days.
D, curing agent is added in the Dredged bed mud into hollow circuit cylinder pond body 4, makes Dredged bed mud in hollow circuit cylinder pond body 4 steady
Fixedization, curing agent can specifically be determined according to sediment pollution species, alternative to have flyash, lime stone, bentonite etc..
E, into hollow circuit cylinder pond body 4 upper strata covering 50~80cm thickness of Dredged bed mud planting soil, and in the plantation
The tall shrub plant of plantation in native, plant may be selected to absorb heavy metal, the plant of improveing soil is planted.
The Dredged bed mud on-site treatment method of the present invention at least has the following advantages：
1) bed mud floor space reduces significantly after the present invention is handled, and Dredged bed mud is just located near river
Reason, reduces bed mud cost of transportation, alleviates influence of the bed mud to environment.
2) the bottom-mud dewatering unit set in the present invention, scrape cell structure cooperation close under being dredged on mud blade has one with ground
The pressure wiper blade at clamp angle, the compression to bed mud is realized while bed mud is stirred, compares and only leans on gravity dehydration, bottom-mud dewatering effect
Rate has obtained greatly being lifted.In addition bottom-mud dewatering unit also has advantage easy to use, can install and dismantle immediately, and can
Recycling.
3) present invention is directed to the characteristics of pollutant loads such as deslimed wastewater nitrogen phosphorus, heavy metal and organic matter are high, is provided with
Treatment facilities is layered, and is combined with artificial wet land system, ensure that the final process effect of deslimed wastewater, finally the row of disclosure satisfy that
Enter the standard in river.In addition, later stage bed mud percolate and under ooze rainwater, can all pass through each layering purification and the people of the system
Work wetland is effectively addressed, so as to solve pollution problem caused by bed mud percolate and rainwater infiltration.
4) present invention is in plant of the plantation on the bed mud after curing with absorption heavy metal and reclamation result, bed mud
Phosphorus and nitrogen can promote the growth of plant, and plant reacts on bed mud and it can be improved, and plays good bottom
The innoxious effect of mud.
5) Dredged bed mud treatment in situ system proposed by the present invention is combined with artificial swamp, is distributed, is formd good along riverbank
Good landscape effect, Dredged bed mud have obtained good recycling.
Finally it should be noted that:The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
It can modify to the embodiment of the present invention or equivalent substitution is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical solution, it should all cover among the claimed technical solution scope of the present invention.
Claims (10)
- A kind of 1. Dredged bed mud treatment in situ system, it is characterised in that：Hollow circuit cylinder pond body (4) including top, with it is described in Bowl-type pond body (8) that hollow round column pond body (4) lower part is connected, be arranged on the hollow circuit cylinder pond body (4) and bowl-type pond body (8) center Solid cylindrical (5), the bowl-type pond body (8) is provided, in sequence from bottom to top, with water distribution drainage blanket (10), the second purifying layer (11), One purifying layer (12), the water distribution drainage blanket (10) is interior to be equipped with drainpipe (9), and the hollow circuit cylinder pond body (4) is interior from bottom to top Filter layer (13), sludge dewatering net (6), bottom-mud dewatering unit are equipped with successively, and vent stack is equipped with the solid cylindrical (5) (15), at least two ventilation transverse tubes (14) being connected with the vent stack (15) are equipped with first purifying layer (12), The bottom-mud dewatering unit includes being arranged on hollow spindle (16) on the outside of the solid cylindrical (5), is arranged on the solid circle Center bearing bracket (18), the shape that is centrosymmetric at the top of column (5) are staggered scrapes mud blade (17) in hollow spindle (16) side And/or press wiper blade (19), the rack circle guide rail (3) being arranged on the outside of hollow circuit cylinder pond body (4), be arranged on the round tooth The truss girder that driving mechanism (2), both ends on bar guide rail (3) are connected with driving mechanism (2) and hollow spindle (16) respectively (1)。
- 2. Dredged bed mud treatment in situ system according to claim 1, it is characterised in that：In the driving mechanism (2) Motor is moved through retarder speed governing rear drive gear on the rack circle guide rail (3), driving truss girder (1) and hollow Main shaft (16) is turned round around the solid cylindrical (5).
- 3. Dredged bed mud treatment in situ system according to claim 1, it is characterised in that：The center bearing bracket (18) includes The bearing block being arranged on the solid cylindrical (5) and the adjusting center bearing being arranged on the bearing block, the bearing block It is connected with the pre-embedded bolt on solid cylindrical (5), for the bearing block with being equipped with round hole in the middle part of adjusting center bearing, the ventilation is perpendicular (15) are managed to export from the round hole.
- 4. Dredged bed mud treatment in situ system according to claim 3, it is characterised in that：The hollow spindle (16) is in circle Tubular, the hollow spindle (16) is internal to be connected with the adjusting center bearing, hollow spindle (16) top and the truss Girder (1) is connected with, and hollow spindle (16) crown center is equipped with the circular hole of export vent stack (15).
- 5. Dredged bed mud treatment in situ system according to claim 1, it is characterised in that：The mud blade (17) of scraping is by steel Pipe welding forms, and mud blade (17) entirety of scraping is in triangular prism column, and the section for scraping mud blade (17) is right angle trigonometry Shape, the bevel edge of right angled triangle is scrapes mud face, and grid close under upper dredge is in the mud face of scraping；The pressure wiper blade (19) is by rectangle Steel pipe and angle steel make skeleton surface covering steel plate and weld to be formed, and the pressure wiper blade (19) is in integrally foliaceous, the pressure waterleaf Piece (19) is set diagonally downward.
- 6. Dredged bed mud treatment in situ system according to claim 1, it is characterised in that：The sludge dewatering net (6) is The herringbone net that monofilament polyester braiding forms, sludge dewatering net (6) percent opening are 20~30%, the sludge dewatering net (6) surface coating hydrophobic nano release coating；The filter layer (13) is laid with by the gravel filtrate that particle diameter is 20~30mm Form, it is 30~40cm to be laid with height.
- 7. Dredged bed mud treatment in situ system according to claim 1, it is characterised in that：First purifying layer (12) by Volume ratio is (4~5)：1 peach shell activated carbon is formed with the filling of zeolite mixed fillers；Second purifying layer (11) is by modified super Level activated carbon, which is laid with, to be formed；The water distribution drainage blanket (10) is formed by cobble filling laying；First purifying layer (12) and the Grid layer is equipped between two purifying layers (11), between second purifying layer (11) and water distribution drainage blanket (10).
- 8. Dredged bed mud treatment in situ system according to claim 7, it is characterised in that：The modified super-activated carbon Preparation process includes：By active carbon from coal and KOH solution according to 1：The mass ratio of (3~5) is mixed, and is then inserted in activation furnace, in N2Atmosphere Dehydrated under enclosing at 300~400 DEG C and 1~2h of low-temperature carbonization, 700~800 DEG C of perseverances are then warming up to 4 DEG C/min Temperature 1~2h of activation, afterwards in N2Activation products are cooled to room temperature under atmosphere, distilled water is used again after washing 1~2 time with dilute hydrochloric acid Washing 2~3 times is 7 until pH, by the activation products after washing in drying box dry 24h at 100~110 DEG C, obtain super Activated carbon；Under anaerobic, the super-activated carbon of above-mentioned preparation is positioned over anaerobic ammonia oxidizing bacteria and amonifying bacteria mixing suspension In uniformly mix, seal lower stand and be put into low speed in 30~35 DEG C of constant-temperature tables after 2h and rock 24h, until super-activated carbon adsorbs Strain reaches saturation, in N after filtering2It is dried under atmosphere in 15~20 DEG C, obtains load anaerobic ammonia oxidizing bacteria and ammonification is thin The modification super-activated carbon of bacterium.
- 9. Dredged bed mud treatment in situ system according to claim 1, it is characterised in that：Vent stack (15) upper end Equipped with ammonia absorption amchine structure, the ammonia absorption amchine structure is made of the film parcel acetic acid of permeable watertight；The ventilation transverse tube (14) it is centrosymmetric and is uniformly distributed centered on vent stack (15), the tube wall of the ventilation transverse tube (14) is equipped with venthole Hole.
- A kind of 10. Dredged bed mud on-site treatment method, it is characterised in that：The Dredged bed mud on-site treatment method includes following step Suddenly：A, an artificial swamp (22), and the people are built at interval of the distance of 20~25m along the side of dredging river (20) Work wetland (22) water inlet direction is consistent with streamflow direction, in the front of the water inlet of artificial swamp (22) and away from water Side sets the Dredged bed mud treatment in situ system described in any one claim at least one the claims 1~9 Unite (21), the drainpipe (9) of Dredged bed mud treatment in situ system (21) bottom is connected with the water inlet of artificial swamp (22)；B, Dredged bed mud is placed in hollow circuit cylinder pond body (4), and starts bottom-mud dewatering unit after flocculant is added；C, the bed mud moisture content in hollow circuit cylinder pond body (4) is continued to monitor, treats Dredged bed mud moisture content in hollow circuit cylinder pond body (4) When dropping to 70~80%, remove bottom-mud dewatering unit and stand 3~5 days；D, curing agent is added in the Dredged bed mud into hollow circuit cylinder pond body (4), makes Dredged bed mud in hollow circuit cylinder pond body (4) steady Fixedization；E, into hollow circuit cylinder pond body (4) upper strata covering 50~80cm thickness of Dredged bed mud planting soil, and in the planting soil The interior tall shrub plant of plantation.
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| CN107935357B (en) | 2023-12-05 |
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