CN107540181A - Black-odor riverway bed mud covering material preparation method - Google Patents
Black-odor riverway bed mud covering material preparation method Download PDFInfo
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- CN107540181A CN107540181A CN201710896120.8A CN201710896120A CN107540181A CN 107540181 A CN107540181 A CN 107540181A CN 201710896120 A CN201710896120 A CN 201710896120A CN 107540181 A CN107540181 A CN 107540181A
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Abstract
The present invention discloses a kind of black-odor riverway bed mud covering material preparation method.Comprise the following steps：(1) flyash and oxygen slow release material are mixed and stirred for according to pre- ratio obtaining the first mixing material；(2) the first mixing material is mixed with curing materials, and stirs and obtain the second mixing material；(3) water is added in the second mixing material obtained into step (2) and is stirred, mixture is obtained, mixture extruder grain is obtained into firming body precursor；(4) the firming body precursor in step (3) is carried out air-drying in its natural state handling to obtain firming body；(5) firming body obtained in step (4) is heated under the protection of nitrogen, covering material is obtained after natural cooling.The preparation method of the black smelly water river bottom mud covering material of the present invention, based on flyash, fusion oxygen slow release material and solidification material, through special process, covering material is made, has good treatment effect to the nutritive salt such as the heavy metal of sediment release, N, P and hardly degraded organic substance.
Description
Technical field
The invention belongs to water environment treatment field, especially setting and a kind of black-odor riverway bed mud covering material preparation method.
Background technology
To subtract the important accumulation storehouse that bed mud is pollutant, the major pollutants of accumulation have the nutritive salt such as heavy metal, N, P and difficulty
Degradation of organic substances, its content keep certain dynamic equilibrium up to the hundreds of times in water body, and with aqueous phase.When environmental condition is sent out
During changing, the pollutant in bed mud may discharge, again polluted-water.So polluted bed mud by serious threat
The health of the mankind and the environment in the world, the improvement to polluted bed mud are very urgent.
At present, polluted bed mud control technology mainly has in-situ treatment technology and the major class of dystopy treatment technology 2.In-situ treatment skill
Art is that polluted bed mud stays put, and takes measures to prevent pollutants in sediments from entering water body, that is, cuts off the pollution way of presence of pollution sources
Footpath；Dystopy treatment technology be polluted bed mud is excavated transport it is other place after handled again, i.e., by the interior dirt of water body
Dye source moves away, to prevent polluted-water.The in-situ treatment technology being widely used at present mainly has covering (masking), solidification, oxygen
Change, diversion, physics elution, jet and electromotion repairing technique etc..Dystopy treatment technology mainly has dredging, dystopy elution, vitrifying
Deng.Cover (masking) as a kind of in-situ treatment technology of bed mud to the repairing effect of polluted bed mud clearly, and engineering
Low cost, can effectively prevent pollutant in bed mud enter water body and caused by secondary pollution, whether organic contamination or nothing
The bed mud of machine pollution type is applicable.
Soverlay technique in situ by laid on polluted bed mud surface one or more layers cleaning covering, make polluted bed mud with
Upper strata water body isolation, so as to prevent migration of the pollutant to water body in bed mud.Covering has following 3 aspect function：1) by covering
Cap rock, by polluted bed mud with upper strata water body is physical separates；2) covering effect can consolidate polluted bed mud, prevent its settling flux or move
Move；3) by the suction-operated of organic granular in covering, effectively cut down pollutant in polluted bed mud and enter upper strata water body.
There are untainted bed mud, cleaning sand, gravel, calcium bentonite, lime-ash, people using more masking material at present
Work zeolite, calcite, geotextile or some complicated artificial foundation materials etc. can also be used.Different covering materials and its
Effect is closely related, selects mainly to consider following several respects characteristic of material during covering material：1) particle diameter of covering material, particle diameter
Smaller, obstructing capacity is stronger, and the penetration capacity of pollutant is lower；2) in covering material the content of organic matter, covering material ratio table
Area and porosity, these characteristics are related to the adsorption capacity of pollutant to it；3) proportion or density of covering material, the characteristic
It is related to the function of its water resistant flow disturbance, firm polluted bed mud.
But current masking material is more based on inorganic sandstone, there is that specific surface area is small, and absorption property is poor, it is structural not
It is good, it is impossible to while heavy metal is realized, the processing of the nutritive salt such as N, P and hardly degraded organic substance, and easily cause anaerobism or simultaneous
Property anaerobic environment, can not be realized for a long time to water correction effect.
The content of the invention
In view of the above-mentioned problems, the present invention provides a kind of preparation for the black-odor riverway bed mud covering material that can repair river bottom mud
Method.
To reach above-mentioned purpose, a kind of black-odor riverway bed mud covering material preparation method of the present invention, comprise the following steps：
(1) flyash and oxygen slow release material are mixed and stirred for according to pre- ratio obtaining the first mixing material；
(2) the first mixing material is mixed with curing materials, and stirs and obtain the second mixing material；
(3) water is added in the second mixing material obtained into step (2) and is stirred, mixture is obtained, mixture is squeezed
Pressure granulation obtains firming body precursor；
(4) the firming body precursor in step (3) is carried out to air-dried processing in its natural state and obtains firming body；
(5) firming body obtained in step (4) is heated under the protection of nitrogen, covered after natural cooling
Cover material.
Further, the mass parts of the flyash are 100 parts, and the mass parts of the oxygen slow release material are 5-10 parts, institute
The mass parts for stating solidification material are 10-50 parts.
Further, the quality of the water is the 10%-50% of the second mixing material quality.
Further, the oxygen slow release material is included by the calper calcium peroxide of poly-lactic acid material parcel or by poly-lactic acid material bag
One or both of peromag wrapped up in.
Further, the solidification material includes any one in cement, active calcium oxide, activated magnesia or waterglass
It is or several.
Further, the firming body precursor is alveolate texture, and the firming body precursor is shaped as cube, spheroidal
Or column.
Further, the pore diameter range of the firming body alveolate texture is 1mm-30mm.
Further, the time for carrying out air-drying processing in the step (4) is 6-10 days.
Further, heat treatment temperature is 300-500 DEG C in the step (5)；Heating treatment time is 2-3 hours.
Further, in the step (1) and step (2), stir speed (S.S.) when being stirred is 90-150rpm, stirring
Time is 15-30min.
The preparation method of the black smelly water river bottom mud covering material of the present invention, based on flyash, merge oxygen slow release material
With solidification material, structural good, bigger than table covering material is formed；Mud covering material is porous, can be provided for microorganism preferably numerous
Place is grown and grows, simultaneously containing oxygen slow release material, the pollutant such as the ammonia nitrogen of effective resolution process sludge release, organic matter.Profit
The covering material made from the inventive method can handle simultaneously sediment release the nutritive salt such as heavy metal, N, P and difficult degradation it is organic
Thing, and material usage is few, and easy for construction, cost is low.
To reach above-mentioned purpose, the present invention provides a kind of black smelly water river bottom mud restorative procedure, including is launched into river course
Covering material, form 1-10cm coating；
The covering material is to be prepared by above-mentioned black smelly water river bottom mud covering material preparation method.
Black-odor riverway remedying sludge method of the present invention, by adding covering material into river course, form coating and come to river
Road bed mud is repaired；Calcium, the magnesium elements being rich in using covering material in covering material, the phosphate reaction shape with sediment release
Into calcium phosphate, magnesium phosphate precipitation, phosphate content is reduced.It is porous, bigger than table, structural good using material, can be microorganism
Preferably breeding and growth place are provided, simultaneously containing oxygen slow release material, ammonia nitrogen, the organic matter of effective resolution process sludge release
Deng pollutant.Due to containing oxygen slow release material in covering material, oxygen slow release material be as parcel material PLA is by biological decomposition,
When oxygen slow release material and water reaction release oxygen, oxygen supply can be continued to microorganism, avoid the formation of anaerobism and amphimicrobian environment.
The covering material that the present invention obtains by carrying out high-temperature process, the absorption property on covering material surface is greatly improved,
There is good adsorption effect to sediment release heavy metal；And the nutritive salt such as heavy metal, N, P and difficulty of sediment release can be handled simultaneously
Degradation of organic substances.
Embodiment
Embodiment 1
The present embodiment provides a kind of black-odor riverway bed mud covering material preparation method, comprises the following steps：
(1) flyash of 100 mass parts and the PLA of 10 mass parts parcel calper calcium peroxide are mixed, with 90-150rpm
15-30min is stirred, oxygen slow release material surface is wrapped up by flyash, obtains the first mixing material；
(2) the first mixing material is mixed with silicate, 15-30min is stirred with 90-150rpm, obtains the second mixing material
Material；
(3) water and the stirring of the mass parts of water 40 are added in the second mixing material obtained into step (2), is mixed
Thing, honeycomb die extrusion forming is filled this blend into, obtain the firming body precursor of alveolate texture；
(4) the firming body precursor in step (3) is carried out in its natural state air-drying processing one week, obtains firming body；
(5) firming body obtained in step (4) is heated under the protection of nitrogen, is put into 350 DEG C of high temperature furnaces
Middle processing 2 hours, obtains covering material A after natural cooling.
Embodiment 2
(1) flyash of 100 mass parts and 10 mass parts PLAs are wrapped up into calper calcium peroxide and peromag mixture mixes
Close, 15-30min is stirred with 90-150rpm, oxygen slow release material surface is wrapped up by flyash, obtains the first mixing material；
(2) the first mixing material is mixed with the activated magnesia of 30 mass parts, 15-30min is stirred with 90-150rpm,
Obtain the second mixing material；
(3) water and the stirring of the mass parts of water 50 are added in the second mixing material obtained into step (2), is mixed
Thing, honeycomb die extrusion forming is filled this blend into, obtain the firming body precursor of alveolate texture；
(4) the firming body precursor in step (3) is carried out in its natural state air-drying processing one week, it is 10mm to obtain size
Firming body；
(5) firming body obtained in step (4) is heated under the protection of nitrogen, is put into 350 DEG C of high temperature furnaces
Middle processing 2 hours, obtains covering material B after natural cooling.
Comparative example 1
(1) silicate of the flyash of 100 mass parts and 30 mass parts is uniformly mixed to obtain mixing material；
(2) water of 40 mass parts is added in the mixing material into step (1), is sufficiently stirred, and loads honeycomb die extruding
Shaping, obtains cellular firming body precursor；
(3) the firming body precursor in step (2) is carried out in its natural state air-drying processing, obtains the honeybee that size is 10mm
Nest shape covering material C.
Comparative example 2
(1) flyash of 100 mass parts and the PLA of 10 mass parts are wrapped up to the mixing of calper calcium peroxide and peromag
Thing mixes, and oxygen slow release material surface is wrapped up by flyash, obtains the first mixing material；
(2) the first mixing material obtained in step (1) is mixed with the activated magnesia of 30 mass parts, it is mixed obtains second
Condensation material；
(3) water of 50 mass parts is added in the second mixing material obtained into step (2), is sufficiently stirred, and load honeybee
Snap has extrusion forming, obtains cellular firming body precursor；
(4) the firming body precursor in step (3) is carried out in its natural state air-drying processing, obtains the honeybee that size is 10mm
Nest shape covering material D.
Comparative example 3
(1) flyash of 100 mass parts and the PLA of 10 mass parts are wrapped up into calper calcium peroxide, is thoroughly mixed, makes
The surface of PLA parcel calper calcium peroxide is wrapped up by flyash, obtains the first mixing material；
(2) portland cement of the first mixing material and 5 mass parts that are obtained in step (1) is uniformly mixed, obtained
To the second mixing material；
(3) water of 40 mass parts is added in the second mixing material obtained into step (2), is sufficiently stirred, and load honeybee
Snap has extrusion forming, the firming body precursor of alveolate texture；
(4) the firming body precursor in step (3) is carried out in its natural state air-drying processing one week, it is 10mm to obtain size
Cellular firming body,；
(5) firming body obtained in step (4) is heated under the protection of nitrogen, is put into 350 DEG C of high temperature furnaces
Middle processing 2 hours, obtains covering material E after natural cooling.
The mechanical strength of above-mentioned several covering materials is more as shown in table 1：
Table 1
| Cover material A | Cover material B | Cover material C | Cover material D | Cover material E | |
| Intensity | ◎ | ◎ | ○ | ○ | X |
Wherein, ◎ represents that mechanical strength is good；Zero represents that mechanical strength is general；X represents that mechanical strength is bad.
Embodiment 3
Using covering material A to black smelly water river bottom mud reparative experiment；Obtain 20 kilograms of bed muds and record sludge and water quality
Parameter (table 2), sludge is poured into drum, the thickness about 40cm of mud, then pours into untainted clear water, water surface distance bed mud upper table
Face 40cm, after water is stable, surface uniformly dissipates covering material A2KG, forms coating of the thickness for 2cm or so, is observed after three months
Change of water quality, as a result it is recorded in table 3；Bed mud is taken simultaneously, is tested bed mud parameter, is shown in Table 4.
Embodiment 4
Using the same bed mud of embodiment 3 and experimental method, replace covering material A with covering material B, water quality is observed after three months
Change, is as a result recorded in table 3；Bed mud is taken simultaneously, is tested bed mud parameter, is shown in Table 4.
Reference examples 1
Using the same bed mud of embodiment 3 and experimental method, replace covering material A with covering material C, water quality is observed after three months
Change, is as a result recorded in table 3；Bed mud is taken simultaneously, is tested bed mud parameter, is shown in Table 4.
Reference examples 2
Using the same bed mud of embodiment 3 and experimental method, replace covering material A with covering material D, water quality is observed after three months
Change, is as a result recorded in table 3；Bed mud is taken simultaneously, is tested bed mud parameter, is shown in Table 4.
Reference examples 3
Using the same bed mud of embodiment 3 and experimental method, replace covering material A with covering material E, water quality is observed after three months
Change, is as a result recorded in table 3；Bed mud is taken simultaneously, is tested bed mud parameter, is shown in Table 4.
Reference examples 4
Using the same bed mud of embodiment 3 and experimental method, covering material is not added, change of water quality is observed after three months, is tied
Fruit is recorded in table 3；Bed mud is taken simultaneously, is tested bed mud parameter, is shown in Table 4.
Table 2
Table 3
Table 4
Result of the test shows：The present invention the smelly river bottom mud covering material of novel black have it is structural it is good, intensity is high, compares table
Greatly, the characteristics of excellent adsorption, be covered in black smelly bed mud top layer, at the same eliminate the nutritive salt such as the heavy metal of sediment release, N, P and
Hardly degraded organic substance, bed mud thickness are reduced, and water quality is improved for a long time, and the self-purification capacity of bed mud and water body is gradually recovered.And
The comparative example of non-invention whether pollutant process effect, or firming body intensity is not as patent protection material of the present invention
It is required that.
More than, only presently preferred embodiments of the present invention, but protection scope of the present invention is not limited thereto is any to be familiar with sheet
Those skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in should all be covered
Within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by the protection domain that claim is defined.
Claims (10)
1. a kind of black-odor riverway bed mud covering material preparation method, it is characterised in that comprise the following steps：
(1) flyash and oxygen slow release material are mixed and stirred for according to pre- ratio obtaining the first mixing material；
(2) the first mixing material is mixed with curing materials, and stirs and obtain the second mixing material；
(3) water is added in the second mixing material obtained into step (2) and is stirred, obtains mixture, mixture extruding is made
Grain obtains firming body precursor；
(4) the firming body precursor in step (3) is carried out to air-dried processing in its natural state and obtains firming body；
(5) firming body obtained in step (4) is heated under the protection of nitrogen, obtains covering material after natural cooling
Material.
2. black-odor riverway bed mud covering material preparation method as claimed in claim 1, it is characterised in that the matter of the flyash
It is 100 parts to measure part, and the mass parts of the oxygen slow release material are 5-10 parts, and the mass parts of the solidification material are 10-50 parts.
3. black-odor riverway bed mud covering material preparation method according to claim 1, it is characterised in that the quality of the water
For the 10%-50% of the second mixing material quality.
4. black-odor riverway bed mud covering material preparation method according to claim 1, it is characterised in that the oxygen slow release
Material is included by one or both of the calper calcium peroxide of poly-lactic acid material parcel or the peromag by poly-lactic acid material parcel.
5. black-odor riverway bed mud covering material preparation method according to claim 1, it is characterised in that the solidification material bag
Include any one or a few in cement, active calcium oxide, activated magnesia or waterglass.
6. black-odor riverway bed mud covering material preparation method according to claim 1, it is characterised in that before the firming body
Body is alveolate texture, and the firming body precursor is shaped as cube, spheroidal or column.
7. black-odor riverway bed mud covering material preparation method according to claim 1, it is characterised in that the firming body honeybee
The pore diameter range of nest shape structure is 1mm-30mm.
8. black-odor riverway bed mud covering material preparation method according to claim 1, it is characterised in that the step (4)
The middle time for carrying out air-drying processing is 6-10 days.
9. black-odor riverway bed mud covering material preparation method according to claim 1, it is characterised in that the step (5)
Middle heat treatment temperature is 300-500 DEG C；Heating treatment time is 2-3 hours.
10. a kind of black smelly water river bottom mud restorative procedure, it is characterised in that covering material is launched into river course, forms 1-10cm
Coating；
The covering material is as the black smelly water river bottom mud covering material preparation method system described in claim 1-9 any one
It is standby to obtain.
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Cited By (7)
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| CN108439524A (en) * | 2018-04-08 | 2018-08-24 | 安徽美自然环境科技有限公司 | One kind is for eutrophication water dephosphorization composite drug and preparation method thereof |
| CN109912143A (en) * | 2019-04-30 | 2019-06-21 | 哈尔滨工业大学（深圳） | A kind of original position black-odor riverway mud repair material and its potting and its application |
| CN110075787A (en) * | 2019-04-15 | 2019-08-02 | 贵州工程应用技术学院 | A kind of eutrophication basin bed mud control method |
| CN110184072A (en) * | 2019-05-22 | 2019-08-30 | 上海市政工程设计研究总院（集团）有限公司 | A kind of preparation method of calper calcium peroxide slow-release oxygen particle |
| CN110589949A (en) * | 2019-09-30 | 2019-12-20 | 扬州大学 | Preparation method of slow-release oxygen agent for improving black and odorous water body |
| CN110846046A (en) * | 2019-11-28 | 2020-02-28 | 浙江海洋大学 | Composite repairing agent for organic contaminated soil, preparation method and application thereof |
| CN115028343A (en) * | 2022-07-12 | 2022-09-09 | 南京江北新区公用控股集团有限公司 | Compound sludge conditioner, preparation method and application thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108439524A (en) * | 2018-04-08 | 2018-08-24 | 安徽美自然环境科技有限公司 | One kind is for eutrophication water dephosphorization composite drug and preparation method thereof |
| CN110075787A (en) * | 2019-04-15 | 2019-08-02 | 贵州工程应用技术学院 | A kind of eutrophication basin bed mud control method |
| CN109912143A (en) * | 2019-04-30 | 2019-06-21 | 哈尔滨工业大学（深圳） | A kind of original position black-odor riverway mud repair material and its potting and its application |
| CN109912143B (en) * | 2019-04-30 | 2022-04-15 | 哈尔滨工业大学（深圳） | In-situ black and odorous river sediment repair material, potted plant and application thereof |
| CN110184072A (en) * | 2019-05-22 | 2019-08-30 | 上海市政工程设计研究总院（集团）有限公司 | A kind of preparation method of calper calcium peroxide slow-release oxygen particle |
| CN110589949A (en) * | 2019-09-30 | 2019-12-20 | 扬州大学 | Preparation method of slow-release oxygen agent for improving black and odorous water body |
| CN110846046A (en) * | 2019-11-28 | 2020-02-28 | 浙江海洋大学 | Composite repairing agent for organic contaminated soil, preparation method and application thereof |
| CN115028343A (en) * | 2022-07-12 | 2022-09-09 | 南京江北新区公用控股集团有限公司 | Compound sludge conditioner, preparation method and application thereof |
| CN115028343B (en) * | 2022-07-12 | 2024-04-12 | 南京江北新区公用控股集团有限公司 | Compound sludge conditioner, preparation method and application thereof |
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Application publication date: 20180105 |