CN106186828B - The method for preparing square brick using retired wind electric blade composite - Google Patents
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- CN106186828B CN106186828B CN201610505545.7A CN201610505545A CN106186828B CN 106186828 B CN106186828 B CN 106186828B CN 201610505545 A CN201610505545 A CN 201610505545A CN 106186828 B CN106186828 B CN 106186828B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
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Abstract
The present invention relates to wind electricity blade technical fields, disclose a kind of method preparing square brick using retired wind electric blade composite, including step：The raw material of the top and bottom layer of square brick, middle layer is uniformly mixed respectively, cloth, vacuum are suppressed, cured to obtain square brick successively；The parts by weight of raw materials group of the top and bottom layer of the square brick becomes：Quartz sand：60-80 parts；The powder of retired wind electric blade composite：10-20 parts；Fire retardant A：0-10 parts；Fire retardant B：0-3 parts；Unsaturated polyester resin：7-11 parts；Curing agent：0-1 parts；Accelerating agent：0-1 parts；The parts by weight of raw materials group of the square brick middle layer becomes：The powder of retired wind electric blade composite：50-70 parts；Quartz sand：20-40 parts；Fire retardant B：0-5 parts；Unsaturated polyester resin：9-16 parts；Curing agent：0-1 parts；Accelerating agent：0-1 parts；Fire retardant A is：Magnesium hydroxide or active aluminium hydroxide fire retardant, fire retardant B are：QB-T01.The present invention realizes the regeneration of retired wind electric blade composite.
Description
Technical field
The present invention relates to wind electricity blade technical fields, more particularly to a kind of to be prepared extensively using retired wind electric blade composite
The method of field brick.
Background technology
Square brick has become the common structure of the road surfacings such as modern city road, square, residential quarter, tourist district
Brick beautifies city while ensuring traffic safety convenient.Wherein, artificial stone has height as novel artificial construction material
The advantages that intensity, high rigidity, high tenacity, anti-corrosion be anti-aging, radiationless, easy processing, analogy natural texture, in the application of square brick
It is more and more extensive.
In recent years, with the continuous reduction of traditional non-renewable energy resources such as coal, oil, natural gas, the exploitation of wind energy and profit
With the attention for increasingly obtaining people, it has also become one of the project of energy field most business promotion foreground at home and abroad develops
Rapidly.However the another side rapidly developed is then, as a large amount of same with thermosetting compound material wind electricity blades that early stage is on active service use year
Limit closes on (China in 1989~1992 years in Xinjiang Da Ban urban construction at first wind power plant), how to recycle and handle and is such big
The multiple material waste material of amount, will be as global a great problem.Processing mode traditional at present is to burn or bury, both processing
Mode is extensive and is harmful to.If ignoring what waste material was abandoned, strong influence will be caused to environment.Therefore, to retired wind-powered electricity generation leaf
Piece composite material is recycled, and in today of advocating environment protection, is had important practical significance.Retired wind electricity blade composite wood
Material can be handled effectively, and new raw material are regenerated as, and realize Circular Economy, will be collection social benefit and warp
The double causes received of benefit of helping and current urgent problem to be solved.
Invention content
The present invention proposes a kind of method preparing square brick using retired wind electric blade composite, solves the prior art
In the processing regeneration of retired wind electric blade composite the problem of.
A kind of method preparing square brick using retired wind electric blade composite of the present invention, includes the following steps：It will
The top and bottom layer of square brick, the raw material of middle layer are uniformly mixed respectively, cloth, vacuum compacting, solidification are described wide to obtain successively
Field brick；The parts by weight of raw materials group of the top and bottom layer of the square brick becomes：
The parts by weight of raw materials group of the square brick middle layer becomes：
The fire retardant A is：Magnesium hydroxide or active aluminium hydroxide fire retardant, the fire retardant B are：QB-T01.
Wherein, further include before being uniformly mixed the raw material of the top and bottom of square brick layer, middle layer respectively：By retired wind
The process of electric blade composite powder activation, specifically includes：Retired wind electric blade composite powder stirring is warming up to 60
It~140 DEG C, is added after activator activates 5~20min and discharges, obtain the activation powder of retired wind electric blade composite.
Wherein, the activator is：It is tri- azabicyclics of 1,5,7- [4.4.0] decyl- 5- alkene, zinc acetylacetonate, silane coupled
One or more mixing in agent.
Wherein, the mass ratio of the activator and retired wind electric blade composite powder is 0.15~0.6:100.
Wherein, the unsaturated polyester resin is quartz resin.
Wherein, the curing agent is cyclohexanone peroxide or methyl ethyl ketone peroxide, and the curing agent and the unsaturation are poly-
The mass ratio of ester resin is 0.5~1.5:100.
Wherein, the accelerating agent is：The mass ratio of cobalt naphthenate, the accelerating agent and the unsaturated polyester resin is
0.3~0.8:100.
Wherein, the grain size of the retired wind electric blade composite powder is 60~800 mesh.
Wherein, the quartz sand of top and bottom layer is 4~6 mesh, three kinds of mesh number quartz sands of 30~50 mesh and 100~200 mesh form,
Its mass ratio is 1:1:1, the granularity of the quartz sand of middle layer is 4~50 mesh.
In the activation powder preparation method of the retired wind electric blade composite of the present invention, retired wind electric blade composite
Waste material is that the key component (account for square brick weight 40% or more) of square brick is made into square brick, realizes retired wind-powered electricity generation
The regeneration of blade composite.
Specific implementation mode
The technical solution in the embodiment of the present invention is clearly and completely described below, it is clear that described embodiment is only
It is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
The every other embodiment that personnel are obtained without creative efforts, shall fall within the protection scope of the present invention.
A kind of method preparing square brick using retired wind electric blade composite of the present invention, includes the following steps：It will
The top and bottom layer of square brick, the raw material of middle layer are uniformly mixed respectively, cloth, vacuum compacting, solidification are described wide to obtain successively
Field brick；The parts by weight of raw materials group of the top and bottom layer of the square brick becomes：
The parts by weight of raw materials group of the square brick middle layer becomes：
Main material is thermosetting resin and glass fibre in retired wind electric blade composite powder, and wind electricity blade is compound
Material is after milling is handled, the short glass fiber comprising resin powder and surface attachment resin in material.Through overactivation
Powder is added in square brick, on the one hand can increase the binding force between square brick different material, on the other hand, staple glass fibre
Addition can improve the toughness of square brick.
Square brick provided by the invention is made of three-decker, is followed successively by upper layer, middle layer, cutting optimal, wherein up and down
The parts by weight of raw materials composition of face layer is identical.Square brick provided by the invention is integrated three-decker, is ensureing that square brick surface is hard
Under the premise of degree, wearability, improve the toughness and intensity of square brick, meanwhile, it realizes to retired wind electric blade composite
It recycles, a kind of new approach is provided for the processing of retired wind electricity blade.
The quartz sand of facing sections above and below heretofore described square brick, purpose are to ensure that square brick has good hardness
And crocking resistance.The quartz sand of the facing sections up and down is 4-6 mesh, 30-50 mesh, three kinds of mesh number quartz sands of 100-200 mesh
Composition, mass ratio 1:1:1；The quartz sand for square brick mid layer section, purpose are to ensure middle layer tool
There is good toughness, while impact resistance, quartz can increase middle layer intensity, the quartz sand of the mid layer section
Granularity be 4~50 mesh.
The unsaturated polyester resin is using 7982 quartz resin of sub- nation.
The fire retardant A is magnesium hydroxide or active aluminium hydroxide fire retardant.
The fire retardant B is QB-T01.
The curing agent is cyclohexanone peroxide or methyl ethyl ketone peroxide.The dosage of the curing agent is in addition to meeting raw material
Weight should also meet simultaneously：The mass ratio of curing agent and unsaturated polyester resin is 0.5~1.5:100.
The accelerating agent is cobalt naphthenate.Weight of the dosage of the accelerating agent in addition to meeting raw material, should also be same
When meet：The mass ratio of accelerating agent and unsaturated polyester resin is 0.3~0.8:100.
After retired wind electric blade composite waste material milling, the powder of gained is directly used in square brick provided by the invention
In, square brick of good performance cannot be obtained, needs to use after activating retired wind electric blade composite waste material.It is described
The preparation method of retired wind electric blade composite waste material activation powder is as follows：
After retired wind electric blade composite waste material is milled, activator is added and is activated at a certain temperature, obtains
The retired wind electric blade composite waste material activates powder.
The retired wind electric blade composite is unsaturated polyester (UP) base glass fibre composite material and epoxy resin-matrix glass
Glass fibrous composite.
The retired wind electric blade composite waste material powder should have suitable grain size, to ensure that retired wind electricity blade is multiple
Condensation material waste material powder can be fully uniformly mixed with remaining component in square brick, while be ensured in the cured mistake of square brick
Cheng Zhong, the ester bond having been cured in retired wind electric blade composite waste material is opened, with remaining component in square brick
Learn cross-linking reaction.
Preferably, the grain size of the retired wind electric blade composite waste material powder is 60~800 mesh, it is further excellent
The grain size of choosing, the retired wind electric blade composite waste material powder is 80~500 mesh, further preferably, the retired wind electricity blade
The grain size of composite material waste material powder is 80~300 mesh.
The effect of the activator is thermosetting in the retired wind electric blade composite waste material powder that will be had been cured
Property resin ester bond open, can with the component of remaining in square brick occur chemical crosslink reaction.The activator is 1,
Tri- azabicyclics of 5,7- [4.4.0] decyl- 5- alkene (TBD), zinc acetylacetonate, silane coupling agent are (such as：γ-methacryloxy
Propyl trimethoxy silicane, i.e. KH570) in one or more combinations.
The mass ratio of the activator and retired wind electric blade composite waste material powder is 0.15~0.6:100.Into one
Step is preferred, and the mass ratio of the activator and retired wind electric blade composite waste material powder is 0.3~0.5:100.
The activation temperature of the activator is 60~140 DEG C.Further preferably, the activation temperature of the activator be 70~
120℃。
Concrete operations operation when prepared by retired wind electric blade composite waste material activation powder is as follows：
Retired wind electric blade composite waste material is crushed and is milled successively, the narrow grain size for meeting Particle size requirements is obtained
It is distributed powder, then stirring is warming up to 70~110 DEG C, is added after activator activates 5~20min and discharges, obtains retired wind-powered electricity generation leaf
Piece composite material waste material activates powder.
The concrete operation method for making square brick provided by the invention is as follows：
Face layer raw material are weighed respectively according to the formula；Facing stone sand, retired wind electric blade composite are activated
Powder, fire retardant A, fire retardant B are uniformly mixed；It is put into after unsaturated polyester resin, curing agent, accelerating agent are stirred
It in the material mixed, is uniformly mixed again, obtains face layer material；Material is divided equally into two parts, respectively above and below layer material.
Middle layer raw material are weighed respectively according to the formula；By middle layer quartz sand, retired wind electric blade composite
Waste material activates powder, fire retardant B is uniformly mixed；It is put into after unsaturated polyester resin, curing agent, accelerating agent are stirred
In the material mixed, in being uniformly mixed again, middle layer material is obtained；
By cutting optimal, the material of middle layer, upper layer, successively tile onto mold.After the completion of cloth, vacuumized,
Vibrations pressurization.The square brick suppressed is demoulded, solidification.Obtain three-decker square brick.
The present invention (accounts for square brick weight using retired wind electric blade composite waste material as the key component of square brick
40% or more), have many advantages, such as that rub resistance, impact resistance, density is small, water absorption rate is low, fire-retardant good, it is wide to can be widely applied to paving
Field, airport, station and pavement, market prospects are long-range.
Embodiment 1
It, will be upper using the not activated retired wind electric blade composite waste material of unsaturated-resin base as square brick raw material
Cutting optimal quartz sand, retired wind electric blade composite waste material powder, fire retardant A, fire retardant B are placed in No. 1 batch mixer and mix,
Stir 10min；It is put into after unsaturated polyester resin, curing agent, accelerating agent are stirred in No. 1 blender；Stirring
10min obtains face layer material；Material is divided equally into two parts, respectively above and below layer material.
The parts by weight of raw materials group of the top and bottom layer of square brick becomes：
Middle layer raw material are weighed respectively according to the formula；Facing stone sand, retired wind electric blade composite are given up
Feed powder material, fire retardant B are placed in No. 2 batch mixers and mix, and stir 10min；Unsaturated polyester resin, curing agent, accelerating agent are filled
Divide after stirring evenly and is put into No. 2 blenders；10min is stirred, middle layer material is obtained；
The parts by weight of raw materials group of the square brick middle layer becomes：
By cutting optimal, the material of middle layer, upper layer, successively tile onto mold.After the completion of cloth, vacuumized,
Vibrations pressurization.After shake table jolt ramming, vacuum compacting is carried out.Vacuum degree control in vacuum vibration formation pressing machine is-
0.08Mp；Working frequency is 50Hz；Pressing time 8min.The square brick suppressed is demoulded, is put into 140 DEG C of curing oven solid
Change 8h.Obtain three-decker square brick.
Embodiment 2
Using the not activated retired wind electric blade composite waste material of epoxy resin-matrix as square brick raw material；By face layer
Quartz sand, retired wind electric blade composite waste material powder, fire retardant A, fire retardant B are placed in No. 1 batch mixer and mix, and stir
10min；It is put into after unsaturated polyester resin, curing agent, accelerating agent are stirred in No. 1 blender；10min is stirred,
The face of obtaining layer material；Material is divided equally into two parts, respectively above and below layer material.
The parts by weight of raw materials group of the top and bottom layer of square brick becomes：
Middle layer raw material are weighed respectively according to the formula；Facing stone sand, retired wind electric blade composite are given up
Feed powder material, fire retardant B are placed in No. 2 batch mixers and mix, and stir 10min；Unsaturated polyester resin, curing agent, accelerating agent are filled
Divide after stirring evenly and is put into No. 2 blenders；10min is stirred, middle layer material is obtained；
The parts by weight of raw materials group of the square brick middle layer becomes：
By cutting optimal, the material of middle layer, upper layer, successively tile onto mold.After the completion of cloth, vacuumized,
Vibrations pressurization.After shake table jolt ramming, vacuum compacting is carried out.Vacuum degree control in vacuum vibration formation pressing machine is-
0.08Mp；Working frequency is 50Hz；Pressing time 8min.The square brick suppressed is demoulded, is put into 140 DEG C of curing oven solid
Change 8h.Obtain three-decker square brick.
Embodiment 3
The epoxy resin-matrix glass fiber compound material waste material recycled after wind electricity blade is dismembered is crushed, is ground successively
120 mesh narrow particle diameter distribution powders are made in powder, and the merging high speed mixer stirring of 5kg powders is warming up to 100 DEG C, 9g acetyl is added
It discharges after acetone zinc and 15g silane coupling agent KH570 activators activation 15min, obtains retired wind electric blade composite activation
Powder.
Face layer raw material are weighed respectively according to the formula；By top and bottom layer quartz sand, retired wind electric blade composite
Activation powder, fire retardant A, fire retardant B are placed in No. 1 batch mixer and mix, and stir 10min；By unsaturated polyester resin, solidification
Agent, accelerating agent are put into after stirring in No. 1 blender；10min is stirred, face layer material is obtained；Material is divided equally two parts, point
It Wei not above and below layer material.
The parts by weight of raw materials group of the top and bottom layer of square brick becomes：
Middle layer raw material are weighed respectively according to formula；By middle layer quartz sand, retired wind electric blade composite waste material
Activation powder, fire retardant B are placed in No. 2 batch mixers and mix, and stir 10min；By unsaturated polyester resin, curing agent, accelerating agent
It is put into after stirring in No. 2 blenders；10min is stirred, middle layer material is obtained；
The parts by weight of raw materials group of the square brick middle layer becomes：
By cutting optimal, the material of middle layer, upper layer, successively tile onto mold.After the completion of cloth, vacuumized,
Vibrations pressurization.After shake table jolt ramming, vacuum compacting is carried out.Vacuum degree control in vacuum vibration formation pressing machine is-
0.08Mp；Working frequency is 50Hz；Pressing time 8min.The square brick suppressed is demoulded, is put into 140 DEG C of curing oven solid
Change 8h.Obtain three-decker square brick.
Embodiment 4
The epoxy resin-matrix glass fiber compound material waste material recycled after wind electricity blade is dismembered is crushed, is ground successively
120 mesh narrow particle diameter distribution powders are made in powder, and the merging high speed mixer stirring of 5kg powders is warming up to 100 DEG C, 9g acetyl is added
It discharges after acetone zinc and 15g silane coupling agent KH570 activators activation 15min, obtains retired wind electric blade composite activation
Powder.
Face layer raw material are weighed respectively according to the formula；By top and bottom layer quartz sand, retired wind electric blade composite
Waste material activation powder, fire retardant A, fire retardant B are placed in No. 1 batch mixer and mix, and stir 10min；By unsaturated polyester resin, admittedly
Agent, accelerating agent are put into after stirring in No. 1 blender；10min is stirred, face layer material is obtained；Material is divided equally two parts,
Respectively above and below layer material.
The parts by weight of raw materials group of the top and bottom layer of square brick becomes：
Middle layer raw material are weighed respectively according to the formula；By middle layer quartz sand, retired wind electric blade composite
Waste material activation powder, fire retardant B are placed in No. 2 batch mixers and mix, and stir 10min；By unsaturated polyester resin, curing agent, rush
It is put into after being stirred into agent in No. 2 blenders；10min is stirred, middle layer material is obtained；
The parts by weight of raw materials group of the square brick middle layer becomes：
By cutting optimal, the material of middle layer, upper layer, successively tile onto mold.After the completion of cloth, vacuumized,
Vibrations pressurization.After shake table jolt ramming, vacuum compacting is carried out.Vacuum degree control in vacuum vibration formation pressing machine is-
0.08Mp；Working frequency is 50Hz；Pressing time 8min.The square brick suppressed is demoulded, is put into 140 DEG C of curing oven solid
Change 8h.Obtain three-decker square brick.
Embodiment 5
The epoxy resin-matrix glass fiber compound material waste material recycled after wind electricity blade is dismembered is crushed, is ground successively
180 mesh narrow particle diameter distribution powders are made in powder.The merging high speed mixer stirring of 5kg powders is warming up to 70 DEG C, is added 15g1,5,
It discharges after tri- azabicyclics of 7- [4.4.0] decyl- 5- alkene (TBD) and 9g KH570 activators activation 15min, obtains retired wind-powered electricity generation leaf
Piece composite material waste material activates powder.
Face layer raw material are weighed respectively according to the formula；By top and bottom layer quartz sand, retired wind electric blade composite
Waste material activation powder, fire retardant A, fire retardant B are placed in No. 1 batch mixer and mix, and stir 10min；By unsaturated polyester resin, admittedly
Agent, accelerating agent are put into after stirring in No. 1 blender；10min is stirred, face layer material is obtained；Material is divided equally two parts,
Respectively above and below layer material.
The parts by weight of raw materials group of the top and bottom layer of square brick becomes：
Middle layer raw material are weighed respectively according to the formula；By middle layer quartz sand, retired wind electric blade composite
Waste material activation powder, fire retardant B are placed in No. 2 batch mixers and mix, and stir 10min；By unsaturated polyester resin, curing agent, rush
It is put into after being stirred into agent in No. 2 blenders；10min is stirred, middle layer material is obtained；
The parts by weight of raw materials group of the square brick middle layer becomes：
By cutting optimal, the material of middle layer, upper layer, successively tile onto mold.After the completion of cloth, vacuumized,
Vibrations pressurization.After shake table jolt ramming, vacuum compacting is carried out.Vacuum degree control in vacuum vibration formation pressing machine is-
0.08Mp；Working frequency is 50Hz；Pressing time 8min.The square brick suppressed is demoulded, is put into 140 DEG C of curing oven solid
Change 8h.Obtain three-decker square brick.
Performance characterization
The test performance for the square brick that Examples 1 to 5 is prepared is as shown in the table：
It can be seen that square brick is in compressive strength and anti-impact made of retired wind electric blade composite powder after overactivation
Be substantially better than in terms of hitting property it is not activated after retired wind electric blade composite powder made of square brick.
Standard based on the performance test results in table is respectively：
Density is with reference to U.S. ASTM C97；
Water absorption rate is with reference to JC/T 908-2013, GB/T3810.3-2006；
Mohs' hardness detection is with reference to JC/T 908-2013；
Wearability is with reference to JC/T 908-2013；
Compressive strength is with reference to JC/T 908-2013；
Ball falling impact is with reference to JC/T 908-2013；
Flame retardant property test is with reference to JC/T 908-2013.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of method preparing square brick using retired wind electric blade composite, which is characterized in that include the following steps：It will
The top and bottom layer of square brick, the raw material of middle layer are uniformly mixed respectively, cloth, vacuum compacting, solidification are described wide to obtain successively
Field brick；The parts by weight of raw materials group of the top and bottom layer of the square brick becomes：
The parts by weight of raw materials group of the square brick middle layer becomes：
The fire retardant A is：Magnesium hydroxide or active aluminium hydroxide fire retardant, the fire retardant B are：QB-T01；
The curing agent is cyclohexanone peroxide or methyl ethyl ketone peroxide, the matter of the curing agent and the unsaturated polyester resin
Amount is than being 0.5~1.5:100；
The accelerating agent is：The mass ratio of cobalt naphthenate, the accelerating agent and the unsaturated polyester resin is 0.3~0.8:
100；
The grain size of the retired wind electric blade composite powder is 60~800 mesh；
The quartz sand of top and bottom layer is three kinds of 4~6 mesh, 30~50 mesh and 100~200 mesh mesh number quartz sand compositions, mass ratio
Example is 1:1:1, the granularity of the quartz sand of middle layer is 4~50 mesh.
2. the method for preparing square brick using retired wind electric blade composite as described in claim 1, which is characterized in that
Further include before the raw material of the top and bottom layer of square brick, middle layer is uniformly mixed respectively：By retired wind electric blade composite
The process of powder activation, specifically includes：Retired wind electric blade composite powder stirring is warming up to 60~140 DEG C, is added and lives
Agent discharges after activating 5~20min, obtains the activation powder of retired wind electric blade composite.
3. the method for preparing square brick using retired wind electric blade composite as claimed in claim 2, which is characterized in that institute
Stating activator is：It is one or more in tri- azabicyclics of 1,5,7- [4.4.0] decyl- 5- alkene, zinc acetylacetonate, silane coupling agent
Mixing.
4. the method for preparing square brick using retired wind electric blade composite as claimed in claim 2, which is characterized in that institute
The mass ratio for stating activator and retired wind electric blade composite powder is 0.15~0.6:100.
5. the method for preparing square brick using retired wind electric blade composite as described in claim 1, which is characterized in that institute
It is quartz resin to state unsaturated polyester resin.
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| CN114605770B (en) * | 2022-03-28 | 2023-05-09 | 吉林重通成飞新材料股份公司 | Polycyclopentadiene fiber composite material and preparation method thereof |
| CN114605597B (en) * | 2022-03-28 | 2023-06-02 | 吉林重通成飞新材料股份公司 | Poly (cyclopentadiene) composite material with post-curing and high surface activity and preparation method thereof |
| CN115536414A (en) * | 2022-10-17 | 2022-12-30 | 中国科学技术大学 | Method for recycling retired wind driven generator blades |
| CN115611609B (en) * | 2022-11-14 | 2023-03-10 | 国能龙源环保有限公司 | Method for preparing water permeable brick by utilizing waste wind power blades |
| CN116813993B (en) * | 2023-08-28 | 2023-12-29 | 国能联合动力技术(保定)有限公司 | Water loss resistant asphalt modifier and preparation method and application thereof |
| CN117567113B (en) * | 2024-01-19 | 2024-03-12 | 河北省多基复合材料产业技术研究院有限公司 | Process for preparing modified concrete by using retired wind driven generator blades |
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| CN105563694A (en) * | 2016-02-25 | 2016-05-11 | 吉林重通成飞新材料股份公司 | Wind power blade recovery treatment method |
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