CN106167311A - A kind of technique utilizing slag processing rainwater - Google Patents
A kind of technique utilizing slag processing rainwater Download PDFInfo
- Publication number
- CN106167311A CN106167311A CN201610592883.9A CN201610592883A CN106167311A CN 106167311 A CN106167311 A CN 106167311A CN 201610592883 A CN201610592883 A CN 201610592883A CN 106167311 A CN106167311 A CN 106167311A
- Authority
- CN
- China
- Prior art keywords
- rainwater
- slag
- passed
- technique
- settlement separate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002893 slag Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 44
- 239000000706 filtrate Substances 0.000 claims abstract description 25
- 238000001914 filtration Methods 0.000 claims abstract description 12
- 230000001112 coagulating effect Effects 0.000 claims abstract description 9
- 238000001556 precipitation Methods 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000008187 granular material Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000004503 fine granule Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000006386 neutralization reaction Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 abstract description 3
- 239000013589 supplement Substances 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 9
- 239000000292 calcium oxide Substances 0.000 description 8
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 8
- 238000005189 flocculation Methods 0.000 description 6
- 230000016615 flocculation Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000000395 magnesium oxide Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000000844 anti-bacterial effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 241000167880 Hirundinidae Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006253 efflorescence Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 235000013980 iron oxide Nutrition 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/02—Methods or installations for obtaining or collecting drinking water or tap water from rain-water
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/06—Gully gratings
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- 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
- C02F2103/001—Runoff or storm water
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/108—Rainwater harvesting
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Environmental & Geological Engineering (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
Abstract
The invention discloses a kind of technique utilizing slag processing rainwater.This technique includes: (1) collect rainwater through grid filtration, be passed through buffer-precipitation pond is carried out settlement separate；(2) the filtrate bed made through hot application method slag neutralizes, replaces, flocculates；(3) it is passed through coagulating basin and again carries out settlement separate；(4) boil in a covered pot over a slow fire, through heat, the filtrate bed filtration that method slag is made.Rainwater after process can be used for view, afforest, the industrial or agricultural such as cooling supplements water.
Description
Technical field
The present invention relates to a kind of technique utilizing slag processing rainwater, belong to comprehensive utilization of resources field.
Background technology
Slag refers to the waste residue of steel industry, and its discharge capacity is about the 10-20% of output of steel.The slag accumulated for many years is own
Through becoming environment one evil, it is stacked and not only occupies a large amount of valuable land resource, and due to the alkali such as CaO, MgO in slag
Property material is more, and the growth to groundwater quality and plant causes sizable harm, and surrounding also causes the biggest dirt
Dye, produces serious environment hidden danger, the Sustainable Healthy Development of steel industry is brought adverse effect.
The main chemical compositions of slag is CaO, SiO2、FeO、Fe2O3, MgO and free CaO etc..Iron oxides in slag
With FeO and Fe2O3Form exists simultaneously, based on FeO, and also part free state ferrum.
According to the processing mode of slag, slag can be divided into hot application method slag and heat to boil in a covered pot over a slow fire method slag.Hot application method slag contains
The free state calcium oxide of higher proportion and ferrum, free state calcium oxide content is higher, typically can reach 6-18%, long-term storage
Slag, its free calcium oxide, content of magnesia have and to a certain degree decline, but content is still more than 5%.The stewing method slag of heat is because of steam
Inside infiltration slag, clear up free CaO and MgO, stabilize after slag efflorescence.
In recent years, the quick increase of impermeability path area in city so that the part that rainwater permeates the ground reduces, and causes
Rainfall runoff is made to be gradually increased.When rainwater forms runoff, earth's surface and pipeline deposit are washed away, substantial amounts of pollutant can be carried
Enter receiving water body, make runoff pollution load be multiplied, and rainwater runoff pollution belongs to non-point pollution, have sudden
And noncontinuity.
Along with urban development, rainwater increasingly comes into one's own as the resource of a kind of preciousness.Being proposed for of sponge city
Collection and the process of water propose higher requirement, owing to ground is washed away by rainwater, because it flows through the difference on road surface, cause rainwater
Containing substantial amounts of float, colloidal substance and certain heavy metal ion, thus limit the use field of rainwater.
Summary of the invention
For the problems referred to above, the invention provides and a kind of utilize slag to process the technique of rainwater, early-stage rainwater is carried out
The process rationalized, makes rainwater be reused, and reduces slag simultaneously and piles up, reduces ambient pressure.
A kind of technique utilizing slag processing rainwater, it mainly comprises the following steps:
(1) rainwater is collected by pipe network, and grid is set in pipeline opening, for removing the big solid particle foreign material in rainwater
After, it being passed through and buffer-precipitation pond is carried out settlement separate, the time of staying is 30～60s；
(2) rainwater after settlement separate is passed through neutralization reaction tank, in it, is provided with the filtrate bed made with hot application method slag, steel
Slag particle footpath is at 0.5 ~ 1.2mm, and grating is 1.45～1.85, and filtrate bed height is 200～1000mm；Utilize in hot application method slag
Free state calcium oxide, magnesium oxide, ferrum oxide and free iron etc., be neutralized (the H in rainwater to rainwater+Can be with the trip in slag
Occur to neutralize reaction from alkaline metal oxide, the when that alkaline metal oxide being dissolved in water, also can produce OH-), displacement (Fe meeting
With the H in rainwater+Occur displacement reaction generate Fe ion), flocculation (Fe ion meeting and OH-Generate Fe (OH)3, Fe (OH)3Permissible
Certain flocculation is played as flocculant) process, make the heavy metal in rainwater and colloidal substance be separated；
(3) rainwater after step (2) being processed, is passed through in coagulating basin stop 15～120min and again carries out settlement separate, if place
The rainwater (such as road runoff) that reason suspension content is higher, coagulating basin can effectively remove organic pollution materials and float；
(4) rainwater in coagulating basin is passed through filtering settling pond, is provided with in it and boils in a covered pot over a slow fire, with heat, the filtrate bed that method slag is made, use heat
Stewing method slag, as filtrate bed, by controlling the grating of different-grain diameter slag, carries out filtration treatment to rainwater；During filtration, in filter
Forming filter membrane in the lower filter material layer of bed surface, in filter membrane, microorganism decapacitation directly swallows and can also secret out of cohesion outside antibacterial
Enzyme, therefore preferably can not only can remove antibacterial, pathogenic bacteria by more clear clean water treatment to delivery turbidity close to zero degree, smell and taste, colourity
With part BOD and COD；
(5) rainwater after filtering precipitation is passed into reserve pool, for view, afforest, the industrial or agricultural such as cooling supplements water.
Grid described in step (1) is coarse rack, middle grid, the one or more combination of fine fack, 0.5mm≤fine fack
Lattice distance between gates≤5mm, 5mm ＜ coarse rack grid spacing≤10mm in grid spacing≤2mm, 2mm ＜.
Step (4) uses the filtrate bed that the stewing method slag of heat is made, and uses the steel slag particle of different-grain diameter to carry out mix and match,
1mm≤fine grained particle diameter≤5mm, level fits over 2.55～2.65,5mm ＜ coarse granule particle diameter≤20mm, and level fits over 1.5～1.75,
Large or fine granule proportioning is 1.5～5, and filtrate bed height is 200～1000mm.
Advantages of the present invention and good effect be:
(1) slag reuse dealkalize, it is achieved the treatment of wastes with processes of wastes against one another, reduces solid waste land occupation and cost of disposal；
(2) collection processes rainwater, reclaims rainwater resource；
(3) simple process, equipment is simple to operation, has good economy.
Accompanying drawing explanation
Fig. 1 is present invention process schematic flow sheet.
Detailed description of the invention
Embodiment 1
Collect certain residential quarter roofing and the rainwater of road, use 5.5mm coarse rack and 1.5mm fine fack to intercept, remove big
After granule foreign material, being passed into by rainwater in buffer-precipitation pond, carry out settlement separate, the time of staying is 30s；Then rainwater is led to
Enter and neutralize in reaction tank, the filtrate bed be made up of hot application method slag (slag particle diameter=0.5mm, grating=1.55, filtrate bed height=
350mm) rainwater is neutralized, replaces and flocculation treatment, make the heavy metal in rainwater and colloidal substance separate；Through wadding
Rainwater after Ning is passed in coagulating basin, stops 40min and carries out settlement separate, is passed through filtering settling pond afterwards, boils in a covered pot over a slow fire method via heat
The filtrate bed that slag is constituted filters (fine grained particle diameter=3mm, grating=2.58, coarse granule particle diameter=12mm, grating=1.5, thickness
Grain proportioning=2.2, filtrate bed height=350mm), eventually entering into rainwater reserve pool, the rainwater of recovery is used for residential quarters greening, flushing
Road etc..
Embodiment 2
Collect storm sewer outlet on certain plant area roof and 2mm fine fack is set, rainwater is intercepted, removes bulky grain foreign material；
Then passing to underground buffer sedimentation tank, carry out settlement separate, the time of staying is 45s；Then pass to neutralize reaction tank, by hot application method
Rainwater is neutralized, puts by the filtrate bed (slag particle diameter=0.8mm, grating=1.45, filtrate bed height=200mm) that slag is made
Change and flocculation treatment, make the heavy metal in rainwater and colloidal substance separate；Rainwater after flocculation is passed into coagulating basin
In, stopping 15min and carry out settlement separate, be passed through filtering settling pond afterwards, the filtrate bed boiling in a covered pot over a slow fire method slag composition via heat filters (thin
Grain diameter=1mm, grating=2.55, coarse granule particle diameter=6mm, grating=1.62, large or fine granule proportioning=1.5, filtrate bed height=
200mm), eventually entering into rainwater reserve pool, the rainwater of recovery is used for plant area's greening, industry cooling etc..
Embodiment 3
Certain square and the rainwater in periphery street thereof, after pipe network is collected, blocked by grid in 6.8mm coarse rack and 2.5mm
Cutting, enter buffer-precipitation pond, carry out settlement separate, the time of staying is 60s；Then rainwater is passed through neutralization reaction tank, by hot application
Rainwater is neutralized, puts by the filtrate (slag particle diameter=1.2mm, grating=1.85, filtrate bed height=1000mm) that method slag is made
Changing and flocculate, then the rainwater after flocculation is passed through coagulating basin, hydraulic detention time 120min carries out settlement separate, was passed through afterwards
Filter sedimentation tank, via heat boil in a covered pot over a slow fire method slag constitute filtrate bed filter (fine grained particle diameter=5mm, grating=2.65, coarse granule particle diameter=
20mm, grating=1.75, large or fine granule proportioning=5, filtrate bed height=1000mm), eventually enter into rainwater reserve pool, be used for afforesting,
Square Central fountain etc..
Claims (6)
1. the technique utilizing slag processing rainwater, its step includes:
(1) collect rainwater, after grid filtration, be passed through buffer-precipitation pond is carried out settlement separate；
(2) rainwater after settlement separate is passed through neutralization reaction tank, neutralizes in reaction tank to be provided with and make with hot application method slag
Filtrate bed, is neutralized rainwater, replaces, flocculates；
(3) by step (2) process after rainwater, be passed through in coagulating basin again carry out settlement separate；
(4) rainwater after step (3) being processed is passed through filtering settling pond, is provided with and boils in a covered pot over a slow fire what method slag was made by heat in filtering settling pond
Filtrate bed, is passed through reserve pool after filtration.
Technique the most according to claim 1, it is characterised in that described grid is coarse rack, middle grid, the one of fine fack
Or several combination, lattice distance between gates≤5mm, 5mm ＜ coarse rack grid spacing in 0.5mm≤fine fack grid spacing≤2mm, 2mm ＜
≤10mm。
Technique the most according to claim 1, it is characterised in that when step (1) rainwater is settlement separate in buffer-precipitation pond
Between be 30～60s.
Technique the most according to claim 1, it is characterised in that the filtrate bed made with hot application method slag in step (2), steel
Slag particle footpath is 0.5 ~ 1.2mm, and grating is 1.45～1.85, and filtrate bed height is 200 ~ 1000mm.
Technique the most according to claim 1, it is characterised in that step (3) rainwater settlement separate time in coagulating basin is
15～120min.
Technique the most according to claim 1, it is characterised in that step (4) uses the filtrate bed that the stewing method slag of heat is made, and makes
Carrying out mix and match, 1mm≤fine grained particle diameter≤5mm with the steel slag particle of different-grain diameter, grating is 2.55～2.65,5mm ＜
Coarse granule particle diameter≤20mm, grating is 1.5～1.75, and large or fine granule proportioning is 1.5～5, and filter bed height is 200～1000mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610592883.9A CN106167311B (en) | 2016-07-26 | 2016-07-26 | A kind of technique using slag processing rainwater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610592883.9A CN106167311B (en) | 2016-07-26 | 2016-07-26 | A kind of technique using slag processing rainwater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106167311A true CN106167311A (en) | 2016-11-30 |
| CN106167311B CN106167311B (en) | 2019-02-05 |
Family
ID=58065596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610592883.9A Active CN106167311B (en) | 2016-07-26 | 2016-07-26 | A kind of technique using slag processing rainwater |
Country Status (1)
| Country | Link |
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| CN (1) | CN106167311B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108862945A (en) * | 2018-09-21 | 2018-11-23 | 江苏百海环保科技有限公司 | A kind of urban rainwater collection cleansing and recycling system |
| CN109372063A (en) * | 2018-12-14 | 2019-02-22 | 青岛润通源水务工程设备有限责任公司 | A kind of no negative pressure pipe network pressurizing current stabilization supply equipment |
| CN109574270A (en) * | 2018-12-14 | 2019-04-05 | 博大绿泽生态建设集团有限公司 | A method of utilizing active carbon and slag processing rainwater |
| CN112723554A (en) * | 2020-11-05 | 2021-04-30 | 云南锦淮环保科技有限公司 | Composite biological water purifying agent and preparation method thereof |
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| CN201254511Y (en) * | 2008-06-20 | 2009-06-10 | 天津科技大学 | Rainwater purification apparatus |
| CN203451288U (en) * | 2013-08-30 | 2014-02-26 | 武汉大学 | Compound ecological ditch for treating surface source sewage in village |
| CN104445824A (en) * | 2014-12-08 | 2015-03-25 | 北京东方园林股份有限公司 | System and method for purifying water area surface source pollution |
| CN205222960U (en) * | 2015-12-19 | 2016-05-11 | 长安大学 | Residence community rainwater processing system |
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| JP2006026593A (en) * | 2004-07-20 | 2006-02-02 | Ooshima Design Sekkei:Kk | Method for treating rain water or thawed-snow water |
| CN201254511Y (en) * | 2008-06-20 | 2009-06-10 | 天津科技大学 | Rainwater purification apparatus |
| CN203451288U (en) * | 2013-08-30 | 2014-02-26 | 武汉大学 | Compound ecological ditch for treating surface source sewage in village |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108862945A (en) * | 2018-09-21 | 2018-11-23 | 江苏百海环保科技有限公司 | A kind of urban rainwater collection cleansing and recycling system |
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| CN109372063A (en) * | 2018-12-14 | 2019-02-22 | 青岛润通源水务工程设备有限责任公司 | A kind of no negative pressure pipe network pressurizing current stabilization supply equipment |
| CN109574270A (en) * | 2018-12-14 | 2019-04-05 | 博大绿泽生态建设集团有限公司 | A method of utilizing active carbon and slag processing rainwater |
| CN112723554A (en) * | 2020-11-05 | 2021-04-30 | 云南锦淮环保科技有限公司 | Composite biological water purifying agent and preparation method thereof |
| CN112723554B (en) * | 2020-11-05 | 2023-02-28 | 云南锦淮环保科技有限公司 | Composite biological water purifying agent and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106167311B (en) | 2019-02-05 |
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