CN106395935B - A kind of microcystis waterbloom Processing tecchnics by algae and bed mud passivation heavy in high alumina cement-staple fiber system-based - Google Patents
A kind of microcystis waterbloom Processing tecchnics by algae and bed mud passivation heavy in high alumina cement-staple fiber system-based Download PDFInfo
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- CN106395935B CN106395935B CN201611015229.8A CN201611015229A CN106395935B CN 106395935 B CN106395935 B CN 106395935B CN 201611015229 A CN201611015229 A CN 201611015229A CN 106395935 B CN106395935 B CN 106395935B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
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- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The present invention relates to a kind of microcystis waterbloom Processing tecchnics by algae and bed mud passivation heavy in high alumina cement-staple fiber system-based, mixture is thrown in water body to be processed with the dosage of 0.2-10 kilograms/every square metre water area, the mixture includes high alumina cement, auxiliary cationic flocculant and staple fiber, by weight, in every 100 parts of high alumina cements, the parts by weight of cationic flocculant are assisted to be greater than 0 part and at 10 parts hereinafter, the parts by weight of staple fiber are greater than 0 part and at 20 parts or less.Microcystis waterbloom Processing tecchnics of the invention, it is provided simultaneously with the ability of bed mud closing passivation, and capture cyanobacteria and cyanobacteria decomposition product --- the ability of phosphorus, organic matter, the addition of staple fiber can substantially reinforce gelinite wind and wave resistance intensity, and solidification material is greatly improved in the intensity of bed mud, water body can be controlled steadily in the long term, the present invention has the advantages that easy to operate, environmental risk is small.
Description
Technical field
The present invention relates to a kind of microcystis waterblooms by algae and bed mud passivation heavy in high alumina cement-staple fiber system-based
Processing tecchnics.
Background technique
Since the 1940's, there is microcystis waterbloom problem successively in modern age in world wide, from nineteen forty-seven U.S. Ah
Vigorous Ka Hu, the Constance of nineteen fifty, Wuhan East Lake, the Taihu Lake in generation nineteen ninety etc. to domestic the 1970's are typical generations
Table.Its main inducing is the increase of city domestic sewage and industry, water eutrophication is caused, thus coastal seawater and fresh water lake
Wawter bloom phenomenon frequently occurs in pool, so that becoming worldwide public hazards.
The related data of practice is cultivated according to cyanobacteria in the analysis of many algal bloom events and laboratory, it is considered that blue
The material base of alga eruption is water eutrophication, i.e. enrichment of the limitative nutrient in water body, the most key
It is nitrogen, phosphorus and its ratio (the nitrogen phosphorus including organic and inorganic states).Iron and micronutrient boron, manganese, zinc, copper, cobalt, calcium, magnesium, molybdenum
The equal organic substances such as elements and carbohydrate, such as part microorganism/metabolin can also become certain wawter bloom phenomenons and break out
The reason of.Meteorological and physical and chemical factor, such as light, heat, wind, rain are an important factor for influencing cyanobacterial bloom outburst.Between species
The interactions such as competition and consumer also will affect the proliferation and algal bloom of cyanobacteria.
There are some now raw cyanobacterias in illumination condition but H2The photosynthetic work of non-oxygen release can be carried out in S anaerobic environment abundant
With, sulphur and organic matter are generated, many cyanobacterias carry out heterotrophic growth using organic compound in a dark environment under experiment condition, but
The heterotrophic growth of cyanobacteria in general is slower than photoautotrophy growth.Feature in the breeding of Microcystis aeruginosa tool and spectrum utilization scope, tool
Body shows themselves in that (one) under general light intensity and light quality, and the photosynthetic efficiency of Microcystis aeruginosa is lower than diatom, green alga etc., thus to CO2And nothing
The intake ability of machine mineral is relatively weak, shows as disadvantage population；But under dim light or strong light, Microcystis aeruginosa traps pigment because of its light
Different and absorbent optical wavelength ranges it is wider, improve its competitive advantage, at the same adapt to again high light intensity ultraviolet light it is dry
It disturbs, good stress resistance is more adaptable.(2) similar with bacterium in micro-capsule algal structure, it is mainly bred in a manner of binary fission, in temperature
In the case that degree is suitable for, reproduction speed is much larger than diatom, green alga etc., easily shoot up in of short duration preference temperature for
Dominant population, to obtain to the advantage in the competition of same ecological niche.(3) Microcystis aeruginosa has pseudo- vacuole structure, has autonomous floating
It is preferential to intercept and utilize luminous energy so as to be enriched in water surface rapidly with the ability of sinking, while it is attached also to sink down into bed mud
It is close to obtain nutriment, therefore Microcystis aeruginosa population expands rapidly as sociales and keeps its superiority.
It is analyzed from time scale, the behavior expression of cyanobacteria is periodic feature, i.e., the periodicity that annual 5-9 month occurs
Feature.In each period, cyanobacteria is proliferated in water body and breaks out continuous process, is apparently showing as certain stage.
Specifically, the generation of cyanobacterial bloom can be divided into four-stage, i.e. suspend mode, induction, proliferation, aggregation/floating.
The method of main emergency reply microcystis waterbloom has at present: (method is to aggravate algae group, and such as clay various has for heavy algae
Mineral assemblage such as diatomite, red soil of function etc., chitosan, aluminium polychloride etc.+clay, gypsum etc. is relatively inhaled by force, by Microcystis aeruginosa
Sinking is adsorbed to float again to evade cyanobacteria), floating algae (the fiber reinforced flocculation of such as Chen Kaihan from air bearing patent of invention series with
Medicament plant seeds by airplane technology combination Zl201010121671.5, zl201010121672.x, zl201010121543.0, and it is theoretical
On intolerant to the shearing of water surface stormy waves traditional air flotation technology)+dredger, various direct physics and chemistry kill algae technology (such as peroxidating
The technology of cyanobacteria is killed in the processing such as hydrogen, copper ion, Iodophor), hydrology technology intercept and enrichment algae (such as flow-disturbing dam or flow-disturbing filter enrichment
Deng).
There are biggish environmental risks for the heavy algae of clay: sinking algae and clay complex are easy to divide again under stormy waves interference
From；After sinking time is long, rotten cyanobacteria decomposition product can not be reentered water pollution water quality by clay absorption.Chemistry and
Microzooplankton is caused to kill while physics kills algae；Floating algae is most thorough method but has higher technology difficult when operating
Degree.
Currently, using the patent of invention such as CN201410614113.0 of calcium aluminate class mineral processing cyanobacteria: a kind of environmental protection is multiple
Powdery blue algae treatment agent and preparation method thereof is closed, is to use calcium aluminate as PH neutralizer, does not have generation sustained release aluminium ion energy
Power not captures precipitating cyanobacteria using the sustained release aluminium ion that high alumina cement hydrolysis generates.
In consideration of it, inventor furthers investigate the above problem, there is this case generation then.
Summary of the invention
Dependence high alumina cement-staple fiber system that the purpose of the present invention is to provide a kind of operations to be easy, environmental risk is small
On the basis of sink algae and bed mud passivation microcystis waterbloom Processing tecchnics.
In order to achieve the above object, the present invention uses such technical solution:
A kind of microcystis waterbloom Processing tecchnics by algae and bed mud passivation heavy in high alumina cement-staple fiber system-based,
Mixture is thrown in water body to be processed with the dosage of 0.2-10 kilograms/every square metre water area, the mixture includes
High alumina cement, auxiliary cationic flocculant and staple fiber in every 100 parts of high alumina cements, assist cationic by weight
The parts by weight of flocculant are greater than 0 part and at 10 parts hereinafter, the parts by weight of staple fiber are greater than 0 part and at 20 parts or less.
As a kind of preferred embodiment of the invention, the auxiliary cationic flocculant is aluminium salt, cationic organic-flocculation
Agent or molysite.
As a kind of preferred embodiment of the invention, the aluminium salt is one in aluminum nitrate, aluminium polychloride and aluminum sulfate
Kind is a variety of.
Molysite can select various industrial goods Ferric Salt Flocculants, and due to the easy crystallization of iron content gel, intensity is low, under reducing atmosphere
Perishable, the fixed ability for capturing water systems'phosphorus is also not so good as aluminium ion, therefore poor is selected as molysite.
As a kind of preferred embodiment of the invention, the cation organic flocculant is cationic polyacrylamide, poly- two
One or more of methacrylic chlorination ammonium and chitin.
As a kind of preferred embodiment of the invention, in the mixture, in every 100 parts of high alumina cements, cationic is assisted
The parts by weight of flocculant are 0.05 part to 10 parts.
As a kind of preferred embodiment of the invention, the mixture further includes alunite miberal powder, in parts by weight, every 100
The additive amount of alunite miberal powder is at 200 parts or less in part high alumina cement.Alunite miberal powder can slowly dissociate in water aluminium from
Son crosslinking absorption cyanobacteria and suspended matter, while the cost of entire mixture can be reduced.
As a kind of preferred embodiment of the invention, the mixture further includes gypsum miberal powder, in parts by weight, every 100 parts
The additive amount of gypsum miberal powder is at 100 parts or less in high alumina cement.Slightly soluble goes out calcium ion to addition gypsum miberal powder in water, can be with cyanobacteria
Surface polysaccharide layer is crosslinked and assembles cyanobacteria, while beneficial to flora growth.
It further include absorption granulated slag, in parts by weight, every 100 as a kind of preferred embodiment of the invention, in the mixture
In part high alumina cement absorption granulated slag at 100 parts hereinafter, absorption granulated slag is flyash or cinder powder or diatomite in powder or aluminium sulfate slag,
These mineral can directly adsorb cyanobacteria, but must flocculant combination be just easy into floc sedimentation and sink.General normal water body is as far as possible not
Using Alkaline minerals such as magnesia, magnesium carbonate, steel slags, it is easy to lead although these Alkaline minerals performances can also be met the requirements
It causes water body PH exceeded, but is then suitble to use when bed mud and water acidification, use ratio and flyash etc..
The present invention if necessary, can add Iron Oxide Minerals, peromag or the nitrate of embedding (and high alumina cement weight
Ratio is in 0-200:100), but most suitable is individually dispensing in advance, rather than it is compound with inventive mixture, it is therefore an objective to give bed mud
Oxygen, and the sulphion of oxidation bed mud are provided.
As a kind of preferred embodiment of the invention, the release time of the mixture is that cyanobacteria sinks the winter passed the winter, this
When cyanobacteria concentrate, capture and after closing bed mud, cyanobacteria can not be detached from gel constraint, dead decomposition product major part quilt substantially
It absorbs, is greatly decreased to this second year cyanobacteria provenance, bed mud nutrients enters body water amount and is greatly decreased, so that large scale is evaded
Or reduce coming year blue algae bloom.It can also be used when cyanobacteria largely occurs but wawter bloom is not yet broken out, cyanobacterial bloom is evaded with emergency
Outburst, but dosage is relatively high, and removal efficiency does not have winter good.Mixture in the present invention can also be used for common natural water
The emergency of other planktonic algaes or leakage suspended matter precipitates disposition in body, and when in use, mixture can be sowed directly or be added
Water is sowed immediately after mixing.
As a kind of preferred embodiment of the invention, the length of the staple fiber is 0.1~10cm.
Microcystis waterbloom Processing tecchnics of the invention, be provided simultaneously with bed mud closing passivation ability and capture cyanobacteria and
The ability of cyanobacteria decomposition product-phosphorus, organic matter, medicament adsorbable Suspended Matter in Water after entering in water (including it is cyanobacteria, green alga, outstanding
Floating object etc.) and sink to the bottom.Gradually aquation, generation have the extremely strong calcium aluminate water for capturing phosphorus and organic acid to high alumina cement at this time
Mineral are closed, and have the gel aluminum hydroxide of very strong flocculation, closing passivation ability.Water PH value is always in entire water treatment procedure
In PH9 hereinafter, inorganic agent will not retain noxious material in water body, organic acid and phosphate radical, pyrophosphate aluminium calcium salt compared with indissoluble
And will not be decomposed because of water hypoxia, gel aluminum hydroxide and the calcium aluminate aquation mixed crystal intensity for being covered on bed mud are high,
It is strong to adsorb and embed cyanobacteria, the ability of suspended matter, the addition of staple fiber can make the floccule body generated and staple fiber and help wadding
Agent collectively constitutes the loose composite flocculation body of some strength, on the one hand just can be under storm resisting assembles the impact of floccule body
It is heavy, fiber reinforced solidifying body on the other hand is collectively formed in bed mud and high alumina cement, can just resist the impact of bed mud fermentation gas
And rupture is reduced, cause the bed mud nutritive water of high nutrition salt and organic matter largely to enter water body.The present invention has easy to operate, ring
The small advantage of border risk.High alumina cement class mineral have adherency and capture water body recovery technology and sink, and continue hydrolysis embedding suspended matter
And the characteristics of solidifying under water, is not yet known, in turn, must be impacted with the presence of staple fiber ability storm resisting when being solidified in water,
There must be short fiber toughened the characteristics of otherwise easily being crushed by bed mud fermentation gas not yet known when the solidification of the bottom.Therefore, base
In high alumina cement --- fiber reinforced system is basis and the key protected object of present patent application.
Specific embodiment
In order to further explain the technical solution of the present invention, being described in detail below with reference to embodiment.
Case study on implementation one:
Quanzhou fishpond is breeded fish, and the outburst of summer algal bloom, preponderant algae is microcystic aeruginosa, the water body light transmission under wawter bloom
10 centimetres of degree.According to 1 square metre 1 kilogram of the water surface of proportion delivering medicament, medicament in advance and 10 parts of water mix after splash the water surface,
A large amount of floccule bodys are quickly formed after water body is muddy at this time, are sunk down within half an hour close to clarification, microcystic aeruginosa sinks substantially
The bottom, 2 days 60 centimetres of water body light transmittance after processing.The reagent combination used: 100 parts of high alumina cement, 5 parts of paper pulp fiber, gypsum
20 parts of miberal powder, 10 parts of aluminium polychloride.Cyanobacteria has growth after 1 month, but quantity is greatly reduced, and light transmittance has been increased to 42 lis
Rice.Treatment process is without the fish phenomena of mortality.
Another mouthful of fishpond microcystic aeruginosa outburst situation is approximate, but still uses the formula, sinks in winter (January) cyanobacteria
To lower part water body, water quality perception is dark yellow, under the situation that about 30 centimetres of light transmittance, is launched, and is formed after discovery water body is muddy
A large amount of floccule bodys sink, and water colour slightly improves, and about 40 centimetres of light transmittance, but until summer, the fishpond microcystic aeruginosa be not quick-fried
Hair, and water colour Continuous optimization, are in peak green, and light transmittance is greater than 60 centimetres.Treatment process is without the fish phenomena of mortality.Advantage swim alga
It kind is chlorella and diatom, bed mud part has that cyanobacteria is dwelt at bottom and bacterium coexists, and the growth of mineral coagulant layer is close in sampling discovery, rationally solves
Releasing is to embed to inhibit after cyanobacteria is captured by medicament, and can not float breeding, causes chlorella and diatom to occupy its ecological niche, mud ---
The nutrients of water termination exchange is absorbed by mineral coagulant layer.
Case study on implementation two:
Nearby pond black and odorous water, bottom of pond due to breeding wastewater pollutes has thick and heavy bed mud on Quanzhou City pig farm.It is right first
A large amount of red muds (waste residue after bauxite alkalinity extraction aluminium salt) are launched in the pond and lime is neutralized to bed mud and closed oxidation
Afterwards, black smelly disappearance, bed mud become maroon and substantially compress, but microcystic aeruginosa largely occur in water shortly after.In winter
(December) goes to processing, and according to one square metre 3 kilograms of amount delivering medicament, water body generates a large amount of floccule bodys and quickly sinks,
Bed mud is deposited into unconsolidated formation and is converted into gel in 2 days, and supplement launches external chlorella water as algae, next year water at this time
Body becomes chlorella advantage water body, and diatom is less, and microcystic aeruginosa ratio is lower than 5%, and water PH value is neutral, bed mud deposits gel
Layer is still kept, and locally has rupture but there is algae fixed growth of largely quivering on surface, it is believed that meet fish pond requirement.
Formula are as follows: 100 parts of high alumina cement, 100 parts of flyash, 75 parts of alunite miberal powder, 25 parts of magnesite powder (auxiliary miberal powder
200 parts in total, sedimentary becomes more loose if increasing again, it is difficult to wash away lower than stormy waves), 10 parts of glass fibre, 2 parts of sun from
The polyacrylamide (being milled down to 100 mesh in advance) of sub- degree 25, these mixtures broadcast sowing the water surface in dry powder form, are broadcasting sowing shipping agency
It sails and voluntarily dissolves, precipitates under the smooth sea to be formed.The formula by inventor be largely used to urban lakes emergency broadcast sowing repair cyanobacteria it is quick-fried
In hair.
Product form of the invention is not limited to embodiment of this case, anyone it is carried out similar thinking it is appropriate change or
Modification, all should be regarded as not departing from patent category of the invention.
Claims (10)
1. a kind of microcystis waterbloom Processing tecchnics by algae and bed mud passivation heavy in high alumina cement-staple fiber system-based,
It is characterized in that: mixture is thrown in water body to be processed with the dosage of 0.2-10 kilograms/every square metre water area, it is described mixed
Closing object includes that high alumina cement, auxiliary cationic flocculant and staple fiber in every 100 parts of high alumina cements, assist by weight
The parts by weight of cationic flocculant are greater than 0 part and at 10 parts hereinafter, the parts by weight of staple fiber are greater than 0 part and at 20 parts or less.
2. a kind of micro-capsule by algae and bed mud passivation heavy in high alumina cement-staple fiber system-based as described in claim 1
Algae wawter bloom Processing tecchnics, it is characterised in that: the auxiliary cationic flocculant is aluminium salt, cationic organic flocculant or iron
Salt.
3. a kind of micro-capsule by algae and bed mud passivation heavy in high alumina cement-staple fiber system-based as claimed in claim 2
Algae wawter bloom Processing tecchnics, it is characterised in that: the aluminium salt is one of aluminum nitrate, aluminium polychloride and aluminum sulfate or more
Kind.
4. a kind of micro-capsule by algae and bed mud passivation heavy in high alumina cement-staple fiber system-based as claimed in claim 3
Algae wawter bloom Processing tecchnics, it is characterised in that: the cation organic flocculant is cationic polyacrylamide, poly dimethyl allyl
One or more of ammonium chloride and chitin.
5. a kind of micro-capsule by algae and bed mud passivation heavy in high alumina cement-staple fiber system-based as claimed in claim 4
Algae wawter bloom Processing tecchnics, it is characterised in that: in the mixture, in every 100 parts of high alumina cements, assist cationic flocculant
Parts by weight are 0.05 part to 10 parts.
6. a kind of micro-capsule by algae and bed mud passivation heavy in high alumina cement-staple fiber system-based as claimed in claim 5
Algae wawter bloom Processing tecchnics, it is characterised in that: the mixture further includes alunite miberal powder, in parts by weight, every 100 parts of high aluminum waters
The additive amount of alunite miberal powder is at 200 parts or less in mud.
7. a kind of micro-capsule by algae and bed mud passivation heavy in high alumina cement-staple fiber system-based as claimed in claim 5
Algae wawter bloom Processing tecchnics, it is characterised in that: the mixture further includes gypsum miberal powder, in parts by weight, every 100 parts of high alumina cements
The additive amount of middle gypsum miberal powder is at 100 parts or less.
8. a kind of micro-capsule by algae and bed mud passivation heavy in high alumina cement-staple fiber system-based as claimed in claim 5
Algae wawter bloom Processing tecchnics, it is characterised in that: further include absorption granulated slag, in parts by weight, every 100 parts of high aluminum waters in the mixture
Granulated slag is adsorbed in mud at 100 parts hereinafter, absorption granulated slag is flyash or cinder powder or diatomite in powder or aluminium sulfate slag.
9. as claimed in any one of claims 1 to 8 a kind of blunt by algae heavy in high alumina cement-staple fiber system-based and bed mud
The microcystis waterbloom Processing tecchnics of change, it is characterised in that: the release time of the mixture is that cyanobacteria sinks to water body lower layer mistake
The winter in winter.
10. a kind of micro-capsule by algae and bed mud passivation heavy in high alumina cement-staple fiber system-based as claimed in claim 9
Algae wawter bloom Processing tecchnics, it is characterised in that: the length of the staple fiber is 0.1~10cm.
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| CN108499547B (en) * | 2018-05-23 | 2021-07-13 | 常州清流环保科技有限公司 | Adsorbent prepared by utilizing polyaluminum chloride filter-pressing residues and method and application thereof |
| CN109354376B (en) * | 2018-11-15 | 2021-04-09 | 泉州师范学院 | Daily maintainability dredging method for sediment of medium and small water bodies |
| CN109292938A (en) * | 2018-12-09 | 2019-02-01 | 安徽航天环境工程有限公司 | One kind washing sludge reuse method containing aluminic acid |
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| CN101786745A (en) * | 2010-03-05 | 2010-07-28 | 泉州师范学院 | Emergent large and medium-sized natural water body algae pollution remediation technique capable of resisting light stormy waves |
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| CN104229957A (en) * | 2013-06-24 | 2014-12-24 | 张家领 | Compound flocculant taking natural minerals as main components |
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| CN104445494A (en) * | 2014-11-03 | 2015-03-25 | 芜湖市祥荣食品有限公司 | Environment-friendly composite powdery blue algae treating agent and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101786745A (en) * | 2010-03-05 | 2010-07-28 | 泉州师范学院 | Emergent large and medium-sized natural water body algae pollution remediation technique capable of resisting light stormy waves |
| CN103373754A (en) * | 2012-04-16 | 2013-10-30 | 薛晓萌 | Tanning wastewater coagulant |
| CN104229957A (en) * | 2013-06-24 | 2014-12-24 | 张家领 | Compound flocculant taking natural minerals as main components |
| CN104261535A (en) * | 2014-09-28 | 2015-01-07 | 佑景天（北京）国际水环境研究中心有限公司 | Efficient discoloring agent and discoloring treatment method of printing and dyeing wastewater |
| CN104445494A (en) * | 2014-11-03 | 2015-03-25 | 芜湖市祥荣食品有限公司 | Environment-friendly composite powdery blue algae treating agent and preparation method thereof |
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