CN104370431B - Blue algae dehydrating method - Google Patents
Blue algae dehydrating method Download PDFInfo
- Publication number
- CN104370431B CN104370431B CN201410684214.5A CN201410684214A CN104370431B CN 104370431 B CN104370431 B CN 104370431B CN 201410684214 A CN201410684214 A CN 201410684214A CN 104370431 B CN104370431 B CN 104370431B
- Authority
- CN
- China
- Prior art keywords
- cyanophyceae
- flocculant
- filter
- blue algae
- dehydration
- 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.)
- Expired - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a blue algae dehydrating method. The method comprises the steps of performing ultrasonic processing, adding a flocculant and filter-pressing to dehydrate, wherein the specific steps are as follows: ultrasonically processing the blue algae for 2-6min; adding the flocculant in the blue algae after the ultrasonic processing, and uniformly stirring; filter-pressing the blue algae after adding the flocculant to dehydrate. Through the adoption of the method disclosed by the invention, the volume of the blue algae is greatly reduced, the heat value is not changed, and the dehydrating degree is high; the processing speed is high, the operation is simple, the large-scale production is facilitated, and the method has wide application prospect.
Description
Technical field
The present invention relates to cyanophyceae pollution technical field, more particularly, to a kind of method of blue algae dewatering is and in particular to a kind of surpass
The method that sound wave assists blue algae dewatering.
Background technology
Eutrophication water outburst algae forms wawter bloom, is a global problem.Over nearly twenties years, with industrial or agricultural
Develop rapidly, population increase, urbanization accelerates, and enters river without the sanitary sewage and industrial and agricultural production waste water of effective process in a large number
River Hu Hai, makes water environment heavily contaminated, the Eutrophic Extent aggravation of many water bodys.And body eutrophication leads to many
Freshwater lake wawter bloom is spread unchecked, bay frequent occurrence, the noxious substance of a large amount of cyanophyceae releases（Algae toxins）, cyanophyceae death after release
Odor causing substance and Organic substance make local water quality and air quality severe exacerbation, seriously jeopardize fishery and drinking water safety, destroy
The water quality of landscape water body.Mainly pass through to salvage at present to control blue algae growth, improve water quality, lift water quality ecological ring
Border.
Salvage the algae rich moisture content generally 95%～99% of cyanophyceae gained, during blue algae bloom, only Taihu Lake is daily just
Have thousands of tons of cyanophyceae is salvaged or filtration treatment.Salvaging cyanophyceae out is too high due to moisture content, brings very to transport, storage
Big cost, also brings great difficulty to final disposal；And cyanophyceae is easily rotten, produce stench after rotting, to surrounding ring
Many harmful effects are brought in border, therefore must quickly process cyanophyceae.If directly filled cyanophyceae, occupy increasingly in short supply
Land resource；Because cyanophyceae moisture content is higher, be also not suitable for incineration disposal.And contain a large amount of cyanophycean toxins in cyanophyceae, blue
Algae toxins are intracellular toxines, and cell rupture discharges and show toxicity, mainly by microcystic aeruginosa, anabena, quiver algae with
And Microcystis viridis etc. produce, environment is caused with very big impact.
Processed being carried out to the cyanophyceae salvaged, thus reducing cyanophyceae volume, being to realize cyanophyceae safe disposal and money
The precondition that sourceization utilizes.At present, some researchs existing to blue algae dewatering technology both at home and abroad, blue algae dewatering method is de- with machinery
Based on water, but need to be nursed one's health before mechanical dehydration, to destroy the affinity between the colloform texture of cyanophyceae, algae water, improve dehydration
Performance.The commonly used Opsonizing method of blue algae dewatering is chemical conditioning at present, adds appropriate coagulant, flocculation aid in cyanophyceae
Deng chemical agent, neutralization cyanophyceae granule institute is electrically charged, reduces the affinity of cyanophyceae granule and hydrone, promotes cyanophyceae granule to wad a quilt with cotton
Solidifying, thus improving the dewatering of cyanophyceae.Traditional conditioner includes ferric chloride, Ming Ji, Calx, flyash, clay etc., this
A little flocculant not only can be used alone, and also can be used in combination.From the point of view of current treatment effect, after flocculant conditioning
Cyanophyceae is still up to 75%～90% through the cyanophyceae moisture content of the cake that mechanical dehydration obtains, and these processing methods are not only added simultaneously
Flocculant relatively costly, and the mud cake after being dehydrated is not met by filling or burning requiring, and remains in cyanophyceae slag
Flocculant but can produce permanent ecological risk to surrounding.Cyanophyceae is nursed one's health using the framework construction body such as Calx, flyash, blue
The moisture content of algae-residue can drop to 57%～87%, but the dosage of framework construction body is larger, not only substantially increase and need to locate
The volume of the cyanophyceae slag of reason, is also unfavorable for that follow-up burning, landfill etc. are disposed.Also have using bioleaching method simultaneously（Patent Shen
Please number：201210437145.9）To promote the deep dehydration of cyanophyceae, time-consuming for this method, 48～72h will be experienced, and degree of dehydration
Not high, the cyanophyceae moisture content after dehydration is 70%.
Therefore, study the new efficient fast dewatering of cyanophyceae, after reducing dehydration further, the technology of the moisture content of cyanophyceae has
Significance.
Content of the invention
The technical problem to be solved in the present invention is that algae moisture content after salvaging for cyanophyceae is very high be unfavorable for after
Reforwarding is defeated and final disposal, and after the use flocculant dehydration that exists of existing blue algae dewatering method, moisture content is still higher, makes
With the technical problem such as need the cyanophyceae volume processing to increase after the dehydration such as flyash, Calx, provide that a kind of energy consumption is low, processing speed
Hurry up, simple to operate, process after cyanophyceae volume substantially reduce, the method for calorific value is unchanged and degree of dehydration is high blue algae dewatering.
In order to solve above-mentioned technical problem, the invention provides a kind of method of blue algae dewatering, comprise the following steps：
（1）Ultrasonic：Cyanophyceae is carried out ultrasonic Treatment；
（2）Plus flocculant：Flocculant is added to obtain the cyanophyceae added with flocculant in the cyanophyceae after ultrasonic；
（3）Filter-press dehydration：Cyanophyceae added with flocculant is carried out filter-press dehydration, completes blue algae dewatering step.
It is preferred that the frequency of ultrasonic Treatment is 30～110kHz in above-mentioned method, the sound intensity is 0.4～0.8W/cm2,
Acoustic density is 0.3W/ml～1.0W/ml.
It is preferred that the time of ultrasonic Treatment is 2～6min in above-mentioned method.
It is preferred that flocculant is inorganic flocculating agent and/or organic flocculant in above-mentioned method, inorganic flocculating agent
Addition is the 1wt%～5wt% of cyanophyceae dry weight；0.05wt%～0.3wt% that the addition of organic flocculant is dried for cyanophyceae.
It is preferred that flocculant is inorganic flocculating agent and organic flocculant in above-mentioned method, the addition of flocculant is indigo plant
0.8wt%～the 3wt% of algae dry weight, in flocculant, the mass ratio of inorganic flocculating agent and organic flocculant is 10～15: 1.
It is preferred that inorganic flocculating agent is aluminium polychlorid, polyaluminium sulfate, poly-ferric chloride, polymerization in above-mentioned method
One or more of iron sulfate.
It is preferred that organic flocculant is polyacrylamide and/or dimethyl diallyl ammonium chloride in above-mentioned method.
It is preferred that step in above-mentioned method（3）Middle using pressure filter, cyanophyceae is carried out with filter-press dehydration, pressure filter adopts
Hole aperture is 8～25 μm of filter cloth.
It is preferred that pressure filter is chamber-type press filter, filter press or diaphragm filter press in above-mentioned method.
The innovative point of the present invention is：
The present invention adopts ultrasonic combined flocculant process cyanophyceae, on the one hand because ultrasound wave has higher energy, energy
Deep discharge in water, produces the extreme condition such as high pressure and high temperature, can change the physics constituting hydrophobic membrane substance and chemical property,
Affinity between the colloform texture of destruction cyanophyceae, algae water, release combines water, improves the dehydration property of cyanophyceae；On the other hand, ultrasound wave
In the presence of, the flocculating effect of flocculant improves, and capillary water absorbing time substantially reduces, the capillary that being difficult in cyanophyceae is sloughed
Water and absorption water become the easy gravitational water removing.
Compared with prior art, it is an advantage of the current invention that：
（1）The present invention adopts ultrasonic Treatment cyanophyceae so that blue algae dewatering degree is high, and the cyanophyceae slag moisture content after dehydration is only
For 65～73%.The weight and volume of cyanophyceae greatly reduces, and significantly reduces subsequent treatment expense, and after being conducive to cyanophyceae
Continuous disposal.Preferably, after process, the dewatering of cyanophyceae greatly improves, precipitability for high intensity, the ultrasonic Treatment effect of short time
Good.Cross high intensity, excessively long ultrasonic Treatment, the dehydration property of cyanophyceae can weaken on the contrary.
（2）The present invention carries out filter-press dehydration using pressure filter to cyanophyceae, equipped with the filter cloth that hole aperture is minimum in pressure filter；
After the HCl dropwise oxidation processes of microwave, filter cloth is not easily blocked cyanophyceae, and not only speed of filter pressing is fast, and solid recovery rate is up to 95%
More than.
（3）The present invention is carried out after processed to cyanophyceae, and calorific value is declined by less than 2%, is highly suitable for compost, mummification, burns
Burn, produce biomass fuel.
（4）The inventive method process is simple, easy to operate, small investment needed for equipment, and operating cost is relatively low, dewatering time
Short, processing speed is fast, is easy to large-scale commercial production.
Brief description
Purpose, technical scheme and advantage for making the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, clear, complete description is carried out to the technical scheme in the embodiment of the present invention.
Fig. 1 is for the sound intensitys different in the embodiment of the present invention 3 to the cyanophyceae capillary water absorbing time after processing and the cyanophyceae after dehydration
The influence curve figure of moisture content.
After Fig. 2 is in the embodiment of the present invention 4, difference acoustic densities are to the cyanophyceae capillary water absorbing time after processing and dehydration
The influence curve figure of cyanophyceae moisture content.
Fig. 3 is that in the embodiment of the present invention 5, different ultrasonic treatment times to the cyanophyceae capillary water absorbing time after processing and take off
The influence curve figure of the cyanophyceae moisture content after water.
Specific embodiment
Below in conjunction with Figure of description and concrete preferred embodiment, the invention will be further described, but not therefore and
Limit the scope of the invention.
Embodiment
Material employed in following examples and instrument are commercially available.
Embodiment 1
A kind of method of blue algae dewatering, comprises the following steps：
（1）Ultrasonic：By the cyanophyceae salvaging（The cyanophyceae initial aqueous rate salvaged is 98%）Through ultrasonic frequency it is
50kHz, sound intensity 0.7W/cm2, ultrasonic Treatment 3min of acoustic density 0.8W/ml.
（2）Plus flocculant：Add bodied ferric sulfate in the ratio that quality is cyanophyceae dry weight 2% in the cyanophyceae after ultrasonic, and
Stir, obtain the cyanophyceae added with flocculant.
（3）Filter-press dehydration：By step（2）In added with flocculant cyanophyceae through diaphragm filter press filter-press dehydration, this barrier film pressure
Filter filter cloth hole aperture is 20 μm, completes blue algae dewatering.
The capillary water absorbing time 89s of untreated cyanophyceae in the present embodiment, dry base heat value is 19.89 MJ/kg.Through implementing
The step of example 1（2）Cyanophyceae capillary water absorbing time after process is 32s, the cyanophyceae moisture content 70% after dehydration, solid recovery rate
97.2%, dry base heat value 19.62 MJ/kg.
Embodiment 2
A kind of method of blue algae dewatering, comprises the following steps：
（1）Ultrasonic：By the cyanophyceae salvaging（The cyanophyceae initial aqueous rate salvaged is 95%）It is 80kHz through frequency, sound
Strong 0.6W/cm2, ultrasonic Treatment 4min of acoustic density 0.5W/ml.
（2）Plus flocculant：Add aluminium polychlorid in the ratio that quality is cyanophyceae dry weight 4% in the cyanophyceae after ultrasonic, and
Stir, obtain the cyanophyceae added with flocculant.
（3）Filter-press dehydration：By step（2）In added with flocculant cyanophyceae through filter press filter-press dehydration, this sheet frame pressure
Filter filter cloth hole aperture is 10 μm about, completes blue algae dewatering.
The capillary water absorbing time 365s of untreated cyanophyceae in the present embodiment, dry base heat value 20.48 MJ/kg.Through embodiment
2 step（2）Cyanophyceae capillary water absorbing time after process is 68s, the cyanophyceae moisture content 68% after dehydration, solid recovery rate
98.4%, dry base heat value 20.03 MJ/kg.
Embodiment 3
A kind of method of blue algae dewatering, comprises the following steps：
（1）Ultrasonic：By the cyanophyceae salvaging（The cyanophyceae initial aqueous rate salvaged is 99%）It is 110kHz through frequency,
The sound intensity is respectively 0～1.2W/cm2, ultrasonic Treatment 5min of acoustic density 0.7W/ml.
（2）Plus flocculant：Add poly-ferric chloride in the ratio that quality is cyanophyceae dry weight 1% in the cyanophyceae after ultrasonic, and
Stir, obtain the cyanophyceae added with flocculant.
（3）Filter-press dehydration：By step（2）In added with flocculant cyanophyceae through chamber-type press filter filter-press dehydration, this van-type pressure
Filter filter cloth hole aperture is 15 μm, completes blue algae dewatering.
The capillary water absorbing time 76s of untreated cyanophyceae in the present embodiment.Step through embodiment 3（2）Indigo plant after process
Cyanophyceae moisture content after algae capillary water absorbing time and dehydration is referring to Fig. 1.
As can be known from Fig. 1, using the sound intensity be 0.4～0.8W/cm2Ultrasonic Treatment, the dehydration rate of cyanophyceae is higher.
Embodiment 4
A kind of method of blue algae dewatering, comprises the following steps：
（1）Ultrasonic：By the cyanophyceae salvaging（The cyanophyceae initial aqueous rate salvaged is 98%）It is 30kHz through frequency, sound
Strong 0.8W/cm2, ultrasonic Treatment 6min of acoustic density difference 0～1.5W/ml.
（2）Plus flocculant：Add polyaluminium sulfate in the ratio that quality is cyanophyceae dry weight 5% in the cyanophyceae after ultrasonic, and
Stir, obtain the cyanophyceae added with flocculant.
（3）Filter-press dehydration：By step（2）In added with flocculant cyanophyceae through filter press filter-press dehydration.This sheet frame pressure
Filter filter cloth hole aperture is 25 μm about, completes blue algae dewatering.
The capillary water absorbing time 107s of untreated cyanophyceae, the step through embodiment 4 in the present embodiment（2）Indigo plant after process
Cyanophyceae moisture content after algae capillary water absorbing time and dehydration is referring to Fig. 2.
As can be known from Fig. 2：Using the ultrasonic Treatment for 0.3W/ml～1.0W/ml for the acoustic density, the dehydration rate of cyanophyceae is relatively
High.
Embodiment 5
A kind of method of blue algae dewatering, comprises the following steps：
（1）Ultrasonic：By the cyanophyceae salvaging（The cyanophyceae initial aqueous rate salvaged is 97%）It is 90kHz through frequency, sound
Strong 0.5W/cm2, the ultrasonic Treatment 0～10min of acoustic density 0.7W/ml.
（2）Plus flocculant：Add dimethyl diene in the ratio that quality is cyanophyceae dry weight 0.3% in the cyanophyceae after ultrasonic
Propyl ammonium chloride, and stir, obtain the cyanophyceae added with flocculant.
（3）Filter-press dehydration：By step（2）In added with flocculant cyanophyceae through diaphragm filter press filter-press dehydration, this barrier film pressure
Filter filter cloth hole aperture is 18 μm about, completes blue algae dewatering.
The capillary water absorbing time 187s of untreated cyanophyceae, the step through embodiment 5 in the present embodiment（2）Indigo plant after process
Cyanophyceae moisture content after algae capillary water absorbing time and dehydration is referring to Fig. 3.
As can be known from Fig. 3：Ultrasonic treatment time is 2～6min, and the dehydration rate of cyanophyceae is higher.
Embodiment 6
A kind of method of blue algae dewatering, comprises the following steps：
（1）Ultrasonic：By the cyanophyceae salvaging（The cyanophyceae initial aqueous rate salvaged is 96%）It is 40kHz through frequency, sound
Strong 0.7W/cm2, ultrasonic Treatment 5min of acoustic density 0.6W/ml.
（2）Plus flocculant：Add polyacrylamide in the ratio that quality is cyanophyceae dry weight 0.05% in the cyanophyceae after ultrasonic
Amine, and stir, obtain the cyanophyceae added with flocculant.
（3）Filter-press dehydration：By step（2）In added with flocculant cyanophyceae through chamber-type press filter filter-press dehydration, this van-type pressure
Filter filter cloth hole aperture is 8 μm about, completes blue algae dewatering.
The capillary water absorbing time 251s of untreated cyanophyceae in the present embodiment, dry base heat value 20.15 MJ/kg.Through embodiment
6 step（2）Cyanophyceae capillary water absorbing time after process is 64s, the cyanophyceae moisture content 70% after dehydration, solid recovery rate
98.4%, dry base heat value 19.89MJ/kg.
Embodiment 7
A kind of method of blue algae dewatering, comprises the following steps：
（1）Ultrasonic：By the cyanophyceae salvaging（The cyanophyceae initial aqueous rate salvaged is 95%）It is 60kHz through frequency, sound
Strong 0.4W/cm2, ultrasonic Treatment 5min of acoustic density 0.9W/ml.
（2）Plus flocculant：Add polyacrylamide in the ratio that quality is cyanophyceae dry weight 0.2% in the cyanophyceae after ultrasonic,
And stir.
（3）Filter-press dehydration：By step（2）In added with flocculant cyanophyceae through chamber-type press filter filter-press dehydration, this van-type pressure
Filter filter cloth hole aperture is 10 μm, completes blue algae dewatering.
The capillary water absorbing time 347s of untreated cyanophyceae, dry base heat value 19.85MJ/kg in the present embodiment.Through embodiment 7
Step（2）Cyanophyceae capillary water absorbing time after process is 85s, the cyanophyceae moisture content 71% after dehydration, solid recovery rate 97.9%,
Dry base heat value 19.62MJ/kg.
Embodiment 8
A kind of method of blue algae dewatering, comprises the following steps：
（1）Ultrasonic：By the cyanophyceae salvaging（The cyanophyceae initial aqueous rate salvaged is 95%）It is 60kHz through frequency, sound
Strong 0.4W/cm2, ultrasonic Treatment 5min of acoustic density 0.9W/ml.
（2）Plus flocculant：Add inorganic organic wadding in the ratio that quality is cyanophyceae dry weight 0.8% in the cyanophyceae after ultrasonic
Solidifying agent, this inorganic organic flocculant is made up of bodied ferric sulfate and polyacrylamide, and its mass ratio is 10: 1, and stirs.
（3）Filter-press dehydration：By step（2）In added with flocculant cyanophyceae through chamber-type press filter filter-press dehydration, this van-type pressure
Filter filter cloth hole aperture is 10 μm, completes blue algae dewatering.
The capillary water absorbing time 347s of untreated cyanophyceae, dry base heat value 19.85MJ/kg in the present embodiment.Through embodiment 8
Step（2）Cyanophyceae capillary water absorbing time after process is 76s, the cyanophyceae moisture content 76% after dehydration, solid recovery rate 98.3%,
Dry base heat value 19.71MJ/kg.
Embodiment 9
A kind of method of blue algae dewatering, comprises the following steps：
（1）Ultrasonic：By the cyanophyceae salvaging（The cyanophyceae initial aqueous rate salvaged is 95%）It is 60kHz through frequency, sound
Strong 0.4W/cm2, ultrasonic Treatment 5min of acoustic density 0.9W/ml.
（2）Plus flocculant：Add inorganic organic-flocculation in the ratio that quality is cyanophyceae dry weight 3% in the cyanophyceae after ultrasonic
Agent, this inorganic organic flocculant is made up of aluminium polychlorid and dimethyl diallyl ammonium chloride, and its mass ratio is 15: 1, and stirs
Mix uniformly.
（3）Filter-press dehydration：By step（2）In added with flocculant cyanophyceae through chamber-type press filter filter-press dehydration, this van-type pressure
Filter filter cloth hole aperture is 10 μm, completes blue algae dewatering.
The capillary water absorbing time 347s of untreated cyanophyceae, dry base heat value 19.85MJ/kg in the present embodiment.Through embodiment 9
Step（2）Cyanophyceae capillary water absorbing time after process is 79s, the cyanophyceae moisture content 77% after dehydration, solid recovery rate 98.4%,
Dry base heat value 19.64MJ/kg.
In embodiment 1 to 9, inorganic flocculating agent addition be cyanophyceae dry weight 1wt%～5wt%；Organic flocculant
0.05wt%～the 0.3wt% being dried for cyanophyceae；The addition of inorganic organic flocculant is the 0.8wt%～3wt% of cyanophyceae dry weight, all
Can implement, and reach same or analogous technique effect.
Comparative example 1
A kind of method of blue algae dewatering, comprises the following steps：
（1）Plus flocculant：To the cyanophyceae salvaging（The cyanophyceae initial aqueous rate salvaged is 98%）In by quality be indigo plant
The ratio of algae dry weight 2% adds bodied ferric sulfate, and stirs, and obtains the cyanophyceae added with flocculant.
（2）Filter-press dehydration：By step（1）In added with flocculant cyanophyceae through diaphragm filter press filter-press dehydration, this barrier film pressure
Filter filter cloth hole aperture is 20 μm, completes blue algae dewatering.
The capillary water absorbing time 89s of untreated cyanophyceae in comparative example 1, dry base heat value 19.89 MJ/kg.Example 1 by contrast
Step（1）Cyanophyceae capillary water absorbing time after process is 48s, the cyanophyceae moisture content 87% after dehydration, solid recovery rate 96.3%,
Dry base heat value 19.74 MJ/kg.
Comparative example 2
A kind of method of blue algae dewatering, comprises the following steps：
（1）Plus flocculant：To the cyanophyceae salvaging（The cyanophyceae initial aqueous rate salvaged is 96%）In by quality be indigo plant
The ratio of algae dry weight 0.05% adds polyacrylamide, and stirs, and obtains the cyanophyceae added with flocculant.
（2）Filter-press dehydration：By step（2）In added with flocculant cyanophyceae through chamber-type press filter filter-press dehydration, this van-type pressure
Filter filter cloth hole aperture is 8 μm about, completes blue algae dewatering.
The capillary water absorbing time 251s of untreated cyanophyceae in comparative example 2, dry base heat value 20.15 MJ/kg.Example 2 by contrast
Step（1）Cyanophyceae capillary water absorbing time after process is 108s, the cyanophyceae moisture content 85% after dehydration, solid recovery rate
96.7%, dry base heat value 19.95MJ/kg.
The above, be only presently preferred embodiments of the present invention, and not the present invention is made with any pro forma restriction.Though
So the present invention is disclosed as above with preferred embodiment, but is not limited to the present invention.Any it is familiar with those skilled in the art
Member, in the case of the spirit without departing from the present invention and technical scheme, can be utilized in the methods and techniques of the disclosure above
Hold and technical solution of the present invention is made with many possible variations and modification, or the Equivalent embodiments being revised as equivalent variations.Therefore,
Every content without departing from technical solution of the present invention, the technical spirit of the foundation present invention is to made for any of the above embodiments any simple
Modification, equivalent, equivalence changes and modification, all still fall within the range of technical solution of the present invention protection.
Claims (4)
1. a kind of blue algae dewatering method is it is characterised in that comprise the following steps：
（1）Ultrasonic：The cyanophyceae salvaging is carried out ultrasonic Treatment；
（2）Plus flocculant：Flocculant is added to obtain the cyanophyceae added with flocculant in the cyanophyceae after ultrasonic；
（3）Filter-press dehydration：Cyanophyceae added with flocculant is carried out filter-press dehydration, completes blue algae dewatering step；At described ultrasound wave
The frequency of reason is 30～110kHz, and the sound intensity is 0.4～0.8W/cm2, acoustic density is 0.3W/ml～1.0W/ml；Described ultrasonic
The time that ripple is processed is 2～6min；Described flocculant is inorganic flocculating agent and organic flocculant, and the addition of described flocculant is
0.8wt%～the 3wt% of cyanophyceae dry weight, in described flocculant, the mass ratio of inorganic flocculating agent and organic flocculant is 10～15: 1；
Described inorganic flocculating agent is one or more of aluminium polychlorid, polyaluminium sulfate, poly-ferric chloride, bodied ferric sulfate；Institute
Stating organic flocculant is polyacrylamide and/or dimethyl diallyl ammonium chloride.
2. blue algae dewatering method according to claim 1 is it is characterised in that step（3）Middle using pressure filter, cyanophyceae is entered
Row filter-press dehydration.
3. blue algae dewatering method according to claim 2 it is characterised in that described pressure filter adopt hole aperture be 8～
25 μm of filter cloth.
4. the blue algae dewatering method according to Claims 2 or 3 is it is characterised in that described pressure filter is chamber-type press filter, plate
Frame pressure filter or diaphragm filter press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410684214.5A CN104370431B (en) | 2014-11-25 | 2014-11-25 | Blue algae dehydrating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410684214.5A CN104370431B (en) | 2014-11-25 | 2014-11-25 | Blue algae dehydrating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104370431A CN104370431A (en) | 2015-02-25 |
| CN104370431B true CN104370431B (en) | 2017-02-22 |
Family
ID=52549677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410684214.5A Expired - Fee Related CN104370431B (en) | 2014-11-25 | 2014-11-25 | Blue algae dehydrating method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104370431B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105693063B (en) * | 2016-01-26 | 2018-06-12 | 江苏省环境科学研究院 | A kind of cyanobacteria deep dehydration and the method for desiccation |
| CN108275853A (en) * | 2018-01-16 | 2018-07-13 | 航天凯天环保科技股份有限公司 | A kind of heavy metal pollution high speed dewatering of slurries system and its method for heavy metal pollution high speed dewatering of slurries |
| CN110563308B (en) * | 2019-09-26 | 2021-10-08 | 江南大学 | Blue algae mud deep dehydration method based on capsular polysaccharide soft lattice thermal rearrangement |
| CN111689607A (en) * | 2020-06-18 | 2020-09-22 | 常州大学 | Method for chemically coagulating blue algae in lake water |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1556051A (en) * | 2003-12-31 | 2004-12-22 | 清华大学深圳研究生院 | Method of using ultra xonic wave to quickly remove algae in water plant raw water |
| CN1789152A (en) * | 2004-12-15 | 2006-06-21 | 中国科学院生态环境研究中心 | Method for removing water algae by utilizing ultrasonic fortified flocculation |
| CN101139123A (en) * | 2007-08-06 | 2008-03-12 | 江苏省农业科学院 | Water bloom blue algae dewatering method |
| CN101503258A (en) * | 2009-02-16 | 2009-08-12 | 常州浩瀚新材料科技有限公司 | Work platform for oxidizing blue algae by high energy physics direct oxidation technology |
| CN101602533A (en) * | 2009-07-13 | 2009-12-16 | 西南化工研究设计院 | A kind of method of controlling blue-green alga bloom |
| CN101913724A (en) * | 2010-08-20 | 2010-12-15 | 常州大学 | Device for treating eutrophication water blue algae |
| CN101948153A (en) * | 2010-09-09 | 2011-01-19 | 河海大学 | Ultrasonic-ultraviolet coupling preprocessor for algae-laden source water |
| CN202214239U (en) * | 2011-08-24 | 2012-05-09 | 同济大学 | Ultrasonic strengthened floating device for removing algae and algal toxin |
| CN102515403A (en) * | 2011-12-22 | 2012-06-27 | 中国科学院水生生物研究所 | Method for removing cyanobacterial bloom and apparatus thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0398688A (en) * | 1989-09-12 | 1991-04-24 | Kubota George Fischer Kk | Water treatment method |
| JPH0833888A (en) * | 1994-04-22 | 1996-02-06 | Sangyo Souzou Kenkyusho | Blue algae treatment and blue algae treating device |
-
2014
- 2014-11-25 CN CN201410684214.5A patent/CN104370431B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1556051A (en) * | 2003-12-31 | 2004-12-22 | 清华大学深圳研究生院 | Method of using ultra xonic wave to quickly remove algae in water plant raw water |
| CN1789152A (en) * | 2004-12-15 | 2006-06-21 | 中国科学院生态环境研究中心 | Method for removing water algae by utilizing ultrasonic fortified flocculation |
| CN101139123A (en) * | 2007-08-06 | 2008-03-12 | 江苏省农业科学院 | Water bloom blue algae dewatering method |
| CN101503258A (en) * | 2009-02-16 | 2009-08-12 | 常州浩瀚新材料科技有限公司 | Work platform for oxidizing blue algae by high energy physics direct oxidation technology |
| CN101602533A (en) * | 2009-07-13 | 2009-12-16 | 西南化工研究设计院 | A kind of method of controlling blue-green alga bloom |
| CN101913724A (en) * | 2010-08-20 | 2010-12-15 | 常州大学 | Device for treating eutrophication water blue algae |
| CN101948153A (en) * | 2010-09-09 | 2011-01-19 | 河海大学 | Ultrasonic-ultraviolet coupling preprocessor for algae-laden source water |
| CN202214239U (en) * | 2011-08-24 | 2012-05-09 | 同济大学 | Ultrasonic strengthened floating device for removing algae and algal toxin |
| CN102515403A (en) * | 2011-12-22 | 2012-06-27 | 中国科学院水生生物研究所 | Method for removing cyanobacterial bloom and apparatus thereof |
Non-Patent Citations (1)
| Title |
|---|
| 超声强化混凝去除蓝藻实验研究;陈杰等;《环境工程学报》;20070326;第1卷(第03期);第66－69页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104370431A (en) | 2015-02-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104370431B (en) | Blue algae dehydrating method | |
| CN103951146B (en) | A kind of mud decrement and mummification method for combined use | |
| CN105384474B (en) | A kind of preparation process of the sludge compoiste fertilizer of deodoring and disinfecting low stain | |
| CN102001814B (en) | Conditioning mehtod for sludge dehydration | |
| CN103319066A (en) | Sludge deep dehydration method | |
| CN104761116B (en) | A kind of method of mud normal-temperature deep dehydration | |
| CN101665376B (en) | Method for treating and comprehensively utilizing sludge after sewage treatment | |
| CN103771681A (en) | Method for extracting and recycling nitrogen and phosphorus in biochemical papermaking sludge and dehydrating sludge | |
| CN104724897A (en) | Sludge dewatering conditioning agent and use method thereof | |
| CN105417928B (en) | A method of using Fenton sludge to municipal sludge dehydrated in situ | |
| CN105948457A (en) | Compounded sludge dewatering conditioner and application method thereof | |
| CN107032567B (en) | Method for deodorizing and reducing municipal sludge | |
| CN104399315B (en) | A kind of method of simultaneously blue-green algae being carried out to detoxification and dehydration | |
| CN101100344A (en) | Treatment method for heating and drying sludge by microwave and low-temperature smoke gas | |
| CN106050175A (en) | Off-ground treatment technology for waste drilling fluid | |
| CN206289155U (en) | A kind of sludge treatment equipment | |
| CN103708704A (en) | Pre-treatment method for deep sludge dewatering | |
| CN107032568B (en) | Municipal sludge deodorization decrement processing system | |
| CN101863612A (en) | Method for improving sludge dewatering performance by combining bioleaching and dual conditioners | |
| CN105110589B (en) | A kind of deep dehydration method of municipal sludge | |
| CN106111662A (en) | Preprocess method before one way of life garbage loading embeading | |
| CN105948206A (en) | Wastewater treating agent | |
| CN106277706A (en) | A kind of deeply dehydrating sludge conditioner | |
| CN105668953A (en) | Innocent treatment method of dyeing sludge | |
| CN104787833B (en) | Method for disposing organochlorine pesticide POPs of lixivium in dangerous and polluted sites by utilizing modified attapulgite clay. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170222 Termination date: 20201125 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |