CN101139124A - Blue algae volume reduction technique - Google Patents

Blue algae volume reduction technique Download PDF

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Publication number
CN101139124A
CN101139124A CNA2007100256982A CN200710025698A CN101139124A CN 101139124 A CN101139124 A CN 101139124A CN A2007100256982 A CNA2007100256982 A CN A2007100256982A CN 200710025698 A CN200710025698 A CN 200710025698A CN 101139124 A CN101139124 A CN 101139124A
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China
Prior art keywords
blue
algae
volume reduction
cyanobacteria
squeeze roll
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CNA2007100256982A
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CN100504263C (en
Inventor
丁祖军
周海平
胡苏明
张力桢
曹俊
李万军
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JIANGSU DINGZE ENVIRONMENTAL ENGINEERING Co Ltd
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JIANGSU DINGZE ENVIRONMENTAL ENGINEERING Co Ltd
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Publication of CN101139124A publication Critical patent/CN101139124A/en
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Abstract

A volume reduction treatment process for cyanobacterias belongs to the technical field of the water treatment. The polyaluminium chloride is added in the cyanobacteria pulp and then the polyacrylamide is added in after the cyanobacteria pulp is stirred for five to sixty seconds, after the stirring is implemented for five to sixty seconds, the clay is added in and the cyanobacteria pulp is sufficiently stirred to be uniform so as to implement the dehydration, and then the cyanobacteria cakes or cyanobacteria slags are formed. After being treated by using the process, the cyanobacteria pulp is changed into the cyanobacteria cakes or cyanobacteria slag, the liquid water content of which is smaller than 90%; the volume reduction quantity is larger than or equal to 90%. The process is suitable for various cyanobacterias of different consistencies, allows continuous operation mode and also interval operation mode, is highly efficient and saves energy, is safe and reliable, causes no secondary pollution, not only can be implemented beside the lake, but also go into the mobile operation process on the cyanobacteria salving boat on the lake.

Description

Blue algae volume reduction technique
Technical field
The invention belongs to water-treatment technology field, refer in particular to the technology of handling blue-green algae, i.e. blue algae volume reduction technique.
Background technology
Blue-green algae belongs to " unicellular ", and is widely distributed, no matter is all can grow in fresh water or depression or low foster or high waters of supporting.Blue-green algae can breed rapidly, discharges stench, makes water quality become poison, color change.The toxin that blue-green algae discharges in water body can directly have influence on the health of animal and human's class.The mankind swim in the waters that polluted by blue-green algae, can cause diseases such as skin sensitivity, gastrointestinal system and respiratory system.
To the processing of blue-green algae, directly land-fill method of back is salvaged in domestic common employing, but the blue-green algae water content that salvages is big, needs more occupation of land during landfill disposal, and processing fully of the nitrogen phosphorus in the blue-green algae, and landfill also can cause secondary pollution.
Summary of the invention
The invention provides a kind of blue algae volume reduction technique, obtain to carry out postorders processing such as compost or anhydration and incineration again behind algal biscuit or the algae-residue, main design philosophy is blue algae slurry to be mixed with flocculation agent stir, form in a short time than dehydration behind the big flocculating body and separate, specifically implement like this: blue algae volume reduction technique, it is characterized in that in blue algae slurry, adding polymerize aluminum chloride (PAC), stir 5-60 and add polyacrylamide (PAM) after second again, stir 5-60 second, add clay, fully stir evenly the back dehydration, form algal biscuit or algae-residue.Adopt three kinds of flocculation agents in this technology, at first be PAC, main rising makes that the blue-green algae monomer polymerization becomes little zoogloea in the lake water, visible its of naked eyes forms particulate state, and the compression double electric layer of its hydrolysate, electrically neutralization, the winding net is caught and the effect of adsorbing four aspects such as bridging is accomplished polymerization process; Next is PAM, and main effect is to utilize its huge surface adsorption effect, makes the blue-green algae of the preliminary polymerization of the suspension in the algae water form flco, and its macromolecular chain twines crosslinked mutually, forms to build bridge, thereby makes flucculation structure increase chap, forms big blue-green algae flco at last; Be clay at last, it plays booster action in whole throwing out, by adding clay the blue-green algae flco is separated preferably with water.
In order to implement this technology better, the volumetric concentration of first sampling and measuring flco blue-green algae before the flocculation, determine the add-on of PAC, PAM, clay again according to flco blue-green algae volumetric concentration, measuring method is to add PAM in the blue algae slurry before flocculation until whole formation flcos, after the static layering, observe the volume ratio of water layer and blue-green algae layer, calculate the volumetric concentration of flco blue-green algae, and then flocculation agent is added in gradation, the PAC add-on of every liter of flco blue-green algae is 1-5g, the PAM add-on of every liter of flco blue-green algae is 0.01-0.1g, and the clay add-on of every liter of flco blue-green algae is 10-50g.
In this technology, PAC and PAM add with the solution form, it is unlikely too big to add volume when considering to handle, PAC concentration is formulated in more than the 10g/L, and PAM is mixed with 0.05%-0.5%, and the concentration of PAM can not be too low, otherwise the volumetric errors when surveying blue-green algae concentration is bigger, the concentration of PAM can not be too high, otherwise solution viscosity is big, is not easy to flocculation.
Consider that the former algae slurry water content on salvaging is very high from the lake, it is big directly to carry out the flocculation treatment volume, increase load, for the ease of handling, this technology is carried out pre-treatment to former algae slurry earlier, promptly with the former algae slurry of dissolved air water pre-treatment, algae in the former algae slurry is combined with micro-bubble in the dissolved air water, come-up after the preliminary algae water sepn, obtains the flocculation process that the higher blue algae slurry of concentration carries out postorder more together.
The dehydration of this technology can be adopted the belt filter press dehydration, a strainer of belt filter press is coated on the independent drive squeeze roll, another strainer places and forms a strainer circulation on the squeeze roll group of independent drive squeeze roll bottom, each roller of described squeeze roll group is radially adjustable squeeze roll, make the radius clearance of each roller of squeeze roll group and independent drive squeeze roll adjustable, except that utilizing the strainer tensile force to come the press filtration, increased gap squeezing mode, but the pressure size between two strainers of regulated at will, to blue-green algae flco squeezing better effects if, water ratio is lower, and the laying of this strainer, make the more reasonable compactness of equipment, reduced by a cover belt circulation device, cost is low.When preventing press filtration, blue-green algae is flowed out from the strainer slit and forms secondary pollution, is implanted with fine hair on the strainer of belt filter press, cilium on the fine hair strainer can wrap up blue-green algae when press filtration, press filtration water flows away from the slit, and blue-green algae is then hindered on strainer by cilium, can not taken away by water.Separate for algal biscuit or algae-residue after will squeezing easily, belt filter press is equipped with scraper plate before the independent drive squeeze roll of two fine hair strainer separation place, and fine hair strainer disengaging place of squeeze roll group also is equipped with scraper plate.
Algal biscuit or algae-residue have been become with blue algae slurry after this art breading, its water ratio<90%, blue-green algae subtract capacity 〉=90%, the blue-green algae that is suitable for various different concns, operating method can be continuously can be intermittently, energy-efficient, safe and reliable, non-secondary pollution promptly can also can drag for mobile operational process on the algae ship in the lakeside effect in the lake.
Description of drawings
Accompanying drawing is the structural representation of this technology belt filter press.
Embodiment
Embodiment 1, blue algae volume reduction technique, the volumetric concentration of first sampling and measuring flco blue-green algae before the flocculation, measuring method is to add polyacrylamide in the blue algae slurry before flocculation until whole formation flcos, after the static layering, observe the volume ratio of water layer and blue-green algae layer, calculate the volumetric concentration of flco blue-green algae, in blue algae slurry, add polymerize aluminum chloride, the polymerize aluminum chloride add-on of every liter of flco blue-green algae is 1-5g, stir 5-60 and add polyacrylamide after second again, the polyacrylamide add-on of every liter of flco blue-green algae is 0.01-0.1g, stirs 5-60 second, add clay, the clay add-on of every liter of flco blue-green algae is 10-50g, fully stirs evenly the back with the belt filter press dehydration, forms algal biscuit or algae-residue.Polymerize aluminum chloride and polyacrylamide are to add with the solution form in this technology, and polymerize aluminum chloride concentration is formulated in more than the 10g/L, and polyacrylamide is mixed with 0.05%-0.5%.
Embodiment 2, reference example 1, and before the flocculation treatment, the former algae slurry that directly salvages from the lake with the dissolved air water pre-treatment obtains blue algae slurry to be flocculated after the preliminary algae water sepn earlier.
The belt filter press of dehydration usefulness is through transforming (with reference to the accompanying drawings), article two, all be implanted with fine hair on the strainer 1, article one, strainer 1 is coated on the independent drive squeeze roll 2, another strainer 1 places and forms a strainer circulation on the squeeze roll group 3 of independent drive squeeze roll 2 bottoms, each roller of squeeze roll group 3 is radially adjustable squeeze roll, be equipped with scraper plate 4 before the independent drive squeeze roll 2 of two fine hair strainers, 1 separation place, fine hair strainer 1 disengaging place of squeeze roll group 3 also is equipped with scraper plate 4.

Claims (8)

1. blue algae volume reduction technique is characterized in that adding polymerize aluminum chloride in blue algae slurry, stirs 5-60 and adds polyacrylamide after second again, stirs 5-60 second, adds clay, fully stirs evenly the back dehydration, forms algal biscuit or algae-residue.
2. blue algae volume reduction technique according to claim 1, the volumetric concentration of first sampling and measuring flco blue-green algae before it is characterized in that flocculating, measuring method is to add polyacrylamide in the blue algae slurry before flocculation until whole formation flcos, after the static layering, observe the volume ratio of water layer and blue-green algae layer, calculate the volumetric concentration of flco blue-green algae, and then flocculation agent is added in gradation, the polymerize aluminum chloride add-on of every liter of flco blue-green algae is 1-5g, the polyacrylamide add-on of every liter of flco blue-green algae is 0.01-0.1g, and the clay add-on of every liter of flco blue-green algae is 10-50g.
3. blue algae volume reduction technique according to claim 1 and 2 is characterized in that polymerize aluminum chloride and polyacrylamide add with the solution form, and polymerize aluminum chloride concentration is formulated in more than the 10g/L, and polyacrylamide is mixed with 0.05%-0.5%.
4. blue algae volume reduction technique according to claim 1 is characterized in that elder generation with the former algae slurry that the dissolved air water pre-treatment directly salvages, obtains blue algae slurry to be flocculated after the preliminary algae water sepn from the lake.
5. blue algae volume reduction technique according to claim 1 is characterized in that the dehydration of dehydration employing belt filter press.
6. blue algae volume reduction technique according to claim 5, a strainer that it is characterized in that belt filter press is coated on the independent drive squeeze roll, another strainer places and forms a strainer circulation on the squeeze roll group of independent drive squeeze roll bottom, and each roller of described squeeze roll group is radially adjustable squeeze roll.
7. blue algae volume reduction technique according to claim 6 is characterized in that being implanted with fine hair on the strainer of belt filter press.
8. according to claim 6 or 7 described blue algae volume reduction techniques, it is characterized in that belt filter press is equipped with scraper plate before the independent drive squeeze roll of two fine hair strainer separation place, fine hair strainer disengaging place of squeeze roll group also is equipped with scraper plate.
CNB2007100256982A 2007-08-14 2007-08-14 Blue algae volume reduction technique Active CN100504263C (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102303942A (en) * 2011-04-16 2012-01-04 安徽合协生态环境科技有限公司 Blue alga cake tubular pyrohydrolysis dewatering method and device
CN103588380A (en) * 2013-11-15 2014-02-19 江苏绿威环保科技有限公司 Algae mud deep dehydration method by utilizing strong oxidizing agent
CN103896429A (en) * 2014-03-06 2014-07-02 复旦大学 Algae-water separation device and method applicable to lake improvement

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1059644A (en) * 1991-07-29 1992-03-25 天津市房地产开发经营集团塘沽总公司 The processing method of algae paste after collecting of salt algae
CN1267447A (en) * 1999-03-19 2000-09-27 中国科学院水生生物研究所 Harvest and processing method of microbial algae shuihua
JP3729805B2 (en) * 2002-11-25 2005-12-21 有限会社三栄開発 Inorganic sludge treatment equipment
CN1215166C (en) * 2003-09-02 2005-08-17 中国科学院水生生物研究所 Process for preparing water bloom blue-green algae harvest on lake
CN1323035C (en) * 2004-10-19 2007-06-27 殷肇君 Method for cleaning out blue algae of water area

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102303942A (en) * 2011-04-16 2012-01-04 安徽合协生态环境科技有限公司 Blue alga cake tubular pyrohydrolysis dewatering method and device
CN102303942B (en) * 2011-04-16 2013-11-13 安徽合协生态环境科技有限公司 Blue alga cake tubular pyrohydrolysis dewatering method and device
CN103588380A (en) * 2013-11-15 2014-02-19 江苏绿威环保科技有限公司 Algae mud deep dehydration method by utilizing strong oxidizing agent
CN103896429A (en) * 2014-03-06 2014-07-02 复旦大学 Algae-water separation device and method applicable to lake improvement
CN103896429B (en) * 2014-03-06 2015-10-28 复旦大学 A kind of algae water separation device and method being applicable to lake treatment

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