CN108996869A - A kind of method of cyanobacteria algal gel deep dehydration volume reduction - Google Patents

A kind of method of cyanobacteria algal gel deep dehydration volume reduction Download PDF

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Publication number
CN108996869A
CN108996869A CN201810661585.XA CN201810661585A CN108996869A CN 108996869 A CN108996869 A CN 108996869A CN 201810661585 A CN201810661585 A CN 201810661585A CN 108996869 A CN108996869 A CN 108996869A
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CN
China
Prior art keywords
algal gel
cyanobacteria
dosage
cyanobacteria algal
dry measure
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CN201810661585.XA
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Chinese (zh)
Inventor
潘正国
胡明明
胡航宇
陈旭清
张�杰
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无锡德林海环保科技股份有限公司
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Priority to CN201810661585.XA priority Critical patent/CN108996869A/en
Publication of CN108996869A publication Critical patent/CN108996869A/en

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/122Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents

Abstract

The present invention provides a kind of methods of cyanobacteria algal gel deep dehydration volume reduction, the following steps are included: S1, complex enzyme, sodium tripolyphosphate, EDTA and citric acid be added in cyanobacteria algal gel to be processed, mixing homogenizing, the complex enzyme are made of cellulase, amylase and protease;S2, pH to 3~8 is adjusted, ferrous sulfate, strong oxidizer and sodium oxalate is added, stir 0.5~3h;S3, calcium oxide, PAC, PAM is added, stirs evenly;S4, algal gel obtained by step S3 is subjected to filters pressing using filter press.The method of revealed a kind of cyanobacteria algal gel deep dehydration volume reduction through the invention, it realizes and deep dehydration is carried out to cyanobacteria algal gel, the moisture content of cyanobacteria algal gel after being dehydrated volume reduction can be further reduced to 50%, it can also be effectively prevented the generation of peculiar smell simultaneously, have to the good friendly of environment.

Description

A kind of method of cyanobacteria algal gel deep dehydration volume reduction

Technical field

The present invention relates to cyanobacteria algal gel innoxious process for treating field more particularly to a kind of cyanobacteria algal gel deep dehydration volume reductions Method.

Background technique

Cyanobacteria algal gel is from collecting in the waters of blue algae bloom and be formed by purees after carrying out filters pressing.Cyanobacteria algal gel meeting The problems such as occupying a large amount of soils and very big pollution and stink caused to environment.Therefore, to the processing of cyanobacteria algal gel just at The technological difficulties urgently solved very much in cyanobacteria improvement field, it would be highly desirable to which various post-processing means are proposed to cyanobacteria algal gel.Currently, right The processing of cyanobacteria algal gel is mainly for the removal of the algae toxin in cyanobacteria algal gel and subsequent compost treatment etc..Both at home and abroad Numerous studies are carried out for the extractive technique and function of cyanobacteria functional active components, and have had made some progress, but also not It is able to achieve and commercially produces.

Application No. is 200410012803.5 Chinese invention patents to disclose a kind of bloom blue algae compound fertilizer and preparation side Method, bloom blue algae powder and urea, calcium superphosphate, monoammonium phosphate, potassium sulfate are mixed by a certain percentage, are then made through being granulated Organic-inorganic compound fertilizer.But the blue algae powder that the patent uses is difficult to eliminate without hot fermentation processing, algae toxin, and due to indigo plant Algae does not have decomposed, influences fertilizer efficiency.

Simultaneously as the void ratio of cyanobacteria algal gel is greater than mud, but infiltration coefficient is but much smaller than mud, interstitial hydraulic pressure It dissipates very slow.Since the essential difference of cyanobacteria algal gel and mud is in cyanobacteria algal gel to contain a large amount of biomass cells Body.Therefore, the moisture variation in biomass cells body is slow to blue algae muddy water point discharge, when so as to cause cyanobacteria algal gel consolidation Between it is very long.Therefore it needs to carry out volume reduction dehydration to cyanobacteria algal gel.

Application No. is 201310568865.3 Chinese invention patent disclose it is a kind of using strong oxidizer to algal gel depth The method of dehydration uses strong oxidizer hydrogen peroxide, PMA flocculant and water purification agent to carry out deep dehydration to algal gel.But the use The above-mentioned prior art the water content of final obtained cyanobacteria algal gel still reach 50% or so, can not directly carry out compost, burn The subsequent processings such as burning.

In view of this, it is necessary to the method in the prior art for carrying out dehydration volume reduction to cyanobacteria algal gel is improved, with It solves the above problems.

Summary of the invention

It is an object of the invention to disclose a kind of method of cyanobacteria algal gel deep dehydration volume reduction, to realize to cyanobacteria algal gel Deep dehydration is carried out, the moisture content of the cyanobacteria algal gel after being dehydrated volume reduction is lowered, and effectively prevent the generation of peculiar smell.

To achieve the above object, the present invention provides a kind of methods of cyanobacteria algal gel deep dehydration volume reduction, including following step It is rapid:

S1, complex enzyme, sodium tripolyphosphate, EDTA and citric acid are added in cyanobacteria algal gel to be processed, mixing homogenizing, institute Complex enzyme is stated to be made of cellulase, amylase and protease;

S2, pH to 3~8 is adjusted, ferrous sulfate, strong oxidizer and sodium oxalate is added, stir 0.5~3h;

S3, calcium oxide, PAC, PAM is added, stirs evenly;

S4, algal gel obtained by step S3 is subjected to filters pressing using filter press.

As a further improvement of the present invention, the moisture content of the cyanobacteria algal gel to be processed in the step S1 be 85~ 90%.

As a further improvement of the present invention, the dosage of complex enzyme is the absolute dry measure of cyanobacteria algal gel in the step S1 0.1~1%, the dosage of sodium tripolyphosphate is that 0.05~0.5%, EDTA of the absolute dry measure of cyanobacteria algal gel and the dosage of citric acid are equal It is the 0.05~0.5% of the absolute dry measure of cyanobacteria algal gel.

As a further improvement of the present invention, the dosage of ferrous sulfate is the absolute dry measure of cyanobacteria algal gel in the step S2 0.5~5%, the dosage of strong oxidizer is the 0.2~2% of the absolute dry measure of cyanobacteria algal gel, and the dosage of sodium oxalate is that cyanobacteria algal gel is exhausted To the 0.05~0.1% of dry measure.

As a further improvement of the present invention, the strong oxidizer is selected from hydrogen peroxide, potassium bichromate, potassium permanganate or chlorine Hydrochlorate.

As a further improvement of the present invention, the dosage of calcium oxide and PAC are that cyanobacteria algal gel is absolute in the step S3 The 1~5% of dry measure, the dosage of PAM is the 0.05~0.1% of the absolute dry measure of cyanobacteria algal gel.

As a further improvement of the present invention, filter press used in the step S4 is diaphragm plate frame filter press.

As a further improvement of the present invention, the diaphragm plate frame filter press is pressed by algal gel obtained by step S3 When filter, the discharge pressure of algal gel is 0.05~0.9MPa, and when filters pressing, used squeeze pressure was 1.2~2MPa, algal gel conveying Time is 1h, and the squeezing time is 1h.

Compared with prior art, the beneficial effects of the present invention are: revealed a kind of cyanobacteria algal gel depth through the invention The method for being dehydrated volume reduction realizes and carries out deep dehydration, the moisture content of the cyanobacteria algal gel after being dehydrated volume reduction to cyanobacteria algal gel It can be further reduced to 50%, while can also be effectively prevented the generation of peculiar smell, had to the good friendly of environment.

Specific embodiment

Below with reference to each embodiment, the present invention is described in detail, but it should be stated that, these embodiments are simultaneously Non- limitation of the present invention, those of ordinary skill in the art are according to these embodiments in made function, method or structure Equivalent transformation or substitution, all belong to the scope of protection of the present invention within.

In the present embodiment, technical term " the absolute dry measure of cyanobacteria algal gel " refers to, without the cyanobacteria before dehydration volume reduction Algal gel by dehydration volume reduction and after subsequent thorough drying process resulting cyanobacteria algal gel quality.

A kind of method of cyanobacteria algal gel deep dehydration volume reduction, comprising the following steps:

Step S1, complex enzyme, sodium tripolyphosphate, EDTA and citric acid are added in cyanobacteria algal gel to be processed, mixing is equal Change, the complex enzyme is made of cellulase, amylase and protease.Wherein, the cyanobacteria algal gel to be processed in step S1 Moisture content be 85~90%.In step sl, the dosage of complex enzyme is the 0.1~1% of the absolute dry measure of cyanobacteria algal gel, trimerization phosphorus The dosage of sour sodium is 0.05~0.5%, EDTA of the absolute dry measure of cyanobacteria algal gel and the dosage of citric acid is that cyanobacteria algal gel is absolute The 0.05~0.5% of dry measure.In the present embodiment, sodium tripolyphosphate, EDTA, citric acid can be improved under complex enzyme normal temperature condition Activity, play the hydrolysis property of complex enzyme, hydrolyze by polymer outside Cells of Blue-green Algae by complex enzyme, release extracellular gather Close object combination water.

Then, it executes step S2, step S1 cyanobacteria algal gel after treatment uses to pH adjusting agent, such as organic acid, The cyanobacteria algal gel of step S1 after treatment is adjusted pH to 3~8, it is sub- that sulfuric acid is added by inorganic acid, organic base or inorganic base Iron, strong oxidizer and sodium oxalate stir 0.5~3h.Specifically, the dosage of ferrous sulfate is that cyanobacteria algal gel is absolutely dry in step S2 The 0.5~5% of amount, the dosage of strong oxidizer are the 0.2~2% of the absolute dry measure of cyanobacteria algal gel, and the dosage of sodium oxalate is blue algae The 0.05~0.1% of the absolute dry measure of mud.

Strong oxidizer is selected from hydrogen peroxide, potassium bichromate, potassium permanganate or chlorate;In the present embodiment, Strong oxdiative Agent is typical case with hydrogen peroxide, is done exemplary illustrated.Ferrous sulfate-hydrogen peroxide medicament after compounding sodium oxalate has stronger oxidation Cells of Blue-green Algae wall is aoxidized broken wall, so that water releases in Cells of Blue-green Algae by ability.

Then, it executes step S3, calcium oxide, PAC, PAM is added, stir evenly.The dosage of calcium oxide and PAC in step S3 It is the 1~5% of the absolute dry measure of cyanobacteria algal gel, 0.05~0.1% that the dosage of PAM is the absolute dry measure of cyanobacteria algal gel.Wherein, PAC (aluminium polychloride) is commonly referred to as water purification agent or coagulant, it is between AlCl3With Al (OH)3Between a kind of water solubility Inorganic polymer.PAM (polyacrylamide) is typically used as flocculant, and have western property of flocculating, adhesiveness, drop resistive and Thickening property.By the way that PAM is added in cyanobacteria algal gel, the flocculation ability of cyanobacteria particle in cyanobacteria algal gel after pre-processing is increased.

Finally, executing step S4, algal gel obtained by step S3 being carried out filters pressing using filter press.Specifically, in this reality It applies in mode, filter press used in step S4 is diaphragm plate frame filter press.Wherein, diaphragm plate frame filter press is to by step S3 When obtained algal gel carries out filters pressing, the discharge pressure of algal gel is 0.05~0.9MPa, and when filters pressing, used squeeze pressure was 1.2~2MPa, algal gel time of delivery are 1h, and the squeezing time is 1h.

In the present embodiment, it is released after being hydrolyzed the polymer of Cells of Blue-green Algae periphery by the biological enzyme of step S1 In conjunction with water, broken wall is being carried out to Cells of Blue-green Algae by chemical broken wall method, so that the interior water in Cells of Blue-green Algae is released, thus to indigo plant Algae algal gel realizes the volume reduction dehydration of depth.So that cyanobacteria algal gel never handle before cyanobacteria algal gel in moisture content 85~ 90% is down to 50% or so, and cyanobacteria algal gel volume reduction amount reaches 35~40%.In the present embodiment, by the dewatered indigo plant of volume reduction Algae algal gel can directly carry out burning or compost treatment.It can also be effectively prevented the generation of peculiar smell simultaneously, have good to environment Good friendly.

The series of detailed descriptions listed above only for feasible embodiment of the invention specifically Protection scope bright, that they are not intended to limit the invention, it is all without departing from equivalent implementations made by technical spirit of the present invention Or change should all be included in the protection scope of the present invention.

It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims Variation is included within the present invention.

In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiments being understood that.

Claims (8)

1. a kind of method of cyanobacteria algal gel deep dehydration volume reduction, which comprises the following steps:
S1, complex enzyme, sodium tripolyphosphate, EDTA and citric acid are added in cyanobacteria algal gel to be processed, mixing homogenizing is described multiple Synthase is made of cellulase, amylase and protease;
S2, pH to 3~8 is adjusted, ferrous sulfate, strong oxidizer and sodium oxalate is added, stir 0.5~3h;
S3, calcium oxide, PAC, PAM is added, stirs evenly;
S4, algal gel obtained by step S3 is subjected to filters pressing using filter press.
2. the method according to claim 1, wherein cyanobacteria algal gel to be processed in the step S1 is aqueous Rate is 85~90%.
3. the method according to claim 1, wherein the dosage of complex enzyme is that cyanobacteria algal gel is exhausted in the step S1 To the 0.1~1% of dry measure, the dosage of sodium tripolyphosphate is 0.05~0.5%, the EDTA and citric acid of the absolute dry measure of cyanobacteria algal gel Dosage be the 0.05~0.5% of the absolute dry measure of cyanobacteria algal gel.
4. the method according to claim 1, wherein the dosage of ferrous sulfate is cyanobacteria algal gel in the step S2 The 0.5~5% of absolute dry measure, the dosage of strong oxidizer are the 0.2~2% of the absolute dry measure of cyanobacteria algal gel, and the dosage of sodium oxalate is The 0.05~0.1% of the absolute dry measure of cyanobacteria algal gel.
5. method according to claim 1 or 4, which is characterized in that the strong oxidizer be selected from hydrogen peroxide, potassium bichromate, Potassium permanganate or chlorate.
6. the method according to claim 1, wherein the dosage of calcium oxide and PAC are indigo plant in the step S3 The 1~5% of the absolute dry measure of algae algal gel, the dosage of PAM is the 0.05~0.1% of the absolute dry measure of cyanobacteria algal gel.
7. the method according to claim 1, wherein filter press used in the step S4 is diaphragm plate frame Filter press.
8. the method according to the description of claim 7 is characterized in that the diaphragm plate frame filter press is to will be obtained by step S3 When algal gel carries out filters pressing, the discharge pressure of algal gel is 0.05~0.9MPa, when filters pressing used squeeze pressure be 1.2~ 2MPa, algal gel time of delivery are 1h, and the squeezing time is 1h.
CN201810661585.XA 2018-06-25 2018-06-25 A kind of method of cyanobacteria algal gel deep dehydration volume reduction CN108996869A (en)

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