CN104402146B - A kind of processing method that reduces phosphor in sewage content - Google Patents

A kind of processing method that reduces phosphor in sewage content Download PDF

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Publication number
CN104402146B
CN104402146B CN201410737431.6A CN201410737431A CN104402146B CN 104402146 B CN104402146 B CN 104402146B CN 201410737431 A CN201410737431 A CN 201410737431A CN 104402146 B CN104402146 B CN 104402146B
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sewage
milk
lime
concentration
carbon dioxide
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CN104402146A (en
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郑春明
孙晓红
程相芝
鲍守民
王佳阳
陈佩佩
杨传武
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Tianjin Polytechnic University
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Tianjin Polytechnic University
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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
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • 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
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • 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
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

The present invention relates to a kind of processing method that reduces phosphor in sewage content. In required disposing of sewage, add the milk of lime of 8～12wt% concentration, sewage pH is adjusted to 8.0～8.5; Stir, add silica-based flocculant; In sewage, pass into again milk of lime and carbon dioxide simultaneously, milk of lime addition is 0.1～0.5% of sewage volume, stir and be stabilized in 8.0～8.5 by carbon dioxide throughput adjustment pH, after milk of lime adds, continuing to pass into carbon dioxide and make sewage pH be reduced to 7.5～7.7; Finally adding concentration is 0.1% polyacrylamide; Then separate water outlet and mud juice. This method adopts the aggregate with various functional groups to the multiple pollutant gathering of flocculating, it is good that it has phosphor-removing effect, and cost is low, pollution-free, raw material sources is wide, therefore can comparatively be widely used in municipal sewage treatment and during industry and sanitary wastewater dephosphorization process.

Description

A kind of processing method that reduces phosphor in sewage content
Technical field
The present invention relates to a kind of processing method that reduces phosphorus content in industry and sanitary wastewater, belong to the treatment process technology neck of sewageTerritory; Particularly a kind of processing method that reduces phosphor in sewage content.
Background technology
A few days ago, increasing municipal sewage has brought very large harm to human lives, and therefore, the processing of municipal sewage veryImportant, and urban sewage treatment technology be municipal sewage treatment facility can high-efficiency operation key. For a long time, the dirt of ChinaWater technology, particularly dephosphorization technique are all to have followed American-European countries's route and processing method in the last hundred years, although by learningPractise and use for reference, introduction of foreign technology, and formed gradually oneself technology. But the sewage dephosphorization treatment technology of taking still alsoThere is the shortcomings such as efficiency is low, energy consumption is high, maintenance rate is high, automaticity is low, particularly in the higher industry of phosphorus content and lifeWastewater processing technology aspect is comparatively backward compared with abroad. Nowadays, China more and more recognizes the weight of high-density phosphorus sewage disposalThe property wanted and necessity therefore also start gradually to take various phosphorus-containing wastewater treatment technologies in city. Wherein quite a few cityWhat built sewage treatment plant taked is coagulation or and intensive treatment, in part two stage treatment technique, not yet considerPhosphorus removal functional, water outlet does not have sterilization process, and method has although it is so played some effects to municipal sewage treatment, but this is notAdapt to the requirement of municipal sewage treatment regeneration, the treatment effeciency that improves phosphorus-containing wastewater in municipal sewage treatment is currentThe target that municipal sewage treatment is pursued. Therefore, proceed from reality, strive for simplifying treatment process, improve locating of phosphorus-containing wastewaterReason efficiency and effect, the utilization rate of raising water, just can alleviate existing a series of problems about water in society.
Summary of the invention
The object of the present invention is to provide a kind of processing method that reduces phosphorus content in industry and sanitary wastewater, belong to the processing of sewageTechnology field.
Technical scheme of the present invention is as follows:
A kind of processing method that reduces phosphor in sewage content; Step is as follows:
1) in required disposing of sewage, add the milk of lime of 8～12wt% concentration, sewage pH is adjusted to 8.0～8.5; Stir 3～10Min, adds the silica-based flocculant of 0.1～0.5v/v% (there is no specified otherwise, the present invention is taking sewage as 100% stereometer),Stir 3～10min;
2) to step 1) sewage in pass into again milk of lime and carbon dioxide simultaneously, milk of lime addition is 0.1～0.5 of sewage volume%, stirs and is stabilized in 8.0～8.5 by carbon dioxide throughput adjustment pH, after milk of lime adds, continues to stir 3～10min,And continue to pass into carbon dioxide and make sewage pH be reduced to 7.5～7.7;
3) finally adding concentration is 0.1% polyacrylamide, and the concentration of polyacrylamide that addition is every liter of sewage is 2～10mg,Then sewage is put into settling tank or flotation tank and separated water outlet and mud juice, mud juice filters through filter cloth or vacuum suction filter.
Wherein, the concrete preparation method of described sodium metasilicate and sulfuric acid mixture liquid adopts described in patent applied for 201110407597.8Method. This poly-silicic acid gel flocculant, owing to having added SiO 2 powder as condensation nuclei, coordinates violent mixing speed,Thereby controlled the gelling situation of solution, the poly-silicic acid gel of preparing has good mobility.
This method adopts the aggregate with various functional groups to the multiple pollutant gathering of flocculating, and it is good that it has phosphor-removing effect,,Cost is low, pollution-free, and raw material sources is wide, has the advantages such as good Social benefit and economic benefit, therefore can be comparativelyBe widely used in municipal sewage treatment and during industry and sanitary wastewater dephosphorization process.
Detailed description of the invention
For better understanding the present invention, below in conjunction with embodiment, the present invention is done further and described in detail, but the present invention requires to protectThe scope of protecting is not limited to the scope that embodiment represents.
Embodiment 1:
Low concentration modified polysilicate microgel flocculant is prepared by the following method:
Under high-speed stirred condition, the sodium metasilicate 400kg that is 5wt% by silica concentration, adds the silica of 50ppmPowder, vigorous stirring in cartridge type agitating device, keeping the Reynolds number of liquid in whipping process is 6000, then uses 10wt%The dilute sulfuric acid of weight percent concentration is acidified to pH value of solution 11, is by the instant viscosity of online this mixed liquor of viscometer determining simultaneously20mPaS, is prepared into poly-silicic acid microgel.
Select the sewage from broiler chicken slaughterhouse, pH is 6.4, and it is filtered with qualitative filter paper, makes wherein Leaching Properties of Soluble Phosphorus contentReach stable, then the phosphorus concentration in filtrate is measured. Contained total suspended solid (SS) in one-level waste water after treatmentBe respectively 1470mgL with phosphorus content-1And 6.9mgL-1. And then through two stage treatment, in waste water after treatment, always suspendSolid (SS) and phosphorus content are respectively 1320mgL-1And 8.6mgL-1. Subsequently, in required disposing of sewage, add 8wt%The milk of lime of concentration, is adjusted to 8.0 rear stirring 3min by sewage pH, then adds the silica-based flocculant of 0.1v/v% to stir 3min.Then in above-mentioned sewage, pass into milk of lime and carbon dioxide, milk of lime addition is 0.1v/v% simultaneously, stirs and pass through to regulateCarbon dioxide throughput is stabilized in 8.0 to ensure pH, stops adding after lime, continues to stir 3min, and continues to pass into dioxyChange carbon and make sewage pH be reduced to 7.5, finally add PAMC (CPAM), PAMA (APAM)Or non-ionic polyacrylamide (NPAM) flocculant flocculates, making concentration of polyacrylamide is 2mgL-1, sewage is putEnter settling tank or flotation tank and separate water outlet and mud juice, mud juice filters through filter cloth or vacuum suction filter.
After the block of flocculation is removed through filter screen, concentration phosphorous in clear water and COD (chemical oxygen absorbed) are surveyedAmount, puts into heating vessel by treated moist solids and dehydrates one hour. Water after filtering is regulated, make solidBody is got the sample that a 5g is heavy at the concentration of water and the sample of maximum water holding capacity after consistent dries in the drying baker of 120 DEG C.At this, be elaborated in table 1 with the flocculating effect after clarifying.
The treatment effect of table .1 low concentration modified polysilicate microgel flocculant to phosphorus-containing wastewater
Embodiment 2:
Middle concentration modified polysilicate microgel flocculant is prepared by the following method:
Under high-speed stirred condition, the sodium metasilicate 400kg that is 5wt% by silica concentration, adds the titanium dioxide of 100ppmSi powder, vigorous stirring in cartridge type agitating device, keeping the Reynolds number of liquid in whipping process is 10000, then uses 20wt%It is 10 that the dilute sulfuric acid of weight percent concentration is acidified to pH value of solution, uses the instant viscosity of online this mixed liquor of viscometer determining simultaneouslyFor 25mPaS, be prepared into poly-silicic acid microgel.
Select the sewage from broiler chicken slaughterhouse, pH is 6.4, and it is filtered with qualitative filter paper, makes wherein Leaching Properties of Soluble Phosphorus contentReach stable, then the phosphorus concentration in filtrate is measured. Contained total suspended solid (SS) in one-level waste water after treatmentBe respectively 1500mgL with phosphorus content-1And 6.2mgL-1. And then through two stage treatment, in waste water after treatment, always suspendSolid (SS) and phosphorus content are respectively 1300mgL-1And 8.1mgL-1. Subsequently, in required disposing of sewage, add 10wt%The milk of lime of concentration, is adjusted to 8.2 rear stirring 5min by sewage pH, then adds the silica-based flocculant of 0.2v/v% (by above-mentioned siliconThe preparation of acid sodium aqueous solution and sulfuric acid and obtain) stirring 5min. Then in above-mentioned sewage, pass into milk of lime and carbon dioxide, stone simultaneouslyThe newborn addition of ash is 0.2v/v%, stirs and is stabilized in 8.2 by regulation of carbon dioxide throughput to ensure pH, stops adding stoneAfter ash, continue to stir 5min, and continue to pass into carbon dioxide and make sewage pH be reduced to 7.5, finally add cation polypropyleneAcid amides (CPAM), PAMA (APAM) or non-ionic polyacrylamide (NPAM) flocculant carry outFlocculation, making concentration of polyacrylamide is 5mgL-1, sewage is put into settling tank or flotation tank separation water outlet and mud juice, mud juice warpFilter cloth or vacuum suction filter filter.
After the block of flocculation is removed through filter screen, concentration phosphorous in clear water and COD (chemical oxygen absorbed) are surveyedAmount, puts into heating vessel by treated moist solids and dehydrates one hour. Water after filtering is regulated, make solidBody is got the sample that a 5g is heavy at the concentration of water and the sample of maximum water holding capacity after consistent dries in the drying baker of 120 DEG C.At this, be elaborated in table 2 with the flocculating effect after clarifying.
The treatment effect of concentration modified polysilicate microgel flocculant to phosphorus-containing wastewater in table .2
Embodiment 3:
High concentration modified polysilicate microgel flocculant is prepared by the following method:
Under high-speed stirred condition, the sodium metasilicate 400kg that is 15wt% by silica concentration, adds the titanium dioxide of 500ppmSi powder, vigorous stirring in cartridge type agitating device, keeping the Reynolds number of liquid in whipping process is 10000, then uses 30wt%It is 9 that the dilute sulfuric acid of weight percent concentration is acidified to pH value of solution, is by the instant viscosity of online this mixed liquor of viscometer determining simultaneously45mPaS, is prepared into poly-silicic acid microgel.
Select the sewage from broiler chicken slaughterhouse, pH is 6.4, and it is filtered with qualitative filter paper, makes wherein Leaching Properties of Soluble Phosphorus contentReach stable, then the phosphorus concentration in filtrate is measured. Contained total suspended solid (SS) in one-level waste water after treatmentBe respectively 1570mgL with phosphorus content-1And 6.6mgL-1. And then through two stage treatment, in waste water after treatment, always suspendSolid (SS) and phosphorus content are respectively 1380mgL-1And 8.4mgL-1. Subsequently, in required disposing of sewage, add 12wt%The milk of lime of concentration, is adjusted to 8.5 rear stirring 10min by sewage pH, then adds the silica-based flocculant of 0.5v/v% (by above-mentioned siliconThe preparation of acid sodium aqueous solution and sulfuric acid and obtain) stirring 10min. Then in above-mentioned sewage, pass into milk of lime and carbon dioxide simultaneously,Milk of lime addition is 0.5v/v%, stirs and is stabilized in 8.5 by regulation of carbon dioxide throughput to ensure pH, stops addingAfter lime, continue to stir 10min, and continue to pass into carbon dioxide and make sewage pH be reduced to 7.7, finally add cation poly-thirdAlkene acid amides (CPAM), PAMA (APAM) or non-ionic polyacrylamide (NPAM) flocculant enterRow flocculation, making concentration of polyacrylamide is 10mgL-1, sewage is put into settling tank or flotation tank separation water outlet and mud juice, mud juiceFilter through filter cloth or vacuum suction filter.
After the block of flocculation is removed through filter screen, concentration phosphorous in clear water and COD (chemical oxygen absorbed) are surveyedAmount, puts into heating vessel by treated moist solids and dehydrates one hour. Water after filtering is regulated, make solidBody is got the sample that a 5g is heavy at the concentration of water and the sample of maximum water holding capacity after consistent dries in the drying baker of 120 DEG C.At this, be elaborated in table 3 with the flocculating effect after clarifying.
The treatment effect of table 3 high concentration modified polysilicate microgel flocculant to phosphorus-containing wastewater
Can find out from the result of above-mentioned 3 tables, the coagulation turbidity removing successful of this technique is better than flocculant of polymeric aluminium chloride. , withThe increase of dosage, turbidity removal rate is more stable, is applicable to the needs of suitability for industrialized production. In Treating Municipal Sewage, improveThe treatment effeciency of phosphorus-containing wastewater. Therefore, simplified treatment process, improved treatment effeciency and the effect of phosphorus-containing wastewater, thereby carriedThe high utilization rate of water.

Claims (1)

1. one kind is reduced the processing method of phosphor in sewage content; It is characterized in that step is as follows:
1) in required disposing of sewage, add the milk of lime of 8～12wt% concentration, sewage pH is adjusted to 8.0～8.5; Stir 3～10min,Add the silica-based flocculant of 0.1～0.5v/v%, stir 3～10min;
2) to step 1) sewage in pass into again milk of lime and carbon dioxide simultaneously, milk of lime addition is 0.1～0.5 of sewage volume%, stirs and is stabilized in 8.0～8.5 by carbon dioxide throughput adjustment pH, after milk of lime adds, continues to stir 3～10min,And continue to pass into carbon dioxide and make sewage pH be reduced to 7.5～7.7;
3) finally adding concentration is 0.1% polyacrylamide, and the concentration of polyacrylamide that addition is every liter of sewage is 2～10mg,Then sewage is put into settling tank or flotation tank and separated water outlet and mud juice, mud juice filters through filter cloth or vacuum suction filter.
CN201410737431.6A 2014-12-05 2014-12-05 A kind of processing method that reduces phosphor in sewage content Active CN104402146B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103613227A (en) * 2013-12-09 2014-03-05 天津工业大学 Treatment method of feedwater raw water
CN103626337A (en) * 2013-12-09 2014-03-12 天津工业大学 Treatment method of sewage
CN103771622A (en) * 2014-01-20 2014-05-07 南通华新环保设备工程有限公司 Method for removing phosphorous from domestic sewage

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2856281B2 (en) * 1988-12-19 1999-02-10 大阪瓦斯株式会社 How to remove phosphorus from wastewater

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103613227A (en) * 2013-12-09 2014-03-05 天津工业大学 Treatment method of feedwater raw water
CN103626337A (en) * 2013-12-09 2014-03-12 天津工业大学 Treatment method of sewage
CN103771622A (en) * 2014-01-20 2014-05-07 南通华新环保设备工程有限公司 Method for removing phosphorous from domestic sewage

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