CN104386898B - Wastewater sludge processing method - Google Patents
Wastewater sludge processing method Download PDFInfo
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- CN104386898B CN104386898B CN201310565263.2A CN201310565263A CN104386898B CN 104386898 B CN104386898 B CN 104386898B CN 201310565263 A CN201310565263 A CN 201310565263A CN 104386898 B CN104386898 B CN 104386898B
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Abstract
The invention discloses a kind of wastewater sludge processing method, this method is first to be dehydrated wastewater sludge to the pretreating sludge that moisture content is 88%～90%, add iron chloride mix homogeneously, then aqua calcis is used to regulate the pH value of described pretreating sludge, add flyash mix homogeneously, finally use pressure filter to be pressed into the clod of moisture content≤50%.Compared with prior art, the present invention starts with in terms of breaking cellular wall modification and mechanism filter-pressing coupling, makes Sludge Surface activation modification change the character of water in mud by adding medicament, will be changed into Free water in conjunction with water, pressure filter is finally used to be pressed into clod, it is simple to the subsequent treatment of mud is disposed.
Description
Technical field
The present invention relates to technical field of sewage, a kind of waste water processes the processing method of produced mud.
Background technology
Wastewater sludge of the present invention is that industrial wastewater, sanitary wastewater are through processing the mud produced, after wastewater sludge is done further process, recycling can be carried out, such as containing fiber fines, lignin and some organic substances in paper mill sludge, by can be as the raw material making fertilizer after processed；Containing the inorganic constituents such as a certain amount of Organic substance and SiO2, Al2O3, CaO in the mud of urban domestic wastewater, can be used as building material.Generally, wastewater sludge through modified, suppress, moisture content is the highest after concentration etc. processes, it is difficult to briquet, dispose to the process that mud is follow-up and bring the biggest difficulty.
At present, moisture percentage in sewage sludge is high, dehydration difficulty, is the key obstacle of restriction specific resistance to filtration.A difficult problem for wastewater sludge dehydration, the scholar of lot of domestic and international and company have developed the technique that chemical conditioning combines mechanical dehydration, commonly referred to as sludge dewatering technology, can the mud of moisture content 99% be disposably dehydrated to 60% once, chemical amendment used is typically based on iron salt, calcium salt, then is aided with the flocculant of other a small amount of kind, and total conditioner addition often accounts for the 20～30% of dewatered sludge dry weight, reagent consumption is high, and mud weightening finish is substantially.The patent of such as Publication No. CN1621371A discloses a kind of compound type sludge high-efficiency dehydration sludge conditioner, and its composition and ratio is that inorganic polymer dehydrating and conditioning agent accounts for 40～90 parts, and organic polymer dehydrating and conditioning agent accounts for 0.5～12 part, limestone 5～55 parts.The patent of Publication No. CN101857352A discloses the conditioning coagulant of a kind of deeply dehydrating sludge, its formula is high polymer coagulant 0.05～50w%, iron salt 0.3～50 w%, calcium salt 0.3～50 w%, pressurize 2～4 hours under 0.1～3.5MPa pressure, can be reduced to less than 65% by moisture percentage in sewage sludge.Also having the deep dehydration technology of some medicament input amounts, but require again higher dewatering pressure at mechanical dewatering stage, even requiring of having is dehydrated under the pressure of 25MPa, it is clear that this is to being all totally unfavorable from the standpoint of the requirement of equipment and operation energy consumption.
Therefore, how in wastewater sludge processing procedure, reduce reagent consumption, reduce the requirement to equipment and operation energy consumption, be improved the solid content after sludge dewatering simultaneously, follow-up the processing of mud is disposed there is particularly important actual application value.
Summary of the invention
It is an object of the invention to provide a kind of wastewater sludge processing method, the method can solve the chemical amendment reagent consumption height that existing wastewater sludge processing method uses, the mud obvious problem of weightening finish.
In order to solve above-mentioned technical problem, the technical solution adopted in the present invention is: this method first by wastewater sludge by pretreating sludge that mechanical dehydration to moisture content is 88%～90%, the iron chloride of account for described pretreating sludge weight 0.75%～2.45%, mix homogeneously is added again in described pretreating sludge；Then aqua calcis is used to regulate the pH value of described pretreating sludge to 6.5～7.5；Add described pretreating sludge weight 0.45%～1.75% flyash, use pressure filter to be pressed into the clod of moisture content≤50% after mix homogeneously.
Wherein, the purpose adding iron chloride in mud is the electric charge in conditioning of mud, makes negative electricity become positive electricity；Calcium hydroxide role is the pH value of conditioning of mud and regulation and the drainability of increase mud；Flyash is then the effect playing solution wadding by releasing the electrostatic force that between mud granule, charge effect is formed.
Owing to using technique scheme, the present invention obtains providing the benefit that:
1, deeply dehydrating sludge amount of modifier is few, effectively reduces Treatment of Sludge cost.
2, whole system is automatically brought into operation, production line balance, succinct smoothness, odorless, noiselessness.
3, can by sludge dewatering to moisture content less than 50%, and dehydration after mud there is hydrophobicity, secondary sludge will not be produced；Comprcssive strength is good, and breathability is excellent, and moisture content continues evaporation in its natural state.
4, dewatered sludge shale can reach resource (composting, fill, burn) and utilizes requirement.
5, deeply dehydrating sludge modifying agent does not change original character of mud, has sterilizing and deodorizing function simultaneously.
6, whole processing procedure cold conditions operation, it is not necessary to thermal source, less consumes primary energy, economic and environment-friendly.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described:
The process of the mud that moisture content is 97% that Industrial Wastewater Treatment is produced by embodiment 1
First the wastewater sludge by 97% is the pretreating sludge of 88% by mechanical dehydration to moisture content；The iron chloride of account for described pretreating sludge weight 0.75%, mix homogeneously is added again in described pretreating sludge；Then aqua calcis is used to regulate the pH value of described pretreating sludge to 6.5；After add described pretreating sludge weight 0.45% flyash, mix homogeneously；Pressure filter is finally used to be pressed into the clod of moisture content≤50%.
Embodiment 2 processes the process of the mud that moisture content is 97% produced to sanitary wastewater
It is first the pretreating sludge of 88% by wastewater sludge that moisture content is 97% by mechanical dehydration to moisture content；The iron chloride of account for described pretreating sludge weight 1.25%, mix homogeneously is added again in described pretreating sludge；Then aqua calcis is used to regulate the pH value of described pretreating sludge to 6.5；After add described pretreating sludge weight 0.75% flyash, mix homogeneously；Pressure filter is finally used to be pressed into the clod of moisture content≤50%.
The process of the mud that moisture content is 98% that Industrial Wastewater Treatment is produced by embodiment 3
It is first the pretreating sludge of 89% by the wastewater sludge of moisture content 98% by mechanical dehydration to moisture content；The iron chloride of account for described pretreating sludge weight 1.25%, mix homogeneously is added again in described pretreating sludge；Then aqua calcis is used to regulate the pH value of described pretreating sludge to 7.0；After add described pretreating sludge weight 0.85% flyash, mix homogeneously；Pressure filter is finally used to be pressed into the clod of moisture content≤50%.
Embodiment 4 processes the process of the mud that moisture content is 98% produced to sanitary wastewater
It is first the pretreating sludge of 89% by the wastewater sludge of moisture content 98% by mechanical dehydration to moisture content；The iron chloride of account for described pretreating sludge weight 1.85%, mix homogeneously is added again in described pretreating sludge；Then aqua calcis is used to regulate the pH value of described pretreating sludge to 7.0；After add described pretreating sludge weight 1.25% flyash, mix homogeneously；Pressure filter is finally used to be pressed into the clod of moisture content≤50%.
The process of the mud that moisture content is 99% that Industrial Wastewater Treatment is produced by embodiment 5
It is first the pretreating sludge of 90% by the wastewater sludge of moisture content 99% by mechanical dehydration to moisture content；The iron chloride of account for described pretreating sludge weight 1.75%, mix homogeneously is added again in described pretreating sludge；Then aqua calcis is used to regulate the pH value of described pretreating sludge to 7.5；After add described pretreating sludge weight 1.25% flyash, mix homogeneously；Pressure filter is finally used to be pressed into the clod of moisture content≤50%.
Embodiment 6 processes the process of the mud that moisture content is 99% produced to sanitary wastewater
It is first the pretreating sludge of 90% by the wastewater sludge of moisture content 99% by mechanical dehydration to moisture content；The iron chloride of account for described pretreating sludge weight 2.45%, mix homogeneously is added again in described pretreating sludge；Then aqua calcis is used to regulate the pH value of described pretreating sludge to 7.5；After add described pretreating sludge weight 1.75% flyash, mix homogeneously；Pressure filter is finally used to be pressed into the clod of moisture content≤50%.
Claims (7)
1. a wastewater sludge processing method, including first by the mechanical dewatering stage of wastewater sludge dehydration to the pretreating sludge that moisture content is 88%～90%, it is characterized in that: in described pretreating sludge, first add the iron chloride of account for described pretreating sludge weight 0.75%～2.45%, mix homogeneously；Then aqua calcis is used to regulate the pH value of described pretreating sludge to 6.5～7.5；Add described pretreating sludge weight 0.45%～1.75% flyash, use pressure filter to be pressed into the clod of moisture content≤50% after mix homogeneously.
Wastewater sludge processing method the most according to claim 1, it is characterised in that: described wastewater sludge is industrial wastewater sludge, and it is 88% that described mechanical dewatering stage controls the moisture content of pretreating sludge；The addition of described iron chloride is the 0.75% of described pretreating sludge weight；Aqua calcis is used to regulate the pH value of described pretreating sludge to 6.5；The addition of described flyash is the 0.45% of described pretreating sludge weight.
Wastewater sludge processing method the most according to claim 1, it is characterised in that: described wastewater sludge is life wastewater sludge, and it is 88% that described mechanical dewatering stage controls the moisture content of pretreating sludge；The addition of described iron chloride is the 1.25% of described pretreating sludge weight；Aqua calcis is used to regulate the pH value of described pretreating sludge to 6.5；The addition of described flyash is the 0.75% of described pretreating sludge weight.
Wastewater sludge processing method the most according to claim 1, it is characterised in that: described wastewater sludge is industrial wastewater sludge, and it is 89% that described mechanical dewatering stage controls the moisture content of pretreating sludge；The addition of described iron chloride is the 1.25% of described pretreating sludge weight；Aqua calcis is used to regulate the pH value of described pretreating sludge to 7.0；The addition of described flyash is the 0.85% of described pretreating sludge weight.
Wastewater sludge processing method the most according to claim 1, it is characterised in that: described wastewater sludge is life wastewater sludge, and it is 89% that described mechanical dewatering stage controls the moisture content of pretreating sludge；The addition of described iron chloride is the 1.85% of described pretreating sludge weight；Aqua calcis is used to regulate the pH value of described pretreating sludge to 7.0；The addition of described flyash is the 1.25% of described pretreating sludge weight.
Wastewater sludge processing method the most according to claim 1, it is characterised in that: described wastewater sludge is industrial wastewater sludge, and it is 90% that described mechanical dewatering stage controls the moisture content of pretreating sludge；The addition of described iron chloride is the 1.75% of described pretreating sludge weight；Aqua calcis is used to regulate the pH value of described pretreating sludge to 7.5；The addition of described flyash is the 1.25% of described pretreating sludge weight.
Wastewater sludge processing method the most according to claim 1, it is characterised in that: described wastewater sludge is industrial wastewater sludge, and it is 90% that described mechanical dewatering stage controls the moisture content of pretreating sludge；The addition of described iron chloride is the 2.45% of described pretreating sludge weight；Aqua calcis is used to regulate the pH value of described pretreating sludge to 7.5；The addition of described flyash is the 1.75% of described pretreating sludge weight.
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| CN201310565263.2A CN104386898B (en) | 2013-11-13 | 2013-11-13 | Wastewater sludge processing method |
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| CN201310565263.2A CN104386898B (en) | 2013-11-13 | 2013-11-13 | Wastewater sludge processing method |
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| CN104386898B true CN104386898B (en) | 2016-08-17 |
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| CN110395878A (en) * | 2019-06-18 | 2019-11-01 | 路德环境科技股份有限公司 | A kind of municipal sludge deep dewatering, solidifying method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101182255A (en) * | 2007-10-29 | 2008-05-21 | 广州普得环保设备有限公司 | Environmental organic nutrient soil as well as preparation technique and application thereof |
| CN102964053A (en) * | 2012-11-09 | 2013-03-13 | 徐渊 | Domestic sludge drying treatment method |
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| JPS54149256A (en) * | 1978-05-15 | 1979-11-22 | Fuji Satsushi Kogyo Kk | Dehydrating solidifying agent of sewage sludge and dehydrating solidifying method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101182255A (en) * | 2007-10-29 | 2008-05-21 | 广州普得环保设备有限公司 | Environmental organic nutrient soil as well as preparation technique and application thereof |
| CN102964053A (en) * | 2012-11-09 | 2013-03-13 | 徐渊 | Domestic sludge drying treatment method |
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