CN109020155A - A kind of sludge oxidized form conditioner and sludge conditioning method - Google Patents

A kind of sludge oxidized form conditioner and sludge conditioning method Download PDF

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Publication number
CN109020155A
CN109020155A CN201810909957.6A CN201810909957A CN109020155A CN 109020155 A CN109020155 A CN 109020155A CN 201810909957 A CN201810909957 A CN 201810909957A CN 109020155 A CN109020155 A CN 109020155A
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CN
China
Prior art keywords
sludge
conditioning
added
flocculant
conditioner
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Pending
Application number
CN201810909957.6A
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Chinese (zh)
Inventor
夏洪娟
温建伟
牛鸣晓
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BEIJING HI-STANDARD ENVIRONMENTAL EQUIPMENT Co Ltd
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BEIJING HI-STANDARD ENVIRONMENTAL EQUIPMENT Co Ltd
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Priority to CN201810909957.6A priority Critical patent/CN109020155A/en
Publication of CN109020155A publication Critical patent/CN109020155A/en
Pending legal-status Critical Current

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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
    • C02F11/14Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/06Treatment of sludge; Devices therefor by oxidation

Abstract

The invention discloses a kind of sludge oxidized form conditioner and sludge conditioning methods, sludge oxidized form conditioner of the invention, including oxidant, flocculant and pH adjusting agent, wherein oxidant is hydrogenperoxide steam generator, flocculant is ferrous sulfate or aluminum sulfate, and pH adjusting agent is dilute sulfuric acid.Present invention solves the technical problem that be the disadvantage for overcoming the dehydration technique increase-volume of existing sludge serious, provide one kind will not increase-volume, to improve the unit calorific value of dewatered sludge and the sludge oxidized form conditioner of the content of organic matter and sludge conditioning method.

Description

A kind of sludge oxidized form conditioner and sludge conditioning method
Technical field
The present invention relates to technical field of sludge treatment.Specially a kind of sludge oxidized form conditioner and sludge conditioning method.
Background technique
Sludge is the by-product after sewage treatment, with the development of urbanization and the raising of environmental requirement, the yield of sludge It sharply increases.The increase of sewage load, necessarily causes sludge yield to increase.The mobile phase of sludge is mainly moisture, usually dirty The moisture content of mud is very high, up to 90% or more, in sludge containing a large amount of germs, helminth and harmful substance (such as heavy metal) and It is often accompanied by stink, is piled up arbitrarily or is dealt with improperly, all may cause secondary pollution.In addition, in addition to above-mentioned substance, in sludge Also contain a large amount of organic matter, if disposition meeting is piled up arbitrarily so that a large amount of organic matters waste.
The deep dehydration technology of sludge becomes a kind of technology of effective sludge reduction, in traditional dewatering technology of mud In, the conditioner of addition is lime and molysite.In such a process, it needs to add a large amount of conditioner, will lead to sludge increase-volume Seriously, the unit calorific value of sludge itself is reduced, the content of organic matter is reduced, is unfavorable for the recyclings such as subsequent burning, carbonization, compost Disposition.
Summary of the invention
Present invention solves the technical problem that being the disadvantage for overcoming the dehydration technique increase-volume of existing sludge serious, one is provided Kind will not increase-volume, to improve the unit calorific value of dewatered sludge and the sludge oxidized form conditioner of the content of organic matter.
Sludge oxidized form conditioner of the invention, including oxidant, flocculant and pH adjusting agent, wherein oxidant is peroxide Change hydrogen solution, flocculant is ferrous sulfate or aluminum sulfate, and pH adjusting agent is dilute sulfuric acid.
Preferably, the weight ratio of hydrogenperoxide steam generator is the 10%-15% of over dry sludge quantity.
Preferably, flocculant is the ferrous sulfate for the 8%-10% that weight ratio is over dry sludge quantity or weight ratio is exhausted The aluminum sulfate of the 20%-25% of dewatered sludge amount.
The present invention also provides a kind of sludge conditioning method, include the steps that next coming in order carry out:
(1) sludge is added in sludge agitator tank;
(2) pH to 3-5 of dilute sulfuric acid conditioning of mud is added and stirs;
(3) hydrogenperoxide steam generator and flocculant is added, wherein flocculant is ferrous sulfate or aluminum sulfate, is then stirred;
(4) sludge after mixing evenly is subjected to mechanical dehydration.
Preferably, step (1) specifically includes: the sludge that moisture content weight ratio is 60-85% is added to sludge agitation In tank, water is added to make the moisture content of sludge to 90%-92%.
Preferably, the stirring in step (2) is to be stirred 5 minutes with 80 revs/min of mixing speed.
Preferably, the weight ratio for the hydrogenperoxide steam generator being added in step (3) is the 10%-15% of over dry sludge, add The flocculant entered is the ferrous sulfate solid for the 8%-10% that weight ratio is over dry sludge or be weight ratio is over dry sludge The aluminum sulfate of 20%-25%.
Preferably, the stirring in step (3) is to stir 60 minutes under 80 revs/min of mixing speed.
Preferably, step (4) includes that sludge is sent into squeeze pressure most into dredge pump for 1.0MPa by feed pressure The greatly filter press of 1.6MPa.
Preferably, the moisture percentage in sewage sludge after mechanical dehydration is 55% or less.
Sludge oxidized form conditioner and sludge conditioning method of the invention compared with prior art, has below beneficial to effect Fruit:
1, sludge oxidized form conditioner of the invention can destroy sludge cell wall, make to improve sludge flocculation settleability Energy.
2, sludge conditioning method of the invention improves sludge using sludge oxidized form conditioner, and the flocculation for improving sludge is heavy Performance drops, while cooperative mechanical is dehydrated, so that mud extraction moisture content is reduced to 55% hereinafter, mud extraction pH is 6-7.Meanwhile it solving The increase-volume problem of existing sludge dewatering treatment does not reduce sludge calorific value itself, the resource utilization of more conducively subsequent sludge.
Specific embodiment
A kind of sludge oxidized form conditioner, including oxidant, flocculant and pH adjusting agent, wherein oxidant is hydrogen peroxide Solution, weight ratio are the 10%-15% of over dry sludge quantity.Flocculant is ferrous sulfate or aluminum sulfate, when selection ferrous sulfate When, the weight ratio of ferrous sulfate is the 8%-10% of over dry sludge quantity, and when selecting aluminum sulfate, the weight ratio of aluminum sulfate is that over dry is dirty The 20%-25% of mud amount.PH adjusting agent is dilute sulfuric acid, for mutually neutralizing with hydrogenperoxide steam generator, with the pH of conditioning of mud.
Sludge oxidized form conditioner of the invention can destroy sludge cell wall, so that sludge flocculation settling property can be improved.
The invention also includes a kind of sludge conditioning method, include the steps that next coming in order carry out:
(1) sludge is added in sludge agitator tank, step (1) specifically includes: is 60-85%'s by moisture content weight ratio Sludge is added in sludge agitator tank, and water is added to make the moisture content of sludge to 90%-92%.
(2) pH to 3-5 of dilute sulfuric acid conditioning of mud is added and stirs, stirs as with 80 revs/min of mixing speed stirring 5 Minute.
(3) hydrogenperoxide steam generator and flocculant is added, the weight ratio of the hydrogenperoxide steam generator of addition is over dry sludge 10%-15%, the flocculant of addition are the ferrous sulfate solid for the 8%-10% that weight ratio is over dry sludge or are weight ratio It for the aluminum sulfate of the 20%-25% of over dry sludge, then stirs, stirs to stir 60 points under 80 revs/min of mixing speed Clock.
(4) sludge after mixing evenly is subjected to mechanical dehydration, is 1.0MPa into dredge pump specifically by feed pressure Sludge feeding squeeze pressure is up to the filter press of 1.6MPa.
Sludge conditioning method of the invention improves sludge using sludge oxidized form conditioner, improves the flocculating setting of sludge Performance, while cooperative mechanical is dehydrated, so that mud extraction moisture content can be reduced to 55% hereinafter, mud extraction pH is 6-7.Meanwhile it solving The increase-volume problem of existing sludge dewatering treatment does not reduce sludge calorific value itself, the resource utilization of more conducively subsequent sludge.
Several embodiments of sludge conditioning method are introduced in detail below:
Embodiment 1:
The present embodiment using sludge oxidized form conditioner Opsonizing method the following steps are included:
(1) sludge that moisture content weight ratio is 80% is added in sludge agitator tank, water is added to make the moisture content of sludge extremely 90%.
(2) pH to 3 of dilute sulfuric acid conditioning of mud is added, is stirred 5 minutes under 80 revs/min of mixing speed.
(3) hydrogenperoxide steam generator of over dry sludge quantity 10% and 10% ferrous sulfate solid is added, at 80 revs/min It is stirred 60 minutes under mixing speed.
(4) sludge after mixing evenly is subjected to mechanical dehydration, the filter chamber of filter press is having a size of 0.6*0.6m, into dredge pump Feed pressure is 1.0MPa, and the squeeze pressure of filter press is up to 1.6MPa, and the time of dehydration is 60 minutes.
After last mechanical dehydration, the moisture content of mud extraction mud cake is 52.5%, and the pH of filtrate is 4, and the pH of mud cake is 6.5。
Embodiment 2:
The present embodiment using sludge oxidized form conditioner Opsonizing method the following steps are included:
(1) sludge that moisture content weight ratio is 80% is added in sludge agitator tank, water is added to make the moisture content of sludge extremely 90%.
(2) pH to 4 of dilute sulfuric acid conditioning of mud is added, is stirred 5 minutes under 80 revs/min of mixing speed.
(3) hydrogenperoxide steam generator of over dry sludge quantity 10% and 10% aluminum sulfate solid is added, in 80 revs/min stir It mixes and is stirred 60 minutes under speed.
(4) sludge after mixing evenly is subjected to mechanical dehydration, the filter chamber of filter press is having a size of 0.6*0.6m, into dredge pump Feed pressure is 1.0MPa, and the squeeze pressure of filter press is up to 1.6MPa, and the time of dehydration is 60 minutes.
After last mechanical dehydration, the moisture content of mud extraction mud cake is 54.5%, and the pH of filtrate is 4.5, and the pH of mud cake is 6.8。
Embodiment 3:
The present embodiment using sludge oxidized form conditioner Opsonizing method the following steps are included:
(1) sludge that moisture content weight ratio is 80% is added in sludge agitator tank, water is added to make the moisture content of sludge extremely 90%.
(2) pH to 4 of dilute sulfuric acid conditioning of mud is added, is stirred 5 minutes under 80 revs/min of mixing speed.
(3) hydrogenperoxide steam generator of over dry sludge quantity 10% and 8% aluminum sulfate solid is added, in 80 revs/min stir It mixes and is stirred 40 minutes under speed.
(4) sludge after mixing evenly is subjected to mechanical dehydration, the filter chamber of filter press is having a size of 0.6*0.6m, into dredge pump Feed pressure is 1.0MPa, and the squeeze pressure of filter press is up to 1.6MPa, and the time of dehydration is 60 minutes.
After last mechanical dehydration, the moisture content of mud extraction mud cake is 56%, and the pH of filtrate is 4.6, and the pH of mud cake is 6.8。
Embodiment 4:
The present embodiment using sludge oxidized form conditioner Opsonizing method the following steps are included:
(1) sludge that moisture content weight ratio is 80% is added in sludge agitator tank, water is added to make the moisture content of sludge extremely 90%.
(2) pH to 3 of dilute sulfuric acid conditioning of mud is added, is stirred 5 minutes under 80 revs/min of mixing speed.
(3) hydrogenperoxide steam generator of over dry sludge quantity 15% and 8% ferrous sulfate solid is added, at 80 revs/min It is stirred 60 minutes under mixing speed.
(4) sludge after mixing evenly is subjected to mechanical dehydration, the filter chamber of filter press is having a size of 0.6*0.6m, into dredge pump Feed pressure is 1.0MPa, and the squeeze pressure of filter press is up to 1.6MPa, and the time of dehydration is 60 minutes.
After last mechanical dehydration, the moisture content of mud extraction mud cake is 51.3%, and the pH of filtrate is 3.5, and the pH of mud cake is 6.3。
In conclusion the present invention improves sludge using sludge oxidized form conditioner, including oxidant, flocculant and PH adjusting agent, the oxidized form conditioner destroy sludge cell wall, improve sludge flocculation situation.Finally using filter press Filters pressing is carried out, mud extraction moisture content can be reduced to 55% hereinafter, mud extraction pH is 6-7, and there is no increase-volume problems, do not reduce sludge itself Calorific value does not influence the resource utilization of subsequent sludge.
Above embodiments are only exemplary embodiment of the present invention, are not used in the limitation present invention, protection scope of the present invention It is defined by the claims.Those skilled in the art within the spirit and scope of the present invention, make the present invention various Modification or equivalent replacement are also fallen within the protection scope of the present invention.

Claims (10)

1. a kind of sludge oxidized form conditioner, which is characterized in that including oxidant, flocculant and pH adjusting agent, wherein oxidant For hydrogenperoxide steam generator, flocculant is ferrous sulfate or aluminum sulfate, and pH adjusting agent is dilute sulfuric acid.
2. sludge oxidized form conditioner according to claim 1, which is characterized in that the weight ratio of hydrogenperoxide steam generator is exhausted The 10%-15% of dewatered sludge amount.
3. sludge oxidized form conditioner according to claim 1 or 2, which is characterized in that flocculant is that weight ratio is over dry The ferrous sulfate or weight ratio of the 8%-10% of sludge quantity is the aluminum sulfate of the 20%-25% of over dry sludge quantity.
4. a kind of sludge conditioning method, which is characterized in that include the steps that next coming in order carry out:
(1) sludge is added in sludge agitator tank;
(2) pH to 3-5 of dilute sulfuric acid conditioning of mud is added and stirs;
(3) hydrogenperoxide steam generator and flocculant is added, wherein flocculant is ferrous sulfate or aluminum sulfate, is then stirred;
(4) sludge after mixing evenly is subjected to mechanical dehydration.
5. sludge conditioning method according to claim 4, which is characterized in that step (1) specifically includes: by moisture content weight Than being added in sludge agitator tank for the sludge of 60-85%, water is added to make the moisture content of sludge to 90%-92%.
6. sludge conditioning method according to claim 5, which is characterized in that the stirring in step (2) is with 80 revs/min Mixing speed stir 5 minutes.
7. sludge conditioning method according to claim 5, which is characterized in that the hydrogenperoxide steam generator being added in step (3) Weight ratio be over dry sludge 10%-15%, the flocculant of addition is the sulfuric acid for the 8%-10% that weight ratio is over dry sludge Ferrous solid or aluminum sulfate for the 20%-25% that weight ratio is over dry sludge.
8. sludge conditioning method according to claim 7, which is characterized in that the stirring in step (3) is at 80 revs/min Mixing speed under stir 60 minutes.
9. sludge conditioning method according to claim 7, which is characterized in that step (4) includes being by feed pressure The filter press that sludge feeding squeeze pressure is up to 1.6MPa into dredge pump of 1.0MPa.
10. sludge conditioning method according to claim 9, which is characterized in that the moisture percentage in sewage sludge after mechanical dehydration is 55% or less.
CN201810909957.6A 2018-08-10 2018-08-10 A kind of sludge oxidized form conditioner and sludge conditioning method Pending CN109020155A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53110964A (en) * 1977-03-10 1978-09-28 Kurita Water Ind Ltd Dehydrating method for organic sludge
CN104003602A (en) * 2014-06-16 2014-08-27 周旋辉 Method for improving dehydration performance of sludge through oxidizing organic matters in sludge
CN104071962A (en) * 2013-03-29 2014-10-01 湖南清和环保技术有限公司 Treatment method of river or lake sediments
CN105645732A (en) * 2016-02-19 2016-06-08 蚌埠圻润环境工程科技有限公司 Combined chemical conditioning method for deep drying of dehydrated sludge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53110964A (en) * 1977-03-10 1978-09-28 Kurita Water Ind Ltd Dehydrating method for organic sludge
CN104071962A (en) * 2013-03-29 2014-10-01 湖南清和环保技术有限公司 Treatment method of river or lake sediments
CN104003602A (en) * 2014-06-16 2014-08-27 周旋辉 Method for improving dehydration performance of sludge through oxidizing organic matters in sludge
CN105645732A (en) * 2016-02-19 2016-06-08 蚌埠圻润环境工程科技有限公司 Combined chemical conditioning method for deep drying of dehydrated sludge

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