CN107935355A - A kind of method for promoting municipal sludge deep dehydration based on ferrikinetics - Google Patents
A kind of method for promoting municipal sludge deep dehydration based on ferrikinetics Download PDFInfo
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- CN107935355A CN107935355A CN201711187873.8A CN201711187873A CN107935355A CN 107935355 A CN107935355 A CN 107935355A CN 201711187873 A CN201711187873 A CN 201711187873A CN 107935355 A CN107935355 A CN 107935355A
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- Prior art keywords
- sludge
- municipal sludge
- organic molecule
- natural organic
- method described
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
Abstract
The present invention relates to a kind of method of the promotion municipal sludge deep dehydration based on ferrikinetics regulation and control.This method is：Natural organic molecule is added in municipal sludge, using iron species activate molecular oxygen present in natural organic molecule complexing sludge, produces active oxygen species, drives extracellular polymeric rupture release in municipal sludge to combine water, realizes deeply dehydrating sludge.This method utilizes iron species intrinsic in natural organic molecule activation municipal sludge, solve the problems, such as additionally to enter ferrous ion and hydrogen peroxide in Fenton conditioning sludge dewatering, the cost of high-level oxidation technology conditioning municipal sludge is reduced, there is efficient, non-selectivity, cost-effective, environmental-friendly, non-secondary pollution for sludge conditioning.
Description
Technical field
The invention belongs to Environmental science and technology field, and in particular to one kind promotes municipal sludge depth to take off based on ferrikinetics
The method of water.
Background technology
Municipal sludge is the inevitable outcome of city domestic sewage processing.Fast development and national sewage with urbanization
Treating capacity steeply rises, and the discharge capacity of sludge also sharply increases.It is estimated that arriving the year two thousand twenty, the municipal sludge yield in China will
Reach 6000~90,000,000 tons.After sludge without appropriate processing disposal enters environment, threat is not only constituted to ecological environment,
It also result in the serious wasting of resources at the same time.Therefore, there is an urgent need to develop sludge stabilizing, at innoxious and recycling processing
Put technology.
Sewage treatment plant of the current country passes through band after generally being nursed one's health using organic polymer coargulator excess sludge
Formula press filtration or centrifugation technique carry out preliminary hydro-extraction, and obtained moisture content of the cake is still up to more than 80wt%, it is difficult to reaches《Cities and towns
Sludge of sewage treatment plant disposes blended landfill shale》Index request in (GB/T 23485-2009) for blended landfill is (dirty
Mud moisture content≤60wt%).In recent years, obtained widely using Fenton high-level oxidation technology conditioning municipal sludge deep dehydration
Research, the moisture percentage in sewage sludge after being nursed one's health using this method are minimum up to 50% or so.But the additional ferrous ion of Fenton's reaction causes
Iron content increase in water body and sludge, forms secondary pollution, and ferrous ion is difficult to recycle, and causes the wasting of resources.
In addition, Fenton high-level oxidation technology Opsonizing method cost is high (80 yuan/ton), its application is set to receive a degree of limitation.
The content of the invention
The technical problems to be solved by the invention are in view of the deficiencies of the prior art, and to provide a kind of based on ferrikinetics to regulate and control
Promotion municipal sludge deep dehydration method.The method of the present invention is used for municipal sludge deep dehydration, and dehydrating effect is good, and cost
Low (40 yuan/ton), without additional ferrous ion and hydrogen peroxide, will not produce secondary pollution, the municipal sludge after processing just with fortune
It is defeated.
The present invention is to solve the problems, such as that used technical solution set forth above is：
A kind of method of the promotion municipal sludge deep dehydration based on ferrikinetics regulation and control, being added in municipal sludge naturally has
Machine small molecule, using the molecular oxygen dissolved in iron species activated sludge present in natural organic molecule complexing sludge, produces
Active oxygen species, drive extracellular polymeric rupture release in municipal sludge to combine water, realize municipal sludge deep dehydration.
By such scheme, the dosage of the natural organic molecule is preferably 20-250mg/g DS (butt), preferably
100-250mg/g DS (butt).
By such scheme, the municipal sludge is the municipal sludge by secondary settlement, and moisture content is 95~97wt%.
By such scheme, the natural small molecule organic compound is gallic acid, ascorbic acid, protocatechuic acid, winestone
One kind and its mixture in acid, oxalic acid, citric acid, acetic acid.
By such scheme, municipal sludge is stirred after the natural organic molecule of addition, system is not stirred,
Preferable effect can also be obtained.
By such scheme, Air Exposure is carried out to system in the dehydration process.
By such scheme, after the completion of above-mentioned dehydration, system after dehydration is subjected to centrifugal treating.
By such scheme, described natural organic molecule is added in municipal sludge carries out deep dehydration, without in addition
PH value in regulation system.
By such scheme, the processing time is 15-90min, is preferably 15-30min.
The technical principle of the present invention：
Municipal sludge is mainly by inorganic matter (SiO2,Al2O3, MgO, CaO etc.), organic matter (biological cell and big point of biology
Son) and metallic element (Fe, Ni, Co etc.) composition, the moisture in sludge for Free water and combine two major class of water.Free water refers to
The Interstitial Water surrounded by sludge, not with solid directly in conjunction with being relatively easy to separated under the effect of gravity.This part water accounts for
Total water 70%.Total water 30% is accounted for reference to water, refers to the internal water being enclosed in extracellular polymeric (EPS), this internal water
It is very close with solid bond, to remove these water, it is necessary to EPS rupture releases is combined water.It is more with reference to water content, sludge dewatering
It is more difficult.The method of promotion municipal sludge deep dehydration provided by the invention based on ferrikinetics regulation and control, by pending city
Natural organic molecule is introduced in political affairs sludge system, first, iron species intrinsic in sludge are complexed using natural organic molecule
The molecular oxygen dissolved in activated sludge, produces a large amount of H2O2.Secondly, Fe (II)/Fe in natural organic molecule regulation and control sludge
(III) circulate, the H of rapid catalytic decomposition generation2O2Substantial amounts of OH is produced, attack extracellular polymeric is allowed to rupture, final release
Deeply dehydrating sludge is realized with reference to water.Promoting municipal sludge deep dehydration process using the regulation and control ferrikinetics of natural organic molecule
In, natural organic molecule by oxidative degradation, can also further reduce the risk of secondary pollution.
The advantage of the invention is that：
1st, the present invention is complexed what is dissolved in iron species activated sludge intrinsic in municipal sludge using natural organic molecule
Molecular oxygen, original position produce hydrogen peroxide, and iron species lower valency Fe (II) content in conditioning of mud, decompose hydrogen peroxide and produce more
Hydroxyl radical free radical, makes EPS rupture release rapidly and combines water, dehydrating effect is good, and the moisture percentage in sewage sludge after being nursed one's health using this method is most
It is low up to 60% or so, municipal sludge after dehydration just with transport.Additional iron compound and hydrogen peroxide need not be introduced, not only
Reduce cost and reduce secondary pollution.
2nd, natural organic molecule general structure is simple, and content is high in nature, is widely present in environment, cheap easy
, it is environmentally friendly, aoxidize and degrade in repair process with pollutant, secondary pollution will not be caused.
3rd, the value that cost is low (40 yuan/ton), and operating procedure is simple, has practical application is nursed one's health.
4th, reaction condition is gentle, normal temperature and pressure can fast reaction, without complex appts, no danger is special without engaging
Industry personnel operate.
Brief description of the drawings
Fig. 1 nurses one's health municipal sludge dehydrating effect figure for the method for the present invention under different ascorbic acid dosages；
Fig. 2 is the method for the present invention municipal sludge dehydrating effect figure under different conditioning times；
Fig. 3 nurses one's health municipal sludge dehydrating effect figure for the method for the present invention under the conditions of different atmosphere；
Fig. 4 nurses one's health municipal sludge dehydrating effect for the method for the present invention using different natural organic molecules；
Embodiment
Carry out the content of the invention that the present invention will be described in detail below by specific implementation case, described specific embodiment is only used
To explain the present invention, it is not intended to limit the present invention.
Embodiment 1 nurses one's health municipal sludge dehydration under different ascorbic acid concentrations
Municipal sludge is derived from the secondary settlement sludge through certain sewage treatment plant, and ascorbic acid is added into 200g sludge and is consolidated
Body, the dosage for making ascorbic acid are respectively 50,100,150,200,250mg/g DS, without in addition adjusting pH.By reactant
System is uniform with magnetic stirrer, rotating speed 300rpm.At the same time to be not added with ascorbic acid as check experiment, monitoring conditioning respectively
The capillary water absorbing time (CST) of sludge afterwards, the result is shown in Figure 1.Shown in Fig. 1, with the initial dosage increase of ascorbic acid, CST values
Constantly reduce, CST slips gradually rise, and when ascorbic acid dosage is 150mg/g DS, sludge dewatering effect is best, CST
Reduced rate has reached 70%.
Embodiment 2 nurses one's health municipal sludge dehydration under different conditioning times
Municipal sludge is derived from the secondary settlement sludge through certain sewage treatment plant, and it is solid that ascorbic acid storage is added into 200g sludge
Body, the dosage for making ascorbic acid are 150mg/g DS, without in addition adjusting pH.Reaction system magnetic stirrer is equal
It is even, rotating speed 300rpm.The cases of dehydration of the municipal sludge after conditioning in 15,30,45,60,75,90 minutes is monitored respectively, as a result
See Fig. 1.Shown in Fig. 1, with the increase of conditioning time, CST, which is reduced, to take the lead in reducing after rise, when conditioning time is 30 minutes,
Sludge dewatering effect is best, and CST reduced rates have reached 70%.
Embodiment 3 nurses one's health municipal sludge dehydration under different atmosphere
Municipal sludge is derived from the secondary settlement sludge through certain sewage treatment plant, and it is solid that ascorbic acid storage is added into 200g sludge
Body, the dosage for making ascorbic acid are 150mg/g DS, without in addition adjusting pH.Reaction system magnetic stirrer is equal
Even, rotating speed 300rpm, is nursed one's health 30 minutes.(air, aeration, argon gas) municipal sludge dehydration feelings under different atmosphere are monitored respectively
Condition, the result is shown in Figure 1.Shown in Fig. 1, municipal sludge in air, aeration and argon gas, the reduced rate of CST respectively reaches 70%,
73%th, 48%.
Embodiment 4 utilizes different natural organic molecule conditioning municipal sludges
Municipal sludge is derived from the secondary settlement sludge through certain sewage treatment plant, and gallic acid is added into 200g sludge, is resisted
Bad hematic acid, protocatechuic acid, tartaric acid, oxalic acid, citric acid, acetic acid, make anti-gallic acid, ascorbic acid, protocatechuic acid, winestone
Acid, oxalic acid, citric acid, the dosage of acetic acid are 150mg/g DS, without in addition adjusting pH.By reaction system magnetic stirring apparatus
Stir evenly, rotating speed 300rpm, nurse one's health 30 minutes.The dehydration of the different natural organic molecule conditioning municipal sludges of monitoring respectively
Situation, the result is shown in Figure 1.Shown in Fig. 1, municipal sludge is in gallic acid, ascorbic acid, protocatechuic acid, tartaric acid, oxalic acid, lemon
CST reduced rates have respectively reached 52%, 70%, 64%, 54%, 59%, 48%, 68% after acid, acetic acid conditioning.
Embodiment 5 utilizes ascorbic acid conditioning municipal sludge frame dehydration experiment
Political affairs sludge is derived from the secondary settlement sludge through certain sewage treatment plant, and ascorbic acid is added into 30kg sludge, makes to resist
The dosage of bad hematic acid is 150mg/g DS, without in addition adjusting pH.Reaction system is stirred continuously, rotating speed 300rpm, adjusted
Reason 30 minutes.After the completion of conditioning, press filtration obtains mud cake, is computed：The dehydration efficiency of sludge is up to 80%, and moisture content of the cake is
61%.
Claims (10)
- A kind of 1. method of the promotion municipal sludge deep dehydration based on ferrikinetics regulation and control, it is characterised in that：In municipal sludge Natural organic molecule is added, utilizes point dissolved in iron species activated sludge present in natural organic molecule complexing sludge Sub- oxygen, produces active oxygen species, drives extracellular polymeric rupture release in municipal sludge to combine water, realizes that municipal sludge depth takes off Water.
- 2. according to the method described in claim 1, it is characterized in that：The dosage of the natural organic molecule is 50- 250mg/gDS。
- 3. according to the method described in claim 1, it is characterized in that：The dosage of the natural organic molecule is 100- 250mg/g DS。
- 4. according to the method described in claim 1, it is characterized in that：The municipal sludge is dirty by the municipal administration of secondary settlement Mud, moisture content are 95~97wt%.
- 5. according to the method described in claim 1, it is characterized in that：The natural small molecule organic compound for gallic acid, One kind and its mixture in ascorbic acid, protocatechuic acid, tartaric acid, oxalic acid, citric acid, acetic acid.
- 6. according to the method described in claim 1, it is characterized in that：It is described to add after natural organic molecule to municipal sludge It is stirred.
- 7. according to the method described in claim 1, it is characterized in that：System is carried out at aeration in the dehydration process Reason.
- 8. according to the method described in claim 1, it is characterized in that：After the completion of dehydration, system after dehydration is centrifuged Processing.
- 9. according to the method described in claim 1, it is characterized in that：It is described that natural organic molecule is added in municipal sludge Deep dehydration is carried out, without the pH value in other regulation system.
- 10. according to the method described in claim 1, it is characterized in that：The processing time is 15-90min.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111410339A (en) * | 2020-04-15 | 2020-07-14 | 华中师范大学 | Method for pretreating kitchen waste leachate based on molecular oxygen activation and enhanced flocculation |
| CN112811783A (en) * | 2021-01-14 | 2021-05-18 | 华中科技大学 | Sludge conditioning and dewatering method for activating molecular oxygen by sludge-based iron-rich biochar |
| CN112811566A (en) * | 2021-01-14 | 2021-05-18 | 昆明理工大学 | photo-Fenton reaction system and application |
| CN115140922A (en) * | 2022-07-11 | 2022-10-04 | 中电智能技术南京有限公司 | Composite conditioner for dewatering high-organic-matter municipal sludge and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63242309A (en) * | 1987-03-31 | 1988-10-07 | Sanyo Chem Ind Ltd | Dehydrating agent and dehydration process |
| CN102173500A (en) * | 2011-02-25 | 2011-09-07 | 华中师范大学 | Method for treating water by Fenton oxidization of activated molecular oxygen |
| CN104649533A (en) * | 2015-02-05 | 2015-05-27 | 宇星科技发展(深圳)有限公司 | Compound conditioning and deep dewatering method of sludge |
| CN105236701A (en) * | 2014-06-30 | 2016-01-13 | 北京中科国通环保工程技术有限公司 | Method for dehydrating sludge by utilizing bioleaching sludge co-conditioning |
| CN106746483A (en) * | 2017-02-10 | 2017-05-31 | 周毅 | The agent of compound type sludge decrement, preparation method and applications |
| CN106975655A (en) * | 2017-04-28 | 2017-07-25 | 华中师范大学 | A kind of method repaired based on the organic contamination place soil in situ chemical oxidation that ferrikinetics regulates and controls |
-
2017
- 2017-11-24 CN CN201711187873.8A patent/CN107935355A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63242309A (en) * | 1987-03-31 | 1988-10-07 | Sanyo Chem Ind Ltd | Dehydrating agent and dehydration process |
| CN102173500A (en) * | 2011-02-25 | 2011-09-07 | 华中师范大学 | Method for treating water by Fenton oxidization of activated molecular oxygen |
| CN105236701A (en) * | 2014-06-30 | 2016-01-13 | 北京中科国通环保工程技术有限公司 | Method for dehydrating sludge by utilizing bioleaching sludge co-conditioning |
| CN104649533A (en) * | 2015-02-05 | 2015-05-27 | 宇星科技发展(深圳)有限公司 | Compound conditioning and deep dewatering method of sludge |
| CN106746483A (en) * | 2017-02-10 | 2017-05-31 | 周毅 | The agent of compound type sludge decrement, preparation method and applications |
| CN106975655A (en) * | 2017-04-28 | 2017-07-25 | 华中师范大学 | A kind of method repaired based on the organic contamination place soil in situ chemical oxidation that ferrikinetics regulates and controls |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111410339A (en) * | 2020-04-15 | 2020-07-14 | 华中师范大学 | Method for pretreating kitchen waste leachate based on molecular oxygen activation and enhanced flocculation |
| CN112811783A (en) * | 2021-01-14 | 2021-05-18 | 华中科技大学 | Sludge conditioning and dewatering method for activating molecular oxygen by sludge-based iron-rich biochar |
| CN112811566A (en) * | 2021-01-14 | 2021-05-18 | 昆明理工大学 | photo-Fenton reaction system and application |
| CN112811783B (en) * | 2021-01-14 | 2022-04-12 | 华中科技大学 | Sludge conditioning and dewatering method for activating molecular oxygen by sludge-based iron-rich biochar |
| CN115140922A (en) * | 2022-07-11 | 2022-10-04 | 中电智能技术南京有限公司 | Composite conditioner for dewatering high-organic-matter municipal sludge and preparation method thereof |
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