CN106746478A - A kind of method using new dual oxidants system enhancement dewatering performance of sludge - Google Patents
A kind of method using new dual oxidants system enhancement dewatering performance of sludge Download PDFInfo
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- CN106746478A CN106746478A CN201611144493.1A CN201611144493A CN106746478A CN 106746478 A CN106746478 A CN 106746478A CN 201611144493 A CN201611144493 A CN 201611144493A CN 106746478 A CN106746478 A CN 106746478A
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- CN
- China
- Prior art keywords
- sludge
- kmno
- activated sludge
- dewatering
- pms
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
-
- 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
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
Abstract
The present invention relates to sludge dewatering field, disclose a kind of with using the method for new dual oxidants system enhancement dewatering performance of sludge.The present invention is realized by following steps：First, KMnO is prepared4The aqueous solution and KHSO5The aqueous solution；2nd, to adding KMnO in activated sludge4Solution, mixes 30 ~ 60 min；3rd, KHSO is added5Solution, reacts 240 ~ 360 min, you can the method for completing new dual oxidants system enhancement dewatering performance of sludge.Use KMnO of the invention4And KHSO5Dual oxidants system can be in oxidation activity sludge organic matter, improve the dewatering of activated sludge.Two kinds of oxidants being used are cheap, environmental protection, possess the potentiality in water treatment plant and sewage treatment plant's popularization and application, possess good social benefit.
Description
（One）Technical field
The invention belongs to sludge dewatering technical field, and in particular to one kind utilizes new dual oxidants system enhancement dehydration property
The method of energy.
（Two）Background technology
Produced by human lives and industrial production and discharge sewage have to pass through process it is up to standard after can just be discharged into natural water
In.The method of sewage disposal is various, and wherein activated sludge process is most popular biochemical wastewater treatment mainstream technology.Its is extensive
Using substantial amounts of residual active sludge is inevitably resulted from, China produces 3512.5 ten thousand tons of residual active sludge in 2015.
Although the sewage of separate sources produces the activated sludge of different compositions and property, mostly contain in the residual active sludge of its discharge
There are heavy metal, pathogen, viral micro-organisms etc., these Substances on Ecological Environment and human health have certain harmfulness, because
This, it is necessary to residual active sludge is disposed in safely and reasonably treatment.Currently, China's residual active sludge handling rate is not high, process skill
Art is in urgent need to be improved, treatment intervention level and comprehensive utilization technique in the urgent need to improving residual active sludge.Treatment of Sludge with
In disposal, sludge conditioning is an essential step, and it is mainly and changes sludge quality by chemistry, physics and biological method,
The ordered state of sludge colloidal particle is adjusted, typical repulsive force is overcome, its affinity with water is reduced, increase flco cohesiveness,
Particle size, so as to improve dewatering performance of sludge, improves final filter cake solid content.Relative to physics conditioning and biological conditioning, change
Learn conditioning because it is simple to operate, low for equipment requirements, cost is relatively low the advantages of and often turn into first-selection.
In recent years, based on potentiometric titrations（SO4 -·）High-level oxidation technology is being widely used in going for Organic substance in water
Remove.With OH（E 0=+1.8-2.7 V）Compare, SO under neutrallty condition4 -Possesses standard electrode potential higher（E 0=+2.5-
3.1 V）, there is stronger selectivity to target contaminant.Additionally, SO4 -With longer half-life period（4 s, OH's partly declines
Phase is 1 μ s）, its continuous contact time with target contaminant can be extended, so that oxide target pollutant in a higher degree.
SO4 -Can be by activating potassium hydrogen persulfate composite salts Oxone（Its main active substances is potassium hydrogen persulfate KHSO5
（Peroxymonosulfate, PMS））Produce.PMS belongs to H2O2Derivative, standard electrode potentialE 0=+1.82 V, be higher than
H2O2（E 0=+1.76 V）And KMnO4（E 0=+1.68 V）, it is a kind of stronger oxidant, it is widely used in disappearing for swimming-pool water
Poison.In the case of non-activated, Oxone is limited to the oxidability of organic pollution, but in presence such as transition metal ions
Under the conditions of can produce Strong oxdiative activity SO4 -, efficiently remove removal organic polluter.
（Three）The content of the invention
The present invention is first by KMnO4With the dewatering that PMS dual oxidants systems are applied to improve activated sludge, energy the efficient oxidation
Organic matter in activated sludge, so as to improve the dewatering of activated sludge.
The technical proposal for solving the technical problem of the invention is：
A kind of method using new dual oxidants system enhancement dewatering performance of sludge, is specifically carried out according to the following steps：
First, 1 mol/L KMnO are prepared4The aqueous solution and 1 mol/L potassium hydrogen persulfates（PMS）The aqueous solution；
2nd, to adding KMnO in activated sludge4The aqueous solution：The KMnO that will be prepared4The aqueous solution is added in activated sludge, and mixing is stirred
Mix 30 ~ 60 min；
2nd, to adding potassium hydrogen persulfate in activated sludge（PMS）The aqueous solution：The PMS aqueous solution that will be prepared is added to activated sludge
In, react 240 ~ 360 min.
Preferably, KMnO in step 24Concentration in activated sludge is solid for 2.0 ~ 4.0 mmol/g volatility suspend
Body（Volatile Suspended Solid, VSS）.
Preferably, concentration of the PMS in activated sludge is 1.0 ~ 2.0 mmol/g VSS in step 3.
Mn oxide possesses good catalysis activity, catalysis activity symbol of the different metal oxides in PMS solution to PMS
Close following rule：Mn3O4 > Co3O4 > Fe3O4The Mn oxide of the different states of oxidation shows different catalytics to PMS
Can, and meet Mn2O3 > MnO > Mn3O4 >MnO2Rule.The catalysis activity to PMS of Mn oxide additionally depends on its shape
Looks and crystalline phase.It is well known that KMnO4Newly created MnO2 can be generated during oxidation of organic compounds.Nascent state
Manganese dioxide has active, good characterization of adsorption and certain coagulation turbidity removing effect very high.Based on this, we attempt by
KMnO4It is used in combination with PMS dual oxidants, is applied to improve the dewatering of sludge.By KMnO4It is organic in oxidized sludge
The newly created MnO2 formed during thing and extracellular polymeric, is capable of efficient catalytic PMS generation Strong oxdiative activity
SO4 -So as to improve the dewatering of sludge.Two kinds of oxidants being used are cheap, environmental protection, possess good city
Field application prospect.
The mechanism of this patent is to utilize KMnO4The nascent state water formed during oxidation of organic compounds and extracellular polymeric
Close the SO that manganese dioxide activation PMS produces Strong oxdiative activity4 -, so as to improve the dewatering of activated sludge.
The present invention has the beneficial effect that：
1. KMnO4The newly created MnO2 formed in oxidizing process possesses efficient catalysis activity to PMS, produces
SO4 -Organic matter that can be in oxidation activity sludge, improves the dewatering of activated sludge.
2. KMnO4, environmental protection cheap with PMS, possesses in water treatment plant and sewage treatment plant's popularization and application
Potentiality, possess good social benefit.
（Four）Brief description of the drawings
Fig. 1 be embodiment 1, comparative example 1 ~ 2 in activated sludge dehydration effect with the reaction time change curve.
（Five）Specific embodiment
Technical solution of the present invention is not limited to specific implementation method exemplified below, also including any group between each specific embodiment
Close.In order to verify beneficial effects of the present invention, using the lattice sludge sewage of Hangzhou seven as process object, selection is dirty
Mud capillary water absorbing time（CST）For evaluation index carries out following experiment：
Embodiment 1：Using KMnO4The experiment being dehydrated to activated sludge with PMS, is carried out by the following method：
The KMnO that will first prepare4The aqueous solution is added in activated sludge, KMnO4Concentration is 2.0 mmol/g in activated sludge
VSS, mixes 30 min；Then the PMS aqueous solution that will be prepared is added in activated sludge, PMS concentration in activated sludge
It is 1.0 mmol/g VSS, reacts 240 min.
Comparative example 1：Using KMnO4The experiment being dehydrated to activated sludge, is carried out by the following method：
The KMnO that will be prepared4Solution is added in activated sludge, KMnO4Concentration is 2.0 mmol/g VSS in activated sludge,
Mix 30 min.
Comparative example 2：The experiment being dehydrated to activated sludge using PMS, is carried out by the following method：
The PMS solution that will be prepared is added in activated sludge, and PMS concentration in activated sludge is 1.0 mmol/g VSS, mixing
Stir 30 min.
Activated sludge dehydration effect is shown in Fig. 1 with the change curve in reaction time in embodiment 1, comparative example 1 ~ 2.From figure
As can be seen that individually adding KMnO4Or PMS, the dewatering of activated sludge does not have sideline to be changed；And by KMnO4And PMS
The dewatering that can significantly improve activated sludge is used in combination.As can be seen here, KMnO4Can be with bright with PMS dual oxidants system
The aobvious dewatering for improving activated sludge, has a good application prospect.
Below the preferred embodiments of the invention are only listed, protection scope of the present invention is not restricted to this, this area
Any change that technical staff is made within the scope of the invention as claimed is each fallen within the scope of the present invention.
Claims (3)
1. a kind of method using new dual oxidants system enhancement dewatering performance of sludge, it is characterised in that comprise the following steps：
First, 1 mol/L KMnO are prepared4The aqueous solution and 1 mol/L potassium hydrogen persulfates（PMS）The aqueous solution；
2nd, to adding KMnO in activated sludge4Solution：The KMnO that will be prepared4Solution is added in activated sludge, and mixing 30 ~
60 min；
3rd, to adding hydrogen persulfate potassium solution in activated sludge：The hydrogen persulfate potassium solution that will be prepared is added in activated sludge,
240 ~ 360 min of reaction.
2. the method for claim 1, its feature is in KMnO described in step 24Concentration in activated sludge for 2.0 ~
4.0 mmol/g VSSs.
3. the method for claim 1, its feature is in concentration of the PMS in activated sludge is 1.0 ~ 2.0 in step 3
Mmol/g VSSs.
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| CN201611144493.1A CN106746478A (en) | 2016-12-13 | 2016-12-13 | A kind of method using new dual oxidants system enhancement dewatering performance of sludge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109336353A (en) * | 2018-12-07 | 2019-02-15 | 杭州萧山环境投资发展有限公司 | A kind of online Opsonizing method of deeply dehydrating sludge |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003064336A1 (en) * | 2002-01-29 | 2003-08-07 | Ondeo Nalco Company | Method of dewatering sludge using enzymes |
| CN102180540A (en) * | 2011-03-24 | 2011-09-14 | 哈尔滨工业大学 | Water treatment medicament for eliminating pollution through oxidation of high-activity intermediate state pentavalent manganese |
| CN103319066A (en) * | 2012-03-23 | 2013-09-25 | 宇星科技发展(深圳)有限公司 | Sludge deep dehydration method |
| CN103359899A (en) * | 2013-08-07 | 2013-10-23 | 湖南大学 | Deep dewatering pretreatment of sludge |
| CN103663666A (en) * | 2013-12-30 | 2014-03-26 | 武汉大学 | Method for carrying out cooperative oxidation treatment on organic wastewater by potassium permanganate and potassium hydrogen persulfate |
| CN105776785A (en) * | 2016-01-18 | 2016-07-20 | 同济大学 | Diluting, conditioning and curing treatment method for sludge subjected to non-standardized treatment |
-
2016
- 2016-12-13 CN CN201611144493.1A patent/CN106746478A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003064336A1 (en) * | 2002-01-29 | 2003-08-07 | Ondeo Nalco Company | Method of dewatering sludge using enzymes |
| CN102180540A (en) * | 2011-03-24 | 2011-09-14 | 哈尔滨工业大学 | Water treatment medicament for eliminating pollution through oxidation of high-activity intermediate state pentavalent manganese |
| CN103319066A (en) * | 2012-03-23 | 2013-09-25 | 宇星科技发展(深圳)有限公司 | Sludge deep dehydration method |
| CN103359899A (en) * | 2013-08-07 | 2013-10-23 | 湖南大学 | Deep dewatering pretreatment of sludge |
| CN103663666A (en) * | 2013-12-30 | 2014-03-26 | 武汉大学 | Method for carrying out cooperative oxidation treatment on organic wastewater by potassium permanganate and potassium hydrogen persulfate |
| CN105776785A (en) * | 2016-01-18 | 2016-07-20 | 同济大学 | Diluting, conditioning and curing treatment method for sludge subjected to non-standardized treatment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109336353A (en) * | 2018-12-07 | 2019-02-15 | 杭州萧山环境投资发展有限公司 | A kind of online Opsonizing method of deeply dehydrating sludge |
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