CN108892356A - The processing method of heavy metal in a kind of municipal sludge - Google Patents
The processing method of heavy metal in a kind of municipal sludge Download PDFInfo
- Publication number
- CN108892356A CN108892356A CN201810862099.4A CN201810862099A CN108892356A CN 108892356 A CN108892356 A CN 108892356A CN 201810862099 A CN201810862099 A CN 201810862099A CN 108892356 A CN108892356 A CN 108892356A
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- Prior art keywords
- sludge
- heavy metal
- parts
- catalyst
- processing method
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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
-
- 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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
Abstract
The processing method of heavy metal, is related to environment protection field in a kind of municipal sludge, and sludge and sludge treating agent, catalyst are mixed to get mixture；Mixture is subjected to filters pressing again.Sludge treating agent is made of oxidant and heavy metal stabilizer, can be stabilized to the heavy metal in sludge, and pollution of the heavy metal to environment is reduced.Oxidant can carry out oxidative degradation to organic matter, and catalyst then can be with the degradation of catalyzing organic, to prevent sludge from occurring degenerating smelly phenomenon.Its operating method is simple, not high to equipment requirement, can efficiently remove the impurity such as heavy metal, the organic matter in municipal sludge, be appropriate for promoting the use of.
Description
Technical field
The present invention relates to environment protection fields, in particular to a kind of processing method of heavy metal in municipal sludge.
Background technique
With the fast development of social economy and urbanization, municipal wastewater discharge amount and treating capacity constantly increase in city,
A large amount of sludge caused by municipal wastewater processing bring new challenge to The Surroundings in Cities management.The water content of municipal sludge exists
90% or more, jelly, have the characteristics that volume is big, light specific gravity, easy corruption distribute stench, the processing and conveyer belt to sludge come
It is difficult.And containing various objectionable impurities such as a large amount of bacterium, virus, worm's ovum, heavy metals in municipal sludge, if dealt with improperly
It is easy to cause serious problem of environmental pollution and safe and healthy problem.
The dehydration of sludge refers to using the method for physics and chemistry, and the moisture content of sludge is reduced to 60% or less.Dehydration
Sludge afterwards not only transports, it is more convenient to deal with, but also its calorific value with higher, can be used for power generation by waste combustion, has
Preferable using energy source value.How while being preferably dehydrated, carrying out harmless treatment to municipal sludge is the neck
The important directions of domain development.
Summary of the invention
The purpose of the present invention is to provide a kind of processing methods of heavy metal in municipal sludge, and operating method is simple, right
Equipment requirement is not high, can effectively remove the impurity such as heavy metal, the organic matter in municipal sludge.
What the embodiment of the present invention was realized in：
Dewatered sludge and sludge treating agent, catalyst are mixed to get mixture；The mixture is subjected to filters pressing；
Wherein, in parts by weight, the sludge treating agent includes：150~250 parts of oxidant, heavy metal stabilizer
100~200 parts；The catalyst is rare metal oxide.
The beneficial effect of the embodiment of the present invention is：
The embodiment of the invention provides a kind of processing methods of heavy metal in municipal sludge, by sludge and Treatment of Sludge
Agent, catalyst are mixed to get mixture；Mixture is subjected to filters pressing again.Sludge treating agent is by oxidant and heavy metal stabilizer structure
At can be stabilized to the heavy metal in sludge, reduce pollution of the heavy metal to environment.Oxidant can to organic matter into
Row oxidative degradation, and catalyst then can be with the degradation of catalyzing organic, to prevent sludge from occurring degenerating smelly phenomenon.It is grasped
It is simple to make method, it is not high to equipment requirement, the impurity such as heavy metal, the organic matter in municipal sludge can be efficiently removed, are suitble to
It is promoted the use of.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
The processing method of heavy metal in a kind of municipal sludge of the embodiment of the present invention is specifically described below.
The embodiment of the invention provides a kind of processing methods of heavy metal in municipal sludge comprising：
Dewatered sludge and sludge treating agent, catalyst are mixed to get mixture；The mixture is subjected to filters pressing.
The water content of municipal sludge is 90% or more, and jelly, with volume, big, light specific gravity, easy corruption distribute stench etc.
Feature, processing and conveyer belt to sludge come difficult.And contain a large amount of bacterium, virus, worm's ovum, heavy metal in municipal sludge
Etc. various objectionable impurities, serious problem of environmental pollution and safe and healthy problem are be easy to cause if dealt with improperly.
Wherein, in parts by weight, sludge treating agent includes：150~250 parts of oxidant, heavy metal stabilizer 100~
200 parts.
Further, heavy metal stabilizer includes at least one of phosphate, bentonite, lime stone and vulcanized sodium.
Heavy metal stabilizer can stablize the heavy metal ion in sludge by the modes such as being complexed, adsorb, prevent heavy metal from
Son can be discharged into environment, and pollute the environment.Wherein, phosphate, lime stone, vulcanized sodium is mainly by way of complexing, with
Heavy metal ion forms hydroxide, the sulfide etc. of indissoluble, achievees the effect that stable.And bentonite then passes through it and preferably inhales
Attached performance, adsorbs heavy metal ion, to achieve the effect that stable.Preferably, according to parts by weight, the heavy metal
Stabilizer includes：25~50 parts of phosphate, 30~60 parts of bentonite, 30~60 parts of lime stone and 10~25 parts of vulcanized sodium.It presses
It is preferable for the stablizing effect of heavy metal ion according to the heavy metal stabilizer that aforementioned proportion is formulated.
Further, oxidant includes at least one of potassium permanganate, potassium ferrate, ammonium persulfate, potassium peroxydisulfate.Oxygen
Agent can aoxidize the organic matter in sludge, promote the degradation of organic matter, achieve the purpose that anti-corrosion deodorization.Preferably,
According to parts by weight, the oxidant includes：30~45 parts of potassium permanganate, 15~32 parts of potassium ferrate, ammonium persulfate 54~72
Part and 54~72 parts of potassium peroxydisulfate.The oxidant being formulated according to aforementioned proportion, the oxidation for organic matter in sludge
Degradation effect is preferable.
Catalyst is rare metal oxide, it is preferable that catalyst includes at least one of antimony oxide and terbium oxide,
It is made by high temperature.Catalyst can promote oxidant to the oxidation reaction of organic matter, thus preferably to organic matter into
Row degradation.
Further, in embodiments of the present invention, the mass ratio of sludge, sludge treating agent and catalyst is 1：0.2~
0.8：0.02~0.1.Inventor has found by creative work, by sludge, sludge treating agent and catalyst according to aforementioned proportion
It is preferable for the removal effect of the impurity such as Heavy Metals in Sludge, organic matter after mixing.
Preferably, when being mixed sludge with sludge treating agent, catalyst, addition water makes the aqueous of the mixture
Amount is 35%~99%.Addition water can increase the mobile performance of sludge, keep sludge and sludge treating agent, catalyst more preferable
Hybrid reaction.
Further, sludge and the sludge treating agent, catalyst mixed process in, it is first that sludge is steady with heavy metal
Determine agent mixing, then is mixed with oxidant and catalyst.Containing reducing substances such as vulcanized sodium in heavy metal stabilizer, in order to reduce
It causes stablizing effect to reduce with oxidant reaction, can be first by heavy metal stabilizer and sludge reaction, with heavy metal ion shape
After stable compound, oxidant and catalyst are added.
Further, sludge, sludge treating agent and catalyst be stirred to 2 under the revolving speed of 100~2000r/min~
400min.Under the above conditions, mixing is more abundant, and sludge, sludge treating agent and catalyst three can be allowed more sufficient
Hybrid reaction.
Feature and performance of the invention are described in further detail with reference to embodiments.
Embodiment 1
The present invention provides a kind of processing method of heavy metal in municipal sludge comprising：
S1. by sludge and sludge treating agent, catalyst according to 1:0.8:0.1 mass ratio carries out adding water and stirring mixing, obtains
The mixture for being 35% to water content；
Wherein, in parts by weight, sludge treating agent includes：
30 parts of potassium permanganate, 32 parts of potassium ferrate, 54 parts of ammonium persulfate, 72 parts of potassium peroxydisulfate, 25 parts of phosphate, bentonite
60 parts, 30 parts of lime stone and 10 parts of vulcanized sodium；Catalyst is antimony oxide；The revolving speed being stirred is 100r/min, and the time is
400min。
S2. filters pressing is carried out to said mixture.
Embodiment 2
The present invention provides a kind of processing method of heavy metal in municipal sludge comprising：
S1. by sludge and sludge treating agent, catalyst according to 1:0.2:0.05 mass ratio carries out adding water and stirring mixing, obtains
The mixture for being 40% to water content；
Wherein, in parts by weight, sludge treating agent includes：
45 parts of potassium permanganate, 15 parts of potassium ferrate, 72 parts of ammonium persulfate, 54 parts of potassium peroxydisulfate, 50 parts of phosphate, bentonite
30 parts, 60 parts of lime stone and 25 parts of vulcanized sodium；Catalyst is antimony oxide；The revolving speed being stirred is 2000r/min, time
For 5min.
S2. filters pressing is carried out to said mixture.
Embodiment 3
The present invention provides a kind of processing method of heavy metal in municipal sludge comprising：
S1. by sludge and sludge treating agent, catalyst according to 1:0.5:0.02 mass ratio carries out adding water and stirring mixing, obtains
The mixture for being 45% to water content；
Wherein, in parts by weight, sludge treating agent includes：
40 parts of potassium permanganate, 20 parts of potassium ferrate, 60 parts of ammonium persulfate, 60 parts of potassium peroxydisulfate, 40 parts of phosphate, bentonite
40 parts, 50 parts of lime stone and 20 parts of vulcanized sodium；Catalyst is terbium oxide；The revolving speed being stirred is 1000r/min, time
For 20min.
S2. filters pressing is carried out to said mixture.
Embodiment 4
The present invention provides a kind of processing method of heavy metal in municipal sludge comprising：
S1. by sludge and sludge treating agent, catalyst according to 1:0.2:0.02 mass ratio carries out adding water and stirring mixing, obtains
The mixture for being 55% to water content；
Wherein, in parts by weight, sludge treating agent includes：
60 parts of potassium permanganate, 70 parts of ammonium persulfate, 65 parts of potassium peroxydisulfate, 30 parts of phosphate, 30 parts of bentonite, and vulcanization
65 parts of sodium；Catalyst is terbium oxide；The revolving speed being stirred is 200r/min, time 300min.
S2. filters pressing is carried out to said mixture.
Test example 1
Choose processing method treated the sludge of heavy metal in municipal sludge provided by Examples 1 to 4, and with without
The sludge of processing as a comparison case, is tested the content of Heavy Metals ion and organic matter in its leachate, test
The results are shown in Table 1.
1 sludge indices test result of table
As can be seen from Table 1, using the processing of heavy metal in a kind of municipal sludge provided by the embodiment of the present invention 1~4
After method is processed, the content of Heavy Metals ion and organic matter in the leachate of sludge is well below limit value, explanation
The processing method of heavy metal is for the stabilization of heavy metal ion and right in a kind of municipal sludge provided by the embodiment of the present invention
The degradation effect of organic matter is preferable.
In conclusion the embodiment of the invention provides a kind of processing method of heavy metal in municipal sludge, by sludge with
Sludge treating agent, catalyst are mixed to get mixture；Mixture is subjected to filters pressing again.Sludge treating agent is by oxidant and heavy metal
Stabilizer is constituted, and can be stabilized to the heavy metal in sludge, and pollution of the heavy metal to environment is reduced.Oxidant can be right
Organic matter carries out oxidative degradation, and catalyst then can be with the degradation of catalyzing organic, so that it is smelly to prevent sludge from corruption occur
Phenomenon.Its operating method is simple, not high to equipment requirement, can efficiently remove heavy metal, organic matter etc. in municipal sludge
Impurity is appropriate for promoting the use of.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. the processing method of heavy metal in a kind of municipal sludge, which is characterized in that including：
Dewatered sludge and sludge treating agent, catalyst are mixed to get mixture；The mixture is subjected to filters pressing；
Wherein, in parts by weight, the sludge treating agent includes：150~250 parts of oxidant, heavy metal stabilizer 100~
200 parts；The catalyst is rare metal oxide.
2. the processing method of heavy metal in municipal sludge according to claim 1, which is characterized in that the sludge, described
The mass ratio of sludge treating agent and the catalyst is 1：0.2~0.8：0.02~0.1.
3. the processing method of heavy metal in municipal sludge according to claim 1 or 2, which is characterized in that the oxidant
Including at least one of potassium permanganate, potassium ferrate, ammonium persulfate, potassium peroxydisulfate.
4. the processing method of heavy metal in municipal sludge according to claim 3, which is characterized in that according to parts by weight,
The oxidant includes：
30~45 parts of potassium permanganate, 15~32 parts of potassium ferrate, 54~72 parts of ammonium persulfate and 54~72 parts of potassium peroxydisulfate.
5. the processing method of heavy metal in municipal sludge according to claim 1 or 2, which is characterized in that the heavy metal
Stabilizer includes at least one of phosphate, bentonite, lime stone and vulcanized sodium.
6. the processing method of heavy metal in municipal sludge according to claim 5, which is characterized in that according to parts by weight,
The heavy metal stabilizer includes：
25~50 parts of phosphate, 30~60 parts of bentonite, 30~60 parts of lime stone and 10~25 parts of vulcanized sodium.
7. the processing method of heavy metal in municipal sludge according to claim 1, which is characterized in that the catalyst includes
At least one of antimony oxide and terbium oxide.
8. the processing method of heavy metal in municipal sludge according to claim 1, which is characterized in that by the sludge, institute
It states sludge treating agent and the catalyst is stirred 2~400min under the revolving speed of 100~2000r/min.
9. the processing method of heavy metal in municipal sludge according to claim 8, which is characterized in that in the sludge and institute
In the mixed process for stating sludge treating agent, the catalyst, addition water makes the water content 35%~99% of the mixture.
10. the processing method of heavy metal in municipal sludge according to claim 9, which is characterized in that the sludge with
The sludge treating agent, the catalyst mixed process in, first the sludge is mixed with the heavy metal stabilizer, then with
The oxidant and catalyst mixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810862099.4A CN108892356A (en) | 2018-08-01 | 2018-08-01 | The processing method of heavy metal in a kind of municipal sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810862099.4A CN108892356A (en) | 2018-08-01 | 2018-08-01 | The processing method of heavy metal in a kind of municipal sludge |
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| CN108892356A true CN108892356A (en) | 2018-11-27 |
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| CN201810862099.4A Pending CN108892356A (en) | 2018-08-01 | 2018-08-01 | The processing method of heavy metal in a kind of municipal sludge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112876120A (en) * | 2021-02-05 | 2021-06-01 | 上海复洁环保科技股份有限公司 | Sludge incineration ash-based composite admixture and preparation method and application thereof |
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Patent Citations (4)
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| CN102976578A (en) * | 2012-12-21 | 2013-03-20 | 湖南清和环保技术有限公司 | Method for treating sand-containing sludge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112876120A (en) * | 2021-02-05 | 2021-06-01 | 上海复洁环保科技股份有限公司 | Sludge incineration ash-based composite admixture and preparation method and application thereof |
| CN112876120B (en) * | 2021-02-05 | 2023-02-17 | 上海复洁环保科技股份有限公司 | Sludge incineration ash-based composite admixture and preparation method and application thereof |
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