CN106746483A - The agent of compound type sludge decrement, preparation method and applications - Google Patents
The agent of compound type sludge decrement, preparation method and applications Download PDFInfo
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- CN106746483A CN106746483A CN201710074980.3A CN201710074980A CN106746483A CN 106746483 A CN106746483 A CN 106746483A CN 201710074980 A CN201710074980 A CN 201710074980A CN 106746483 A CN106746483 A CN 106746483A
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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
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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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
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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
- C02F11/121—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
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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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
-
- 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
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention relates to field of sludge treatment, specifically, there is provided a kind of agent of compound type sludge decrement, preparation method and applications.Compound type sludge decrement agent includes conditioner and exciting agent；Wherein, conditioner includes at least one acid, Fe2+Ion and optionally metal ion, the acid are organic acid or inorganic acid；Exciting agent includes hydrogen peroxide.The decrement agent uses Fe2+Catalyzing and decomposing H2O2, the hydroxyl radical free radical (OH) of strong oxidizing property is generated, hydroxyl radical free radical can make it degrade with the effect of most of organic matters, and the combination water in release activated sludge, sludge dewatering effect is good, and reduced training is substantially, environmentally friendly and good in economic efficiency.
Description
Technical field
The present invention relates to field of sludge treatment, in particular to a kind of agent of compound type sludge decrement, preparation method and its
Using.
Background technology
With the development of the city with the continuous expansion of urban population, industrial wastewater increasingly increases with the discharge capacity of sanitary sewage
It is many.Excess sludge produced by sewage treatment plant, typically contains substantial amounts of organic matter, abundant nitrogen, phosphorus, potassium and trace element,
Can effectively utilize；But, due to the harmful chemical, bacterium, microorganism, parasite and the heavy metal that are decomposed containing some hardly possiblies
Deng can cause serious harm to environment if dealt with improperly, after discharge.Therefore, properly, scientifically treatment sludge is increasingly received
To the concern of people, also as water treatment field focus of attention.
Treatment of Sludge includes concentration, digestion (bioanalysis digestion, sludge composting, pyrolysis and chemically stable), is dehydrated, dries
Deng；Sludge treatment method common at present has landfill method, ocean dumping, sludge incineration, Land_use change, construction material utilization, dirt
Mud turning sludge into fuel, sludge animal feed, sludge modification adsorbent etc..But specific resistance to filtration expense is still very high, its expense is accounted for
The 25%-65% of sewage disposal.Sludge Reduction Technologies are one of the important channels for solving the problems, such as municipal sewage excess sludge.In order to
The minimizing of sludge is realized, generally needs to carry out a series of conditioning to sludge before sludge dewatering, by changing sludge solid phase
The morphological feature and characteristic of particle, reduce resistivity during sludge dewatering.Existing dehydrating agent is mainly polyacrylamide series
Flocculant, its processing cost is high, effect is still not ideal enough.After mechanism filter-pressing, moisture percentage in sewage sludge still has 80% or so.Therefore grind
The chemical conditioning sent out the agent of sludge dewatering decrement efficient and be used for before sludge press filtration, the heat as Treatment of Sludge industry research in recent years
Point.
In view of this, it is special to propose the present invention.
The content of the invention
The first object of the present invention is to provide a kind of compound type sludge decrement agent, and the compound type sludge decrement agent includes adjusting
Reason agent and exciting agent, the decrement agent use Fe2+Catalyzing and decomposing H2O2, generate the hydroxyl radical free radical (OH) of strong oxidizing property, hydroxyl
Free radical can make it degrade with the effect of most of organic matters, and the combination water in release activated sludge, sludge dewatering effect is good, decrement
Effect is substantially, environmentally friendly and good in economic efficiency.
The second object of the present invention is to provide a kind of preparation method of compound type sludge decrement agent, and the method is simply easy
OK, gained compound type sludge decrement agent has the advantages that sludge dewatering effect is good, reduced training is obvious, environmentally friendly and low cost.
The third object of the present invention is the application for providing a kind of compound type sludge decrement agent in sludge dewatering treatment, is made
Segmented treatment is carried out to sludge with compound type sludge decrement of the invention agent, mud decrement effect is obvious, after treatment
The moisture content of sludge can be less than 60%.
In order to realize above-mentioned purpose of the invention, spy uses following technical scheme：
In a first aspect, the invention provides a kind of compound type sludge decrement agent, the decrement agent includes conditioner and excites
Agent；
Wherein, conditioner includes at least one acid, Fe2+Ion and optionally metal ion, the acid are organic acid or nothing
Machine acid；
Exciting agent includes hydrogen peroxide.
Used as further preferably technical scheme, the metal ion is Al3+、K+Or Ca2+In any one or at least
Two kinds of mixing；
Preferably, conditioner includes hydrogen ion 0.2-0.4 weight portions, Fe2+Ion 14-23 weight portions and Al3+Ion 3-9
Weight portion.
As further preferably technical scheme, Fe2+Ion source is in ferrous sulfate and/or frerrous chloride；
Preferably, Al3+Ion source is any one in aluminium chloride, aluminium polychloride, polyaluminium sulfate or alum
Kind or at least two mixing, K+Ion source is in alum, Ca2+Ion source is in calcium chloride；
Preferably, organic acid is oxalic acid, tartaric acid or citric acid, and inorganic acid is hydrochloric acid or sulfuric acid.
Used as further preferably technical scheme, the concentration of hydrogen peroxide is 20-60%.
As further preferably technical scheme, the decrement agent also include flocculant, flocculant include polyacrylamide,
Optionally calcium oxide and optionally magnesia；
Preferably, flocculant includes polyacrylamide 40-60 weight portions, calcium oxide 20-30 weight portions and magnesia 10-30
Weight portion.
As further preferably technical scheme, count by weight：Conditioner includes sulfuric acid 10-20 that concentration is 98%
Part, ferrous sulfate 40-60 parts and aluminium polychloride 20-40 parts；
Exciting agent includes the hydrogen peroxide of concentration 20-60%；
Flocculant includes polyacrylamide 40-60 parts, calcium oxide 20-30 parts and magnesia 10-30 parts.
Second aspect, the invention provides a kind of preparation method of compound type sludge decrement agent, by acid, Fe2+Ion gun with
And optionally metal ion source mixing, obtain the conditioner.
As further preferably technical scheme, also including preparing flocculant the step of：By polyacrylamide, optionally oxygen
Change calcium and optionally magnesia mixing, dry, obtain the flocculant；
Preferably, drying temperature is 80-100 DEG C, and drying time is 20-40 minutes.
The third aspect, the invention provides a kind of application of compound type sludge decrement agent in sludge dewatering treatment, including
Following process step：
By sludge successively with conditioner, exciting agent and optionally flocculant fully reacts, then mud-water separation.
Used as further preferably technical scheme, during conditioner added into pending sludge, the addition of conditioner is
The 0.5-2% of sludge weight, stirring reaction 10-20 minutes, obtains nursing one's health sludge；
Preferably, to adding exciting agent in conditioning sludge, the addition of exciting agent is the 5-10% of sludge weight, aeration or
Stirring reaction 30-60 minutes, obtain brokenly sludge after glue and lysis；
Preferably, to flocculant is added in the sludge after broken glue and lysis, the addition of flocculant is sludge weight
0.1-0.3%, stirring reaction 10-20 minutes, obtains the sludge after coagulation；
Preferably, using any one in isolated by vacuum filtration method, centrifugal separation or filter press partition method by coagulation
Sludge afterwards carries out mud-water separation.
Compared with prior art, beneficial effects of the present invention are：
The compound type sludge decrement agent that the present invention is provided includes conditioner and exciting agent, and the decrement agent uses Fe2+Catalysis point
Solution H2O2, the hydroxyl radical free radical (OH) of strong oxidizing property is generated, hydroxyl radical free radical can make it degrade with the effect of most of organic matters,
Combination water in release activated sludge, sludge dewatering effect is good, and reduced training is substantially, environmentally friendly and good in economic efficiency.
The preparation method of the compound type sludge decrement agent that the present invention is provided is simple and easy to apply, gained compound type sludge decrement agent tool
Have the advantages that sludge dewatering effect is good, reduced training is obvious, environmentally friendly and low cost.
Compound type sludge decrement agent of the invention is applied in sludge dewatering treatment, specifically, using the compound dirt
The agent of mud decrement carries out segmented treatment to sludge, simple to operate easily controllable, and mud decrement effect is obvious, dirt after treatment
The moisture content of mud can be less than 60%.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will
Understand, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the present invention.It is unreceipted specific in embodiment
Condition person, the condition advised according to normal condition or manufacturer is carried out.
In a first aspect, the invention provides a kind of compound type sludge decrement agent, the decrement agent includes conditioner and excites
Agent；
Wherein, conditioner includes at least one acid, Fe2+Ion and optionally metal ion, the acid are organic acid or nothing
Machine acid；
Exciting agent includes hydrogen peroxide.
Wherein, metal ion is typical but non-limiting is：Al3+、K+、Ca2+、Mg2+Or Na+。
The agent of above-mentioned compound type sludge decrement includes conditioner and exciting agent, and conditioner is first by acid, Fe2+Ion and optionally
Ground metal ion is nursed one's health sludge in advance, makes sludge in acidity, and contain Fe2+Ion and optionally metal ion；Excite
Hydrogen peroxide in agent reacts with conditioned sludge, makes sludge dewatering decrement.Specifically, the decrement agent uses Fe2+Catalysis
Decomposing H2O2, the hydroxyl radical free radical (OH) of strong oxidizing property is generated, hydroxyl radical free radical can drop it with the effect of most of organic matters
Solution, the combination water in release activated sludge, sludge dewatering effect is good, and reduced training is substantially, environmentally friendly and good in economic efficiency.
In one kind is preferably carried out mode, the metal ion is Al3+、K+Or Ca2+In any one or at least two
The mixing planted.
Preferably, conditioner includes hydrogen ion 0.2-0.4 weight portions, Fe2+Ion 14-23 weight portions and Al3+Ion 3-9
Weight portion.In the present invention, count by weight, the typical but non-limiting content of hydrogen ion is：0.2 part, 0.21 part, 0.22
Part, 0.23 part, 0.24 part, 0.25 part, 0.26 part, 0.27 part, 0.28 part, 0.29 part, 0.3 part, 0.31 part, 0.32 part, 0.33
Part, 0.34 part, 0.35 part, 0.36 part, 0.37 part, 0.38 part, 0.39 part or 0.4 part；Fe2+Ion is typical but non-limiting to be contained
Measure and be：14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts or 23 parts；Al3+Ion is typical but non-limiting
Content be：3 parts, 3.2 parts, 3.4 parts, 3.6 parts, 3.8 parts, 4 parts, 4.2 parts, 4.4 parts, 4.6 parts, 4.8 parts, 5 parts, 5.2 parts,
5.4 parts, 5.6 parts, 5.8 parts, 6 parts, 6.2 parts, 6.4 parts, 6.6 parts, 6.8 parts, 7 parts, 7.2 parts, 7.4 parts, 7.6 parts, 7.8 parts, 8
Part, 8.2 parts, 8.4 parts, 8.6 parts, 8.8 parts or 9 parts.
Present embodiment is on the basis of reference Fenton's reaction is absorbed, to be suitably modified and optimize, Fenton's reaction
General principle is Fe under strongly acidic conditions2+Catalyzing and decomposing H2O2, generate the hydroxyl radical free radical (OH) of strong oxidizing property；This reality
Apply mode and do not set strict regulation to pH value, but according to sludge quality how much, accomplish the broken glue of appropriateness and dissolving cell, release is lived
Property sludge in combination water be main purpose, greatly reduce the consumption of medicament.
In one kind is preferably carried out mode, Fe2+Ion source is in ferrous sulfate and/or frerrous chloride；
Preferably Al3+Any one of ion source in aluminium chloride, aluminium polychloride, polyaluminium sulfate or alum
Or at least two mixing, K+Ion source is in alum, Ca2+Ion source is in calcium chloride；
Preferably, organic acid is oxalic acid, tartaric acid or citric acid, and inorganic acid is hydrochloric acid or sulfuric acid.From above-mentioned each chemistry
Raw material can give full play to the effect of the neutralization Sludge Surface negative electrical charge of inorganic flocculating agent, more conducively fragrant to reduce sludge specific resistance
The reagent that pauses plays oxidation, makes it easier for being dehydrated decrement.
In one kind is preferably carried out mode, the concentration of hydrogen peroxide is 20-60%.In the present invention, hydrogen peroxide is typical but non-
Restricted concentration be 20%, 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, 40%, 42%,
44%th, 46%, 48%, 50%, 52%, 54%, 56%, 58% or 60%.
In one kind is preferably carried out mode, the decrement agent also includes flocculant, and flocculant includes polyacrylamide, appoints
Selection of land calcium oxide and optionally magnesia；
Preferably, flocculant includes polyacrylamide 40-60 weight portions, calcium oxide 20-30 weight portions and magnesia 10-30
Weight portion.In the present invention, count by weight, the typical but non-limiting content of polyacrylamide is：40 parts, 41 parts, 42 parts,
43 parts, 44 parts, 45 parts, 46 parts, 47 parts, 48 parts, 49 parts, 50 parts, 51 parts, 52 parts, 53 parts, 54 parts, 55 parts, 56 parts, 57 parts, 58
Part, 59 parts or 60 parts；The typical but non-limiting content of calcium oxide is：20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26
Part, 27 parts, 28 parts, 29 parts or 30 parts；The typical but non-limiting content of magnesia is：10 parts, 11 parts, 12 parts, 13 parts, 14
Part, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts
Or 30 parts.
Conditioner, exciting agent and flocculant with the use of the reduced training that can significantly improve sewage, while, additionally it is possible to
The addition of polyacrylamide is substantially reduced, environmental pollution is reduced.Calcium oxide and magnesia are conducive to neutralizing pH after Fenton's reaction
Relatively low sour environment, terminates Fenton's reaction in time, and the outer polymer of guarantor for reducing and avoiding the formation of sludge flco dissolves, and subtracts
The consumption of few chemical reagent, but be conducive to sludge dewatering decrement.
In one kind is preferably carried out mode, count by weight：Conditioner includes sulfuric acid 10-20 that concentration is 98%
Part, ferrous sulfate 40-60 parts and aluminium polychloride 20-40 parts；
Exciting agent is mainly the hydrogen peroxide of concentration 20-60%；
Flocculant includes polyacrylamide 40-60 parts, calcium oxide 20-30 parts and magnesia 10-30 parts.
Above-mentioned decrement agent has given full play to the mating reaction of each raw material, and with advantages below：
(1) above-mentioned decrement agent is on the basis of reference Fenton's reaction is absorbed, to be suitably modified and optimize.Fenton is anti-
The general principle answered is Fe under strongly acidic conditions2+Catalyzing and decomposing H2O2, the hydroxyl radical free radical (OH) of strong oxidizing property is generated,
Hydroxyl radical free radical can make it degrade with the effect of most of organic matters.The present invention does not set strict regulation to pH value, but according to dirt
How much is shale amount, accomplishes the broken glue of appropriateness and dissolving cell, and the combination water in release activated sludge is main purpose, is greatly reduced
The consumption of medicament.
(2) compound use of ferrous sulfate and aluminium polychloride, can make full use of the neutralization sludge of inorganic metal flocculant
The effect of surface negative charge, to reduce sludge specific resistance, more conducively Fenton reagent plays oxidation, makes it easier for dehydration and subtract
Amount.
(3) calcium oxide and magnesia are conducive to neutralizing the relatively low sour environments of pH after Fenton's reaction, Fenton are terminated in time anti-
Should, the outer polymer of guarantor for reducing and avoiding the formation of sludge flco dissolves, and reduces the consumption of chemical reagent, but be conducive to sludge
Dehydration decrement.
(4) due to the effect of Fenton reagent, dewatering performance of sludge enhancing, the addition of polyacrylamide can also subtract significantly
It is few, but dewatering performance of sludge is very well, and reduction is obvious.
Second aspect, the invention provides a kind of preparation method of compound type sludge decrement agent, by acid, Fe2+Ion gun with
And optionally metal ion source mixing, obtain the conditioner.
The preparation method of above-mentioned compound type sludge decrement agent is simple and easy to apply, and there is sludge to take off for gained compound type sludge decrement agent
Water effect is good, reduced training obvious, the advantage of environmentally friendly and low cost.
In one kind is preferably carried out mode, also including preparing flocculant the step of：By polyacrylamide, optionally aoxidize
Calcium and optionally magnesia mixing, dry, and obtain the flocculant；
Preferably, drying temperature is 80-100 DEG C, and drying time is 20-40 minutes.
The third aspect, the invention provides a kind of application of compound type sludge decrement agent in sludge dewatering treatment, including
Following process step：
By sludge successively with conditioner, exciting agent and optionally flocculant fully reacts, then mud-water separation.
Compound type sludge decrement agent of the invention is applied in sludge dewatering treatment, specifically, using the compound dirt
The agent of mud decrement carries out segmented treatment to sludge, simple to operate easily controllable, and mud decrement effect is obvious, dirt after treatment
The moisture content of mud can be less than 60%.
In one kind is preferably carried out mode, during conditioner added into pending sludge, the addition of conditioner is dirt
The 0.5-2% of mud weight, stirring reaction 10-20 minutes, obtains nursing one's health sludge；
Preferably, to adding exciting agent in conditioning sludge, the addition of exciting agent is the 5-10% of sludge weight, aeration or
Stirring reaction 30-60 minutes, obtain brokenly sludge after glue and lysis；
Preferably, to flocculant is added in the sludge after broken glue and lysis, the addition of flocculant is sludge weight
0.1-0.3%, stirring reaction 10-20 minutes, obtains the sludge after coagulation；
Preferably, using any one in isolated by vacuum filtration method, centrifugal separation or filter press partition method by coagulation
Sludge afterwards carries out mud-water separation.
By controlling the weight of conditioner, exciting agent and flocculant and the ratio of sludge weight respectively, it is not only able to make this
Compound type sludge decrement agent is used adequately reasonably, and sludge dewatering effect and reduction can be made to reach most preferably.
With reference to embodiment and comparative example, the present invention will be further described in detail.
Embodiment 1
A kind of compound type sludge decrement agent, including conditioner and exciting agent；
Wherein, conditioner includes the concentrated sulfuric acid (mass concentration 98%) 10kg and ferrous sulfate 60kg；Exciting agent is for concentration
27.5% hydrogen peroxide.
Embodiment 2
A kind of mud decrement agent, conditioner includes the concentrated sulfuric acid (mass concentration 98%) 10kg and ferrous sulfate 1kg；Exciting agent
It is the hydrogen peroxide that concentration is 15%.
Embodiment 3
A kind of compound type sludge decrement agent, including conditioner, exciting agent and flocculant；
Wherein, conditioner includes the concentrated sulfuric acid (mass concentration 98%) 10kg and ferrous sulfate 60kg；Exciting agent is for concentration
27.5% hydrogen peroxide；Flocculant is polyacrylamide.
Embodiment 4
A kind of compound type sludge decrement agent, including conditioner, exciting agent and flocculant；
Wherein, conditioner includes the concentrated sulfuric acid (mass concentration 98%) 10kg, ferrous sulfate 60kg, aluminium polychloride 30kg；
Exciting agent is hydrogen peroxide that concentration is 27.5%；Flocculant includes polyacrylamide 60kg, calcium oxide 30kg and magnesia 10kg.
Embodiment 5
A kind of compound type sludge decrement agent, including conditioner, exciting agent and flocculant；
Wherein, conditioner includes the concentrated sulfuric acid (mass concentration 98%) 5kg, ferrous sulfate 30kg, aluminium polychloride 10kg；Swash
Hair agent is hydrogen peroxide that concentration is 17.5%；Flocculant includes polyacrylamide 20kg, calcium oxide 40kg and magnesia 40kg.
As different from Example 3, the weight proportion of the decrement agent in embodiment 5 is not in preferred scope of the invention.
Embodiment 6
A kind of compound type sludge decrement agent, including conditioner, exciting agent and flocculant；
Wherein, conditioner includes the concentrated sulfuric acid (mass concentration 98%) 20kg, ferrous sulfate 40kg, aluminium polychloride 40kg；
Exciting agent is hydrogen peroxide that concentration is 35%；Flocculant includes polyacrylamide 40kg, calcium oxide 30kg and magnesia 30kg.
Embodiment 7
A kind of compound type sludge decrement agent, including conditioner, exciting agent and flocculant；
Wherein, conditioner includes the concentrated sulfuric acid (mass concentration 98%) 15kg, ferrous sulfate 50kg, aluminium polychloride 35kg；
Exciting agent is hydrogen peroxide that concentration is 50%；Flocculant includes polyacrylamide 50kg, calcium oxide 25kg and magnesia 25kg.
Embodiment 8
The concentrated sulfuric acid (mass concentration 98%) 10kg, ferrous sulfate 60kg are taken, is stirred after mixing and is obtained final product conditioner 70kg；
The concentration for exciting agent hydrogen peroxide used is 27.5%；Flocculant used is polyacrylamide.
Embodiment 9
The concentrated sulfuric acid (mass concentration 98%) 10kg, ferrous sulfate 60kg, aluminium polychloride 30kg are taken, is stirred after mixing
Obtain final product conditioner 100kg；The concentration for exciting agent hydrogen peroxide used is 27.5%；Take polyacrylamide 60kg, calcium oxide 30kg, oxygen
Change magnesium 10kg, after all components mixing, at a temperature of 80 DEG C, dry 40 minutes, flocculant is prepared from.
Embodiment 10
The concentrated sulfuric acid (mass concentration 98%) 20kg, ferrous sulfate 40kg, aluminium polychloride 40kg are taken, is stirred after mixing
Obtain final product conditioner 100kg；The concentration for exciting agent hydrogen peroxide used is 35%；Polyacrylamide 40kg, calcium oxide 30kg are taken, is aoxidized
Magnesium 30kg, after all components mixing, at a temperature of 100 DEG C, dries 20 minutes, and flocculant is prepared from.
Embodiment 11
The concentrated sulfuric acid (mass concentration 98%) 15kg, ferrous sulfate 50kg, aluminium polychloride 35kg are taken, is stirred after mixing
Obtain final product conditioner 100kg.The concentration for exciting agent hydrogen peroxide used is 50%；Polyacrylamide 50kg, calcium oxide 25kg are taken, is aoxidized
Magnesium 25kg, after all components mixing, at a temperature of 90 DEG C, dries 30 minutes, and flocculant is prepared from.
Embodiment 12
Take certain textile mills it is concentrated after excess sludge carry out minimizing, the sludge solid content 1.6%.To in the sludge
The conditioner in embodiment 1 is added, consumption is the 1.0% of sludge quality, mechanical agitation 20 minutes obtains nursing one's health sludge；To tune
The hydrogen peroxide that exciting agent, i.e. mass concentration are 27.5% is added in reason sludge, consumption is the 8% of sludge quality, and aeration agitation is anti-
Answer 60 minutes, obtain brokenly sludge after glue and lysis；Again to the flocculant added in the sludge after lysis in embodiment 1, consumption
It is the 0.2% of sludge quality, mechanic whirl-nett reaction obtains the sludge after coagulation after 20 minutes；Finally using plate and frame filter press to mixed
Sludge after solidifying carries out sludge dewatering, the moisture percentage in sewage sludge after dehydration be 56.3% (only using after polyacrylamide press filtration it is right
According to group, moisture content is 78.8%), that is, to realize mud decrement 96.34%, and sludge quantity 51.5% is reduced than control group more.
In addition, using the mud decrement agent in embodiment 2 as another control group, moisture content is 69.1%, dehydrating effect
With the compound type sludge decrement agent that mud decrement effect is inferior to embodiment 1, illustrate embodiment 1 by the concentrated sulfuric acid and ferrous sulfate
The optimization of proportioning and the optimization to hydrogen peroxide concentration so that sewage reduced training is more preferable；
Using the compound type sludge decrement agent in embodiment 5 as the 3rd control group, moisture content is 58.2%, dehydrating effect
With the compound type sludge decrement agent that mud decrement effect is inferior to embodiment 1, but better than polyacrylamide and embodiment 2, illustrate
The effect of its mud decrement can be further enhanced in the compound type sludge decrement agent after this component of increase flocculant.
Embodiment 13
Take certain heavy civil sewage treatment plant it is concentrated after excess sludge carry out minimizing, the sludge solid content
2.8%.To the conditioner added in the sludge in embodiment 4, consumption is the 2.0% of sludge quality, and mechanical agitation 20 minutes is obtained
To conditioning sludge；To the hydrogen peroxide that exciting agent, i.e. mass concentration are 27.5% is added in conditioning sludge, consumption is sludge quality
10%, aeration agitation is reacted 60 minutes, obtains brokenly sludge after glue and lysis；Again to addition embodiment 4 in the sludge after lysis
In flocculant, consumption for sludge quality 0.3%, mechanic whirl-nett reaction obtains the sludge after coagulation after 20 minutes；Finally make
Sludge dewatering is carried out to the sludge after coagulation with plate and frame filter press, the moisture percentage in sewage sludge after dehydration is 58.5% (only using poly- third
The control group of press filtration after acrylamide, moisture content is 81.5%), that is, to realize mud decrement 93%, and sludge quantity is reduced than control group more
55%.
In addition, using the mud decrement agent in embodiment 2 as another control group, moisture content is 74.8%, dehydrating effect
With the compound type sludge decrement agent that mud decrement effect is inferior to embodiment 4；
Using the compound type sludge decrement agent in embodiment 5 as the 3rd control group, moisture content is 59.5%, dehydrating effect
With the compound type sludge decrement agent that mud decrement effect is inferior to embodiment 4, but better than polyacrylamide and embodiment 2.
Embodiment 14
The excess sludge of Qu Mou industrial parks secondary sedimentation tank of sewage treatment work carries out minimizing, the sludge solid content 1%.To this
The conditioner in embodiment 6 is added in sludge, consumption is the 0.5% of sludge quality, and mechanical agitation 10 minutes obtains conditioning dirty
Mud；To the hydrogen peroxide that exciting agent, i.e. mass concentration are 35% is added in conditioning sludge, consumption is the 5% of sludge quality, and machinery is stirred
Reaction 30 minutes is mixed, sludge after glue and lysis is obtained brokenly；Again to the flocculant added in the sludge after lysis in embodiment 6,
Consumption is the 0.1% of sludge quality, and mechanic whirl-nett reaction obtains the sludge after coagulation after 10 minutes；Finally use plate and frame filter press
Sludge dewatering is carried out to the sludge after coagulation, the moisture percentage in sewage sludge after dehydration (only uses press filtration after polyacrylamide for 59.2%
Control group, moisture content is 80.5%), that is, to realize mud decrement 97.6%, than control group more reduce sludge quantity 53%.
In addition, using the mud decrement agent in embodiment 2 as another control group, moisture content is 73.6%, dehydrating effect
With the compound type sludge decrement agent that mud decrement effect is inferior to embodiment 6；
Using the compound type sludge decrement agent in embodiment 5 as the 3rd control group, moisture content is 59.8%, dehydrating effect
With the compound type sludge decrement agent that mud decrement effect is inferior to embodiment 6, but better than polyacrylamide and embodiment 2.
Embodiment 15
Take certain printing and dyeing mill it is concentrated after excess sludge carry out minimizing, the sludge solid content 2.1%.To in the sludge
The conditioner in embodiment 7 is added, consumption is the 1.0% of sludge quality, mechanical agitation 20 minutes obtains nursing one's health sludge；To tune
The hydrogen peroxide that exciting agent, i.e. mass concentration are 55% is added in reason sludge, consumption is the 5% of sludge quality, aeration agitation reaction
45 minutes, obtain brokenly sludge after glue and lysis；Again to the flocculant added in the sludge after lysis in embodiment 7, consumption is
The 0.2% of sludge quality, mechanic whirl-nett reaction obtains the sludge after coagulation after 15 minutes；Finally using belt filter press to coagulation
Sludge afterwards carries out sludge dewatering, and the moisture percentage in sewage sludge after dehydration (only uses the control of press filtration after polyacrylamide for 57.5%
Group, moisture content is 79.6%), that is, to realize mud decrement 95%, and sludge quantity 49.6% is reduced than control group more.
In addition, using the mud decrement agent in embodiment 2 as another control group, moisture content is 78.5%, dehydrating effect
With the compound type sludge decrement agent that mud decrement effect is inferior to embodiment 7；
Using the compound type sludge decrement agent in embodiment 5 as the 3rd control group, moisture content is 58.7%, dehydrating effect
With the compound type sludge decrement agent that mud decrement effect is inferior to embodiment 7, but better than polyacrylamide and embodiment 2.
Although illustrate and describing the present invention with specific embodiment, but will be appreciated that without departing substantially from of the invention
Many other changes and modification can be made in the case of spirit and scope.It is, therefore, intended that in the following claims
Including belonging to all such changes and modifications in the scope of the invention.
Claims (10)
1. a kind of compound type sludge decrement agent, it is characterised in that the decrement agent includes conditioner and exciting agent；
Wherein, conditioner includes at least one acid, Fe2+Ion and optionally metal ion, the acid are organic acid or inorganic acid；
Exciting agent includes hydrogen peroxide.
2. compound type sludge decrement agent according to claim 1, it is characterised in that the metal ion is Al3+、K+Or Ca2 +In any one or at least two mixing；
Preferably, conditioner includes hydrogen ion 0.2-0.4 weight portions, Fe2+Ion 14-23 weight portions and Al3+Ion 3-9 weight
Part.
3. compound type sludge decrement agent according to claim 1 and 2, it is characterised in that Fe2+Ion source is in ferrous sulfate
And/or frerrous chloride；
Preferably, Al3+Ion source in aluminium chloride, aluminium polychloride, polyaluminium sulfate or alum any one or
At least two mixing, K+Ion source is in alum, Ca2+Ion source is in calcium chloride；
Preferably, organic acid is oxalic acid, tartaric acid or citric acid, and inorganic acid is hydrochloric acid or sulfuric acid.
4. compound type sludge decrement agent according to claim 1 and 2, it is characterised in that the concentration of hydrogen peroxide is 20-
60%.
5. compound type sludge decrement agent according to claim 1 and 2, it is characterised in that the decrement agent also includes flocculation
Agent, flocculant includes polyacrylamide, optionally calcium oxide and optionally magnesia；
Preferably, flocculant includes polyacrylamide 40-60 weight portions, calcium oxide 20-30 weight portions and magnesia 10-30 weight
Part.
6. compound type sludge decrement agent according to claim 1, it is characterised in that count by weight：Conditioner includes
Concentration is sulfuric acid 10-20 parts, ferrous sulfate 40-60 parts and aluminium polychloride 20-40 parts of 98%；
Exciting agent includes the hydrogen peroxide of concentration 20-60%；
Flocculant includes polyacrylamide 40-60 parts, calcium oxide 20-30 parts and magnesia 10-30 parts.
7. the preparation method of the compound type sludge decrement agent described in any one of claim 1-6, it is characterised in that by acid, Fe2+From
Component and optionally metal ion source mixing, obtain the conditioner.
8. preparation method according to claim 7, it is characterised in that also including preparing flocculant the step of：By polypropylene
Acid amides, optionally calcium oxide and optionally magnesia mixing, dry, and obtain the flocculant；
Preferably, drying temperature is 80-100 DEG C, and drying time is 20-40 minutes.
9. application of the compound type sludge decrement agent described in any one of claim 1-6 in sludge dewatering treatment, its feature exists
In, including following process step：
By sludge successively with conditioner, exciting agent and optionally flocculant fully reacts, then mud-water separation.
10. application according to claim 9, it is characterised in that during conditioner added into pending sludge, conditioner
Addition is the 0.5-2% of sludge weight, stirring reaction 10-20 minutes, obtains nursing one's health sludge；
Preferably, to exciting agent is added in conditioning sludge, the addition of exciting agent is the 5-10% of sludge weight, aeration or stirring
Reaction 30-60 minutes, obtains brokenly sludge after glue and lysis；
Preferably, to flocculant is added in the sludge after broken glue and lysis, the addition of flocculant is the 0.1- of sludge weight
0.3%, stirring reaction 10-20 minutes, obtain the sludge after coagulation；
Preferably, using any one in isolated by vacuum filtration method, centrifugal separation or filter press partition method by after coagulation
Sludge carries out mud-water separation.
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| CN108178491A (en) * | 2017-12-20 | 2018-06-19 | 华侨大学 | A kind of method for improving sewage treatment plant residual active sludge dewatering |
| CN108218186A (en) * | 2018-01-05 | 2018-06-29 | 中冶华天工程技术有限公司 | The method that sludge conditioner is prepared using domestic waste incineration residue |
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| CN110590118A (en) * | 2019-09-02 | 2019-12-20 | 深圳市深创环境工程技术有限公司 | Deep dehydration method for chemical conditioning of sludge garbage and dehydration system |
| CN112661375A (en) * | 2020-12-23 | 2021-04-16 | 福州大学 | Method for deodorizing sludge through catalytic oxidation of hydroxyl radicals, deodorized sludge and application |
| CN116143378A (en) * | 2022-09-08 | 2023-05-23 | 湖南大学 | Sludge dewatering conditioner and method for strengthening dewatering performance |
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