CN108609823A - Method for enhancing sludge dewatering performance - Google Patents
Method for enhancing sludge dewatering performance Download PDFInfo
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- CN108609823A CN108609823A CN201810296132.1A CN201810296132A CN108609823A CN 108609823 A CN108609823 A CN 108609823A CN 201810296132 A CN201810296132 A CN 201810296132A CN 108609823 A CN108609823 A CN 108609823A
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- wet mud
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- 239000010802 sludge Substances 0.000 title claims abstract description 146
- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000002708 enhancing effect Effects 0.000 title 1
- 235000010335 lysozyme Nutrition 0.000 claims abstract description 87
- 102000016943 Muramidase Human genes 0.000 claims abstract description 82
- 108010014251 Muramidase Proteins 0.000 claims abstract description 82
- 108010062010 N-Acetylmuramoyl-L-alanine Amidase Proteins 0.000 claims abstract description 82
- 229960000274 lysozyme Drugs 0.000 claims abstract description 82
- 239000004325 lysozyme Substances 0.000 claims abstract description 82
- 108091005804 Peptidases Proteins 0.000 claims abstract description 68
- 239000004365 Protease Substances 0.000 claims abstract description 68
- 102100037486 Reverse transcriptase/ribonuclease H Human genes 0.000 claims abstract description 68
- 238000006243 chemical reaction Methods 0.000 claims abstract description 38
- 102000004190 Enzymes Human genes 0.000 claims abstract description 37
- 108090000790 Enzymes Proteins 0.000 claims abstract description 37
- 229940088598 enzyme Drugs 0.000 claims abstract description 37
- 239000012065 filter cake Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 239000008367 deionised water Substances 0.000 claims description 25
- 229910021641 deionized water Inorganic materials 0.000 claims description 25
- 230000018044 dehydration Effects 0.000 claims description 23
- 238000006297 dehydration reaction Methods 0.000 claims description 23
- 230000002787 reinforcement Effects 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 21
- 230000010355 oscillation Effects 0.000 claims description 20
- 239000002253 acid Substances 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 7
- 239000002562 thickening agent Substances 0.000 claims description 7
- 238000006911 enzymatic reaction Methods 0.000 claims description 2
- 238000002242 deionisation method Methods 0.000 claims 1
- 238000005728 strengthening Methods 0.000 abstract 2
- 238000010979 pH adjustment Methods 0.000 abstract 1
- 208000005156 Dehydration Diseases 0.000 description 18
- 238000001914 filtration Methods 0.000 description 11
- 238000001035 drying Methods 0.000 description 6
- 108010059892 Cellulase Proteins 0.000 description 5
- 102000003886 Glycoproteins Human genes 0.000 description 5
- 108090000288 Glycoproteins Proteins 0.000 description 5
- MKYBYDHXWVHEJW-UHFFFAOYSA-N N-[1-oxo-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propan-2-yl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(C(C)NC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 MKYBYDHXWVHEJW-UHFFFAOYSA-N 0.000 description 5
- 229940106157 cellulase Drugs 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 230000035484 reaction time Effects 0.000 description 5
- 210000004027 cell Anatomy 0.000 description 4
- 150000001720 carbohydrates Chemical class 0.000 description 3
- 210000002421 cell wall Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003301 hydrolyzing effect Effects 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 102000004169 proteins and genes Human genes 0.000 description 3
- 108090000623 proteins and genes Proteins 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 150000004676 glycans Chemical class 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 230000003834 intracellular effect Effects 0.000 description 2
- 229920001282 polysaccharide Polymers 0.000 description 2
- 239000005017 polysaccharide Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- QCVGEOXPDFCNHA-UHFFFAOYSA-N 5,5-dimethyl-2,4-dioxo-1,3-oxazolidine-3-carboxamide Chemical compound CC1(C)OC(=O)N(C(N)=O)C1=O QCVGEOXPDFCNHA-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000014103 egg white Nutrition 0.000 description 1
- 210000000969 egg white Anatomy 0.000 description 1
- 235000013601 eggs Nutrition 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229920000592 inorganic polymer Polymers 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000010148 water-pollination Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- C02F11/02—Biological treatment
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to the technical field of sludge treatment, in particular to a method for strengthening sludge dewatering performance. The method comprises the following specific steps: adjusting the pH value of the wet sludge to 6.0-7.0; adding lysozyme into the wet sludge after pH adjustment for reaction, and then adding protease for reaction; and dehydrating the wet sludge pretreated by the enzyme to obtain a sludge filter cake. The method for strengthening the sludge dewatering performance disclosed by the invention not only can improve the overall dewatering performance of the sludge, but also can reduce the influence on the environment and the ecology by the dewatered sludge obtained after the dewatering treatment by the method.
Description
Technical field
The present invention relates to technical field of sludge treatment more particularly to a kind of methods of reinforcement sludge dewatering.
Background technology
With the fast development of China's economy and the continuous improvement of sewage treating efficiency, the by-product-that sewage disposal generates
Sludge quantity also sharply increases.Final product of the sludge as sewage disposal, since its water content may be up to 95%-99%,
It is difficult to meet the requirement of the subsequent processings such as compost, landfill, pyrolysis, burning, and because of its water content height, volume is big, also increases
The transportation cost and difficulty of sludge.In addition, containing in sludge, there are many harmful substances, such as heavy metal, pathogenic microorganism, organic poison
Deng if cannot get appropriate processing and disposition, also huge harm will be caused to environment and ecology.Therefore, sludge dewatering conduct
Most important pretreatment process is the vital link for reducing sludge subsequent processing and cost of disposal.And in order to solve dirt
The problem of mud is dehydrated, people are first it is envisioned that be carried out dehydrating sludge by Mechanical Method, however, organic due to sludge
Matter content is high, and hydrophily is strong, and cell interior combination water large percentage, is difficult to take off by conventional mechanical dehydration method therefore
Except the combination water of cell interior, sludge dewatering efficiency is low.
In order to improve the dewatering of sludge, currently, people are mainly by adding chemical amendment into sludge
(such as inorganic polymer flocculant, organic polymer coargulator) improves sludge dewatering efficiency.However, in these modes,
Since these compounds can remain in dewatered sludge, and it is difficult to by the microbial degradation and utilization in environment, it therefore, will
Uncertain environment and ecological risk are brought to the later use of dewatered sludge.
Invention content
In view of the above-mentioned problems in the prior art, the purpose of the present invention is to provide a kind of reinforcement sludge dewaterings
Method, the dewatering of sludge can not only be improved, but also can reduce sludge to environment and ecology influence.
To achieve the above object, the present invention provides the following technical solutions：
The present invention provides a kind of method of reinforcement sludge dewatering, includes the following steps：
Adjust pH value：Wet mud is weighed, adjusts the pH value of the wet mud to 6.0~7.0；
Enzyme pretreatment：Bacteriolyze enzyme reaction is first added into the wet mud after pH adjusted, it is anti-that protease is then added
It answers；
Dehydration：The wet mud after the enzyme pretreatment is carried out dehydrating, sludge filter cake is obtained.
Wherein, it is domestic sludge more than or equal to 99.5%, the lysozyme, institute that the wet mud, which can be moisture content,
Stating protease can be by commercially available acquisition.
Further, in the enzyme pretreatment the step of, the dispensing mass ratio of the lysozyme and the protease is
0.8:1~4:1.
Wherein, the dispensing mass ratio of the lysozyme and the protease is 0.8:1~4:1 includes the dispensing mass ratio
Any point value in range, such as the dispensing mass ratio of the lysozyme and the protease is 0.8:1、1:1、1.3:1、1.5:
1、1.6:1、2:1、2.3:1、2.6:1、3:1、3.3:1、3.6:1 or 4:1.
Preferably, the dispensing mass ratio of the lysozyme and the protease is 1.5:1~2:1.
It is highly preferred that the dispensing mass ratio of the lysozyme and the protease is 2:1.
Further, in the enzyme pretreatment the step of, the dispensing quality summation of the lysozyme and the protease
Mass ratio with dewatered sludge is 0.08:1~0.15:1.
Wherein, the dewatered sludge is the wet mud by filtering and after 103~105 DEG C of drying in oven to constant weight
Obtained sludge.
Wherein, the lysozyme and the dispensing quality summation of the protease and the mass ratio of dewatered sludge are 0.08:1~
0.15:1 includes any point value in the ratio range, for example, the dispensing quality summation of the lysozyme and the protease with
The mass ratio of dewatered sludge is 0.08:1、0.09:1、0.1:1、0.11:1、0.12:1、0.13:1、0.14:1 or 0.15:1.
Preferably, the lysozyme and the dispensing quality summation of the protease and the mass ratio of dewatered sludge are 0.08:1
~0.1:1.
Further, in the enzyme pretreatment the step of, lysozyme is added into the wet mud after pH adjusted
Afterwards, it stirs evenly, 1~3h of oscillating reactions in the case where temperature is 25~35 DEG C, frequency of oscillation is 140~180rpm；To through lysozyme
After protease is added in the pretreated wet mud, stir evenly, temperature be 40~50 DEG C, frequency of oscillation be 140~
1~3h of oscillating reactions under 180rpm.
Wherein, the reaction temperature being added into the wet mud after pH adjusted after lysozyme is 25~35 DEG C and includes
Any point value in the temperature range, such as the reaction temperature being added into the wet mud after pH adjusted after lysozyme is
25 DEG C, 30 DEG C or 35 DEG C；Be added into the wet mud after pH adjusted after lysozyme be 25~35 DEG C in temperature at carry out
The frequency of oscillation of oscillating reactions is any point value that 140~180rpm includes in the surge frequency range, such as to through pH tune
The frequency of oscillation of progress oscillating reactions is at being 25~35 DEG C in temperature after addition lysozyme in the wet mud after section
140rpm, 145rpm, 150rpm, 155rpm, 160rpm, 165rpm, 170rpm, 175rpm or 180rpm；To after pH adjusted
The wet mud in be added the reaction time after lysozyme be 1~3h include any point value in the time range, such as
The reaction time being added into the wet mud after pH adjusted after lysozyme is 1h, 1.5h, 2h, 2.5h or 3h.
Wherein, it is 40~50 DEG C to the reaction temperature after protease is added in the pretreated wet mud of lysozyme
Including any point value in the temperature range, such as to through the anti-of protease is added in the pretreated wet mud of lysozyme
It is 40 DEG C, 45 DEG C or 50 DEG C to answer temperature；It is in temperature to after protease is added in the pretreated wet mud of lysozyme
It includes any point in the surge frequency range that the frequency of oscillation that oscillating reactions is carried out at 40~50 DEG C, which is 140~180rpm,
Value, such as vibrated at being 25~35 DEG C in temperature after lysozyme is added in the pretreated wet mud of lysozyme
The frequency of oscillation of reaction be 140rpm, 145rpm, 150rpm, 155rpm, 160rpm, 165rpm, 170rpm, 175rpm or
180rpm；To through in the pretreated wet mud of lysozyme be added protease after reaction time be 1~3h include this
Any point value in time range, such as to anti-after the protease is added in the pretreated wet mud of lysozyme
It is 1h, 1.5h, 2h, 2.5h or 3h between seasonable.
Preferably, the reaction temperature being added into the wet mud after pH adjusted after lysozyme is 25 DEG C, oscillation frequency
Rate is 155rpm, reaction time 2h；To the reaction temperature after protease is added in the pretreated wet mud of lysozyme
Degree is 45 DEG C, frequency of oscillation 155rpm, reaction time 2h.
Further, in the enzyme pretreatment the step of, described in being added into the wet mud after pH adjusted
Before lysozyme, the lysozyme is first dissolved in deionized water；To through the pretreated wet mud of the lysozyme
Middle to be added before the protease, the protease is first dissolved in deionized water.
Wherein, it is dissolved in deionized water in the lysozyme, the mass ratio of the lysozyme and deionized water is
0.007:1~0.002:1；It is dissolved in deionized water in the protease, the mass ratio of the protease and deionized water is
0.002:1~0.0006:1.
Wherein, the lysozyme and the mass ratio of deionized water are 0.007:1~0.002:1 includes that the quality compares range
Interior any point value, such as the lysozyme and the mass ratio of deionized water are 0.007:1、0.006:1、0.005:1、0.004:
1、0.003:1 or 0.002:1.The protease and the mass ratio of deionized water are 0.002:1~0.0006:1 includes the matter
Amount is than any point value in range, such as the protease and the mass ratio of deionized water are 0.002:1、0.001:1、
0.0009:1、0.0008:1、0.0007:1 or 0.0006:1.
Preferably, it is dissolved in deionized water in the lysozyme, the mass ratio of the lysozyme and deionized water is
0.007:1；It is dissolved in deionized water in the protease, the mass ratio of the protease and deionized water is 0.002:1.
In the present invention, adjust the pH value of the wet mud the specific steps are：
First, the pH value of the wet mud is measured using pH meter；
Secondly, weak acid or weak base are added into the wet mud according to measurement result, after stirring evenly, measure the wet dirt
The pH value of mud until when the pH value of the wet mud is 6.0~7.0 stops that the weak acid or the weak base is added.
Wherein, it includes any point value in the pH value, such as the wet dirt that the pH value of the wet mud, which is 6.0~7.0,
The pH value of mud is 6.0,6.2,6.5,6.8 or 7.0.
Preferably, the pH value of the wet mud is 6.5.
Further, in the pH value for adjusting the wet mud, the used weak acid or the weak base it is a concentration of
The dosage of 0.01~0.5mol/L, the weak acid or the weak base is 0.1~0.5mL.
Wherein, a concentration of 0.01~0.5mol/L of the weak acid or the weak base includes any in the concentration range
Point value, for example, a concentration of 0.01mol/L, 0.05mol/L of the weak acid or the weak base, 0.1mol/L, 0.2mol/L,
0.3mol/L, 0.4mol/L or 0.5mol/L.The dosage of the weak acid or the weak base is that 0.1~0.5mL includes the numerical value
Any point value in range, for example, the dosage of the weak acid or the weak base be 0.1mL, 0.2mL, 0.3mL, 0.4mL or
0.5mL。
In the present invention, in the enzyme pretreatment the step of, after the mmp reaction is added, the wet mud is measured
Sludge specific resistance be 23 × 1010~234 × 1010m/kg。
Wherein, the sludge specific resistance for measuring the wet mud is 23 × 1010~234 × 1010M/kg includes the sludge specific resistance
Any point value in range, such as it is 23 × 10 to measure the sludge specific resistance through the wet mud10m/kg、45×1010m/kg、90
×1010m/kg、143×1010m/kg、232×1010M/kg or 234 × 1010m/kg。
In the present invention, in the dehydration, the dehydration be using whizzer, belt pressure filter,
A kind of carry out sludge dewatering treatment in plate and frame type filter-press, tubular filter press, vacuum filter, sludge thickener.
Further, in the dehydration, after dehydration is completed, the moisture content for measuring the sludge filter cake is 65%
~78%.The wherein described moisture content is any point value that 65%~78% includes in the numberical range, such as the moisture content
It is 67%, 68%, 70%, 73%, 75%, 76% or 78%.
A kind of method of reinforcement sludge dewatering provided by the invention, first, into the wet mud after pH adjusted plus
Enter lysozyme, using the carbohydrate in the cell wall and hydrolyzing sludge extracellular polymeric of cell in lysozyme hydrolysis sludge, thus
While being released effectively intracellular combination water and cellular content, the moisture wrapped up by carbohydrate is also discharged, and then effectively increase
The dewatering of strong sludge.Secondly, then protease is added in through the pretreated wet mud of lysozyme, utilizes protease hydrolytic
Class glycoprotein in sludge, to make the water release wrapped up by class glycoprotein come out, and then the entirety for effectively improving sludge is de-
Aqueous energy.
Further, since lysozyme and protease can natural degradation, therefore, using the present invention method sludge is taken off
Influence of the dewatered sludge obtained after water process to environment and ecology is small, has important application value.
Specific implementation mode
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
The every other embodiment that art personnel are obtained without making creative work belongs to the model that the present invention protects
It encloses.
It should be noted that the term " comprising " and " having " of the embodiment of the present invention and their any deformation, it is intended that
Be to cover it is non-exclusive include, for example, containing the process of series of steps or unit, method, system, product or equipment not
Those of be necessarily limited to clearly to list step or unit, but may include not listing clearly or for these processes, side
The intrinsic other steps of method, product or equipment or unit.
It needs to learn, the wet mud used in all embodiments below is that the life that moisture content is 99.7% is dirty
Mud.
Embodiment one
The present embodiment provides a kind of methods of reinforcement sludge dewatering, specifically include following steps：
Adjust pH value：Wet mud is weighed, adjusts the pH value of the wet mud to 6.5；Wherein, the tool of the pH value of wet mud is adjusted
Body step is first, the pH value of the wet mud to be measured using pH meter；Secondly, it is added into the wet mud according to measurement result
The weak base of a concentration of 0.1mol/L of 0.1mL after stirring evenly, measures the pH value of the wet mud, until the pH value of the wet mud is 6.5
When, stop that weak base is added；
Enzyme pretreatment：4g lysozymes are first added into the wet mud after pH adjusted, after stirring evenly temperature be 25 DEG C,
Frequency of oscillation is oscillating reactions 2h under 155rpm, and 1g protease is then added, and is 45 DEG C, oscillation frequency in temperature after stirring evenly
Rate is oscillating reactions 2h under 155rpm, after reaction is completed, the sludge specific resistance that measures wet mud after enzyme pretreatment is 45 ×
1010m/kg；Wherein, the mass ratio of the dispensing quality summation and dewatered sludge of lysozyme and protease is 0.08:1；In addition, to
It is added before lysozyme in wet mud after pH adjusted, lysozyme can be first dissolved in deionized water；To pre- through lysozyme
It is added before protease in wet mud that treated, protease can be first dissolved in deionized water.In addition, in the present embodiment,
The dewatered sludge be the wet mud by filtering and after 103~105 DEG C of drying in oven to the sludge that constant weight obtains, and this is dry
The quality of sludge is 60g.
Dehydration：Wet mud after enzyme pretreatment is carried out dehydrating, sludge filter cake is obtained, measures the sludge filtering
The moisture content of cake is 72.81%.Wherein, dehydration can utilize whizzer, belt pressure filter, plate and frame type filter-press, pipe
A kind of carry out sludge dewatering treatment in formula filter press, vacuum filter, sludge thickener.
Embodiment two
The present embodiment provides a kind of methods of reinforcement sludge dewatering, specifically include following steps：
Adjust pH value：Wet mud is weighed, adjusts the pH value of the wet mud to 6.5；Wherein, the tool of the pH value of wet mud is adjusted
Body step is first, the pH value of the wet mud to be measured using pH meter；Secondly, it is added into the wet mud according to measurement result
The weak base of a concentration of 0.1mol/L of 0.1mL after stirring evenly, measures the pH value of the wet mud, until the pH value of the wet mud is 6.5
When, stop that weak base is added；
Enzyme pretreatment：4g lysozymes are first added into the wet mud after pH adjusted, after stirring evenly temperature be 25 DEG C,
Frequency of oscillation is oscillating reactions 2h under 155rpm, and 2g protease is then added, and is 45 DEG C, oscillation frequency in temperature after stirring evenly
Rate is oscillating reactions 2h under 155rpm, after reaction is completed, the sludge specific resistance that measures wet mud after enzyme pretreatment is 23 ×
1010m/kg；Wherein, the mass ratio of the dispensing quality summation and dewatered sludge of lysozyme and protease is 0.1:1；In addition, to
It is added before lysozyme in wet mud after pH adjusted, lysozyme can be first dissolved in deionized water；To pre- through lysozyme
It is added before protease in wet mud that treated, protease can be first dissolved in deionized water.In addition, in the present embodiment,
The dewatered sludge be the wet mud by filtering and after 103~105 DEG C of drying in oven to the sludge that constant weight obtains, and this is dry
The quality of sludge is 60g.
Dehydration：Wet mud after enzyme pretreatment is carried out dehydrating, sludge filter cake is obtained, measures the sludge filtering
The moisture content of cake is 67.17%.Wherein, dehydration can utilize whizzer, belt pressure filter, plate and frame type filter-press, pipe
A kind of carry out sludge dewatering treatment in formula filter press, vacuum filter, sludge thickener.
Embodiment three
The present embodiment provides a kind of methods of reinforcement sludge dewatering, specifically include following steps：
Adjust pH value：Wet mud is weighed, adjusts the pH value of the wet mud to 6.5；Wherein, the tool of the pH value of wet mud is adjusted
Body step is first, the pH value of the wet mud to be measured using pH meter；Secondly, it is added into the wet mud according to measurement result
The weak base of a concentration of 0.1mol/L of 0.1mL after stirring evenly, measures the pH value of the wet mud, until the pH value of the wet mud is 6.5
When, stop that weak base is added；
Enzyme pretreatment：4g lysozymes are first added into the wet mud after pH adjusted, after stirring evenly temperature be 25 DEG C,
Frequency of oscillation is oscillating reactions 2h under 155rpm, and 3g protease is then added, and is 45 DEG C, oscillation frequency in temperature after stirring evenly
Rate is oscillating reactions 2h under 155rpm, after reaction is completed, the sludge specific resistance that measures wet mud after enzyme pretreatment is 143 ×
1010m/kg；Wherein, the mass ratio of the dispensing quality summation and dewatered sludge of lysozyme and protease is 0.12:1；In addition, to
It is added before lysozyme in wet mud after pH adjusted, lysozyme can be first dissolved in deionized water；To pre- through lysozyme
It is added before protease in wet mud that treated, protease can be first dissolved in deionized water.In addition, in the present embodiment,
The dewatered sludge be the wet mud by filtering and after 103~105 DEG C of drying in oven to the sludge that constant weight obtains, and this is dry
The quality of sludge is 60g.
Dehydration：Wet mud after enzyme pretreatment is carried out dehydrating, sludge filter cake is obtained, measures the sludge filtering
The moisture content of cake is 75.42%.Wherein, dehydration can utilize whizzer, belt pressure filter, plate and frame type filter-press, pipe
A kind of carry out sludge dewatering treatment in formula filter press, vacuum filter, sludge thickener.
Example IV
The present embodiment provides a kind of methods of reinforcement sludge dewatering, specifically include following steps：
Adjust pH value：Wet mud is weighed, adjusts the pH value of the wet mud to 6.5；Wherein, the tool of the pH value of wet mud is adjusted
Body step is first, the pH value of the wet mud to be measured using pH meter；Secondly, it is added into the wet mud according to measurement result
The weak base of a concentration of 0.1mol/L of 0.1mL after stirring evenly, measures the pH value of the wet mud, until the pH value of the wet mud is 6.5
When, stop that weak base is added；
Enzyme pretreatment：4g lysozymes are first added into the wet mud after pH adjusted, after stirring evenly temperature be 25 DEG C,
Frequency of oscillation is oscillating reactions 2h under 155rpm, and 4g protease is then added, and is 45 DEG C, oscillation frequency in temperature after stirring evenly
Rate is oscillating reactions 2h under 155rpm, after reaction is completed, the sludge specific resistance that measures wet mud after enzyme pretreatment is 232 ×
1010m/kg；Wherein, the mass ratio of the dispensing quality summation and dewatered sludge of lysozyme and protease is 0.13:1；In addition, to
It is added before lysozyme in wet mud after pH adjusted, lysozyme can be first dissolved in deionized water；To pre- through lysozyme
It is added before protease in wet mud that treated, protease can be first dissolved in deionized water.In addition, in the present embodiment,
The dewatered sludge be the wet mud by filtering and after 103~105 DEG C of drying in oven to the sludge that constant weight obtains, and this is dry
The quality of sludge is 60g.
Dehydration：Wet mud after enzyme pretreatment is carried out dehydrating, sludge filter cake is obtained, measures the sludge filtering
The moisture content of cake is 76.2%.Wherein, dehydration can utilize whizzer, belt pressure filter, plate and frame type filter-press, tubular type
A kind of carry out sludge dewatering treatment in filter press, vacuum filter, sludge thickener.
Embodiment five
The present embodiment provides a kind of methods of reinforcement sludge dewatering, specifically include following steps：
Adjust pH value：Wet mud is weighed, adjusts the pH value of the wet mud to 6.5；Wherein, the tool of the pH value of wet mud is adjusted
Body step is first, the pH value of the wet mud to be measured using pH meter；Secondly, it is added into the wet mud according to measurement result
The weak base of a concentration of 0.1mol/L of 0.1mL after stirring evenly, measures the pH value of the wet mud, until the pH value of the wet mud is 6.5
When, stop that weak base is added；
Enzyme pretreatment：4g lysozymes are first added into the wet mud after pH adjusted, after stirring evenly temperature be 25 DEG C,
Frequency of oscillation is oscillating reactions 2h under 155rpm, and 5g protease is then added, and is 45 DEG C, oscillation frequency in temperature after stirring evenly
Rate is oscillating reactions 2h under 155rpm, after reaction is completed, the sludge specific resistance that measures wet mud after enzyme pretreatment is 234 ×
1010m/kg；Wherein, the mass ratio of the dispensing quality summation and dewatered sludge of lysozyme and protease is 0.15:1；In addition, to
It is added before lysozyme in wet mud after pH adjusted, lysozyme can be first dissolved in deionized water；To pre- through lysozyme
It is added before protease in wet mud that treated, protease can be first dissolved in deionized water.In addition, in the present embodiment,
The dewatered sludge be the wet mud by filtering and after 103~105 DEG C of drying in oven to the sludge that constant weight obtains, and this is dry
The quality of sludge is 60g..
Dehydration：Wet mud after enzyme pretreatment is carried out dehydrating, sludge filter cake is obtained, measures the sludge filtering
The moisture content of cake is 77.39%.Wherein, dehydration can utilize whizzer, belt pressure filter, plate and frame type filter-press, pipe
A kind of carry out sludge dewatering treatment in formula filter press, vacuum filter, sludge thickener.
Comparative example 1-4
Except use cellulase replace protease and be added cellulase after reaction temperature for 53 DEG C in addition to, respectively with
Embodiment two, embodiment three, example IV, five identical mode of embodiment implement comparative example 1-4, gained sludge point after dehydration
D1, D2, D3, D4 are not named as it.
Further, after comparative example 1-4 enzyme pretreatments gained wet mud sludge specific resistance and comparative example 1-4 dehydrations after
The moisture content of gained sludge filter cake is specifically shown in the following table 1：
Table 1：The moisture content of the sludge specific resistance and sludge filter cake of wet mud in comparative example 1-4
By the sludge specific resistance data of above-mentioned experiment it is found that the dirt of the wet mud handled using lysozyme and cellulase
Mud resistivity is more much larger than using the sludge specific resistance of wet mud that lysozyme and Protease Treatment obtain, and due to sludge specific resistance value with
Dewatering is negatively correlated relationship (i.e. sludge specific resistance value is bigger, and dewatering is poorer), therefore, it is known that added using lysozyme
Added in albumen enzyme r e lease sludge by microorganism packet using lysozyme by the moisture ratio of microorganism package in cellulase release sludge
The moisture effect wrapped up in wants poor, it was demonstrated that lysozyme adds protease that can more effectively discharge the moisture wrapped up by microorganism in sludge, makes
Obtain the dehydrating effect of sludge more preferably.In conjunction with above-mentioned experiment moisture content it is found that adding albumen enzyme pretreatment using lysozyme after be dehydrated
The moisture content of obtained sludge filter cake than use lysozyme add cellulase pre-process after be dehydrated sludge filter cake it is aqueous
Rate wants small, further proves to add the dehydrating effect of the sludge after Protease Treatment more preferable using lysozyme.
In the present invention, the pH value of the wet mud in enzyme pretreatment is added the reaction temperature after lysozyme and egg is added
Reaction temperature after white enzyme has great influence to dewatering performance of sludge.PH value by adjusting wet mud is lysozyme and egg
White enzyme is hydrolyzed the optimum pH of reaction, and setting reaction temperature is respectively that lysozyme is hydrolyzed with protease and reacts
Preference temperature not only contributes to lysozyme hydrolysis cell wall and carbohydrate, to help to discharge intracellular combination water and sugared
The moisture of class package, and protease hydrolytic class glycoprotein is also helped, improve the whole dewatering of sludge.
At the same time, in the case where the dosage of lysozyme is certain, the dosage of protease also has dewatering performance of sludge
It has a major impact.In enzyme pretreatment, protease can not only hydrolyze class glycoprotein and discharge the moisture wrapped up by class glycoprotein, and
And the cell wall of a part of bacterium can be also hydrolyzed, the cell combination water of hardly possible removing is released, the dewatering of sludge is improved,
At the same time, the addition of protease can also change the organic matters such as protein in sludge, polysaccharide composition ratio, and protein with it is more
The relationship that the ratio of sugar is proportionate with dewatering performance of sludge, since the ratio of protein and polysaccharide is the addition with protease
First increase reduces afterwards, and therefore, the dewatering of sludge is also that the addition of the protease is first improved and reduced afterwards, that is to say, that
In the case that lysozyme is certain, the dewatering of reinforcement sludge is capable of in the addition of protease first, while being added in protease
When a certain amount of, moreover it is possible to further increase the dewatering of sludge.Therefore, the present invention is by a large amount of creative researchs, tests,
Just explore the method for above-mentioned reinforcement sludge dewatering and its corresponding technological parameter condition.
A kind of method of reinforcement sludge dewatering disclosed by the embodiments of the present invention is described in detail above, herein
In apply specific case principle and implementation of the present invention are described, the explanation of above example is only intended to sides
Assistant solves the method and its core concept of the present invention；Meanwhile for those of ordinary skill in the art, think of according to the present invention
Think, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification should not be construed as pair
The limitation of the present invention.
Claims (10)
1. a kind of method of reinforcement sludge dewatering, which is characterized in that include the following steps：
Adjust pH value：Wet mud is weighed, adjusts the pH value of the wet mud to 6.0~7.0；
Enzyme pretreatment：Bacteriolyze enzyme reaction is first added into the wet mud after pH adjusted, mmp reaction is then added；
Dehydration：The wet mud after the enzyme pretreatment is carried out dehydrating, sludge filter cake is obtained.
2. the method for reinforcement sludge dewatering according to claim 1, which is characterized in that in the step of the enzyme pretreatment
In rapid, the dispensing mass ratio of the lysozyme and the protease is 0.8:1~4:1.
3. the method for reinforcement sludge dewatering according to claim 1, which is characterized in that in the step of the enzyme pretreatment
In rapid, the lysozyme is 0.08 with the dispensing quality summation of the protease and the mass ratio of dewatered sludge:1~0.15:1.
4. the method for reinforcement sludge dewatering according to claim 1, which is characterized in that in the step of the enzyme pretreatment
In rapid, after lysozyme is added into the wet mud after pH adjusted, stirs evenly, be 25~35 DEG C, oscillation frequency in temperature
Rate is 1~3h of oscillating reactions under 140~180rpm；To through in the pretreated wet mud of lysozyme be added protease after,
It stirs evenly, 1~3h of oscillating reactions in the case where temperature is 40~50 DEG C, frequency of oscillation is 140~180rpm.
5. the method for reinforcement sludge dewatering according to claim 1, which is characterized in that in the step of the enzyme pretreatment
In rapid, before the lysozyme is added into the wet mud after pH adjusted, the lysozyme is first dissolved in deionization
In water；Before the protease is added in through the pretreated wet mud of the lysozyme, the protease is first molten
Solution is in deionized water.
6. the method for reinforcement sludge dewatering according to claim 1, which is characterized in that in the step of the enzyme pretreatment
In rapid, after the mmp reaction is added, the sludge specific resistance for measuring the wet mud is 23 × 1010~234 × 1010m/kg。
7. the method for reinforcement sludge dewatering according to claim 1, which is characterized in that adjust the pH of the wet mud
Value the specific steps are：
First, the pH value of the wet mud is measured using pH meter；
Secondly, weak acid or weak base are added into the wet mud according to measurement result, after stirring evenly, measure the wet mud
PH value until when the pH value of the wet mud is 6.0~7.0 stops that the weak acid or the weak base is added.
8. the method for reinforcement sludge dewatering according to claim 7, which is characterized in that the weak acid or the weak base
A concentration of 0.01~0.5mol/L.
9. the method for reinforcement sludge dewatering according to claim 1, which is characterized in that in the dehydration,
The dehydration is to utilize whizzer, belt pressure filter, plate and frame type filter-press, tubular filter press, vacuum filter, dirt
A kind of carry out sludge dewatering treatment in mud thickener.
10. the method for reinforcement sludge dewatering according to claim 1, which is characterized in that in the dehydration,
After dehydration is completed, the moisture content for measuring the sludge filter cake is 65%~78%.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110357390A (en) * | 2019-07-19 | 2019-10-22 | 中矿（天津）岩矿检测有限公司 | A kind of processing method and processing system for rural area irrigation canals and ditches sludge |
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| CN113880394A (en) * | 2021-08-31 | 2022-01-04 | 海环绿源环保科技(上海)有限公司 | Plant enzyme sludge dehydrating agent and sludge dehydrating method |
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| CN115947511A (en) * | 2022-06-20 | 2023-04-11 | 广东工业大学 | Method for breaking sludge |
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Application publication date: 20181002 |