CN105776785A - Diluting, conditioning and curing treatment method for sludge subjected to non-standardized treatment - Google Patents
Diluting, conditioning and curing treatment method for sludge subjected to non-standardized treatment Download PDFInfo
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- CN105776785A CN105776785A CN201610250832.8A CN201610250832A CN105776785A CN 105776785 A CN105776785 A CN 105776785A CN 201610250832 A CN201610250832 A CN 201610250832A CN 105776785 A CN105776785 A CN 105776785A
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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
- C02F11/008—Sludge treatment by fixation or solidification
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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
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
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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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Abstract
The invention discloses a diluting and conditioning method for sludge. According to the method, sludge floc structures are damaged through oxidation; hydrophilic organic groups are damaged and transformed into free components; meanwhile the molecular weight of organic macromolecular substance in sludge can be further reduced through the oxidation of hydrogen peroxide, breakage of binding bonds among high polymer skeletons is promoted, further bound water, capillary water and cell bound water in sludge floc colloid structures are released, and sludge viscidity is effectively reduced. The method for treating sludge subjected to non-standardized treatment lies in that sludge is subjected to diluting and conditioning treatment through the method; a cement-based mixing dehydration curing agent is added for sufficient stirring; the sludge is subjected to stabilized curing after dehydration curing, thereby meeting the requirement of sanitary landfill. The invention further discloses a laboratory and an industrial preparation method of the cement-based mixing dehydration curing agent. The method is simple in technology and low in cost, expands environment restoration technological approaches of sludge open storage grounds, and has high economic, social and environment benefits.
Description
Technical field
The invention belongs to environmental technology field, relate to the dilution conditioning solidification processing method of a kind of non-standard disposing sludge.
Background technology
Since late 1990s, along with developing rapidly of Chinese Urbanization, increasingly sharpening of environmental pollution, the quantity of municipal sewage plant is continuously increased, and substantial amounts of municipal sludge also produces then.Statistics according to China's house and urban construction department of town and country construction portion, at the end of cut-off 2013, National urban has sewage treatment plant 1736, Sewage Plant daily handling ability 12454 ten thousand stere, city year sewage disposal total amount 381.9 billion cubic meter, treatment rate of domestic sewage 89.34%, Biochemical method is adopted with the waste water in the whole nation 65%, every ten thousand t waste water of carrying out a biological disposal upon produce the estimation of 2.7t dewatered sludges, then the annual production of China's municipal wastewater treatment plant dewatered sludge reaches 1031.13 ten thousand t and (is converted into wet mud about 5155.65 ten thousand t of moisture content 80wt.%.
China's Treatment of Sludge is started late, and sewage treatment plant exists serious " the light mud of heavy water " phenomenon, and the weak link becoming China's field of water pollution control is disposed in the safe handling of mud.China is used for the 24～45% of the investment Jin Zhan sewage treatment plant gross investment of specific resistance to filtration, in the municipal sewage plant that China has built up, the application in existing sewage disposal of the sludge stabilizing disposal facility is less than 1/4, and sludge treatment technique and corollary equipment comparatively perfect less than 10%.Even if some has comparatively complete sludge treatment facilities, but due to the restriction of the factor such as fund, technology, much all cannot be properly functioning, the process of mud is extremely limited.Owing to China's specific resistance to filtration technology is seriously delayed, a large amount of mud are unprocessed to be directly discharged in environment.China's urban drainage shows with sewage disposal situation publication, China's sewage sludge harmlessness in 2013 processes disposal rate and is only 25.1%, the mud of more than 70% is not effectively addressed or directly throws aside, the discharge wantonly of mud and unreasonable disposal define a large amount of non-standard disposing sludge open storage ground, the high rheological behavior of mud and pollutant leach effect so as to form heterogeneous compound cross-contamination with surrounding enviroment, control extremely complex, stockyard surrounding soil and surface water environment are constituted a serious threat, the malodor problem that mud produces then has a strong impact on surrounding resident quality of life, highly touch government, the nerve of society and media, the solidification and stabilization of a large amount of non-standard disposing sludge processes has great application prospect.
Owing to existing sewage treatment plant adopts high polymer coagulant to carry out sludge conditioning mostly, therefore in open storage ground, mud often contains with the PAM high polymer coagulant component being representative, the hydrophilic group of this kind of flocculant makes mud be colloidal flocculation structure, there is hydrophilic and the retentiveness of height, make sewage sludge viscosity increase simultaneously, being difficult to pump and mix and blend, deep dehydration and subsequent cure stabilizing treatment difficulty are very big.Existing cement system dehydration hardener (cement, Calx, Gypsum Fibrosum and other calcium and magnesium salt, calcium and magnesium oxides) produces basicity due to its cheap price, stronger cementitiousness and hydration reaction, the static stabilization of the inorganic pollutions such as heavy metal and become the sludge dewatering firming agent of comparatively main flow at present.But, cement system dehydration hardener generally in dry powder form with mud hybrid reaction, then there is the technical bottleneck being difficult to be sufficiently mixed stirring in the mud that, viscosity on the low side for moisture content is bigger.In mud, macromolecule chain molecule can hinder the carrying out of hydrated reaction of cement simultaneously, the insoluble crystal that hydrated reaction of cement is formed is made to be wrapped in mud colloform texture with particulate form form, fail to realize cement bag colloidization, and then reduce the cured effect of mud.Therefore, non-standard disposing sludge on the low side for moisture content, that viscosity is relatively big, hydrophilic is high, developing low-cost, high efficiency dehydrating and curing technology, break through non-standard disposing sludge to be difficult to pumping, be difficult to and the technical bottleneck of dry powder firming agent mix and blend, strengthening sludge dewatering cured effect, the disposal that effectively processes for realizing non-standard disposing sludge has significant application value.
Summary of the invention
For the defect of prior art, it is an object of the invention to provide a kind of for the dilution Opsonizing method of mud and the processing method for non-standard disposing sludge, it is achieved the technical method that the effective dehydrating and curing of non-standard disposing sludge processes.
The preparation method that it is a further object to provide the cement based mixed dehydration firming agent used in a kind of above-mentioned sludge dewatering solidification process.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of dilution Opsonizing method for mud, mud flocculation structure is destroyed by Oxidation, destroy hydrophilic organic group and so as to be converted into free state component, the Oxidation of hydrogen peroxide also can reduce polymer molecular weight in mud simultaneously, promote the fracture of associative key between high polymer skeleton, in turn result in the release of Bound moisture, capillary water and Cell binding water in mud flco colloform texture, effectively reduce sewage sludge viscosity.
Further, described Oxidation utilizes oxidant to realize.
Described oxidant includes one or more in hydrogen peroxide, persulfate, potassium permanganate, Na2Fe04；Preferably, including: mass fraction concentration 30% industrial grade hydrogen peroxide solution dilution 5～10 times or mass fraction concentration 50～100mg/L potassium permanganate or mass fraction concentration 0.5～0.8% Na2Fe04 solution；Preferably, described dilution postindustrial level hydrogenperoxide steam generator mixes according to the mass ratio of 1:1 with pending mud.
A kind of processing method for non-standard disposing sludge, comprise the following steps: separate the rubbish sandstone in non-standard disposing sludge in open storage ground to be repaired, then adopt the dilution conditioning carrying out mud with the aforedescribed process to process, add cement based mixed dehydration firming agent to be sufficiently stirred for, after dehydrating and curing, mud carries out stabilisation maintenance, meets sanitary landfills requirement.
The moisture content of described pending mud is 80～95%.
The dosage of described cement based mixed dehydration firming agent is the 5～8% of pending mud butt quality.
The time of described stabilisation maintenance is at least 5～7d.
Further, the described processing method for non-standard disposing sludge, specifically may comprise steps of:
(1) aspirate mud in non-standard disposing sludge hole initially with screw pump, be delivered to above screen cloth, mud is carried out preliminary treatment, it is preferred that mesh size 100～500mm, rubbish sandstone thick in mud therefrom can be separated and transported outward；
(2) adopting conveying worm to deliver in agitating device in rubbish, the separated rear mud of sandstone, adopt positive displacement pump to add oxidant and carry out oxidation dilution conditioning, agitating device adopts double-shaft horizontal agitator, it is preferred that Stirring energy density 5～10W/m3, it is preferred that dilution stirring reaction duration 10～30min；
(3), after oxidation dilution conditioning, cement based dehydration hardener is added；Dehydration hardener is deposited in feed bin, and firming agent and dehydrant are lifted to feed bin top by electric block, by artificial mode, feed bin are fed in raw material；Dehydrant and firming agent feed bin are connected with the metering frequency conversion conveying worm of bin bottom respectively, by frequency conversion metering screw conveyer, the dehydration hardener determining dosage is sent into mixing agitator, mud passes through motor stirrer mix and blend with dehydrant and firming agent at mix and blend groove, it is preferred that mix and blend power density 5～10W/m3Preferred stirring reaction duration 10～30min, adjust dehydration in time according to pumping mud discharge and the nature parameters situation of change such as moisture content, viscosity and firming agent adds ratio, the job requirements realize accurate measurement, precisely adding, improves dehydration and curing reaction efficiency and process operation high efficiency, reliability；
(4) mud after mix and blend is pumped into integrative belt thickening and dewatering machine or filter press by booster pump, preferred filter pressing pressure 0.6MPa, dewatered sludge after filter pressing is transported by discharging spiral conveyor, short refute car then through promoting to deliver to after conveying worm promotes, be transported to sanitary landfills district and carry out sanitary landfills or cement kiln place carries out cement raw material coexistence and puts recycling.
The laboratory preparation method of described cement based mixed dehydration firming agent, comprises the following steps:
Adopt cone method: be (1～3) by mass ratio: the TNM1 type dehydration hardener of (5～7) and sulfur aluminum cement, sieve, mixed-stacking becomes coniform, then flatten, being piled up to center by surrounding sample and flatten after again forming circular cone, several times obtain cement based mixed dehydration firming agent so repeatedly；
Preferably, sieve described in and referred to the sieve of 0.05～1mm.
The industrial production process of described cement based mixed dehydration firming agent, comprises the following steps:
Adopt ball mill, TNM1 type dehydration hardener, sulfur aluminum cement are fully ground respectively, after crossing screen cloth, according to TNM1 type dehydration hardener: the mass ratio of sulfur aluminum cement is (1～3): (5～7) directly add in Dredged bed mud；
Preferably, sieve described in and referred to the sieve of 1～2mm.
Owing to adopting technique scheme, the present invention has the following advantages and beneficial effect:
The effective dehydrating and curing treatment technology method of non-standard disposing sludge of the present invention, utilize hydrogen peroxide, persulfate, potassium permanganate, in Na2Fe04, the strong oxidation of one or more destroys mud flocculation structure, destroy hydrophilic organic group and so as to be converted into free state component, the Oxidation of hydrogen peroxide also can reduce polymer molecular weight in mud simultaneously, promote the fracture of associative key between high polymer skeleton, in turn result in Bound moisture in mud flco colloform texture, the release of capillary water and Cell binding water, effectively reduce sewage sludge viscosity, breach non-standard disposing sludge to be difficult to pump, it is difficult to and the technical bottleneck of dry powder firming agent mix and blend, shorten mud maintenance drying time, formation for firming agent aquation crystal creates favourable reaction condition, the solidification effect of sludge dewatering firming agent is greatly improved.
Raw material selected by cement based mixed dehydration firming agent disclosed by the invention is the chemical products of market public offering, raw material is easy to get, dosage is low, increase-volume ratio is little, cheap, the quick mummification of mud is realized by TNM1 type dehydration hardener, utilize sulfur aluminum cement to generate insoluble crystal and improve solidification sludge comprcssive strength, it is achieved that the accurately collaborative of each component chemical characteristic of aluminium base gelling curing agent utilizes.
The present invention realizing non-standard disposing sludge low cost, wide scale security processes while disposing, expanded mud open storage ground site remediation technology approach, there is higher economy, society and environmental benefit.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention non-standard disposing sludge effective dehydrating and curing treatment technology method flow schematic diagram.
Fig. 2 is the solidification sludge water-cut trend figure (mass fraction concentration 30% industrial hydrogen peroxide solution dilution 10 times, TNM1, sulfur aluminum cement quality are than 3:7) of embodiment one；
Fig. 3 is the solidification sludge water-cut trend figure (mass fraction concentration 30% industrial hydrogen peroxide solution dilution 5 times, TNM1, sulfur aluminum cement quality are than 1:5) of embodiment two；
Fig. 4 is the solidification sludge water-cut trend figure (mass fraction concentration 30% industrial hydrogen peroxide solution dilution 8 times, TNM1, sulfur aluminum cement quality are than 2:6) of embodiment three.
Detailed description of the invention
Below in conjunction with accompanying drawing illustrated embodiment, the present invention is further detailed explanation.
As it is shown in figure 1, the sludge dewatering curing of the present invention mainly comprises the steps that
(1) aspirate mud in non-standard disposing sludge hole initially with screw pump, be delivered to above screen cloth, mud carried out preliminary treatment, mesh size 100～500mm, rubbish sandstone thick in mud therefrom can be separated and transported outward；
(2) adopting conveying worm to deliver in agitating device in rubbish, the separated rear mud of sandstone, adopt positive displacement pump to add oxidant and carry out oxidation dilution conditioning, agitating device adopts double-shaft horizontal agitator, Stirring energy density 5～10W/m3, dilute stirring reaction duration 10～30min；
(3), after oxidation dilution conditioning, cement based dehydration hardener is added；Dehydration hardener is deposited in feed bin, and firming agent and dehydrant (packed) are lifted to feed bin top by electric block, by artificial mode, feed bin are fed in raw material.Dehydrant and firming agent feed bin are connected with the metering frequency conversion conveying worm of bin bottom respectively, by frequency conversion metering screw conveyer, the dehydration hardener determining dosage is sent into mixing agitator, mud passes through motor stirrer mix and blend, mix and blend power density 5～10W/m with dehydrant and firming agent at mix and blend groove3Stirring reaction duration 10～30min, adjust dehydration in time according to pumping mud discharge and the nature parameters situation of change such as moisture content, viscosity and firming agent adds ratio, it is achieved accurate measurement, the job requirements precisely added, improve dehydration and curing reaction efficiency and process operation high efficiency, reliability；
(4) mud after mix and blend is pumped into integrative belt thickening and dewatering machine or filter press by booster pump, filter pressing pressure 0.6MPa, dewatered sludge after filter pressing is transported by discharging spiral conveyor, short refute car then through promoting to deliver to after conveying worm promotes, be transported to sanitary landfills district and carry out sanitary landfills or cement kiln place carries out cement raw material coexistence and puts recycling.
Prepare raw material used by the present invention and be technical grade；Mass fraction concentration 30% industrial hydrogen peroxide solution, mass fraction concentration 50～100mg/L technical grade potassium permanganate, mass fraction concentration 0.5～0.8% technical grade Na2Fe04 solution, TNM1 type sludge curing dehydrant, sulfur aluminum cement.
Embodiment 1 Xi'an refuse landfill mud outdoor storage hole sludge dewatering cured
(1) prepared by aluminium base gelling curing agent
Laboratory preparation method adopts cone method: by TNM1 type dehydration hardener that mass ratio is 3:7 and sulfur aluminum cement, cross 0.08mm sieve, mixed-stacking becomes coniform, then flatten, being piled up to center by surrounding sample and flatten after again forming circular cone, several times obtain cement based mixed dehydration firming agent so repeatedly；
Prepare aluminium base gelling curing agent 150g as stated above.
(2) the cured modified process of disposing sludge is treated
Treat that disposing sludge Basic Characteristics result is in Table 1.
Table 1 mud Basic Characteristics result
Take 300g moisture content about 90% mud sample described in table 1, the rubbish sandstone in mud separated, by after the industrial hydrogen peroxide solution dilution 10 times of mass fraction concentration 30% in mass ratio 1:1 add pending mud be sufficiently mixed with it stirring；Adding in (1) obtained cement based mixed dehydration firming agent, dosage is the 8% of mud butt quality, is sufficiently mixed after stirring centrifuge dehydration 10min in 5000r/min when.
(3) maintenance is stablized
By the solidification sludge abandoning supernatant of dehydration by centrifugation in (2), take that partial solid phase component is closely knit inserts high about 70mm, diameter is about in the tubular die of 35mm, form a cylindrical test specimen to be measured, the demoulding after maintenance 24h in 25 DEG C of environment, it is transferred under room temperature condition natural air drying 6d, then measures solidification sludge sample without lateral compressive strength by " earthwork test rule " (SL237-1999) described correlation technique；After all the other centrifugal gained solid phase ingredient centrifuge dehydrations under room temperature 25 DEG C, relative humidity 50% condition maintenance 5d, monitor moisture percentage in sewage sludge situation of change every day.
(4) the cured modified experimental result of bed mud
After hydrogenperoxide steam generator described in (2) dilutes, mud CST drops to 448.6, illustrate that mud water retention property is greatly improved, in maintenance 5d, moisture percentage in sewage sludge downward trend is as shown in Figure 2, during 5d, moisture percentage in sewage sludge reduces to 39.2%, unconfined compressive strength reaches 189.11kPa, meets mud sanitary landfills related request.
Embodiment 2 Xi'an refuse landfill mud outdoor storage hole sludge dewatering cured
(1) prepared by aluminium base gelling curing agent
Laboratory preparation method adopts cone method: by TNM1 type dehydration hardener that mass ratio is 1:5 and sulfur aluminum cement, cross 0.08mm sieve, mixed-stacking becomes coniform, then flatten, being piled up to center by surrounding sample and flatten after again forming circular cone, several times obtain cement based mixed dehydration firming agent so repeatedly；
Prepare aluminium base gelling curing agent 150g as stated above.
(2) the cured modified process of disposing sludge is treated
Treat that disposing sludge Basic Characteristics result is in Table 2.
Table 2 mud Basic Characteristics result
Take 300g moisture content about 90% mud sample described in table 1, the rubbish sandstone in mud separated, by after the industrial hydrogen peroxide solution dilution 5 times of mass fraction concentration 30% in mass ratio 1:1 add pending mud be sufficiently mixed with it stirring；Adding in (1) obtained cement based mixed dehydration firming agent, dosage is the 8% of mud butt quality, is sufficiently mixed after stirring centrifuge dehydration 10min in 5000r/min when.
(3) maintenance is stablized
By the solidification sludge abandoning supernatant of dehydration by centrifugation in (2), take that partial solid phase component is closely knit inserts high about 70mm, diameter is about in the tubular die of 35mm, form a cylindrical test specimen to be measured, the demoulding after maintenance 24h in 25 DEG C of environment, it is transferred under room temperature condition natural air drying 6d, then measures solidification sludge sample without lateral compressive strength by " earthwork test rule " (SL237-1999) described correlation technique；After all the other centrifugal gained solid phase ingredient centrifuge dehydrations under room temperature 25 DEG C, relative humidity 50% condition maintenance 6d, monitor moisture percentage in sewage sludge situation of change every day.
(4) the cured modified experimental result of bed mud
After hydrogenperoxide steam generator described in (2) dilutes, mud CST drops to 373.5, illustrate that mud water retention property is greatly improved, in maintenance 6d, moisture percentage in sewage sludge downward trend is as shown in Figure 3, during 6d, moisture percentage in sewage sludge reduces to 41.6%, unconfined compressive strength reaches 105.13kPa, meets mud sanitary landfills related request.
Embodiment 3 Xi'an refuse landfill mud outdoor storage hole sludge dewatering cured
(1) prepared by aluminium base gelling curing agent
Laboratory preparation method adopts cone method: by TNM1 type dehydration hardener that mass ratio is 2:6 and sulfur aluminum cement, cross 0.08mm sieve, mixed-stacking becomes coniform, then flatten, being piled up to center by surrounding sample and flatten after again forming circular cone, several times obtain cement based mixed dehydration firming agent so repeatedly；
Prepare aluminium base gelling curing agent 150g as stated above.
(2) the cured modified process of disposing sludge is treated
Treat that disposing sludge Basic Characteristics result is in Table 3.
Table 3 mud Basic Characteristics result
Take 300g moisture content about 90% mud sample described in table 1, the rubbish sandstone in mud separated, by after the industrial hydrogen peroxide solution dilution 10 times of mass fraction concentration 30% in mass ratio 1:1 add pending mud be sufficiently mixed with it stirring；Adding in (1) obtained cement based mixed dehydration firming agent, dosage is the 8% of mud butt quality, is sufficiently mixed after stirring centrifuge dehydration 10min in 5000r/min when.
(3) maintenance is stablized
By the solidification sludge abandoning supernatant of dehydration by centrifugation in (2), take that partial solid phase component is closely knit inserts high about 70mm, diameter is about in the tubular die of 35mm, form a cylindrical test specimen to be measured, the demoulding after maintenance 24h in 25 DEG C of environment, it is transferred under room temperature condition natural air drying 6d, then measures solidification sludge sample without lateral compressive strength by " earthwork test rule " (SL237-1999) described correlation technique；After all the other centrifugal gained solid phase ingredient centrifuge dehydrations under room temperature 25 DEG C, relative humidity 50% condition maintenance 6d, monitor moisture percentage in sewage sludge situation of change every day.
(4) the cured modified experimental result of bed mud
After hydrogenperoxide steam generator described in (2) dilutes, mud CST drops to 407.4, illustrate that mud water retention property is greatly improved, in maintenance 6d, moisture percentage in sewage sludge downward trend is as shown in Figure 4, during 6d, moisture percentage in sewage sludge reduces to 44.3%, unconfined compressive strength reaches 154.23kPa, meets mud sanitary landfills related request.
Embodiment 4 Wuxi City refuse landfill mud outdoor storage hole sludge dewatering cured
(1) prepared by aluminium base gelling curing agent
Laboratory preparation method adopts cone method: by TNM1 type dehydration hardener that mass ratio is 1:1 and sulfur aluminum cement, cross 0.05mm sieve, mixed-stacking becomes coniform, then flatten, being piled up to center by surrounding sample and flatten after again forming circular cone, several times obtain cement based mixed dehydration firming agent so repeatedly；
Prepare aluminium base gelling curing agent 150g as stated above.
(2) the cured modified process of disposing sludge is treated
Treat that disposing sludge Basic Characteristics result is in Table 4.
Table 4 mud Basic Characteristics result
Take 300g moisture content about 95% mud sample described in table 1, the rubbish sandstone in mud is separated, mass fraction concentration 0.8% technical grade Na2Fe04 solution 1:1 in mass ratio is added pending mud and is sufficiently mixed with it stirring；Adding in (1) obtained cement based mixed dehydration firming agent, dosage is the 5% of mud butt quality, is sufficiently mixed after stirring centrifuge dehydration 10min in 5000r/min when.
(3) maintenance is stablized
By the solidification sludge abandoning supernatant of dehydration by centrifugation in (2), take that partial solid phase component is closely knit inserts high about 70mm, diameter is about in the tubular die of 35mm, form a cylindrical test specimen to be measured, the demoulding after maintenance 24h in 25 DEG C of environment, it is transferred under room temperature condition natural air drying 5d, then measures solidification sludge sample without lateral compressive strength by " earthwork test rule " (SL237-1999) described correlation technique.
(4) the cured modified experimental result of bed mud
After hydrogenperoxide steam generator described in (2) dilutes, mud CST drops to 100.6s, illustrates that dewatering performance of sludge is greatly improved, and after maintenance 5d, unconfined compressive strength reaches 87.5kPa, meets mud sanitary landfills related request.
Embodiment 5 Wuxi City refuse landfill mud outdoor storage hole sludge dewatering cured
(1) prepared by aluminium base gelling curing agent
Laboratory preparation method adopts cone method: by TNM1 type dehydration hardener that mass ratio is 2:4 and sulfur aluminum cement, cross 0.1mm sieve, mixed-stacking becomes coniform, then flatten, being piled up to center by surrounding sample and flatten after again forming circular cone, several times obtain cement based mixed dehydration firming agent so repeatedly；
Prepare aluminium base gelling curing agent 150g as stated above.
(2) the cured modified process of disposing sludge is treated
Treat that disposing sludge Basic Characteristics result is in Table 5.
Table 5 mud Basic Characteristics result
Take 300g moisture content about 95% mud sample described in table 1, the rubbish sandstone in mud is separated, mass fraction concentration 0.5% technical grade Na2Fe04 solution is added pending mud and is sufficiently mixed with it stirring；Adding in (1) obtained cement based mixed dehydration firming agent, dosage is the 6% of mud butt quality, is sufficiently mixed after stirring centrifuge dehydration 10min in 5000r/min when.
(3) maintenance is stablized
By the solidification sludge abandoning supernatant of dehydration by centrifugation in (2), take that partial solid phase component is closely knit inserts high about 70mm, diameter is about in the tubular die of 35mm, form a cylindrical test specimen to be measured, the demoulding after maintenance 24h in 25 DEG C of environment, it is transferred under room temperature condition natural air drying 6d, then measures solidification sludge sample without lateral compressive strength by " earthwork test rule " (SL237-1999) described correlation technique.
(4) the cured modified experimental result of bed mud
After the Na2Fe04 solution-treated of mass fraction concentration 0.5% technical grade described in (2), mud CST drops to 146.8s, explanation dewatering performance of sludge is greatly improved, after maintenance 5d, unconfined compressive strength reaches 79.2kPa, meets mud sanitary landfills related request.
Embodiment 6 Shanghai City Sewage Plant open storage ground dewatered sludge cured
(1) prepared by aluminium base gelling curing agent
Laboratory preparation method adopts cone method: by TNM1 type dehydration hardener that mass ratio is 3:1 and sulfur aluminum cement, cross 0.08mm sieve, mixed-stacking becomes coniform, then flatten, being piled up to center by surrounding sample and flatten after again forming circular cone, several times obtain cement based mixed dehydration firming agent so repeatedly；
Prepare aluminium base gelling curing agent 150g as stated above.
(2) the cured modified process of disposing sludge is treated
Treat that disposing sludge Basic Characteristics result is in Table 6.
Table 6 mud Basic Characteristics result
Take 300g moisture content about 80% mud sample described in table 1, the rubbish sandstone in mud is separated, mass fraction concentration 100mg/L technical grade potassium permanganate solution 1:1 in mass ratio is added pending mud and is sufficiently mixed with it stirring；Adding in (1) obtained cement based mixed dehydration firming agent, dosage is the 8% of mud butt quality, is sufficiently mixed after stirring centrifuge dehydration 10min in 5000r/min when.
(3) maintenance is stablized
By the solidification sludge abandoning supernatant of dehydration by centrifugation in (2), take that partial solid phase component is closely knit inserts high about 70mm, diameter is about in the tubular die of 35mm, form a cylindrical test specimen to be measured, the demoulding after maintenance 24h in 25 DEG C of environment, it is transferred under room temperature condition natural air drying 7d, then measures solidification sludge sample without lateral compressive strength by " earthwork test rule " (SL237-1999) described correlation technique.
(4) the cured modified experimental result of bed mud
Mud after mass fraction concentration 100mg/L technical grade potassium permanganate solution described in (2) processes, after maintenance 7d, unconfined compressive strength reaches 56.3kPa, meets mud sanitary landfills related request.
Embodiment 7 Shanghai City Sewage Plant open storage ground dewatered sludge cured
(1) prepared by aluminium base gelling curing agent
Laboratory preparation method adopts cone method: by TNM1 type dehydration hardener that mass ratio is 2:4 and sulfur aluminum cement, cross 0.08mm sieve, mixed-stacking becomes coniform, then flatten, being piled up to center by surrounding sample and flatten after again forming circular cone, several times obtain cement based mixed dehydration firming agent so repeatedly；
Prepare aluminium base gelling curing agent 150g as stated above.
(2) the cured modified process of disposing sludge is treated
Treat that disposing sludge Basic Characteristics result is in Table 7.
Table 7 mud Basic Characteristics result
Take 300g moisture content about 80% mud sample described in table 1, the rubbish sandstone in mud is separated, mass fraction concentration 50mg/L technical grade potassium permanganate solution 1:1 in mass ratio is added pending mud and is sufficiently mixed with it stirring；Adding in (1) obtained cement based mixed dehydration firming agent, dosage is the 7% of mud butt quality, is sufficiently mixed after stirring centrifuge dehydration 10min in 5000r/min when.
(3) maintenance is stablized
By the solidification sludge abandoning supernatant of dehydration by centrifugation in (2), take that partial solid phase component is closely knit inserts high about 70mm, diameter is about in the tubular die of 35mm, form a cylindrical test specimen to be measured, the demoulding after maintenance 24h in 25 DEG C of environment, it is transferred under room temperature condition natural air drying 7d, then measures solidification sludge sample without lateral compressive strength by " earthwork test rule " (SL237-1999) described correlation technique.
(4) the cured modified experimental result of bed mud
Mud after mass fraction concentration 50mg/L technical grade potassium permanganate solution described in (2) processes, after maintenance 7d, unconfined compressive strength reaches 74.4kPa, meets mud sanitary landfills related request.
In sum, one non-standard disposing sludge dewatering and solidifying method of the present invention, comprise the following steps: the dewatered sludge arbitrarily stacked by open storage ground mixes with being diluted to certain proportion industry hydrogen peroxide, after being sufficiently stirred for hybrid reaction, carry out mix reaction again with cement based mixed dehydration firming agent, after tiling dry in the sun maintenance 5～7d, moisture percentage in sewage sludge is reduced to less than 50%, unconfined compressive strength is higher than 100kPa, meets mud sanitary landfills requirement.Present invention process is simple, with low cost, non-standard disposing sludge water retention property can be significantly improved, the dehydrating and curing not only achieving non-standard disposing sludge in shorter curing time section processes, make up to sanitary landfills index of correlation requirement, also open up mud open storage ground environment remediation technological approaches, there is higher economy, society and environmental benefit.
The above-mentioned description to embodiment is to be understood that for ease of those skilled in the art and apply the present invention.These embodiments obviously easily can be made various amendment by person skilled in the art, and General Principle described herein is applied in other embodiments without through performing creative labour.Therefore, the invention is not restricted to embodiment here, those skilled in the art's announcement according to the present invention, the improvement made without departing from scope and amendment all should within protection scope of the present invention.
Claims (10)
1. the dilution Opsonizing method for mud, it is characterized in that: destroy mud flocculation structure by Oxidation, destroy hydrophilic organic group and so as to be converted into free state component, the Oxidation of hydrogen peroxide also can reduce polymer molecular weight in mud simultaneously, promote the fracture of associative key between high polymer skeleton, in turn result in the release of Bound moisture, capillary water and Cell binding water in mud flco colloform texture, effectively reduce sewage sludge viscosity.
2. the dilution Opsonizing method for mud according to claim 1, it is characterised in that: described Oxidation utilizes oxidant to realize.
3. sludge dewatering curing according to claim 2, it is characterised in that: described oxidant includes one or more in hydrogen peroxide, persulfate, potassium permanganate, Na2Fe04；Preferably, including: mass fraction concentration 30% industrial grade hydrogen peroxide solution dilution 5～10 times or mass fraction concentration 50～100mg/L potassium permanganate or mass fraction concentration 0.5～0.8% Na2Fe04 solution；Preferably, described dilution postindustrial level hydrogenperoxide steam generator mixes according to the mass ratio of 1:1 with pending mud.
4. the processing method for non-standard disposing sludge, it is characterized in that: comprise the following steps: separate the rubbish sandstone in non-standard disposing sludge in open storage ground to be repaired, then the dilution conditioning that arbitrary described method in claims 1 to 3 carries out mud is adopted to process, add cement based mixed dehydration firming agent to be sufficiently stirred for, after dehydrating and curing, mud carries out stabilisation maintenance, meets sanitary landfills requirement.
5. the processing method for non-standard disposing sludge according to claim 4, it is characterised in that: the moisture content of described pending mud is 80～95%.
6. the processing method for non-standard disposing sludge according to claim 4, it is characterised in that: the dosage of described cement based mixed dehydration firming agent is the 5～8% of pending mud butt quality.
7. the processing method for non-standard disposing sludge according to claim 4, it is characterised in that: the time of described stabilisation maintenance is at least 5～7d.
8. the processing method for non-standard disposing sludge according to claim 4, it is characterised in that: comprise the following steps:
(1) aspirate mud in non-standard disposing sludge hole initially with screw pump, be delivered to above screen cloth, mud is carried out preliminary treatment, it is preferred that mesh size 100～500mm, rubbish sandstone thick in mud therefrom can be separated and transported outward；
(2) adopting conveying worm to deliver in agitating device in rubbish, the separated rear mud of sandstone, adopt positive displacement pump to add oxidant and carry out oxidation dilution conditioning, agitating device adopts double-shaft horizontal agitator, it is preferred that Stirring energy density 5～10W/m3, it is preferred that dilution stirring reaction duration 10～30min；
(3), after oxidation dilution conditioning, cement based dehydration hardener is added；Dehydration hardener is deposited in feed bin, and firming agent and dehydrant are lifted to feed bin top by electric block, by artificial mode, feed bin are fed in raw material；Dehydrant and firming agent feed bin are connected with the metering frequency conversion conveying worm of bin bottom respectively, by frequency conversion metering screw conveyer, the dehydration hardener determining dosage is sent into mixing agitator, mud passes through motor stirrer mix and blend with dehydrant and firming agent at mix and blend groove, it is preferred that mix and blend power density 5～10W/m3Preferred stirring reaction duration 10～30min, adjust dehydration in time according to pumping mud discharge and the nature parameters situation of change such as moisture content, viscosity and firming agent adds ratio, the job requirements realize accurate measurement, precisely adding, improves dehydration and curing reaction efficiency and process operation high efficiency, reliability；
(4) mud after mix and blend is pumped into integrative belt thickening and dewatering machine or filter press by booster pump, preferred filter pressing pressure 0.6MPa, dewatered sludge after filter pressing is transported by discharging spiral conveyor, short refute car then through promoting to deliver to after conveying worm promotes, be transported to sanitary landfills district and carry out sanitary landfills or cement kiln place carries out cement raw material coexistence and puts recycling.
9. the laboratory preparation method of the cement based mixed dehydration firming agent described in claim 4, it is characterised in that: comprise the following steps:
Adopt cone method: be (1～3) by mass ratio: the TNM1 type dehydration hardener of (5～7) and sulfur aluminum cement, sieve, mixed-stacking becomes coniform, then flatten, being piled up to center by surrounding sample and flatten after again forming circular cone, several times obtain cement based mixed dehydration firming agent so repeatedly；
Preferably, sieve described in and referred to the sieve of 0.05～1mm.
10. the industrial production process of the cement based mixed dehydration firming agent described in claim 4, it is characterised in that: comprise the following steps:
Adopt ball mill, TNM1 type dehydration hardener, sulfur aluminum cement are fully ground respectively, after crossing screen cloth, according to TNM1 type dehydration hardener: the mass ratio of sulfur aluminum cement is (1～3): (5～7) directly add in Dredged bed mud；
Preferably, sieve described in and referred to the sieve of 1～2mm.
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| CN106746478A (en) * | 2016-12-13 | 2017-05-31 | 浙江工业大学 | A kind of method using new dual oxidants system enhancement dewatering performance of sludge |
| CN107628737A (en) * | 2017-10-19 | 2018-01-26 | 中节能大地（杭州）环境修复有限公司 | A kind of method of disposal for filling class sludge |
| CN109485230A (en) * | 2018-12-14 | 2019-03-19 | 上海电力学院 | A kind of deep dehydration pretreating process filling sludge |
| CN109970302A (en) * | 2019-04-01 | 2019-07-05 | 上海环境绿色生态修复科技有限公司 | A kind of in-situ oxidation system and method for the landfill sludge that do not dispose properly |
| CN110208144A (en) * | 2019-06-12 | 2019-09-06 | 江苏新宜中澳环境技术有限公司 | It is a kind of for studying the viscosity model of activated sludge physical property in MBR |
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| CN113582476A (en) * | 2021-07-15 | 2021-11-02 | 深圳市天健(集团)股份有限公司 | Sludge treatment method |
| CN113582479A (en) * | 2021-07-22 | 2021-11-02 | 深圳市天健(集团)股份有限公司 | Method for solidifying and treating sludge in refuse dump |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106746478A (en) * | 2016-12-13 | 2017-05-31 | 浙江工业大学 | A kind of method using new dual oxidants system enhancement dewatering performance of sludge |
| CN107628737A (en) * | 2017-10-19 | 2018-01-26 | 中节能大地（杭州）环境修复有限公司 | A kind of method of disposal for filling class sludge |
| CN109485230A (en) * | 2018-12-14 | 2019-03-19 | 上海电力学院 | A kind of deep dehydration pretreating process filling sludge |
| CN109970302A (en) * | 2019-04-01 | 2019-07-05 | 上海环境绿色生态修复科技有限公司 | A kind of in-situ oxidation system and method for the landfill sludge that do not dispose properly |
| CN110208144A (en) * | 2019-06-12 | 2019-09-06 | 江苏新宜中澳环境技术有限公司 | It is a kind of for studying the viscosity model of activated sludge physical property in MBR |
| CN110208144B (en) * | 2019-06-12 | 2021-10-26 | 江苏新宜中澳环境技术有限公司 | Viscosity model for researching physical property of activated sludge in MBR (membrane bioreactor) |
| CN113493289A (en) * | 2021-07-15 | 2021-10-12 | 深圳市市政工程总公司 | Method for treating sludge in refuse dump |
| CN113501634A (en) * | 2021-07-15 | 2021-10-15 | 深圳市市政工程总公司 | Sludge solidification treatment method |
| CN113582476A (en) * | 2021-07-15 | 2021-11-02 | 深圳市天健(集团)股份有限公司 | Sludge treatment method |
| CN113582479A (en) * | 2021-07-22 | 2021-11-02 | 深圳市天健(集团)股份有限公司 | Method for solidifying and treating sludge in refuse dump |
| CN116655214A (en) * | 2023-08-01 | 2023-08-29 | 北京环球中科水务科技股份有限公司 | Sludge conditioning method, device, electronic equipment and storage medium |
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