CN105330087A - Processing method of styrene butadiene rubber production wastewater - Google Patents
Processing method of styrene butadiene rubber production wastewater Download PDFInfo
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- CN105330087A CN105330087A CN201410327669.1A CN201410327669A CN105330087A CN 105330087 A CN105330087 A CN 105330087A CN 201410327669 A CN201410327669 A CN 201410327669A CN 105330087 A CN105330087 A CN 105330087A
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Abstract
The invention discloses a processing method of styrene butadiene rubber production wastewater. The method includes the following steps: (1) adding activated sludge after wall-breaking treatment in wastewater, and conducting flotation treatment; (2) conducting hydrolysis acidification on the wastewater subjected to flotation treatment; (3) conducting activated sludge treatment on the waste water after hydrolysis and acidification treatment to obtain residual activated sludge after treatment and treated water; and subjecting at least part of the residual activated sludge after treatment to wall-breaking treatment and using the residual activated sludge in the step (1). According to the treatment method of the invention, the treated styrene butadiene rubber production wastewater has COD less than 50mg / L, and the sludge discharge is significantly reduced.
Description
Technical field
The present invention relates to the treatment process of trade effluent, particularly, relate to a kind for the treatment of process of styrene-butadiene rubber(SBR) factory effluent.
Background technology
The excellent property of styrene-butadiene rubber(SBR), to be widely used, its demand and turnout huge.But the consequent is the process problem of a large amount of factory effluent.Containing various auxiliary agents such as glue slag, oligopolymer and emulsifying agent, initiator, conditioning agent and terminators in this waste water, complicated component, be difficult to degraded, and oligopolymer is easily assembled along with the change of environment.The treatment process of general conventional styrene-butadiene rubber(SBR) factory effluent is that independent processing is less to a whole set of technology of qualified discharge by itself and other waste water combination treatment.
Usually, activated sludge process is a kind of most popular method in wastewater treatment.But, adopting in activated sludge process process that styrene-butadiene rubber(SBR) factory effluent is processed, producing unnecessary active sludge because microorganism carries out continuous print synthesis and propagation and must discharge system.The discharge of excess sludge becomes the newborn problem after wastewater treatment.
For this reason, Chinese patent application CN1145880A openly have employed air supporting and anaerobic acidification disposal methods styrene-butadiene rubber(SBR) class waste water, and particularly, the method comprises: a, to be carried out by sbr wastewater helping solidifying and flocculation intensive treatment; B, by through step (a) process after waste water carry out two-stage air-flotation process again; C, employing " TAO " method carry out sbr wastewater secondary biochemical treatment, and particularly, this process comprises one-level anaerobic acidification and secondary aerobic biochemical; D, again the waste water processed through step (c) to be discharged after filtering.But need additionally to add flocculation agent in the air-flotation process process in the method for this patent application, and adopt the COD value of the waste water after the method process still higher, its treatment effect is still to be improved.
Summary of the invention
Technical problem to be solved by this invention is: need additionally to add flocculation agent in the air-flotation process process in the method for existing process styrene-butadiene rubber(SBR) class waste water, and the COD value of the waste water obtained after process is higher, and the quantity discharged of active sludge is larger.
In order to solve the problems of the technologies described above, the invention provides a kind of technical scheme:
(1) in waste water, add the active sludge through broken wall treatment, and carry out air-flotation process;
(2) be hydrolyzed the waste water through air-flotation process acidifying;
(3) waste water through acidication is carried out active sludge treatment, obtain the rear remaining active sludge of process and treated water;
Wherein, remaining active sludge after at least part of described process carried out broken wall treatment and be used in step (1).
The Advantageous Effects that the present invention obtains is:
(1) in method of the present invention, active sludge is after broken wall treatment, the active sludge containing macromolecular compounds such as stripping protein sugar, mucopolysaccharide, protein, Mierocrystalline cellulose, DNA in zoogloea and microorganism cells can be obtained, by this active sludge through broken wall treatment is used in air-flotation process operation, zoogloea can play the effect of oligopolymer in absorption waste water, cell leachable can play the effect of biological flocculant, thus, do not need in method of the present invention additionally to add water treatment agent, as flocculation agent etc.
(2) in method of the present invention, active sludge through broken wall treatment can as outer Ensure Liquid, improve the biodegradability of waste water, thus the treatment effect of subsequent biochemical processing unit as active sludge treatment unit can be improved, make the COD value of the treated water finally obtained relatively low, particularly, the COD value of treated water is less than 50mg/L.
(3) in method of the present invention, by being back in air-flotation process process by active sludge remaining in active sludge treatment, the quantity discharged of active sludge is greatly reduced like this.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification sheets, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the process flow sheet of styrene-butadiene rubber(SBR) production wastewater treatment.
Description of reference numerals
1 air flotation pool
2 hydrolysis acidification pools
3 biochemical treatment unit
4 settling tanks
5 broken wall treatment unit
6 concentrated incinerators
Embodiment
Below the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
The invention provides a kind for the treatment of process of styrene-butadiene rubber(SBR) factory effluent, particularly, the method comprises:
(1) in waste water, add the active sludge through broken wall treatment, and carry out air-flotation process;
(2) be hydrolyzed the waste water through air-flotation process acidifying;
(3) waste water through acidication is carried out active sludge treatment, obtain the rear remaining active sludge of process and treated water;
Wherein, remaining active sludge after at least part of described process carried out broken wall treatment and be used in step (1).
In the present invention, the object of described broken wall treatment improves composition and the character of active sludge.Therefore, the method that can realize above-mentioned broken wall treatment object that this area routine uses all is applicable in the present invention, and such as, the method for described broken wall treatment can be supersound process or ozone Oxidation Treatment.The condition of described supersound process can comprise: ultrasonic intensity is 0.5-1.5W/mL, and the treatment time is 5-15min, and unit " W/mL " refers to relative to every milliliter of active sludge, and hyperacoustic acoustic density is 0.5-1.5 watt.The condition of described ozonize can comprise: the consumption of described ozone is 0.01-0.05gO
3/ gTS, the treatment time is 5-15min, unit " gO
3/ gTS " refer to that, relative to every gram of active sludge dry weight, the ozone amount added is 0.01-0.05 gram.
In the present invention, the object of described air-flotation process is separated suspended substance in waste water and oligopolymer.In air-flotation process process, the feature of waste water itself can be made full use of: the glue slag density in (1) waste water and water close, be easy to bubble floating; (2) additives such as the emulsifying agent in waste water, initiator, terminator have surfactivity, pore forming material can be served as, bubble drives as carrier on the suspended substance in waste water and floats on wastewater surface, thus isolates the glue slag that suspends in waste water and adsorbed the zoogloea of oligopolymer.The condition of described air-flotation process can be determined according to the processing condition of this area routine, and under preferable case, the condition of described air-flotation process comprises: hydraulic detention time is 10-50min, and hydraulic surface loading is 2-10m
3/ (m
2h).
In the present invention, described acidication treatment process is a kind of method between aerobic and anaerobic treatment method, be dissolved organic matter by insoluble hydrolysis of organic matter under a large amount of hydrolytic bacteria, the effect of acidifying bacterium, the macromolecular substance of difficult for biological degradation is converted into the process of the small-molecule substance of readily biodegradable, thus improves the biodegradability of waste water.The condition of described acidication process can be determined according to the processing condition of this area routine, and under preferable case, the condition of described acidication process comprises: hydraulic detention time is 2-10h, and useless oxygen in water is 0.1-0.5mg/L.
According to the present invention, the method for the waste water after acidication process being carried out to active sludge treatment can be implemented according to the method for this area routine, and its implementation condition also can be selected in the active sludge treatment condition of routine.Particularly, the condition of described active sludge treatment can comprise: the concentration of active sludge is 2500-5000mg/L, and useless oxygen in water is 2-4mg/L, and hydraulic detention time is 8-20h.In the present invention, described active sludge is the conventional active sludge used in biochemical process field.
In the present invention, active sludge and the water (i.e. water outlet) after processing carry out precipitate and separate in settling tank.Wherein, amount of activated mud can be circulated back to active sludge treatment unit through sludge reflux and carry out active sludge treatment, and the active sludge not being back to active sludge treatment unit is remaining active sludge.
In the present invention, after active sludge treatment, remaining active sludge can in the air supporting operation partly or entirely for step (1) after broken wall treatment, particularly, remaining active sludge after the described process of 50-100 % by weight can be carried out broken wall treatment and be used in step (1).
In the present invention, when opening wastewater treatment process, the active sludge through broken wall treatment in step (1) can derive from fresh active sludge, also can derive from the remaining active sludge of other active sludge treatment operation; After wastewater treatment process carries out for some time, the active sludge through broken wall treatment in step (1) preferably partly or entirely derives from the active sludge treatment operation of step (3), most preferably is the active sludge treatment operation all deriving from step (3).
In the present invention, venomous injurant confrontation environment after the described process of the scum silica frost produced to prevent air-flotation process process and non-broken wall reuse in remaining active sludge, described method preferably also comprises: carried out concentrating and burning by remaining active sludge after the described process of the scum silica frost produced in air-flotation process process and/or non-broken wall reuse.
According to a kind of embodiment of the present invention, the implementation process of the treatment process of described styrene-butadiene rubber(SBR) factory effluent as shown in Figure 1, particularly, enter air flotation pool 1 after styrene-butadiene rubber(SBR) factory effluent (namely intaking) mixes with the active sludge through broken wall treatment from broken wall treatment unit 5 and carry out air-flotation process, then the waste water through air-flotation process enters in hydrolysis acidification pool 2 acidification that is hydrolyzed, enter biochemical treatment unit 3 (such as complete hybrid aeration tank) afterwards and carry out active sludge treatment, then enter in settling tank 4 and precipitate, isolate active sludge and treated water (i.e. water outlet), amount of activated mud can be circulated back to biochemical treatment unit 3 (such as complete hybrid aeration tank) through sludge reflux and carry out active sludge treatment, rest part is remaining active sludge, then part or all of described remaining active sludge is injected described broken wall treatment unit 5 and carry out broken wall treatment, and the active sludge through broken wall treatment is mixed to realize reuse with styrene-butadiene rubber(SBR) factory effluent, the scum silica frost simultaneously produced by air-flotation process and/or the described remaining active sludge not injecting described broken wall treatment unit 5 process at concentrated incinerator 6.
Below will be described the present invention by embodiment.
The water quality of the styrene-butadiene rubber(SBR) factory effluent used in following examples and comparative example is in table 1.
Table 1
| Factory effluent | COD(mg/L) | Turbidity (mg/L) | pH |
| 1 | 632 | 43 | 4.3 |
| 2 | 685 | 36 | 5.2 |
| 3 | 725 | 39 | 4.8 |
| 4 | 766 | 41 | 4.6 |
Embodiment 1
The present embodiment is for illustration of the treatment process of described styrene-butadiene rubber(SBR) factory effluent provided by the invention.
Active sludge is carried out ozone oxidation to carry out broken wall to active sludge, the ozone amount added in ozone oxidation process is 0.03gO
3/ gTS, the treatment time is 10min; Active sludge through ozone oxidation is mixed with sbr wastewater, then injects air flotation pool 1 and carry out air-flotation process, hydraulic detention time 30min, waterpower surface load 6m
3/ (m
2h); Then enter hydrolysis acidification pool 2 through the waste water of air-flotation process to be hydrolyzed acidification, hydraulic detention time 7h, useless oxygen in water is 0.2mg/L; Enter complete hybrid aeration tank 3 through the waste water of acidication process afterwards and carry out active sludge treatment, activated sludge concentration is 3000mg/L, and water outlet dissolved oxygen is 2mg/L, and hydraulic detention time is 14h; Then Activated Sludge Process products therefrom is injected settling tank 4 to precipitate, isolating active mud and treated water, residence time 2h, and carry out reuse after the remaining active sludge of 100 % by weight is carried out above-mentioned ozone oxidation; Simultaneously by concentrated for air-flotation process process gained scum silica frost rear burning.Result is in table 2.
Embodiment 2
The present embodiment is for illustration of the treatment process of described styrene-butadiene rubber(SBR) factory effluent provided by the invention.
Carried out by active sludge ultrasonic to carry out broken wall to active sludge, hyperacoustic acoustic density is 1.0W/mL, and the treatment time is 10min; Active sludge through supersound process is mixed with sbr wastewater, then injects air flotation pool 1 and carry out air-flotation process, hydraulic detention time 25min, waterpower surface load 7m
3/ (m
2h); Then enter hydrolysis acidification pool 2 through the waste water of air-flotation process to be hydrolyzed acidification, hydraulic detention time 5h, useless oxygen in water is 0.3mg/L; Enter complete hybrid aeration tank 3 through the waste water of acidication process afterwards and carry out active sludge treatment, activated sludge concentration is 3500mg/L, and water outlet dissolved oxygen is 4mg/L, and hydraulic detention time is 16h; Then Activated Sludge Process products therefrom is injected settling tank 4 to precipitate, isolating active mud and treated water, residence time 4h, and carry out reuse after the remaining active sludge of 80 % by weight is carried out above-mentioned ozone oxidation; The excess sludge of air-flotation process process gained scum silica frost and non-reuse is concentrated rear burning simultaneously.Result is in table 2.
Embodiment 3
The present embodiment is for illustration of the treatment process of described styrene-butadiene rubber(SBR) factory effluent provided by the invention.
Active sludge is carried out ozone oxidation to carry out broken wall to active sludge, the ozone amount added in ozone oxidation process is 0.01gO
3/ gTS, the treatment time is 15min; Active sludge through ozone oxidation is mixed with sbr wastewater, then injects air flotation pool 1 and carry out air-flotation process, hydraulic detention time 35min, waterpower surface load 5m
3/ (m
2h); Then enter hydrolysis acidification pool 2 through the waste water of air-flotation process to be hydrolyzed acidification, hydraulic detention time 6h, useless oxygen in water is 0.4mg/L; Enter complete hybrid aeration tank 3 through the waste water of acidication process afterwards and carry out active sludge treatment, activated sludge concentration is 4000mg/L, and water outlet dissolved oxygen is 3mg/L, and hydraulic detention time is 12h; Then Activated Sludge Process products therefrom is injected settling tank 4 to precipitate, isolating active mud and treated water, residence time 3h, and carry out reuse after the remaining active sludge of 90 % by weight is carried out above-mentioned ozone oxidation; The excess sludge of air-flotation process process gained scum silica frost and non-reuse is concentrated rear burning simultaneously.Result is in table 2.
Embodiment 4
The present embodiment is for illustration of the treatment process of described styrene-butadiene rubber(SBR) factory effluent provided by the invention.
Carried out by active sludge ultrasonic to carry out broken wall to active sludge, hyperacoustic acoustic density is 1.5W/mL, and the treatment time is 5min; Active sludge through supersound process is mixed with sbr wastewater, then injects air flotation pool 1 and carry out air-flotation process, hydraulic detention time 40min, waterpower surface load 4m
3/ (m
2h); Then enter hydrolysis acidification pool 2 through the waste water of air-flotation process to be hydrolyzed acidification, hydraulic detention time 4h, useless oxygen in water is 0.1mg/L; Enter complete hybrid aeration tank 3 through the waste water of acidication process afterwards and carry out active sludge treatment, activated sludge concentration is 4500mg/L, and water outlet dissolved oxygen is 4mg/L, and hydraulic detention time is 8h; Then Activated Sludge Process products therefrom is injected settling tank 4 to precipitate, isolating active mud and treated water, residence time 5h, and carry out reuse after the remaining active sludge of 50 % by weight is carried out above-mentioned ozone oxidation; The excess sludge of air-flotation process process gained scum silica frost and non-reuse is concentrated rear burning simultaneously.Result is in table 2.
Embodiment 5
The present embodiment is for illustration of the treatment process of described styrene-butadiene rubber(SBR) factory effluent provided by the invention.
Active sludge is carried out ozone oxidation to carry out broken wall to active sludge, the ozone amount added is 0.05gO
3/ gTS, the treatment time is 5min; Excess sludge through ozone oxidation adds in sbr wastewater 2; The above-mentioned waste water adding excess sludge is carried out air-flotation process, hydraulic detention time 20min, waterpower surface load 8m
3/ (m
2h); Water outlet through air-flotation process is hydrolyzed acidification, hydraulic detention time 8h, and useless oxygen in water is 0.5mg/L; Active sludge treatment is carried out in water outlet through acidication process, and activated sludge concentration is 3500mg/L, and water outlet dissolved oxygen is 2mg/L, and hydraulic detention time is 20h; Then Activated Sludge Process products therefrom is injected settling tank 4 to precipitate, isolating active mud and treated water, residence time 3h, and the excess sludge of 70 % by weight is carried out reuse after ozone oxidation; The excess sludge of the scum silica frost of air-flotation process and non-reuse is merged concentrated rear burning simultaneously.Result is in table 2.
Embodiment 6
The present embodiment is for illustration of the treatment process of described styrene-butadiene rubber(SBR) factory effluent provided by the invention.
Carried out by active sludge ultrasonic to carry out broken wall to active sludge, hyperacoustic acoustic density is 0.5W/mL, and the treatment time is 15min; Active sludge through supersound process is mixed with sbr wastewater, then injects air flotation pool 1 and carry out air-flotation process, hydraulic detention time 50min, waterpower surface load 2m
3/ (m
2h); Then enter hydrolysis acidification pool 2 through the waste water of air-flotation process to be hydrolyzed acidification, hydraulic detention time 10h, useless oxygen in water is 0.3mg/L; Enter complete hybrid aeration tank 3 through the waste water of acidication process afterwards and carry out active sludge treatment, activated sludge concentration is 5000mg/L, and water outlet dissolved oxygen is 3mg/L, and hydraulic detention time is 10h; Then Activated Sludge Process products therefrom is injected settling tank 4 to precipitate, isolating active mud and treated water, residence time 4h, and carry out reuse after the remaining active sludge of 60 % by weight is carried out above-mentioned ozone oxidation; The excess sludge of air-flotation process process gained scum silica frost and non-reuse is concentrated rear burning simultaneously.Result is in table 2.
Embodiment 7
The present embodiment is for illustration of the treatment process of described styrene-butadiene rubber(SBR) factory effluent provided by the invention.
Active sludge is carried out ozone oxidation to carry out broken wall to active sludge, the ozone amount added is 0.03gO
3/ gTS, the treatment time is 10min; Excess sludge through ozone oxidation adds in sbr wastewater 2; The above-mentioned waste water adding excess sludge is carried out air-flotation process, hydraulic detention time 10min, waterpower surface load 10m
3/ (m
2h); Water outlet through air-flotation process is hydrolyzed acidification, hydraulic detention time 2h, and useless oxygen in water is 0.4mg/L; Active sludge treatment is carried out in water outlet through acidication process, and activated sludge concentration is 2500mg/L, and water outlet dissolved oxygen is 2mg/L, and hydraulic detention time is 18h; Then Activated Sludge Process products therefrom is injected settling tank 4 to precipitate, isolating active mud and treated water, residence time 2h, carries out reuse by the excess sludge of 80 % by weight after ozone oxidation; The scum silica frost of air-flotation process and the excess sludge of non-reuse merge concentrated rear burning.Result is in table 2.
Comparative example 1
Method according to embodiment 1 processes sbr wastewater, and difference is, is back to the active sludge of air-flotation process without broken wall treatment, directly mixes with sbr wastewater, then injects air flotation pool 1 and carries out air-flotation process.Result is in table 2.
Comparative example 2
Method according to embodiment 1 processes sbr wastewater, and difference is, does not add active sludge in sbr wastewater, directly injects separately air flotation pool 1 and carries out air-flotation process.Result is in table 2.
Table 2
Data according to table 2 can be found out, the treatment process according to styrene-butadiene rubber(SBR) factory effluent of the present invention effectively can process sbr wastewater, by the COD value process of sbr wastewater to lower level, particularly, can process to being less than 50mg/L.By embodiment 1 and comparative example 1 and 2 are compared and can find out, do not add active sludge or the active sludge that adds without broken wall treatment in the air-flotation process stage, the COD value of the water outlet finally obtained all can be caused relatively high; And the excess sludge that comparative example 2 produces is not used, quantity discharged is large, adds the burden of sludge treatment.
Claims (9)
1. a treatment process for styrene-butadiene rubber(SBR) factory effluent, the method comprises the following steps:
(1) in waste water, add the active sludge through broken wall treatment, and carry out air-flotation process;
(2) be hydrolyzed the waste water through air-flotation process acidifying;
(3) waste water through acidication is carried out active sludge treatment, obtain the rear remaining active sludge of process and treated water;
Wherein, remaining active sludge after at least part of described process carried out broken wall treatment and be used in step (1).
2. method according to claim 1, wherein, the method for described broken wall treatment is supersound process or ozone Oxidation Treatment.
3. method according to claim 2, wherein, the condition of described supersound process comprises: ultrasonic wave acoustic energy density is 0.5-1.5W/mL, and the treatment time is 5-15min.
4. method according to claim 2, wherein, the condition of described ozone Oxidation Treatment comprises: the consumption of described ozone is 0.01-0.05gO
3/ gTS, the treatment time is 5-15min.
5. according to the method in claim 1-4 described in any one, wherein, the condition of described air-flotation process comprises: hydraulic detention time is 10-50min, and hydraulic surface loading is 2-10m
3/ (m
2h).
6. according to the method in claim 1-4 described in any one, wherein, the condition of described acidication process comprises: hydraulic detention time is 2-10h, and useless oxygen in water is 0.1-0.5mg/L.
7. according to the method in claim 1-4 described in any one, wherein, the condition of described active sludge treatment comprises: described activated sludge concentration is 2500-5000mg/L, and useless oxygen in water is 2-4mg/L, and waste water hydraulic detention time is 8-20h.
8. according to the method in claim 1-7 described in any one, wherein, remaining active sludge after the described process of 50-100 % by weight carried out broken wall treatment and be used in step (1).
9. according to the method in claim 1-8 described in any one, wherein, described method also comprises: carried out concentrating and burning by remaining active sludge after the described process of the scum silica frost produced in air-flotation process process and/or non-broken wall reuse.
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| CN201410327669.1A CN105330087B (en) | 2014-07-10 | 2014-07-10 | A kind of processing method of butadiene-styrene rubber production waste water |
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| CN201410327669.1A CN105330087B (en) | 2014-07-10 | 2014-07-10 | A kind of processing method of butadiene-styrene rubber production waste water |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134144A (en) * | 2011-03-28 | 2011-07-27 | 陆大培 | Treatment process of butadiene styrene rubber sewage |
| CN102730862A (en) * | 2011-04-01 | 2012-10-17 | 中国石油化工股份有限公司 | Sewage treatment method in synthetic rubber production |
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2014
- 2014-07-10 CN CN201410327669.1A patent/CN105330087B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134144A (en) * | 2011-03-28 | 2011-07-27 | 陆大培 | Treatment process of butadiene styrene rubber sewage |
| CN102730862A (en) * | 2011-04-01 | 2012-10-17 | 中国石油化工股份有限公司 | Sewage treatment method in synthetic rubber production |
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