CN203187488U - System for treating DCP (dicalcium phosphate) wastewater - Google Patents
System for treating DCP (dicalcium phosphate) wastewater Download PDFInfo
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- CN203187488U CN203187488U CN2012205732040U CN201220573204U CN203187488U CN 203187488 U CN203187488 U CN 203187488U CN 2012205732040 U CN2012205732040 U CN 2012205732040U CN 201220573204 U CN201220573204 U CN 201220573204U CN 203187488 U CN203187488 U CN 203187488U
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Abstract
The utility model discloses a system for treating DCP (dicalcium phosphate) wastewater. The system comprises a first level facultative tank used for performing first level facultative biochemical treatment on the DCP wastewater, a first level aerobic pool used for performing first level aerobic biochemical treatment on the discharge water of the first level facultative biochemical treatment, an optional catalytic oxidation pool used for performing catalytic oxidation treatment on the discharge water of the first level aerobic biochemical treatment, and a second level biochemical pool used for performing second level biochemical treatment on the discharge water of the first level aerobic biochemical treatment or the discharge water of the catalytic oxidation treatment if the catalytic oxidation pool exists. The treatment system provided by the utility model can be used for effectively treating the DCP wastewater without generating secondary pollution of H2S.
Description
Technical field
The utility model relates to treatment process and the treatment system of fine chemistry industry factory effluent, relates more specifically to treatment process and the treatment system of dicumyl peroxide (DCP) factory effluent.
Background technology
DCP is a kind of organo-peroxide linking agent, mainly as various olefin polymers and the linking agent of multipolymer (as polyethylene, chlorinatedpolyethylene, silicon rubber etc.) and the polymerization starter of polystyrene, also can be used as the solidifying agent of unsaturated polyester resin.After DCP is crosslinked, the physical properties of polymkeric substance is greatly improved, and heat impedance, chemical resistant properties, resistance to pressure, splitting resistance and physical strength all increase to some extent.DCP is widely used in industries such as electric wire, shoemaking, building materials, and in recent years along with the continuous expansion in macromolecular material market, the demand of DCP increases year by year, and market potential is huge.
Industrial production DCP is to be raw material with the isopropyl benzene, make the isopropyl benzene reaction generate hydrogen phosphide cumene by oxidation, and make part hydrogen phosphide cumene reaction generate dimethyl benzyl alcohol by reduction, make dimethyl benzyl alcohol and hydrogen phosphide cumene generation condensation reaction generation DCP then.
Produce a large amount of waste water in the DCP production process, wherein organic pollutant comprises hydrogen phosphide cumene, over hydrogenation diisopropylbenzene(DIPB), isopropyl benzene, methyl phenyl ketone, benzylalcohol, dimethyl sulfoxide (DMSO), vinyl toluene, phenol (alkalescence is dissolved in the waste water and embodies with the phenol na form); Inorganic pollutant comprises oxalic acid, ferrous sulfate, sodium sulfate, sodium sulphite, perchloric acid, Sulfothiorine.
Organic compound in the DCP waste water has very big harm and pollution to the person and environment, and wherein the harm of phenol is more outstanding, and the high density inorganic salt then restrict the microbial activity in the biochemical system.
At present, domestic to high concentration COD
CrWaste water mainly adopts " anaerobic biological+aerobic biochemical+little electrolysis " method to handle, and purpose is at first by anaerobic treatment waste water to be hydrolyzed and acidifying, handles COD to improve follow-up aerobic biochemical
CrClearance, the organism that utilizes little electrolysis treatment biological process to be difficult to degrade at last.
Yet, for DCP factory effluent (hereinafter referred DCP waste water), owing to wherein comprise the sulphide salt of high density, thereby have problems when adopting above-mentioned ordinary method to handle.
At first, contained sulphur can produce hydrogen sulfide in the DCP waste water in the anaerobic biological process, causes secondary pollution in the air and can evaporate at aerobic stage hydrogen sulfide.For example through after the anaerobic treatment, the concentration of hydrogen sulfide can reach 300mg/L to DCP waste water in the waste water, causes the secondary pollution to surrounding environment in up-flow anaerobic sludge blanket (UASB) reactor.
Secondly, when containing the inorganic salt of higher concentration in the waste water, the filler in the micro-electrolysis reactor can occur hardening phenomenon and influence treatment effect.
Therefore, press for a kind of method that can effectively handle DCP waste water and don't can cause secondary pollution.
Summary of the invention
In order to solve the problem of at least one aspect in the above-mentioned prior art, the utility model provides a kind of novel DCP method of wastewater treatment and treatment system, wherein adopts " facultative anaerobic biochemical " to handle alternative " anaerobic biological " of the prior art processing and has eliminated the hydrogen sulfide secondary pollution problem effectively.
Therefore, on the one hand, the utility model provides the method for handling DCP waste water, and it comprises the steps:
1) described DCP waste water being carried out the one-level facultative anaerobic biochemical handles;
2) the one-level aerobic biochemical being carried out in the water outlet of step 1) handles; With
3) randomly, to step 2) water outlet carry out catalytic oxidation treatment, ozonize or membrane bioreactor (MBR) and handle.
Preferably, first pH value with DCP waste water is adjusted to 11 ± 1 before carrying out step 1).
Preferably, in step 1), control redox potential (ORP) in the scope of-150mv to 50mv, preferably in the scope of-50mv to 50mv.
Preferably, in step 1), control dissolved oxygen (DO) concentration in the scope of 0.1-0.5mg/L.
Preferably, in step 1), control mixed liquor suspended solid, MLSS (MLSS) concentration in the scope of 3000-4000 mg/L.
Preferably, the ratio of control recirculation water and flooding quantity is 1.5:1 in step 1).
Preferably, in step 2) in control DO concentration in the scope of 2.0-5.0 mg/L.
Preferably, in step 2) in control MLSS concentration in the scope of 2000-3000 mg/L.
Preferably, in step 2) in the ratio of control returned sluge and flooding quantity be 1:1.
Preferably, in step 3) to step 2) water outlet carry out catalytic oxidation treatment.More preferably, described catalytic oxidation treatment adopts Fenton reagent method to carry out, comprise independent employing Fenton reagent method or with Fenton reagent method and other method coupling, for example light-Fenton reagent method, electricity-Fenton reagent method and coagulation-Fenton reagent method.Particularly preferably, described catalytic oxidation treatment adopts coagulation-Fenton method to carry out.
Preferably, the addition of ferrous sulfate is 3-6 liter/ton waste water in the Fenton of step 3) reagent method catalyzed oxidation, and the addition of hydrogen peroxide is 2-4 liter/ton waste water.
Preferably, in the Fenton of step 3) reagent method catalytic oxidation process the pH of waste water control in the scope of 2.5-3.5.
Preferably, step 3) adopts coagulation-Fenton method to carry out, and wherein the control of the dosage of coagulating agent is in the scope of 2-4 liter/ton waste water, and the pH of waste water controls the scope 7 ± 0.5 in the further preferred precipitation process of coagulation.
In preferred embodiment, the utility model method also comprises the steps: 4) to step 2) water outlet or exist the words of step 3) that secondary biochemical treatment is carried out in the water outlet of step 3).More preferably, this secondary biochemical treatment adopts bio membrane process to carry out, and further the preferred contact oxidation method that adopts is carried out, and preferably includes the processing of secondary facultative anaerobic biochemical and secondary aerobic biochemical especially and handles.
On the other hand, the utility model provides the system that handles DCP waste water, and it comprises:
DCP waste water is carried out the one-level oxygen compatibility pool that the one-level facultative anaerobic biochemical is handled;
The one-level facultative anaerobic biochemical is handled water outlet carry out the one-level Aerobic Pond that the one-level aerobic biochemical is handled;
Optional handles the catalyzed oxidation pond that catalytic oxidation treatment is carried out in water outlet to the one-level aerobic biochemical; With
The words that the one-level aerobic biochemical is handled water outlet or had the catalyzed oxidation pond are carried out the secondary biochemical pond of secondary biochemical treatment to the catalytic oxidation treatment water outlet.
Preferably, between catalyzed oxidation pond and secondary biochemical pond, also comprise the two-stage coagulation settling tank.
Preferably, between one-level Aerobic Pond and catalyzed oxidation pond, also comprise the one-level settling tank.
Further preferably, the one-level settling tank is also connected to the mud backflow pool, and this mud backflow pool is connected to the one-level Aerobic Pond, constitutes the mud reflux circuit.
Further preferably, link to each other by the air lift reflux between mud backflow pool and the one-level Aerobic Pond.
Preferably, between one-level settling tank and catalyzed oxidation pond, also comprise the one-level coagulative precipitation tank.
Preferably, the secondary biochemical pond comprises secondary oxygen compatibility pool and secondary Aerobic Pond.
Further preferably, after the secondary Aerobic Pond, also comprise second-level settling pond.
Preferably, the aerating system of the aerating system handled of one-level facultative anaerobic biochemical, aerating system that the one-level aerobic biochemical is handled and optional catalytic oxidation treatment is connected with same typhoon machine.
After method/system processing of the present utility model, the effluent quality of DCP waste water can reach the requirement of Shanghai City wastewater discharge standard " DB31/199-2009 ".And compared with prior art, the utility model method can also reach at least one following beneficial effect:
1, substitutes the secondary pollution that hydrogen sulfide has been avoided in the aerobic biochemical processing by adopting facultative anaerobic biochemical to handle;
2, can adopt secondary biochemical treatment to substitute little electrolysis treatment, thus the variety of problems of avoiding little electrolysis treatment to bring.
Description of drawings
Hereinafter will describe preferred implementation of the present utility model by reference to the accompanying drawings, wherein:
Fig. 1: the synoptic diagram of the DCP Waste Water Treatment of the utility model one preferred implementation, wherein dotted line represents that this catalyzed oxidation pond chooses wantonly, can select according to actual needs.
Fig. 2: the synoptic diagram of the DCP Waste Water Treatment of the utility model one particularly preferred embodiment.
Embodiment
In order to understand the technical solution of the utility model and beneficial effect better, hereinafter in conjunction with the accompanying drawings and embodiments preferred implementation of the present utility model is illustrated in greater detail.Should be appreciated that these explanations only for exemplary, are construed as limiting the utility model and should not be construed as by any way.
As mentioned above, in first aspect of the present utility model, provide the combined method of handling DCP waste water, it is characterized in that comprising one-level facultative anaerobic biochemical treatment step and one-level aerobic biochemical treatment step.
Randomly, the utility model method can also comprise after the one-level aerobic biochemical is handled carries out the step that catalytic oxidation treatment, ozonize or MBR handle to the aerobic treatment water outlet, preferably adopts the catalytic oxidation treatment step.
Preferably, if the utility model method after the one-level aerobic biochemical is handled or exist above-mentioned optional step after this optional step, also comprises the step of gained processing water outlet being carried out secondary biochemical treatment.
Referring to Fig. 1, in second aspect of the present utility model, provide the system that handles DCP waste water, it comprises:
DCP waste water is carried out the one-level oxygen compatibility pool that the one-level facultative anaerobic biochemical is handled;
The one-level facultative anaerobic biochemical is handled water outlet carry out the one-level Aerobic Pond that the one-level aerobic biochemical is handled;
Optional handles the catalyzed oxidation pond that catalytic oxidation treatment is carried out in water outlet to the one-level aerobic biochemical; With
The words that the one-level aerobic biochemical is handled water outlet or had the catalyzed oxidation pond are carried out the secondary biochemical pond of secondary biochemical treatment to the catalytic oxidation treatment water outlet.
Preferably, also comprise the one-level settling tank between one-level Aerobic Pond and catalyzed oxidation pond, more preferably the one-level settling tank is also connected to the mud backflow pool, is used for part mud is returned the one-level Aerobic Pond.
In some preferred implementation, one-level aerobic sludge reflux type is to use aeration wind to carry out air lift and refluxes, and has saved the use pneumatic diaphragm pump and has carried out the mud conveying.
In some preferred implementation, keep the processing of one-level facultative anaerobic biochemical, one-level aerobic biochemical to handle identical with the waste water liquid level with the catalytic oxidation treatment aerating system, can use like this a typhoon machine simultaneously as one-level hold concurrently oxygen, one-level is aerobic and the catalyzed oxidation air feed, saves sewage investment cost and power consumption.
In order to understand the utility model better, hereinafter will do more detailed the argumentation to the various processes that the utility model method relates to.
The one-level facultative anaerobic biochemical is handled
It mainly is to utilize the metabolism of aerobic-anaerobic microbe that the larger molecular organics in the waste water is converted into low-molecular-weight fatty acid that the one-level facultative anaerobic biochemical is handled, to realize hydrolysis and the acidifying of waste water, and then the biodegradability of raising waste water, the while can also be avoided the sulphide salt of waste water middle and high concentration to reduce in the biochemical treatment process and produce hydrogen sulfide.
Owing to contain sulphide salt and other organism of high density in the DCP waste water, therefore enter one-level hold concurrently oxygen handle before preferably with its pH value control 11 ± 1, to guarantee biochemical system steady running, the water outlet of control processing simultaneously pH is not less than 6.0.
In one-level facultative anaerobic biochemical treating processes, can control aeration rate by monitoring ORP, when improving hydrolysis and souring ability, to suppress the generation of hydrogen sulfide, preferably with the scope of ORP control at-150mv to 50mv.When ORP was lower than above-mentioned scope, treating processes was partial to anaerobism more, caused the hydrogen sulfide growing amount to increase; And when ORP was higher than above-mentioned scope, it is aerobic that treating processes is partial to more, causes hydrolysis and souring ability to descend.
In addition, in order to obtain best double oxygen treatment effect, especially preferably controlling DO concentration is 0.1-0.5mg/L, and MLSS concentration is 3000-4000 mg/L, recirculation water ratio 1.5:1.
The one-level aerobic biochemical is handled
The one-level aerobic biochemical is handled and mainly to be utilized the aerobic bacteria in the active sludge to finish organic degraded, with by in the oxidation removal waste water can biochemical organism.
In order to obtain best aerobic treatment effect, especially preferably controlling DO concentration is 2.0-5.0 mg/L, and MLSS concentration is 2000-3000 mg/L, and returned sluge compares 1:1.
Catalytic oxidation treatment
Residual organic comprises the material (sometimes even be mainly the material of bio-refractory) of bio-refractory in the waste water after the one-level aerobic biochemical is handled, and biodegradability is relatively poor (sometimes even reach BOD
5/ COD
Cr＜0.1).And can remove these bio-refractory materials in the waste water by the catalyzed oxidation step, make COD in the waste water
CrFurther degraded, improved the biodegradability of waste water simultaneously, be conducive to follow-up biochemical treatment; Catalytic oxidation treatment can also remove the biological look that produces in the biochemical treatment process on the other hand.
Preferably, adopt Fenton reagent to carry out above-mentioned catalytic oxidation treatment.For the ease of understanding, below Fenton reagent is done some concise and to the point introductions.
1. the principle of Fenton reagent
Fenton reagent is hydrogen peroxide and catalyst Fe
2+The common name of the oxidation system that constitutes.At Fe
2+H under the katalysis of ion
2O
2Decomposition activation energy lower (34.9 kJ/mol), can decompose and produce hydroxyl radical free radical OH, and OH is the efficiency factor of oxidation of organic compounds.
2. the influence factor of Fenton reagent
As mentioned above, OH is the organic efficiency factor of Fenton reagent oxidation, and [Fe
2+], [H
2O
2], [OH] etc. determined the output of OH, thereby determined the degree of Fenton reagent and organism reaction.Usually, the factor that influences the difficult degradation of Fenton agent treated, dysoxidizable organic waste water comprises pH value, H
2O
2Dosage and catalyst amounts etc.
2.1 pH value
Fenton reagent just can be had an effect under the condition of pH for acidity, in neutral and alkaline environment, and Fe
2+Can not catalysis H
2O
2Produce OH.According to the Fenton reagent react theory of classics, the pH value raises and has not only suppressed the generation of OH, and makes the Fe in the solution
2+Lose catalytic capability with the form precipitation of oxyhydroxide.When the pH value is low excessively, the H in the solution
+Excessive concentration, Fe
3+Can not successfully be reduced to Fe
2+, catalyzed reaction is obstructed.The variation that is the pH value directly has influence on Fe
2+, Fe
3+The complexation equilibrium system, thereby influence the oxidation capacity of Fenton reagent.
Therefore, in the utility model method, when the one-level outputted aerobic water enters catalyzed oxidation, preferably at first add the sulphur acid for adjusting pH value.Especially, the present inventor finds that by a large amount of tests for DCP method of wastewater treatment of the present utility model, pH value control Fenton reagent when the scope of 2.5-3.5 is best to organic degradation effect.
2.2 H
2O
2Dosage
Adopt validity and the economy of Fenton agent treated waste water to depend primarily on H
2O
2Dosage.Usually, along with H
2O
2The increase of consumption, organic matter degradation take the lead in increasing, and then occur descending.
The present inventor finds that by a large amount of tests for DCP method of wastewater treatment of the present utility model, hydrogen peroxide dosage control Fenton reagent when the scope of 2-4 liter/ton waste water is best to organic degradation effect.
2.3 catalyst amounts
FeSO
47H
2O is catalysis H
2O
2Decompose and generate the most frequently used catalyzer of hydroxyl radical free radical OH.With H
2O
2Identical, generally speaking, along with Fe
2+The increase of consumption, the removal of waste water COD take the lead in increasing, and be then on a declining curve.Its reason is: at Fe
2+When concentration is low, Fe
2+Concentration increase unit vol H
2O
2The OH that produces increases, and the OH that produces has all participated in and organic reaction; Work as Fe
2+Excessive concentration the time, section H
2O
2Invalid decomposition takes place, and discharges O
2
The present inventor finds that by a large amount of tests for DCP method of wastewater treatment of the present utility model, ferrous sulfate dosage control Fenton reagent when the scope of 3-6 liter/ton waste water is best to organic degradation effect.
3. the coupling of Fenton reagent and other method
In the utility model method, Fenton reagent method both can be used separately, also can with other method coupling.Preferably, for further improving removal effect of organic matter, based on standard Fenton reagent, by changing and the coupling reaction condition, improve reaction mechanism, obtained the similar Fenton-like reagent method of a series of mechanism, as light-Fenton reagent method, electricity-Fenton reagent method and coagulation-Fenton reagent method etc.
3.1 light-Fenton method
3.1.1 UV-Fenton method
When optical radiation (as UV-light, visible light), Fenton reagent oxidation performance has greatly improved.The UV-Fenton method also makes light help the Fenton method, is common Fenton system and UV-H
2O
2System compound compared with independent these two kinds of systems, and its advantage is to have reduced Fe
2+Consumption has improved H
2O
2Utilization ratio.This is because Fe
3+With ultraviolet ray to H
2O
2Catalytic decomposition have synergistic effect.The subject matter that this method exists is that solar energy utilization ratio is still not high, and energy consumption is bigger, and the treatment facility expense is higher.
3.1.2 UV-vis ironic oxalate complex compound H
2O
2Method
When organic substrate concentration is high, Fe
3+The light quantity subnumber that complex compound absorbs seldom and needs long irradiation time, H
2O
2Dosage also increase thereupon, OH is easily by the H of high density
2O
2Remove.Thereby, the organic waste water of lower concentration during the UV-Fenton method generally only is suitable for handling.(as contain Fe when in the UV-Fenton system, introducing the higher material of photochemical activity
3+Oxalate and Citrate trianion complex compound) time, can effectively improve ultraviolet ray and visible light utilized effect.
3.2 electricity-Fenton method
Light-Fenton method has improved organic mineralization degree than common Fenton method, but still has the incomplete shortcoming of the low and automatic H2O2 of the generation mechanism of photo-quantum efficiency.So-called mineralising refers to organic pollutant is converted into mineral substance, such as water, carbonic acid gas and inorganic salt etc.It is to utilize additive and promotor etc. that mineralising is handled the organic waste water technology, produce certain energy and destroy the chemical bond of contaminant molecule, make the contaminant molecule fracture, from large to small, finally the carbon in the contaminant molecule is converted into carbonic acid gas, pollutents such as nitrogen and phosphorus are converted into inorganic salt, organic substance in the waste water is degraded fully, thereby removal of pollutants reduces COD in industrial wastewater and ammonia nitrogen value, and finally increasing water quality reaches emission request.
The H that electricity-Fenton method utilizes electrochemical process to produce
2O
2And Fe
2+As the lasting source of Fenton reagent, compare and have the following advantages with light-Fenton method: the one, produce H automatically
2O
2Mechanism more perfect; The 2nd, cause the factor of organic matter degradation more (outside the oxygenizement of hydroxyl-removal free radical, also having anodic oxidation, electro-adsorption etc.).Because H
2O
2Cost far above Fe
2+So, will produce H automatically by electrochemical process
2O
2Mechanism introduce the Fenton system and have very big practical application meaning.
3.3 coagulation-Fenton method
The oxidation coupling reaction also can take place in that oxidative degradation is organic in Fenton reagent simultaneously, and the macromole after the coupling is removed by Coagulation Method, obtains coagulation-Fenton method thus.Coagulation Method is effective to hydrophobic contaminant, and Fenton reagent oxidation method is good to the treatment effect of water-soluble substances, and the Fenton of low dosage reaction can reduce organic water-soluble, help coagulation, thereby coagulation-Fenton method can obtain good treatment effect when handling waste water difficult for biological degradation.
The present inventor contrasts by using different Fenton reagent methods to experimentize, and finds coagulation-Fenton method to pollutant removal the best of DCP waste water, and performance is remarkable especially when particularly handling the water outlet of one-level aerobic biochemical.
Preferably, in the used coagulation of the utility model-Fenton method, be coagulating agent with liquid caustic soda (being sodium hydroxide) and polyacrylamide (PAM).Alternatively, can also adopt as alternative liquid caustic soda such as ferrous sulfate, iron(ic) chloride, Tai-Ace S 150 and calcium hydroxides.
In addition, the present inventor finds that by a large amount of tests for DCP method of wastewater treatment of the present utility model, the control of the dosage of coagulating agent is best to removal effect of organic matter when the scope of 2-4 liter/ton waste water.Especially, the pH that preferably controls coagulative precipitation tank is beneficial to coagulation in 7 ± 0.5 scope.
In an embodiment, coagulation of the present utility model-Fenton method is carried out in the following way: when the one-level outputted aerobic water enters catalyzed oxidation, add sulfuric acid earlier and regulate pH, add hydrogen peroxide and ferrous sulfate then simultaneously, behind aerated reaction, add liquid caustic soda and regulate pH, add polyacrylamide and ferrous sulfate again, reach 15-25% through measuring waste water COD clearance after catalytic oxidation treatment.
In addition, the contriver use ozone and MBR substitute respectively Fenton reagent to DCP wastewater treatment test, find guaranteeing to handle under the water outlet prerequisite up to standard, use ozone and MBR can substitute Fenton reagent DCP waste water handled.But, consider that the process cost of ozonize is high, and the facility investment that MBR handles is too high, thereby preferably adopts Fenton reagent catalytic oxidation treatment step.
Secondary biochemical treatment
After the processing of one-level aerobic biochemical and/or catalytic oxidation treatment step, COD in the DCP waste water is up to standard substantially, this moment if desired, can also adopt methods such as flocculation or secondary biochemical treatment further to reduce the concentration of suspended substance (SS), for the consideration that reduces the chemical reagent consumption, preferably adopt secondary biochemical treatment.
Secondary biochemical treatment can also further be removed remaining organic compound in the waste water when reducing SS concentration, make and handle the stable water outlet qualified discharge.Preferably, secondary biochemical treatment adopts bio membrane process to carry out, and more preferably adopts contact oxidation method to carry out, and preferably includes the processing of secondary facultative anaerobic biochemical and secondary aerobic biochemical especially and handles.
Embodiment
Followingly with reference to the drawings and specific embodiments the utility model is done more specifically to describe, be to be understood that this embodiment only for illustrative, does not constitute any type of restriction to the utility model.
General step
Referring to Fig. 2, the DCP factory effluent can be divided into two strands: density wastewater during and rare waste water after shunting through removing contamination.Density wastewater during and rare waste water carry out water quality and quantity at first respectively to be regulated, and then carries out preposition catalytic oxidation treatment earlier for high density production accident waste water, carries out the one-level biochemical treatment then jointly, by organism in the microbial process degrading waste water.Then as required, can select waste water is carried out catalytic oxidation treatment, can realize that by catalytic oxidation treatment organic degraded improves waste water quality simultaneously in the waste water, improve the wastewater biodegradability energy.At last, waste water enters the secondary biochemical treatment system, realizes the final degraded of organism and water conditioning in the waste water.Wherein, the activated sludge process of " oxygen of holding concurrently+aerobic " is mainly adopted in the one-level biochemical treatment; Catalyzed oxidation adopts with the catalyzed oxidation technology of Fenton reagent as oxygenant; Secondary biochemical adopts bio membrane process (catalytic oxidation).Waste water water quality after treatment reaches the extra large pipe network of the row of including in behind the Shanghai City wastewater discharge standard " DB31/199-2009 ".
After the secondary biochemical treatment, materialized mud and biochemical sludge can be collected to mud-collecting well by independent pipeline, be promoted to materialized mud concentration basin and biochemical sludge concentration basin by the mud lift pump then, adopt plate-and-frame filter press to carry out processed through dosing conditioning back, dewatered sludge is by there being the qualification unit of processing to dispose.
Embodiment 1
Liquid level according to rare wastewater equalization pond rises to oxygen compatibility pool with lift pump with the waste water equilibrium, water inlet pH control is 11 ± 1, unlatching reflux pump control recirculation water ratio 1.5:1, Fan Regulation tolerance make and are in double oxygen condition in the oxygen compatibility pool, control DO concentration: 0.1-0.5mg/L, MLSS concentration: 3000-4000 mg/L, ORP:-50-+50mv.Set up precipitation zone at the waste water one-level oxygen up-flow of holding concurrently to outlet, microorganism is run off in the oxygen water outlet of reduce holding concurrently.
The oxygen compatibility pool water outlet enters the one-level Aerobic Pond subsequently, utilizes the aerobic bacteria in the active sludge to finish organic degraded.Regulate the DO concentration in the tolerance control one-level Aerobic Pond: 2.0-5.0 mg/L, MLSS concentration: 2000-3000 mg/L.Independent settling tank and mud return-flow system are set behind the one-level Aerobic Pond, can reduce SS concentration to improve the efficient of subsequent disposal in the settling tank precipitation.Open the air door of mud backflow pool, the mud air lift is back to one-level Aerobic Pond control returned sluge compares 1:1.
Directly enter the secondary biochemical pond without catalytic oxidation treatment behind one-level Aerobic Pond water outlet process one-level settling tank and the one-level coagulative precipitation tank, the secondary biochemical pond adopts contact oxidation method to handle, and further comprises secondary oxygen compatibility pool and secondary Aerobic Pond.Second-level settling pond is set behind the secondary Aerobic Pond secondary outputted aerobic water is carried out mud-water separation, the second-level settling pond water outlet namely reaches the Shanghai City secondary discharge standard.
The COD data of DCP factory effluent are recorded in the table 1 after the various processes.
Table 1 DCP production wastewater treatment effect table
Abovely with reference to drawings and Examples preferred implementation of the present utility model has been made specific descriptions, yet these are described only for illustrative and nonrestrictive.Those skilled in the art are under the prerequisite that does not depart from the utility model marrow and scope; can make various apparent changes and modification to these preferred implementations, these changes or amended embodiment still drop in the protection domain of the present utility model.
Claims (9)
1. handle the system of DCP waste water, it is characterized in that described system comprises:
DCP waste water is carried out the one-level oxygen compatibility pool that the one-level facultative anaerobic biochemical is handled;
The one-level facultative anaerobic biochemical is handled water outlet carry out the one-level Aerobic Pond that the one-level aerobic biochemical is handled;
Optional handles the catalyzed oxidation pond that catalytic oxidation treatment is carried out in water outlet to the one-level aerobic biochemical; With
The words that the one-level aerobic biochemical is handled water outlet or had the catalyzed oxidation pond are carried out the secondary biochemical pond of secondary biochemical treatment to the catalytic oxidation treatment water outlet.
2. according to the system of claim 1, it is characterized in that between catalyzed oxidation pond and secondary biochemical pond, also comprising the two-stage coagulation settling tank.
3. according to the system of claim 1 or 2, it is characterized in that between one-level Aerobic Pond and catalyzed oxidation pond, also comprising the one-level settling tank.
4. according to the system of claim 3, it is characterized in that the one-level settling tank is also connected to the mud backflow pool, this mud backflow pool is connected to the one-level Aerobic Pond, constitutes the mud reflux circuit.
5. according to the system of claim 4, it is characterized in that linking to each other by the air lift reflux between mud backflow pool and the one-level Aerobic Pond.
6. according to the system of claim 5, it is characterized in that between one-level settling tank and catalyzed oxidation pond, also comprising the one-level coagulative precipitation tank.
7. according to each system among the claim 1-2, it is characterized in that the secondary biochemical pond comprises secondary oxygen compatibility pool and secondary Aerobic Pond.
8. according to the system of claim 7, it is characterized in that after the secondary Aerobic Pond, also comprising second-level settling pond.
9. according to each system among the claim 1-2, it is characterized in that the aerating system of aerating system that the one-level facultative anaerobic biochemical handles, aerating system that the one-level aerobic biochemical is handled and optional catalytic oxidation treatment is connected with same typhoon machine.
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|---|---|---|---|---|
| CN103787544A (en) * | 2012-11-02 | 2014-05-14 | 中国石油化工集团公司 | System for treating DCP waste water |
| CN108128977A (en) * | 2018-03-21 | 2018-06-08 | 许飞扬 | A kind of chemical wastewater treatment system |
-
2012
- 2012-11-02 CN CN2012205732040U patent/CN203187488U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103787544A (en) * | 2012-11-02 | 2014-05-14 | 中国石油化工集团公司 | System for treating DCP waste water |
| CN103787544B (en) * | 2012-11-02 | 2016-10-05 | 中国石油化工集团公司 | Process the system of DCP waste water |
| CN108128977A (en) * | 2018-03-21 | 2018-06-08 | 许飞扬 | A kind of chemical wastewater treatment system |
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