CN212293233U - Low-concentration degradation-resistant chemical wastewater treatment system - Google Patents
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Abstract
The utility model relates to the effluent disposal system field, concretely relates to low concentration difficult degradation chemical industry effluent disposal system. The system comprises a collecting and adjusting section, a multiphase catalytic oxidation section, a biological adsorption oxidation separation section and a magnetic coagulation sedimentation zone, wherein the content of active carbon in an adjusting tank of the collecting and adjusting section is 10-90 mg/L wastewater, the content of magnetic iron powder is 1-30 mg/L wastewater, the adding amount of hydrogen peroxide in the multiphase catalytic oxidation section is 1-50mg/mg COD, and the adding amount of ozone is 0.1-10 mg/mg COD. The utility model discloses a low concentration difficult degradation chemical industry effluent disposal system is the biochemical joint treatment of materialization, and active carbon/magnetism iron powder runs through in entire system flow, realizes that the overall process adsorbs the little electrolysis environment, strengthens the treatment effect, and the equalizing basin that catchments is thrown and is thrown the limited pollutant enrichment of active carbon/magnetism iron powder, is favorable to the subsequent stage to be handled.
Description
Technical Field
The utility model relates to the effluent disposal system field, concretely relates to low concentration difficult degradation chemical industry effluent disposal system.
Background
A large amount of chemical wastewater generated in the chemical production process contains more chemical raw materials, products and byproducts, and most of the chemical wastewater has a complex structure, is toxic and harmful and is difficult to biodegrade. The complexity and diversity of chemical wastewater pollution are caused, pretreatment and biochemical combined treatment are adopted for treatment currently, and pretreatment measures comprise flocculation precipitation, air flotation, air stripping, adsorption, catalytic oxidation and the like; biochemical methods include SBR, contact oxidation, AAO, and the like. Most of the current treatment processes have the following problems: 1) the series treatment process only combines physicochemical and biochemical machinery, does not exert the comprehensive treatment effect of a treatment system, such as electric coagulation sedimentation-anaerobic-aerobic, resin adsorption-anaerobic-aerobic, ozone-biological activated carbon-aerobic, photocatalytic oxidation-microelectrolysis-SBR and the like; 2) the problems of blockage, sludge expansion, sludge loss and long system starting period exist in the prior art; 3) the treatment effect of the prior art is difficult to reach the primary standard of the integrated wastewater discharge standard (GB 8978 & 1996).
SUMMERY OF THE UTILITY MODEL
To the characteristics and not enough that above-mentioned prior art exists, combine the characteristic of difficult degradation low concentration organic waste water, the utility model provides a low concentration difficult degradation chemical industry waste water treatment side system.
According to the utility model discloses a low concentration difficult degradation chemical industry effluent disposal system, the system includes:
a collection and regulation section, a heterogeneous catalytic oxidation section, a biological adsorption and oxidation separation section and a magnetic coagulation and precipitation zone,
an activated carbon powder adding device and a magnetic iron powder adding device are arranged at the water inlet end of the collecting and adjusting section, the activated carbon powder and the magnetic iron powder are added into an adjusting tank of the collecting and adjusting section, and the wastewater is lifted by a lifting pump to enter the collecting and adjusting section, wherein the content of the activated carbon in the adjusting tank is 10-90 mg/L of the wastewater, and the content of the magnetic iron powder is 1-30 mg/L of the wastewater;
the collecting and adjusting section is connected with the multiphase catalytic oxidation section through a lifting pump and a pipeline, a pipeline mixer is arranged between the lifting pump and the multiphase catalytic oxidation section, the pipeline mixer is communicated with a hydrogen peroxide adding device, the hydrogen peroxide is mixed with wastewater and enters the multiphase catalytic oxidation reaction section, and ozone generated by an ozone generating device is exposed into the multiphase catalytic oxidation reaction section from the bottom, wherein the adding amount of the hydrogen peroxide is 1-50mg/mg COD, and the adding amount of the ozone is 0.1-10 mg/mg COD;
the water outlet end of the heterogeneous catalytic oxidation is communicated with a biological adsorption and oxidation separation section, and the biological adsorption and oxidation separation section is divided into a biological contact oxidation unit and a mud-water separation unit;
the water outlet end of the biological adsorption oxidation separation section is communicated with the magnetic coagulation sedimentation section.
According to the utility model discloses a low concentration difficult degradation chemical industry effluent disposal system, wherein, the collection equalizing basin internally mounted who collects the regulation section has the dive agitator.
According to the utility model discloses a low concentration difficult degradation chemical industry effluent disposal system, wherein, heterogeneous catalytic oxidation section is provided with heterogeneous catalytic oxidation jar.
According to the utility model discloses a low concentration difficult degradation chemical industry effluent disposal system, wherein, hydrogen peroxide solution and waste water mix, get into from the water distribution device of multi-phase catalytic oxidation reaction tank bottom.
According to the utility model discloses a low concentration difficult degradation chemical industry effluent disposal system, wherein, magnetism coagulating sedimentation section divide into flocculation area, coagulation area and settling zone.
According to the utility model discloses a low concentration difficult degradation chemical industry effluent disposal system, wherein, the bottom of settling zone is equipped with the sludge impoundment, the sludge impoundment passes through the pipeline and is connected with high shear machine, high shear machine passes through the pipeline and is connected with the magnetic separation machine.
According to the utility model discloses a low concentration difficult degradation chemical industry effluent disposal system, wherein, the play water of magnetic separation machine and the magnetic iron powder of separation flow back to collecting the regulation section through the magnetic powder backwash pump, and surplus sludge discharges through the sludge recirculation water pump and handles.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. according to the utility model discloses a low concentration difficult degradation chemical industry effluent disposal system is the biochemical joint treatment of materialization, and active carbon/magnetism iron powder runs through in entire system flow, realizes that the overall process adsorbs the little electrolysis environment, strengthens the treatment effect, and the equalizing basin that catchments is thrown and is thrown the limited pollutant enrichment of active carbon/magnetism iron powder, is favorable to the subsequent stage to be handled.
2. In the heterogeneous catalytic oxidation stage, the activated carbon powder and the magnetic iron powder are used as catalysts, and the ozone/hydrogen peroxide solution is subjected to coupling treatment, so that the problem of blockage caused by long-term operation of the iron-carbon as the catalyst is solved, the problem of insufficient catalytic contact of particles is avoided, the catalytic effect of the ozone/hydrogen peroxide solution is improved, the oxidation effects of the hydrogen peroxide solution and the ozone are mutually promoted, the catalytic oxidation effect is greatly improved, the biotoxicity of wastewater is reduced, and the subsequent biochemical treatment effect is improved.
3. The activated carbon powder/magnetic iron powder provides a huge specific surface area for the growth of microorganisms, improves the sedimentation rate of flocculent sludge, reduces the sludge loss and the process floor area, and ensures the biochemical treatment effect.
4. By adopting the treatment process, the low-concentration degradation-resistant chemical wastewater can be effectively treated, and the treated effluent reaches the primary standard of Integrated wastewater discharge Standard (GB 8978 + 1996).
Drawings
FIG. 1 is a structural diagram of a low-concentration degradation-resistant chemical wastewater treatment system of the utility model.
Reference numerals
1: an activated carbon powder feeding device; 2: a magnetic iron powder feeding device; 3: a submersible mixer; 4: a lift pump; 5: a hydrogen peroxide feeding device; 6: a pipeline mixer; 7: a heterogeneous catalytic oxidation reaction tank; 8: an ozone generator; 9: a biological contact oxidation unit; 10: a mud-water separation unit; 11: a coagulation adding device; 12: a flocculating agent adding device; 13: a coagulation reaction zone; 14: a flocculation reaction zone; 15: a settling zone; 16: a high shear machine; 17: a magnetic separator; 18: a sludge return water pump; 19: magnetic powder reflux pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the practical application, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the scope of the present invention.
As shown in figure 1, the utility model discloses a low concentration difficult degradation chemical industry effluent disposal system includes:
the waste water is lifted by a lifting pump 4 and enters the section, an activated carbon powder dry powder adding device 1 and a magnetic iron powder dry powder adding device 2 are matched, the activated carbon powder adding device 1 and the magnetic iron powder dry powder adding device 2 are arranged at the water inlet end of the collection and adjustment section, and a submersible stirrer 3 is arranged inside the collection and adjustment tank to fully mix the waste water with the activated carbon powder and the magnetic iron powder. The collecting and adjusting section is connected with the multiphase catalytic oxidation reaction tank 7 through a lifting pump 4 and a pipeline, a pipeline mixer 6 is arranged between the lifting pump and the multiphase catalytic oxidation reaction tank 7, hydrogen peroxide is added into the pipeline mixer 6 through a hydrogen peroxide adding device 5 and is mixed with wastewater to enter from a water distribution device at the bottom of the multiphase catalytic oxidation reaction tank 7, and meanwhile, an ozone generator 8 generates ozone which is blown into the multiphase catalytic oxidation reaction tank 7 through an aeration device at the bottom of the multiphase catalytic oxidation reaction tank to be in contact reaction with the wastewater. The effluent of the heterogeneous catalytic oxidation reaction tank 7 automatically flows into a biological adsorption oxidation separation section. The biological adsorption oxidation separation section is divided into a biological contact oxidation unit 9 and a mud-water separation unit 10. The bottom of the biological contact oxidation part is provided with an aeration device, the aeration of a blower is used for maintaining the growth of microorganisms and fully mixing the microorganisms, the activated carbon powder, the magnetic iron powder and the wastewater, the upper end of the mud-water separation part is provided with an inclined plate filler for carrying out mud-water separation, the bottom of the mud-water separation part is provided with a sludge reflux pump, the effluent of the biological adsorption oxidation separation section automatically flows into the magnetic coagulation sedimentation section, the section is divided into a flocculation area 12, a coagulation area 13 and a sedimentation area 15, a flocculating agent is added into the flocculation area 12 through a flocculating agent adding device 12, a coagulating agent is added into the coagulation area 13 through a coagulating agent adding device 11, sludge is sunk into a bottom sludge tank in the settling zone 15, the sludge tank is connected with a high-shear machine 16 through a pipeline, the high-shear machine is connected with a magnetic separator 17 through a pipeline, water discharged from the magnetic separator 17 and separated magnetic iron powder flow back to a collecting and adjusting section through a magnetic powder return pump 19, and residual sludge is discharged and treated through a sludge return water pump 18.
The process of utilizing the system of this application to handle low concentration difficult degradation chemical industry waste water is as follows:
1) collecting and adjusting waste water;
2) heterogeneous catalytic oxidation, namely decomposing non-degradable macromolecules in the wastewater into micromolecular organic matters which are easily degraded by microorganisms through ozone, hydrogen peroxide, activated carbon powder and magnetic iron powder heterogeneous coupling catalytic oxidation, greatly improving the biodegradability of the wastewater and increasing the pollutant removal effect of a subsequent treatment unit;
3) the effluent of heterogeneous catalytic oxidation automatically flows into a biological adsorption oxidation separation tank;
4) supernatant fluid automatically flows into a magnetic coagulation sedimentation tank, PAC and PAM are respectively added into a flocculation area and a coagulation area, sedimentation is deposited into a sludge tank, and magnetic iron powder is recovered by a high shear and a magnetic separator and flows back to an adjusting tank for recycling;
5) and discharging the supernatant of the magnetic coagulation sedimentation tank to a discharge port after reaching the standard.
In the wastewater collection and regulation section, the proportion of activated carbon powder and magnetic iron powder in a collection and regulation tank is 10-90 mg/L wastewater, the adding proportion of magnetic iron powder is 1-30 mg/L wastewater, the adding proportion of activated carbon powder and magnetic iron powder is 3-10: 1, materials are uniformly mixed and fully contacted in the tank in a stirring or aeration mode, part of pollutants are adsorbed by the activated carbon powder and the magnetic iron powder, and the magnetic iron powder and the activated carbon powder form a micro-electrolysis environment, so that a pretreatment effect is achieved on pollutants in the wastewater.
When the adding amount of the activated carbon powder is less than 10mg/L of wastewater and the adding amount of the magnetic iron powder is less than 1mg/L, the activated carbon and the magnetic iron powder have low densities, cannot form a micro-electrolysis state, only exert the self-adsorption effect, have low catalytic effect on ozone and hydrogen peroxide when entering a heterogeneous catalytic oxidation section, cannot generate more hydroxyl radicals, and have an unobvious treatment effect.
When the adding amount of the activated carbon powder is more than 90mg/L of wastewater and the adding amount of the magnetic iron powder is more than 30mg/L, the densities of the activated carbon and the magnetic iron powder are too high. When the particulate matters in the solution are high, abrasion of a lift pump, a pipeline and the like is serious, and the failure rate of equipment is obviously improved; and competitive adsorption is formed between the activated carbon powder and the magnetic iron powder, so that the treatment efficiency is lowered; when high-concentration activated carbon powder and magnetic iron powder enter the biological adsorption oxidation separation tank, sludge is easy to gather to form large floating mud, and the quality of effluent water is poor.
The water inlet of the heterogeneous catalytic oxidation section is a mixture of activated carbon powder, iron powder and waste liquid in a collecting and regulating tank which is pumped by a lift pump, the step is carried out in a reaction tank made of 316L, the water inlet and outlet modes are water inlet from the bottom and water outlet from the top, and the phenomenon that the reaction is insufficient due to the fact that ozone is brought out by the Venturi effect caused by the water outlet from the bottom is avoided. Adding hydrogen peroxide into the water inlet pipeline at the stage through a pipeline mixer, wherein the adding amount is 1-50mg/mg COD, adding ozone into the bottom of the reaction tank through a titanium alloy aeration disc, the adding amount of the ozone is 0.1-10 mg/mg COD, and the adding ratio of the ozone to the hydrogen peroxide is 1: 10-30. The liquid in the reaction tank, the activated carbon powder and the magnetic iron powder are fully mixed and contacted under the stirring of ozone gas, meanwhile, the activated carbon powder and the magnetic iron powder provide huge specific surface area for catalytic oxidation, hydrogen peroxide generates hydroxyl radicals and hydroxyl radicals under the catalytic action of the iron powder, the hydroxyl radicals and ozone generate more hydroxyl radicals under the catalytic action of the magnetic iron powder, and organic matters adsorbed on the surfaces of the activated carbon powder and the magnetic iron powder and dissociated in the solution are oxidized and decomposed into micromolecular substances. The gas phase, the liquid phase and the solid phase are fully mixed and mutually promoted, the treatment effect is greatly improved, the biotoxicity of pollutants in the wastewater is reduced, and meanwhile, the problems of long-time blockage of conventional ozone and iron carbon and insufficient contact of ozone and a catalyst are solved.
When the dosage of hydrogen peroxide in the heterogeneous catalytic oxidation section is less than 1mg/mg COD and the dosage of ozone is less than 0.1mg/mg COD in wastewater, the dosage of the oxidant is too low to completely oxidize macromolecular refractory organic matters adsorbed by the activated carbon powder and the magnetic iron powder, and the unoxidized refractory macromolecular organic matters enter a subsequent treatment unit along with the activated carbon powder and the magnetic iron powder, so that the quality of effluent is finally deteriorated.
When the adding amount of hydrogen peroxide is more than 50mg/mg COD and the adding amount of ozone is more than 10mg/mg COD, the adding amount of the oxidant is too high, so that the subsequent biological adsorption separation tank is not provided with enough substances for the growth of microorganisms in the inlet water; and excessive ozone and hydrogen peroxide can enter the biological adsorption separation tank along with water flow, and the strong oxidizing property of the ozone and the hydrogen peroxide kills micro-organisms growing in the section, so that the tank loses the original purification effect.
The heterogeneous catalytic oxidation section is mainly characterized in that hydroxyl radicals generated by the reaction of ozone and hydrogen peroxide are used for damaging difficultly-degraded macromolecular organic matters, the activated carbon powder and the magnetic iron powder are respectively used as catalysts of the ozone and the hydrogen peroxide, when the activated carbon and the magnetic iron powder in a reactor in the heterogeneous catalytic oxidation section reach certain concentration (the activated carbon is more than 10mg/L, and the magnetic iron powder is more than 1mg/L), the ozone and the hydrogen peroxide can fully react under the catalytic action of the activated carbon powder and the magnetic iron powder.
The water inlet of the biological adsorption oxidation separation tank is the gravity inflow of mixed liquid in the heterogeneous catalytic oxidation section, and the activated carbon powder and the magnetic powder in the mixed liquid are used as carriers for the growth of microorganisms to form inorganic nuclear biological flocs, so that the settling property and the mud-water separation effect of the sludge are improved, and the sludge loss is reduced. The microbial flocs growing on the surfaces of the activated carbon powder and the magnetic iron powder grow by taking micromolecule organic matters adsorbed on the surfaces of the activated carbon powder and the magnetic iron powder and treated by a heterogeneous catalytic oxidation section as nutrient substances. Meanwhile, pollutants in the wastewater are continuously decomposed by a micro-electrolysis environment formed by the iron powder and the carbon powder. The tail end of the biological adsorption and oxidation separation tank is a settling zone for carrying out mud-water separation, a reflux pump is arranged at the bottom of the settling zone, separated inorganic nuclear biological flocs are refluxed to the front end of the biological adsorption and oxidation separation tank, and part of inorganic nuclear sludge is separated by a high shear and a magnetic separator and is refluxed to a water collection regulation tank. The sedimentation velocity of the biological flocs taking the activated carbon powder and the magnetic iron powder as the cores is 5-10 times that of common activated sludge, and the process floor area is greatly reduced. And part of the unused activated carbon powder and magnetic powder enters the next treatment stage along with the supernatant.
The water inlet of the magnetic coagulation sedimentation tank is the gravity inflow of supernatant mixed liquor of the biological adsorption oxidation separation section, and the activated carbon powder and the magnetic iron powder in the mixed liquor continuously adsorb and degrade residual trace pollutants in the wastewater through micro-electrolysis. The activated carbon powder and the magnetic iron powder are used as crystal nuclei to enhance the flocculation and precipitation effect and reduce the volume of the flocculation and precipitation tank. And separating magnetic iron powder from biological sludge by the sludge deposited in the sludge collection tank of the flocculation sedimentation tank through a high shear and a magnetic separator, and refluxing to the water collection regulating tank for recycling. And finally discharging the supernatant after reaching the standard through a discharge water tank.
Example 1
The water quantity of the wastewater produced by a certain chemical enterprise in Hebei is 60m3The method comprises the following steps of (1) treating main pollutants serving as production raw materials and reaction intermediates, specifically benzene ring substances, by adopting the following process:
the process 1 comprises the following steps: process utilizing the system of the utility model ('water collection adjustment + heterogeneous catalytic oxidation + bio-adsorption oxidation separation + magnetic coagulation sedimentation')
And (2) a process: catchment adjustment, ozone catalytic oxidation, SBR and coagulating sedimentation
And (3) a process: catchment adjustment + Fenton + AAO + coagulating sedimentation
The effects of the treatment process are shown in Table 1 below
According to the experimental operation results, when the COD of the inlet water is 1500mg/L, the BOD is 200mg/L, the ammonia nitrogen is 50mg/L and the TP is 5mg/L, the COD of the outlet water can reach less than or equal to 300mg/L, the BOD is less than or equal to 70mg/L, the ammonia nitrogen is less than or equal to 20mg/L, the TP is less than or equal to 0.5mg/L, and the removal rates respectively reach 80%, 65%, 60% and 90%. The effect is slightly improved by adopting the process 3. The best effect is achieved by adopting the process 1, the effluent quality reaches the primary standard of Integrated wastewater discharge Standard (GB 8978 & 1996), the COD of the effluent is less than or equal to 90mg/L, the BOD is less than or equal to 30mg/L, the ammonia nitrogen is less than or equal to 10mg/L, the TP is less than or equal to 0.3mg/L, the removal rates respectively reach 94%, 85%, 80% and 94%, and are improved by 17.5%, 30.76%, 33.33% and 4.4% compared with the process 2.
Example 2
Certain of Gansu provinceThe production wastewater of industrial and enterprise has the water quantity of 150m3The utility model discloses a process for the synthesis of organic polymer, adopt the utility model discloses technology ('catchment regulation + heterogeneous catalytic oxidation + bio-adsorption oxidation separation + magnetic coagulation sedimentation') handles, intake COD 800mg/L, BOD 100mg/L, ammonia nitrogen 20mg/L, TP3mg/L, activated carbon powder input 15mg/L, magnetic iron powder input 3mg/L, ozone input 1mg/mg COD, 30% concentration hydrogen peroxide input 20mg/mg COD, regulation pond dwell time 12 hours, heterogeneous catalytic oxidation dwell time 2 hours, bio-adsorption oxidation separation pond dwell time 24 hours, magnetic coagulation sedimentation pond dwell time 30min, final effluent is less than 40mg/L, BOD is less than 10mg/L, the ammonia nitrogen is less than 3mg/L, and the TP is less than 0.2 mg/L.
Example 3
The water quantity of the industrial wastewater of certain chemical enterprises in Shandong is 100m3And h, the main pollutants are production raw materials and reaction intermediates, in particular polycyclic aromatic hydrocarbon organic matters. Get some water samples, adopt the utility model discloses technology ('catchment regulation + heterogeneous catalytic oxidation + bioadsorption oxidation separation + magnetic coagulation sedimentation') is handled, explores different active carbon powder, magnetism iron powder, ozone, hydrogen peroxide solution and puts in the influence of volume to its treatment effect:
condition 1: adding amount of activated carbon powder: 20mg/L, adding amount of magnetic iron powder: 5mg/L, 2mg/mg COD of ozone dosage and 5mg/mg COD of 30% concentration hydrogen peroxide dosage.
Condition 2: adding amount of activated carbon powder: 5mg/L, adding amount of magnetic iron powder: 5mg/L, 2mg/mgCOD of ozone dosage and 5mg/mg COD of 30% concentration hydrogen peroxide dosage.
Condition 3: adding amount of activated carbon powder: 20mg/L, adding amount of magnetic iron powder: 0.5mg/L, 2mg/mg COD of ozone dosage and 5mg/mg COD of 30% concentration hydrogen peroxide dosage.
Condition 4: adding amount of activated carbon powder: 20mg/L, adding amount of magnetic iron powder: 5mg/L, 0.05mg/mg COD of ozone dosage and 5mg/mg COD of 30% concentration hydrogen peroxide solution dosage.
Condition 5: adding amount of activated carbon powder: 20mg/L, adding amount of magnetic iron powder: 5mg/L, 2mg/mgCOD of ozone dosage and 0.5mg/mg COD of 30% concentration hydrogen peroxide solution dosage.
Condition 6: adding amount of activated carbon powder: 100mg/L, adding amount of magnetic iron powder: 50g/L, 2mg/mgCOD of ozone dosage and 5mg/mg COD of 30% concentration hydrogen peroxide dosage.
Condition 7: adding amount of activated carbon powder: 20mg/L, adding amount of magnetic iron powder: 5mg/L, 15mg/mg COD of ozone dosage and 5mg/mg COD of 30% concentration hydrogen peroxide dosage.
The effect of the treatment process is shown in table 2 below.
TABLE 2
Example 4
1500mL of industrial wastewater is taken to prepare a small multiphase catalytic oxidation reactor with the diameter of 20cm and the height of 50cm, and the treatment effect of ozone and hydrogen peroxide on the wastewater under different conditions is explored. The inlet water COD is 1700mg/L, BOD is 300mg/L, the contact reaction lasts for 2h, and the experimental conditions are as follows:
condition 1: separate ozone and hydrogen peroxide treatment (1.5 mg/mgCOD of ozone dosage and 7mg/mgCOD of 30% hydrogen peroxide concentration)
Condition 2: activated carbon, ozone and hydrogen peroxide (the added amount of activated carbon is 30mg/L ozone is 1.5mg/mgCOD, the concentration of 30 percent hydrogen peroxide is 7mg/mgCOD)
Condition 3: treating with active carbon, magnetic iron powder, ozone and hydrogen peroxide (adding active carbon 30mg/L magnetic iron powder 10mg/L ozone 1.5mg/mgCOD, 30% hydrogen peroxide 7mg/mgCOD)
According to the experimental results, the effect of oxidizing COD in wastewater under different component conditions is researched, and it can be seen that when the COD of the inlet water is 1700mg/L, the removal rate of COD by ozone and hydrogen peroxide reaches 37.0%, and the B/C ratio is increased from 0.176 to 0.294; the removal rate of COD by the activated carbon, the ozone and the hydrogen peroxide reaches 49.3 percent, and the B/C ratio is improved to 0.33 from 0.176; the removal rate of COD by the activated carbon, the magnetic iron powder, the ozone and the hydrogen peroxide reaches 60.0 percent, and the B/C ratio is improved to 0.453 from 0.176. The activated carbon, the magnetic iron powder, the ozone and the hydrogen peroxide have the highest removal effect, and the B/C of the wastewater is improved to 0.453, so that the stable and efficient operation of the back-end biochemical treatment is facilitated.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. A low-concentration degradation-resistant chemical wastewater treatment system, which is characterized by comprising:
a collection and regulation section, a heterogeneous catalytic oxidation section, a biological adsorption and oxidation separation section and a magnetic coagulation and precipitation zone,
an activated carbon powder adding device and a magnetic iron powder adding device are arranged at the water inlet end of the collecting and adjusting section, the activated carbon powder and the magnetic iron powder are added into an adjusting tank of the collecting and adjusting section, and the wastewater is lifted by a lifting pump to enter the collecting and adjusting section, wherein the content of the activated carbon in the adjusting tank is 10-90 mg/L of the wastewater, and the content of the magnetic iron powder is 1-30 mg/L of the wastewater;
the collecting and adjusting section is connected with the multiphase catalytic oxidation section through a lifting pump and a pipeline, a pipeline mixer is arranged between the lifting pump and the multiphase catalytic oxidation section, the pipeline mixer is communicated with a hydrogen peroxide adding device, the hydrogen peroxide is mixed with wastewater and enters the multiphase catalytic oxidation reaction section, and ozone generated by an ozone generating device is exposed into the multiphase catalytic oxidation reaction section from the bottom, wherein the adding amount of the hydrogen peroxide is 1-50mg/mg COD, and the adding amount of the ozone is 0.1-10 mg/mg COD;
the water outlet end of the heterogeneous catalytic oxidation is communicated with a biological adsorption and oxidation separation section, and the biological adsorption and oxidation separation section is divided into a biological contact oxidation unit and a mud-water separation unit;
the water outlet end of the biological adsorption oxidation separation section is communicated with the magnetic coagulation sedimentation section.
2. The low-concentration degradation-resistant chemical wastewater treatment system as claimed in claim 1, wherein a submersible stirrer is installed inside the collection regulating reservoir of the collection regulating section.
3. The low-concentration degradation-resistant chemical wastewater treatment system according to claim 1, wherein the heterogeneous catalytic oxidation section is provided with a heterogeneous catalytic oxidation tank.
4. The low-concentration degradation-resistant chemical wastewater treatment system according to claim 3, wherein hydrogen peroxide is mixed with wastewater and enters from a water distribution device at the bottom of a multiphase catalytic oxidation reaction tank.
5. The low-concentration degradation-resistant chemical wastewater treatment system according to claim 1, wherein the magnetic coagulation sedimentation section is divided into a flocculation area, a coagulation area and a sedimentation area.
6. The low-concentration degradation-resistant chemical wastewater treatment system as claimed in claim 5, wherein a sludge tank is arranged at the bottom of the settling zone, the sludge tank is connected with a high-shear machine through a pipeline, and the high-shear machine is connected with the magnetic separator through a pipeline.
7. The low-concentration degradation-resistant chemical wastewater treatment system according to claim 6, wherein the effluent of the magnetic separator and the separated magnetic iron powder flow back to the collection and regulation section through a magnetic powder reflux pump, and the residual sludge is discharged and treated through a sludge reflux water pump.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111762969A (en) * | 2020-06-30 | 2020-10-13 | 北京新林水务科技有限公司 | Low-concentration degradation-resistant chemical wastewater treatment method and system |
| CN114933391A (en) * | 2022-05-31 | 2022-08-23 | 安徽工程大学 | Advanced oxidation based method and device for advanced treatment of trace pollutants |
| CN115353256A (en) * | 2022-08-22 | 2022-11-18 | 山东华城工程技术有限公司 | Water purification treatment process for micro-polluted surface water source water |
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2020
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111762969A (en) * | 2020-06-30 | 2020-10-13 | 北京新林水务科技有限公司 | Low-concentration degradation-resistant chemical wastewater treatment method and system |
| CN111762969B (en) * | 2020-06-30 | 2023-10-20 | 北京新林水务科技有限公司 | Low-concentration degradation-resistant chemical wastewater treatment method and system |
| CN114933391A (en) * | 2022-05-31 | 2022-08-23 | 安徽工程大学 | Advanced oxidation based method and device for advanced treatment of trace pollutants |
| CN115353256A (en) * | 2022-08-22 | 2022-11-18 | 山东华城工程技术有限公司 | Water purification treatment process for micro-polluted surface water source water |
| CN115353256B (en) * | 2022-08-22 | 2024-04-16 | 山东华城工程技术有限公司 | Water purification treatment process for micro-polluted surface water source water |
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