CN116730523A - System and method for treating acidic high-concentration organic wastewater based on microwave catalytic enhancement - Google Patents
System and method for treating acidic high-concentration organic wastewater based on microwave catalytic enhancement Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 22
- 239000002351 wastewater Substances 0.000 title claims abstract description 21
- 230000002378 acidificating effect Effects 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 36
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000002156 mixing Methods 0.000 claims abstract description 20
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 20
- 239000003814 drug Substances 0.000 claims abstract description 16
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 14
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 239000012716 precipitator Substances 0.000 claims abstract description 11
- 239000003513 alkali Substances 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 238000005273 aeration Methods 0.000 claims abstract description 5
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 4
- 230000009471 action Effects 0.000 claims abstract description 4
- 229910001448 ferrous ion Inorganic materials 0.000 claims abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 53
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000009827 uniform distribution Methods 0.000 claims description 3
- 238000011282 treatment Methods 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 11
- 239000000843 powder Substances 0.000 abstract description 4
- 239000012028 Fenton's reagent Substances 0.000 abstract description 2
- 230000003213 activating effect Effects 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 abstract description 2
- 238000001556 precipitation Methods 0.000 abstract description 2
- 230000035484 reaction time Effects 0.000 abstract description 2
- 230000009257 reactivity Effects 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 2
- 238000007254 oxidation reaction Methods 0.000 description 8
- 239000010865 sewage Substances 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 5
- 239000007800 oxidant agent Substances 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000002306 biochemical method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 206010070834 Sensitisation Diseases 0.000 description 1
- 239000004113 Sepiolite Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008313 sensitization Effects 0.000 description 1
- 229910052624 sepiolite Inorganic materials 0.000 description 1
- 235000019355 sepiolite Nutrition 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/302—Treatment of water, waste water, or sewage by irradiation with microwaves
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention provides an acidic high-concentration organic wastewater treatment system and method based on microwave catalytic enhancement, comprising the following steps: the inlet water is subject to micro-electrolysis reaction with iron carbon in a micro-electrolysis reactor through aeration, and then is dischargedWater mixing H 2 O 2 After the powder active carbon is reacted with the powder active carbon, the powder active carbon is sensitized by microwave action and H mixed in the micro-electrolysis reactor is enhanced 2 O 2 And (3) carrying out Fenton reaction with ferrous ions, adding alkali liquor into the effluent of the microwave reactor in a neutralization deaerator to adjust the pH to be about 7, stirring and deaerating, and then carrying out precipitation by a high-efficiency precipitator, and then discharging water and discharging mud. The method utilizes the microwave field to intensify Fenton reaction treatment effect, shortens the reaction time and improves the efficiency; the microwave also has the function of temperature rise, and the temperature rise can improve the reactivity and the catalytic efficiency of the activating agents such as active carbon and the like; the low-price iron carbon is used for replacing ferrous salt to be used as the Fenton reagent, so that the cost of the medicament can be saved. Finally, the purposes of reducing COD in the wastewater are achieved, and the method is quick, efficient, low in cost and low in energy consumption.
Description
Technical Field
The invention belongs to the technical field of acid high-concentration organic wastewater treatment, and particularly relates to an acid high-concentration organic wastewater treatment system and method based on microwave catalytic reinforcement.
Background
The organic concentration of the agricultural and sideline product processing wastewater is high (COD concentration is up to tens of thousands of mg/L), the suspended matter concentration is high (SS concentration is up to thousands of mg/L), and the pH is low (acidity and organic acid content are high). According to the characteristic features of the wastewater, pretreatment can be performed by adopting physical precipitation and chemical precipitation, and COD reaches a limit value by adopting anaerobic biological treatment and aerobic biological biochemical treatment, but is affected by seasons, such as the production season of coffee in winter, the biochemical reaction cannot be effectively performed. Other common treatment methods for acidic organic wastewater are: although the methods are effective to a certain extent, the methods do not truly eliminate organic matters, are easy to produce secondary pollution, and the organic wastewater has the characteristics of high toxicity, poor biochemistry, difficult oxidation and the like, thus becoming a great difficulty in water treatment.
The prior art discloses CN 109019753B-a method for treating organic wastewater by cyclic sequencing batch microwave catalytic oxidation; and CN 101580288B-a zeolite-microwave-hydrogen peroxide combined method for treating organic wastewater.
However, the method has the following technical problems:
1) The pH value of the agricultural product processing wastewater is low, the alkali consumption is large, and the cost is high;
2) The season of agricultural product processing causes the difficulty in meeting the stable water inlet requirement of a biochemical method;
3) The biochemical method is difficult to run and the quality of the effluent is difficult to stabilize;
4) COD removal effect is poor;
5) The Fenton method has long time and high medicament cost.
Disclosure of Invention
The invention solves the technical problems of the background technology, and provides an acidic high-concentration organic wastewater treatment system and method based on microwave catalytic reinforcement.
The invention adopts the following technical scheme:
an acidic high-concentration organic wastewater treatment system based on microwave catalytic enhancement comprises a micro-electrolysis reactor and an H, which are sequentially arranged 2 O 2 -an AC mixing tank, a microwave reactor, a high efficiency precipitator and a neutralization deaerator;
also comprises an AC-doser, a blower, a dosing pump and H 2 O 2 A tank, a NaOH tank;
the micro-electrolysis reactor is a sealed cavity, the left side of the upper part is provided with a water inlet, and the water inlet is provided with an annular water distribution groove;
the micro-electrolysis reactor cavity is internally provided with a sieve plate, iron and carbon are uniformly arranged on the sieve plate, and the lower part of the sieve plate is provided with a water outlet;
the water outlet of the micro-electrolysis reactor is connected with H through an electric water valve 2 O 2 The left top water inlet of the AC mixing tank is connected,
the H is 2 O 2 The top of the AC mixing tank is provided with a stirrer,
the H is 2 O 2 The water outlet of the AC mixing tank is communicated with the water inlet at the lower part of the microwave reactor, and the upper part of the microwave reactor is provided with a water outlet which is communicated with the neutralization deaerator and the high-efficiency precipitator;
the microwave reactor is of a rectangular structure, at least three layers of fixed beds and a plurality of groups of magnetrons of a buffer layer, a sensitizer layer and a catalyst layer are sequentially arranged from top to bottom, a microwave field for generating microwaves uniformly is arranged inside the microwave reactor, the microwave field is generated by the magnetrons and is conducted by the waveguides and used for resonance conduction after uniform distribution of the microwaves in the microwave field, and the microwave field is generated by the magnetrons and is conducted by the waveguides and forms uniform microwave fields by the microwaves through the resonant cavity.
Preferably, the method comprises the steps of,
the H is 2 O 2 The tank is used for temporarily storing hydrogen peroxide, the NaOH tank is used for temporarily storing and preparing sodium hydroxide solution with a certain concentration, and the H is 2 O 2 Tank and dosing pump with said H 2 O 2 The upper part of the AC mixing tank is communicated, the AC medicine feeder is used for adding powdered activated carbon, the AC medicine feeder controls the rotating speed through a speed regulating motor, and the motor drives a screw rod to reciprocate so that the activated carbon powder is accurately and quantitatively fed into H 2 O 2 -an AC mixing tank;
the air outlet of the fan is communicated with the bottom of the micro-electrolysis reactor, and the fan is used for providing wind power for the micro-electrolysis reactor to form vortex at the bottom of the micro-electrolysis reactor and fully stir the wastewater and the iron carbon.
The dosing pump is used for a NaOH tank and H 2 O 2 The liquid medicament in the canister provides a metered timing of the medicament.
The water outlet of the microwave reactor is communicated with the left inlet of the upper part of the neutralization deaerator, the water outlet of the NaOH tank is communicated with the left side of the upper part of the neutralization deaerator through a dosing pump, and the upper part of the neutralization deaerator is provided with a stirrer so that NaOH alkali liquor and water to be treated of the microwave reactor are fully mixed.
The dosing pump, the motor, the electromagnetic valve and the fan are electrically connected with the PLC electric control cabinet to realize electrification control and automation, and a plurality of flowmeters and PH collectors are arranged in the whole passage, so that data are visualized; the on-off of the passage is realized by the necessary electronic meter.
The invention also provides a deviceThe working method of the agriculture and forestry product processing wastewater treatment system based on microwave reinforcement is characterized by comprising the following steps: the inlet water is subjected to micro-electrolysis reaction with iron carbon in a micro-electrolysis reactor through aeration, and the outlet water is mixed with H 2 O 2 And (3) after the reaction with the powdery active carbon, the mixture enters a microwave reactor for reaction, the powdery active carbon is sensitized by the action of microwaves, the Fenton reaction of H2O2 and ferrous ions mixed in the micro-electrolysis reactor is enhanced, the pH value of the effluent of the microwave reactor is regulated to be about 7 by adding alkali liquor in a neutralization deaerator, and after stirring and deaeration, the effluent is precipitated by a high-efficiency precipitator and then discharged and discharged.
The beneficial effects of the invention are as follows:
the acidic organic wastewater with low pH value meets the micro-electrolysis water inlet condition, and the pH value of the acidic organic wastewater is increased after the micro-electrolysis reaction so as to reduce the consumption of alkali; the Fenton method has good treatment effect on high-concentration organic waste acid wastewater by being used as a high-grade oxidation method, and the pH value of the Fenton method is 3-5;
the Fenton reaction treatment effect is enhanced by utilizing the microwave field, so that the reaction time is shortened, and the efficiency is improved; the microwave also has the function of temperature rise, and the temperature rise can improve the reactivity and the catalytic efficiency of the activating agents such as active carbon and the like;
the low-price iron carbon is used for replacing ferrous salt to be used as the Fenton reagent, so that the cost of the medicament can be saved. Finally, the purposes of reducing COD in the wastewater are achieved, and the method is quick, efficient, low in cost and low in energy consumption.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a block diagram of the device connection structure of the present invention
FIG. 3 is a process flow diagram of the present invention;
in the figure, a) a microelectrolysis reactor; b) H 2 O 2 -an AC mixing tank; c) An AC-doser; d) A blower; e) A dosing pump; f) H 2 O 2 A tank; g) A microwave reactor; h) A high-efficiency precipitator; i) PLC-electric control cabinet; j) A neutralization deaerator; k) NaOH tank.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in FIGS. 1-3, the embodiment provides an acidic high-concentration organic wastewater treatment system based on microwave catalytic enhancement, which comprises a micro-electrolysis reactor a and a micro-electrolysis reactor H which are sequentially arranged 2 O 2 -an AC mixing tank b, a microwave reactor g, a high efficiency precipitator h and a neutralisation deaerator j;
also comprises an AC-doser c, a fan d, a dosing pump e and H 2 O 2 Tank f, naOH tank k;
the micro-electrolysis reactor a is a sealed cavity, the left side of the upper part is provided with a water inlet, and the water inlet is provided with an annular water distribution groove;
the cavity of the micro-electrolysis reactor a is internally provided with a sieve plate, iron and carbon are uniformly arranged on the sieve plate, and the lower part of the sieve plate is provided with a water outlet;
in practice, iron carbon is necessarily arranged, only the iron carbon is not drawn in the figure, the arrangement of the iron carbon basically occupies 70-80% of the internal volume, the filling port is not necessarily arranged, the iron carbon can be directly added from the upper port, the iron carbon can be gradually consumed in the sewage treatment process until the treatment effect cannot be met, and the discharge port (slag hole) can be considered for supplementing.
The water outlet of the micro-electrolysis reactor a is connected with H through an electric water valve 2 O 2 The left top water inlet of the AC mixing tank b is connected,
the H is 2 O 2 The top of the AC mixing tank b is provided with a stirrer,
the H is 2 O 2 The water outlet of the AC mixing tank c is communicated with the water inlet at the lower part of the microwave reactor g, and the water outlet at the upper part of the microwave reactor g is communicated with the neutralization deaerator j and the high-efficiency precipitator h. Adopts a mode of 'low in and high out'. Strengthening Fenton catalytic oxidation reaction in a microwave field, and exerting sensitization effect of powdered activated carbon to improve removal effect of COD.
The H is 2 O 2 Tank f is used for temporarily storing hydrogen peroxide, naOH tank k is used for temporarily storing and preparing sodium hydroxide solution with a certain concentration, and H is 2 O 2 Tank f and dosing pump e with said H 2 O 2 The upper part of the AC mixing tank b is communicated, the AC medicine adder c is used for adding powdered activated carbon, the AC medicine adder c controls the rotating speed through a speed regulating motor, and the motor drives a screw rod to reciprocate so that the activated carbon powder is accurately and quantitatively fed into the H 2 O 2 -an AC mixing tank b;
the air outlet of the fan d is communicated with the bottom of the micro-electrolysis reactor a, and the fan is used for providing wind power for the micro-electrolysis reactor a to form vortex at the bottom of the micro-electrolysis reactor a and fully stirring the wastewater and the iron carbon.
The dosing pump e is used for preparing NaOH tanks k and H 2 O 2 The liquid medicament of tank f provides a metered timing of the addition of medicament.
The water outlet of the microwave reactor g is communicated with the left inlet at the upper part of the neutralization deaerator j, the water outlet of the NaOH tank k is communicated with the left inlet at the upper part of the neutralization deaerator j through a dosing pump e, and the upper part of the neutralization deaerator j is provided with a stirrer to enable NaOH alkali liquor to be fully mixed with water to be treated through the microwave reactor g.
The dosing pump e, the motor, the electromagnetic valve and the fan d are electrically connected with the PLC electric control cabinet i to realize electrification control and automation, and a plurality of flow meters and PH collectors are arranged in the whole passage, so that data are visualized; the on-off of the passage is realized by the necessary electronic meter.
As shown in fig. 1, a possibility is provided that a coil is provided in the microwave reactor in a sewage water inlet mode. The microwave reactor is mainly characterized in that the generation of a microwave field in the microwave reactor is mainly based on a magnetron, conduction is based on a waveguide tube, the distribution of microwaves in the microwave field is based on the design of a resonant cavity, the condition or scene of catalytic oxidation reaction is considered inside, and a sensitizer and a catalyst are arranged in a coil.
Adding a catalyst, a sensitizer and an oxidant into the sewage, and enabling the mixed solution to enter a microwave field for catalytic oxidation reaction. The method has the advantages that the sewage is fully contacted with the catalyst, the sensitizer and the oxidant, the treatment effect is good, and the recovery of the added medicament is difficult due to the obvious defect.
As shown in fig. 2, there is another possibility that a fixed bed is arranged in the microwave reactor, the microwave reactor is of a rectangular structure, a buffer layer, at least three layers of fixed beds of a sensitizer layer and a catalyst layer and a plurality of groups of magnetrons are sequentially arranged from top to bottom, and a microwave field for generating microwaves uniformly is arranged inside, and the microwave field is generated by the magnetrons and is conducted by the waveguide tube for resonance conduction after uniform distribution of microwaves in the microwave field.
The catalyst and the sensitizer form a fixed bed, so that recovery is avoided, the oxidant is dissolved in the sewage and consumed along with oxidation of pollutants in the sewage, and the multi-layer fixed bed is fully reacted. The assembly mode can simplify the process and is convenient to replace.
Example 2
As shown in fig. 3, the embodiment provides a method for treating acidic high-concentration organic wastewater based on microwave catalytic enhancement, which comprises the following steps: the inlet water is subject to micro-electrolysis reaction with iron carbon in a micro-electrolysis reactor a through aeration, and the outlet water is mixed with H 2 O 2 And (3) after the reaction with the powdery active carbon, the mixture enters a microwave reactor g to react, the powdery active carbon is sensitized by the action of microwaves, the Fenton reaction of H2O2 and ferrous ions mixed in the micro-electrolysis reactor is enhanced, the pH of the effluent of the microwave reactor g is regulated to be about 7 by adding alkali liquor in a neutralization deaerator, and after stirring and deaeration, the effluent is precipitated by a high-efficiency precipitator and then discharged and discharged.
The above procedure provides verification data to verify the relevance of the technical effects of the present embodiment and the relationship of quantitative addition analysis in the process:
1) Relationship between aeration time and pH value of wastewater
H 2 O 2 Relation between addition amount and COD of effluent
Note that: COD 2.8 x 10 x 4mg/L of inflow water
2) Relationship between sensitizer species and effluent COD
The optimal sensitizer is: activated carbon (powder), sepiolite has the effect of adjusting pH.
3) Relation between addition amount of activated carbon and COD of effluent
4) Relation between microwave treatment time and water outlet temperature
Note that: microwave output power 1800W is 50%, microwave working frequency 2450MHz, treatment time unit min, temperature unit DEG C, and various independent treatments.
5) Relation between microwave treatment oxidant, sensitizer and time and COD of effluent
6) Effect of microwave catalytic oxidation treatment on coffee waste water
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (7)
1. An acidic high-concentration organic wastewater treatment system and method based on microwave catalytic enhancement are characterized in that: comprises a micro-electrolysis reactor and H which are arranged in sequence 2 O 2 -an AC mixing tank, a microwave reactor, a high efficiency precipitator and a neutralization deaerator;
also comprises an AC-doser, a blower, a dosing pump and H 2 O 2 A tank, a NaOH tank;
the micro-electrolysis reactor is a sealed cavity, the left side of the upper part is provided with a water inlet, and the water inlet is provided with an annular water distribution groove;
the micro-electrolysis reactor cavity is internally provided with a sieve plate, iron and carbon are uniformly arranged on the sieve plate, and the lower part of the sieve plate is provided with a water outlet;
the water outlet of the micro-electrolysis reactor is connected with H through an electric water valve 2 O 2 The left top water inlet of the AC mixing tank is connected with the H 2 O 2 The top of the AC mixing tank is provided with a stirrer,
the H is 2 O 2 The water outlet of the AC mixing tank is communicated with the water inlet at the lower part of the microwave reactor, and the upper part of the microwave reactor is provided with a water outlet which is communicated with the neutralization deaerator and the high-efficiency precipitator;
the microwave reactor is of a rectangular structure, at least three layers of fixed beds and a plurality of groups of magnetrons of a buffer layer, a sensitizer layer and a catalyst layer are sequentially arranged from top to bottom, a microwave field for generating microwaves uniformly is arranged inside the microwave reactor, the microwave field is generated by the magnetrons and is conducted by the waveguides and used for resonance conduction after uniform distribution of the microwaves in the microwave field, and the microwave field is generated by the magnetrons and is conducted by the waveguides and forms uniform microwave fields by the microwaves through the resonant cavity.
2. The acidic high-concentration organic wastewater treatment system based on microwave catalytic enhancement as claimed in claim 1, wherein: the H is 2 O 2 The tank is used for temporarily storing hydrogen peroxide, the NaOH tank is used for temporarily storing and preparing sodium hydroxide solution with a certain concentration, and the H is 2 O 2 Tank and dosing pump with said H 2 O 2 The upper part of the AC mixing tank is communicated, the AC medicine feeder is used for adding powdered activated carbon, the AC medicine feeder controls the rotating speed through a speed regulating motor, and the motor drives a screw rod to reciprocate so that the activated carbon powder is accurately and quantitatively fed into H 2 O 2 -an AC mixing tank.
3. The acidic high-concentration organic wastewater treatment system based on microwave catalytic enhancement as claimed in claim 1, wherein: the air outlet of the fan is communicated with the bottom of the micro-electrolysis reactor, and the fan is used for providing wind power for the micro-electrolysis reactor to form vortex at the bottom of the micro-electrolysis reactor and fully stir the wastewater and the iron carbon.
4. The acidic high-concentration organic wastewater treatment system based on microwave catalytic enhancement as claimed in claim 1, wherein: the dosing pump is used for a NaOH tank and H 2 O 2 The liquid medicament in the canister provides a metered timing of the medicament.
5. The acidic high-concentration organic wastewater treatment system based on microwave catalytic enhancement as claimed in claim 1, wherein: the water outlet of the microwave reactor is communicated with the left inlet of the upper part of the neutralization deaerator, the water outlet of the NaOH tank is communicated with the left side of the upper part of the neutralization deaerator through a dosing pump, and the upper part of the neutralization deaerator is provided with a stirrer so that NaOH alkali liquor and water to be treated of the microwave reactor are fully mixed.
6. An acidic high-concentration organic wastewater treatment system based on microwave catalytic enhancement as claimed in claims 1-5, wherein: the dosing pump, the motor, the electromagnetic valve and the fan are electrically connected with the PLC electric control cabinet to realize electrification control and automation, and a plurality of flowmeters and PH collectors are arranged in the whole passage, so that data are visualized; the on-off of the passage is realized by the necessary electronic meter.
7. A method of treating an acidic high concentration organic wastewater system based on microwave catalytic enhancement as claimed in claim 1, comprising the steps of: the inlet water is subjected to micro-electrolysis reaction with iron carbon in a micro-electrolysis reactor through aeration, and the outlet water is mixed with H 2 O 2 And (3) after the reaction with the powdery active carbon, the mixture enters a microwave reactor for reaction, the powdery active carbon is sensitized by the action of microwaves, the Fenton reaction of H2O2 and ferrous ions mixed in the micro-electrolysis reactor is enhanced, the pH value of the effluent of the microwave reactor is regulated to be about 7 by adding alkali liquor in a neutralization deaerator, and after stirring and deaeration, the effluent is precipitated by a high-efficiency precipitator and then discharged and discharged.
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