CN108033625B - Electrolytic oxidation pretreatment method for vitamin C wastewater - Google Patents
Electrolytic oxidation pretreatment method for vitamin C wastewater Download PDFInfo
- Publication number
- CN108033625B CN108033625B CN201711112293.2A CN201711112293A CN108033625B CN 108033625 B CN108033625 B CN 108033625B CN 201711112293 A CN201711112293 A CN 201711112293A CN 108033625 B CN108033625 B CN 108033625B
- Authority
- CN
- China
- Prior art keywords
- wastewater
- vitamin
- electrolytic oxidation
- water
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F1/46114—Electrodes in particulate form or with conductive and/or non conductive particles between them
-
- 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
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
-
- 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
-
- 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
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
- C02F3/342—Biological treatment of water, waste water, or sewage characterised by the microorganisms used characterised by the enzymes used
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a vitamin C wastewater electrolytic oxidation pretreatment method, which belongs to the technical field of wastewater treatment, wherein the vitamin C wastewater is degraded step by step through three parts, and in the first step, bubbles which are blown out by an atomized low-foam activating agent along with a bubbling machine are contacted with the vitamin C wastewater, so that the contact area is enlarged, and the surface activation of the vitamin C wastewater is facilitated; secondly, performing neutron impact on the wastewater through a pulse neutron activator to provide energy for organic matters in the wastewater, so that internal electrons of the wastewater are transited to an excited state; and thirdly, performing final electrolytic oxidation on the wastewater activated in the first two steps by using an electrolytic oxidation reactor. After the hierarchical activation, the final electrolytic oxidation decomposition efficiency can be greatly improved. In a word, the invention has good pretreatment effect and creates good conditions for the subsequent biological strengthening process.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a method for vitamin C wastewater electrolytic oxidation pretreatment.
Background
Vitamin C (also called L-ascorbic acid, VC for short) is a nutrition enhancer and functional antioxidant which are needed by human beings, is the vitamin variety which has the widest global application range and the largest output and sale quantity at present, is widely applied to industries such as medicines, food, beverages, feeds and the like, and is also one of the varieties with the largest annual output and export quantity of Chinese pharmaceutical enterprises. Since 1998, the export amount of vitamin C is increased year by year, the export amount of 21 years reaches 11. ten thousand tons, which accounts for more than 9% of the global demand, and most of the export amount of vitamin C comes from 5 pharmaceutical enterprises in China, and China becomes a genuine world for producing vitamin C.
Domestic VC production enterprises mostly adopt a two-step fermentation process, sorbitol, corn steep liquor and the like are taken as main raw materials, and the raw materials and byproducts which are not utilized in the production process become high-concentration organic wastewater to be discharged through several working sections of fermentation, extraction, conversion and refining. The wastewater has high COD concentration, high chroma, true color, high salinity and large change of water quality and water quantity.
After secondary biochemical treatment, the vitamin C wastewater still has the characteristics of high chroma, high salt content, complex components and the like, the wastewater has poor biodegradability, the treatment difficulty is high by using a traditional biological method, and certain pretreatment measures must be adopted. The electrochemical method has the advantages of simple process, convenient operation, clear and transparent effluent quality, high pollutant removal rate, no influence of seasonal climate and temperature and the like, is more and more emphasized by people, and becomes one of the common methods for pretreatment of the nonbiodegradable wastewater at present.
Aiming at the problem that the prior vitamin C production wastewater is difficult to meet the requirement of new standards after being treated by the traditional process, the electrolytic oxidation technology is introduced as a pretreatment process. The electrolytic oxidation, which requires less additional chemical agents and does not cause secondary pollution, is called as a cleaning treatment process and is widely used in the advanced treatment and pretreatment processes of wastewater. The electrolysis process can be divided into two types, namely electrolytic flocculation and electrolytic oxidation according to whether the used electrode anode is a stripping electrode, wherein the former is mostly applied to the degradation and pretreatment of high-concentration organic wastewater and the removal of heavy metal ions; the latter is mostly applied to removing the chroma in the wastewater and improving the biodegradability of the refractory wastewater. The two processes have advantages and disadvantages respectively, and the treatment objects are different.
The vitamin C production wastewater, as a fermentation pharmaceutical wastewater, has the characteristics of high salt content, good conductivity and the like, is suitable for electrolytic oxidation treatment, but can easily cause scaling and electrode corrosion of a reaction device, and influences the use effect and the service life of the electrolysis device. Therefore, the reaction apparatus is required to be easily disassembled, to be conveniently cleaned and maintained, and to be conveniently replaced.
However, the commonly used concentric circle arrangement electrode reactor has small electrode area and poor electrolysis effect. The polar plate of the parallel plate type waste water electrolysis device is fixed by upper screws, so that the parallel plate type waste water electrolysis device is easy to rust and difficult to replace; adopt the suspension type, can conveniently take out, nevertheless hang the part and influence into water and operate, and parallel plate formula treatment effect is lower relatively.
Disclosure of Invention
Aiming at the technical problems, the invention provides a method for the electrolytic oxidation pretreatment of vitamin C wastewater, which solves the problems of high chroma, high salt content and complex components of the vitamin C wastewater after secondary biochemical treatment.
The technical scheme of the invention is as follows: a method for the electrolytic oxidation pretreatment of vitamin C wastewater comprises the following steps:
s1: introducing the vitamin C wastewater subjected to secondary biochemical treatment into a water storage tank, carrying out bubbling aeration by using a bubbling machine for 15-30min at an aeration flow rate of 40-60m/s, adding a low-foam activating agent in batches for 3-5 times by using an atomizing machine, wherein the total adding dosage of the low-foam activating agent is 8-10g/L, and carrying out surface layer activation on organic matters in the vitamin C wastewater by using the low-foam activating agent to obtain primary activated wastewater;
s2, skimming upper-layer foams of the primary activated wastewater after bubbling aeration is finished, adjusting the pH value to 4-10, pumping the primary activated wastewater through a pulse neutron activator by using a water pump, wherein the flow velocity of water is 1-3m/S, the pulse frequency of the pulse neutron activator is 10-20KHZ, the distance between a neutron source and the water surface is 0.5-1m, and the neutron fluence rate is 1 × 1013-2×1013n.cm-2.s-1Deeply activating organic matters in the primary activation wastewater by utilizing neutron transfer energy to obtain secondary activation wastewater;
s3: directly introducing the secondary activated wastewater into an electrolytic oxidation reactor for electrolytic oxidation reaction, and adding three-dimensional electrode particles, wherein the volume ratio of the three-dimensional electrode particles to the secondary activated wastewater is 1:3-5, the diameter of the three-dimensional electrode particles is 0.8-1.2cm, the electrolysis time is 5-15min, the voltage is 3-7V, and the current density is 30-50mA/cm2The distance between the polar plates is 15-35mm, and a pretreated water body is obtained;
s4: sampling the pretreated water body to obtain a water quality analysis result of the pretreated water body, and adjusting subsequent biological strengthening process parameters according to the analysis result.
Further, a mist outlet pipe of the atomizer is connected with an air outlet pipe of the bubbling machine, the atomizer atomizes the low-foam activating agent and then sends the low-foam activating agent into the air outlet pipe through the mist outlet pipe, the atomized low-foam activating agent is brought into the vitamin C wastewater by the gas blown into the air outlet pipe, the flow rate ratio of the atomized low-foam activating agent to the gas is 1:8-10, the atomized low-foam activating agent contacts with the vitamin C wastewater along with the bubbles blown out by the bubbling machine, the contact area can be further enlarged, and the surface activation of the vitamin C wastewater is facilitated.
Further, the low-foaming activator is formed by mixing sodium carbonate, sodium hydroxide, oxidase and deionized water according to the mass ratio of 3:1:2:10, vitamin C is an antioxidant, is easily soluble in water, is insoluble in an organic solvent and is stable in an acidic environment, and alkaline substances and oxidase can destroy the stability of the vitamin C.
Furthermore, the oxidase is any one or combination of more of urate oxidase, D-amino acid oxidase, L-amino acid oxidase and L-alpha-hydroxy acid oxidase.
Further, the three-dimensional electrode particle comprises the following components in parts by weight: 20-50 parts of germanium oxide, 30-50 parts of anthracite, 25-35 parts of cement powder, 38-56 parts of silicon dioxide, 20-45 parts of glass powder, 15-25 parts of carbon nano tubes, 18-34 parts of colloidal graphite powder, 13-22 parts of shrimp shell powder, 10-20 parts of shale powder, 3-5 parts of an activating agent, 4-6 parts of a pore-forming agent and 30-40 parts of a binder, wherein the conductivity of the three-dimensional electrode particles is increased through a conductive material, the contact resistance between materials is increased through adding an insulating substance, the materials are bonded through the binder, and the specific surface area of the pore-forming agent is increased, so that the effect of electrolytic oxidation is enhanced.
Further, the preparation method of the three-dimensional electrode particle comprises the following steps:
A. mixing the germanium oxide, anthracite, cement powder, silicon dioxide, glass powder, shrimp shell powder and shale powder according to the proportion, drying in an oven at 120 ℃, then putting in a mortar for crushing and grinding, and finally sieving by a 60-mesh sieve to obtain mixed dry powder;
B. adding the carbon nano tube, the colloidal graphite powder, the activating agent, the pore-forming agent and the binder in percentage by weight into the mixed dry powder, mixing and stirring uniformly, and extruding raw material balls with the particle size of 0.8-1.2 cm;
C. drying the raw material balls in an oven at the temperature of 100-120 ℃ for 12-24 hours to obtain dried raw material balls;
D. and (3) roasting the dried raw material ball in a high-temperature furnace at the temperature of 100-250 ℃ for 1-2h, then roasting at the temperature of 400-500 ℃ for 20-40min, finally roasting at the temperature of 600-1000 ℃ for 15-25min, and naturally cooling to room temperature to obtain the three-dimensional electrode particle.
Further, electrolytic oxidation reactor includes electrolysis post, inlet tube, anode plate, negative plate, central support and base, the base sets up the bottom of electrolysis post, electrolysis post are from last to being divided into out basin, electrolysis district and heavy mud district down in proper order, the right side in play basin is equipped with the delivery port, heavy mud district is conical, and the bottom in heavy mud district is equipped with row mud mouth, the central support sets up in the juncture of heavy mud district and electrolysis district, the inlet tube is located electrolysis post axis of ordinates central point and puts to the central point that the lower extreme of inlet tube was fixed at the central support puts, is equipped with a plurality of inlet openings on the inlet tube, and the inlet tube outside is from last to being equipped with a plurality of inner notches of equidistant under to, inner notch becomes radial around the inlet tube, is equipped with the outer end notch with inner notch one-to-one on the inside wall in electrolysis district, The negative plates are same in number, are respectively clamped between the inner end notches and the outer end notches in a staggered manner and are respectively connected with the positive electrode and the negative electrode of an external power supply through leads, an air ring pipe is arranged below the outer side wall of the electrolysis area and is connected with an external aeration device, mixed gas is introduced into the electrolysis area, the reaction device is easy to disassemble and clean and maintain, and the electrodes are convenient to replace.
Furthermore, the electrolytic oxidation reactor is also provided with a top cover, the top cover is connected with the upper part of the electrolytic column through a sealing thread, the top of the top cover is provided with a central hole, the left side and the right side of the central hole are respectively provided with a wire guide hole, the top cover completely covers the water outlet area, and the right side of the top cover is provided with a water outlet valve pipe communicated with the water outlet.
Furthermore, the mixed gas is ozone, oxygen and air in a volume ratio of 3:2:1, and the ozone can assist in oxidation, so that the oxidation efficiency of the wastewater is improved.
Further, the anode plate is graphite, the negative plate is the stainless steel, and anode plate and negative plate are concave structure, concave structure's anode plate and negative plate through with inner notch, outer end notch joint form detachable construction, the change of the plate electrode of being convenient for.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, vitamin C wastewater is degraded step by step through three parts, firstly, bubbles blown out by an atomized low-foam activating agent along with a bubbling machine are contacted with the vitamin C wastewater, so that the contact area is enlarged, and the surface activation of the vitamin C wastewater is facilitated, wherein the low-foam activating agent is formed by mixing sodium carbonate, sodium hydroxide, oxidase and deionized water and is used for destroying the stability of vitamin C and preliminarily activating the vitamin C; secondly, performing neutron impact on the wastewater through a pulse neutron activator to provide energy for organic matters in the wastewater, so that internal electrons of the wastewater are transited to an excited state; and thirdly, carrying out final electrolytic oxidation on the wastewater activated in the first two steps by using an electrolytic oxidation reactor, wherein the final electrolytic oxidation is easier after the activation in the first two steps, the efficiency of oxidative decomposition is greatly improved, and the chromaticity and the salt content in the vitamin C wastewater can be effectively reduced. The self-designed electrolytic oxidation reactor has the advantages of easy disassembly, convenient cleaning and maintenance, convenient replacement of electrodes, long service life and the like, and further improves the efficiency of electrolytic oxidation. In a word, the invention has good pretreatment effect, can greatly reduce the chroma and the salt content in the vitamin C wastewater, and creates good conditions for the subsequent biological strengthening process.
Drawings
FIG. 1 is a schematic view of the overall structure of an electrolytic oxidation reactor of the present invention.
Wherein, 1-electrolytic column, 11-water outlet area, 111-water outlet, 12-electrolytic area, 121-air ring pipe, 13-mud settling area, 131-mud discharging port, 2-water inlet pipe, 21-water inlet hole, 22-inner end notch, 23-outer end notch, 3-anode plate, 4-cathode plate, 5-center bracket, 6-base, 7-external power supply, 8-external aeration device, 9-top cover, 91-center hole, 92-wire guide hole and 93-water outlet valve pipe.
Detailed Description
Example 1
A method for the electrolytic oxidation pretreatment of vitamin C wastewater comprises the following steps:
s1: introducing the vitamin C wastewater subjected to secondary biochemical treatment into a water storage tank, carrying out bubbling aeration by using a bubbling machine for 15min at an aeration flow rate of 40m/s, adding a low-foam activating agent in batches for 3 times by using an atomizing machine, wherein the total adding dose of the low-foam activating agent is 8g/L, and carrying out surface layer activation on organic matters in the vitamin C wastewater by using the low-foam activating agent to obtain primary activated wastewater; the low-foam activating agent is atomized by the atomizer and then is sent into the gas outlet pipe through the gas outlet pipe, the atomized low-foam activating agent is brought into the vitamin C wastewater by the gas blown into the gas outlet pipe, the flow rate ratio of the atomized low-foam activating agent to the gas is 1:8, the atomized low-foam activating agent contacts with the vitamin C wastewater along with bubbles blown out by the bubbler, the contact area can be further enlarged, and the surface activation of the vitamin C wastewater is facilitated. The low-foaming activator is formed by mixing sodium carbonate, sodium hydroxide, oxidase (urate oxidase) and deionized water according to the mass ratio of 3:1:2:10, vitamin C is an antioxidant, is easily soluble in water, is insoluble in an organic solvent and is stable in an acidic environment, and alkaline substances and the oxidase can destroy the stability of the vitamin C.
S2, skimming upper-layer foams of the primary activated wastewater after bubbling aeration is finished, adjusting the pH value to be 4, pumping the primary activated wastewater through a pulse neutron activator by using a water pump, wherein the flow velocity of water is 1m/S, the pulse frequency of the pulse neutron activator is 10KHZ, the distance between a neutron source and the water surface is 0.5m, and the neutron fluence rate is 1 × 1013n.cm-2.s-1Deeply activating organic matters in the primary activation wastewater by utilizing neutron transfer energy to obtain secondary activation wastewater;
s3: directly introducing the secondary activated wastewater into an electrolytic oxidation reactor for electrolytic oxidation reaction, and adding three-dimensional electrode particlesThe volume ratio of the three-dimensional electrode particles to the secondary activated wastewater is 1:3, the diameter of the three-dimensional electrode particles is 0.8cm, the electrolysis time is 5min, the voltage is 3V, and the current density is 30mA/cm2The distance between the polar plates is 15mm, and a pretreated water body is obtained;
the three-dimensional electrode particle comprises the following components in parts by weight: 20 parts of germanium oxide, 30 parts of anthracite, 25 parts of cement powder, 38 parts of silicon dioxide, 20 parts of glass powder, 15 parts of carbon nano tube, 18 parts of colloidal graphite powder, 13 parts of shrimp shell powder, 10 parts of shale powder, 3 parts of activating agent, 4 parts of pore-forming agent and 30 parts of binding agent, wherein the conductivity of the three-dimensional electrode particles is increased through a conductive material, the contact resistance between the materials is increased by adding an insulating substance, the binding agent is utilized for binding, the specific surface area of the pore-forming agent is increased, and the electrolytic oxidation effect is further enhanced.
The preparation method of the three-dimensional electrode particle comprises the following steps:
A. mixing germanium oxide, anthracite, cement powder, silicon dioxide, glass powder, shrimp shell powder and shale powder according to the proportion, drying in an oven at 120 ℃, then putting in a mortar for crushing and grinding, and finally sieving by a 60-mesh sieve to obtain mixed dry powder;
B. adding the carbon nano tube, the colloidal graphite powder, the activating agent, the pore-forming agent and the binder in the weight percentage into the mixed dry powder, mixing and stirring uniformly, and extruding raw material balls with the particle size of 0.8 cm;
C. drying the raw material balls in an oven at 100 ℃ for 12 hours to obtain dried raw material balls;
D. and (3) roasting the dried raw material balls in a high-temperature furnace at 100 ℃ for 1h, roasting at 400 ℃ for 20min, finally roasting at 600 ℃ for 15min, and naturally cooling to room temperature to obtain the three-dimensional electrode particles.
Wherein, the electrolytic oxidation reactor comprises an electrolytic column 1, a water inlet pipe 2, an anode plate 3, a cathode plate 4, a central support 5 and a base 6, the base 6 is arranged at the bottom of the electrolytic column 1, the electrolytic column 1 is divided into a water outlet area 11, an electrolytic area 12 and a sludge settling area 13 from top to bottom in sequence, the right side of the water outlet area 11 is provided with a water outlet 111, the sludge settling area 13 is conical, the bottom of the sludge settling area 13 is provided with a sludge discharge port 131, the central support 5 is arranged at the junction of the sludge settling area 13 and the electrolytic area 12, the water inlet pipe 2 is positioned at the central position of the longitudinal axis of the electrolytic column 1, the lower end of the water inlet pipe 2 is fixed at the central position of the central support 5, the water inlet pipe 2 is provided with a plurality of water inlet holes 21, the outer side of the water inlet pipe 2 is provided with a plurality of inner end notches 22 with equal intervals from top, the anode plate 3 is made of graphite, the cathode plate 4 is made of stainless steel and is of the same number, the anode plate 3 and the cathode plate 4 are of concave structures, the anode plate 3 and the cathode plate 4 are respectively clamped between the inner end notch 22 and the outer end notch 23 in a staggered mode and are respectively connected with the anode and the cathode of an external power supply 7 through leads, an air ring pipe 121 is arranged below the outer side wall of the electrolysis region 12, the air ring pipe 121 is connected with an external aeration device 8, mixed gas is introduced into the electrolysis region 12, the mixed gas is ozone, oxygen and air in a volume ratio of 3:2:1, the ozone can assist in oxidation, and the oxidation efficiency of. The reaction device is easy to disassemble, convenient to clean and maintain and convenient for replacing the electrode. The electrolytic oxidation reactor is also provided with a top cover 9, the top cover 9 is connected with the upper part of the electrolytic column 1 through a sealing thread, the top of the top cover 9 is provided with a central hole 91, the left side and the right side of the central hole 91 are respectively provided with a wire hole 92, the top cover 9 completely covers the water outlet area 11, and the right side of the top cover 9 is provided with a water outlet valve pipe 93 communicated with the water outlet 111.
S4: sampling the pretreated water body to obtain a water quality analysis result of the pretreated water body, and adjusting subsequent biological strengthening process parameters according to the analysis result.
Example 2
This embodiment is substantially the same as embodiment 1 except for the following:
s2, skimming upper-layer foams of the primary activated wastewater after bubbling aeration is finished, adjusting the pH value to 7, pumping the primary activated wastewater through a pulse neutron activator by using a water pump, wherein the flow velocity of water is 1m/S, the pulse frequency of the pulse neutron activator is 10KHZ, the distance between a neutron source and the water surface is 0.5m, and the neutron fluence rate is 1 × 1013n.cm-2.s-1Deeply activating organic matters in the primary activation wastewater by utilizing neutron transfer energy to obtain secondary activation wastewater;
s3: directly introducing the secondary activated wastewater into an electrolytic oxidation reactor for electrolytic oxidation reaction, and adding three-dimensional electrode particles, wherein the volume ratio of the three-dimensional electrode particles to the secondary activated wastewater is 1:3, the diameter of the three-dimensional electrode particles is 0.8cm, the electrolysis time is 5min, the voltage is 5V, and the current density is 40mA/cm2And the distance between the polar plates is 25mm, so as to obtain the pretreated water body.
Example 3
This embodiment is substantially the same as embodiment 1 except for the following:
s2, skimming upper-layer foams of the primary activated wastewater after bubbling aeration is finished, adjusting the pH value to 10, pumping the primary activated wastewater through a pulse neutron activator by using a water pump, wherein the flow velocity of water is 1m/S, the pulse frequency of the pulse neutron activator is 10KHZ, the distance between a neutron source and the water surface is 0.5m, and the neutron fluence rate is 1 × 1013n.cm-2.s-1Deeply activating organic matters in the primary activation wastewater by utilizing neutron transfer energy to obtain secondary activation wastewater;
s3: directly introducing the secondary activated wastewater into an electrolytic oxidation reactor for electrolytic oxidation reaction, and adding three-dimensional electrode particles, wherein the volume ratio of the three-dimensional electrode particles to the secondary activated wastewater is 1:3, the diameter of the three-dimensional electrode particles is 0.8cm, the electrolysis time is 5min, the voltage is 7V, and the current density is 50mA/cm2And the distance between the polar plates is 35mm, so that the pretreated water body is obtained.
Example 4
A method for the electrolytic oxidation pretreatment of vitamin C wastewater comprises the following steps:
s1: introducing the vitamin C wastewater subjected to secondary biochemical treatment into a water storage tank, carrying out bubbling aeration by using a bubbling machine for 25min at an aeration flow rate of 50m/s, adding a low-foam activating agent in batches for 4 times by using an atomizing machine, wherein the total adding dose of the low-foam activating agent is 9g/L, and carrying out surface layer activation on organic matters in the vitamin C wastewater by using the low-foam activating agent to obtain primary activated wastewater; the low-foam activating agent is atomized by the atomizer and then is sent into the gas outlet pipe through the gas outlet pipe, the atomized low-foam activating agent is brought into the vitamin C wastewater by the gas blown into the gas outlet pipe, the flow rate ratio of the atomized low-foam activating agent to the gas is 1:9, the atomized low-foam activating agent contacts with the vitamin C wastewater along with bubbles blown out by the bubbler, the contact area can be further enlarged, and the surface activation of the vitamin C wastewater is facilitated. The low-foam activating agent is prepared by mixing sodium carbonate, sodium hydroxide, oxidase (D-amino acid oxidase) and deionized water according to the mass ratio of 3:1:2:10, vitamin C is an antioxidant, is easy to dissolve in water, is insoluble in an organic solvent and is stable in an acidic environment, and alkaline substances and the oxidase can damage the stability of the vitamin C.
S2, skimming upper-layer foams of the primary activated wastewater after bubbling aeration is finished, adjusting the pH value to 7, pumping the primary activated wastewater through a pulse neutron activator by using a water pump, wherein the flow velocity of water is 2m/S, the pulse frequency of the pulse neutron activator is 15KHZ, the distance between a neutron source and the water surface is 0.8m, and the neutron fluence rate is 1.5 × 1013n.cm-2.s-1Deeply activating organic matters in the primary activation wastewater by utilizing neutron transfer energy to obtain secondary activation wastewater;
s3: directly introducing the secondary activated wastewater into an electrolytic oxidation reactor for electrolytic oxidation reaction, and adding three-dimensional electrode particles, wherein the volume ratio of the three-dimensional electrode particles to the secondary activated wastewater is 1:4, the diameter of the three-dimensional electrode particles is 1cm, the electrolysis time is 10min, the voltage is 5V, and the current density is 30mA/cm2The distance between the polar plates is 35mm, and a pretreated water body is obtained;
the three-dimensional electrode particle comprises the following components in parts by weight: 35 parts of germanium oxide, 40 parts of anthracite, 30 parts of cement powder, 43 parts of silicon dioxide, 35 parts of glass powder, 20 parts of carbon nano tube, 26 parts of colloidal graphite powder, 18 parts of shrimp shell powder, 15 parts of shale powder, 4 parts of activating agent, 5 parts of pore-forming agent and 35 parts of binding agent.
The preparation method of the three-dimensional electrode particle comprises the following steps:
A. mixing germanium oxide, anthracite, cement powder, silicon dioxide, glass powder, shrimp shell powder and shale powder according to the proportion, drying in an oven at 120 ℃, then putting in a mortar for crushing and grinding, and finally sieving by a 60-mesh sieve to obtain mixed dry powder;
B. adding the carbon nano tube, the colloidal graphite powder, the activating agent, the pore-forming agent and the binder in the weight percentage into the mixed dry powder, mixing and stirring uniformly, and extruding raw material balls with the particle size of 1.0 cm;
C. drying the raw material balls in an oven at 110 ℃ for 20 hours to obtain dried raw material balls;
D. and (3) roasting the dried raw material balls in a high-temperature furnace at 200 ℃ for 1.5h, roasting at 450 ℃ for 30min, finally roasting at 800 ℃ for 20min, and naturally cooling to room temperature to obtain the three-dimensional electrode particles.
Wherein, the electrolytic oxidation reactor comprises an electrolytic column 1, a water inlet pipe 2, an anode plate 3, a cathode plate 4, a central support 5 and a base 6, the base 6 is arranged at the bottom of the electrolytic column 1, the electrolytic column 1 is divided into a water outlet area 11, an electrolytic area 12 and a sludge settling area 13 from top to bottom in sequence, the right side of the water outlet area 11 is provided with a water outlet 111, the sludge settling area 13 is conical, the bottom of the sludge settling area 13 is provided with a sludge discharge port 131, the central support 5 is arranged at the junction of the sludge settling area 13 and the electrolytic area 12, the water inlet pipe 2 is positioned at the central position of the longitudinal axis of the electrolytic column 1, the lower end of the water inlet pipe 2 is fixed at the central position of the central support 5, the water inlet pipe 2 is provided with a plurality of water inlet holes 21, the outer side of the water inlet pipe 2 is provided with a plurality of inner end notches 22 with equal intervals from top, the anode plate 3 is made of graphite, the cathode plate 4 is made of stainless steel and is of the same number, the anode plate 3 and the cathode plate 4 are of concave structures, the anode plate 3 and the cathode plate 4 are respectively clamped between the inner end notch 22 and the outer end notch 23 in a staggered mode and are respectively connected with the anode and the cathode of an external power supply 7 through leads, an air ring pipe 121 is arranged below the outer side wall of the electrolysis region 12, the air ring pipe 121 is connected with an external aeration device 8, mixed gas is introduced into the electrolysis region 12, the mixed gas is ozone, oxygen and air in a volume ratio of 3:2:1, the ozone can assist in oxidation, and the oxidation efficiency of. The reaction device is easy to disassemble, convenient to clean and maintain and convenient for replacing the electrode. The electrolytic oxidation reactor is also provided with a top cover 9, the top cover 9 is connected with the upper part of the electrolytic column 1 through a sealing thread, the top of the top cover 9 is provided with a central hole 91, the left side and the right side of the central hole 91 are respectively provided with a wire hole 92, the top cover 9 completely covers the water outlet area 11, and the right side of the top cover 9 is provided with a water outlet valve pipe 93 communicated with the water outlet 111.
S4: sampling the pretreated water body to obtain a water quality analysis result of the pretreated water body, and adjusting subsequent biological strengthening process parameters according to the analysis result.
Example 5
This embodiment is substantially the same as embodiment 4 except for the following:
s2: after bubbling aeration is finished, skimming upper-layer foams of the primary activated wastewater, adjusting the pH value to be 10, pumping the primary activated wastewater through the interior of a pulse neutron activator by using a water pump, wherein the flow velocity of water is 2m/s, the pulse frequency of the pulse neutron activator is 15KHZ, the distance between a neutron source and the water surface is 0.8m, and the neutron fluence rate is 1.5n.cm-2.s-1Deeply activating organic matters in the primary activation wastewater by utilizing neutron transfer energy to obtain secondary activation wastewater;
s3: directly introducing the secondary activated wastewater into an electrolytic oxidation reactor for electrolytic oxidation reaction, and adding three-dimensional electrode particles, wherein the volume ratio of the three-dimensional electrode particles to the secondary activated wastewater is 1:4, the diameter of the three-dimensional electrode particles is 1.0cm, the electrolysis time is 10min, the voltage is 5V, and the current density is 40mA/cm2And the distance between the polar plates is 15mm, so as to obtain the pretreated water body.
Example 6
This embodiment is substantially the same as embodiment 4 except for the following:
s2: after bubbling aeration is finished, skimming upper-layer foams of the primary activated wastewater, adjusting the pH value to be 4, pumping the primary activated wastewater through the interior of a pulse neutron activator by using a water pump, wherein the flow velocity of water is 2m/s, the pulse frequency of the pulse neutron activator is 15KHZ, and the distance between a neutron source and the water surfaceThe distance is 0.8m, the neutron fluence rate is 1.5n.cm-2.s-1Deeply activating organic matters in the primary activation wastewater by utilizing neutron transfer energy to obtain secondary activation wastewater;
s3: directly introducing the secondary activated wastewater into an electrolytic oxidation reactor for electrolytic oxidation reaction, and adding three-dimensional electrode particles, wherein the volume ratio of the three-dimensional electrode particles to the secondary activated wastewater is 1:4, the diameter of the three-dimensional electrode particles is 1.0cm, the electrolysis time is 10min, the voltage is 5V, and the current density is 50mA/cm2And the distance between the polar plates is 25mm, so as to obtain the pretreated water body.
Example 7
A method for the electrolytic oxidation pretreatment of vitamin C wastewater comprises the following steps:
s1: introducing the vitamin C wastewater subjected to secondary biochemical treatment into a water storage tank, carrying out bubbling aeration by using a bubbling machine for 30min at an aeration flow rate of 60m/s, adding a low-foam activating agent in batches for 5 times by using an atomizing machine, wherein the total adding dose of the low-foam activating agent is 10g/L, and carrying out surface layer activation on organic matters in the vitamin C wastewater by using the low-foam activating agent to obtain primary activated wastewater; the low-foam activating agent is atomized by the atomizer and then is sent into the gas outlet pipe through the gas outlet pipe, the atomized low-foam activating agent is brought into the vitamin C wastewater by the gas blown into the gas outlet pipe, the flow rate ratio of the atomized low-foam activating agent to the gas is 1:10, the atomized low-foam activating agent contacts with the vitamin C wastewater along with bubbles blown out by the bubbler, the contact area can be further enlarged, and the surface activation of the vitamin C wastewater is facilitated. The low-foaming activator is prepared by mixing sodium carbonate, sodium hydroxide, oxidase (L-amino acid oxidase) and deionized water according to the mass ratio of 3:1:2:10, vitamin C is an antioxidant, is easy to dissolve in water, is insoluble in an organic solvent and is stable in an acidic environment, and alkaline substances and the oxidase can damage the stability of the vitamin C.
S2: after bubbling aeration is finished, skimming upper-layer foams of the primary activated wastewater, adjusting the pH value to 10, pumping the primary activated wastewater through the interior of the pulse neutron activator by using a water pump, and enabling the primary activated wastewater to flow in a water flow mannerThe speed is 3m/s, the pulse frequency of the pulse neutron activator is 20KHZ, the distance between a neutron source and the water surface is 1m, and the neutron fluence rate is 2 × 1013n.cm-2.s-1Deeply activating organic matters in the primary activation wastewater by utilizing neutron transfer energy to obtain secondary activation wastewater;
s3: directly introducing the secondary activated wastewater into an electrolytic oxidation reactor for electrolytic oxidation reaction, and adding three-dimensional electrode particles, wherein the volume ratio of the three-dimensional electrode particles to the secondary activated wastewater is 1:5, the diameter of the three-dimensional electrode particles is 1.2cm, the electrolysis time is 15min, the voltage is 7V, and the current density is 30mA/cm2The distance between the polar plates is 25mm, and a pretreated water body is obtained;
the three-dimensional electrode particle comprises the following components in parts by weight: 50 parts of germanium oxide, 50 parts of anthracite, 35 parts of cement powder, 56 parts of silicon dioxide, 45 parts of glass powder, 25 parts of carbon nano tube, 34 parts of colloidal graphite powder, 22 parts of shrimp shell powder, 20 parts of shale powder, 5 parts of activating agent, 6 parts of pore-forming agent and 40 parts of binding agent.
The preparation method of the three-dimensional electrode particle comprises the following steps:
A. mixing germanium oxide, anthracite, cement powder, silicon dioxide, glass powder, shrimp shell powder and shale powder according to the proportion, drying in an oven at 120 ℃, then putting in a mortar for crushing and grinding, and finally sieving by a 60-mesh sieve to obtain mixed dry powder;
B. adding the carbon nano tube, the colloidal graphite powder, the activating agent, the pore-forming agent and the binder in percentage by weight into the mixed dry powder, mixing and stirring uniformly, and extruding raw material balls with the particle size of 1.2 cm;
C. drying the raw material balls in an oven at 120 ℃ for 24 hours to obtain dried raw material balls;
D. and (3) roasting the dried raw material balls in a high-temperature furnace at 250 ℃ for 2h, roasting at 500 ℃ for 40min, finally roasting at 1000 ℃ for 25min, and naturally cooling to room temperature to obtain the three-dimensional electrode particles.
Wherein, the electrolytic oxidation reactor comprises an electrolytic column 1, a water inlet pipe 2, an anode plate 3, a cathode plate 4, a central support 5 and a base 6, the base 6 is arranged at the bottom of the electrolytic column 1, the electrolytic column 1 is divided into a water outlet area 11, an electrolytic area 12 and a sludge settling area 13 from top to bottom in sequence, the right side of the water outlet area 11 is provided with a water outlet 111, the sludge settling area 13 is conical, the bottom of the sludge settling area 13 is provided with a sludge discharge port 131, the central support 5 is arranged at the junction of the sludge settling area 13 and the electrolytic area 12, the water inlet pipe 2 is positioned at the central position of the longitudinal axis of the electrolytic column 1, the lower end of the water inlet pipe 2 is fixed at the central position of the central support 5, the water inlet pipe 2 is provided with a plurality of water inlet holes 21, the outer side of the water inlet pipe 2 is provided with a plurality of inner end notches 22 with equal intervals from top, the anode plate 3 is made of graphite, the cathode plate 4 is made of stainless steel and is of the same number, the anode plate 3 and the cathode plate 4 are of concave structures, the anode plate 3 and the cathode plate 4 are respectively clamped between the inner end notch 22 and the outer end notch 23 in a staggered mode and are respectively connected with the anode and the cathode of an external power supply 7 through leads, an air ring pipe 121 is arranged below the outer side wall of the electrolysis region 12, the air ring pipe 121 is connected with an external aeration device 8, mixed gas is introduced into the electrolysis region 12, the mixed gas is ozone, oxygen and air in a volume ratio of 3:2:1, the ozone can assist in oxidation, and the oxidation efficiency of. The reaction device is easy to disassemble, convenient to clean and maintain and convenient for replacing the electrode. The electrolytic oxidation reactor is also provided with a top cover 9, the top cover 9 is connected with the upper part of the electrolytic column 1 through a sealing thread, the top of the top cover 9 is provided with a central hole 91, the left side and the right side of the central hole 91 are respectively provided with a wire hole 92, the top cover 9 completely covers the water outlet area 11, and the right side of the top cover 9 is provided with a water outlet valve pipe 93 communicated with the water outlet 111.
S4: sampling the pretreated water body to obtain a water quality analysis result of the pretreated water body, and adjusting subsequent biological strengthening process parameters according to the analysis result.
Example 8
This embodiment is substantially the same as embodiment 7 except for the following points:
s2: after the bubbling aeration is finished, the air is aerated,skimming upper-layer foams of the primary activated wastewater, adjusting the pH value to be 4, pumping the primary activated wastewater through a water pump to flow through the interior of a pulse neutron activator, wherein the flow velocity of water is 3m/s, the pulse frequency of the pulse neutron activator is 20KHZ, the distance between a neutron source and the water surface is 1m, and the neutron fluence rate is 2 × 1013n.cm-2.s-1Deeply activating organic matters in the primary activation wastewater by utilizing neutron transfer energy to obtain secondary activation wastewater;
s3: directly introducing the secondary activated wastewater into an electrolytic oxidation reactor for electrolytic oxidation reaction, and adding three-dimensional electrode particles, wherein the volume ratio of the three-dimensional electrode particles to the secondary activated wastewater is 1:5, the diameter of the three-dimensional electrode particles is 1.2cm, the electrolysis time is 15min, the voltage is 7V, and the current density is 40mA/cm2And the distance between the polar plates is 35mm, so that the pretreated water body is obtained.
Example 9
This embodiment is substantially the same as embodiment 7 except for the following points:
s2, skimming upper-layer foams of the primary activated wastewater after bubbling aeration is finished, adjusting the pH value to 7, pumping the primary activated wastewater through a pulse neutron activator by using a water pump, wherein the flow velocity of water is 3m/S, the pulse frequency of the pulse neutron activator is 20KHZ, the distance between a neutron source and the water surface is 1m, and the neutron fluence rate is 2 × 1013n.cm-2.s-1Deeply activating organic matters in the primary activation wastewater by utilizing neutron transfer energy to obtain secondary activation wastewater;
s3: directly introducing the secondary activated wastewater into an electrolytic oxidation reactor for electrolytic oxidation reaction, and adding three-dimensional electrode particles, wherein the volume ratio of the three-dimensional electrode particles to the secondary activated wastewater is 1:5, the diameter of the three-dimensional electrode particles is 1.2cm, the electrolysis time is 15min, the voltage is 7V, and the current density is 50mA/cm2And the distance between the polar plates is 15mm, so as to obtain the pretreated water body.
Analysis of results
(I) establishing an electrolytic oxidation orthogonal experiment
The electrolytic time, the current density, the pH value and the distance between polar plates are taken as influencing factors to reduce the chroma after treatmentThe quantity is a detection index, in terms of L9(34) Orthogonality experiments were performed for examples 1-9. The color of the raw water is 250 times, the COD is 307.6mg/L, the TOC is 81.1mg/L and the BOD is measured by experiments522.3mg/L, BOD5The COD was 0.072. The results of the orthogonal experiment and the results of the range analysis are shown in Table 1.
TABLE 1 results of orthogonal experiments
Analysis of results of (two) orthogonal experiments
As can be seen from the results of the orthogonal experiment (Table 1), the effect of electrolytic oxidation decoloring is obvious, and the chroma is reduced by 183 times at most within 15 min. Meanwhile, the results of the orthogonal experiment are calculated to find that the influence sequence of the four factors on the treatment effect is as follows: time of electrolysis>pH>Current density>And (5) the distance between the polar plates. Comparison K1、K2、K3And obtaining the optimized operation conditions as follows: the electrolysis time is 15min, the pH value is 4, and the current density is 50mA/cm2And the distance between the polar plates is 25 mm.
As can be seen from the results of the orthogonal experiment, the electrode pair wastewater chromaticity removal rate gradually increases with the extension of the reaction time. This is because the concentration of organic matter in the wastewater is high at the initial stage of the reaction, the reaction rate is high, and as the reaction proceeds, if the reaction time is too long, electrolytic reaction products accumulate on the electrode surface, and side reactions increase, which has an inhibitory effect on the removal of color, and the longer the reaction time, the higher the energy consumption.
Orthogonal experiment results show that the decolorizing effect is best when the pH value is 4, which indicates that the organic matter is more favorably decolorized under the acidic condition because the acidic condition is favorable for generating OH and H at the cathode2O2(ii) a But the pH value is too low, hydrogen evolution side reaction can occur, and H is reduced2O2Active sites generated, reduce H2O2The amount of production, and thus the amount of hydroxyl radicals, is reduced, so that the pH cannot be too low.
The larger the current density is, the stronger the decolorizing effect of the electrolytic oxidation reactor is, because the consumed electric energy is increased along with the increase of the current, the reaction driving force is enhanced, the repolarization degree of the ionic electrode in the reactor is enhanced, the number of the working electrodes is increased, the direct oxidation and indirect oxidation speeds of the surface of the electrode are increased, the oxidation degradation rate of organic matters is also increased, and thus macromolecular substances in the wastewater become micromolecules, and the chroma is removed.
(III) water quality index of effluent water pretreated by electrolytic oxidation
Under the optimized operation condition, the effluent is subjected to water quality analysis, and various indexes of the effluent are shown in table 2.
TABLE 2 Water quality index of electrolytic oxidation pretreatment
The chroma of the wastewater after electrolytic oxidation pretreatment is reduced from about 300 times to 150 times, the TOC is not obviously reduced, and about 100mg/L still exists, so that the new discharge standard can not be met; but BOD5The COD is increased from less than 0.1 to about 0.24, the biodegradability is obviously improved, and good conditions are created for subsequent biological strengthening treatment.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (8)
1. The method for the electrolytic oxidation pretreatment of the vitamin C wastewater is characterized by comprising the following steps of:
s1: introducing the vitamin C wastewater subjected to secondary biochemical treatment into a water storage tank, carrying out bubbling aeration by using a bubbling machine for 15-30min at an aeration flow rate of 40-60m/s, adding a low-foam activating agent in batches for 3-5 times by using an atomizing machine, wherein the total adding dosage of the low-foam activating agent is 8-10g/L, and carrying out surface layer activation on organic matters in the vitamin C wastewater by using the low-foam activating agent to obtain primary activated wastewater; the low-foaming activating agent is formed by mixing sodium carbonate, sodium hydroxide, oxidase and deionized water according to the mass ratio of 3:1:2: 10;
s2, skimming upper-layer foams of the primary activated wastewater after bubbling aeration is finished, adjusting the pH value to 4-10, pumping the primary activated wastewater through a pulse neutron activator by using a water pump, wherein the flow velocity of water is 1-3m/S, the pulse frequency of the pulse neutron activator is 10-20KHz, the distance between a neutron source and the water surface is 0.5-1m, and the neutron fluence rate is 1 × 1013-2×1013n.cm- 2.s-1Deeply activating organic matters in the primary activation wastewater by utilizing neutron transfer energy to obtain secondary activation wastewater;
s3: directly introducing the secondary activated wastewater into an electrolytic oxidation reactor for electrolytic oxidation reaction, and adding three-dimensional electrode particles, wherein the volume ratio of the three-dimensional electrode particles to the secondary activated wastewater is 1:3-5, the diameter of the three-dimensional electrode particles is 0.8-1.2cm, the electrolysis time is 5-15min, the voltage is 3-7V, and the current density is 30-50mA/cm2The distance between the polar plates is 15-35mm, and a pretreated water body is obtained;
s4: sampling the pretreated water body to obtain a water quality analysis result of the pretreated water body, and adjusting subsequent biological strengthening process parameters according to the analysis result.
2. The method for pretreating vitamin C wastewater by electrolytic oxidation according to claim 1, wherein a mist outlet pipe of the atomizer is connected with an air outlet pipe of the bubbling machine in S1, the atomizer atomizes the low-foam activating agent and then sends the low-foam activating agent into the air outlet pipe through the mist outlet pipe, the atomized low-foam activating agent is carried into the vitamin C wastewater by gas blown into the air outlet pipe, and the flow rate ratio of the atomized low-foam activating agent to the gas is 1: 8-10.
3. The method for the electrolytic oxidation pretreatment of vitamin C wastewater as claimed in claim 1, wherein said oxidase is any one or a combination of more of urate oxidase, D-amino acid oxidase, L-amino acid oxidase and L-alpha-hydroxy acid oxidase.
4. The method for the electrolytic oxidation pretreatment of vitamin C wastewater as claimed in claim 1, wherein said three-dimensional electrode particles in S3 comprise the following components by weight: 20-50 parts of germanium oxide, 30-50 parts of anthracite, 25-35 parts of cement powder, 38-56 parts of silicon dioxide, 20-45 parts of glass powder, 15-25 parts of carbon nano tube, 18-34 parts of colloidal graphite powder, 13-22 parts of shrimp shell powder, 10-20 parts of shale powder, 3-5 parts of activating agent, 4-6 parts of pore-forming agent and 30-40 parts of binder.
5. The vitamin C wastewater electrolytic oxidation pretreatment method according to claim 1, wherein in S3 the electrolytic oxidation reactor comprises an electrolytic column (1), a water inlet pipe (2), an anode plate (3), a cathode plate (4), a central support (5) and a base (6), the base (6) is arranged at the bottom of the electrolytic column (1), the electrolytic column (1) is sequentially divided into a water outlet area (11), an electrolytic area (12) and a sludge settling area (13) from top to bottom, the right side of the water outlet area (11) is provided with a water outlet (111), the sludge settling area (13) is conical, the bottom of the sludge settling area (13) is provided with a sludge discharge port (131), the central support (5) is arranged at the junction of the sludge settling area (13) and the electrolytic area (12), the water inlet pipe (2) is located at the central position of the longitudinal axis of the electrolytic column (1), and the lower end of the water inlet pipe (2) is fixed at the central position of the central support (5), be equipped with a plurality of inlet openings (21) on inlet tube (2), a plurality of inner notch (22) of equidistant are equipped with from last to down in inlet tube (2) outside, inner notch (22) become radial around inlet tube (2), are equipped with outer end notch (23) with inner notch (22) one-to-one on the inside wall in electrolysis district (12), anode plate (3), negative plate (4) figure are the same, crisscross joint is between corresponding inner notch (22) and outer end notch (23) respectively to positive negative pole through wire and external power source (7) links to each other respectively, and the lateral wall below in electrolysis district (12) is equipped with air ring pipe (121), air ring pipe (121) link to each other with outside aeration equipment (8), lets in the mist in electrolysis district (12).
6. The vitamin C wastewater electrolytic oxidation pretreatment method according to claim 5, wherein the electrolytic oxidation reactor is further provided with a top cover (9), the top cover (9) is connected with the upper part of the electrolysis column (1) through a sealing thread, the top of the top cover (9) is provided with a central hole (91), the left side and the right side of the central hole (91) are respectively provided with a wire guide hole (92), the top cover (9) completely covers the water outlet area (11), and the right side of the top cover (9) is provided with a water outlet valve pipe (93) communicated with the water outlet (111).
7. The method for the electrolytic oxidation pretreatment of vitamin C wastewater, according to claim 5, wherein the mixed gas is ozone, oxygen and air in a volume ratio of 3:2: 1.
8. The method for the electrolytic oxidation pretreatment of vitamin C wastewater according to claim 5, wherein the anode plate (3) is graphite with a concave structure, and the cathode plate (4) is stainless steel with a concave structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711112293.2A CN108033625B (en) | 2017-11-13 | 2017-11-13 | Electrolytic oxidation pretreatment method for vitamin C wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711112293.2A CN108033625B (en) | 2017-11-13 | 2017-11-13 | Electrolytic oxidation pretreatment method for vitamin C wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108033625A CN108033625A (en) | 2018-05-15 |
| CN108033625B true CN108033625B (en) | 2020-09-29 |
Family
ID=62093584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711112293.2A Active CN108033625B (en) | 2017-11-13 | 2017-11-13 | Electrolytic oxidation pretreatment method for vitamin C wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108033625B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108726801B (en) * | 2018-06-05 | 2021-02-23 | 南京大学 | Industrial advanced treatment method for vitamin C wastewater |
| CN108840448B (en) * | 2018-06-29 | 2021-03-23 | 博瑞威生物化工（沧州）有限公司 | Method for treating D-type amino acid-containing wastewater by using recombinant yeast |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3020104A1 (en) * | 1980-05-27 | 1981-12-03 | Merck Patent Gmbh, 6100 Darmstadt | METHOD FOR PRODUCING DIACETONE KETOGULONIC ACID |
| CN1077697A (en) * | 1992-04-16 | 1993-10-27 | 中国科学院新疆化学研究所 | Process for sewage disposal from wool dyeing and printing by electrolyzation-catalytic oxidation |
| CN101870532A (en) * | 2009-04-24 | 2010-10-27 | 汉纽木股份有限公司 | Electrolytic water purifier capable of automatically controlling applied voltage based on water inflow change |
| CN102060357B (en) * | 2010-12-07 | 2012-11-28 | 南京大学 | High salinity wastewater electrolytic oxidation treatment device |
| CN102964017A (en) * | 2012-06-07 | 2013-03-13 | 刘风鸣 | Method for treatment of high salinity organic wastewater through microwave electrocatalytic oxidation |
-
2017
- 2017-11-13 CN CN201711112293.2A patent/CN108033625B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3020104A1 (en) * | 1980-05-27 | 1981-12-03 | Merck Patent Gmbh, 6100 Darmstadt | METHOD FOR PRODUCING DIACETONE KETOGULONIC ACID |
| CN1077697A (en) * | 1992-04-16 | 1993-10-27 | 中国科学院新疆化学研究所 | Process for sewage disposal from wool dyeing and printing by electrolyzation-catalytic oxidation |
| CN101870532A (en) * | 2009-04-24 | 2010-10-27 | 汉纽木股份有限公司 | Electrolytic water purifier capable of automatically controlling applied voltage based on water inflow change |
| CN102060357B (en) * | 2010-12-07 | 2012-11-28 | 南京大学 | High salinity wastewater electrolytic oxidation treatment device |
| CN102964017A (en) * | 2012-06-07 | 2013-03-13 | 刘风鸣 | Method for treatment of high salinity organic wastewater through microwave electrocatalytic oxidation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108033625A (en) | 2018-05-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102701496B (en) | Process for treating high-concentration degradation-resistant organic wastewater | |
| CN102936072B (en) | Nano-catalysis, electrolysis, flocculation and air-floatation device | |
| CN207645869U (en) | A kind of pharmaceutical wastewater apparatus for electrochemical treatment | |
| CN108033625B (en) | Electrolytic oxidation pretreatment method for vitamin C wastewater | |
| CN105923739B (en) | A kind of method and device of dielectric barrier discharge plasma collaboration float stone O3 catalytic oxidation processing poisonous organic wastewater | |
| CN108314287A (en) | Sludge dewatering decrement method | |
| CN110282705A (en) | A kind of novel pipe electricity Fenton oxidation reaction unit | |
| CN103754994A (en) | Glow discharge plasma water treatment method and device | |
| CN104071873A (en) | Fixed bed three-dimensional electrocatalytic oxidation wastewater reactor | |
| CN103936208A (en) | Efficient micro-electrolysis multiphase flow air flotation reactor | |
| CN110357226A (en) | A kind of method of Electrocatalytic Oxidation processing Polyester wastewater | |
| CN206692392U (en) | A kind of wet wall discharge plasma synergy ozone aeration type wastewater treatment equipment | |
| CN113698008A (en) | Organic matter decomposition equipment based on paper mill waste water treatment | |
| CN204779245U (en) | A microorganism electrolytic bath - sweet smell joint processing apparatus for handling furniture waste water | |
| CN203128267U (en) | Device for super-gravity reinforcing mass transfer process of wastewater treatment through electro-Fenton method | |
| CN106219728B (en) | A kind of method of high efficiency dispersion atomization synergy ozone processing waste water | |
| CN104986904B (en) | Ozone microbubble reacts sewage disposal device and method | |
| CN104944697B (en) | Microbial electrolysis cell-Fenton combined treatment device and process for treating furniture production wastewater | |
| CN109650617B (en) | Integrated control combined treatment process and device for aquaculture wastewater | |
| WO2023236541A1 (en) | Plasma catalytic oxidation treatment device and wastewater treatment method thereof | |
| CN209193747U (en) | A kind of pair of cis-butenedioic anhydride sewage handle and the system of by-product fuel gas | |
| CN110642340A (en) | Circulating flow type electric-assisted ozone water treatment equipment and method for treating water by using same | |
| CN103145277B (en) | Device and process for mass transfer process for treating wastewater through supergravity enhanced electric Fenton method | |
| CN106495411B (en) | Wastewater treatment ICBB technique and device in ginkgo biloba p.e extraction process | |
| CN108773944A (en) | Adsorb the method that electro-catalysis combination handles low dense organic wastewater with difficult degradation thereby |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |