CN110002644B - Wastewater purification treatment system and treatment method based on electric flocculation technology - Google Patents
Wastewater purification treatment system and treatment method based on electric flocculation technology Download PDFInfo
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- 238000005516 engineering process Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 18
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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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- 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
- 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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
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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 discloses a wastewater purification treatment system and a treatment method based on an electric flocculation technology, wherein a core structure is an integrated wastewater treatment device, the device is separated into an electrolytic area, a reaction area, an inclined plate sedimentation area and a clear water area which are communicated by a multistage overflow plate and a baffle plate, the electrolytic area comprises a plurality of groups of sacrificial polar plates which are arranged in parallel, destabilization flocculation of pollutants in wastewater under the action of an electric field is realized, the reaction area comprises a coagulant aid dosing structure and an aeration device, the flocculation reaction is mainly promoted, the inclined plate sedimentation area accelerates solid-liquid separation, the obtained clear water enters the clear water area, the clear water area can be subjected to water quality regulator and aeration for water quality regulation to meet the water outlet requirement, fluid flows in an up-and-down baffling mode in each area in the integrated wastewater treatment device, the liquid level of each area is controlled by the height of the corresponding overflow plate, the hydraulic retention time of each area is controlled by the relative positions of the corresponding overflow plate and the baffle plate, and finally the high-efficiency treatment of wastewater is realized.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a wastewater purification treatment system and a wastewater purification treatment method based on an electric flocculation technology, which can be used for purifying wastewater of aquatic or livestock and poultry cultivation.
Background
The world aquatic product and livestock breeding China are large countries, and the aquaculture industry and the livestock breeding industry play an important role in guaranteeing the national grain safety. The aquaculture industry of aquatic products and livestock in China generally adopts a high-density and intensive aquaculture mode, a large amount of excrement and bait residues exist in aquaculture wastewater, the water quality is accelerated to deteriorate under the action of bacterial decomposition, if the aquatic products and the livestock are not timely treated, the growth speed of fishes and the like is slowed down, the disease incidence rate is increased, the quality and the yield of aquaculture products are reduced, and the overall economic benefit of aquaculture is affected. The livestock breeding wastewater mainly contains excrement, residue and pathogenic bacteria, and although the livestock breeding wastewater does not have critical influence on self-breeding products, the wastewater is discharged into external water to reduce dissolved oxygen, so that the water body is blackened and smelly, the aquatic organisms die, and the water area functions are lost. The aquatic product and livestock breeding wastewater contains a large amount of bacteria and pathogenic bacteria, and has great harm to people and livestock; meanwhile, the water contains N, P and other nutrient elements, which can cause a plurality of environmental pollution problems such as eutrophication and ecological system unbalance. The deterioration of the culture environment has become a key factor for restricting the healthy and sustainable development of the culture industry in China, and the treatment and the reutilization of the culture wastewater are the only way to solve the problem.
The waste pollutants in the aquaculture water body are mainly excrement, biological debris, residual baits, nitrogen and phosphorus compounds generated by decomposition, and organic matters such as proteins. The current culture water purification technology in China mainly comprises the following steps: mechanical filtration, physical and chemical treatments such as ultraviolet and ozone sterilization, and biological treatments. The process needs to be carried out together with other treatment technologies and equipment, which increases the water treatment cost in an intangible way.
The livestock and poultry breeding wastewater mainly comprises excrement and urine, washing water for cleaning houses, floors, equipment and the like, wherein the washing water accounts for a large part, the livestock and poultry breeding wastewater is high-concentration organic wastewater, the water quantity is large, solid and liquid are mixed, separation is difficult, and pathogenic bacteria are contained. The main treatment modes of livestock and poultry raising wastewater comprise a returning treatment mode, a natural treatment mode and an industrial treatment mode, wherein the industrial treatment mode comprises a physical and chemical treatment technology and a biological treatment technology, the land occupation of the former two treatment modes is large, the treatment effect is influenced by environmental factors, the operation and maintenance cost of the industrial mode is high, and meanwhile, the industrial mode is also managed by special technical staff, and the treatment effect of a series of processes is influenced by the high-load pollutant characteristics of the water body.
Therefore, the conventional cultivation wastewater purification cost is high, more manual operation is needed, and finally the working efficiency is low.
Disclosure of Invention
The invention aims to solve the defects of the prior art, and provides a wastewater purification treatment system and a treatment method based on an electric flocculation technology, which can be used for removing suspended matters, algae, bacteria, COD, nitrogen and phosphorus and other pollutants in aquaculture wastewater of aquatic products or livestock and poultry industry, and can realize the recycling of wastewater. Saving water for cultivation, relieving environmental pressure, realizing waste recycling, and having certain environmental benefit and economic benefit.
In order to achieve the above purpose, the high-efficiency purification treatment system based on the electric flocculation technology mainly comprises a wastewater lifting pump, an integrated wastewater treatment device, a power supply and a fan which are connected with each other, wherein the integrated wastewater treatment device is divided into an electrolysis zone, a reaction zone, an inclined plate sedimentation zone, a clear water zone and a water outlet zone.
The output of waste water elevator pump passes through flowmeter, flow control valve and corresponding pipe connection integral type sewage treatment plant's water inlet, and it has electrolytic polar plate to fill in the electrolytic zone, and electrolytic polar plate passes through the cable and links to each other with external power supply, and electrolytic zone passes through electrolytic zone overflow plate and links to each other, and the rivers pass through electrolytic zone overflow plate gets into the reaction zone, set up the charge mouth that leads to the reaction zone on integral type sewage treatment plant's top cap, be equipped with the reaction zone aeration mouth with the reaction zone intercommunication at integral type sewage treatment plant's lateral wall, the side of reaction zone is equipped with the swash plate sedimentation zone baffle that can only send into the swash plate sedimentation zone with reaction zone output from the below, is equipped with the swash plate filler in swash plate sedimentation zone, is equipped with swash plate sedimentation zone overflow plate in swash plate sedimentation zone and clear water interval, and water flow passes through swash plate sedimentation zone overflow plate gets into clear water zone, is equipped with the clear water zone baffle that keeps apart into first clear water zone and second clear water zone in clear water zone, clear water zone's below is the circulation mouth that sets up charge mouth that leads to the reaction zone on integral type sewage treatment plant's top cap, set up the charge mouth that leads to first clear water zone on integral type sewage treatment plant's top cap, the top cap is equipped with the inlet that sets up the clear water zone with the overflow plate and clear water zone between the clear water zone and outlet, clear water zone and outlet opening through the clear water zone.
In order to make aeration more even, the reaction zone aeration port and the clear water zone aeration port of the integrated sewage treatment device are both internally connected with perforated pipes for even aeration, the outside is connected with an aeration fan through a pipeline and a valve, and the corresponding aeration quantity is regulated by regulating the reaction zone air inlet valve and the clear water zone air inlet valve.
In order to make the water inflow more uniform, the water inlet is connected with a water inflow and distribution pipe with more than one water outlet, and the water inflow and distribution pipe is arranged at the bottom position in the electrolysis area.
In order to be used for regularly discharging the mud that the separation obtained in the waste water, all be equipped with in electrolysis district, reaction district, swash plate sedimentation zone and clear water district below and arrange the mud bucket, respectively with electrolysis district mud bucket, solid-liquid separation district mud bucket and clear water district mud bucket representation, and reaction district and swash plate sedimentation zone share one mud bucket, be equipped with the electrolysis district drain that link up with electrolysis district mud bucket in the below of electrolysis district, be equipped with the solid-liquid separation district drain that link up with corresponding solid-liquid separation district mud bucket in the below of reaction district and swash plate sedimentation zone, be equipped with the clear water district drain that link up with corresponding clear water district mud bucket below the clear water district, be equipped with electrolysis district drain valve on the electrolysis district drain, be equipped with solid-liquid separation district drain valve on the solid-liquid separation district drain, be equipped with clear water district drain valve on the clear water district drain.
In order to facilitate the installation, four corners above the integrated sewage treatment device are respectively provided with a lifting lug for lifting the integrated sewage treatment device.
The invention also discloses a high-efficiency purification treatment method based on the electric flocculation technology, which specifically comprises the following steps:
A) The wastewater enters an integrated wastewater treatment device after being lifted by a wastewater lifting pump;
b) The wastewater entering the integrated sewage treatment device firstly enters an electrolysis zone, an electrolysis polar plate in the electrolysis zone releases polar plate metal ions under the action of a pulse electric field provided by a power supply, and a high-activity flocculating agent is generated in situ, and the flocculating agent cooperates with electrochemical reaction under the action of the electric field to realize destabilization flocculation of pollutants;
C) Then the wastewater enters a reaction zone, the destabilized and flocculated wastewater enters the reaction zone, coagulant aid is added into a medicine adding port of the reaction zone to promote further growth of pollutant flocs, air is introduced into an aeration port of the reaction zone to improve dissolved oxygen and promote collision reaction of the flocs;
D) The wastewater after full reaction enters an inclined plate sedimentation zone, and the gravity sedimentation of the wastewater is quickened under the action of inclined plate filler, so that the solid-liquid separation is realized;
E) The clear water after solid-liquid separation enters a clear water area, the water quality is adjusted by adding a medicament into a medicament adding port of the clear water area, aeration and oxygenation treatment are carried out on the water quality by utilizing aeration, then the water is discharged through a water outlet, and the water can be mixed with fresh water to realize the recycling of aquatic products or animal husbandry cultivation.
Further, the material of the electrolytic plate in step B is one or a combination of more of iron, steel, aluminum, and titanium.
The coagulant aid added in the step C is polyacrylamide polymer coagulant aid, and can be one or more of anionic type, cationic type, nonionic type and amphoteric type, and the agent added in the step E is a pH adjusting agent and can be one of sodium hydroxide, hydrochloric acid and sulfuric acid.
The wastewater purification treatment system and method based on the electric flocculation technology have the following advantages:
1) The technology integrates multiple effects of oxidation, reduction, flocculation, sterilization and the like, and can efficiently realize the transformation and destabilization sedimentation effects of multiple pollutants in the treated wastewater;
2) The high-activity flocculant is generated in situ by electric flocculation, so that the addition of an inorganic flocculant and the addition of chloride ions or sulfate ions are avoided, the method is a wastewater treatment technology without secondary pollution truly, the feasibility is provided for recycling after wastewater treatment, and the relative cost is low;
3) Oxygen generated by water electrolysis in the electric flocculation process and gas generated by an aeration system in a process and equipment not only meet the process requirement, but also increase dissolved oxygen in water, and no additional oxygenation equipment is needed when the system is used for yielding water;
4) The sterilization effect of the water discharged by the electric flocculation system is obvious, and the water can be directly used without equipment sterilization treatment in the later period;
5) The sludge collected by the structure treatment can be directly used as fertilizer after dehydration, and resource utilization is carried out;
6) The structure has the advantages of remarkable water-saving property, high efficiency, simplicity, practicability, small occupied area, easy acceptance by vast middle-small-sized breeders in China, great economic benefit and social benefit, relatively low purification cost, no need of manual operation and high working efficiency.
Drawings
FIG. 1 is a schematic diagram of a wastewater purification treatment system based on the electric flocculation technology in example 1.
In the accompanying drawings: the wastewater treatment system comprises a wastewater lifting pump 101, a flow meter 102, a flow regulating valve 103, an integrated wastewater treatment device 104, a power supply 105, a fan 106, an electrolysis zone 1, a reaction zone 2, an inclined plate sedimentation zone 3, a clear water zone 4, a first clear water zone 5, a second clear water zone 6, a water outlet zone 7, a water inlet 8, a water inlet distribution pipe 9, a water inlet distribution hole 10, an electrolysis polar plate 11, an electrolysis zone overflow plate 12, a reaction zone medicine adding port 13, a reaction zone aeration port 14, an inclined plate sedimentation zone baffle 15, an inclined plate packing 16, an inclined plate sedimentation zone overflow plate 17, a clear water zone medicine adding port 18, a clear water zone baffle 19, a clear water zone aeration port 20, a clear water zone overflow plate 21, a water outlet 22, a top cover 23, a reaction zone air inlet valve 24, a clear water zone air inlet valve 25, an electrolysis zone sludge discharge hopper 26, a solid-liquid separation zone sludge discharge hopper 28, an electrolysis zone outlet 29, a solid-liquid separation zone drain 30, a clear water zone drain 31, an electrolysis zone drain valve 32, a solid-liquid separation zone drain 33, a clear water valve 34, a clear water zone drain 35, a lifting lug 35 and a drain 36.
Detailed Description
The invention will be further described with reference to the drawings and examples.
Example 1:
As shown in fig. 1, the wastewater purification treatment system based on the electric flocculation technology provided in this embodiment mainly includes a wastewater lift pump 101, an integrated wastewater treatment device 104, a power supply 105 and a fan 106 which are connected with each other, wherein the integrated wastewater treatment device 104 is divided into an electrolysis zone 1, a reaction zone 2, an inclined plate sedimentation zone 3, a clear water zone 4 and a water outlet zone 7.
In order to make the equipment simpler and further reduce the labor cost, the output end of the wastewater lift pump 101 is connected with the water inlet 8 of the integrated wastewater treatment device 104 through a flowmeter 102, a flow regulating valve 103 and corresponding pipelines, an electrolytic polar plate 11 is filled in the electrolytic zone 1, the electrolytic polar plate 11 is connected with an external power supply 105 through a cable, the electrolytic zone 1 is connected with the reaction zone 2 through an electrolytic zone overflow plate 12, water flows into the reaction zone 2 through the electrolytic zone overflow plate 12, a chemical adding port 13 leading to the reaction zone 2 is arranged on a top cover 23 of the integrated wastewater treatment device 104, a reaction zone aeration port 14 communicated with the reaction zone 2 is arranged on the side wall of the integrated wastewater treatment device 104, an inclined plate sedimentation zone baffle 15 which can only convey the wastewater output by the reaction zone 2 into an inclined plate sedimentation zone 3 from the lower part is arranged on the side edge of the reaction zone 2, the inclined plate sedimentation zone 3 is internally provided with an inclined plate filler 16 which is an inclined plate for solid-liquid separation, an inclined plate sedimentation zone overflow plate 17 is arranged between the inclined plate sedimentation zone 3 and the clear water zone 4, water flows through the inclined plate sedimentation zone overflow plate 17 into the clear water zone 4, the clear water zone 4 is internally provided with a clear water zone baffle 19 which separates the clear water zone 4 into a first clear water zone 5 and a second clear water zone 6, a circulation port 35 is arranged below the clear water zone baffle 19, a chemical adding port 18 which leads to the first clear water zone 5 is arranged on a top cover 23 of the integrated sewage treatment device 104, a clear water zone aeration port 20 which is communicated with the second clear water zone 6 is arranged on the side wall of the integrated sewage treatment device 104, a clear water zone overflow plate 21 is arranged between the second clear water zone 6 and the water outlet zone 7, and water flows into the water outlet zone 7 through the clear water zone overflow plate 21, and a water outlet 22 is arranged at the bottom of the water outlet 7.
In order to make aeration more uniform, the reaction zone aeration port 14 and the clear water zone aeration port 20 of the integrated sewage treatment apparatus 104 are connected with perforated pipes (not shown in the figure) for uniform aeration, and the specific positions of the perforated pipes and the specific structures of the perforated pipes in this embodiment are conventional technical means in the art, so that the aeration blower 106 is connected through pipes and valves outside, and the corresponding aeration amount is adjusted by adjusting the reaction zone air inlet valve 24 and the clear water zone air inlet valve 25, which are not described in detail.
In order to make the water inflow more uniform, the water inlet 8 is connected with a water inflow water distribution pipe 9 with more than one water outlet 10, and the water inflow water distribution pipe 9 is arranged at the bottom position in the electrolysis zone 1.
In order to be used for periodically discharging sludge obtained by separation in wastewater, sludge discharge hoppers are arranged below an electrolysis area 1, a reaction area 2, an inclined plate sedimentation area 3 and a clear water area 4, and are respectively represented by an electrolysis area sludge discharge hopper 26, a solid-liquid separation area sludge discharge hopper 27 and a clear water area sludge discharge hopper 28, wherein the reaction area 2 and the inclined plate sedimentation area 3 share one sludge discharge hopper, an electrolysis area sewage outlet 29 communicated with the electrolysis area sludge discharge hopper 26 is arranged below the electrolysis area 1, a solid-liquid separation area sewage outlet 30 communicated with the corresponding solid-liquid separation area sludge discharge hopper 27 is arranged below the reaction area 2 and the inclined plate sedimentation area 3, a clear water area sewage outlet 31 communicated with the corresponding clear water area sludge discharge hopper 28 is arranged below the clear water area 4, an electrolysis area sewage valve 32 is arranged on the electrolysis area sewage outlet 26, a solid-liquid separation area sewage valve 33 is arranged on the solid-liquid separation area sewage outlet 30, and a clear water area sewage valve 34 is arranged on the clear water area sewage outlet 31.
For easy installation, a lifting lug 36 for lifting the integrated sewage treatment device 104 is provided at each of the four corners above the integrated sewage treatment device 104.
The embodiment also discloses a high-efficiency purification treatment method based on the electric flocculation technology, which specifically comprises the following steps:
A) The wastewater enters an integrated wastewater treatment device 104 after being lifted by a wastewater lifting pump 101;
b) The wastewater entering the integrated sewage treatment device 104 firstly enters an electrolysis zone 1, an electrolysis polar plate 11 in the electrolysis zone 1 releases polar plate metal ions under the action of a pulse electric field provided by a power supply 105, and a high-activity flocculating agent is generated in situ, and the flocculating agent cooperates with electrochemical reaction under the action of the electric field to realize destabilization flocculation of pollutants;
c) Then the wastewater enters a reaction zone 2, the destabilized and flocculated wastewater enters the reaction zone 2, coagulant aid is added into a chemical adding port 13 of the reaction zone to promote further growth of pollutant flocs, and air is introduced into an aeration port 14 of the reaction zone to improve dissolved oxygen and promote collision reaction of the flocs;
D) The wastewater after full reaction enters an inclined plate sedimentation zone 3, and the gravity sedimentation of the wastewater is quickened under the action of an inclined plate filler 16, so that the solid-liquid separation is realized;
e) The clear water after solid-liquid separation enters a clear water zone 4, the water quality is adjusted by adding a medicament into a chemical adding port 18 of the clear water zone, the water quality is subjected to aeration oxygenation treatment by aeration, and then the water is discharged through a water outlet 22, and the water can be mixed with fresh water to realize the recycling of aquaculture or livestock farming.
Further, the material of the electrolytic plate 11 in step B is one or a combination of more of iron, steel, aluminum, titanium.
The coagulant aid added in the step C is polyacrylamide polymer coagulant aid, and can be one or more of anionic type, cationic type, nonionic type and amphoteric type, and the agent added in the step E is a pH adjusting agent and can be one of sodium hydroxide, hydrochloric acid and sulfuric acid.
The polyacrylamide polymer coagulant aid described in this example is a conventional coagulant aid and is commercially available. In this example, the coagulant aid preferably added is an anionic polyacrylamide aid.
In this embodiment, the water quality adjustment in step E mainly adjusts the pH value of the wastewater to meet the water outlet requirement, and a reagent with a certain concentration of aqueous solution can be added into the reagent inlet 18 of the clean water area during the water quality adjustment, and the reagent is mainly hydrochloric acid, sulfuric acid, sodium hydroxide or sodium carbonate.
In this embodiment, the aeration time of the clean water zone 4 and the reaction zone 2 can be adjusted by the heights of the aeration openings and the aeration pipes, the aeration amount is adjusted by the air inlet valve arranged on the corresponding aeration pipe, and the aeration mode in this embodiment adopts a perforated aeration pipe (not shown in the figure), and is a conventional technology, so this is not specifically described.
In this embodiment, solid pollutants rich in nitrogen and phosphorus obtained by separation in the whole process enter a sludge discharge hopper at the bottom of the integrated sewage treatment device 104, and then are periodically discharged by opening a corresponding sewage outlet, and the discharged sludge can be used as crop fertilizer after dehydration, so that recycling is realized.
In this embodiment, the top cover 23 of the integrated treatment device 104 is provided with a reaction area dosing port 13 for dosing coagulant aid, so as to promote further growth of flocculate and form a better flocculation effect, in addition, the outside of the integrated treatment device 104 is provided with a reaction area aeration port 14, and the reaction area aeration port 14 is connected with an aeration fan 106 through an aeration pipe (not shown in the figure) so as to receive the gas blown by the external aeration fan 106, thereby realizing oxygenation of water body, promoting oxidation of ferrous ions (when the used polar plate material is provided with an iron plate), promoting physicochemical reaction of pollutants, inorganic flocculant and high molecular coagulant aid, and improving efficiency of water treatment.
Meanwhile, the inclined plate sedimentation zone 3 in the embodiment is filled with inclined plate filler 16, so that the solid-liquid separation efficiency is improved, the residence time is reduced, and the occupied area of equipment is reduced.
The whole technical characteristic of this embodiment is that corresponding baffle plates and overflow plates are arranged in the corresponding electrolytic zone 1, reaction zone 2, inclined plate sedimentation zone 3 and clear water zone 4, so that fluid is in the form of up-down baffling movement (the specific water flow direction is shown by the arrow in figure 1) in the integrated sewage treatment device 104, the residence time proportion and the liquid level of each zone are adjusted by the positions of the baffle plates and the overflow plates in each zone, finally, an integrated device integrating functions of electrolytic collection, reaction, solid-liquid separation and water quality adjustment is realized, meanwhile, the electrolytic zone is filled by electrolytic polar plates which are separated by a certain distance and are parallel to each other, the pulse electric fields at two ends of the electrolytic polar plates are provided by a power supply 105, the power supply 105 is a pulse direct current power supply, and the current, the voltage and the duty ratio of the power supply can be automatically adjusted according to the operating condition of the device and the water quality parameters of water inlet and outlet, meanwhile, the power supply can periodically reverse the output anode and cathode, so that the uniform consumption of the anode and the cathode in the polar plate is ensured, the reversing period can be 5-60min, preferably 15-30min, therefore, the structure of the embodiment can remove COD, suspended matters, nitrogen and phosphorus and other organic matters in the aquatic product/livestock and poultry breeding wastewater, has the functions of sterilization and algae killing, the aquatic product/livestock and poultry breeding wastewater is clarified after being treated by the process and the equipment, and the recycling requirements in various aspects such as bacteria, algae, dissolved oxygen and the like are met, the aquatic product/livestock and poultry breeding wastewater can be directly mixed with fresh water for recycling in a breeding system, and zero emission of the aquatic product or livestock and poultry breeding wastewater is realized, and the invention mainly comprises a wastewater lifting subsystem and an integrated sewage treatment subsystem, wherein the wastewater lifting subsystem comprises a wastewater lifting pump for water inflow, the integrated sewage treatment subsystem consists of an integrated sewage treatment device, a fan, a power supply and corresponding connecting components, is the core of the invention, the integrated sewage treatment device is isolated into an electrolytic area, a reaction area, an inclined plate sedimentation area and a clear water area which are communicated by a multistage overflow plate and a baffle plate, the electrolytic area comprises a plurality of groups of sacrificial polar plates which are arranged in parallel, the destabilization flocculation effect of wastewater pollutants is realized, the reaction area comprises a coagulant aid dosing structure and an aeration device, and the flocculation reaction is mainly promoted. The inclined plate sedimentation area accelerates solid-liquid separation, the clear water is obtained, and the clear water area comprises a water quality regulator dosing structure and an aeration device and is used for water quality adjustment and aeration oxygenation so as to meet the water outlet requirement. The water flow in the integrated sewage treatment device flows in a baffling mode up and down in sequence in each area, the liquid level of each area is controlled by the height of the corresponding overflow plate, the liquid level of each area is not interfered with each other, the hydraulic retention time of each area is controlled by the relative position of the baffle of the corresponding overflow plate, and the efficient treatment can be realized.
Claims (5)
1. An aquatic products or animal husbandry breed waste water purification treatment system based on electric flocculation technology, its characterized in that: the device mainly comprises a waste water lifting pump (101), an integrated sewage treatment device (104), a power supply (105) and a fan (106) which are connected with each other, wherein the integrated sewage treatment device (104) is divided into an electrolysis zone (1), a reaction zone (2), an inclined plate sedimentation zone (3), a clear water zone (4) and a water outlet zone (7); the output end of the wastewater lifting pump (101) is connected with a water inlet (8) of an integrated wastewater treatment device (104) through a flowmeter (102), a flow regulating valve (103) and corresponding pipelines, an electrolysis polar plate (11) is filled in an electrolysis area (1), the electrolysis polar plate (11) is connected with an external power supply (105) through a cable, the electrolysis polar plate (11) in the electrolysis area (1) releases polar plate metal ions under the action of a pulse electric field provided by the power supply (105), and a high-activity flocculating agent is generated in situ, and the flocculating agent realizes destabilizing flocculation of pollutants in cooperation with an electrochemical reaction under the action of the electric field; the electrolytic zone (1) is connected with the reaction zone (2) through an electrolytic zone overflow plate (12), water flows into the reaction zone (2) through the electrolytic zone overflow plate (12), a chemical adding port (13) leading to the reaction zone (2) is arranged on a top cover (23) of the integrated sewage treatment device (104), a reaction zone aeration port (14) communicated with the reaction zone (2) is arranged on the side wall of the integrated sewage treatment device (104), a sloping plate sedimentation zone baffle (15) capable of only conveying sewage output by the reaction zone (2) into a sloping plate sedimentation zone (3) from the lower part is arranged on the side edge of the reaction zone (2), and sloping plate fillers (16) are arranged in the sloping plate sedimentation zone (3), an inclined plate sedimentation area overflow plate (17) is arranged between the inclined plate sedimentation area (3) and the clear water area (4), water flows into the clear water area (4) through the inclined plate sedimentation area overflow plate (17), a clear water area baffle (19) for separating the clear water area (4) into a first clear water area (5) and a second clear water area (6) is arranged in the clear water area (4), a circulation port (35) is arranged below the clear water area baffle (19), a dosing port (18) leading to the first clear water area (5) is arranged on a top cover (23) of the integrated sewage treatment device (104), a clear water area aeration port (20) communicated with the second clear water area (6) is arranged on the side wall of the integrated sewage treatment device (104), a clear water area overflow plate (21) is arranged between the second clear water area (6) and the water outlet area (7), water flows into the water outlet area (7) through the clear water area overflow plate (21), and a water outlet (22) is arranged at the bottom of the water outlet area (7); the water inlet (8) is connected with a water inlet water distribution pipe (9) with more than one water outlet holes (10), and the water inlet water distribution pipe (9) is arranged at the bottom position in the electrolysis area (1); mud discharging hoppers are arranged below the electrolysis zone (1), the reaction zone (2), the inclined plate sedimentation zone (3) and the clear water zone (4), the mud discharging hoppers are respectively represented by the electrolysis zone mud discharging hoppers (26), the solid-liquid separation zone mud discharging hoppers (27) and the clear water zone mud discharging hoppers (28), the reaction zone (2) and the inclined plate sedimentation zone (3) share one mud discharging hopper, an electrolysis zone drain outlet (29) communicated with the electrolysis zone mud discharging hoppers (26) is arranged below the electrolysis zone (1), a solid-liquid separation zone drain outlet (30) communicated with the corresponding solid-liquid separation zone mud discharging hoppers (27) is arranged below the reaction zone (2) and the inclined plate sedimentation zone (3), a clear water zone drain outlet (31) communicated with the corresponding clear water zone mud discharging hoppers (28) is arranged below the clear water zone (4), an electrolysis area drain valve (32) is arranged on the electrolysis area drain outlet (26), a solid-liquid separation area drain valve (33) is arranged on the solid-liquid separation area drain outlet (30), and a clear water area drain valve (34) is arranged on the clear water area drain outlet (31); four corners above the integrated sewage treatment device (104) are respectively provided with a lifting lug (36) for lifting the integrated sewage treatment device (104).
2. The electric flocculation technology-based aquatic or livestock breeding wastewater purification treatment system according to claim 1, wherein the reaction zone aeration port (14) and the clear water zone aeration port (20) of the integrated sewage treatment device (104) are internally connected with perforated pipes for uniform aeration, the outside is connected with an aeration fan (106) through a pipeline and a valve, and the corresponding aeration amount is regulated by regulating the reaction zone air inlet valve (24) and the clear water zone air inlet valve (25).
3. A method for purifying wastewater in accordance with claim 1, comprising the steps of:
a) The wastewater enters an integrated wastewater treatment device (104) after being lifted by a wastewater lifting pump (101);
B) The wastewater entering the integrated sewage treatment device (104) firstly enters an electrolysis zone (1), an electrolysis polar plate (11) in the electrolysis zone (1) releases polar plate metal ions under the action of a pulse electric field provided by a power supply (105), and a high-activity flocculating agent is generated in situ, and the flocculating agent cooperates with an electrochemical reaction under the action of the electric field to realize destabilization flocculation of pollutants;
C) Then the wastewater enters a reaction zone (2), the destabilized and flocculated wastewater enters the reaction zone (2), coagulant aids are added into a chemical adding port (13) of the reaction zone to promote the further growth of pollutant flocs, and air is introduced into an aeration port (14) of the reaction zone to improve dissolved oxygen and promote the collision reaction of the flocs;
D) The wastewater after full reaction enters an inclined plate sedimentation zone (3), and the gravity sedimentation of the wastewater is quickened under the action of inclined plate filler (16), so that the solid-liquid separation is realized;
E) The clear water after solid-liquid separation enters a clear water area (4), the water quality is adjusted by adding a medicament into a medicament adding port (18) of the clear water area, aeration oxygenation treatment is carried out on the water quality by utilizing aeration, and then the water is discharged through a water outlet (22), and the water can be mixed with fresh water to realize the recycling of aquatic product or livestock farming.
4. A wastewater purification treatment method of a system according to claim 3, characterized in that the material of the electrolytic plate (11) in step B is one or a combination of more of iron, steel, aluminum, titanium.
5. The method for purifying wastewater according to claim 3 or 4, wherein the coagulant aid added in the step C is one or more of an anionic type, a cationic type, a nonionic type and an amphoteric type, and the chemical agent added in the step E is one of a pH adjusting chemical agent, sodium hydroxide, hydrochloric acid and sulfuric acid.
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