CN114409204A - Automatic wastewater treatment system and treatment method thereof - Google Patents
Automatic wastewater treatment system and treatment method thereof Download PDFInfo
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- CN114409204A CN114409204A CN202210143980.5A CN202210143980A CN114409204A CN 114409204 A CN114409204 A CN 114409204A CN 202210143980 A CN202210143980 A CN 202210143980A CN 114409204 A CN114409204 A CN 114409204A
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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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
- 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
- C02F1/5281—Installations for water purification using chemical agents
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- 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
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/44—Time
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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
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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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
- C02F2303/00—Specific treatment goals
- C02F2303/24—Separation of coarse particles, e.g. by using sieves or screens
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
Abstract
The application relates to an automatic wastewater treatment system and a treatment method thereof, which are characterized by comprising a grid well, an anaerobic regulating tank, a demulsification coagulation sedimentation tank, an anaerobic tank, an anoxic tank, an aerobic tank, a secondary sedimentation tank, a BFA biological filter and a clear water disinfection tank which are sequentially communicated. After the coarse and fine grid well is adopted to primarily remove larger particle suspended matters, a series of treatment modes such as demulsification coagulation sedimentation chemical treatment, anaerobic degradation, anoxic denitrification, aerobic contact oxidation, BAF biological filtration and the like are sequentially distributed and combined, and finally the sewage treatment device is obtained after the sewage treatment in a clean water tank. The treatment system and the method fully research the characteristics of harmful substances such as organic matters, heavy metals and the like contained in the cosmetic wastewater, fully exert the advantages of various treatment modes, and realize continuous, stable and efficient cyclic treatment process by setting automatic control systems such as the liquid level of the anaerobic adjusting tank, the liquid level of the dosing device, the aeration time and the like.
Description
Technical Field
The application relates to the technical field of wastewater treatment, in particular to an automatic wastewater treatment system and a treatment method thereof.
Background
In China, a plurality of cosmetic production enterprises exist, and the waste water of cosmetics discharged in the production of the enterprises has great pollution. The cosmetic wastewater has the characteristics of high pollutant density, small wastewater amount, complex components, more difficultly biodegradable substances and more toxic and harmful substances, and greatly improves the difficulty of cosmetic wastewater treatment. At present, most of the existing wastewater treatment systems adopt simple measures such as dosing and precipitation, and the requirements on cosmetic wastewater treatment cannot be met. In addition, in the treatment system, the control of the medicament and the discharge of the sludge in the sedimentation tank all need manual operation by workers, so that the intelligence and the practicability of the system are greatly reduced. Moreover, in the wastewater treatment system, the amount of the added reaction agent needs to be manually controlled, but due to the influence of human factors, the wastewater treatment has instability, the effective treatment of wastewater cannot be ensured, and the reliability of wastewater treatment is reduced. The treatment mode has the problems of incomplete wastewater treatment, unstable effluent quality and the like, so that an efficient, automatic, continuous and stable combined treatment process integrating multiple treatment modes is urgently needed, and the cosmetic wastewater is stably treated and discharged after reaching the standard.
Disclosure of Invention
In order to overcome the problems in the related art, the application provides an automatic wastewater treatment system and a treatment method thereof, and the treatment system is an efficient, automatic, continuous and stable combined treatment process integrating multiple treatment modes, so that the cosmetic wastewater is stably treated and discharged up to the standard.
The present application provides in a first aspect an automatic wastewater treatment system comprising: the system comprises a grid well, an anaerobic adjusting tank, a demulsification coagulation sedimentation tank, an anaerobic tank, an anoxic tank, an aerobic tank, a secondary sedimentation tank, a BFA biological filter and a clear water disinfection tank which are sequentially communicated; waste water enters the grid well, and the grid well performs solid-liquid separation on the waste water; anaerobic bacteria are arranged in the anaerobic adjusting tank to remove organic matters in the wastewater; the demulsification coagulating sedimentation tank is provided with a medicament, so that colloids and fine suspended matters in the wastewater are coagulated into flocculating constituents, and the flocculating constituents are separated and removed; anaerobic bacteria are arranged in the anaerobic tank, the anaerobic tank degrades the wastewater flowing out of the demulsification coagulating sedimentation tank, high-molecular organic matters in the wastewater are decomposed into small-molecular organic matters, and the organic matters in the wastewater are removed; denitrifying bacteria are arranged in the anoxic tank, and are used for decomposing carbon-containing organic matters in the wastewater and converting the carbon-containing organic matters into a carbon source; the aerobic tank allows the activated sludge to perform aerobic respiration to decompose organic matters into inorganic matters; the secondary sedimentation tank separates mud from water in the wastewater, clarifies mixed liquor obtained through biological treatment, and simultaneously concentrates sludge in the mixed liquor; the BFA biological filter tank carries out biological filtration treatment on the wastewater passing through the secondary sedimentation tank; and the clear water disinfection tank is used for disinfecting and sterilizing the wastewater passing through the BFA biological filter and discharging the treated wastewater.
Preferably, the device also comprises a sludge concentration tank arranged at the lower ends of the demulsification coagulation sedimentation tank and the secondary sedimentation tank, and the sludge concentration tank is connected with a filter press.
Preferably, the grid well comprises a guide rail, a basket grid, a support and a lifting motor, wherein the guide rail and the lifting motor are arranged on the support, the basket grid is arranged on the guide rail, and the lifting motor drives the basket grid to slide on the guide rail.
Preferably, the demulsification coagulation sedimentation tank is provided with a demulsification coagulation reaction tank and an inclined plate sedimentation tank, the wastewater treated by the demulsification coagulation reaction tank flows into the anaerobic tank, and the sludge precipitated in the inclined plate sedimentation tank enters the sludge concentration tank.
Preferably, the anaerobic tank degrades the wastewater and is provided with degradation processes of a hydrolysis stage, a fermentation stage, an acetogenesis stage and a methane stage.
Preferably, the BAF biofilter is provided with a granular filter material packed bed, an aeration device and a back washing device, is a high-load submerged immobilized biofilm three-phase reactor, and has an activated sludge method and a biofilm method.
Preferably, the demulsification coagulation sedimentation device, the anaerobic tank, the anoxic tank, the aerobic tank and a sludge outlet at the lower end of the secondary sedimentation tank are connected with an inlet of the sludge concentration tank.
Preferably, a clear liquid outlet is formed in the sludge concentration tank, the clear liquid outlet is connected with the anaerobic adjusting tank, and clear liquid flowing out of the sludge concentration tank flows back into the anaerobic adjusting tank through the clear liquid outlet for retreatment.
In a second aspect, the present application provides a method for treating an automatic wastewater treatment system, comprising:
the waste water enters a grid well, and the grid well primarily removes larger particle suspended matters; the wastewater treated by the grid well enters an anaerobic regulating tank, and macromolecular organic matters in the wastewater are primarily degraded and the water quantity is regulated by the anaerobic regulating tank; the wastewater treated by the anaerobic regulating tank enters a demulsification coagulating sedimentation tank, the demulsification coagulating sedimentation tank deeply degrades and flocculates highly-refractory organic matters, sludge enters a sludge concentration tank, and upper-layer liquid enters an anaerobic tank; the anaerobic tank is used for degrading the upper layer liquid, and the treated upper layer liquid enters the anoxic tank; the anoxic tank carries out denitrification treatment on the upper layer liquid, and the treated upper layer liquid enters the aerobic tank; the upper layer liquid in the aerobic tank is in aerobic contact and oxidized, and the oxidized upper layer liquid is subjected to secondary sedimentation in the aerobic tank; the secondary sedimentation tank is used for settling the upper layer liquid, and the settled upper layer liquid enters the BAF biological filter; the BAF biological filter tank carries out biological treatment on the upper layer liquid, and the treated liquid enters a clear water disinfection tank; and the clear water disinfection tank is used for disinfecting and sterilizing the liquid and discharging the liquid after reaching the standard.
Preferably, the sludge concentration tank is used for treating sludge, the treated sludge enters a filter press to be filter-pressed into sludge cakes and dried, and the dried sludge cakes are transported outside; and the filtrate formed by the filter press during filter pressing flows back to the anaerobic regulating tank for retreatment.
The technical scheme provided by the application can comprise the following beneficial effects: after the coarse and fine grid well is adopted to primarily remove larger particle suspended matters, a series of treatment modes such as demulsification coagulation sedimentation chemical treatment, anaerobic degradation, anoxic denitrification, aerobic contact oxidation, BAF biological filtration and the like are sequentially distributed and combined, and finally the sewage treatment device is obtained after the sewage treatment in a clean water tank. The treatment system and the method fully research the characteristics of harmful substances such as organic matters, heavy metals and the like contained in the cosmetic wastewater, fully exert the advantages of various treatment modes, and realize continuous, stable and efficient cyclic treatment process by setting automatic control systems such as the liquid level of the anaerobic adjusting tank, the liquid level of the dosing device, the aeration time and the like.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application, as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.
FIG. 1 is a schematic structural diagram of an automatic wastewater treatment system according to an embodiment of the present application;
fig. 2 is a schematic flow chart illustrating a treatment method of an automatic wastewater treatment system according to an embodiment of the present application.
Detailed Description
Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of an automatic wastewater treatment system according to an embodiment of the present application.
Referring to fig. 1, an automatic wastewater treatment system includes: the system comprises a grid well, an anaerobic adjusting tank, a demulsification coagulation sedimentation tank, an anaerobic tank, an anoxic tank, an aerobic tank, a secondary sedimentation tank, a BFA biological filter and a clear water disinfection tank which are sequentially communicated, and is used for treating waste water generated by producing cosmetics and the like and discharging the treated waste water after reaching the standard.
And enabling the waste water to enter the grid well, and carrying out solid-liquid separation on the waste water by the grid well. The grid well comprises a guide rail, a basket grid, a support and a lifting motor, wherein the guide rail and the lifting motor are arranged on the support, the basket grid is arranged on the guide rail, and the lifting motor drives the basket grid to slide on the guide rail. The grid well separates small suspended matters in the liquid to a large extent, and solid and liquid separation is realized.
And the wastewater enters the anaerobic adjusting tank for stirring and pre-aeration treatment. Anaerobic bacteria are arranged in the anaerobic adjusting tank to remove organic matters in the wastewater. The anaerobic adjusting tank makes full use of the capacity of the adjusting tank, increases anaerobic retention time, and makes use of the action of anaerobic bacteria to hydrolyze, acidify and methanize organic matters, remove the organic matters in wastewater, improve the biodegradability of sewage, and be beneficial to subsequent aerobic treatment.
The demulsification coagulating sedimentation tank is provided with a medicament, so that colloids and fine suspended matters in the wastewater are coagulated into flocculating constituents, and the flocculating constituents are separated and removed. The demulsification coagulating sedimentation tank comprises a demulsification coagulating reaction tank, an inclined plate sedimentation tank, a matched dosing device and a defoaming device, colloids and fine suspended matters in wastewater are coagulated into floccules through dosing of a medicament, then the floccules are separated and removed, the matched dosing device is provided with automatic control, the system is automatically stopped under the condition of water and medicament shortage, an alarm is given to an operator, and the system automatically enters a water-free treatment running state. In this embodiment, the demulsification coagulation sedimentation tank is provided with a demulsification coagulation reaction tank and an inclined plate sedimentation tank, the wastewater treated by the demulsification coagulation reaction tank flows into the anaerobic tank, and the sludge precipitated in the inclined plate sedimentation tank enters the sludge concentration tank.
Anaerobic bacteria are arranged in the anaerobic tank, the anaerobic tank degrades the wastewater flowing out of the demulsification coagulating sedimentation tank, high-molecular organic matters in the wastewater are decomposed into small molecules, and the organic matters in the wastewater are removed. And the effluent of the demulsification coagulation sedimentation tank enters the anaerobic tank, and is subjected to four degradation processes of a hydrolysis stage, a fermentation stage, an acetic acid production stage and a methane stage under the action of anaerobic bacteria. The high molecular organic matters in the wastewater are decomposed into small molecular organic matters, insoluble organic matters are converted into soluble organic matters, the organic matters in the wastewater are removed, the biological load of subsequent biological treatment is reduced, and the biochemical property of the wastewater is improved.
Denitrifying bacteria are arranged in the anoxic tank to decompose carbon-containing organic matters in the wastewater and convert the carbon-containing organic matters into carbon sources. The anoxic tank utilizes denitrifying bacteria in the anoxic tank to convert carbon-containing organic matters which are not decomposed in the sewage into carbon sources. And can also reduce the nitrate radical which enters the anoxic pond by utilizing internal circulation reflux to be N2Thereby effectively releasing. Due to the anoxic pondThe inside of the reactor is subjected to hydrolysis reaction, and the pH value can be increased by using a denitrification process. In addition, the device is matched with the denitrification and dephosphorization of the anoxic tank, and can decompose macromolecular organic particles into micromolecular organic particles, thereby better increasing the biodegradability of wastewater and creating conditions for subsequent biochemistry.
The aerobic tank allows the activated sludge to perform aerobic respiration, and organic matters are decomposed into inorganic matters. The aerobic tank is used for adsorbing and degrading organic matters by using aerobic activated sludge. The activated sludge is subjected to aerobic respiration to further decompose organic matters into inorganic matters. Removing most organic matters such as cod, ammonia nitrogen and the like in the sewage and removing pollutants. In an optional embodiment, the mixed liquid gas in the aerobic tank flows back to the anoxic tank, and the anoxic tank processes the returned mixed liquid gas. The aerobic tank utilizes aerobic microorganisms (including facultative microorganisms) to carry out biological metabolism under the condition of existence of oxygen so as to degrade organic matters, and the organic matters are stabilized and innocent.
And the secondary sedimentation tank separates mud from water in the wastewater, clarifies the mixed liquid after biological treatment and concentrates the sludge in the mixed liquid. The secondary sedimentation tank is used for separating mud and water, clarifying mixed liquid obtained by biologically treating water and concentrating sludge in the mixed liquid. In an alternative embodiment, the sludge gas produced in the secondary sedimentation tank is returned to the anaerobic tank, and the returned sludge gas is treated again in the anaerobic tank.
And the BFA biological filter tank carries out biological filtration treatment on the wastewater passing through the secondary sedimentation tank. In the embodiment, the BAF biofilter mainly comprises a granular filter material (ceramsite) packed bed, an aeration device, a backwashing device and the like, is a high-load submerged immobilized biofilm three-phase reactor, and has the advantages of both an activated sludge method and a biofilm method.
And the clear water disinfection tank is used for disinfecting and sterilizing the wastewater passing through the BFA biological filter and discharging the treated wastewater after reaching the standard. In an optional embodiment, a disinfection device is arranged in the clean water disinfection tank, and the disinfection device detects the water quality of the water in the clean water disinfection tank, controls the disinfection time and the dosage of the disinfectant, and enables the disinfectant to reach the standard and then be discharged.
In an optional embodiment, the demulsification coagulation sedimentation tank and a sludge concentration tank at the lower end of the secondary sedimentation tank are connected with a filter press. In the embodiment, the lower sludge outlets of the demulsification coagulating sedimentation device, the anaerobic tank, the anoxic tank, the aerobic tank and the secondary sedimentation tank are connected with the inlet of the sludge concentration tank.
And a clear liquid outlet is formed in the sludge concentration tank and is connected with the anaerobic adjusting tank, and the clear liquid passing through the sludge concentration tank flows back to the anaerobic adjusting tank through the clear liquid outlet for treatment.
In an optional embodiment, the dosing device is connected with the demulsification coagulation sedimentation tank, the wastewater amount and the wastewater quality of the demulsification coagulation sedimentation tank are monitored, the amount of the added medicament is adjusted, and the dosing is automatically carried out.
In an optional embodiment, the defoaming device is respectively connected with the demulsification coagulation sedimentation tank and the aerobic tank, bubbles generated by chemical reaction in the tanks are eliminated, automatic defoaming is realized, and gas-liquid separation is facilitated.
In an optional embodiment, the fan is respectively connected with the demulsification coagulation sedimentation tank, the anoxic tank, the aerobic tank and the BAF biological filter tank, so that the gas circulation in the tanks is accelerated, the reaction time is shortened, and the retention time of wastewater in each tank is reduced.
Fig. 2 is a schematic flow chart illustrating a treatment method of an automatic wastewater treatment system according to an embodiment of the present application.
Referring to fig. 2, a treatment method of an automatic wastewater treatment system is firstly to adopt a coarse and fine grid well to primarily remove larger particle suspended matters, then to combine a series of treatment modes such as demulsification, coagulation and precipitation chemical treatment, anaerobic degradation, anoxic denitrification, aerobic contact oxidation, BAF biological filtration and the like to be sequentially distributed and combined, and finally to enter a clean water tank for disinfection treatment. The treatment system and the treatment method fully research the characteristics of harmful substances such as organic matters, heavy metals and the like contained in the cosmetic wastewater, fully exert the advantages of various treatment modes, and realize continuous, stable and efficient cyclic treatment process by setting automatic control systems for controlling the liquid level of the anaerobic adjusting tank, the liquid level of the dosing device, the aeration time and the like. The reaction time of the treatment system is short, so that the time for the wastewater to stay in each pool is short, and the treatment system has the characteristic of short hydraulic retention time. In addition, each process step is automatically carried out, automatic monitoring is realized, and manual operation is not needed, so that the whole system needs fewer links of manpower participation when treating wastewater, and the manual operation of the treatment system is simple. In addition, the wastewater of the treatment system is subjected to different chemical reactions in the tanks, so that the sludge is fully reacted, pollutants are removed, and meanwhile, the sludge is compressed and dried in the sludge concentration tank and then is transported outside, so that the sludge yield is low. The treatment system can fully react the wastewater through multiple chemical reactions, and has high chroma removal rate. The treatment system is circularly carried out, the ring is buckled with the ring, the operation cost is low, the occupied area is small, and meanwhile, the energy-saving and environment-friendly effects such as low power consumption are achieved. The treatment system has the advantage of long service life of equipment, and finally the quality of the effluent reaches the standard and is discharged.
The processing method, as shown in fig. 2, specifically includes:
the wastewater enters a grid well which initially removes larger particle suspensions. In this embodiment, cosmetics waste water gets rid of the thick big suspended solid that probably blocks up water pump unit and pipeline valve through the grid well.
The waste water after the grid well is treated enters an anaerobic adjusting tank, and macromolecular organic matters in the waste water are primarily degraded and the water quantity is adjusted by the anaerobic adjusting tank.
And the wastewater treated by the anaerobic regulating tank enters a demulsification coagulating sedimentation tank, the demulsification coagulating sedimentation tank deeply degrades and flocculates high-difficulty degradable organic matters, sludge enters a sludge concentration tank, and the upper-layer liquid enters an anaerobic tank.
And the anaerobic tank is used for degrading the upper layer liquid, and the treated upper layer liquid enters the anoxic tank. The layer liquid enters an anaerobic tank and is subjected to four degradation processes of a hydrolysis stage, a fermentation stage, an acetogenesis stage and a methane stage by anaerobic bacteria in the anaerobic tank.
And the upper layer liquid is subjected to denitrification treatment in the anoxic tank, and the treated upper layer liquid enters the aerobic tank.
And in the aerobic tank, the upper layer liquid is in aerobic contact and oxidized, and the oxidized upper layer liquid is subjected to secondary sedimentation.
And the secondary sedimentation tank is used for settling the upper layer liquid, and the settled upper layer liquid enters the BAF biological filter.
And the BAF biological filter tank carries out biological treatment on the upper layer liquid, and the treated liquid enters the clear water disinfection tank.
And the clear water disinfection tank is used for disinfecting and sterilizing the liquid and discharging the liquid after reaching the standard.
The sludge concentration tank is used for treating sludge, the treated sludge enters a filter press to be filter-pressed into sludge cakes and dried, and the dried sludge cakes are transported outside; and the filtrate formed by the filter press during filter pressing flows back to the anaerobic regulating tank for retreatment.
Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (10)
1. An automatic wastewater treatment system, comprising:
the system comprises a grid well, an anaerobic adjusting tank, a demulsification coagulation sedimentation tank, an anaerobic tank, an anoxic tank, an aerobic tank, a secondary sedimentation tank, a BFA biological filter and a clear water disinfection tank which are sequentially communicated;
waste water enters the grid well, and the grid well performs solid-liquid separation on the waste water;
anaerobic bacteria are arranged in the anaerobic adjusting tank to remove organic matters in the wastewater;
the demulsification coagulating sedimentation tank is provided with a medicament, so that colloids and fine suspended matters in the wastewater are coagulated into flocculating constituents, and the flocculating constituents are separated and removed;
anaerobic bacteria are arranged in the anaerobic tank, the anaerobic tank degrades the wastewater flowing out of the demulsification coagulating sedimentation tank, high-molecular organic matters in the wastewater are decomposed into small-molecular organic matters, and the organic matters in the wastewater are removed;
denitrifying bacteria are arranged in the anoxic tank, and are used for decomposing carbon-containing organic matters in the wastewater and converting the carbon-containing organic matters into a carbon source;
the aerobic tank allows the activated sludge to perform aerobic respiration to decompose organic matters into inorganic matters;
the secondary sedimentation tank separates mud from water in the wastewater, clarifies mixed liquor obtained through biological treatment, and simultaneously concentrates sludge in the mixed liquor;
the BFA biological filter tank carries out biological filtration treatment on the wastewater passing through the secondary sedimentation tank;
and the clear water disinfection tank is used for disinfecting and sterilizing the wastewater passing through the BFA biological filter and discharging the treated wastewater.
2. The automatic wastewater treatment system according to claim 1, characterized in that: the device also comprises a sludge concentration tank arranged at the lower end of the demulsification coagulation sedimentation tank and the secondary sedimentation tank, and the sludge concentration tank is connected with a filter press.
3. The automatic wastewater treatment system according to claim 1, characterized in that: the grid well comprises a guide rail, a basket grid, a support and a lifting motor, wherein the guide rail and the lifting motor are arranged on the support, the basket grid is arranged on the guide rail, and the lifting motor drives the basket grid to slide on the guide rail.
4. The automatic wastewater treatment system according to claim 2, characterized in that: the demulsification coagulation sedimentation tank is provided with a demulsification coagulation reaction tank and an inclined plate sedimentation tank, the wastewater treated by the demulsification coagulation reaction tank flows into the anaerobic tank, and the sludge precipitated in the inclined plate sedimentation tank enters the sludge concentration tank.
5. The automatic wastewater treatment system according to claim 1, characterized in that: the anaerobic tank degrades the wastewater and is provided with a degradation process of a hydrolysis stage, a fermentation stage, an acetic acid production stage and a methane stage.
6. The automatic wastewater treatment system according to claim 1, characterized in that: the BAF biological filter is provided with a granular filter material packed bed, an aeration device and a back washing device, is a high-load submerged immobilized biological membrane three-phase reactor, and has an activated sludge method and a biological membrane method.
7. The automatic wastewater treatment system according to claim 2, characterized in that: and the demulsification coagulation sedimentation device, the anaerobic tank, the anoxic tank, the aerobic tank and a sludge outlet at the lower end of the secondary sedimentation tank are connected with an inlet of the sludge concentration tank.
8. The automatic wastewater treatment system according to claim 2, characterized in that: and a clear liquid outlet is formed in the sludge concentration tank and is connected with the anaerobic adjusting tank, and clear liquid flowing out of the sludge concentration tank flows back into the anaerobic adjusting tank through the clear liquid outlet for retreatment.
9. A treatment method of an automatic wastewater treatment system is characterized by comprising the following steps:
the waste water enters a grid well, and the grid well primarily removes larger particle suspended matters;
the wastewater treated by the grid well enters an anaerobic regulating tank, and macromolecular organic matters in the wastewater are primarily degraded and the water quantity is regulated by the anaerobic regulating tank;
the wastewater treated by the anaerobic regulating tank enters a demulsification coagulating sedimentation tank, the demulsification coagulating sedimentation tank deeply degrades and flocculates highly-refractory organic matters, sludge enters a sludge concentration tank, and upper-layer liquid enters an anaerobic tank;
the anaerobic tank is used for degrading the upper layer liquid, and the treated upper layer liquid enters the anoxic tank;
the anoxic tank carries out denitrification treatment on the upper layer liquid, and the treated upper layer liquid enters the aerobic tank;
the upper layer liquid in the aerobic tank is in aerobic contact and oxidized, and the oxidized upper layer liquid is subjected to secondary sedimentation in the aerobic tank;
the secondary sedimentation tank is used for settling the upper layer liquid, and the settled upper layer liquid enters the BAF biological filter;
the BAF biological filter tank carries out biological treatment on the upper layer liquid, and the treated liquid enters a clear water disinfection tank;
and the clear water disinfection tank is used for disinfecting and sterilizing the liquid and discharging the liquid after reaching the standard.
10. The method for treating an automatic wastewater treatment system according to claim 9, wherein: the sludge concentration tank is used for treating sludge, the treated sludge enters a filter press to be filter-pressed into sludge cakes and dried, and the dried sludge cakes are transported outside; and the filtrate formed by the filter press during filter pressing flows back to the anaerobic regulating tank for retreatment.
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