CN111153548A - Sewage treatment process based on aquaculture tail water treatment device - Google Patents
Sewage treatment process based on aquaculture tail water treatment device Download PDFInfo
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- CN111153548A CN111153548A CN201911225984.2A CN201911225984A CN111153548A CN 111153548 A CN111153548 A CN 111153548A CN 201911225984 A CN201911225984 A CN 201911225984A CN 111153548 A CN111153548 A CN 111153548A
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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
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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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
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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
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
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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
- C02F7/00—Aeration of stretches of water
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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention discloses a sewage treatment process based on an aquaculture tail water treatment device, which adopts ecological carbon fiber filter filler to replace the traditional mechanical filtration to form a graded and layered reaction area with screening filtration, active interception, diffusion adsorption and partial nitrification and improve the stability of effluent, the aquaculture tail water treatment device is a cuboid integrated device, a clarifying chamber, a three-level sedimentation tank, an oxidation adsorption tank and a membrane bioreactor are respectively arranged in a main body, clarification, biochemical reaction and high-efficiency filtration are integrated into a whole, coagulation sedimentation and oxidation adsorption filtration are better generated, the treatment effect is optimal, the modularized design is adopted, the whole process flow is subjected to modularized treatment production, the later-stage field installation construction cost and workload are reduced, the adaptability is stronger, the personnel establishment and labor intensity are reduced, the automation level of enterprises is improved, the daily maintenance is simple and convenient.
Description
Technical Field
The invention relates to the technical field of aquaculture tail water treatment processes, in particular to a sewage treatment process based on an aquaculture tail water treatment device.
Background
The culture tail water has the typical characteristics of three high, namely the concentration of organic matters is high, namely COD is up to 3000-12000mg/l, ammonia nitrogen is up to 800-2200mg/l, and suspended matter SS exceeds standard by tens of times; the biodegradability is general; the odor is big; the flushing and discharging time is concentrated, and the impact load is large. At present, the treatment methods of the tail water of the aquaculture include the following methods.
The first treatment of returning field and recycling belongs to the most traditional treatment method, has better economy and effectiveness in a short period, returns the culture sewage to the field, serves as a fertilizer for crop growth, prevents the excretion of aquatic products from being discharged, but ignores the medicament added in aquaculture. Therefore, the method can not realize resource utilization of the wastewater, can also damage other nutrient components of the soil, and can also greatly change the soil structure.
The second method is to use physical separation for the treatment of aquaculture tail water, and the physical separation is a solid-liquid separation method commonly used in aquaculture systems. A fixed sieve, a rotary sieve, a vibrating sieve and a sand filter are usually used as filtering equipment, after the culture tail water is filtered by the filtering equipment, solid particles are remained on a screen, and liquid water flows through the screen, so that the impurities are simply removed. The subsequent treatment can be further carried out by a micro-filter, and the impurity removal rate of about 80 percent in the tail water can be achieved. In addition, physical adsorption, sedimentation and foam separation technologies can be used in combination. However, this treatment method has poor removal effect on soluble organic and inorganic substances, TN and TP, and requires a subsequent process for treatment again.
The third is chemical treatment, and there are two chemical separation methods commonly used in freshwater aquaculture wastewater treatment: ozone treatment and flocculation purification. Ozone has strong water activating property, reacts with water and generates oxygen, and ammonia nitrogen, hydrogen sulfide and other substances are synchronously degraded in the process. The flocculating agent contains aluminum salt, calcium hydroxide and other substances, and can promote the mutual combination of ions in the water body to form flocculation groups, settle and separate from the water body, and purify the water. In addition, the treatment can also be carried out by means of ion exchange. However, the chemical treatment is easy to cause secondary pollution, easily damages aquaculture animals and destroys beneficial bacterium population structure.
The fourth is plant treatment, and it is a comparatively common mode to use plant treatment to breed waste water simultaneously, and the mode of its effect is diversified: the organic matters or nutrient elements in the water body are absorbed, enriched and adsorbed by the growth of the water body; the root is attached with microorganisms, and the microorganisms hang membranes and metabolize organic substances. The commonly selected varieties comprise bitter grass, eichhornia crassipes, gracilaria, alternanthera philoxeroides and ryegrass. The removal rate of COD by the aquatic plants can reach more than 80 percent. It is worth noting that in the actual selection process, the problems of variety collocation, putting area, plant harvesting and the like should be noticed.
And finally, the constructed wetland is constructed to purify aquaculture wastewater, so that the constructed wetland has practicability and landscape property, and an integrated agricultural mode of ecological fishery and leisure fishery can be developed and created. The artificial wetland is an integrated ecological system consisting of soil filler, microorganisms and plants. The technology is a combined technology integration, and combines multiple modes of physical filtration, chemical adsorption, plant filtration, microbial metabolism and the like to purify water; in which the required land area is large and the cost is also increased, so an improved technology is urgently needed to solve the problem in the prior art.
Disclosure of Invention
The invention aims to provide a sewage treatment process based on an aquaculture tail water treatment device, which integrates biochemical reaction, coagulating sedimentation and high-efficiency filtration into a whole for treating aquaculture tail water.
In order to achieve the purpose, the invention provides the following technical scheme: a sewage treatment process based on an aquaculture tail water treatment device comprises the following steps:
the method comprises the following steps: pumping the culture tail water into a center barrel of the clarification chamber through a sewage lifting pump, enabling sewage to enter the clarification chamber through the center barrel of the clarification chamber, adding a certain medicament to enable the sewage to perform a coagulating sedimentation reaction, enabling the sewage to be better clarified through the action in an inclined tube after entering the clarification chamber, and enabling the sewage to enter a second stage through an overflow weir;
step two: firstly, sewage reaches a three-stage sedimentation tank through an overflow weir, firstly contacts a stainless steel filter screen filtering layer, carries out primary sedimentation filtration on the sewage through the stainless steel filter screen filtering layer, then carries out secondary sedimentation filtration through a PP cotton filtering layer, finally carries out third-stage sedimentation filtration through a biological filtering layer, and reaches a third stage through a lower communication mode;
step three: in the third stage, the fan continuously performs intermittent aeration on the oxidation adsorption tank to improve the oxygen content in the oxidation adsorption tank, firstly filtered water reaches the oxidation adsorption tank through lower overflow, sewage is subjected to oxidation adsorption filtration through biological activated carbon and ecological carbon fiber filler in sequence, and the sewage subjected to oxidation adsorption filtration enters the final fourth stage;
step four: at first the fan also aerates membrane bioreactor, and the sewage after the oxidation filtration passes through membrane bioreactor simultaneously, utilizes the self priming pump to take out behind degassing unit for sewage can discharge up to standard.
Preferably, the aperture number of the stainless steel filter screen filtering layer in the second step is 150-300 meshes.
Preferably, the aperture of the PP cotton filter layer in the second step is 80-150 meshes.
Preferably, a dosing device is arranged in the clarification chamber at the lower end of the center cylinder of the clarification chamber in the first step.
Preferably, a disinfecting device is connected to the water outlet of the membrane bioreactor in the fourth step.
Compared with the prior art, the invention has the beneficial effects that:
(1) the ecological carbon fiber filter filler is adopted to replace the traditional mechanical filtration, a graded and layered reaction area with the functions of screening filtration, active interception, diffusion adsorption and partial nitrification is formed, and the effluent stability is improved.
(2) The device that adopts is modular design, carries out the modularization with a whole set of process flow and handles production, has reduced later stage on-the-spot installation construction cost and work load, and the adaptability is stronger.
(3) The device integrates clarification, biochemical reaction and high-efficiency filtration, and coagulation precipitation and oxidation adsorption filtration can be better generated, so that the treatment effect can reach the best.
(4) An integrated dosing device is reserved, and can be adjusted in time according to the water quality of inlet and outlet water.
(5) The three-stage sedimentation filter tank and the oxidation adsorption tank are used and can be externally connected with a reflux system, so that the culture wastewater is purified and treated into pollution-free available resources.
(6) The water treatment technology, the automatic control technology and the computer technology are organically integrated to treat the culture tail water, so that the personnel establishment and labor intensity are reduced, the automation level of an enterprise is improved, and the daily maintenance is simple and convenient.
Drawings
FIG. 1 is a schematic view of the working process of the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
In the figure: the device comprises a sewage lifting pump 1, a clarification chamber central cylinder 2, an inclined tube 3, a clarification chamber 4, a three-stage sedimentation tank 5, a stainless steel filter screen filtering layer 6, a PP cotton filtering layer 7, a biological filtering layer 8, an oxidation adsorption tank 9, ecological carbon fiber fillers 10, biological activated carbon 11, a membrane bioreactor 12, a fan 13, an aerator 14, a main body 15 and a dosing device 16.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a sewage treatment process based on an aquaculture tail water treatment device comprises the following steps: the method comprises the following steps: the device system is totally divided into four stages, wherein in the first stage, culture tail water is pumped into a center barrel 2 of a clarification chamber through a sewage lifting pump 1, sewage enters a clarification chamber 4 through the center barrel 2 of the clarification chamber, a certain medicament is added to enable the sewage to carry out coagulation sedimentation reaction, after the sewage enters the clarification chamber 4, the sewage is better clarified through the action of an inclined tube 3, and then the sewage enters the second stage through an overflow weir;
step two: the process of the second stage is finished in a three-stage sedimentation tank 5, firstly, sewage reaches the three-stage sedimentation tank through an overflow weir, firstly, the sewage contacts a stainless steel filter screen filtering layer 6, the sewage is subjected to first-stage sedimentation and filtration through the stainless steel filter screen filtering layer 6, then, the sewage is subjected to second-stage sedimentation and filtration through a PP cotton filtering layer 7, finally, the sewage is subjected to third-stage sedimentation and filtration through a biological filtering layer 8, and the sewage reaches the third stage through a lower communication mode;
step three: the process of the third stage is completed in the oxidation adsorption tank 9, the fan 13 continuously performs intermittent aeration on the oxidation adsorption tank 9 while the third stage is performed, so as to improve the oxygen content in the oxidation adsorption tank 9, the filtered water firstly flows to the oxidation adsorption tank 9 through the lower part, passes through the biological activated carbon 11 and the ecological carbon fiber filler 10 in sequence, performs oxidation adsorption filtration on the sewage, and the sewage after the oxidation adsorption filtration enters the final fourth stage;
step four: the sewage of process in the fourth stage mainly be can discharge up to standard, and at first fan 13 also aerates membrane bioreactor 12, and the sewage after the oxidation filtration passes through membrane bioreactor 12 simultaneously, utilizes the self priming pump to take out behind degassing unit for sewage can discharge up to standard.
As shown in FIG. 2, the structure and connection relationship of the aquaculture tail water treatment device related to the invention are as follows: the main body 15 is a cuboid integrated device, a clarification chamber 4, a three-stage sedimentation tank 5, an oxidation adsorption tank 9 and a membrane bioreactor 12 are respectively arranged inside the main body 15, a sewage lifting pump 1 is connected with the top end of a clarification chamber central cylinder 2, a plurality of inclined pipes 3 are arranged outside the clarification chamber central cylinder 2, the clarification chamber central cylinder 2 and the inclined pipes 3 are both arranged in the clarification chamber 4, a chemical adding device 16 is arranged at the lower end of the clarification chamber central cylinder 2 in the clarification chamber 4, the top end of the clarification chamber 4 is connected with the three-stage sedimentation tank 5 through an overflow weir, a stainless steel filter screen filtering layer 6, a PP cotton filtering layer 7 and a biological filtering layer 8 are sequentially arranged inside the three-stage sedimentation tank 5 from top to bottom, the aperture number of the stainless steel filter screen filtering layer 6 is 150-300 meshes, the aperture of the PP cotton filtering layer 7 is 80-150 meshes, the biological filtering layer 8 at the, the bottom of the oxidation adsorption tank 9 is provided with an aerator 14, the oxidation adsorption tank 9 is divided into an upper space and a lower space by a partition plate, the oxidation adsorption tank 9 is positioned in the upper space and filled with ecological carbon fiber filler 10, the oxidation adsorption tank 9 is positioned in the lower space and provided with a filter layer of biological activated carbon 11, the top end of the oxidation adsorption tank 9 is communicated with a membrane bioreactor 12, a fan 13 is respectively connected with the aerator 14 and the membrane bioreactor 12, and a disinfection device is further connected with the water outlet of the membrane bioreactor 12.
The device for treating the culture tail water is matched with the device and the equipment which needs to be configured are as follows:
the main body 15 is vertically installed in a cuboid shape, the container is made of carbon steel, a clarification chamber central cylinder 2 is arranged in the clarification chamber 4, and a reinforcing lacing wire is arranged in the clarification chamber;
the main body 15 is provided with a vent pipe for venting and dredging the container periodically;
a branch pipe is connected to the main body 15 for backflow control;
the main body 15 is provided with a disinfection device to disinfect the outlet water, so that the water quality is guaranteed to reach the standard.
Three groups of filter layers which are separated from each other are vertically arranged in the three-stage sedimentation filter tank, the first filter layer is a stainless steel mesh filter layer, the pore size of the first filter layer is 150-300 meshes, the second filter layer is a PP cotton filter layer, the pore size of the second filter layer is 80-150 meshes, and the third filter layer is a biological filter layer; the sewage in the culture pond adopts a continuous water inlet and outlet mode, and three-stage sedimentation filtration operation is sequentially carried out through an overflow weir.
Sewage after the third-stage sedimentation and filtration enters an oxidation adsorption tank through the lower part of the oxidation adsorption tank, the oxidation adsorption tank is divided into an upper space and a lower space, a detachable stainless steel fixing frame is arranged along the spaces, and an ecological carbon fiber filler and a biological activated carbon filter layer are filled in the fixing frame; the sewage entering the oxidation adsorption tank sequentially passes through the ecological carbon fiber oxidation filtration and the biological activated carbon adsorption filtration, and the sewage after the oxidation adsorption filtration enters a famous biological reactor.
The modular design is adopted, the whole process flow is subjected to modular processing and is produced into a vertical cuboid structure, the later-stage on-site installation and construction cost and workload are reduced, and the adaptability is stronger.
An integrated dosing device is reserved in the device system, and can be adjusted in time according to the water quality of inlet and outlet water.
The water treatment technology, the automatic control technology and the computer technology are organically integrated to treat the culture tail water, so that the personnel establishment and labor intensity are reduced, the automation level of an enterprise is improved, and the daily maintenance is simple and convenient.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A sewage treatment process based on an aquaculture tail water treatment device is characterized in that: the method comprises the following steps:
the method comprises the following steps: pumping the culture tail water into a center barrel of the clarification chamber through a sewage lifting pump, enabling sewage to enter the clarification chamber through the center barrel of the clarification chamber, adding a certain medicament to enable the sewage to perform a coagulating sedimentation reaction, enabling the sewage to be better clarified through the action in an inclined tube after entering the clarification chamber, and enabling the sewage to enter a second stage through an overflow weir;
step two: firstly, sewage reaches a three-stage sedimentation tank through an overflow weir, firstly contacts a stainless steel filter screen filtering layer, carries out primary sedimentation filtration on the sewage through the stainless steel filter screen filtering layer, then carries out secondary sedimentation filtration through a PP cotton filtering layer, finally carries out third-stage sedimentation filtration through a biological filtering layer, and reaches a third stage through a lower communication mode;
step three: in the third stage, the fan continuously performs intermittent aeration on the oxidation adsorption tank to improve the oxygen content in the oxidation adsorption tank, firstly filtered water reaches the oxidation adsorption tank through lower overflow, sewage is subjected to oxidation adsorption filtration through biological activated carbon and ecological carbon fiber filler in sequence, and the sewage subjected to oxidation adsorption filtration enters the final fourth stage;
step four: at first the fan also aerates membrane bioreactor, and the sewage after the oxidation filtration passes through membrane bioreactor simultaneously, utilizes the self priming pump to take out behind degassing unit for sewage can discharge up to standard.
2. The aquaculture tail water treatment device based sewage treatment process according to claim 1, which is characterized in that: and in the second step, the aperture number of the stainless steel filter screen filtering layer is 150-300 meshes.
3. The aquaculture tail water treatment device based sewage treatment process according to claim 1, which is characterized in that: and in the second step, the aperture of the PP cotton filter layer is 80-150 meshes.
4. The aquaculture tail water treatment device based sewage treatment process according to claim 1, which is characterized in that: and a dosing device is arranged at the lower end of the center cylinder of the clarification chamber in the step one and is positioned in the clarification chamber.
5. The aquaculture tail water treatment device based sewage treatment process according to claim 1, which is characterized in that: and a disinfecting device is connected at the water outlet of the membrane bioreactor in the fourth step.
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| CN201911225984.2A CN111153548A (en) | 2019-12-04 | 2019-12-04 | Sewage treatment process based on aquaculture tail water treatment device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115093056A (en) * | 2022-07-18 | 2022-09-23 | 中农国际农业集团(广东)有限公司 | Aquaculture tail water treatment process |
| CN115594332A (en) * | 2022-09-20 | 2023-01-13 | 吴秋仙（Cn） | Method for treating aquaculture tail water |
| CN116768428A (en) * | 2023-05-22 | 2023-09-19 | 烟台和盛康洁环保科技有限公司 | Cultivation tail water treatment process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115093056A (en) * | 2022-07-18 | 2022-09-23 | 中农国际农业集团(广东)有限公司 | Aquaculture tail water treatment process |
| CN115594332A (en) * | 2022-09-20 | 2023-01-13 | 吴秋仙（Cn） | Method for treating aquaculture tail water |
| CN116768428A (en) * | 2023-05-22 | 2023-09-19 | 烟台和盛康洁环保科技有限公司 | Cultivation tail water treatment process |
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