Bullfrog breeding tail water circulation purification system
By classifying and treating the wastewater from bullfrog farming using a wastewater recycling and purification system, and utilizing equipment such as vortex sedimentation tanks, fiber disc filters, ecological pretreatment tanks, and algae purification tanks, the system has solved the problem of low wastewater treatment efficiency in bullfrog farming, achieving efficient purification and resource utilization, and realizing the effects of water reuse and environmental protection.
Patent Information
- Application Number
- CN202423263824.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing methods for treating wastewater from bullfrog farming are inefficient and ineffective, failing to properly treat wastewater from different stages of farming, resulting in severe water pollution.
Shallow and deep water circulation devices are used to treat bullfrog farming wastewater separately. Combined with a vortex sedimentation tank, fiber disc filter, ecological pretreatment tank, bacteria and algae purification tank and reuse treatment tank, the wastewater is classified and purified through mechanical filtration, ecological pretreatment, microfiltration and bacteria and algae purification technology.
It improves the treatment efficiency of bullfrog farming wastewater, with 80% of the wastewater being recyclable. The purified water meets high standards, reducing environmental pollution and achieving water conservation and sludge resource utilization.
Smart Images
Figure CN223780097U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to bullfrog breeding technical field, concretely relates to a bullfrog breeding tail water circulation purification system. BACKGROUND
[0002] Bullfrog can adapt to high-density breeding, and the unit area yield is high, and the yield per mu can reach 15t~40t. The water consumption of shallow water breeding mode is small, and the water level is 5cm~8cm. Compared with fish, shrimp, chicken and pig, the utilization rate of feed phosphorus of bullfrog is higher, and the utilization rate of feed nitrogen is equivalent to fish, shrimp and chicken. According to the data such as feed composition and feed-meat ratio of each breeding variety, the amount of total nitrogen and total phosphorus discharged to the outside world per production of 1kg product can be calculated, and according to the data, the phosphorus discharge of bullfrog is the lowest, and the nitrogen discharge is slightly higher than pig, lower than shrimp, fish and chicken. Therefore, the nitrogen and phosphorus discharged in the process of unit weight bullfrog breeding are less, and bullfrog belongs to the breeding species of water saving and energy saving. But due to the high unit area breeding density of bullfrog and the small water consumption, the nitrogen and phosphorus concentration in the bullfrog breeding tail water is higher than that of other aquatic animals, and unlike terrestrial breeding species, the bullfrog excrement is directly discharged into the water, and is not easy to separate.
[0003] The pollutants contained in aquaculture tail water mainly come from residual bait, excretion and other excretion, which are rich in nitrogen, phosphorus and organic matter, and can aggravate the water eutrophication degree and water pollution of adjacent water area. At the same time, the water pollution of aquaculture has its unique characteristics, that is, the content of potential pollutants is low, the amount of once drainage is large, and there is difference from other common sewage treatment, and the nitrogen and phosphorus nutrients, dissolved organic matter, suspended matter and pathogen in the breeding tail water are the key points of treatment.
[0004] The existing bullfrog breeding tail water is not treated according to the different breeding periods, the treatment efficiency is low, and the effect is poor. UTILITY MODEL CONTENT
[0005] The utility model solves the technical problem that: provide a kind of bullfrog breeding tail water circulation purification system with high treatment efficiency and good treatment effect.
[0006] In order to solve the above technical problem, the technical scheme that the utility model adopts is as follows: provide a kind of bullfrog breeding tail water circulation purification system, including shallow water circulating device and deep water circulating device;
[0007] The shallow water circulating device includes shallow water breeding pond, cyclone sand trap, fiber rotary disc filter, ecological pretreatment pond, bacteria-algae purification pond and reuse treatment pond in water circulation connection;
[0008] The deep water circulating device includes deep water breeding pond, microfilter, bacteria-algae purification pond and reuse treatment pond in water circulation connection.
[0009] Further, the bullfrog breeding tail water recycling purification system further comprises a water storage pool, which is communicated with the shallow water breeding pool and the deep water breeding pool respectively, and the recycling treatment pool is communicated with the water storage pool.
[0010] Further, in the bullfrog breeding tail water recycling purification system, the ecological pretreatment pool is provided with a submerged push-flow pump and mixed bacteria, and the mixed bacteria are used for decomposing macromolecular organic matters in the tadpole tail water filtered by the fiber rotating disc filter to reduce the ammonia nitrogen concentration in the tail water.
[0011] Further, in the bullfrog breeding tail water recycling purification system, the ecological pretreatment pool is further provided with fox tail grass, bitter grass and water floating lotus.
[0012] Further, in the bullfrog breeding tail water recycling purification system, the bacteria-algae purification pool is provided with bacteria and algae, and the bacteria and algae are used for reducing N and P in the tail water and uptaking organic matters.
[0013] Further, in the bullfrog breeding tail water recycling purification system, the bacteria are photosynthetic bacteria, and the algae are chlorella.
[0014] Further, in the bullfrog breeding tail water recycling purification system, the bacteria-algae purification pool is provided with a microporous aeration pipe at the bottom.
[0015] Further, in the bullfrog breeding tail water recycling purification system, the bacteria-algae purification pool is provided with a surge type oxygenation machine.
[0016] The bullfrog breeding tail water recycling purification system has the advantages that the wastewater in different stages of bullfrog breeding is treated separately, the treatment efficiency is improved, and better treatment effect is obtained. The deep water breeding pool is mainly used for breeding tadpoles, the tail water quality is good, and the recycling treatment adopts the process of "microfiltration + bacteria-algae micro-ecological recycling purification". The shallow water breeding area is mainly used for breeding four legs of bullfrogs and adult frogs, and the tail water contains a large amount of suspended matters such as residual feed and feces, and the water pollution concentration is large. After the tail water is discharged, the tail water is first pretreated, the solid matters in the tail water are mechanically filtered by adopting a cyclone sand separator + fiber filter, and the tail water is preliminarily purified by adopting the ecological pretreatment mode of aquatic plants and animals. The effluent is combined with the tail water of the deep water breeding area for recycling and treatment to meet the discharge standard. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 FIG. 1 is a structure schematic view of a bullfrog breeding tail water recycling purification system according to an embodiment of the present application;
[0018] Figure 2 FIG. 2 is a tail water treatment flow chart of the bullfrog breeding tail water recycling purification system according to the embodiment 1 of the present application.
[0019] Explanation of reference numerals:
[0020] 1, water storage pool; 2, shallow aquaculture pool; 3, deep aquaculture pool; 4, cyclone grit chamber; 5, fiber rotary disc filter; 6, ecological pretreatment pool; 7, microfilter; 8, bacteria-algae purification pool; 9, reuse treatment pool;
[0021] 10, external discharge treatment pool; 11, sedimentation tank; 12, first biomass flocculant preparation barrel;
[0022] 13, bacteria-algae expansion field; 14, algal culture pool; 15, various bacteria culture barrels;
[0023] 16, air floatation machine; 17, second biomass flocculant preparation barrel; 18, sludge collection pool; 19, plate-and-frame filter press. DETAILED DESCRIPTION
[0024] To explain the technical content, purposes and effects of the present application in detail, the following will be described in combination with the embodiments and the accompanying drawings.
[0025] The main idea of the bullfrog aquaculture tail water recycling purification system of the present application is:
[0026] (1) The deep aquaculture pool mainly breeds tadpoles, and the tail water quality is good. The recycling reuse treatment adopts the process of "microfilter filtration + bacteria-algae microecological recycling purification".
[0027] (2) The shallow aquaculture area mainly breeds bullfrog four legs and adult frogs. The tail water contains a large amount of suspended matter such as residual feed and feces, and the water quality pollutant concentration is large. After the tail water is discharged, it is first pretreated. The cyclone sand chamber + fiber filter is used to mechanically filter the solid matter in the tail water, and the ecological pretreatment method of aquatic plants and animals is used for preliminary purification. The effluent is combined with the tail water of the deep aquaculture area for recycling reuse and standard discharge treatment.
[0028] The sludge generated in the tail water treatment process is flocculated by using biomass flocculant, and then collected and dewatered by using "air floatation + plate-and-frame filter press", so that the dewatered sludge can be effectively used as fertilizer.
[0029] Example 1
[0030] Please refer to Figure 1 and Figure 2 The present application provides a bullfrog aquaculture tail water recycling purification system, which comprises a shallow water recycling device and a deep water recycling device.
[0031] The shallow water circulating device comprises a shallow water aquaculture pond 2, a cyclone sand settling tank 4, a fiber rotating disc filter 5, an ecological pretreatment tank 6, a bacteria-algae purification tank 8 and a reuse treatment tank 9 in water circulation.
[0032] The deep water circulating device comprises a deep water aquaculture pond 3, a microfiltration machine 7, a bacteria-algae purification tank 8 and a reuse treatment tank 9 in water circulation.
[0033] The bullfrog aquaculture tail water circulating purification system further comprises a water storage tank 1, which is in communication with the shallow water aquaculture pond 2 and the deep water aquaculture pond 3 respectively, and the reuse treatment tank 9 is in communication with the water storage tank 1.
[0034] The ecological pretreatment tank 6 is provided with a submersible flow pump and mixed bacteria, and the mixed bacteria are used to decompose macromolecular organic matters in the frog tail water filtered by the fiber rotating disc filter 5 to reduce the ammonia nitrogen concentration in the tail water. The ecological pretreatment tank 6 is further provided with foxtail grass, Vallisneria and water lily. The bacteria-algae purification tank 8 is provided with bacteria and algae, which are used to reduce N, P and organic matters in the tail water. The bacteria are photosynthetic bacteria, and the algae are chlorella. The bacteria-algae purification tank 8 is provided with a microporous aeration pipe at the bottom. The bacteria-algae purification tank 8 is provided with a surge type oxygenation machine.
[0035] The above bullfrog aquaculture tail water circulating purification system specifically comprises the following settings:
[0036] The tail water discharged from the shallow water aquaculture area (frog pond) and the deep water aquaculture area (tadpole pond) is classified and treated. Since the bullfrog aquaculture tail water is generally weakly acidic, it is first adjusted in pH by a lime suspension liquid to make the tail water weakly alkaline, and the lime can flocculate small particle suspensions and remove part of the dissolved phosphorus pollutants in the tail water in the form of precipitation through chemical reaction.
[0037] The tail water of the shallow water aquaculture area is first subjected to preliminary mud separation by the cyclone sand settling tank 4, and then further enters the fiber rotating disc filter 5 (1500-2000 mesh) to block most of the suspended matters in the tail water, filter the particle suspended matters (mainly residual feed, feces and exuviae in the frog growth process) in the tail water, which is conducive to reducing the slow release of pollutants such as COD and total nitrogen in the suspended matters in the subsequent process treatment. The filtered water enters the bacteria-algae ecological pretreatment tank 6.
[0038] The ecological pretreatment tank 6 is provided with a submersible push-flow pump, and the frog tail water after mechanical filtration is preliminarily purified by periodically and appropriately adding energy heterotrophic / syntrophic mixed bacteria, macromolecular organic matter is decomposed, and the ammonia nitrogen concentration in the tail water is reduced; the ecological floating bed (planting plants such as foxtail grass, cattail, water lily, and hanging biological fillers) is arranged in the tank, the water body is reduced by using the absorption of the root system of aquatic plants, the nitrogen and phosphorus concentrations in the water body are reduced, the plant root system and the biological fillers hung on the floating bed can provide space for microorganisms to adhere, and the utilization rate of the added microorganisms is improved;
[0039] Shrimp and filter-feeding fish are put into the tank, and a small ecological system is established in the ecological pretreatment tank 6 to preliminarily purify the pollutants in the tail water (treatment retention time is 4-5 days). The ecological preliminary purification is carried out through the purification mode of purification bacteria+ aquatic plants+ aquatic animals, the pollutant concentration in the tail water is reduced, the direct impact on the rear end treatment area is reduced, and the tail water of the deep water culture area filtered by the microfilter 7 is introduced into the bacteria-algae purification tank 8.
[0040] The tail water of the deep water culture area is introduced into the microfilter 7 (200 mesh filter screen) after pH adjustment. The insoluble substances in the water are removed through mechanical filtration, the SS in the water is reduced, and the microfiltration water enters the bacteria-algae purification tank 8.
[0041] The bacteria-algae purification tank 8 is provided with a microporous aeration pipe at the bottom, and photosynthetic bacteria and chlorella and other light energy autotrophic microorganisms are added. Through the balance of bacteria and algae in the tank and the synergistic effect of bacteria and algae, the water quality can be purified. The bacteria and algae form a complex symbiotic system by combining the pollutant degradation ability of bacteria and the N, P reduction and organic matter uptake efficiency of algae. The aerobic bacteria degrade carbon-containing organic matter, phosphorus-containing organic matter into water and carbon dioxide, and orthophosphate, and ammonify and nitrify nitrogen-containing organic matter to provide nutrients and carbon sources for algal photosynthesis. At the same time, the oxygen released by algal photosynthesis can promote the metabolism of aerobic bacteria. The algal cells consume a large amount of N, P and other nutrients in the sewage by using light energy as energy, synthesize organic matter from inorganic matter, and purify the tail water (treatment retention time is 3-4 days).
[0042] The bacteria-algae purification tank 8 is provided with a submersible pump, and the reuse water quantity and the discharge water quantity are effectively controlled through the water distribution of the pump.
[0043] The system also provides a bacteria-algae expansion field 13, an algal culture tank 14 and various bacterial culture barrels 15 for supplementing bacteria and algae to the reuse treatment tank 9, the ecological pretreatment tank 6, the reuse treatment tank 9 and the discharge treatment tank 10.
[0044] The tail water in the bacteria-algae purification tank 8 is pumped into the reuse treatment tank 9, and a surge type oxygenator is installed in the tank. The bacteria and algae cultured in the sunlight expansion room are also added and purified, mainly for controlling the concentration of nitrite and ammonia nitrogen in the tail water, and reducing the concentration of pollutants. After the reduction, the tail water is pumped into the water storage tank 1 for breeding reuse (treatment residence time 1.5-2 days).
[0045] When the tail water needs to be discharged, the tail water in the bacteria-algae purification tank 8 is pumped into the discharge treatment tank 10, and a surge type oxygenator is installed in the tank. The added bacteria and algae mainly degrade and purify the organic matter, total nitrogen and total phosphorus in the water (treatment residence time 6-8 days). After treatment, the tail water is stirred and flocculated by the first biomass flocculant preparation barrel 12 before entering the sedimentation tank 11. The microbial flocs collected in the sedimentation tank 11 can be reused in the bacteria-algae purification tank 8 in the previous process. The supernatant meets the discharge standard and is discharged through the standard discharge port.
[0046] During the tail water treatment process, sludge is mainly produced in the front-end filtration link (cyclone sedimentation bottom sludge, fiber rotating disc filter 5 and backwash water of microfiltration machine 7). The sludge is pumped to the sludge treatment area on the shore after collection. After conditioning by the biomass flocculant in the air flotation machine 16 and the second biomass flocculant preparation barrel 17, the sludge is collected in the sludge collection tank 18 after air flotation separation. The dewatered sludge cake is dewatered by the plate and frame filter press 19. The dewatered sludge cake contains a large amount of organic matter and nitrogen and phosphorus substances, which can be used as organic fertilizer for surrounding farmland. The filtrate from the dewatering process flows back to the ecological treatment tank.
[0047] In summary, the above-mentioned bullfrog breeding tail water recycling purification system has the following advantages:
[0048] According to the characteristics of bullfrog breeding wastewater, combined with the breeding process and wastewater composition of bullfrog breeding farm, the pollutant concentration of adult frog breeding tail water (chemical oxygen demand about 150 mg / L, ammonia nitrogen about 15 mg / L, total nitrogen 26 mg / L, total phosphorus 7 mg / L) is higher than that of tadpole breeding tail water (chemical oxygen demand about 50 mg / L, ammonia nitrogen about 4.5 mg / L, total nitrogen 14 mg / L, total phosphorus 2.5 mg / L). A large amount of suspended solids such as leftover feed, feces and molting are contained. The tail water in different stages of bullfrog breeding is treated by classification.
[0049] 80% of the purified tail water can be recycled, the recycled water quality is pH 6-9, ammonia nitrogen is less than or equal to 1 mg / L, nitrite is less than or equal to 0.2 mg / L, and dissolved oxygen is greater than or equal to 5 mg / L, and the remaining tail water quality reaches the first emission standard (pH 6-9, chemical oxygen demand (CODMn) is less than or equal to 10 mg / L, total nitrogen is less than or equal to 3 mg / L, total phosphorus is less than or equal to 0.5 mg / L, and suspended solids are less than or equal to 45 mg / L) of the Aquaculture Tail Water Discharge Standard (DB35 / 2160-2023) of Fujian Province. The water resources can be greatly saved, and the pollution to the surrounding water environment can be reduced.
[0050] 1. The bacteria-algae micro-ecological treatment is used instead of the conventional sewage biochemical treatment, a large amount of aeration is reduced, and the aeration is only used to ensure that the bacteria-algae can be uniformly distributed in the treatment tank, so that the power consumption is reduced. Through photosynthesis, a high content of dissolved oxygen in the aquaculture water body is maintained. The used algae all have chlorophyll a and carotene, and can efficiently perform photosynthesis under the light condition. Since different algae are distributed in different water layers, the purpose of three-dimensional oxygenation can be achieved through photosynthesis.
[0051] 2. Compared with the conventional sewage biochemical treatment, the investment in fixed equipment in the sewage treatment process is reduced, but a large site is needed for water quality purification.
[0052] 3. The amount of biochemical and chemical sludge generated is reduced, and the sludge can be used as agricultural fertilizer for resource utilization.
[0053] 4. The bacteria-algae contained in the recycled aquaculture tail water cooperate in the bullfrog breeding system, have a gain effect, and realize green and healthy breeding of the bullfrog: ①The water body micro-ecological environment balance is regulated, and the pH value is adjusted. The aquaculture water body is made to be alkaline, the material in the pond is promoted to circulate in a benign way, the content of ammonia nitrogen and nitrite is reduced, and the water body is stable; ②A good water color and suitable transparency are created, and the reproduction of bottom filamentous algae, harmful algae and parasites is inhibited; ③Through photosynthesis, the purpose of three-dimensional oxygenation is achieved, and a high content of dissolved oxygen in the aquaculture water body is maintained.
[0054] The above only describes the embodiments of the utility model, and does not limit the patent range of the utility model, and any equivalent transformation or direct or indirect application in the related technical field according to the content of the utility model specification and the drawings is also included in the patent protection range of the utility model.
Claims
1. A bullfrog farming tail water circulation purification system, characterized in that, The device comprises a shallow water circulating device and a deep water circulating device; The shallow water circulating device comprises a shallow water breeding pond, a cyclone grit chamber, a fiber rotating disc filter, an ecological pretreatment pond, a bacteria-algae purification pond and a reuse treatment pond which are in water circulation connection; The deep water circulating device comprises a deep water breeding pond, a microfiltration machine, a bacteria-algae purification pond and a reuse treatment pond.
2. The bullfrog farming tailwater recycling purification system according to claim 1, characterized by, A water storage pond is further included, which is in communication with the shallow water breeding pond and the deep water breeding pond respectively, and the reuse treatment pond is in communication with the water storage pond.
3. The bullfrog farming tailwater recycling purification system according to claim 1, characterized by, A submersible push-flow pump and mixed bacteria are arranged in the ecological pretreatment pond, and the mixed bacteria are used to decompose macromolecular organic matters in the frog tail water filtered by the fiber rotating disc filter to reduce the ammonia nitrogen concentration in the tail water.
4. The bullfrog farming tailwater recycling purification system according to claim 3, characterized by, Fox tail grass, Vallisneria and water lily are further arranged in the ecological pretreatment pond.
5. The bullfrog farming tailwater recycling purification system according to claim 1, characterized by, Bacteria and algae are arranged in the bacteria-algae purification pond, and the bacteria and the algae are used to reduce N and P in the tail water and ingest organic matters.
6. The bullfrog farming tailwater recycling purification system according to claim 5, characterized by, The bacteria are photosynthetic bacteria, and the algae are chlorella.
7. The bullfrog farming tailwater recycling purification system according to claim 5, characterized by, A microporous aeration pipe is arranged at the bottom of the bacteria-algae purification pond.
8. The bullfrog farming tailwater recycling purification system according to claim 1, characterized by, A surge type oxygenation machine is arranged in the bacteria-algae purification pond.