Industrial aquatic product culture wastewater treatment system

Abstract

The utility model provides a factory-like aquatic product culture wastewater treatment system which comprises a water inlet pump, a full-automatic microfilter, a lifting pump, a protein separator, a secondary lifting pump, a denitrification biological filter, an automatic probiotic feeding system, an oxygen enrichment adjusting reactor, a nano aerator, a backwashing water pump, a backwashing fan and a reservoir, the first reservoir, the water pump, the full-automatic microfilter, the second reservoir, the lifting pump, the protein separator, the third reservoir, the secondary lifting pump, the denitrification biological filter and the oxygen-enriched adjusting reactor are sequentially connected through pipelines; the automatic probiotic feeding system is communicated with the denitrification biofilter, and the backwashing water pump and the backwashing fan are communicated with the denitrification biofilter; and the nano aerator is communicated with the oxygen-enriched adjusting reactor. The industrial aquatic product culture wastewater treatment system can reduce the discharge and replacement scale of culture wastewater, promote the recovery and utilization of nutrient substances, and gradually improve and enhance the efficacy of a digestive system and an immune system of aquatic products.

Description

Technical Field

[0001] This utility model relates to wastewater treatment technology, and more particularly to a wastewater treatment system for factory-scale aquaculture. Background Technology

[0002] With the improvement of mariculture technology and the expansion of market demand, marine ecological environment issues have gradually attracted widespread attention. Because the types and quantities of primary producers in aquaculture systems are far from meeting the growth needs of high-density cultured organisms, large amounts of feed, chemicals, biological agents, preventative and therapeutic drugs, and disinfectants are added during the aquaculture process. If aquaculture wastewater is discharged directly into the sea without treatment, the remaining feed, chemical residues, and excrement from cultured organisms rich in nitrogen, phosphorus, organic matter, and toxic substances contained in the wastewater will not only exacerbate eutrophication and water pollution in the adjacent sea areas, leading to nearshore ecosystem imbalances, frequent red tides, and disease outbreaks, but will also gradually increase the drug resistance of pathogens and the pathogenicity of dangerous bacteria and viruses, reduce the immunity of the cultured population, and pose a serious risk of disease outbreaks.

[0003] In fact, in recent years, the total amount of mariculture wastewater discharged into the sea has exceeded that of land-based sewage discharge, which may be one of the important reasons for the frequent occurrence and continuous expansion of harmful red tides. Due to the salinity effect of seawater and the difference between the pollutant structure in mariculture wastewater and common land-based sewage, the treatment of mariculture wastewater is more difficult. Therefore, there are currently few proprietary technologies specifically for the treatment of mariculture wastewater discharge. At present, conventional physical, chemical and biochemical processes are mainly used to treat mariculture wastewater, with the aim of reducing the concentration of substances such as chemical oxygen demand (COD), suspended solids (SS), and ammonia nitrogen in the wastewater, and then recycling it. However, due to poor treatment effects and low economic benefits, the treatment of mariculture wastewater has always been an important factor restricting mariculture. Utility Model Content

[0004] The purpose of this invention is to address the problems of poor treatment effect and low economic benefits of current marine aquaculture wastewater treatment equipment, and to propose a factory-style aquaculture wastewater treatment system. This system can reduce the discharge and replacement scale of aquaculture wastewater, promote the recovery and utilization of nutrients, and gradually improve and enhance the efficiency of the digestive and immune systems of aquatic products. It has the advantages of good treatment effect and good economic benefits.

[0005] It should be noted that, in this utility model, unless otherwise specified, the specific meaning of "comprising" in relation to composition and description includes both open-ended meanings such as "comprising," "including," etc., and closed-ended meanings such as "composed of," "consisting of," etc., and similar meanings.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a factory-scale aquaculture wastewater treatment system, including an inlet pump, a fully automatic microfilter, a booster pump, a protein separator, a secondary booster pump, a denitrification biological filter, an automatic probiotic dosing system, an oxygen-enriched regulating reactor, a nano-aerator, a backwash water pump, a backwash blower, and a water storage tank.

[0007] The reservoir includes three reservoirs: the first reservoir, the second reservoir, and the third reservoir.

[0008] The first water storage tank, water pump, fully automatic microfilter, second water storage tank, lift pump, protein separator, third water storage tank, secondary lift pump, denitrification biological filter and oxygen-enriched regulating reactor are connected sequentially through pipelines;

[0009] The probiotic automatic dispensing system is connected to the denitrification biological filter, and the backwash water pump and backwash blower are connected to the denitrification biological filter; the nano oxygenator is connected to the oxygen-enriched regulating reactor.

[0010] Furthermore, the nano-aerator is connected to the bottom of the oxygen-enriched regulating reactor.

[0011] Furthermore, the denitrifying biological filter has two inlets at the bottom, one inlet at the bottom, and one outlet at the top. The denitrifying aerated biological filter includes a filter tank body, a support layer inside the filter tank body, and filter media on top of the support layer.

[0012] Furthermore, the secondary booster pump is connected to the lower inlet of the denitrification biological filter.

[0013] Furthermore, the upper filtrate outlet of the denitrification biofilter is connected to the top inlet of the oxygen-enriched regulating reactor.

[0014] Furthermore, the backwash water pump and backwash blower are respectively connected to the bottom inlet of the denitrification biological filter.

[0015] The working principle of this industrialized aquaculture wastewater treatment system is as follows:

[0016] Wastewater from aquaculture ponds within the service area (first storage tank) is automatically pumped to a fully automatic microfiltration unit via an inlet pump. This physical filtration removes residual particulate matter from the water. After filtration, the wastewater is temporarily stored in the second storage unit. It is then pumped up to a protein skimmer, where microbubbles adsorb, concentrate, and remove surface-active substances and hydrophobic micro-suspended matter, thus removing residual protein and other toxic substances. After passing through the protein skimmer, the wastewater enters the third storage tank and is further pumped up to a denitrifying biological filter. Simultaneously, an automatic probiotic dosing system adds probiotics to replenish and cultivate beneficial microbial communities in the wastewater, establishing a micro-ecological cycle. In the biological filter, denitrification degrades nitrate and nitrite levels in the wastewater. Furthermore, the oxygen-rich conditions of the aquaculture area, combined with the probiotics, allow for nitrification, degrading ammonia nitrogen and organic matter in the wastewater, thereby maintaining low nitrogen and low carbon levels in the aquaculture water. Wastewater flows by gravity into the oxygen-enriched conditioning tank after passing through the denitrification biological filter. The dissolved oxygen (DO) value is adjusted using a nano-aerator, and the air dosage is adjusted based on the data detected by the DO meter. This not only meets the oxygen requirements of the aquatic organisms but also saves energy loss, avoids unnecessary waste, and reduces operating costs.

[0017] As the denitrifying biological filter operates, the microbial film growing on the filter media gradually thickens, which is beneficial for improving the removal rate. However, when it thickens to a certain extent, the activity of the microorganisms decreases, and some begins to detach. Simultaneously, the oxygen transfer rate decreases, the mass transfer rate slows down, and the head loss increases as the porosity of the filter media decreases. At this point, operation should be stopped and backwashing should be performed. The main backwashing methods are: air washing (backwash blower) → simultaneous air and water backwashing (backwash blower and backwash water pump) → water washing (backwash water pump).

[0018] This utility model relates to the field of environmental governance, and has the following advantages compared with existing technologies:

[0019] This utility model is a wastewater treatment system for industrialized aquaculture, with an environmentally controlled probiotic biological system as its core and integrated equipment as its auxiliary equipment. The system establishes a microbial ecological governance and recycling system for aquaculture, improves the water ecological environment quality of industrialized aquaculture wastewater, reduces the scale of aquaculture wastewater discharge and replacement, promotes the recovery and utilization of nutrients, and can gradually improve and enhance the efficiency of the digestive and immune systems of aquatic products.

[0020] Both physical and biochemical treatment technologies have significant limitations and are difficult to effectively remove pollutants from aquaculture wastewater. This invention combines physical and biochemical treatment technologies to significantly improve the removal effect.

[0021] Filtration and foam separation: During aquaculture, some uneaten feed and a large amount of aquatic animal excrement are produced. This invention selects filtration and foam separation equipment, which can effectively remove sediment and most of the suspended matter.

[0022] Bioaugmentation: This invention utilizes a process for denitrification of nitrates in wastewater. By creating suitable growth conditions, it effectively converts nitrates and nitrites into nitrogen gas to achieve denitrification.

[0023] MPI Environmentally Controlled Probiotic Technology: This invention utilizes MPI environmentally controlled probiotic microbial immobilization technology and probiotic fermentation to prepare nutrient media, which can effectively improve water quality in aquaculture farms and remove organic pollutants. Furthermore, MPI environmentally controlled probiotics can effectively inhibit the growth and reproduction of pathogenic microorganisms in the water. Attached Figure Description

[0024] Figure 1 This is a process flow diagram of the industrialized aquaculture wastewater treatment system of this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the industrialized aquaculture wastewater treatment system of this utility model.

[0026] Among them, 1-inlet pump, 2-fully automatic microfilter, 3-lift pump, 4-protein separator, 5-secondary lift pump, 6-denitrifying biological filter, 7-probiotic automatic dosing system, 8-oxygen-enriched regulating reactor, 9-nano oxygenator, 10-backwash pump, 11-backwash blower, 12-water storage tank. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for mutual communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically limited. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0029] The following disclosure provides many different implementations or examples for carrying out different structures of this application. To simplify the disclosure of this application, the components and arrangements of specific examples are described below. Of course, these are merely examples and are not intended to limit this application.

[0030] Example 1

[0031] This embodiment discloses a wastewater treatment system for factory-scale aquaculture, such as... Figure 1 and 2 As shown, it includes an inlet pump 1, a fully automatic microfilter 2, a booster pump 3, a protein separator 4, a secondary booster pump 5, a denitrification biological filter 6, an automatic probiotic dosing system 7, an oxygen-enriched regulating reactor 8, a nano oxygenator 9, a backwash water pump 10, a backwash blower 11, and a water storage tank 12.

[0032] The water storage tank 12 includes three tanks: a first water storage tank, a second water storage tank, and a third water storage tank. The first water storage tank holds the aquaculture pond wastewater in the service area. The aquaculture wastewater, after being filtered by a fully automatic microfiltration machine, enters the second water storage tank for temporary storage and is then transported to the subsequent equipment. The aquaculture wastewater, after being treated by a protein separator, enters the third water storage tank for temporary storage and is then transported to the subsequent equipment.

[0033] The first water storage tank, water pump 1, fully automatic microfilter 2, second water storage tank, lift pump 3, protein separator 4, third water storage tank, secondary lift pump 5, denitrification biological filter 6 and oxygen-enriched regulating reactor 8 are connected sequentially by pipelines.

[0034] The probiotic automatic dispensing system 7 is connected to the denitrification biological filter 6, the backwash water pump 10 and the backwash blower 11 are connected to the denitrification biological filter 6, and the nano oxygenator 9 is connected to the oxygen-enriched regulating reactor 8.

[0035] Specifically, the nano oxygenator 9 is connected to the bottom of the oxygen-enriched regulating reactor 8.

[0036] The denitrifying biological filter 6 has two inlets at the bottom, one inlet at the lower part, and one outlet at the top. The denitrifying aerated biological filter includes a filter tank body with a support layer inside, and filter media placed on top of the support layer. The secondary lift pump 5 is connected to the lower inlet of the denitrifying biological filter 6. The upper filtrate outlet of the denitrifying biological filter 6 is connected to the top inlet of the oxygen-enriched regulating reactor 8. The backwash water pump 10 and the backwash blower 11 are respectively connected to the bottom inlet of the denitrifying biological filter 6.

[0037] The working principle of the industrialized aquaculture wastewater treatment system is as follows:

[0038] Wastewater from aquaculture ponds (first reservoir) within the service area is automatically pumped to a fully automatic microfiltration machine 2 via inlet pump 1, where residual solid particles are removed through physical filtration.

[0039] After filtration, the wastewater enters the second water storage unit for temporary storage. After being lifted by the booster pump 3, it enters the protein separator 4, where microbubbles adsorb, concentrate, and remove surface active substances and hydrophobic micro suspended solids from the water, thereby removing residual protein and other toxic substances.

[0040] After passing through the protein separator 4, the wastewater enters the third storage tank and is then lifted a second time by the secondary lift pump 5 before entering the denitrification biological filter 6. At the same time, probiotics are added through the automatic probiotic dosing system 7 to supplement and cultivate the beneficial microbial community in the aquaculture wastewater, establishing a micro-ecological cycle system. In the biological filter, the concentration of nitrates and nitrites in the wastewater is degraded through denitrification. Taking advantage of the oxygen-rich conditions in the aquaculture area, the probiotics organically combine with the wastewater to degrade ammonia nitrogen and organic matter in the wastewater through nitrification, thereby maintaining low nitrogen and low carbon levels in the aquaculture water.

[0041] Wastewater flows by gravity into the oxygen-enriched regulating tank 8 after passing through the denitrification biological filter 6. The DO value is adjusted by the nano-aerator 9, and the air dosage is adjusted by the data detected by the DO meter. This not only meets the oxygen requirements of the aquatic organisms, but also saves energy loss, avoids unnecessary waste, and saves operating costs.

[0042] As the denitrifying biological filter 6 operates, the microbial film growing on the filter media gradually thickens, which is beneficial to improving the removal rate. However, when it thickens to a certain extent, the activity of the microorganisms decreases, and some begins to detach. Simultaneously, the oxygen transfer rate decreases, the mass transfer rate slows down, and the head loss increases as the porosity of the filter media decreases. At this point, operation should be stopped and backwashing should be performed. The main backwashing methods are air washing (backwash blower 11) → simultaneous air and water backwashing (backwash blower 11 and backwash water pump 10) → water washing (backwash water pump 10).

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A wastewater treatment system for factory-scale aquaculture, characterized in that, It includes an inlet pump (1), a fully automatic microfilter (2), a booster pump (3), a protein separator (4), a secondary booster pump (5), a denitrifying biological filter (6), an automatic probiotic dosing system (7), an oxygen-enriched regulating reactor (8), a nano oxygenator (9), a backwash pump (10), a backwash blower (11), and a water storage tank (12). The water storage tank (12) includes three tanks, namely the first water storage tank, the second water storage tank and the third water storage tank; The first water storage tank, water pump (1), fully automatic microfilter (2), second water storage tank, booster pump (3), protein separator (4), third water storage tank, secondary booster pump (5), denitrification biological filter (6) and oxygen-enriched regulating reactor (8) are connected sequentially by pipelines; The probiotic automatic dispensing system (7) is connected to the denitrification biological filter (6), the backwash water pump (10) and the backwash blower (11) are connected to the denitrification biological filter (6), and the nano oxygenator (9) is connected to the oxygen-enriched regulating reactor (8).

2. The industrialized aquaculture wastewater treatment system according to claim 1, characterized in that, The nano oxygenator (9) is connected to the bottom of the oxygen-enriched regulating reactor (8).

3. The industrialized aquaculture wastewater treatment system according to claim 1, characterized in that, The denitrifying biological filter (6) has two inlets at the bottom, one inlet at the bottom, and one outlet at the top.

4. The industrialized aquaculture wastewater treatment system according to claim 1 or 3, characterized in that, The secondary booster pump (5) is connected to the lower inlet of the denitrification biological filter (6).

5. The industrialized aquaculture wastewater treatment system according to claim 1 or 3, characterized in that, The upper filtrate outlet of the denitrification biological filter (6) is connected to the top inlet of the oxygen-enriched regulating reactor (8).

6. The industrialized aquaculture wastewater treatment system according to claim 1 or 3, characterized in that, The backwash water pump (10) and backwash blower (11) are respectively connected to the bottom inlet of the denitrification biological filter (6).

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