Novel three-pond two-dam for aquaculture tail water treatment and use method of novel three-pond two-dam

Abstract

The invention provides a novel three-pond two-dam for aquaculture tail water treatment and a using method thereof.The novel three-pond two-dam comprises a sedimentation pond, an aeration pond, an ecological purification pond and two filtering dams clamped among the three ponds, a plurality of filtering modules are arranged in the ecological purification pond, and the two filtering dams are arranged in the aeration pond. The filtering module is provided with a plant layer, a sponge medium soil layer, a coarse sand layer, a blind pipe layer, a gravel layer and a sandstone pure soil layer, and the blind pipe is communicated with the water outlet channel through a drainage pipe; the blind pipe layer is formed by laying blind pipes attached with microorganisms. The blind pipes are domesticated through microorganisms, the novel three-pond two-dam tail water treatment system is constructed, aquaculture tail water is subjected to ecological treatment, the tail water treatment effect is improved, utilization of the aquaculture tail water is promoted, the aquaculture tail water treatment technology is improved, construction is convenient, the combination degree with existing three ponds and two dams is high, and high popularization value is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of aquaculture tail water treatment, and in particular to a novel three-pond two-dam system for aquaculture tail water treatment and a use method thereof. Background Art

[0002] Aquaculture tailwater refers to water in which, due to the metabolism and accumulation of excrement, feed residues, drug residues and other substances of fish and other organisms during the aquaculture process, the content of harmful substances such as ammonia nitrogen, nitrite, hydrogen sulfide in the water body increases, the water quality deteriorates, and has adverse effects on farmed organisms.

[0003] Currently, aquaculture tailwater is primarily treated through a three-pond, two-dam tailwater treatment model. This model generally consists of an ecological ditch, sedimentation pond, filter dam, aeration pond, filter dam, and biological purification pond. After progressive sedimentation through the ecological ditch and sedimentation pond, some large particulate matter is removed. The tailwater then passes through the first filter dam to further remove and decompose fine suspended matter. It then enters the aeration pond, where oxidation, volatilization, and decomposition reduce chemical oxygen demand and ammonia nitrogen in the water. Finally, it passes through the second filter dam and enters the ecological pond. By planting aquatic plants and stocking aquatic animals in the biological purification pond, a comprehensive, three-dimensional ecological niche treatment system is established, effectively reducing nitrogen and phosphorus concentrations in the water, ensuring that the water meets discharge standards or is recycled. The "three-pond, two-dam" ecological treatment process has a large water treatment capacity, high technical maturity, and independent separation of inlet and outlet water, which can reduce the spread of waterborne diseases.

[0004] In the three pools and two dams, the aquaculture effluent is treated in a three-dimensional niche in the biological purification pool, but the water that settles to the bottom is more efficiently treated by weakly enhanced microorganisms. Summary of the Invention

[0005] In order to overcome the deficiencies in the prior art, the present invention provides a novel three-pond two-dam system for treating aquaculture tailwater and a method of using the same.

[0006] To achieve the above object, the present invention provides a novel three-pond and two-dam system for aquaculture tailwater treatment, which includes a sedimentation pond, an aeration pond, an ecological purification pond, and two filter dams sandwiched between the three ponds, wherein:

[0007] The ecological purification pool is equipped with multiple filtration modules, each of which is equipped with a plant layer, a sponge medium soil layer, a coarse sand layer, a blind pipe layer, a gravel layer, and a sand and gravel soil layer. The blind pipe is connected to the outlet channel through a drainage pipe.

[0008] The blind pipe layer is made by laying out blind pipes with attached microorganisms.

[0009] Preferably, among the attached microorganisms, the microorganism species are one or more of Pseudomonas putida, Pseudomonas marginalis, Pseudomonas fluorescens, Diaphorobacter sp., and Pseudoxanthomonas mexicana.

[0010] Preferably, the cross-sectional shape of the blind tube includes one or more of a ring shape, a square shape, a three-part internal support shape, and a six-part internal support shape.

[0011] Preferably, the porosity of the blind tube is 60%-90%.

[0012] Preferably, the blind-tube layer includes a first blind-tube layer and a second blind-tube layer.

[0013] Preferably, the blind-pipe layer further includes a third blind-pipe layer, the third blind-pipe layer adopts an annular blind-pipe, and a tubular microporous aeration system is pre-buried below the third blind-pipe layer.

[0014] Preferably, the third blind pipe layer and the pre-buried pipe microporous aeration system are arranged inside the filter dam.

[0015] The beneficial effects of the present invention are as follows:

[0016] The present invention adopts blind pipes domesticated with microorganisms to construct a new three-pond and two-dam tailwater treatment system, which performs ecological treatment on aquaculture tailwater, improves the tailwater treatment effect, promotes the utilization of aquaculture tailwater, and enhances the aquaculture tailwater treatment process technology. It is easy to construct, has a high degree of integration with the existing three-pond and two-dam system, and has high promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of a novel three-tank two-dam tailwater treatment system based on a blind pipe according to the present invention;

[0018] Figure 2 This is a schematic diagram of the filtration module structure of the ecological purification pool in the system of the present invention;

[0019] Figure 3 This is a schematic diagram of the gradient setting of the filtration module of the ecological purification pool in the system of the present invention. DETAILED DESCRIPTION

[0020] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present application will be further described below in conjunction with specific embodiments.

[0021] Example 1: Blind-tube microbial attachment

[0022] The gardening drainage blind pipe is used as a carrier, and the blind pipe has a three-dimensional network structure. In this embodiment, the porosity of the gardening drainage blind pipe is 80%-90%, and the cross section is circular.

[0023] Four bacterial agents were selected, including Pseudomonas putida, Pseudomonas margina lis, Pseudomonas fluorescens, denitrifying bacteria Diaphorobacter sp. and Pseudoxanthomonas mexicana (BaP-23-1), all of which were purchased from Wuhan Huizao Biotechnology Co., Ltd.

[0024] Carry out microbial acclimation and attachment: The water quality of the biofilter inlet is shown in Table 1 below. First, the bacterial agent in the proportion shown in Table 2 is added to the biofilter, and the total live bacteria concentration in the biofilter is 20%. Then the carrier is immersed to carry out microbial acclimation and attachment. The inlet and outlet water control for acclimation and attachment is as follows: on the first day, the inlet and outlet valves are closed, nitrogen is injected to make the dissolved oxygen concentration in the system 0.3-0.8 mg / L, and the inside of the biofilter is micro-aerated for one day; then the inlet and outlet valves are opened, and synthetic water is pumped into the filter with a flow rate of 4.17 ml / min (HRT is 12h), and continuous flow acclimation and cultivation of biofilm is started for 15 days, and detection is carried out every 3 days. When a biofilm is clearly grown on the carrier and the water quality is stable, it indicates that the microbial acclimation and attachment are successful.

[0025] Table 1

[0026] name sodium nitrate Sodium acetate Potassium dihydrogen phosphate magnesium sulfate calcium chloride Concentration (mg / L) 121.4 212.6 5.5 10 40

[0027] After successful microbial acclimation and attachment, the carrier biomass is measured: the blind-tube carrier is carefully removed and gently rinsed several times with deionized water to remove loose surface impurities. The sample is placed in a 1 mol / L NaOH solution and heated in a water bath at 60°C for 30 minutes. After heating in an alkaline solution, it is sonicated at 100W for 30 minutes to remove as much biofilm adhering to the blind-tube as possible. Finally, the biofilm mixture is filtered through a 0.45 μm filter membrane. The filter paper and treated carrier are placed in an oven and dried at 80°C for 30 minutes before being weighed. The biomass attached to the blind-tube per unit mass is calculated by calculating the ratio of the difference in mass before and after filtration to the mass of the blank blind-tube.

[0028] Table 2 Acclimation results of horticultural drainage blind pipes under different microbial ratios

[0029]

[0030] The carriers to which the above-mentioned microorganisms have been successfully domesticated and attached were used to treat aquaculture tail water. The aquaculture tail water used simulated artificial aquaculture tail water (water quality indicators are shown in Table 3 below). The volume of the carrier accounted for 30% of the aquaculture tail water and was placed in an air bath constant temperature oscillator for constant shaking at 30°C. The supernatant was taken at different time points (at 1h and 4h respectively), and the concentrations of TN, TP, nitrate nitrogen (NO3-), nitrite nitrogen (NO2-), ammonia nitrogen (NH3-N) and CODMn were determined using an ultraviolet spectrophotometer.

[0031] Table 3 Water quality indicators of artificial simulated aquaculture tail water

[0032]

[0033] Table 4 Water treatment effect of garden drainage blind pipes under different microbial ratios

[0034]

[0035] Example 2:

[0036] Microorganisms Pseudomonas putida, Pseudomonas marginalis, Pseudomonas fluorescens, Diaphorobacter sp., and Pseudoxanthomonas mexicana (BaP-23-1) were selected in a ratio of 1:2:2:1 to prepare a horticultural drainage blind pipe impregnated with a microbial solution (total viable bacteria concentration of 20%) for microbial cultivation and acclimation. Unlike Example 1, the horticultural drainage blind pipe had a porosity of 60%-90% and was manufactured in various cross-sectional shapes (with the same cross-sectional area) as needed.

[0037] Table 5 Acclimation results of different garden drainage blind pipes

[0038]

[0039] Similar to Example 1, the carrier to which the microorganisms have been successfully domesticated and attached was used to treat aquaculture tail water. The aquaculture tail water used was simulated artificial aquaculture tail water, and the volume of the carrier accounted for 30% of the aquaculture tail water.

[0040] Table 6 Water treatment effects of different garden drainage blind pipes

[0041]

[0042]

[0043] Example 3: A novel three-tank, two-dam tailwater treatment system based on blind pipes

[0044] like Figure 1 and 2 This embodiment provides a novel three-tank, two-dam tailwater treatment system based on the aforementioned blind pipe. It includes a sedimentation tank, an aeration tank, an ecological purification tank, and two filter dams sandwiched between the three ponds. The tailwater generated by aquaculture will first enter the sedimentation tank for stagnant precipitation to filter out large suspended solids in the water, and then pass through the filter dam before entering the aeration tank for aeration. The aeration tank is equipped with aeration pipes, which, combined with oxygenated aeration, can fully oxidize organic matter in the water. After aeration and oxidation, the pollution level of the tailwater has been significantly reduced. At this point, the tailwater flows through the filter dam into the ecological purification tank.

[0045] In this embodiment, a plurality of gradient-arranged filter modules are provided in the ecological purification pool, with outlet channels between the filter modules. The filter modules are provided with a plant layer, a sponge medium soil layer, a coarse sand layer, a first blind pipe layer, a gravel layer, a second blind pipe layer, and a sand and gravel soil layer from top to bottom. Each blind pipe layer adopts a three-part internal support circular shape, and is attached with microorganisms Pseudomonas putida, Pseudomonas marginalis, Pseudomonas fluorescens, denitrifying bacteria Diaphorobacter sp., and Pseudoxanthomonas mexicana (BaP-23-1).

[0046] Furthermore, a third blind-leg layer is installed on the surface of the outlet channel to receive water from upstream. This third blind-leg layer is arranged in a circular pattern, and a pre-buried microporous aeration system beneath it provides soil consolidation and ventilation for plant growth. Considering the cyclical opening and closing of the filter dam during tailwater treatment, the third blind-leg layer and the pre-buried microporous aeration system can also be independently installed within the filter dam. When cleaning the dam, the microporous aeration system is first opened to aerate the third blind-leg layer and the dam body, achieving effective cleaning.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A novel three-pond two-dam system for aquaculture tailwater treatment, characterized by: It includes sedimentation pond, aeration pond, ecological purification pond and two filter dams sandwiched between these three ponds. The ecological purification pool is equipped with multiple filtration modules, each of which is equipped with a plant layer, a sponge medium soil layer, a coarse sand layer, a blind pipe layer, a gravel layer, and a sand and gravel soil layer. The blind pipe is connected to the outlet channel through a drainage pipe. The blind pipe layer is made by laying out blind pipes with attached microorganisms.

2. The novel three-pond two-dam system for aquaculture tailwater treatment according to claim 1 is characterized in that: Among the attached microorganisms, the microorganism species are one or more of Pseudomonas putida, Pseudomonas marginalis, Pseudomonas fluorescens, Diaphorobacter sp., and Pseudoxanthomonas mexicana.

3. The novel three-pond two-dam system for aquaculture tailwater treatment according to claim 1 is characterized in that: The cross-sectional shape of the blind tube includes one or more of a ring shape, a square shape, a three-part internal support shape, and a six-part internal support shape.

4. The novel three-pond two-dam system for aquaculture tailwater treatment according to claim 1 is characterized in that: The porosity of the blind tube is 60%-90%.

5. The novel three-pond two-dam system for aquaculture tailwater treatment according to claim 1 is characterized in that: The blind-tube layer includes a first blind-tube layer and a second blind-tube layer.

6. The novel three-pond two-dam system for aquaculture tailwater treatment according to claim 1 is characterized in that: The blind pipe layer also includes a third blind pipe layer. The third blind pipe layer adopts an annular blind pipe, and a tubular microporous aeration system is pre-buried below the third blind pipe layer.

7. The novel three-pond two-dam system for aquaculture tailwater treatment according to claim 6, characterized in that: The third blind pipe layer and the pre-buried pipe type microporous aeration system are arranged on the inner side of the filter dam.

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