CN201317710Y - Aquacultural water purifying and recycling system - Google Patents

Abstract

The utility model relates to a water purification circulation system for aquaculture, which relates to water treatment equipment specially suitable for aquaculture containers. The aquaculture water purification circulation system includes a culture pond, and a plant filter, a biological filter and an aeration pond connected in sequence through water pipes; wherein, the water inlet of the plant filter is connected with the outlet of the culture pond, and the oxygenation The outlet of the pond is connected with the water inlet of the culture pond; and, the plant filter is provided with a plant covering 60% of the filter area, the biological filter is provided with a biological purification device, and the aeration pond is provided with an aeration device . Compared with the prior art, the utility model has the advantages of simple setting, short process, easy control, and low cost. Basically, the utility model utilizes physical purification and natural purification mainly based on aquatic plants, has the characteristics of no pollution, and realizes circulation at the same time. The "zero discharge" of aquaculture and aquaculture sewage is suitable for water quality management of aquaculture.

Description

A kind of aquaculture water purification circulation system

【Technical field】

The utility model relates to a water treatment device specially suitable for aquaculture containers.

【Background technique】

The intensive, high-density, and high-yield farming model of aquaculture has increased the output of aquaculture, but due to technical and management reasons, it has brought some problems at the same time: the increase in aquaculture density has greatly increased the metabolites in the water In addition, only about 9.1% and 17.4% of the nitrogen and phosphorus contained in the feed are absorbed and assimilated by the fish, which is far beyond the purification capacity of the aquaculture pond itself, and the self-pollution is becoming more and more serious, which will naturally lead to eutrophication of the aquaculture water body and aging of the farm The occurrence of problems such as diseases and diseases, the frequent occurrence of diseases has brought about the continuous increase of investment in prevention and control drugs (various chemicals and antibiotics), destroying the natural ecological balance of the water environment, resulting in deteriorating water quality, and causing the death of breeding organisms in severe cases , not only restricts the development of aquaculture, but also causes serious environmental pollution. At present, most of the water is changed regularly to achieve the purpose of improving the physical and chemical factors of the water body, but the discharged wastewater not only affects the water quality of the natural water body, but also causes an extreme waste of water resources due to a large number of water changes. my country's water resources are relatively poor, and the purification and recycling of aquaculture wastewater has become a solution to the sustainable development of aquaculture.

【Content of invention】

The utility model aims to provide a water purification circulation system for aquaculture with low energy consumption and high purification efficiency.

The aquaculture water purification circulation system includes a culture pond, and a plant filter, a biological filter and an aeration pond connected in sequence through water pipes; wherein, the water inlet of the plant filter is connected with the outlet of the culture pond, and the oxygenation The outlet of the pond is connected with the water inlet of the culture pond; and the plant filter is provided with a plant covering 60% of the filter area, the biological filter is provided with a biological purification device, and the aeration tank is provided with an aeration device .

The above-mentioned phytofilter is preferably 20m, 1.5m, and 1.5m in length, width, and height, respectively. The height of the plants in the phytofilter is more preferably 18-19 cm.

The above-mentioned biofilter preferably has a length, width and height of 4m, 1m and 3m respectively.

The oxygen increasing device in the above-mentioned oxygen increasing pool is preferably an oxygen increasing machine. More preferably, the length, width and height of the above-mentioned oxygenation pool are respectively 20m×15m×10m. Further preferably, two aeration machines are provided in the above-mentioned aeration pool.

Compared with the prior art, the utility model has the advantages of simple setting, short process, easy control and low cost. Basically, the utility model utilizes physical purification and natural purification mainly based on aquatic plants, has the characteristics of no pollution, and realizes circulation at the same time. The "zero discharge" of aquaculture and aquaculture sewage is suitable for water quality management of aquaculture.

【Description of drawings】

Fig. 1 is the structural representation of the utility model embodiment one;

In the figure, 1-culture pond, 2-plant filter pond, 3-biological filter pond, 4-aeration pond, 5-plant, 6-aeration machine, 7-drainage outlet of the cultivation pond, 8-plant filter pond Water inlet, 9-the outlet of the aeration pool, 10, the water inlet of the breeding pond, arrow-the direction of water flow.

【Detailed ways】

As shown in FIG. 1 , an aquaculture water purification circulation system of the present invention includes a culture pond 1 , a plant filter pond 2 , a biological filter pond 3 and an aeration pond 4 .

Wherein, the water outlet 7 of the cultivation pond is connected with the water inlet 8 of the plant filter, the water outlet of the plant filter is connected with the water outlet of the biofilter, the water outlet of the biofilter 3 is connected with the water inlet of the aeration pool 4, The outlet 9 of the aeration tank is connected with the water inlet 10 of the culture tank, forming a water circulation loop.

The length, width, and height of the plant filter 2 are 20m, 1.5m, and 1.5m respectively; therein, there is a plant 5, the height of which is 18-19cm, and the coverage area is 60% of the filter area.

The length, width and height of the biofilter 3 are 4m, 1m and 3m respectively, in which a biological purification device is provided.

The length, width and height of the oxygenation pool 4 are respectively 20m×15m×10m, in which two aerators 6 are arranged.

When the system is in operation, the waste water produced in the culture pond 1 enters the plant filter 2 through the outlet 7 of the culture pond and the water inlet 8 of the plant filter, stays in the plant filter 2 for a suitable time, and passes through the plants 5 therein. Solid-liquid separation, removal of ammonia nitrogen, nitrite nitrogen, nitrate nitrogen, total nitrogen, total phosphorus and suspended organic matter in wastewater, to obtain preliminary purified water (see Table 1 for the indicators of inflow and outflow water). Then the preliminary purified water enters the biofilter 3 through the outlet of the plant filter and the outlet of the biofilter 3, and is purified again by the biological purification device therein, mainly to remove nitrogen-containing substances such as ammonia nitrogen, nitrite nitrogen, and nitrate nitrogen. organic matter, to obtain secondary purified water. Next, the secondary purified water enters the oxygenation pool 4 through the outlet of the biofilter 3 and the water inlet of the oxygenation pool 4. Due to the effect of the oxygenation machine 6 provided in the oxygenation pool 4, according to the eddy current and hydraulic principles , forming a horizontal circulation, making the entire incoming water body in a saturated state, and obtaining purified oxygen-enriched water. Finally, the oxygen-enriched water returns to the aquaculture pond 1 through the water outlet 9 of the aeration pond and the water inlet 10 of the aquaculture pond to be used for aquaculture again.

Table 1 Removal effect of plant filter on various water quality indicators of aquaculture wastewater

Influent mg/l Preliminary purified water mg/l Removal rate% Ammonia nitrogen 0.731～1.548 0.421～1.154 25.5%～42.4% Nitrite nitrogen 0.061～1.471 0.032～0.903 38.6%～47.5% Nitrate nitrogen 1.42～2.31 1.09～1.86 19.5%～23.2% total nitrogen 2.24～10.12 2.11～9.79 3.30%～5.80% Total Phosphorus 0.066～0.171 0.032～0.103 39.8%～51.5% COD 8.19～8.89 6.446.59 21.4%～25.9%

Claims (7)

1, a kind of aquaculture water decontamination cycle system comprises and cultures pond (1), it is characterized in that also comprising the plant filter tank (2), biological filter (3) and oxygenation pond (4) that connect successively by water pipe; Wherein, the water-in in plant filter tank (8) links to each other with the water port (7) of culturing the pond, and the water port in oxygenation pond (9) links to each other with the water-in (10) of culturing the pond; And being provided with area coverage in plant filter tank (2) is 60% plant (5) of filter tank area, and the biological filter is provided with biological purification plant in (3), and the oxygenation pond is provided with oxygen-increasing device in (4).

2, aquiculture waste water treatment system as claimed in claim 1 is characterized in that described plant filter tank (2) length is respectively 20m, 1.5m, 1.5m.

3, aquiculture waste water treatment system as claimed in claim 2 is characterized in that the height of plant (5) in the plant filter tank (2) is 18-19cm.

4, aquiculture waste water treatment system as claimed in claim 1 or 2 is characterized in that described biological filter (3) length is respectively 4m, 1m, 3m.

5, aquiculture waste water treatment system as claimed in claim 1 or 2 is characterized in that described oxygen-increasing device is oxygenating machine (6).

6, aquiculture waste water treatment system as claimed in claim 5 is characterized in that described oxygenation pond (4) length is respectively 20m * 15m * 10m.

7, aquiculture waste water treatment system as claimed in claim 6 is characterized in that being provided with in the described oxygenation pond (4) two oxygenating machines (6).

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