阅读说明：本技术 一种鱼类养殖尾水除磷的方法和系统 (Method and system for removing phosphorus from fish culture tail water ) 是由 陈石 张业韡 单建军 吴凡 于 2021-08-13 设计创作，主要内容包括：本发明涉及一种鱼类养殖尾水除磷系统,集水池向池体的内壁延伸一将池水完全隔开的隔板；布水板一侧与隔板之间的区域为电解池,电解池采用铝制的一对电极板,电解池内设有气浮装置、明矾试剂添加管、碱液添加管；布水板另一侧与布水槽之间的区域为设有漂浮式的生物处理模块的人工湿地式生物处理池；进水管穿过池体直接与集水池连通；出水口设于池体侧壁之上；电解池的侧壁靠近隔板的部位设有一排污管。本发明具有集成度高、处理效率稳定、能耗低、可用度大等优点,可以同时运用生物、物理和化学的方法进行除磷,不会二次污染水体。(The invention relates to a fish culture tail water dephosphorization system.A water collecting tank extends a partition board which completely separates tank water to the inner wall of a tank body; the area between one side of the water distribution plate and the partition plate is an electrolytic tank, the electrolytic tank adopts a pair of aluminum electrode plates, and an air floatation device, an alum reagent adding pipe and an alkali liquor adding pipe are arranged in the electrolytic tank; the area between the other side of the water distribution plate and the water distribution tank is an artificial wetland type biological treatment tank provided with a floating type biological treatment module; the water inlet pipe penetrates through the pool body and is directly communicated with the water collecting pool; the water outlet is arranged on the side wall of the tank body; a drain pipe is arranged at the part of the side wall of the electrolytic cell, which is close to the clapboard. The invention has the advantages of high integration level, stable treatment efficiency, low energy consumption, high availability and the like, can simultaneously remove phosphorus by biological, physical and chemical methods, and does not secondarily pollute water.)

1. The utility model provides a fish culture tail water dephosphorization system which characterized in that:

comprises a pool body;

the central part of the pool body is provided with a water collecting pool (5), the periphery of the upper edge of the water collecting pool (5) is provided with an annular overflow trough, the upper edge of the overflow trough is higher than the water collecting pool (5), the side surface of the overflow trough is provided with a notch, the notch is connected with one end of the water distribution trough (3), and the other end of the water distribution trough (3) extends to the side wall of the pool body;

two sides of the water distribution tank (3) are provided with saw-toothed guide plates (301);

a serrated water distribution plate (11) extends from one side of the overflow tank opposite to the gap to the edge of the tank body;

the water collecting tank (5) extends a clapboard (12) which completely separates the tank water towards the inner wall of the tank body;

an electrolytic cell (6) is arranged in the area between one side of the water distribution plate (11) and the partition plate (12), the electrolytic cell adopts a pair of aluminum electrode plates, and an air floatation device (7), an alum reagent adding pipe (8) and an alkali liquor adding pipe (9) are arranged in the electrolytic cell;

the area between the other side of the water distribution plate (11) and the water distribution tank (3) is an artificial wetland type biological treatment tank provided with a floating type biological treatment module (2);

the water inlet pipe (1) penetrates through the tank body and is directly communicated with the water collecting tank (5); the water outlet (4) is arranged on the side wall of the tank body;

a drain pipe (10) is arranged on the side wall of the electrolytic cell close to the partition plate (12).

2. The fish culture tail water dephosphorization system of claim 1, wherein: the tank body is cylindrical or round table-shaped, and the water collecting tank (5) is also cylindrical or round table-shaped.

3. The fish culture tail water dephosphorization system of claim 2, wherein: the overflow groove is circular.

4. The fish culture tail water dephosphorization system of claim 2, wherein: the plane view angle of the artificial wetland type biological treatment tank is semicircular.

5. The fish culture tail water dephosphorization system of claim 4, wherein: the plane view angle of the electrolytic cell (6) is in a sector shape of 90 degrees.

6. A method for removing phosphorus from fish culture tail water is characterized by comprising the following steps: the fish culture tail water dephosphorization system adopting any one of the claims 1-5, comprising the following steps:

the culture tail water enters a water collecting tank (5) from a water inlet pipe (1), passes through an overflow tank along with the increase of the culture tail water, enters an artificial wetland type biological treatment tank containing a biological treatment module (2) from a water distribution tank (3), is treated by hydrophilic plants cultured by a floating plate in the biological treatment module (2), and then flows into an electrolytic tank (6) through a water distribution plate (11);

alum is added through a reagent adding pipe (8) while the aluminum electrode is electrolyzed, a floatation device (7) is started to generate flocculated substances, the flocculated substances are gradually accumulated on the partition board (12) at the rear side of the electrolytic cell (6), and are discharged and collected through a discharge pipe (10);

and a sodium bicarbonate water solution is added to the rear side of the electrolytic cell (6) through an alkali liquor adding pipe (9), so that redundant metal ions are removed, the reaction speed is accelerated, and finally treated water is discharged through a water outlet (4).

Technical Field

The invention relates to a method and a system for removing phosphorus from fish culture tail water, and belongs to the technical field of phosphorus removal of culture water.

Background

In recent years, with the rapid development of the aquaculture industry in China, the water quality of increasingly severe natural waters is deteriorated, the ecosystem is unbalanced, red tide water bloom is frequent, diseases are bred, and the development of the aquaculture industry is severely restricted due to the irregular artificial feeding mode and the nonstandard discharge of aquaculture tail water. Because the fish culture tail water has the characteristics of large water quantity, over-concentrated discharge, low concentration, difficult treatment and the like, and phosphorus has obvious toxicity to fish in a certain concentration and time range, the research on phosphorus removal in the tail water has profound significance.

The problems of low treatment capacity, large energy consumption, unstable operation, high maintenance difficulty and the like generally exist in a tail water treatment system for fish culture, and secondary pollution and high manufacturing cost are easily caused.

Disclosure of Invention

The invention aims to provide a method and a system for removing phosphorus from fish culture tail water, which have the advantages of high integration level, stable treatment efficiency, low energy consumption, high availability and the like, can simultaneously remove phosphorus by biological, physical and chemical methods, and cannot secondarily pollute a water body.

The invention adopts the following technical scheme:

a fish culture tail water dephosphorization system comprises a tank body; the central part of the pool body is provided with a water collecting pool 5, the periphery of the upper edge of the water collecting pool 5 is provided with an annular overflow trough with the upper edge higher than the water collecting pool 5, the side surface of the overflow trough is provided with a gap, the gap is connected with one end of a water distribution trough 3, and the other end of the water distribution trough 3 extends to the side wall of the pool body; two sides of the water distribution tank 3 are provided with saw-toothed guide plates 301; a serrated water distribution plate 11 extends from one side of the overflow tank opposite to the gap to the edge of the tank body; the water collecting tank 5 extends a clapboard 12 which separates the water in the tank completely towards the inner wall of the tank body; an electrolytic tank 6 is arranged in the area between one side of the water distribution plate 11 and the partition plate 12, the electrolytic tank adopts a pair of aluminum electrode plates, and an air floatation device 7, an alum reagent adding pipe 8 and an alkali liquor adding pipe 9 are arranged in the electrolytic tank; the area between the other side of the water distribution plate 11 and the water distribution tank 3 is an artificial wetland type biological treatment tank provided with a floating type biological treatment module 2; the water inlet pipe 1 penetrates through the tank body and is directly communicated with the water collecting tank 5; the water outlet 4 is arranged on the side wall of the tank body; a drainage pipe 10 is arranged on the side wall of the electrolytic cell near the partition board 12.

Preferably, the tank body is cylindrical or circular truncated cone-shaped, and the water collecting tank 5 is also cylindrical or circular truncated cone-shaped.

Further, the overflow groove is circular.

Furthermore, the plane view angle of the artificial wetland type biological treatment tank is semicircular.

Furthermore, the plane view angle of the electrolytic cell 6 is 90-degree sector.

A phosphorus removal method for fish culture tail water adopts any one of the phosphorus removal systems for fish culture tail water, and comprises the following steps: the culture tail water enters a water collecting tank 5 from a water inlet pipe 1, passes through an overflow tank along with the increase of the culture tail water, enters an artificial wetland type biological treatment tank containing a biological treatment module 2 from a water distribution tank 3, and flows into an electrolytic tank 6 through a water distribution plate 11 after being treated by hydrophilic plants cultured by a floating plate in the biological treatment module 2; alum is added through a reagent adding pipe 8 while the aluminum electrode is electrolyzed, an air floatation device 7 is started to generate flocculated substances, the flocculated substances are gradually accumulated on the partition board 12 at the rear side of the electrolytic cell 6 and are discharged and collected through a discharge pipe 10; and sodium bicarbonate aqueous solution is added to the rear side of the electrolytic cell 6 through an alkali liquor adding pipe 9, redundant metal ions are removed, the reaction speed is accelerated, and finally treated water is discharged through a water outlet 4.

The invention has the beneficial effects that:

1) the device can run in a time-sharing and sectional manner, and has stable running and low energy consumption.

2) Simple installation and stable treatment effect.

3) The integration level is high, and occupation space is few, and it is simple to maintain.

4) Is suitable for the treatment of tail water of all fish culture systems, and has strong practicability.

5) Can simultaneously use biological, physical and chemical methods to remove phosphorus, and can not secondarily pollute the water body.

Drawings

FIG. 1 is a perspective view of the fish culture tail water dephosphorization system.

Fig. 2 is a top view of fig. 1.

In the figure, 1, a water inlet pipe, 2, a biological treatment module, 3, a water distribution tank, 4, a water outlet, 5, a water accumulation tank, 6, an electrolytic cell, 7, an air flotation device, 8, a reagent adding pipe, 9, an alkali liquor adding pipe and 10, a sewage discharging pipe.

Detailed Description

The invention is further described with reference to the following figures and specific examples.

Referring to fig. 1-2, a fish culture tail water dephosphorization system comprises a tank body; the central part of the pool body is provided with a water collecting pool 5, the periphery of the upper edge of the water collecting pool 5 is provided with an annular overflow trough with the upper edge higher than the water collecting pool 5, the side surface of the overflow trough is provided with a gap, the gap is connected with one end of a water distribution trough 3, and the other end of the water distribution trough 3 extends to the side wall of the pool body; two sides of the water distribution tank 3 are provided with saw-toothed guide plates 301; a serrated water distribution plate 11 extends from one side of the overflow tank opposite to the gap to the edge of the tank body; the water collecting tank 5 extends a clapboard 12 which separates the water in the tank completely towards the inner wall of the tank body; an electrolytic tank 6 is arranged in the area between one side of the water distribution plate 11 and the partition plate 12, the electrolytic tank adopts a pair of aluminum electrode plates, and an air floatation device 7, an alum reagent adding pipe 8 and an alkali liquor adding pipe 9 are arranged in the electrolytic tank; the area between the other side of the water distribution plate 11 and the water distribution tank 3 is an artificial wetland type biological treatment tank provided with a floating type biological treatment module 2; the water inlet pipe 1 penetrates through the tank body and is directly communicated with the water collecting tank 5; the water outlet 4 is arranged on the side wall of the tank body; a drainage pipe 10 is arranged on the side wall of the electrolytic cell near the partition board 12.

In this embodiment, referring to fig. 1-2, the tank body is cylindrical or circular truncated cone-shaped, and the collecting tank 5 is also cylindrical or circular truncated cone-shaped.

In this embodiment, referring to fig. 1-2, the overflow trough is circular.

In this embodiment, referring to fig. 1-2, the constructed wetland type biological treatment tank has a semicircular planar view.

In this example, the cell 6 is shown in a 90 sector in plan view, see figures 1-2.

The fish culture tail water dephosphorization system comprises the following steps: the culture tail water enters a water collecting tank 5 from a water inlet pipe 1, passes through an overflow tank along with the increase of the culture tail water, enters an artificial wetland type biological treatment tank containing a biological treatment module 2 from a water distribution tank 3, and flows into an electrolytic tank 6 through a water distribution plate 11 after being treated by hydrophilic plants cultured by a floating plate in the biological treatment module 2; alum is added through a reagent adding pipe 8 while the aluminum electrode is electrolyzed, an air floatation device 7 is started to generate flocculated substances, the flocculated substances are gradually accumulated on the partition board 12 at the rear side of the electrolytic cell 6 and are discharged and collected through a discharge pipe 10; and sodium bicarbonate aqueous solution is added to the rear side of the electrolytic cell 6 through an alkali liquor adding pipe 9, redundant metal ions are removed, the reaction speed is accelerated, and finally treated water is discharged through a water outlet 4.

According to the invention, after the tail water is collected in the sewage collecting tank, the tail water can be treated by using the biological treatment module, and by utilizing the principle of the artificial wetland, the phosphorus in the water body is absorbed by the root system of the hydrophilic plant, and the artificial light source is arranged. Because the discharge time of tail water is unstable, the tail water can enter the electrolytic cell along with the increase of the water volume of the tail water, an aluminum plate is selected as the anode of the electrolytic cell, the electrolysis principle is utilized to treat when the accumulation of the phosphorus concentration is not high, and meanwhile, the air flotation device is equipped to intensively collect and treat the phosphate generated by electrolysis through bubbles. As the concentration of the phosphorus is increased, alum is added into the electrolytic cell to increase the treatment capacity of the phosphorus, and finally, sodium bicarbonate can be added to treat the residual aluminum ions.

The invention adopts biological and chemical treatment to remove phosphorus, uses the root system of plants to absorb phosphorus under the conventional condition, and utilizes the characteristics of metal cations to generate phosphate and flocculating substances through an electrolysis mode after the concentration is increased, thereby finally achieving the aim of purifying water.

While the preferred embodiments of the present invention have been described, those skilled in the art will appreciate that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined by the appended claims.