CN103503815B - Circuit-type fishpond breeding system integrating circulating water treatment process - Google Patents

Abstract

The invention relates to a ring-type fish pond culture system integrating circulating water treatment process, which includes a ring-shaped fish pond and a sewage treatment system arranged in its inner ring; the sewage treatment system includes a vertical flow solid-liquid separator ( 1), the bottom of the fish pond is provided with a sewage tank (5) perpendicular to the direction of water flow, and communicated with the inlet of the vertical flow solid-liquid separator (1); the outlet of the vertical flow solid-liquid separator (1) is connected to the microfiltration The outlet water of the microfilter (2) is lifted by the water pump (3) and the water pipe (4), and injected into the biofilter (6), the biofilter (6) and the aeration tank ( 7) Separated by a partition and communicated through the through hole in the lower part of the partition, a downpipe (7) is set on the side wall of the aeration and oxygenation tank (8), the downpipe (7) is connected to the fish pond, and the bottom of the downpipe (7) The water outlet direction is the same as the water flow direction of the fish pond; there are two sets of sewage treatment systems, which are centrally symmetrical and evenly arranged in the inner ring of the annular fish pond.

Description

A ring-type fish pond culture system with integrated circulating water treatment process

technical field

The invention relates to a loop-type fish pond culture system, in particular to a loop-type fish pond culture system integrated with a circulating water treatment process.

Background technique

As a habitat for fish farming, fish ponds have more functions than this in industrialized closed circulation aquaculture. They also have the functions of collecting sewage and discharging organic matter such as residual bait and feces in time; timely discharging water bodies with low dissolved oxygen content or Increase oxygen in time; discharge water with high carbon dioxide and high ammonia nitrogen content to relevant water treatment equipment or remove it in time; facilitate grading, fishing, feeding and other operations.

Runway fishponds are divided into straight and circular fishponds, which are often used for salmon and trout farming. Compared with round ponds, track-type fish ponds have the advantages of high water surface utilization rate and convenient operation such as catching and dividing fish; their main disadvantages are poor self-cleaning and sewage discharge capabilities and uneven water quality (DO, ammonia nitrogen, etc.), requiring a large amount of water to Maintain water quality. Specifically, the water quality at the inlet end is the best, while the water quality at the outlet end is the worst; the self-drainage performance is poor, and frequent cleaning and daily maintenance are required. This is because the hydraulic flow rate design is based on dissolved oxygen demand (2-4cm/s) rather than self-drainage demand (15-30cm/s), resulting in a very low actual operating flow rate. Due to the huge gap between the two, the design is usually based on minimizing the intersection area to increase the maximum flow rate. Therefore, many track-type fish ponds are operated in series, and the effluent of the upstream track pool is used as the inflow of the downstream runway pool. At the same time, facilities such as oxygen enhancement and carbon dioxide removal are built between the upstream and downstream fish ponds. At the same time, a still water area (separated from the breeding area by a grille) is set at the end of the runway fish pond to remove sedimentary organic matter, and the sewage is discharged through a vacuum pump. This is the main way to remove organic matter in existing runway fishponds to meet discharge standards, and it takes a lot of labor. In production practice, the water flow rate of raceway fish ponds is far lower than the physiological and ecological needs of fish health, muscle and breathing. Even with lower water flow velocity and water exchange rate, the application of raceway fishpond farming is limited, because it consumes a lot of water with good water quality and produces a lot of aquaculture sewage, which will bring serious environmental impact.

Contents of the invention

The technical problems to be solved by the present invention are: the existing ring-type fish ponds have low self-purification ability; the purification process needs to consume a large amount of labor; the water body environment is far below the physiological and ecological needs of fish health, muscle and breathing; water body exchange The rate is high, and a large amount of aquaculture sewage is produced by consuming a large amount of water with good water quality, which has brought serious environmental impact.

The present invention takes the following technical solutions:

A ring-type fish pond culture system integrating circulating water treatment technology, characterized in that: it includes a fish pond in the shape of a circular runway, and a sewage treatment system arranged in its inner ring; the sewage treatment system includes a vertical flow solid-liquid Separator 1, the bottom of the fish pond is provided with a sewage tank 5 perpendicular to the water flow direction, and is communicated with the inlet of the vertical flow solid-liquid separator 1; the outlet of the vertical flow solid-liquid separator 1 is communicated with the microfilter 2 , the outlet water of the microfilter 2 adopts the water pump 3 and the water pipe 4 to lift water, and injects into the biofilter 6, the biofilter 6 is separated from the aeration and oxygenation tank 8 by a partition, and passes through the bottom of the partition The through hole of the aeration and oxygenation pool 8 sidewalls is provided with a downpipe 7, the downpipe 7 is connected with the fish pond, and the water outlet direction at the bottom of the downpipe 7 is in the same direction as the water flow direction of the fish pond; the sewage treatment system is provided with two sets. The inner ring of the annular fish pond is arranged symmetrically and uniformly in the center.

The feature of this technical solution is that a sewage discharge tank is set at the bottom of the fish pond, so that fixed debris such as fish feces flow into the vertical flow solid-liquid separator along a certain water flow, and the vertical flow solid-liquid separator removes larger particles of solid impurities , the first step of purification is performed on the water flow, and then the second step of purification is carried out on the water flow through the microfiltration machine. At this time, the water pump and the water lifting pipe are used to lift the water from the low place to the high biofilter for the third step of purification , it flows into the aeration and oxygenation tank through the through hole in the lower part of the partition, the aeration and oxygenation tank aerates the water body, and finally the water in the aeration and oxygenation tank falls into the fish pond through the downpipe, and the water flow falls from the height , has a certain kinetic energy, the bottom of the downpipe is designed as an elbow, and the direction of the elbow is the flow of water in the fish pond. In this way, the kinetic energy of the water flow from top to bottom is converted into kinetic energy of lateral flow, and the downpipe provides power for the water circulation of the fish pond. The sewage treatment system is centrally symmetrically arranged in the inner ring of the ring road, which further optimizes the structure of the fish pond culture system of the present invention, and enhances the water flow power and purification effect.

Further, the circuit includes a pair of parallel straights and a pair of symmetrical semicircular bends.

Further, the sewage discharge tank 5 is arranged at the turning places at both ends of the fish pond.

Further, the bottom of the vertical flow solid-liquid separator 1 is provided with a funnel-shaped sewage outlet, and the opening or closing of the sewage outlet is controlled by a valve.

Further, the height of the water lifting pipe 4 is about 200-500 mm higher than that of the downspout 7 .

The beneficial effects of the present invention are:

1) It integrates push flow, physical filtration, oxygenation, carbon dioxide removal, biological filtration and loop fish pond design to form a small circulating aquaculture system with comprehensive functions and ingenious design;

2) Promote the uniform distribution of dissolved oxygen, ammonia nitrogen, carbon dioxide, etc. in the water body, and improve the water homogeneity of the ring-type fish pond;

3) Compared with the conventional ring-type fish pond, the present invention forms a push-flow effect through water circulation, and the water flow rate becomes adjustable within a certain range, which improves the hydraulic condition and water flow state of the ring-type fish pond, and promptly and quickly discharges residual bait Feces; reducing water consumption by improving water quality, while maintaining a certain water flow rate can promote fish bone development and healthy growth;

4) Construct a set of process flow for collecting and separating organic matter such as residual bait and feces by means of sewage tank, vertical flow solid-liquid separation device, microfiltration machine, etc., which is simple and efficient to collect and discharge organic matter, and is convenient and simple to maintain;

5) Improve the water quality of the water body through oxygenation, logistics filtration, biological filtration and degassing of the circulating aquaculture system, thereby reducing water consumption and saving 90% of water;

6) Make full use of the vacant area in the pool as the water treatment area, rationally configure the vertical flow solid-liquid separator, microfilter, biological filter, aeration and oxygenation pool, etc., improve and strengthen the water treatment function of the fish pond, based on the ring road fish pond A simple recirculating aquaculture system is constructed to improve land utilization.

7) Integrate the advantages of the ring-type fish pond and the circulating water treatment process to form a fish pond culture system with a certain internal circulating water treatment capacity, and each fish pond has a certain degree of independence and flexibility.

8) The fish pond has the functions of oxygenation, degassing, physical filtration and biological filtration. By quickly and timely removing residual bait and feces and other organic matter, the water quality can be improved to reduce water consumption, and at the same time improve the water flow state and promote the healthy growth of fish.

9) It has good adaptability to complex operating conditions such as fishing, fish grading, baiting, broodstock induction and so on.

10) It is suitable for adult fish or broodstock farming of most fish, especially for high-density intensive farming of swimming fish such as salmon and trout, and can also be used in other related farming fields.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of a loop-type fish pond culture system integrated with a circulating water treatment process of the present invention.

Fig. 2 is a top view of the ring-type fish pond culture system integrated with the circulating water treatment process of the present invention.

Fig. 3 is a sectional view along A-A in Fig. 2 .

Fig. 4 is a front view of the ring-type fish pond culture system integrated with the circulating water treatment process of the present invention.

Fig. 5 is a cross-sectional view along B-B in Fig. 2 .

In the figure, 1. Vertical flow solid-liquid separator, 2. Microfilter, 3. Water pump, 4. Water pipe, 5. Sewage tank, 6. Biological filter, 7. Downpipe, 8. Aeration and oxygenation tank .

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Referring to Fig. 1-5 together, a ring-type fishpond culture system with integrated circulating water treatment process is characterized in that: it includes a fishpond in the shape of a circular runway, and a sewage treatment system located in its inner ring; the sewage treatment The system includes a vertical flow solid-liquid separator 1, and the bottom of the fish pond is provided with a sewage discharge tank 5 perpendicular to the water flow direction, and communicated with the inlet of the vertical flow solid-liquid separator 1; the vertical flow solid-liquid separator 1 The outlet is communicated with the microfilter 2, and the outlet water of the microfilter 2 is lifted by the water pump 3 and the water pipe 4, and injected into the biofilter 6, and the biofilter 6 and the aeration and oxygenation pool 8 are separated by a clapboard. open, and communicated through the through hole at the bottom of the clapboard, a downpipe 7 is set on the side wall of the aeration and oxygenation tank 8, the downpipe 7 communicates with the fish pond, and the water outlet direction at the bottom of the downpipe 7 is in the same direction as the water flow direction of the fish pond; the sewage treatment There are two sets of systems, which are centrally symmetrical and evenly arranged in the inner ring of the annular fish pond.

Set up a sewage tank at the bottom of the fish pond, so that fixed debris such as fish feces flow into the vertical flow solid-liquid separator along a certain water flow, and the vertical flow solid-liquid separator removes larger particles of solid impurities and performs the first step on the water flow Purification, and then carry out the second step of purification on the water flow through the microfiltration machine. At this time, the water pump and the water lifting pipe are used to lift the water from the lower part to the higher biological filter tank, and the third step of purification is carried out, and the aeration and oxygenation tank is realized. In order to aerate and increase oxygen, the water in the aeration and oxygenation tank is finally dropped into the fish pond through the downpipe. The water flow falls from the height and has a certain kinetic energy. The bottom of the downpipe is designed as an elbow, and the direction of the elbow is the flow direction of the water in the fish pond. In this way, the kinetic energy of the water flow from top to bottom is converted into the kinetic energy of the lateral flow, and the downpipe provides power for the water circulation of the fish pond. The sewage treatment system is arranged symmetrically in the inner ring of the ring road, which further optimizes the structure of the fish pond culture system of the present invention, and enhances the water flow power and purification effect.

The bottom of the vertical flow solid-liquid separator 1 is provided with a funnel-shaped sewage outlet, and the opening or closing of the sewage outlet is controlled by a valve, and solid waste such as sewage and feces can be regularly removed through the sewage outlet. Fill the pond with clean water.

The height of the water-lifting pipe 4 is slightly higher than the height of the downpipe 7, and the water-lifting pipe injects water into the biofilter 6 from top to bottom. 7 falls and pours into the fish pond.

In this embodiment, diversion grooves will be set at the corners at both ends of the fish pond to divert the dirt to the vertical flow solid-liquid separation device and remove it in time; the water will be sucked from the microfilter pool to the high-level biological filter tank through the water pump, and then enter the exposure tank. Air oxygenation pool, so as to enter water from the ring fish pond along the water inlet pipes on both sides to form a fish pond circulating aquaculture system; at the same time, it forms a push flow force that is consistent with the water flow direction of the ring fish pond, so that the shape of the feces is destroyed and the water body flow The force of the state is transformed into the push flow force of the improved flow state, and the self-drainage and self-circulation of the loop pool are realized from the two aspects of sewage removal and water flow state, which fundamentally solves the self-drainage ability of the fish pond.

Adjusting the control valve of the water pump can regulate the circulation volume of the loop fish pond circulation system, and can generate different water flow driving forces (hydraulic momentum) within a certain range to form a water flow rate that meets the growth and development of fish; It can meet the water flow rate required for self-drainage; it fundamentally solves the technical problems of small flow rate required for fish growth and high flow rate required for self-drainage.

Conventional ring-type fish ponds bring sufficient oxygen through continuous consumption of a large amount of clear water, and remove residual bait feces through push flow, which requires a high water body exchange rate; the present invention has the ability to remove residual bait feces and ammonia nitrogen through water circulation. , The role of aeration and oxygenation, thereby greatly reducing the water exchange rate. Due to the improvement of water quality conditions such as organic matter, ammonia nitrogen, and dissolved oxygen, the fish pond system of the present invention only needs to add a very small amount of clean water to maintain the normal operation of the system.

The invention has the advantages of simple manufacture, convenient sewage discharge, low investment, easy maintenance, high ammonia nitrogen treatment capacity and the like. It can form an independent circulating water system in a ring-type fish pond to achieve the effects of increasing oxygen, removing organic matter such as residual bait and feces, removing carbon dioxide, and removing ammonia nitrogen. It can solve the problems of difficult sewage discharge, large sewage discharge volume and unreasonable water flow rate in runway fish ponds.

Claims (5)

1. a loop-type fishpond cultivating system for integrated circulating water treatment process, is characterized in that:

Comprise the fishpond of runway shape ringwise, and be located at the sewage disposal system in its inner ring;

Described sewage disposal system comprises vertical-flow solid-liquid separator (1), is provided with the dirt discharge groove (5) vertical with water (flow) direction bottom fishpond, and with the inlet communication of described vertical-flow solid-liquid separator (1); Described vertical-flow solid-liquid separator (1) outlet is communicated with Microfilter (2), the water outlet of described Microfilter (2) adopts water pump (3) and water lift pipe (4) water lift, and inject biofilter (6), described biofilter (6) and aeration oxygen replenishing pond (8) are separated by dividing plate, and be communicated with by the through hole of the lower partition, aeration oxygen replenishing pond (8) sidewall is arranged downpipe (7), described downpipe (7) is communicated with fishpond, and the water (flow) direction in downpipe (7) water outlet direction, bottom and fishpond in the same way;

Described sewage disposal system is provided with two covers, and being centrosymmetric in the inner ring in annular fishpond is evenly arranged.

2. loop-type fishpond as claimed in claim 1 cultivating system, is characterized in that: described circuit comprises pair of parallel straight way, and the semicircle bend of a pair symmetry.

3. loop-type fishpond as claimed in claim 2 cultivating system, is characterized in that: described dirt discharge groove (5) is arranged at the turning at two ends, fishpond.

4. loop-type fishpond as claimed in claim 1 cultivating system, is characterized in that: described vertical-flow solid-liquid separator (1) bottom is provided with funnelform sewage draining exit, and passes through unlatching or the closedown of Valve controlling sewage draining exit.

5. loop-type fishpond as claimed in claim 1 cultivating system, is characterized in that: the height of described water lift pipe (4) is higher than the height 200-500mm of downpipe (7).