CN217351116U

CN217351116U - Industrial fish culture water treatment system

Info

Publication number: CN217351116U
Application number: CN202221387507.3U
Authority: CN
Inventors: 吴健; 王朝申; 董国防
Original assignee: Zhengzhou University
Current assignee: Zhengzhou University
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2022-09-02
Anticipated expiration: 2032-06-01

Abstract

The utility model belongs to the technical field of breed waste water treatment, a batch production water treatment system of breeding fish is disclosed. The device comprises a flocculation filter tank, a sedimentation tank, a sand filter tank and a algae and bacteria water treatment tank, and is characterized in that an outlet at the upper part of the flocculation filter tank is connected with a first sedimentation tank through a pipeline, a water outlet at the bottom of the flocculation filter tank is connected with a primary algae and bacteria water treatment tank through a pipeline, and the primary algae and bacteria water treatment tank is sequentially connected with the sand filter tank, a terminal algae and bacteria water treatment tank and a fish pond through pipelines; the bottom of the sand filter is connected with a back-flushing device through a pipeline, the back-flushing device is connected with a back-flushing algae-bacteria water treatment tank through a pipeline, the back-flushing algae-bacteria water treatment tank is connected with a second sedimentation tank through a pipeline, and the second sedimentation tank is communicated with a sand bed. The system has low energy consumption, can well reduce the levels of ammonia nitrogen, nitrite nitrogen, COD and phosphate, improves dissolved oxygen and ensures the health of the fish body.

Description

Industrial fish culture water treatment system

Technical Field

The utility model belongs to the technical field of breed waste water treatment, a batch production water treatment system of breeding fish is related to.

Background

The industrial fish culture is a high-density culture process, and low dissolved oxygen, high COD, high ammonia nitrogen and high nitrite are caused by accumulation of residual bait and fish feces and mass propagation of bacteria, so that the water quality is deteriorated, and the fish culture is very unfavorable for the growth of the fish. In order to avoid such problems, two methods are generally adopted, one is to adopt running water culture and continuously replace fresh water; another approach is to reuse the culture water. Obviously, the purification and reuse of the aquaculture water are a sustainable development idea and are relatively economical. However, the purification of the culture water to reduce the COD, ammonia nitrogen and nitrite nitrogen levels is currently limited by technical and economic limitations, such as the common biological methods including rotating biological disk, trickling filter, ecological wetland, nitrification tank, etc., and the physical and chemical methods including ozone purification, ion exchange and membrane filtration, etc., or their combination. These methods also have some disadvantages in use, such as too high equipment cost or too high running cost, and not ideal certain index of water quality purification. Therefore, research and development of practical industrial fish culture water treatment systems are urgently needed to meet market demands.

Disclosure of Invention

To the existing problem, the utility model provides an economical and feasible industrial fish culture water treatment system solves the problem that current treatment fish culture waste water faces.

The technical solution of the utility model is as follows:

the industrial fish culture water treatment system comprises a flocculation filter tank, a sedimentation tank, an algae bacteria water treatment tank and a backwashing device, and is characterized in that a water outlet at the upper part of the flocculation filter tank is connected with a first sedimentation tank through a pipeline, a water outlet at the bottom of the flocculation filter tank is connected with a primary algae bacteria water treatment tank through a pipeline, and the primary algae bacteria water treatment tank is sequentially connected with a sand filter tank, a terminal algae bacteria water treatment tank and a fish pond through pipelines; the bottom of the sand filter is connected with a back-flushing device through a pipeline, the back-flushing device is connected with a back-flushing algae-bacteria water treatment tank through a pipeline, the back-flushing algae-bacteria water treatment tank is connected with a second sedimentation tank through a pipeline, and the second sedimentation tank is communicated with a sand bed.

The water outlet of the first sedimentation tank is connected into the flocculation filter tank through a pipeline with a pump; the water outlet of the sand filter is connected with a backwashing algae and bacteria water treatment tank through a pipeline; the bottom of the terminal algae bacterium water treatment tank is connected with a second sedimentation tank through a pipeline; the bottom of the primary algae bacterium water treatment tank is connected with a second sedimentation tank through a pipeline.

The upper part of the flocculation filter tank consists of algae bacterium flocculating constituents, the lower part of the flocculation filter tank consists of a sand filtration structure, and the fine powder washed out by back flushing enters a first sedimentation tank for sedimentation.

The upper parts of the primary and terminal algae bacterium water treatment tanks and the back flush algae bacterium water treatment tank are filamentous green algae layers, the lower part of the box is lined with a supporting and filtering cotton layer, the bottom of the box is paved with sand and a blow-off pipe, and precipitates are discharged to a second sedimentation tank through the blow-off pipe.

The backwashing equipment influences the strength of backwashing air and backwashing water by controlling the aeration rate and the water flow rate. The back washing direction of the sand filter is from bottom to top.

The filamentous green algae in the algae bacteria water treatment box has better pollution resistance, is preferably rhizoctonia (Rhizoctonium), and particularly refers to a fresh water domesticated rhizoctonia variety. A large number of experiments verify and analyze that the root-branch algae can be well symbiotic with bacteria, and is more beneficial to purifying wastewater.

The filter cotton has a huge specific area through bending, and can provide a large amount of attachment space for bacteria. The bacteria are long-term domesticated and cultured aerobic flora capable of symbiotic with rhizoctonia, and comprise autotrophic nitrifying bacteria capable of converting ammonia nitrogen into nitrate nitrogen.

LED illumination systems are arranged on the upper portions of the flocculation sedimentation tank containing the photosynthetic algae and the algae bacterium water treatment tank so as to ensure the night treatment effect.

The utility model discloses the advantage: the industrial fish culture water treated by the system well reduces the levels of ammonia nitrogen, nitrite nitrogen, COD and phosphate, improves dissolved oxygen, purifies the fish culture water body and ensures the health of the fish body. And the water is recycled, the water resource is saved, the environmental water pollution is avoided, the cost is low, and the energy consumption is low. Is favorable for popularization and application in industrial fish culture.

Drawings

Fig. 1 is a schematic structural view of the present invention. Wherein, 1 is a flocculation filter tank, 2 is a first sedimentation tank, 3 is a primary algae bacterium water treatment tank, 4 is a sand filter tank, 5 is a terminal algae bacterium water treatment tank, 6 is a fishpond, 7 is a back washing device, 8 is a back washing algae bacterium water treatment tank, 9 is a second sedimentation tank, and 10 is a sand bed.

FIG. 2 is a schematic structural diagram of a primary and terminal phycomycete water treatment tank. Wherein, the upper part is a filiform green algae layer A, the lower part is lined with a supporting and filtering cotton layer B, and the bottom is paved with sandstone C and a blow-off pipe D.

Detailed Description

To better illustrate the present invention, the following examples are given:

example 1

The industrial fish culture water treatment system comprises a flocculation filter tank, a sedimentation tank, an algae bacteria water treatment tank and a backwashing device, and is characterized in that a water outlet at the upper part of the flocculation filter tank 1 is connected with a first sedimentation tank 2 through a pipeline, a water outlet at the bottom of the flocculation filter tank 1 is connected with a primary algae bacteria water treatment tank 3 through a pipeline, and the primary algae bacteria water treatment tank 3 is sequentially connected with a sand filter tank 4, a terminal algae bacteria water treatment tank 5 and a fish pond 6 through pipelines; the bottom of the sand filter 4 is connected with a backwashing device 7 through a pipeline, the bottom of the backwashing device 7 is connected with a backwashing algae bacterium water treatment tank 8 through a pipeline, the backwashing algae bacterium water treatment tank 8 is connected with a second sedimentation tank 9 through a pipeline, and the second sedimentation tank is introduced into a sand bed 10.

The water outlet of the first sedimentation tank 2 is connected into the flocculation filter tank 1 through a pipeline with a pump; the upper back-flushing water outlet of the sand filter 4 is connected with a back-flushing algae bacterium water treatment tank 8 through a pipeline; the bottom of the terminal algae bacterium water treatment tank 5 is connected with a second sedimentation tank 9 through a pipeline; the bottom of the primary algae bacterium water treatment tank 3 is connected with a second sedimentation tank through a pipeline.

The upper part of the flocculation filter tank 1 consists of algae bacteria flocculating constituents, the lower part of the flocculation filter tank consists of a sand filtration structure, and the backflushed fine powder enters the first sedimentation tank for sedimentation 2.

Primary, terminal algae fungus water treatment case and back flush algae fungus water treatment incasement upper portion be filiform green algae layer A, be lined with down and support filter cotton layer B, the bottom has spread gravel and sand C and blow off pipe D, a small amount of filth passes through the blow off pipe and discharges to the second sedimentation tank, sediment is discharged to the sand bed in the sedimentation tank regularly and is retrieved.

The backwashing device 7 influences the strength of the backwashing gas and the backwashing water by controlling the aeration rate and the flow rate. The back washing direction of the sand filter is from bottom to top.

The filamentous green algae of the algae bacteria water treatment tank has better pollution resistance and is beneficial to purifying waste water. The filter cotton has a huge specific area through bending, and can provide a large amount of attachment space for bacteria. The bacteria are long-term domesticated and cultured aerobic flora capable of symbiotic with rhizoctonia, and comprise autotrophic nitrifying bacteria capable of converting ammonia nitrogen into nitrate nitrogen.

The working process and principle are as follows:

(1) the fish culture wastewater is physically and biologically purified by the flocculation filter tank 1 and the first sedimentation tank 2, and large granular substances in the wastewater are intercepted.

(2) And pumping the effluent of the flocculation filter tank 1 to a primary algae bacterium water treatment tank 3, adsorbing and degrading viscous macromolecules, nitrogen, phosphorus and other substances in the wastewater by using the symbiotic action of algae bacteria, and removing a large amount of solid matters. Through the primary purification of the phycomycetes, the color turbidity of the effluent is obviously reduced.

(3) The effluent of the primary algae bacterium water treatment tank 3 flows to the sand filter 4, and river sand filled in the sand filter 4 has smaller particle size, so that smaller particles and suspended matters in the filtered wastewater are facilitated. The particles and suspended matters can be utilized and degraded by microorganisms in the sand filter 4. The microorganisms can also carry out nitrification and denitrification to further degrade ammonia nitrogen, COD and the like in the wastewater.

(4) The outlet water of the sand filter 4 enters a terminal algae bacterium water treatment tank 5, nitrogen and phosphorus are further removed, dissolved oxygen is improved, and the outlet water after final treatment enters a fish pond 6.

(5) The backwashing equipment 7 at the bottom of the sand filter tank periodically performs backwashing on the sand filter tank, backwashing water flows into the backwashing algae bacteria water treatment tank 8 for treatment, and suspended matters in water are removed through flocculation of algae bacteria. The clear water in the backwashing algae bacterium water treatment tank 8 is used for periodically backwashing the sand filter through the backwashing equipment 7.

(6) And (3) periodically discharging sludge at the bottoms of the phycomycete

water treatment tanks

3, 5 and 8 to a second sedimentation tank 9, collecting sediments, and discharging the sediments to a sand bed 10 for recovery.

The method can treat the fish-farming wastewater, black and odorous water and polluted river water, and can be used for upgrading the standard-reaching discharge water of a sewage treatment plant.

Aiming at the treatment of certain fish-farming wastewater, the indexes before and after the treatment are compared as follows:

Claims

1. an industrial fish culture water treatment system comprises a flocculation filter tank, a sedimentation tank, a phycomycete water treatment tank and a backwashing device, and is characterized in that a water outlet at the upper part of the flocculation filter tank is connected with a first sedimentation tank through a pipeline, a water outlet at the bottom of the flocculation filter tank is connected with a primary phycomycete water treatment tank through a pipeline, and the primary phycomycete water treatment tank is sequentially connected with a sand filter tank, a terminal phycomycete water treatment tank and a fish pond through pipelines; the bottom of the sand filter is connected with a backwashing device through a pipeline, the backwashing device is connected with a backwashing algae bacterium water treatment tank through a pipeline, the backwashing algae bacterium water treatment tank is connected with a second sedimentation tank through a pipeline, and the second sedimentation tank is introduced into the sand bed;

the water outlet of the first sedimentation tank is connected into a flocculation filter tank through a pipeline with a pump; a water outlet at the upper part of the sand filter is connected with a backwashing algae and bacteria water treatment tank through a pipeline; the bottom of the terminal algae bacterium water treatment tank is connected with a second sedimentation tank through a pipeline; the bottom of the primary algae bacterium water treatment tank is connected with a second sedimentation tank through a pipeline.

2. The industrial fish-farming water treatment system of claim 1, wherein the flocculation filter tank is composed of an upper part of a flocculation body of algal bacteria and a lower part of a sand filtration structure.

3. The industrial fish culture water treatment system of claim 1 or 2, wherein the upper parts of the primary and terminal algae bacteria water treatment tanks and the back washing algae bacteria water treatment tank are provided with filamentous green algae layers, the lower parts of the primary and terminal algae bacteria water treatment tanks are provided with supporting filter cotton layers, and the bottoms of the primary and terminal algae bacteria water treatment tanks are paved with sand stones and sewage pipes.