CN110240362A - An efficient method for the treatment of aquaculture tail water - Google Patents

Abstract

The invention discloses an efficient aquaculture tail water treatment method, comprising a physical treatment part and a biological treatment part, wherein the physical treatment part adopts an ultrafiltration module wound and woven with hollow fibers, and the biological treatment part includes a plant purification module, a microorganism purification module, an aquatic Animal purification module, biological treatment part includes plant purification module, microbial purification module and aquatic animal purification module. The microbial purification module uses microbial preparations to purify aquaculture tail water. Ammonizing bacteria, sulfur bacteria, etc., aquatic animal purification module, including filter-feeding fish and shellfish, specifically refers to the species of shellfish such as silver carp and bighead carp, river mussels and scallops, constricted clams, oysters, etc. The method combines physical and biological treatment to effectively construct a virtuous cycle of aquaculture ecology. The physical part has the advantages of high sterilization efficiency, broad spectrum, no secondary pollution, no noise, less land occupation and continuous large-scale water disinfection.

Description

An efficient method for the treatment of aquaculture tail water

technical field

The invention relates to the technical field of water treatment for pond culture, in particular to an efficient method for treating tail water of aquaculture.

Background technique

Freshwater aquaculture in my country generally adopts a high-density intensive aquaculture model, and there are prominent problems such as excessive stocking and excess bait, which lead to serious eutrophication of water in aquaculture ponds and frequent aquaculture diseases. The problem of water environment pollution in pond aquaculture has become the main restricting factor for the development of freshwater aquaculture, and most of the current methods of treating aquaculture tail water are mainly chemical methods, which have a quicker effect in regulating water quality, but have caused great harm to the human body. It often greatly increases the cost of aquaculture and is accompanied by certain side effects, and cannot reduce the nitrogen and phosphorus content of pond nutrients.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide an efficient method for treating aquaculture tail water in view of the above problems.

In order to solve the above-mentioned technical problems, the technical scheme provided by the present invention is as follows: an efficient method for treating aquaculture tail water, comprising a physical treatment part and a biological treatment part, and includes the following steps:

(1) Due to gravity, the aquaculture tail water flows into the filter collection tank, and undergoes a physical filtration through the ultrafiltration module of the physical treatment part.

(2) The aquaculture tail water enters the reservoir, and the reservoir is provided with a biological treatment part, including a plant purification module, a microbial purification module, and an aquatic animal purification module. The plant purification module includes higher plants and algae purification. The microbial purification module described above uses microbial preparations to purify aquaculture tail water.

(3) After the tail water treatment is completed, it enters the return pond through the reverse osmosis device and waits to be injected into the breeding pond. The breeding pond is equipped with an aquatic animal purification module. In addition to the target species for breeding, the breeding pond also has an aquatic animal purification module, including Filter-feeding fish and shellfish.

Compared with the prior art, the present invention has the advantages that: the method combines physical and biological treatment, effectively constructing a virtuous cycle of aquaculture ecology, and is less penetrating than its ultraviolet rays in water, and is greatly affected by water color and transparency, And the equipment is expensive and easy to break. The physical part has the advantages of high sterilization efficiency, broad spectrum, no secondary pollution, no noise, small footprint and continuous large-scale water disinfection. The biological method is environmentally friendly and low in cost. It is suitable for various Environmental conditions of waters, is a promising green aquaculture pollution control technology. Its biggest advantage is that it uses less non-renewable materials and energy, and does not cause secondary pollution to the environment.

As an improvement, the ultrafiltration module of the physical treatment part adopts hollow fiber winding and weaving as a physical barrier between the waste water flow and the purified water flow.

As an improvement, the plant purification module includes purification of higher plants and algae, specifically water celery, water spinach, water lily, water hyacinth, elegans and the like.

As an improvement, the microbial preparation contains photosynthetic bacteria, actinomycetes, bacillus, nitrifying bacteria, ammoniated bacteria, sulfur bacteria and the like.

As an improvement, the aquatic animal purification module includes filter-feeding fish and shellfish, specifically silver carp and bighead carp, river mussels and scallops, clams, oysters and other shellfish species.

As an improvement, the reverse osmosis device adopts a thin film spiral wound element, which can remove the dissolved salts in the wastewater.

As an improvement, the microbial preparation improves water quality and inhibits the beneficial microorganisms of aquatic diseases, the removal rate of BOD is 83.1%-86.6%, the removal rate of nitrogen is 53%-68.2%, and the removal rate of phosphorus is 74.3% %-80.9%, the purification effect is more obvious.

As an improvement, the algae Elodea in the plant purification module can release a large amount of oxygen in the process of photosynthesis, and can also absorb a large amount of harmful ammonia nitrogen, carbon dioxide and remaining bait dissolved substances and some organic substances continuously produced in the water. decomposition products.

As an improvement, the water lotus and water hyacinth of the plant purification module can quickly absorb the nutrient salts in the water body and the bottom mud, and can effectively reduce the nitrogen and phosphorus content in the water body and the bottom mud.

As an improvement, the suspended solids content of the aquaculture tail water before the physical treatment part is 70mg/L. After the treatment, the suspended solids content is significantly reduced, the content range is 40mg/L, and the energy efficiency of the reduction is 41.7%.

As an improvement, the plant purification module, microbial purification module and aquatic animal purification module of the biological treatment part of the aquaculture tail water can effectively remove the nitrogen and phosphorus content in the water body. The energy efficiency is 19.6%, and after treatment, the BOD in the water body reaches the surface water class V standard and can be directly used or discharged.

Description of drawings

Figure 1 is a schematic diagram of the workflow of an efficient aquaculture tail water treatment method.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings.

When the present invention is specifically implemented, an efficient method for treating tail water of aquaculture includes a physical treatment part and a biological treatment part, and includes the following steps:

(1) Due to gravity, the aquaculture tail water flows into the filter collection tank, and undergoes a physical filtration through the ultrafiltration module of the physical treatment part.

(2) The aquaculture tail water enters the reservoir, and the reservoir is provided with a biological treatment part, including a plant purification module, a microbial purification module, and an aquatic animal purification module. The plant purification module includes higher plants and algae purification. The microbial purification module described above uses microbial preparations to purify aquaculture tail water.

(3) After the tail water treatment is completed, it enters the return pond through the reverse osmosis device and waits to be injected into the breeding pond. The breeding pond is equipped with an aquatic animal purification module. In addition to the target species for breeding, the breeding pond also has an aquatic animal purification module, including Filter-feeding fish and shellfish.

The ultrafiltration module of the physical treatment part adopts hollow fiber winding and weaving as a physical barrier between the waste water flow and the purified water flow.

The plant purification module includes purification of higher plants and algae, specifically water celery, water spinach, water lily, water hyacinth, elegans and the like.

The microbial preparation contains photosynthetic bacteria, actinomycetes, bacillus, nitrifying bacteria, ammoniated bacteria, sulfur bacteria and the like.

The aquatic animal purification module includes filter-feeding fish and shellfish, and specifically refers to shellfish species such as silver carp and bighead, river mussels, scallops, constricted clams, and oysters.

The reverse osmosis device adopts a thin film spiral wound element, which can remove the dissolved salts in the wastewater.

The microbial preparation improves water quality and inhibits the beneficial microorganisms of aquatic diseases. The removal rate of BOD is 83.1%-86.6%, the removal rate of nitrogen is 53%-68.2%, and the removal rate of phosphorus is 74.3%-80.9%. The purification effect is more obvious.

The algae Elodea in the plant purification module can release a large amount of oxygen in the process of photosynthesis, and can also absorb a large amount of harmful ammonia nitrogen, carbon dioxide and remaining bait dissolved matter and some organic decomposition products continuously generated in the water.

The water lotus and water hyacinth of the plant purification module can quickly absorb the nutrient salts in the water body and the bottom mud, and can effectively reduce the nitrogen and phosphorus content in the water body and the bottom mud.

The suspended solids content of the aquaculture tail water before the physical treatment part is 70mg/L. After the treatment, the suspended solids content is obviously reduced, the content range is 40mg/L, and the energy efficiency of the reduction is 41.7%.

The plant purification module, microbial purification module and aquatic animal purification module of the biological treatment part of the aquaculture tail water can effectively remove the nitrogen and phosphorus content in the water body. After treatment, the nitrogen content in the water body is reduced by 0.84mg/L, and the energy efficiency of the reduction is 19.6 %, and after treatment, the BOD in the water body reaches the surface water class V standard and can be directly used or discharged.

The working principle of the present invention: this method organically combines physical and biological treatment technologies, the culture system can maintain a good water quality by replacing about 10% of new water every day, and the aerator can increase the dissolved oxygen in the water body, promote the convection of the pool water, Oxidation, so that toxic gas overflows, the physical treatment part adopts the ultrafiltration module of hollow fiber winding and weaving, and the biological treatment part includes plant purification module, microorganism purification module, aquatic animal purification module, and the biological treatment part includes plant purification module, microorganism Purification module, aquatic animal purification module, the microbial purification module uses microbial preparations to purify the tail water of aquaculture, and the microbial preparations contain photosynthetic bacteria, actinomycetes, bacillus, nitrifying bacteria, ammoniated bacteria, sulfur bacteria, etc. The aquatic animal purification module includes filter-feeding fish and shellfish, and specifically refers to shellfish species such as silver carp and bighead carp, river mussels and scallops, constricted clams, oysters and the like.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, the features defined with "first" and "second" may expressly or implicitly include one or more of the features, and in the description of the present invention, "multiple" means two or two above, unless otherwise expressly defined herein.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level less than the second feature.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those of ordinary skill in the art will not depart from the principles and spirit of the present invention Variations, modifications, substitutions, and alterations to the above-described embodiments are possible within the scope of the present invention without departing from the scope of the present invention.

Claims (6)

1. an efficient aquaculture tail water treatment method, comprising a physical treatment part, a biological treatment part, comprising the steps: (1) Due to gravity, the aquaculture tail water flows into the filter collection tank, and undergoes a physical filtration through the ultrafiltration module of the physical treatment part. (2) The aquaculture tail water enters the reservoir, and the reservoir is provided with a biological treatment part, including a plant purification module, a microbial purification module, and an aquatic animal purification module. The plant purification module includes higher plants and algae purification. The microbial purification module described above uses microbial preparations to purify aquaculture tail water. (3) After the tail water treatment is completed, it enters the return pond through the reverse osmosis device and waits to be injected into the breeding pond. The breeding pond is equipped with an aquatic animal purification module. In addition to the target species for breeding, the breeding pond also has an aquatic animal purification module, including Filter-feeding fish and shellfish. 2. a kind of efficient aquaculture tail water treatment method according to claim 1, is characterized in that: the ultrafiltration module of described physical treatment part adopts hollow fiber winding weaving, as the physics between waste water flow and clean water flow. barrier layer. 3. a kind of efficient cultivation tail water treatment method according to claim 1, is characterized in that: described plant purification module comprises higher plants and algae purification, specifically has water celery, water spinach, water lily, water Gourd, Elodea, etc. 4. a kind of efficient aquaculture tail water treatment method according to claim 1 is characterized in that: described microbial preparation contains photosynthetic bacteria, actinomycetes, bacillus, nitrifying bacteria, ammoniated bacteria, sulfur bacteria etc. . 5. a kind of efficient aquaculture tail water treatment method according to claim 1 is characterized in that: described aquatic animal purification module, comprises filter-feeding fish and shellfish, specifically refers to silver carp and bighead carp, river mussels and scallops , clams, oysters and other shellfish species. 6 . An efficient aquaculture tail water treatment method according to claim 1 , wherein the reverse osmosis device adopts a thin-film spiral wound element, which can remove dissolved salts in the wastewater. 7 .