CN212894111U

CN212894111U - Nitrate nitrogen purification system in surface water body

Info

Publication number: CN212894111U
Application number: CN202020708796.7U
Authority: CN
Inventors: 曹文平; 江成; 李泽兵; 彭惠靖; 曾青青
Original assignee: Jiangsu Lianyanggang Environmental Protection Technology Co ltd
Current assignee: Jiangsu Lianyanggang Environmental Protection Technology Co ltd
Priority date: 2020-05-01
Filing date: 2020-05-01
Publication date: 2021-04-06
Anticipated expiration: 2030-05-01

Abstract

The utility model discloses a nitrate nitrogen clean system in surface water body relates to surface water body ecological remediation technical field. A nitrate nitrogen purification system in surface water comprises a purification and water storage area, a combined type ecological floating bed area floating on the top of the water storage area, a submersible pump and a filter feeding animal area which are respectively arranged in the purification and water storage area, wherein a bamboo substrate is filled in the combined type ecological floating bed area, aquatic plants are planted in the bamboo substrate, and fishes are cultured in the purification and water storage area. The utility model realizes the phagocytosis of falling biomembranes and plankton in the floating bed system, and improves the renewal of biomembranes and the activity of plankton; the water body exchange driving unit strengthens the flow of the water body, reduces dead zones in the ecological purification system, and obtains better purification under the synergistic effect of the complex microorganisms on the surface of the bamboo substrate and the surface of the root system of the aquatic plant.

Description

Nitrate nitrogen purification system in surface water body

Technical Field

The utility model relates to a surface water body ecological remediation technical field specifically is a nitrate nitrogen purification system in surface water body.

Background

The total nitrogen pollution in the surface water body is mainly caused by nitrate, because nitrogen compounds in the surface water body are composed of ammonia nitrogen, nitrate nitrogen, nitrite nitrogen, organic nitrogen and the like, wherein the organic nitrogen, the ammonia nitrogen and the nitrite nitrogen can be converted into the nitrate nitrogen under the action of dissolved oxygen or artificial oxygenation in the surface water body, but the nitrate nitrogen has high concentration due to low C/N ratio in the surface water body, difficult utilization of organic matters and the like, and serious water body eutrophication pollution is caused.

The volume of the surface water body is large, the denitrification treatment of the surface water body by adopting the denitrification reactor is not intelligent, and the ecological treatment and restoration method is feasible. In order to reduce the occupied area and improve the utilization rate and the beautifying effect of the surface water body, the biological denitrification technical effect taking the ecological floating bed as the main force is not very obvious, and the main reasons are as follows: 1. the concentration of organic matters in the surface water body is low and difficult to utilize, nitrate nitrogen is removed very slowly, and an external liquid carbon source is unrealistic, so that secondary pollution is easily caused; 2. pollutants in surface water, including nitrate nitrogen, organic matters, planktonic microorganisms and the like, are valuable resources and should be fully utilized. And other organisms are utilized and converted to convert the pollutants into resources.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a nitrate nitrogen clean system in surface water to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a nitrate nitrogen purification system in a surface water body comprises a purification and water storage area, a combined type ecological floating bed area floating on the top of the water storage area, a submersible pump and a filter feeding animal area which are respectively arranged in the purification and water storage area, wherein a bamboo substrate is filled in the combined type ecological floating bed area, aquatic plants are planted in the bamboo substrate, and fishes are cultured in the purification and water storage area.

Preferably, the coverage rate of the combined ecological floating bed area on the water surface of the purification and water storage area is more than 10%.

Preferably, the bamboo substrate is a solid slow-release carbon source and comprises natural cellulose substances or artificially synthesized high polymers and the like.

Compared with the prior art, the beneficial effects of the utility model are that:

the solid slow-release carbon source can release a certain amount of carbon source for the biological denitrification process in the growth process, and the denitrification effect of the polluted water body is improved. The filter feeding animal area mainly realizes the mineralization of refractory organic matters in the water body and improves the biodegradation, assimilation and absorption of pollutants. The fishes realize the phagocytosis of the falling biomembrane and plankton in the floating bed system, and the updating of the biomembrane and the activity of the plankton are improved; the water body exchange driving unit strengthens the flow of the water body, reduces dead zones in the ecological purification system, and obtains better purification under the synergistic effect of the complex microorganisms on the surface of the bamboo substrate and the surface of the root system of the aquatic plant.

Drawings

FIG. 1 is a schematic structural view of the ecological purification system for polluted surface water body of the utility model;

labeled as: 1. a combined ecological floating bed area; 2. filter feeding animal area; 3. a submersible pump; 4. an aquatic plant; 5. a silk bamboo matrix; 6. fish species.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, the utility model provides a technical solution: a nitrate nitrogen purification system in a surface water body comprises a purification and water storage area, a combined type ecological floating bed area 1 floating on the top of the water storage area, a submersible pump 3 and a filter feeding animal area 2 which are respectively arranged in the purification and water storage area, wherein a bamboo substrate 5 is filled in the combined type ecological floating bed area 1, aquatic plants 4 are planted in the bamboo substrate 5, fishes 6 are cultured in the purification and water storage area, the combined type ecological floating bed area 1 accounts for the water surface coverage rate of the purification and water storage area to be more than 10%, and the bamboo substrate 5 is a solid slow-release carbon source and comprises natural cellulose substances or artificially synthesized high polymers and the like.

Constructing a novel combined ecological floating bed according to a soilless culture technology and a solid-phase denitrification technology, and taking natural cellulose substances or artificially synthesized high polymers as a growth substrate of the aquatic plants 4; the assimilation of the aquatic plant 4 and the metabolism of microorganisms on the surface of the substrate and the surface of the root system are utilized to realize the removal and conversion of pollutants, including the removal of nitrate nitrogen; because the natural cellulose substance and the artificially synthesized high polymer are growth substrates of the aquatic plant 4, the root system of the aquatic plant 4 can absorb rich nutrition and has good growth effect, the amount of root system secretion and the plant assimilation are enhanced, and the natural cellulose substance and the artificially synthesized high polymer can release a certain amount of organic carbon source for biological denitrification utilization, thereby realizing good biological denitrification process and effect, and the coverage rate of the combined ecological floating bed is about 20-30%. In order to improve the biomass and the food chain length of the combined ecological floating bed, plastic fillers are hung at the bottom of the combined ecological floating bed, so that the utilization effect of the space below the water surface is enhanced.

In addition, the surface water body contains a certain amount of refractory organic matters, floating algae and the like, most of which exist in a granular state, and a small amount of which exist in a dissolved state. The granular organic matters and the floating algae can form dissolved organic matters after the chubs are fed and decomposed by stocking the chubs (box feeding), so that the aim of resource utilization of the organic matters is fulfilled, and the organic matters are used as a biological denitrification carbon source; in addition, the dissolved organic matter is converted into the biodegradable organic matter for biological denitrification utilization through the filter feeding effect of the field snails (cultured in a box). The carbon source required by the denitrification of the water body is enriched by the mineralization and decomposition of the organic matters in the water body.

Filling a certain amount of solid slow-release carbon source (such as natural cellulose substance or artificially synthesized high polymer) in a cuboid frame with good water passing effect, and planting aquatic plants 4 suitable for the local area with a certain density in the solid slow-release carbon source to form a wetland type ecological floating bed with remarkable denitrification effect; in order to improve the biomass and the biological chain length, improve the effect and reduce the sludge yield, a certain amount of artificial synthetic filler (such as elastic three-dimensional filler or combined filler) is added at the bottom of the wetland type ecological floating bed, and the water surface coverage rate of the wetland type ecological floating bed is required to be more than 10 percent. On the basis, a certain amount of river snails and silver carps are respectively cultured in different net cages by utilizing a net cage culture mode, so that the resource utilization of organic matters and plankton which are difficult to utilize in the surface water body is facilitated, the organic matters which are difficult to utilize are converted into an organic carbon source which is easy to utilize, the denitrification effect of the water body is enhanced, and the organic matters are removed.

The wetland type ecological floating bed area 1 takes a solid slow-release carbon source as a growth substrate of the aquatic plant 4, and the solid slow-release carbon source can release certain trace elements in the using process to meet the growth requirement of the aquatic plant 4 and strengthen the growth effect of the aquatic plant 4; the huge specific surface area of the surface of the solid slow-release carbon source and the complex root system bacteria of the aquatic plant 4 provide environment for the growth of microorganisms, and the smooth proceeding of the biological denitrification and denitrification process is ensured. In addition, the solid slow-release carbon source can release a certain amount of carbon source for the biological denitrification process in the growth process, so that the denitrification effect of the polluted water body is improved. The filter feeding animal area 2 mainly realizes the mineralization of refractory organic matters in the water body and improves the biodegradation, assimilation and absorption of pollutants. The fish 6 can phagocytize the falling biomembrane and plankton in the floating bed system, and improve the renewal of the biomembrane and the activity of the plankton; the water body exchange driving unit strengthens the flow of the water body and reduces dead zones in the ecological purification system.

Specifically, the ecological purification system is developed based on the traditional ecological floating bed water quality mechanism, combines a soilless culture technology, a solid phase denitrification technology and a biological regulation and control technology, optimizes the growth and purification microenvironment of microorganisms, filter feeding animals, fishes 6 and aquatic plants 4, utilizes the coupling purification process among different species, is an ecological purification system for purifying water quality by depending on animals and plants, strengthens the cooperation relationship among the filter feeding animals, the aquatic plants 4, the fishes 6, the microorganisms and the like, and finally obtains a device for quickly purifying polluted surface water under the combined action of the animals, the plants and the microorganisms. Particularly, the method is realized by means of the common processes of strengthening the growth of the aquatic plants 4 by the silkbamboo substrate 5 and releasing the organic carbon source by decomposing the silkbamboo filler by the filter feeding effect of filter feeding animals.

After the polluted surface water body enters the ecological purification system, the polluted surface water body is quickly mixed and exchanged under the action of the submersible pump 3, and good water body circulation and oxygenation effects are obtained; the granular pollutants in the water body are firstly phagocytized by the fishes 6 and then excreted to form pollutants which are easy to putrefy, the pollutants are converted into low molecular pollutants under the action of decomposing bacteria, and the low molecular pollutants are converted into pollutants which are easy to degrade under the action of filter feeding of the filter feeding animals 2. Pollutants (including organic matters, ammonia nitrogen, nitrate nitrogen and the like) which are easy to degrade are purified in the combined ecological floating bed area 1, and particularly, the pollutants are better purified under the synergistic action of complex microorganisms on the surfaces of the bamboo substrate 5 and the surfaces of 4 roots of aquatic plants.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a nitrate nitrogen purification system in surface water, floats in the ecological bed district (1) that floats of combination formula at water storage district top including purifying the water storage district, places respectively and locates purifying inside immersible pump (3) of water storage district and filter feeding nature animal district (2), its characterized in that: the combined ecological floating bed is characterized in that a bamboo substrate (5) is filled in the combined ecological floating bed area (1), aquatic plants (4) are planted in the bamboo substrate (5), and fishes (6) are cultured in the purification and water storage area.

2. The system of claim 1 for purifying nitrate nitrogen in surface water bodies, wherein: the combined ecological floating bed area (1) occupies the water surface coverage rate of the purification and water storage area more than 10 percent.

3. The system of claim 1 for purifying nitrate nitrogen in surface water bodies, wherein: the silk bamboo matrix (5) is a solid slow-release carbon source.