CN210457633U

CN210457633U - Multi-element fluidized bed microorganism contact filler for water treatment

Info

Publication number: CN210457633U
Application number: CN201920570718.2U
Authority: CN
Inventors: 洪知; 洪树虎; 周奕君
Original assignee: Wuxi Hesi Environmental Technology Co ltd
Current assignee: Jiangsu HESI Environmental Protection Technology Co.,Ltd.
Priority date: 2019-04-24
Filing date: 2019-04-24
Publication date: 2020-05-05
Anticipated expiration: 2029-04-24

Abstract

The utility model provides a multi-element fluidized bed microorganism contact filler for water treatment, which comprises a latticed shell (1) and a filler (2) arranged in the latticed shell (1); the filler (2) is a group of sponge fillers with different pore sizes. The multi-element fluidized bed microorganism contact filler for water treatment has the advantages of simple structure, low cost and good effect.

Description

Multi-element fluidized bed microorganism contact filler for water treatment

Technical Field

The utility model belongs to the water treatment field, in particular to a water treatment is with many first fluidized bed microorganism contact filler.

Background

With the development of modern cities, the amount of industrial wastewater and domestic sewage increases year by year, the problem of urban water pollution is increasingly prominent, and the treatment of water pollution becomes an important link for the economic and social development of various regions. The biological treatment method of the wastewater is developed from the end of the 19 th century to the present, and becomes a main means for treating urban domestic sewage and industrial wastewater in various countries of the world, and a new technology and a new process are rapidly developed. The biological treatment method of wastewater can be divided into two main categories of aerobic biological treatment and anaerobic biological treatment, and the aerobic biological treatment is always the main treatment method in the wastewater treatment field.

The aerobic biological treatment method can be basically classified into two categories according to the difference of microorganism growth environment, aggregation form and the like in the aeration tank. The first type of process, which may be referred to as a suspended sludge process, mainly includes a conventional activated sludge process and its variants, such as a staged aeration process, a gradual reduction aeration process, a complete mixed activated sludge process, a sequencing batch activated sludge process (SBR), a biosorption oxidation process (AB process), a delayed aeration process, an oxidation ditch, etc. In the method, microorganisms, suspended substances, colloidal substances and the like are mixed together to form floccule particles with strong organic matter adsorption and decomposition capacity. The second method is a biofilm method (or called attached sludge method), such as a biological filter, a tower biological filter, a biological rotating disc, a contact oxidation method and the like. The method is characterized in that the biological growth or the fixed growth is carried out or attached to the surface of a solid filler (or a carrier). Among them, the contact oxidation method has been used in many engineering applications in recent years because of its advantages of high BOD load, short treatment time, and load impact resistance.

The treatment method of the fluidized bed biomembrane (internal circulation biological fluidized bed) is to combine the activated sludge method and the biomembrane method, and in the biological fluidized bed, air-sewage-carrier attached with the biomembrane carry out biological reaction in the fluidized bed, which can bear higher BOD load.

The technological principle of the fluidized bed biofilm treatment technology (MBBR) is that a certain amount of suspension carriers are added into a reactor to improve the biomass and the biological species in the reactor, so that the treatment efficiency of the reactor is improved. As the density of the filler is close to that of water, the filler is completely mixed with the water during aeration, and the environment for the growth of microorganisms is three phases of gas, liquid and solid. The collision and shearing action of the carrier in water makes air bubbles finer, and the utilization rate of oxygen is increased. In addition, each carrier has different biological species inside and outside, anaerobic bacteria or facultative bacteria grow inside, and aerobic bacteria grow outside, so that each carrier is a micro-reactor, nitrification reaction and denitrification reaction exist simultaneously, and the treatment effect is improved.

The MBBR technology has the advantages of both a traditional fluidized bed and a biological contact oxidation method, is a novel efficient sewage treatment method, ensures that a carrier is in a fluidized state by means of aeration in an aeration tank and the lifting action of water flow, further forms activated sludge for suspension growth and a biomembrane for attachment growth, so that the biomembrane for the moving bed uses the space of the whole reactor, fully exerts the advantages of both attachment phase and suspension phase organisms, makes the organisms benefit from the advantages of both attachment phase and suspension phase organisms, and supplements each other. Unlike previous packings, suspended packings are called "mobile biofilms" because they are able to come into contact with the sewage many times.

The fluidized bed biofilm treatment technology (MBBR) needs to use a suspension carrier, the selection of the filler is particularly important, and naturally formed porous filler has good adsorbability but is easy to break, and the porosity cannot be fully utilized; the artificially synthesized filler is generally of a single-specification coarse hole type and is not suitable for microbial biofilm formation of low-concentration wastewater; meanwhile, the current commonly used carrier is light filler, the surface of the filler is smooth, microorganisms are not easy to form a film under the condition of low organic matter content, the filler becomes heavy after being used for a period of time, and sinks to the bottom of the pool, only the filler can be replaced, the cost is high, and the treatment effect is seriously influenced. If the sponge is directly used, the filler is easy to sink after being cemented and is easy to break when being stirred.

SUMMERY OF THE UTILITY MODEL

The technical problem is as follows: in order to solve the defects of the prior art, the utility model provides a multielement fluid bed microorganism contact filler for water treatment.

The technical scheme is as follows: the utility model provides a multi-element fluidized bed microorganism contact filler for water treatment, which comprises a latticed shell (1) and a filler (2) arranged in the latticed shell (1); the filler (2) is a group of sponge fillers with different pore sizes.

As an improvement, the sponge filler comprises sponge filler with the aperture of phi 0.5-1.5mm and sponge filler with the aperture of phi 2-4 mm.

As an improvement, the latticed shell (1) is a spherical latticed shell, a square latticed shell or an irregularly-shaped latticed shell.

As an improvement, the latticed shell (1) is formed by splicing a plurality of surface units, and the connection between contact frames of any two adjacent surface units is tenon-and-mortise connection or buckle connection; or the latticed shell (1) is an integrally formed latticed shell.

As an improvement, the mesh size of the maximum mesh on the latticed shell (1) is smaller than the size of the minimum filling filter material in the filling filter materials.

As an improvement, a fluidized bed comprising the microorganism contact packing described above.

Has the advantages that: the utility model provides a many first fluidized bed microorganism contact filler for water treatment simple structure, low cost, it is effectual.

Firstly, the latticed shell is smaller than 1, and the sponge filler has a slightly heavier specific gravity or is close to 1 after being subjected to mud forming, so that the overall specific gravity of the latticed shell coated filler is close to 1 during operation, and the suspended state can be ensured, and the filler can still be suspended in water when the gravity is increased after the mud forming;

secondly, because the aperture of filler differs to have thinner thickness, under the prerequisite of guaranteeing the effect of oxygenating, the big aperture filler mainly perches good oxygen, oxygen deficiency fungus, and the inside anaerobe that can have of little aperture filler exists, different biological species, synergistic effect to the treatment effect has been improved.

Thirdly, different fillers have different pore diameters, so that the adsorbed gas is different, the density is different, mutual friction can be formed during aeration rolling, and metabolism of microorganisms on the surfaces of the fillers is promoted.

Fourthly, under the condition of low organic matter concentration, the filler with a specific pore diameter has a net catching effect when rolling, can catch free microorganisms, and can avoid the problem of excessive loss of the microorganisms. Meanwhile, oxygen cannot penetrate through the filler, so that excessive self-oxidation of microorganisms is avoided.

Fifthly, as the filler is of a porous structure, the filler can adsorb micro bubbles, thereby increasing the retention time of air and improving the utilization rate of oxygen.

Drawings

Fig. 1 is a schematic structural view of a microorganism-contacting packing of a multi-component fluid bed for water treatment in example 1.

Fig. 2 is a schematic structural view of the multi-component fluidized bed microbial contact packing for water treatment of example 2.

Detailed Description

The multi-element fluidized bed packing of the present invention will be further described below.

Example 1

The microbial contact packing of the multi-element fluid bed for water treatment comprises a latticed shell (1) and a packing (2) arranged in the latticed shell (1); the filler (2) is a group of sponge fillers with different pore sizes.

The sponge filler comprises sponge filler with the aperture of phi 0.5-1.5mm and sponge filler with the aperture of phi 2-4 mm.

The latticed shell (1) is a spherical latticed shell; the latticed shell (1) is formed by splicing two identical hemispherical surface units, and the two identical hemispherical surface units are connected through a buckle.

The size of the maximum grid on the grid-shaped shell (1) is smaller than the size of the minimum filling filter material in the filling filter materials.

Example 2

The latticed shell (1) is a square latticed shell. The latticed shell (1) is an integrally formed latticed shell.

Claims

1. A multi-element flowing bed microorganism contact filler for water treatment is characterized in that: comprises a latticed shell (1) and a filler (2) arranged inside the latticed shell (1); the filler (2) is a group of sponge fillers with different pore sizes.

2. A multi-component fluid bed microbial contact packing for water treatment as claimed in claim 1, wherein: the sponge filler comprises sponge filler with the aperture of phi 0.5-1.5mm and sponge filler with the aperture of phi 2-4 mm.

3. A multi-component fluid bed microbial contact packing for water treatment as claimed in claim 1, wherein: the latticed shell (1) is a spherical latticed shell, a square latticed shell or an irregularly-shaped latticed shell.

4. A multi-component fluid bed microbial contact packing for water treatment as claimed in claim 1, wherein: the latticed shell (1) is formed by splicing a plurality of surface units, and the connection between contact frames of any two adjacent surface units is tenon-and-mortise connection or buckle connection; or the latticed shell (1) is an integrally formed latticed shell.

5. A multi-component fluid bed microbial contact packing for water treatment as claimed in claim 1, wherein: the size of the maximum grid on the grid-shaped shell (1) is smaller than the size of the minimum filling filter material in the filling filter materials.

6. A fluid bed comprising microorganism contacting packing according to any one of claims 1 to 5.