CN213265897U

CN213265897U - Three-dimensional aeration biofilm reactor

Info

Publication number: CN213265897U
Application number: CN202020757579.7U
Authority: CN
Inventors: 蒋山泉; 李强; 邓小红; 孙向卫; 凌立新
Original assignee: Chongqing University of Arts and Sciences
Current assignee: Chongqing University of Arts and Sciences
Priority date: 2020-05-10
Filing date: 2020-05-10
Publication date: 2021-05-25
Anticipated expiration: 2030-05-10

Abstract

A biomembrane reactor with three-dimensional aeration is characterized in that a flexible fiber bundle biomembrane is adopted, an aeration device is combined with a filler carrier, an aeration hose is a fiber bundle suspension carrier, the lower end of the aeration hose is connected with an air inlet pipe, and a whole biomembrane packing layer is an aeration area. Has the characteristics of high aeration efficiency and low treatment cost.

Description

Three-dimensional aeration biofilm reactor

Technical Field

The utility model belongs to the sewage treatment field particularly relates to a biomembrane sewage treatment process and equipment.

Background

With the rapid development of economy, the development of urban infrastructure cannot keep up with the increase of population, and a large amount of domestic sewage is directly discharged into nearby water bodies without being treated. Many urban rivers accept a large amount of sewage, far exceed the self-purification capacity, the serious organic pollution causes the rapid consumption of dissolved oxygen in water, and the rivers present an anaerobic state, thus seriously affecting the production, life and regional water environment quality of towns and residents, even hindering the development of cities. Development of effective treatment techniques to control pollution and restore the destroyed river ecosystem has become an urgent need.

In recent years, the biofilm technology is widely researched and adopted as a technology for treating water pollution. Because the biomembrane technology can fixedly enrich a large amount of microorganisms with degradation function in unit space, compared with the removal of organic matters, ammonia nitrogen and other biodegradable pollutants in sewage, the biomembrane technology becomes one of the biological treatment technologies which adopt more and effective polluted water bodies. However, the biofilm process is a fixed biological layer, the condition for oxygenating the interior of the biofilm is inherently insufficient, and aeration and oxygenation always face a plurality of restrictions. The aeration mode of the biomembrane method is generally blast microporous aeration, and has the following defects:

the traditional aerator has uneven aeration: the disc type aeration device and the tubular type aeration device are dispersedly arranged at the bottom of the pool, the direct aeration area is very limited and is only about 5 percent, the oxygen supply of other areas is completed by the diffusion formed by the flowing of gas or water, and the distribution of the aeration mode is uneven, so that the uniform demand of microorganisms on oxygen is difficult to ensure.

The oxygenation efficiency is not high: the traditional aeration mode is local aeration, the aeration is relatively concentrated, the local strength is overlarge, vertical water waves can be caused, bubbles are spread at a very high speed, the particle size of the added bubbles is large, the rising speed of the bubbles is relatively large, the contact time of the bubbles and water is insufficient, and the oxygenation coefficient is not large.

Direct utilization of oxygen is limited: when the aeration is carried out at the bottom of the tank, the area of the tank bottom is limited, and the aeration quantity needs to be quite large, so that the aperture of the aeration device is large, the generated bubbles are larger, and the dissolution of oxygen in water is inversely related to the diameters of the bubbles.

Aiming at the difficulties, the three-dimensional aeration biofilm reactor is provided, the demand for controlling water pollution is continuously increased, the requirement for effective and economic treatment of various waste water is met, and a more effective waste water treatment facility is provided.

Disclosure of Invention

An object of the utility model is to provide a biofilm reactor of three-dimensional aeration to solve the problem that proposes among the above-mentioned background art.

Each reaction tank is 8-10m long, 3m wide and 5m high, each reaction tank accommodates a plurality of biomembrane packing frame units, and the two reaction tanks are arranged in parallel to form a reactor. The frame structure of the biomembrane packing layer is about 4m high, and each frame is internally provided with a hanging frame for hanging and filling the fiber bundle membrane. The fiber bundle membrane adopts a flexible fiber bundle biological membrane, the aeration hose serves as a hanging frame and a carrier for hanging the biological bundle for the fiber bundle, and the lower end of the aeration hose is connected with an air inlet pipe.

The combination of an aeration device and a filler carrier is the characteristic of the invention, and the microporous hose is adopted for aeration and is also used as a hanging frame of a fiber bundle membrane.

The aeration hose is also used as a hanging rack for flexible filler, the whole filler area is vertically arranged and filled with the flexible filler, the interval is only 20-30 cm, thousands of micro-pores with the pore diameter of 10-30 mu m are arranged on each meter of hose, and uniform and fine bubbles can be generated during aeration. Because the aeration hose is arranged along the filler area in a three-dimensional way, the whole filler area becomes an aeration area, and fine bubble aeration operation with large surface area can be carried out, so that the water body in the area can be effectively aerated.

The aeration hose is made of rubber, the upper end of the aeration hose is suspended on a hanging frame of the biomembrane framework, the lower end of the aeration hose is connected with the air inlet pipe through a loose joint, and the air inlet pipe is laid at the bottom of the tank in parallel and is connected with the main aeration pipe, so that the aeration area and the biomembrane packing layer are ensured to be in the same space.

The filler is flexible fiber bundles, has the advantages of large specific surface area and strong adsorption capacity, is installed in a hanging mode, the fiber bundles are uniformly distributed on the aeration hoses, the aeration hoses are fixed in the biological membrane frame, and the whole biological membrane frame is positioned on the support.

The water outlet of the water inlet pipeline is positioned in a water inlet weir of the biofilm reactor, a water outlet groove at the water inlet of the water outlet pipeline is provided with a water inlet pump, and the water outlet pipeline is sequentially provided with a pressure gauge and a water outlet pump from left to right.

Has the advantages that:

aeration is uniform: the aeration devices are distributed in the reactor, the direct aeration area is very wide and is about 80% or higher, the oxygen supply of other areas is completed by the diffusion formed by the flow of gas or water, and the aeration mode is uniform in distribution, so that the requirement of microorganisms on oxygen is better ensured.

The oxygenation efficiency is high: aeration is relatively dispersed, the aeration port is arranged below the fiber bundle membrane, bubbles are spread at a very high speed, the fiber bundle full of the biological membrane cuts the bubbles, and the migration of oxygen to the biological membrane is accelerated.

Direct utilization of accelerated oxygen: the bubbles generated during aeration by adopting the aeration hose are extremely fine, the diameters of the bubbles are only 10-30 mu m, most of the bubbles are directly attached to the activated sludge, so that good and effective micro-mixing between the sludge and water is realized, and the direct utilization of oxygen in the bubbles by microorganisms is accelerated.

The deep and effective removal of COD and SS in the domestic sewage has good removal effect on TP and TN.

Drawings

FIG. 1 is a schematic plan view of the apparatus of the present invention; fig. 2 is a schematic side view of the apparatus of the present invention, fig. 3 is a plan view of the apparatus of the present invention, and fig. 4 is a structural view of an aeration hose.

In the figure, 1 reactor, 2 fiber bundle biomembrane, 3 aeration hose, 4 water inlet pipe, 5 main aeration pipe, 6 hanger, 7 biomembrane frame, 8 reactor water level, 9 water outlet groove, 10 water outlet pipe, 11 support, 12 support, 13 loose joint, 14 isolation wall, 15 aeration hole and 16 air inlet pipe.

Detailed Description

The technical proposal of the utility model is clearly and completely described by referring to the attached drawings of the device and combining the sewage treatment process. The utility model provides a three-dimensional aeration biofilm reactor as shown in figures 1-4:

(1) water inflow: continuously injecting sewage to be treated into the reactor 1 through a water inlet pipe 4 by a water inlet pump, keeping the water level 8 constant, uniformly suspending the whole fiber bundle membrane 2 on a hanger 6 in a biomembrane frame 7, placing the biomembrane frame on a support 11 at the bottom of the reactor through a lower support 12, filling more than 80% of the space of the reactor with the biomembrane, and submerging the reactor in the treated water as shown in figure 2;

(2) reaction: blast aeration, wherein air enters the water body through the main aeration pipe 5 and the air inlet pipe 16 through aeration holes 15 arranged on the aeration hose 3 and is dissolved in the water body to provide oxygen for biochemical reaction, as shown in figure 3;

(3) water outlet: through the outlet tank 9 and the outlet pipe 10, the treated water is continuously discharged, as shown in figure 3, and the hydraulic retention time is 6 h.

Claims

1. a biofilm reactor of three-dimensional aeration, it is characterized in that: the processing unit of this biofilm reactor is a biofilm frame, and the filler is a flexible fiber bundle biofilm, and the aeration hose is aerated, and the aeration hose is suspended. On the frame, the lower end of the aeration hose is connected with the intake pipe through a slip-knot. The aeration hose doubles as a hanger for flexible packing, filling the entire packing area with an interval of 20~30cm. There are thousands of aeration hoses per meter. Each micro-pore with a diameter of 10-30 μm can generate uniform fine air bubbles during aeration, the fiber bundles are evenly distributed on the aeration hose, and the entire biofilm frame is located on the support.

2 . The biofilm reactor for stereo aeration according to claim 1 , wherein the basic unit of the reactor is a biofilm frame, and the aeration hose hanger is located in the frame. 3 .

3 . The biofilm reactor for three-dimensional aeration according to claim 1 , wherein the air pipes at the bottom of the pool are laid in parallel. 4 .

4 . The biofilm reactor with three-dimensional aeration according to claim 1 , wherein the support is located at the bottom of the reactor. 5 .