CN101323484A - Nested Multidimensional Membrane Module Dynamic Membrane Bioreactor - Google Patents

Abstract

The invention provides a nested multi-dimensional membrane module dynamic membrane bioreactor, including a bed body, an aeration pipeline and a multi-dimensional membrane module, the bed body is divided into an aeration area and a dynamic membrane bioreaction area, and the aeration area of the bed body There is a water inlet on one side, an aeration pipe on the bottom, a sludge outlet and an outlet pipe on one side of the dynamic membrane bioreaction area, and a backwash aeration pipe is connected to the outlet pipe, and at least one set of multi-dimensional membranes is fixed in the bed Module, each group of multi-dimensional membrane modules is composed of at least two layers of three-dimensional frames set inside and outside. The three-dimensional frames of each layer increase sequentially from the inside to the outside. The pore size of the filter screen on the three-dimensional frame increases sequentially, and the gaps are filled with fillers. There are conduits in the innermost three-dimensional frame, and the conduits in each group of multi-dimensional membrane modules are connected to the outlet pipes on the bed body. The invention is not easy to be blocked, has high treatment efficiency, good effluent quality, can treat various waste water, has stable operation and long service life.

Description

Nested Multidimensional Membrane Module Dynamic Membrane Bioreactor

technical field

The invention relates to a dynamic membrane bioreactor for sewage treatment and belongs to the technical field of sewage purification.

Background technique

Membrane bioreactor is a new type of water treatment technology that organically combines membrane separation technology and biological process. It replaces the secondary settling tank with membrane modules. It has the advantages of self-control, high concentration of activated sludge and low output of residual sludge.

The Chinese patent with the notification number CN100384520C discloses a "Three-dimensional Filter Cloth Dynamic Membrane Bioreactor". The dynamic membrane bioreactor can effectively reduce membrane clogging, delay membrane fouling, prolong the backwash cycle of the reactor and the service life of the membrane substrate, and increase the stability of the reactor operation. However, the membrane material used is cloth material, which is easy to cause membrane fouling (that is, membrane clogging) during operation, and the water output is small, which requires frequent and repeated washing, and consumes a lot of energy.

Contents of the invention

The present invention aims at the deficiencies of the existing membrane bioreactor technology, and provides a nested multi-dimensional membrane module dynamic membrane bioreactor with large unit membrane area, not easy to be blocked, capable of further improving purification ability and good effluent quality.

The nested multi-dimensional membrane module dynamic membrane bioreactor of the present invention adopts the following technical scheme:

Nested multi-dimensional membrane module dynamic membrane bioreactor, including bed body, aeration pipeline and multi-dimensional membrane module, the bed body is divided into aeration area and dynamic membrane bioreaction area, and the side of the aeration area of the bed body is provided with a water inlet , there is an aeration pipe at the bottom, and a sludge outlet and an outlet pipe are provided on one side of the dynamic membrane bioreaction area. The outlet pipe is connected with a backwash aeration pipe. The component is composed of at least two layers of frames set inside and outside. The frames of each layer increase sequentially from the inside to the outside. The periphery of each frame is wrapped with a filter screen. The aperture of the filter screen on each layer of the frame increases sequentially from the inside to the outside. , and the gaps between the adjacent two frames are filled with fillers, the innermost frame is provided with conduits, and the conduits in each group of multidimensional membrane modules are connected to the outlet pipes on the bed body.

The filler is a hard filler, at least one of ceramsite, activated carbon, charcoal, stone, sand and concrete.

The volume of the filler particles becomes smaller as it goes into the frame, so that a three-dimensional structure is formed between each layer of fillers.

The frame is any solid geometric shape.

The multi-dimensional membrane module in the present invention is constituted in a nested form, and the apertures of the filter screens of each layer frame increase sequentially from the inside to the outside to remove pollutants layer by layer. During operation, sewage flows in through the water inlet on the bed body, and under aeration conditions, microorganisms multiply in large numbers, thereby forming a large number of biofilms on the membrane modules to improve treatment efficiency. When the sewage passes through the multi-dimensional membrane module covered with biofilm, the particles with larger pore size are directly intercepted by the outer three-dimensional frame, while the fine particles and soluble substances are filtered by the dynamic membrane with small pore size on the three-dimensional frame in the inner layer, and are purified The sewage reaches the innermost three-dimensional frame lumen, and then flows out through the water outlet connected to the innermost three-dimensional frame inner cavity. The remaining sludge is discharged from the sludge outlet.

The multi-dimensional membrane module of the present invention is not easy to block, easy to backwash, high in treatment efficiency, good in effluent quality, can be reused directly, realizes the recycling of sewage, can treat a variety of waste water, has stable operation, long service life, simple structure, easy operation, It is easy to operate and easy to realize automatic control.

Description of drawings

The accompanying drawing is a structural schematic diagram of the nested multi-dimensional membrane module dynamic membrane bioreactor of the present invention.

In the figure: 1. Bed body, 2. Water inlet pipe, 3. Water distribution plate, 4. Multidimensional membrane module, 5. Sludge outlet, 6. Valve, 7. Air compressor, 8. Aeration pipe, 9. Outlet Water pipe, 10, conduit, 11, filter screen, 12, filler, 13, backwash aeration pipe, 14, valve, 15, valve, 16, frame.

Detailed ways

As shown in the drawings, the nested multidimensional membrane module dynamic membrane bioreactor of the present invention mainly includes a bed body 1, an aeration pipeline 8 and a multidimensional membrane module 4, and a water distribution plate 3 is arranged in the bed body 1, and the bed body 1 is divided into an aeration zone and a dynamic membrane bioreaction zone. A water inlet pipe 2 is provided at the bottom of one side of the aeration zone of the bed body 1, and an aeration pipeline 8 is provided at the bottom. The aeration pipeline 8 is connected to an external air compressor 7 connection, a valve 6 is installed on the connecting pipe; a mud outlet 5 is provided at the bottom of one side of the dynamic membrane bioreaction area of the bed body 1, and an outlet pipe 9 is arranged on the upper part, and a valve 15 is installed on the outlet pipe 9, and the outlet pipe 9 and A backwashing aeration pipe 13 is connected between the air compressors 7, and a valve 14 is installed on the backwashing aeration pipe 13 to realize backwashing of the multi-dimensional membrane module. Valves are installed on the water inlet pipe 2, the mud discharge port 5 and the water outlet pipe 9. The multi-dimensional membrane modules 4 are fixed at the bottom of the dynamic membrane bioreaction area in the bed body 1. The number of multi-dimensional membrane modules 4 set in the bed body 1 is determined according to the size of the bed body 1. In this embodiment, there are two sets of multi-dimensional membrane modules. The water outlet pipe 9 on the bed body 1 is connected with the conduit 10 in each group of multi-dimensional membrane modules.

The multi-dimensional membrane assembly 4 is composed of at least two layers of three-dimensional structure frame 16 set inside and outside. The multi-dimensional membrane assembly in this embodiment has four layers, and the frames of each layer increase sequentially from the inside to the outside. The top is wrapped with a filter screen 11, and the pore size of the filter screen on each frame from the inside to the outside increases sequentially, and fillers 12 are filled between two adjacent three-dimensional frames. In order to form a three-dimensional structure between the various layers of fillers to ensure the quality of the effluent. A conduit 10 is arranged in the inner cavity of the innermost frame, and the conduit 10 is connected with the water outlet pipe on the bed body 1 . The filler 12 is one or a mixture of hard fillers such as ceramsite, activated carbon, charcoal, stone, sand and concrete.

The frame 16 can be in any three-dimensional geometric shape, and can be welded with stainless steel or hard aluminum alloy, and the filter screen 11 can be made of stainless steel or engineering plastics. When the strength of the filter screen 11 was sufficient, the frame 16 could also directly be surrounded by the filter screen.

Sewage treatment process of the present invention is:

Sewage enters the bed body 1 from the water inlet pipe 2, flows through the aeration area where the aeration pipe 8 is located, produces a large number of microorganisms, and then enters the dynamic membrane bioreaction area through the water distribution plate 3. When aeration, close valve 14, open valve 6, and carry out aeration. In the dynamic membrane bioreaction area, microorganisms form a large number of biofilms on the multi-dimensional membrane module 4, and the sewage is filtered through the layers of the filter screen in the multi-dimensional membrane module 4 into the inner cavity, and the water quality is purified, and the larger particles are removed by the outer layer. The biofilm on the large-pore filter screen intercepts the flow, and the fine particles and soluble substances are filtered through the inner filter screen, thereby greatly improving the purification effect. The treated sewage flows out through the outlet pipe 9 on the bed body 1 through the inner cavity conduit 10 of the multidimensional membrane module 4 . The sludge is discharged from the sludge outlet 5. After running for a period of time, when the multidimensional membrane module 4 needs to be backwashed, the valve 6 and the valve 15 are closed, and the valve 14 is opened for backwashing.

Claims (4)

1. nesting type multidimensional membrane assembly dynamic membrane bioreactor, comprise a body, aerated conduit and multidimensional membrane module, be divided into aeration zone and dynamic film bio reaction zone in the bed body, aeration zone one side of bed body is provided with water-in, the bottom is provided with aerated conduit, be provided with mud discharging mouth and rising pipe in dynamic film bio reaction zone one side, be connected with the back flushing aeration tube on the rising pipe, it is characterized in that: be fixed with one group of multidimensional membrane module at least in the bed body, every group of multidimensional membrane module is made up of the two-layer at least framework of about suit, each layer framework increases from the inside to the outside successively, the periphery of every layer of framework all is enclosed with filter screen, the aperture of each layer framework upper filter screen increases successively from the inside to the outside, and all be filled with filler in the slit between the adjacent two layers framework, be provided with conduit in the inner chamber of the inside framework, the conduit in every group of multidimensional membrane module all is connected with rising pipe on the body.

2. nesting type multidimensional membrane assembly dynamic membrane bioreactor according to claim 1 is characterized in that: described filler is a hard filler, is a kind of in haydite, gac, charcoal, stone, sand and the concrete body at least.

3. nesting type multidimensional membrane assembly dynamic membrane bioreactor according to claim 1 is characterized in that: the past more framework nexine of the volume of described filler particles is more little.

4. nesting type multidimensional membrane assembly dynamic membrane bioreactor according to claim 1 is characterized in that: described framework is any solid geometry shape.

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