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Online cleaning roll-type membrane bioreactor

A bioreactor, rolled membrane technology, applied in sustainable biological treatment, biological water/sewage treatment, membrane technology, etc., can solve the problems of large one-time investment, low filling density, high operating energy consumption, and achieve infrastructure investment. The effect of saving, high packing density and reducing operating energy consumption

Active Publication Date: 2011-11-16
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the hollow fiber membrane has a high packing density, but it is troublesome to clean after contamination; the flat plate membrane has the advantages of good anti-pollution performance, high flux, and easy replacement, and is widely used in MBR, but the packing density is low, and if used On-line cleaning requires more mechanical cleaning devices and a large one-time investment
[0006] In addition, submerged membrane-bioreactors use aeration to control membrane fouling. Compared with conventional biological treatment processes, the amount of aeration is significantly larger and the energy consumption for operation is higher.

Method used

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  • Online cleaning roll-type membrane bioreactor
  • Online cleaning roll-type membrane bioreactor
  • Online cleaning roll-type membrane bioreactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The diaphragm 7 is made of polyvinylidene fluoride (PVDF), and the mechanical cleaning device 6 is made of a brush. It was applied to the treatment of catering wastewater in a large supermarket. Reactor sludge concentration MLSS=22g / L. Membrane operating flux is 8~10L / m 2 h, after 27 days of stable operation, reach the end of the operation. The influent COD concentration is 1031±171.2mg / L, the effluent COD concentration is 79±17.2mg / L, and the average removal rate is 92.3%. After online physical cleaning, the membrane flux recovery rate can reach 59.7%.

Embodiment 2

[0027] Diaphragm 7 is made of polyethersulfone (PES), and mechanical cleaning device 6 is made of sponge. It is applied to the aerobic biological treatment of urban domestic sewage. Reactor sludge concentration MLSS=7g / L, membrane operating flux is 20L / m 2 h, after 13 days of stable operation, reach the end of the operation. The influent COD concentration is 286.0±71.2mg / L, the effluent COD concentration is 21±4.3mg / L, and the average removal rate is 92.6%. After online physical cleaning, the membrane flux recovery rate can reach 64.0%.

Embodiment 3

[0029] The diaphragm 7 is made of polyvinylidene fluoride (PVDF), and the mechanical cleaning device 6 is made of a brush. It is applied to the aerobic biological treatment of urban domestic sewage. Reactor sludge concentration MLSS=8g / L, membrane operating flux is 20L / m 2 h, after 19 days of stable operation, reach the end of the operation. The influent COD concentration is 286.0±71.2mg / L, the effluent COD concentration is 20±4.3mg / L, and the average removal rate is 93.0%. After online physical cleaning, the membrane flux recovery rate can reach 67.9%.

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Abstract

The invention discloses an online cleaning roll-type membrane bioreactor, relates to sewage treatment technology of a membrane bioreactor, and is suitable for treating sewage and purifying slightly polluted water. After the sewage enters a bioreactor (1) through a water distribution system (2), degradation and transformation of a pollutant are performed; and under the action of a suction pressure, solid-liquid separation is realized by utilizing a roll-type membrane component. The roll-type membrane component consists of a membrane (7), a scroll (5), a mechanical cleaning device (6) and a rocking handle (4), and is fixedly arranged in the bioreactor (1); and when a membrane needs to clean, online physical cleaning is performed by using the mechanical cleaning device (6) arranged on the roll-type membrane component. The online cleaning roll-type membrane bioreactor has the advantages of high packing density, low aeration energy consumption, small occupied area, infrastructure investment conservation, convenient cleaning and the like, and has good economic benefit, social benefit and convenient popularization and application.

Description

technical field [0001] The online cleaning roll-type membrane-bioreactor relates to membrane-bioreactor sewage treatment technology, and is suitable for sewage treatment and micro-polluted water purification. Background technique [0002] Membrane Bioreactor (MBR for short) replaces the secondary settling tank with a membrane unit. Since all suspended solids and colloidal substances are separated and retained by the membrane, the sedimentation performance of the sludge will not affect the quality of the effluent water, basically solving the problem of traditional activity. The problem of sludge bulking in the sludge method; on the other hand, the membrane separation unit increases the concentration of activated sludge in the aeration tank, increases the rate of biodegradation, and reduces the amount of biological sludge produced. Therefore, MBR is widely used in domestic sewage and industrial wastewater treatment engineering practice. [0003] During the operation of MBR, m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D65/02C02F3/12C02F3/10
CPCY02W10/10
Inventor 吴志超王志伟张新颖童君陆风海麦穗海王荣生
Owner TONGJI UNIV
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