Anaerobic-Aerobic Dynamic Membrane Fouling Control Method Using Immobilized Quorum Sensing

A quorum sensing and dynamic membrane technology, which is applied in chemical instruments and methods, water pollutants, aerobic and anaerobic process treatment, etc., can solve the problems of high cost of membrane modules, membrane pollution, etc., and achieve high operating costs and alleviate membrane pollution. Pollution, large power consumption effect

Active Publication Date: 2020-12-08
XIAMEN UNIV
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide an anaerobic-aerobic dynamic method using immobilized quorum sensing that can achieve relatively efficient and long-lasting membrane fouling control in view of the high cost of membrane modules and the problems of membrane fouling during operation in the existing MBR water treatment. Membrane fouling control method

Method used

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  • Anaerobic-Aerobic Dynamic Membrane Fouling Control Method Using Immobilized Quorum Sensing
  • Anaerobic-Aerobic Dynamic Membrane Fouling Control Method Using Immobilized Quorum Sensing
  • Anaerobic-Aerobic Dynamic Membrane Fouling Control Method Using Immobilized Quorum Sensing

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Embodiment 1

[0031] The quorum-sensing quenching bacterium Rhodococcus erythropolis was cultured in LB medium for 24 hours, centrifuged and resuspended in deionized water, and the bacterial suspension was prepared as the immobilized bacterial species. Bacteria suspension was mixed with sterile sodium alginate at a ratio of 1:20 to prepare bacteria-sodium alginate suspension. Add 10% (w / v) CaCl dropwise to the bacteria-sodium alginate suspension 2 solution at 4 °C in CaCl 2 Soak in the solution for 24 hours, wash with water, store at 4°C, and store in deionized water. When the immobilized pellets are used, they are put into the sewage treatment system, and after 7 days of activation and domestication, the enrichment of quorum induction quenching bacteria can be completed. The obtained immobilized pellets have an average particle diameter of 3.55±0.15mm and a mass transfer rate ratio of 65.78% in 15 minutes.

[0032] Dynamic membrane anaerobic-aerobic circulation sewage treatment process,...

Embodiment 2

[0034] The quorum-sensing quenching bacterium Rhodococcus erythropolis was cultured in LB medium for 24 hours, centrifuged and resuspended in deionized water, and the bacterial suspension was prepared as the immobilized bacterial species. The bacterial suspension was mixed with sterile sodium alginate at a ratio of 1:15 to obtain a bacterial-sodium alginate suspension. Add 10% (w / v) CaCl dropwise to the bacteria-sodium alginate suspension 2 solution at 4 °C in CaCl 2 Soak in the solution for 24 hours, wash with water, store at 4°C, and store in deionized water. When the immobilized pellets are used, they are put into the sewage treatment system, and after 7 days of activation and domestication, the enrichment of quorum induction quenching bacteria can be completed. The average particle diameter of the obtained immobilized pellets was 2.65±0.15mm, and the mass transfer rate ratio in 15 minutes was 52.49%.

[0035] Dynamic membrane anaerobic-aerobic circulation sewage treatme...

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Abstract

The invention provides a method for regulating and controlling pollution of an anaerobic-aerobic dynamic membrane by utilizing immobilized quorum sensing. The method comprises the following steps: preparing a quorum sensing bacterial immobilized bead; putting into a sewage treatment system, and performing activation and domestication to complete enrichment of quorum sensing quenched bacteria. According to the method, raw water flows into an anaerobic pond and an aerobic pond of an anaerobic-aerobic circulation integral reaction system of a dynamic membrane through a regulating pond, a stirringdevice is arranged in the aerobic pond, and mud is discharged from the bottom of the aerobic pond; a perforated aeration pipe is arranged in the anaerobic pond, an external air compressor is used forblowing and aerating, the aeration rate is controlled with a rotor flow meter, the transmembrane pressure and membrane flux of a membrane component are monitored online, after a self-forming dynamicmembrane is formed, a dynamic membrane component made of an industrial filter cloth is put into an anaerobic pond and an aerobic pond, sewage in the aerobic pond is pumped into the anaerobic pond, andsewage in the anaerobic pond is pumped back to the aerobic pond to form continuous and circulating treatment, and then the sewage treatment process is completed; and degradation of aerobic and anaerobic microbes can be completed by circulating treatment of the dynamic membrane, and the effluent is drained after reaching standard.

Description

technical field [0001] The invention relates to a membrane-bioreactor, in particular to an anaerobic-aerobic dynamic membrane fouling control method utilizing immobilized quorum sensing. Background technique [0002] Membrane-bioreactor (MBR) is a new system that combines membrane separation technology and wastewater biological treatment technology. Attention, and gradually applied to the treatment of urban domestic sewage and industrial wastewater. However, the high cost of membranes and the problem of membrane fouling have become the main bottlenecks for the wider application of MBR. The emergence of dynamic membranes has solved these two problems well. The key of the dynamic membrane reactor is to replace the microfiltration membrane in the MBR with a large-pore mesh membrane, and use the sludge layer formed on the surface of the mesh membrane during operation to play a intercepting role. Due to the wide selection of porous bottom membrane and precoating agent and the l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F3/34C02F101/30
CPCC02F3/30C02F3/348C02F2101/30C02F2209/10C02F2301/04C02F2303/04C02F2303/16
Inventor 王海涛李薇
Owner XIAMEN UNIV
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