Preparation for preventing MBR (Membrane Bioreactor) membrane contamination and application of preparation

A membrane fouling and preparation technology, which is applied in the application, biocide, membrane technology and other directions to achieve quick results, reduce costs, and solve membrane fouling.

Active Publication Date: 2018-04-13
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem of membrane clogging in the MBR treatment process, the invention provides a preparation for preventing MBR membrane fouling and its preparation method and application

Method used

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  • Preparation for preventing MBR (Membrane Bioreactor) membrane contamination and application of preparation
  • Preparation for preventing MBR (Membrane Bioreactor) membrane contamination and application of preparation
  • Preparation for preventing MBR (Membrane Bioreactor) membrane contamination and application of preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Reagent preparation process:

[0054] Preparation A: signal molecule oxidant: ammonium persulfate 30kg, benzoic acid 30kg, sodium nitrate 40kg, sodium hypochlorite 15kg and stirred and mixed to obtain preparation A;

[0055] Preparation B: Composite flocculant: 15kg of polyacrylamide, 15kg of polydimethyldiallyl ammonium chloride, dried, stirred and mixed. Filter aid: activated carbon powder 50kg. Surfactant: 30 kg of sodium lauryl sulfate. Mix the above preparations evenly, filter with a sieve of 200 mesh or more, and remove larger particles to obtain powder preparation B.

[0056] (2) Sample loading conditions: the preparation prepared by the present invention enters the filter in the form of dosing. The dosing place is a reservoir (i.e. figure 1 Inject the sample at the opening of the reservoir 3) in the reservoir, and the sampling frequency is once every five days. Firstly, the dosage of formulation B was added at 17 mg / L, and after 24 hours, the dosage of f...

Embodiment 2

[0059] (1) Reagent preparation process:

[0060] Preparation A: signal molecule oxidant: ammonium persulfate 30kg, benzoic acid 30kg, sodium nitrate 40kg, sodium hypochlorite 15kg and stirred and mixed to obtain preparation A;

[0061] Preparation B: Composite flocculant: 20kg of polyacrylamine, 15kg of polydimethyldiallyl ammonium chloride, dried, stirred and mixed. Filter aid: activated carbon powder 50kg. Surfactant: 30 kg of sodium lauryl sulfate. Mix the above preparations evenly, filter with a sieve of 200 mesh or more, and remove larger particles to obtain powder preparation B.

[0062] (2) Sample loading conditions: the preparation prepared by the present invention enters the filter in the form of dosing. The dosing place is to inject samples at the opening of the reservoir, and the sampling frequency is once every five days. Firstly, the dosage of formulation B was added at 20 mg / L, and after 24 hours, the dosage of formulation A was added at 20 mg / L.

[0063] (3)...

Embodiment 3

[0065] (1) Reagent preparation process:

[0066] Preparation A: signal molecule oxidant: ammonium persulfate 30kg, benzoic acid 30kg, sodium nitrate 40kg, sodium hypochlorite 15kg and stirred and mixed to obtain preparation A;

[0067] Preparation B: Composite flocculant: 20kg of polyacrylamine, 15kg of polydimethyldiallyl ammonium chloride, dried, stirred and mixed. Filter aid: activated carbon powder 60kg. Surfactant: 30 kg of sodium lauryl sulfate. Mix the above preparations evenly, filter with a sieve of 200 mesh or more, and remove larger particles to obtain powder preparation B.

[0068] (2) Sample loading conditions: the preparation prepared by the present invention enters the filter in the form of dosing. The dosing place is to inject samples at the opening of the reservoir, and the sampling frequency is once every five days. Firstly, the dosage of formulation B was added at 22 mg / L, and after 24 hours, the dosage of formulation A was added at 23 mg / L.

[0069] (3)...

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Abstract

The invention discloses a preparation for preventing MBR (Membrane Bioreactor) membrane contamination and application of the preparation. The preparation is prepared from a component A and a componentB, wherein the component A is a signal molecular oxidant and the component B is a mixture of a filtration adjuvant, a flocculant and a surfactant; based on mass percent, the preparation is prepared from 50 to 60 percent of the signal moleculal oxidant, 20 to 30 percent of the filtration adjuvant, 10 to 20 percent of the flocculant and 10 to 20 percent of the surfactant. The waste water is fed into an impounding reservoir, the preparation for preventing the MBR membrane contamination is added into the waste water according to the sequence of first A and then B and then a mixture enters a membrane module. The preparation disclosed by the invention has the advantages that the MBR membrane contamination can be slowed down and the sewage treatment efficiency is improved. Meanwhile, the preparation for preventing the MBR membrane contamination has the characteristics of low cost and wide applicability, and provides an effective scheme for preventing and controlling the MBR membrane contamination.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a preparation for preventing MBR membrane pollution and its application. Background technique [0002] Membrane Bio-Reactor (MBR) is a wastewater treatment system that organically combines membrane separation technology and biological treatment technology. Compared with the traditional biochemical water treatment technology, MBR has the following main features: high treatment efficiency, good effluent quality; easy to realize automatic control, simple operation and management. After more than 20 years of development, membrane bioreactor has become one of the main technologies for advanced wastewater treatment. [0003] However, the problem of membrane fouling seriously restricts the popularization and application of MBR. Membrane fouling is mainly due to the particles and colloidal particles in the processed materials, which precipitate and accumulate on the surface of the membr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/08C02F3/00A01N59/00A01P1/00
CPCA01N59/00B01D65/08B01D2321/168C02F3/00C02F2303/14
Inventor 汪美贞孙锋严慧聪李悦
Owner ZHEJIANG GONGSHANG UNIVERSITY
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