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Composite filler of membrane bioreactor, and preparation method thereof

A technology of membrane bioreactor and composite packing, which is applied in the field of composite packing of membrane bioreactor and its preparation, can solve the problem of difficult ammonia nitrogen reaching the standard, and achieve the effects of large catalytic specific surface area, improved ion exchange function, and large specific surface area

Inactive Publication Date: 2019-12-13
AWS ENVIRONMENT TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in recent years, the C / N in domestic sewage or black and odorous water is low, and it is difficult for conventional membrane bioreactors to achieve ammonia nitrogen standards

Method used

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  • Composite filler of membrane bioreactor, and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A composite filler for a membrane bioreactor is prepared from the following components in parts by weight: 65 parts of acrylic acid monomer, 35 parts of zeolite, 3.9 parts of polyamide and 0.65 part of toluene. Among them, the particle size of zeolite is 150 mesh, and the density is 6.5g / cm 3 , The ion exchange capacity is 680mmol / g.

[0033] The preparation method of the composite filler of this membrane bioreactor comprises the following steps:

[0034] 1) Synthesis of ion exchange resin: 65 parts of acrylic acid monomer, 35 parts of zeolite, 3.9 parts of polyamide and 0.65 part of toluene were mixed and cured at 50°C for 8 hours;

[0035] 2) crushing: using a pulverizer to crush the material obtained in step 1) to a particle size below 5mm;

[0036] 3) Sieving: Sieve out particles with a particle size of 2-4mm, rinse with water and dry at 110°C to constant weight;

[0037] 4) Acid-base treatment: Soak the sieved particles in 2 times the volume of 1mol / L NaOH solut...

Embodiment 2

[0040] A composite filler for a membrane bioreactor is prepared from the following components in parts by weight: 60 parts of acrylic acid monomer, 40 parts of zeolite, 2.4 parts of polyamide and 1.8 parts of toluene. Among them, the particle size of zeolite is 250 mesh, and the density is 6.2g / cm 3 , The ion exchange capacity is 800mmol / g.

[0041] The preparation method of the composite filler of this membrane bioreactor comprises the following steps:

[0042]1) Synthesis of ion exchange resin: 60 parts of acrylic acid monomer, 40 parts of zeolite, 2.4 parts of polyamide and 1.8 parts of toluene were mixed and cured at 60°C for 15 hours;

[0043] 2) crushing: using a pulverizer to crush the material obtained in step 1) to a particle size below 5mm;

[0044] 3) Sieving: sieve out particles with a particle size of 2-4mm, rinse with water and dry at 115°C to constant weight;

[0045] 4) Acid-base treatment: Soak the sieved particles in 2 times the volume of 2mol / L NaOH solut...

Embodiment 3

[0048] A composite filler for a membrane bioreactor is prepared from the following components in parts by weight: 55 parts of acrylic acid monomer, 45 parts of zeolite, 2.75 parts of polyamide and 1.1 part of toluene. Among them, the zeolite is a modified zeolite with a diameter of 0.5-1mm and a density of 2.5g / cm 3 , ion exchange capacity 280mmol / g, porosity 65%, specific surface area 380m 2 / g.

[0049] The preparation method of the composite filler of this membrane bioreactor comprises the following steps:

[0050] 1) Synthesis of ion exchange resin: 55 parts of acrylic acid monomer, 45 parts of zeolite, 2.75 parts of polyamide and 1.1 part of toluene were mixed and cured at 55°C for 12 hours;

[0051] 2) crushing: using a pulverizer to crush the material obtained in step 1) to a particle size below 5mm;

[0052] 3) Sieving: Sieve out particles with a particle size of 2-4mm, rinse with water and dry at 120°C to constant weight;

[0053] 4) Acid-base treatment: soak the ...

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Abstract

The invention discloses a composite filler of a membrane bioreactor, wherein the composite filler is prepared from the following components by weight: 50-70 parts of an acrylic monomer, 30-50 parts ofzeolite, 1.5-6 parts of polyamide, and 0.5-2.5 parts of toluene. The invention further provides a preparation method of the composite filler. According to the present invention, the composite fillerhas characteristics of high in porosity and large specific surface area; and with the application of the composite filler as the biological filler in the contact of the oxidation pond, the ammonia nitrogen removal rate can achieve near 90% within a hydraulic retention time of 4-6 h only by requiring 30-40% of the volume of the filler, and the load can reach 1.6 kg NH<+4>-N / (m<3>.d).

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a composite filler for a membrane bioreactor and a preparation method thereof. Background technique [0002] With the development of our country's economy and society, environmental pollution has brought us severe challenges. Under the guidance and promotion of national energy conservation and emission reduction policies, in order to meet the needs of comprehensive sewage treatment, sewage reuse or urban landscape water in some key areas, at present, no matter whether it is a new urban sewage treatment plant or an urban sewage treatment plant that is about to be constructed or has been built The urban sewage treatment plants in the country are all required to add advanced treatment on the basis of reaching the first-level B standard of the design, so that the effluent of the advanced treatment facilities can reach the "Pollutant Discharge Standards for Urban Sewage Treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F3/10C02F3/34C02F101/16
CPCC02F3/105C02F3/1268C02F3/34C02F2101/16Y02W10/10
Inventor 倪康祥
Owner AWS ENVIRONMENT TECH LTD