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Improving Phosphorus Precipitation and Membrane Flux in Membrane Bioreactors

A technology of membrane bioreactor and composition, applied in the direction of sustainable biological treatment, biological water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of increasing treatment costs, energy consumption, membrane downtime, etc.

Active Publication Date: 2022-05-10
KEMIRA OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such steps offer disadvantages such as increased processing costs, energy consumption, and membrane downtime

Method used

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  • Improving Phosphorus Precipitation and Membrane Flux in Membrane Bioreactors
  • Improving Phosphorus Precipitation and Membrane Flux in Membrane Bioreactors

Examples

Experimental program
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example

[0050] The composition according to the invention was tested for about three weeks in a pilot plant of a local municipal wastewater treatment plant. The pilot plant has two parallel lines with an inflow of 1.5m to each line 3 / h. The test program is in figure 1 presented in .

[0051] The composition of the invention is administered before or directly into the denitrification tank. The composition according to the invention was added to line B several times a day at a dosage of about 80 ppm, while in another line the reference product containing ferrous sulfate was continuously added at dosage rates of 50 mg / l and 150 mg / l, respectively.

[0052] result

[0053] The results show that even intermittent addition of new product improves the water treatment effect and membrane performance.

[0054] Phosphorus removal was 84% ​​compared to 83% for the reference stream. The total nitrogen removal was 42% for the composition of the invention at 80 ppm and 33% for the referenc...

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Abstract

The present invention relates to a composition for treating wastewater in a membrane bioreactor, the composition comprising a mixture of inorganic coagulants and one or more organic water-soluble polymers, wherein the inorganic coagulants are selected from the group consisting of iron and and / or compounds of aluminum and these organic water-soluble polymers are selected from the group consisting of anionic, cationic, nonionic polymers, polysaccharide and polyphenolic compounds and any combination thereof. The invention further relates to a method for treating wastewater in a membrane bioreactor, and its use.

Description

technical field [0001] The present invention relates to wastewater treatment using membrane bioreactors. Background technique [0002] Wastewater can be treated and purified in many different ways. One way to purify water is to use membrane bioreactors. The process using a membrane bioreactor (MBR) combines membrane filtration technology with biological treatment of wastewater. A membrane is a barrier that allows only certain components (permeate) to pass through it. The selectivity of a membrane can be controlled by its pore size. Suspended solids and biologically treated microorganisms are separated from the treated water by using suitable membranes, such as ultrafiltration or microfiltration membranes. These membranes can be submerged in, ie integrated with, the bioreactor tank, or they can be arranged in a separate process unit outside the bioreactor, whereby an intermediate pumping step may be required. [0003] The MBR process can have the problem of membrane foul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12C02F1/44C02F1/52C02F1/56B01D65/08
CPCB01D65/08C02F1/444C02F1/5263C02F1/56C02F3/1268C02F3/1273C02F2101/105B01D2321/168C02F1/5245Y02W10/10
Inventor M·赫萨姆波尔法兹卢拉·阿扎尔诺什S·哈特图恩
Owner KEMIRA OY
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