A New Method to Control Membrane Fouling in Membrane-Bioreactor

A bioreactor, biofilm technology, applied in chemical instruments and methods, biological water/sewage treatment, sustainable biological treatment, etc. Energy consumption, mitigation of membrane fouling, effect of optimizing membrane fouling situation

Inactive Publication Date: 2011-12-14
PACIFIC WATER TREATMENT ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During the long-term operation of the membrane-bioreactor, it will inevitably lead to m

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] [Example 1]

[0018] Two sets of membrane-bioreactors treat the same urban domestic sewage, with a designed hydraulic retention time of 8h and a sludge age of 90d. The membrane module uses PVDF flat membranes with a membrane pore size of 0.20μm and a constant membrane flux of 25L / (h·m 2 ); Among them, the experimental group was fed with fillers, the fillers were honeycomb plastic fillers, and the filler dosage was 5% of the reactor volume, and the other group served as a control group. The operation results show that the membrane cleaning cycle of the experimental group is 120 days, and the energy consumption is 0.51kwh / m 3 , The membrane cleaning cycle of the blank group is 50d, and the energy consumption is 0.55kwh / m 3 .

Example Embodiment

[0019] [Example 2]

[0020] Two sets of membrane-bioreactors treat the same industrial wastewater. The designed hydraulic retention time is 10h and the sludge age is 120d. The membrane module uses a polyvinyl chloride (PVC) flat membrane with a membrane pore size of 0.25μm and a constant membrane flux of 15L / (h·m 2 ); Among them, the experimental group was filled with fillers, which were corrugated plate hard polyvinyl chloride fillers, and the filler dosage was 10% of the reactor volume, and the other group served as a control group. The operation results show that the membrane cleaning cycle of the experimental group is 87 days and the energy consumption is 0.53kwh / m 3 , The membrane cleaning cycle of the blank group is 35d, and the energy consumption is 0.59kwh / m 3 .

Example Embodiment

[0021] [Example 3]

[0022] Two sets of membrane-bioreactors treat the same fecal sewage. The designed hydraulic retention time is 8h and the sludge age is 90d. The membrane module adopts a polyvinylidene fluoride (PVDF) flat membrane with a membrane pore size of 0.20μm and a constant membrane flux of 20L / (h·m 2 ); Among them, the experimental group was fed with fillers, the fillers were soft fibrous fillers, the filler dosage was 5% of the reactor volume, and the other group served as a control group. The operation results show that the membrane cleaning cycle of the experimental group is 100 days, and the energy consumption is 0.51kwh / m 3 , The membrane cleaning cycle of the blank group is 45d, and the energy consumption is 0.56kwh / m 3 .

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PUM

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Abstract

A new method for controlling membrane fouling in a membrane-bioreactor relates to a technology for controlling fouling of a membrane component in a membrane-bioreactor, and is suitable for treating water and waste water by a membrane-bioreactor. The invention forms a dual system of biofilm method and membrane-bioreactor by adding a certain amount of filler in the reactor as the carrier of the biofilm, thereby reducing the pollution rate of the surface of the membrane module; at the same time, the optimized aeration method can By controlling the metabolism of microorganisms to further slow down membrane fouling and reduce energy consumption. The method of the present invention does not require structural modification of the original membrane-bioreactor, only needs to add a certain amount of filler, and the method of the present invention can further reduce energy consumption, and is suitable for membrane-bioreactions in the form of various membrane modules It has strong practicability, wide application range, low operating cost, and convenient operation and management. The invention integrates the biofilm method and the membrane-bioreactor efficiently, and has an optimized aeration mode, can well control membrane pollution, reduce energy consumption, and realize long-term stable operation of the membrane-bioreactor.

Description

technical field [0001] The invention belongs to the technical field of water and waste water treatment, and in particular relates to a new method for controlling membrane component pollution. Background technique [0002] Membrane-bioreactor (MBR) process is a new type of water and wastewater biological treatment technology that combines modern membrane separation technology and biotechnology. Retention, replacing the traditional secondary sedimentation tank, greatly increases the concentration of activated sludge (biomass) in the biochemical reaction tank; realizes separate control of hydraulic retention time (HRT) and sludge retention time (SRT), and refractory sludge Macromolecular organic substances are trapped in the reaction pool to continuously react and degrade. The treatment efficiency of the bioreactor is greatly improved by the membrane separation technology. Compared with the traditional biological treatment process, it has high biochemical efficiency, strong im...

Claims

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Application Information

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IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 何磊梅晓洁于鸿光韩小蒙秦爱东冯金荣邓伯林张效刚刘青友达云祥
Owner PACIFIC WATER TREATMENT ENG
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