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Double-layer polypropylene non-woven fabric membrane assembly and membrane pollution control method thereof

A polypropylene non-woven fabric and control method technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of increasing the content of suspended solids in effluent and improving the difficulty of water plant operation and management.

Pending Publication Date: 2021-12-07
LIAONING INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the control of the formation and shedding of the dynamic film also increases the difficulty of the operation and management of the water plant, and when the dynamic film falls off, the content of suspended solids in the effluent may increase in a short period of time

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Double-layer polypropylene non-woven fabric membrane assembly and membrane pollution control method thereof
  • Double-layer polypropylene non-woven fabric membrane assembly and membrane pollution control method thereof
  • Double-layer polypropylene non-woven fabric membrane assembly and membrane pollution control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Membrane effluent suspended solids (SS) non-woven polypropylene membrane bilayer embodiment different flux of Example 1 and the content of the transmembrane pressure

[0024] A two-layer nonwoven polypropylene membrane and membrane fouling control method using a first layer of polypropylene nonwoven fabric (1) a polypropylene nonwoven fabric and the second layer (2) made of a polypropylene non-bilayer as the nonwoven fabric filter membrane, in particular as membrane module assembly method: two double coated polypropylene nonwoven fabric (3) on both sides of the porous support frame, respectively, from two fixation panel frame (4) are respectively overlaid on the two double-layer polypropylene nonwoven fabric, a porous supporting frame (3) and two from the fixation panel frame (4) is provided with preformed holes (5), via a screw and a nut made of stainless steel prepared hole (5) the porous supporting frame (3), two-layer polypropylene nonwoven fabric (1,2) and two from the...

Embodiment 2

[0028] Example 2 aerobic membrane bilayer nonwoven polypropylene based membrane bioreactor wastewater treatment simulation

[0029] A two-layer nonwoven polypropylene membrane and membrane fouling control method using a first layer of polypropylene nonwoven fabric (1) a polypropylene nonwoven fabric and the second layer (2) made of a polypropylene non-bilayer as the nonwoven fabric filter membrane, in particular as membrane module assembly method: two double coated polypropylene nonwoven fabric (3) on both sides of the porous support frame, respectively, from two fixation panel frame (4) are respectively overlaid on the two double-layer polypropylene nonwoven fabric, a porous supporting frame (3) and two from the fixation panel frame (4) is provided with preformed holes (5), via a screw and a nut made of stainless steel prepared hole (5) the porous supporting frame (3), two-layer polypropylene nonwoven fabric (1,2) and two from the fixation panel frame (4) are pressed and fixed to...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention provides a double-layer polypropylene non-woven fabric membrane assembly and a membrane pollution control method thereof. Polypropylene non-woven fabric is used as a filter medium to form a plate frame type membrane assembly based on the double-layer polypropylene non-woven fabric, the double-layer polypropylene non-woven fabric membrane assembly is applied to a membrane bioreactor, the quality of membrane effluent is stable, in the initial stage of operation, the content of suspended solids in effluent is lower than 10mg / L, and when the transmembrane pressure is increased to 20-25Kpa due to membrane pollution, the membrane flux can be recovered by a physical cleaning method, so that the membrane pollution is effectively controlled. The system is low in operation pressure, simple in membrane pollution control method and small in environmental residue, and has the characteristics of energy conservation and environmental protection.

Description

Technical field [0001] The present invention belongs to the field of environmental engineering water pollution control technology, particularly it relates to reducing film membrane bioreactor process cost and operation control method of membrane fouling. Background technique [0002] Membrane bioreactor is an efficient water treatment process, has a small footprint, water quality is good, the advantages of higher sludge concentration, received widespread attention in the field of urban sewage treatment and the like. Currently practical applications most membrane bioreactor using PVDF hollow fiber microfiltration membrane, the membrane is relatively high price, more importantly, the presence of membrane pollution problems, the need for regular film physical and chemical cleaning this increases the operating costs and the difficulty of managing the sewage plant, cleaning chemicals can also cause secondary environmental pollution. in addition, frequent chemical cleaning will reduce ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D63/08B01D65/08B01D65/10C02F3/00
CPCB01D63/082B01D65/10B01D65/08C02F3/00
Inventor 李晓惠许艳广
Owner LIAONING INST OF SCI & TECH
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