Film carrier foamless oxygen supply biological film reactor and organic waste water treatment method

A biofilm reactor and biofilm technology, which is applied in the field of wastewater treatment, membrane carrier non-bubble oxygen supply biofilm reactor and organic wastewater treatment, can solve the problems that MABR has not formed a mature process mode, etc.

Inactive Publication Date: 2008-08-06
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, MABR has not yet formed a mature process model in terms of application

Method used

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  • Film carrier foamless oxygen supply biological film reactor and organic waste water treatment method

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Experimental program
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Effect test

Embodiment 1

[0017] Treatment of Wastewater from Nylon Synthetic Industry

[0018] The wastewater composition: COD Cr 2200mg / L, pH 7.8, suspended solids 160mg / L, water temperature 30°C.

[0019] The process of treating the waste water with the membrane carrier of the present invention is as follows: the curtain-type hollow fiber membrane module made of polyamide dense surface composite polyethersulfone porous hollow fiber membrane is placed in the waste water pool, and the curtain The hollow fiber membrane module has a width of 3 meters and a height of 1.5 meters. Each module has two layers of hollow fiber membranes permeable to oxygen. As shown in Figure 2, there are 5 curtain hollow fiber membrane modules arranged in parallel. The wastewater is introduced into the wastewater tank, and then the activated sludge capable of treating nylon is inoculated into the wastewater tank to cultivate the biofilm. The cultivation conditions are as follows: the air compressed by the air compressor is i...

Embodiment 2

[0021] Treatment of Domestic Wastewater

[0022] The composition of domestic wastewater: COD Cr 400-500mg / L, total nitrogen about 80mg / L, pH about 7.2, suspended solids 120mg / L, water temperature 20°C;

[0023] The curtain-type hollow fiber membrane module made of poly-4-methyl-1-pentene dense cortex asymmetric porous hollow fiber membrane shown in Figure 3 is placed in the waste water tank, and the width of the curtain-type hollow fiber membrane module is 2 meters , a height of 1 meter, each module has 3 layers of oxygen-permeable hollow fiber membranes, to treat the above wastewater, the process is as follows:

[0024] Biofilm cultivation process: introduce the domestic wastewater into the wastewater tank, inoculate the activated sludge capable of treating the domestic wastewater directly into the wastewater tank, adjust the air inlet pressure to 0.2MPa, and the wastewater flows at a flow rate of 0.1m / h After 25 days of cultivation, a 300 micron thick biofilm was attached ...

Embodiment 3

[0027] Treatment of wastewater containing toluene

[0028] The wastewater composition: COD Cr 4000mg / L, pH 8.1, suspended solids 230mg / L, water temperature 18°C

[0029] The curtain-type hollow fiber membrane module made of polyamide dense surface composite polyethersulfone porous hollow fiber membrane shown in Figure 2 is placed in the wastewater reaction tank. The curtain-type hollow fiber membrane module has a width of 3 meters and a length of 1.5 meters. There are 5 layers of oxygen-permeable hollow fiber membranes on the module to treat the above wastewater, the process is as follows:

[0030] Biofilm cultivation process: introduce wastewater into the wastewater tank, inoculate the special microorganisms capable of treating the toluene-containing wastewater into the wastewater reaction tank, adjust the air inlet pressure to 0.2MPa, and the wastewater flows in the wastewater tank at a speed of 0.2m / h , after 13 days of cultivation, a 100-micron-thick biofilm was attached...

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Abstract

The invention relates to a biomembrane reactor with non-foaming oxygen supply of a membrane carrier and a method for treating organic wastewater, which belongs to a technique for treating wastewater. The biomembrane reactor with non-foaming oxygen supply of the membrane carrier comprises a hollow membrane component of a curtain type. The process of treating wastewater by applying the biomembrane reactor with non-foaming oxygen supply of the membrane carrier comprises the following steps: the hollow membrane component of a curtain type is arranged in a wastewater pond; air is lead in through an inlet pipe; oxygen in the air permeates a hollow fiber membrane of oxygen permeation and enters the biomembrane attached on the hollowing fiber membrane of oxygen permeation; organic wastewater after settled flows through the surface of the biomembrane attached on the hollowing fiber membrane with a certain flow rate; microorganisms on the hollow fiber membrane decompose organic matters, so the content of organic matters in the water is gradually decreased; when the index of the organic matters reaches the requirement of wastewater discharge, the wastewater is discharged through a water outlet. The biomembrane reactor with non-foaming oxygen supply of the membrane carrier has the advantages of high utilization of oxygen, small amount of required aeration, energy conservation, and easy control of transferring efficiency.

Description

Technical field: [0001] The invention relates to a membrane carrier bubble-free oxygen supply biofilm reactor and a method for treating organic waste water, belonging to waste water treatment technology. Background technique: [0002] The combination of membrane technology and biological water treatment technology has produced three types of membrane bioreactors, namely, the membrane bioreactor (MBR) for retaining microorganisms and suspended solids, the bubble-free membrane aerated bioreactor (MABR) and the extraction membrane bioreactor ( EMBR). In terms of organic wastewater treatment, MBR has been commercialized, but due to the use of bubble aeration, the oxygen utilization rate is low, and the energy consumption of MBR is high, which makes its operation cost high and its application range is limited. MABR sewage treatment technology is a new process developed to address the shortcomings of the current MBR. The process theoretically has high oxygen transfer efficiency, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F3/10
CPCY02W10/10
Inventor 李保安闫庆元魏昕
Owner TIANJIN UNIV
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