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Photocatalytic internal-circulation anaerobic fluidized membrane bioreactor and working method thereof

A membrane bioreactor, anaerobic fluidization technology, applied in the direction of chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve problems such as easy clogging, to overcome easy clogging, realize treatment, simplify Effect of Reactor Structure

Inactive Publication Date: 2013-02-20
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention combines the improved internal circulation anaerobic fluidized membrane bioreactor with titanium dioxide photocatalysis technology, which not only overcomes the problem of easy blockage of the existing internal circulation anaerobic membrane bioreactor, but also simplifies the reactor structure, and at the same time The treatment of organic pollutants that are easy to biochemically degrade and difficult to biochemically degrade is realized. The introduction of titanium dioxide photocatalysis also reduces the cost of catalytic oxidation and reduces the toxicity of the reaction

Method used

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  • Photocatalytic internal-circulation anaerobic fluidized membrane bioreactor and working method thereof

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preparation example Construction

[0058] The preparation method of the titanium dioxide light particles comprises the following steps:

[0059] (1) Using a magnetic constant temperature stirrer, add analytically pure butyl titanate and analytically pure glacial acetic acid to absolute ethanol in sequence at 25°C, and stir for 15-20 minutes to obtain a uniform and transparent light yellow solution; the titanic acid The parts by volume of butyl ester, glacial acetic acid and dehydrated alcohol are respectively:

[0060] Butyl titanate: 5 parts;

[0061] Glacial acetic acid: 1 part;

[0062] Anhydrous ethanol: 15 parts;

[0063] (2) Continue to stir, add the nitric acid solution that accounts for 1-2% by volume of the light yellow solution obtained in the step (1), the concentration of the nitric acid solution is 65-68wt%; add the light yellow solution obtained in the step (1) An ethanol solution with a volume percentage of 25-27% of the yellow solution, the concentration of the ethanol solution is 90-95wt%, a...

Embodiment 1

[0070] A photocatalytic, internal circulation anaerobic fluidized membrane bioreactor, including a reaction cylinder 1, a stripping cylinder 3, a three-phase separator 2 and a membrane module 5, and a water inlet pipe 4 is arranged at the bottom of the reaction cylinder 1 With the inlet pipe, light particles 10 loaded with titanium dioxide are placed in the reaction cylinder 1; a biogas aeration disc 12, a stripping cylinder 3 and a three-phase separator are arranged axially in the interior of the reaction cylinder 1 from bottom to top. Said airlift tube 3 is provided with an ultraviolet light source 11; a three-phase separator 2 is covered above said airlift tube 3, and said three-phase separator 2 includes a draft guide tube 2- 1 and an umbrella-shaped flow guide cover 2-2, an inwardly folded flow guide edge 2-3 is provided on the outer edge of the umbrella-shaped flow guide cover, and the upper end of the flow guide tube 2-1 passes through the reaction tube 1 The top cover ...

Embodiment 2

[0073] A kind of utilizing as embodiment 1 described reactor to process certain azo reactive blue printing and dyeing wastewater, COD in the wastewater Cr The content is 600-800mg / L, BOD / COD<0.18; the temperature in the reactor is maintained at 35±1°C; the specific method includes the following steps:

[0074](1) After the wastewater enters the reaction cylinder 1 through the water inlet pipe at the bottom of the reaction cylinder 1, the circulating methane gas enters the stripping cylinder through the inlet pipe at the bottom of the reaction cylinder. Titanium dioxide light particles are mixed into mixed wastewater;

[0075] (2) The mixed wastewater in the step (1) enters the stripper 3, and under the irradiation of the ultraviolet light source 11 and the catalytic action of titanium dioxide, the refractory organic matter in the mixed wastewater is degraded into biodegradable compounds;

[0076] (3) The mixed wastewater flows upwards along the airlift cylinder 3 to the umbre...

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Abstract

The invention relates to a photocatalytic internal-circulation anaerobic fluidized membrane bioreactor which comprises a reaction cylinder, a gas stripping cylinder, a three-phase separator and a membrane element, wherein the bottom of the reaction cylinder is provided with a water inlet pipe and a gas inlet pipe; light-weight granules carrying titanium dioxide are arranged in the reaction cylinder; the inside of the reaction cylinder is axially provided with a marsh gas aeration tray, the gas stripping and the three-phase separator from bottom to top; and an ultraviolet light source is arranged in the gas stripping cylinder. The invention also provides a method for treating wastewater by using the reactor. The invention combines multiple sewage treatment technologies, implements high-efficiency treatment of nondegradable wastewater, achieves the goal of wastewater recycling, and is a high-efficiency practical sewage / wastewater treatment and recycling technique.

Description

technical field [0001] The invention relates to a photocatalytic, internal circulation anaerobic fluidized membrane bioreactor and a working method thereof, belonging to the technical field of wastewater treatment and reuse. Background technique [0002] The shortage of water resources is one of the most serious resource problems faced by human beings in the 21st century. The reuse of reclaimed water is one of the important means of water resource regeneration. Compared with seawater desalination and water transfer across river basins, reclaimed water has the lowest cost and sewage regeneration Utilization helps to improve the ecological environment and realize a virtuous circle of water ecology. my country's water resources are seriously short and unevenly distributed, and the water pollution problem is serious. Therefore, it is the only way to vigorously promote the recycling technology of sewage and wastewater. [0003] At present, biological methods are mostly used in s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14B01J21/18
Inventor 王燕马德方闫晗韩绮高宝玉岳钦艳李倩
Owner SHANDONG UNIV
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