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Prepn and application in industrial effluent treatment of biomembrane carrier

A biofilm carrier and a new type of technology, applied in biological water/sewage treatment, sustainable biological treatment, water/sludge/sewage treatment, etc., can solve the problems of slow film hanging speed and inability to actively provide microorganisms, and achieve film hanging. Fast speed, weakening the effect of processing effects, and improving the conversion rate

Inactive Publication Date: 2007-11-07
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of the fact that most of the currently widely used biofilm carrier materials are biologically inert materials, they cannot actively provide a good environment for microbial growth, and the speed of film formation is slow: therefore, the study of functional biofilm carriers that actively regulate the microenvironment required for microbial growth represents a representative of biofilms. The direction of carrier development is of great significance to improve the film-hanging speed of carriers and reactor efficiency, and to develop efficient and practical water treatment facilities

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The commercially available British courtaulds company that selects wet spinning is produced, and the polyacrylonitrile copolymer fiber (its monofilament number of holes is 3000 3K, fineness 1.1 denier (1.22dtex), copolymerization The material composition (according to the mass ratio) is: acrylonitrile 96, methylene succinic acid 1, methyl acrylate 3), in the air after 215 ℃, 240 ℃, 260 ℃, 280 ℃ four pre-oxidation furnace treatment, the residence time 7.5, 15, 15, 15 minn respectively, the total pre-oxidation time is 52.5 min. After continuous low and high temperature carbonization treatment, the temperature of low temperature carbonization is 300-700 ℃, the heating rate is 300 ℃ per minute, and the high temperature carbonization temperature is 1350 ℃ , keep the temperature for 2min, and make carbon fiber. The PAN-based carbon fiber prepared above was modified in a 5% ammonium bicarbonate electrolyte solution at 60° C. for 5 minutes with a charge of 100 c / g. The carbon ...

Embodiment 2

[0027] The preparation of PAN-based carbon fiber is the same as in Example 1, and it is modified in 15% ammonium bicarbonate electrolyte solution at 400 c / g of electricity at 70° C. for 3 minutes, and the gluing conditions are the same as in Example 1. The prepared modified PAN-based colloidal carbon fiber has an equilibrium water content of 5.1%, and a surface acidic functional group of 0.186meq / g. The experimental device and experimental conditions were the same as those in Example 1. The thickness of the fixed sulfate-reducing bacteria reached 500 μm in 24 hours, and the dry weight was 2.4 g / g carrier. The fixed methanogenic bacteria reached a thickness of 256 μm in 24 hours, and the dry weight was 1.3g / g carrier. The concentration of the effluent in the experiment was COD4 2- 58%, SO 4 2- Removal rate > 90%

Embodiment 3

[0029] The preparation of PAN-based carbon fiber is the same as in Example 1, and it is modified in 10% ammonium bicarbonate electrolyte solution at 300 c / g at 20° C. for 2 minutes, and the gluing conditions are the same as in Example 1. The equilibrium moisture content of the modified PAN-based colloidal carbon fiber is 7.8%, and the surface acidic functional group is 0.152meq / g. The experimental device and experimental conditions were the same as those in Example 1. The thickness of the fixed sulfate-reducing bacteria reached 465 μm in 24 g, and the dry weight was 2.1 g / g carrier. The fixed methanogenic bacteria reach a thickness of 248μm in 24g, and the dry weight is 1.2g / g carrier. The concentration of the experimental water is COD4 2- 57%, SO 4 2- Removal rate > 89%

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Abstract

The present invention relates to one kind of functional biological carbon fiber and its preparation process and application as biomembrane carrier. The biomembrane carrier is prepared with polyacrylonitrile carbon fiber, and through electrochemical surface treatment in 5-20 % concentration ammonium bicarbonate electrolyte to increase the surface acid oxygen containing functional groups and raise wettability, and gluing with water soluble epoxy resin in the amount 0.5-2 %. The biomembrane carrier can fix nitrobacteria, sulfate reducing bacteria and anaerobic methanogen. It may be used in treating high concentration acrylon waste water, and can eliminate sulfate, COD and ammonia nitrogen effectively. In addition, the biomembrane carrier is easy to regenerate and has no secondary pollution.

Description

Technical field: [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to the preparation and application of a novel high-efficiency biofilm carrier PAN-based colloidal carbon fiber for treating industrial wastewater with high sulfate, high COD and refractory organic matter. Background technique: [0002] Acrylic fiber wastewater is a typical industrial wastewater with high sulfate, high COD and refractory organic matter. Acrylic fiber wastewater mainly has the following three characteristics: first, it contains high molecular polymers that are difficult to biodegrade and natural sedimentation, and its biodegradability is poor; second, sulfuric acid and sulfurous acid are produced during the polymer preparation process, resulting in high concentrations of The sulfate and sulfite; the third is that the wastewater contains organic nitrogen and ammonia nitrogen, causing ammonia nitrogen pollution. Due to the above reasons, the b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/10C02F3/30
CPCY02W10/10
Inventor 刘杰杨琨马兆昆梁节英
Owner BEIJING UNIV OF CHEM TECH
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