A kind of electrophilic biological carrier and its preparation method

A technology of biological carrier and electric function, applied in the field of biological treatment of pollutants, can solve the problems of poor reactor operation and treatment effect, slow film forming speed of biological carrier, low ammonia nitrogen removal efficiency, etc., and achieves enhanced nitrification-denitrification. effect, shorten the film hanging cycle, and facilitate the processing

Active Publication Date: 2015-10-28
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, most of the biocarriers produced in China are directly processed into polymer materials. Therefore, the biocarriers produced have slow film formation speed, poor biocompatibility, easy biofilm detachment, and low ammonia nitrogen removal efficiency. Reactor operation and treatment not effectively

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 25 kg of polyethylene, 1 kg of polyaniline with a fineness of more than 100 mesh, 1 kg of neutral alumina and diatomaceous earth, 2 kg of calcium carbonate and 1 kg of ferric oxide, and add the above raw materials to the mixer and mix evenly ; put it in the granulator and process it into granules at a temperature of 150°C; put the granules into the screw extruder, and the temperature of each section is 130°C, 140°C, 150°C, 130°C (head), and extrude Make a cylindrical tube, and finally make the biological carrier of the present invention through cooling, cutting and shaping, and its density is 0.93g / cm 3 . The biological carrier prepared in this example was tested for solid surface Zeta potential. The test results showed that when the electrolyte was neutral, the surface Zeta potential of the biological carrier was +22mV, indicating that the surface of the biological carrier was positively charged.

Embodiment 2

[0027] Take 10 kg of polypropylene, 0.5 kg of cationic polyacrylamide with a fineness above 100 mesh, 0.2 kg of polyvinyl alcohol, 0.2 kg of neutral alumina, 0.2 kg of talcum powder and 0.1 kg of ferric oxide, add the above raw materials and mix The machine is mixed evenly; placed in the granulator and processed into granules at a temperature of 150°C; the granules are added to the screw extruder, and the temperature of each section is 130°C, 140°C, 150°C, 130°C (machine head) , extruded into a cylindrical tube, and finally cooled, cut and shaped to make the biological carrier of the present invention, its density is 0.95g / cm 3 . The prepared electrophilic biological carrier and polypropylene biological carrier of the same shape and quantity were added to the urban sewage aerobic biological treatment system, and the rapid sludge discharge method was used to conduct a film-hanging comparison experiment. The experimental results show that the time required for the electrophilic...

Embodiment 3

[0029] Take 23 kg of polyethylene, 0.7 kg each of cationic polyacrylamide and polyaniline with a fineness above 100 mesh, 1.3 kg each of activated carbon and diatomaceous earth, 0.4 kg of talcum powder and 0.1 kg of ferric oxide, add the above raw materials and mix The machine is mixed evenly; placed in the granulator and processed into granules at a temperature of 150°C; the granules are added to the screw extruder, and the temperature of each section is 130°C, 140°C, 150°C, 130°C (machine head) , extruded into a cylindrical tube, and finally cooled, cut and shaped to make the biological carrier of the present invention, its density is 0.91g / cm 3 . The biological carrier prepared in this example was subjected to a biodegradation experiment simulating urban sewage, and the experimental results showed that the removal rates of COD and ammonia nitrogen all reached more than 95%, indicating that the electrophilic biological carrier prepared by the present invention has a good sew...

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Abstract

The invention discloses an electrophilic suspended bio-carrier and a preparation method thereof. The electrophilic suspended bio-carrier comprises the following raw materials in parts by mass: 100-250 parts of high-molecular interstitial substance, 2-15 parts of electrophilic functional material, 2-20 parts of auxiliary material 1; 2-20 parts of auxiliary material 2 and 1-10 parts of auxiliary material 3. The electrophilic suspended bio-carrier is formed by the raw materials through mixing, granulation, screw extrusion, cooling and cutting. The electrophilic suspended bio-carrier provided by the invention is convenient to prepare, and the density of the electrophilic suspended bio-carrier is controllable within 0.91-0.97 g / cm<3>; according to the property that microbes have negative electricity in water, the electrophilic suspended bio-carrier is mixed with the positively charged functional material to endow the surface of the electrophilic suspended bio-carrier with positive charge to enhance the compatibility between the microbes and the electrophilic suspended bio-carrier. The electrophilic suspended bio-carrier is favorable for apposition growth of microbes and easy for biofilm culturing, has a short period, large biomass, high ammonia nitrogen removal efficiency and good effluent quality; the sludge settling property is good, and equipment operation is free from a sludge blockage phenomenon; the service life of the electrophilic suspended bio-carrier is long and manual replacement and maintenance are not needed.

Description

technical field [0001] The invention relates to an electrophilic biological carrier and a preparation method thereof, which can be used for the biological treatment of environmental pollutants, especially for the biological treatment of sewage. The invention belongs to the field of biological treatment of pollutants. Background technique [0002] The place where microorganisms live - the research and development of biological carriers is the key to the development of fixed bed or moving bed biofilm reaction process. However, at present, most of the biocarriers produced in China are directly processed into polymer materials. Therefore, the biocarriers produced have slow film formation speed, poor biocompatibility, easy biofilm detachment, and low ammonia nitrogen removal efficiency. Reactor operation and treatment not effectively. Contents of the invention [0003] The purpose of the present invention is to provide a surface electrophilic biological carrier capable of imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34
Inventor 全燮毛彦俊张耀斌陈硕赵慧敏于洪涛
Owner DALIAN UNIV OF TECH
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