Porous light-weight carbon-based biological carrier and preparation method thereof

A biological carrier and lightweight technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of large reactor fluidization power consumption, microbial film formation and microbial biomass Poor, complex processing technology and other issues, to achieve the effect of improving adsorption capacity and film-hanging amount, easy quantity, and low preparation cost

Active Publication Date: 2013-06-19
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing common biological carriers have many disadvantages, such as high material cost, complex processing technology, and some environmental problems such as secondary pollution. For example, the inorganic ceramic materials used generally have high density, low porosity, small specific surface area and reaction Fluidization power consumption in the device is large; most polymer organic carriers come from petrochemical derivatives, such as polypropylene, polyethylene, etc., which have poor hydrophilicity, poor microbial film formation and microbial biomass, and some The material is photolyzed in the environment, and even has certain toxicity to environmental organisms

Method used

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  • Porous light-weight carbon-based biological carrier and preparation method thereof

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Effect test

Embodiment 1

[0023] A porous light carbon-based biological carrier, which is prepared according to the following steps:

[0024] 1) First, dissolve 15g of polyvinyl alcohol with a degree of polymerization of 1750 in 85ml of boiling water at 100°C and stir for 8 hours under reflux to obtain a 15% by weight polyvinyl alcohol solution;

[0025] 2) Next, take coke powder with a particle size of 300 mesh and put it in a nitric acid solution with a concentration of 50% by weight at room temperature for oxidation modification, treat it for 2 hours, take it out and wash it to neutral, and then wash it with tap water for 3 times;

[0026] 3) Then dry the coke powder in an oven at a constant temperature of 100°C for 2 hours;

[0027] 4), then add 5g of coke powder, 5ml of sodium lauryl sulfate aqueous solution with a concentration of 0.5% by weight and 2ml of an aqueous solution of glutaraldehyde with a concentration of 0.5% by weight to the 100ml of polyvinyl alcohol solution in step 1) Stir rapid...

Embodiment 2

[0033] A porous light carbon-based biological carrier, which is prepared according to the following steps:

[0034] 1) First, dissolve 10g of polyvinyl alcohol with a degree of polymerization of 1850 in 90ml of boiling water at 100°C and stir for 8 hours under reflux to obtain a 10% by weight polyvinyl alcohol solution;

[0035] 2) Next, take coke powder with a particle size of 180 mesh and put it in a nitric acid solution with a concentration of 30% by weight at room temperature for oxidative modification, treat it for 3 hours, take it out and wash it to neutral, and then wash it with tap water 4 times;

[0036] 3) Then dry the coke powder in an oven at a constant temperature of 90°C for 1.5h;

[0037] 4) Add 10g of coke powder, 5ml of sodium lauryl sulfate aqueous solution with a concentration of 1.0% by weight and 2ml of an aqueous solution of glutaraldehyde with a concentration of 1.0% by weight to the 100ml of polyvinyl alcohol solution in step 1) Stir rapidly for 3 hour...

Embodiment 3

[0043] A porous light carbon-based biological carrier, which is prepared according to the following steps:

[0044] 1) First, dissolve 5g of polyvinyl alcohol with a degree of polymerization of 1900 in 95ml of boiling water at 100°C and stir for 8 hours under reflux to obtain a 5% by weight polyvinyl alcohol solution;

[0045] 2) Next, take coke powder with a particle size of 200 mesh and put it in a nitric acid solution with a concentration of 10% by weight at room temperature for oxidation modification, treat it for 5 hours, take it out and wash it to neutral, and then wash it with tap water for 3 times;

[0046] 3), and then dry the coke powder in an oven at a constant temperature of 90°C for 2 hours;

[0047] 4), then add 5g of coke powder, 5ml of sodium lauryl sulfate aqueous solution with a concentration of 2.0% by weight and 2ml of an aqueous solution of glutaraldehyde with a concentration of 1.5% by weight to the 100ml of polyvinyl alcohol solution in step 1) Stir rap...

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Abstract

The invention provides a porous light-weight carbon-based biological carrier. The porous light-weight carbon-based biological carrier is a foamed coke powder / polyvinyl alcohol gel mixture which is prepared by performing crosslinking reaction on coke powder, a polyvinyl alcohol solution, a foaming agent solution and a crosslinking agent solution used as raw materials at normal temperature, wherein the weight percent concentration of the polyvinyl alcohol solution is 5-15%; the weight percent concentration of the foaming agent solution is 0.2-2%; the weight percent concentration of the crosslinking agent solution is 0.5-1.5%; the weight ratio of the polyvinyl alcohol water solution to the coke powder is (10-25):1; the weight ratio of the polyvinyl alcohol water solution to the foaming agent solution is (15-45):1; and the weight ratio of the polyvinyl alcohol water solution to the crosslinking agent solution is (20-50):1. The biological carrier is high in film-forming speed and microbial capacity, provides a proper nutrient source for microorganisms and has no harm to the environment. Meanwhile, the invention also provides a preparation method of the porous light-weight carbon-based biological carrier. The preparation method has the advantages of simple process, less required equipment and low preparation cost.

Description

technical field [0001] The invention belongs to the technical field of biofilm treatment of wastewater, and specifically refers to a porous light carbon-based biological carrier and a preparation method thereof. Background technique [0002] Activated sludge treatment of wastewater has the advantages of mature technology, low operation and maintenance costs, and is the most commonly used method for domestic water treatment. However, the activated sludge process occupies a large area, has a lot of residual sludge, poor denitrification effect, and is prone to sludge. Due to the shortcomings of bulking and sludge loss, people use the biofilm method for biochemical treatment of wastewater. Since the successful operation of the biofilter, the biofilm method has been rapidly developed and applied in recent years due to its advantages of strong degradation ability, short contact time, small footprint and low investment cost. In the biofilm method, the microbial carrier material de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34
Inventor 张垒王丽娜刘璞付本全刘尚超段爱民张楠薛改凤王凯军刘霞
Owner 武汉钢铁有限公司
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