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Anaerobic organism fluidized bed mixed carrier for treating industrial waste water and application of anaerobic organism fluidized bed mixed carrier

A mixed carrier, anaerobic biological technology, used in anaerobic digestion treatment, special compound water treatment, biological water/sewage treatment, etc. It can improve the effective utilization rate, reduce energy consumption and improve processing efficiency.

Active Publication Date: 2015-03-25
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of high fluidization energy consumption caused by the large specific gravity of the traditional biological fluidized bed carrier, too small specific gravity, easy to accumulate on the top of the bed to form a suspended bed, and small porosity, poor hydrophilicity and biological affinity, and not easy to hang In order to solve the shortcomings of membranes, a kind of anaerobic biological treatment of industrial wastewater with suitable density, large pore size, strong adsorption capacity, good bio-affinity, and easy microbial film formation is provided by using activated carbon, diatomite, and resin as basic raw materials. Fluidized bed mixed carrier, another object of the present invention is to provide the application of above-mentioned anaerobic biological fluidized bed mixed carrier

Method used

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  • Anaerobic organism fluidized bed mixed carrier for treating industrial waste water and application of anaerobic organism fluidized bed mixed carrier
  • Anaerobic organism fluidized bed mixed carrier for treating industrial waste water and application of anaerobic organism fluidized bed mixed carrier
  • Anaerobic organism fluidized bed mixed carrier for treating industrial waste water and application of anaerobic organism fluidized bed mixed carrier

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Experimental program
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Effect test

Embodiment 1

[0025] Prepare the mixed carrier as follows:

[0026] A. Activated carbon modification:

[0027] 1) Use coconut shell activated carbon and wood activated carbon with a particle size of 0.7mm and a specific gravity of 1.1g / mL as raw materials, with a volume ratio of 1:1, boil with distilled water, wash and dry, and mix the activated carbon with nitric acid and sulfuric acid at 312°C Activation in solution for 3h, surface modification and pore expansion reaction.

[0028] B. Diatomite modification:

[0029] 1) Use diatomite with a particle size of 0.9mm as raw material, wash and air-dry the diatomite, then put the diatomite into 2mol / L potassium hydroxide solution, stir and soak for 6.5h at 82°C, and put After soaking, the diatomaceous earth is washed and air-dried;

[0030] 2) Put the diatomite obtained in 1) into a sulfuric acid solution with pH=2, stir and soak for 2 hours, wash and air-dry the soaked diatomite;

[0031] 3) Calcining the diatomite obtained in 2) at a temp...

Embodiment 2

[0040] A. Activated carbon modification:

[0041] 1) Use coconut shell activated carbon, wood activated carbon, and fruit shell activated carbon with a particle size of 1.0mm and a specific gravity of 1.2g / mL as raw materials. The volume ratio is 1:2:1. , Nitric acid and sulfuric acid mixed solution for activation for 4h to carry out surface modification and pore expansion reaction.

[0042] B. Diatomite modification:

[0043] 1) Use diatomite with a particle size of 1.0mm as the raw material, wash and air-dry the diatomite, then put the diatomite into a mixed solution of 3mol / L sodium hydroxide and potassium hydroxide, at 82°C Stir and soak for 7 hours, wash and air-dry the soaked diatomaceous earth;

[0044] 2) Put the diatomite obtained in 1) in a sulfuric acid solution with pH=4, stir and soak for 2.5 hours, wash and air-dry the soaked diatomite;

[0045] 3) Calcining the diatomite obtained in 2) at a temperature of 500° C. for 1.6 h, cooling the calcined diatomite with...

Embodiment 3

[0055] A. Activated carbon modification:

[0056] 1) Use coconut shell activated carbon, wood activated carbon, fruit shell activated carbon, and rubber-plastic activated carbon with a particle size of 1.9mm and a specific gravity of 1.3g / mL as raw materials, with a volume ratio of 3:1:1:1, boil with distilled water, wash and dry After drying, activated carbon was activated in nitric acid solution at 345°C for 3.5h to carry out surface modification and pore expansion reactions.

[0057] B. Diatomite modification:

[0058] 1) Use diatomite with a particle size of 1.6mm as raw material, wash and air-dry the diatomite, then put the diatomite into a 5mol / L sodium hydroxide solution, stir and soak it at 84°C for 7.5h, and put After soaking, the diatomaceous earth is washed and air-dried;

[0059] 2) Put the diatomite obtained in 1) into a mixed solution of sulfuric acid and nitric acid at pH=3, stir and soak for 3 hours, wash and air-dry the soaked diatomite;

[0060] 3) Calcini...

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Abstract

The invention discloses an anaerobic organism fluidized bed mixed carrier for treating industrial waste water and application of the anaerobic organism fluidized bed mixed carrier. The anaerobic organism fluidized bed mixed carrier is characterized by consisting of modified active carbon, modified kieselguhr and modified resin, wherein the volume of the modified active carbon is 55%-62% of that of the mixed carrier; the volume of the modified resin is 31%-42% of that of the mixed carrier; the volume of the modified kieselguhr is 3%-7% of that of the mixed carrier. In the application, the total volume of the mixed carrier is 9%-11% of the total volume of the anaerobic organism fluidized bed. By the application of the mixed carrier in the organism fluidized bed, the mass transfer efficiency can be improved, the energy consumption can be reduced, the sludge yield is can be reduced, the HRT(hydraulic retention time) can be shortened, and the impact load endurance of the anaerobic organism fluidized bed is relatively high, so that when industrial waste water is treated by utilizing the mixed carrier anaerobic organism fluidized bed, the chemical oxygen demand removing effect is far higher than the effect of the traditional anaerobic organism treatment method.

Description

technical field [0001] The invention relates to an anaerobic biological fluidized bed mixed carrier for treating industrial waste water and its application, belonging to the field of waste water treatment. Background technique [0002] The types of pollutants in industrial wastewater are complex, the concentration is high, and they contain a large amount of refractory organic matter, heavy metals, nitrogen and phosphorus that cause eutrophication of water bodies, and other substances that are harmful to human health, such as fluorine. Traditional anaerobic treatment methods have poor treatment effects. , large sludge output, long sludge age and other issues. The biological fluidized bed reactor (biological fluidized bed reactor, FBBR) is a kind of wastewater treatment reactor with the characteristics of both attached growth and suspended growth of microorganisms. Compared with traditional sewage biochemical treatment technology, biological fluidized bed has a high concentrat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26C02F3/28C02F1/28
CPCC02F3/2806C02F3/2833C02F2003/003C02F2305/06
Inventor 沈树宝赵金龙谢实涛李凯祝社民
Owner NANJING UNIV OF TECH
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