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Biological activated carbon for degrading sewage COD and preparation method thereof

A biological activated carbon and sewage degradation technology, applied in the direction of microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve the problems affecting the adsorption performance of macropores and some mesopores in the structure of activated carbon, the growth and reproduction ability of bacteria, and the degradation performance Large, unstable combination of biofilm and activated carbon, etc., to achieve the effect of high market application value, good removal effect, and low production cost

Inactive Publication Date: 2017-08-18
广东韩研活性炭科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the microorganisms adsorbed by activated carbon are all derived from the natural environment, the growth and reproduction ability and degradation performance of the bacteria are largely unknown, resulting in different lengths of natural domestication, different time for biofilm formation, and inconsistent combination of biofilm and activated carbon. Stable, easily damaged by the influence of temperature, pollutant concentration, and pH value in the environment, and may even be pathogenic, and the biofilm formed by the microorganisms naturally adsorbed by activated carbon is relatively dense, which will affect the macropores and macropores in the activated carbon structure. Adsorption properties of some mesopores

Method used

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Examples

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preparation example Construction

[0023] A preparation method for bioactive carbon for degrading sewage COD, comprising the following steps:

[0024] 1) Screening, domestication, expanded cultivation and compounding of bacterial strains: select corresponding bacterial strains according to the types and contents of main pollutants in sewage, first carry out domestication and expanded cultivation respectively, and then carry out compounding to obtain compound bacterial strains;

[0025] 2) Pretreatment of activated carbon: Soak the activated carbon with hydrochloric acid for pretreatment, then separate the activated carbon and fully dry it;

[0026] 3) Preparation of biological activated carbon: uniformly mix the pretreated activated carbon and composite strains, culture at a constant temperature of 28-37° C. for 20-30 hours, and fully dry to obtain biological activated carbon.

[0027] Preferably, the medium in step 1) is beef extract liquid medium or beef extract solid medium, pH=7.2-7.5, and the composition o...

Embodiment 1

[0039] The sewage is wastewater from a food processing factory, the COD is nitrate nitrogen, and the selected bacteria are aerobic denitrifying Bacillus, Bacillus subtilis and Bacillus licheniformis.

[0040] 1) Screening, domestication, expanded cultivation and recombination of strains: Sewage or soil samples were collected near the waste water outfall of a food processing factory, and then inoculated on beef extract liquid medium with a potassium nitrate concentration of 500 mg / L. Enrichment culture at 30°C on a shaker for 4 days, and then inoculate the acclimatization culture solution on the beef extract liquid medium with a potassium nitrate concentration of 600mg / L according to the inoculum size of 5%, and enrich and cultivate at 30°C on a shaker for 4 days. Then increase the concentration of potassium nitrate substrate by 100 mg / L each time, and carry out cyclic acclimatization until the concentration of potassium nitrate is 1000 mg / L, then separate the strains in the acc...

Embodiment 2

[0048] The sewage is the wastewater produced by a herbicide factory, the COD is diclopyridine, and the selected bacteria are diclopyridine degrading bacillus, colloid bacillus, subtilis and licheniformis which have the function of diclopyridine degradation.

[0049]1) Screening, acclimatization, expanded cultivation and recombination of strains: collect sewage or soil samples near the wastewater outfall of a herbicide factory, and then inoculate them on beef extract liquid medium with a diclopyridine concentration of 500 mg / L. Enrichment culture on a shaker at 35°C for 3 days, then inoculate the acclimatization culture solution on the beef extract liquid medium with a diclopyridine concentration of 600mg / L according to the inoculum size of 3%, and enrich and culture on a shaker at 30°C for 4 days day, and then increase the concentration of the substrate diclopyridine by 100mg / L each time, and carry out cyclic acclimation until the concentration of diclopyridine is 1000mg / L, the...

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Abstract

The invention discloses biological activated carbon for degrading sewage COD and a preparation method thereof. The preparation method for the biological activated carbon comprises the following steps: 1) screening strains, domesticating, performing amplification culture and compounding, thereby acquiring compound strains; 2) pre-treating the activated carbon; and 3) preparing the biological activated carbon: uniformly mixing the pre-treated activated carbon and compound strains, culturing for 20-30 hours under constant temperature of 28-37 DEG C and fully drying. The biological activated carbon disclosed by the invention has the advantages of large specific surface area, strong adsorption capacity, excellent effect of removing COD in sewage, simple preparation process and low production cost; the compound flora on the biological activated carbon can specifically degrade the main COD components in the sewage; the formed biological film has a certain adsorption function, so that the biological activated carbon has dual adsorption capacities of the COD adsorption biological film and the activated carbon adsorption carrier; the service life of the biological activated carbon is prolonged; the dosage of the activated carbon in a sewage treatment process is reduced; and the market application value is high.

Description

technical field [0001] The invention relates to a biological activated carbon for degrading sewage COD and a preparation method thereof, belonging to the technical field of sewage treatment. Background technique [0002] With the in-depth development of modern industry, there are more and more types of sewage and waste gas produced by industry, and the composition of COD in sewage is becoming more and more complex. COD (Chemical Oxygen Demand) is chemical oxygen demand, also known as chemical oxygen demand, which is used to reflect the amount of reducing substances that need to be oxidized in sewage. It is used in the research of river pollution and industrial sewage properties and the operation and management of sewage treatment plants. , which is an important parameter of organic pollution that can be determined quickly. [0003] At present, activated carbon is mostly used as an adsorption carrier in the field of sewage treatment technology. Activated carbon adsorbs pollu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N11/14C02F3/34C12R1/07C12R1/38
CPCC02F3/34C12N11/14
Inventor 韩初榆厉大伟徐海健李雁
Owner 广东韩研活性炭科技股份有限公司
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