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Modified biofilm carrier as well as preparation method and application thereof

A biofilm carrier and modification technology, applied in sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve problems such as easy pollution, increased modification cost, and limited application of modified carbon fiber

Active Publication Date: 2021-05-21
陈彤
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing technologies for modifying carbon fiber materials mainly include electrochemical modification, wet modification (including acidic oxidation, alkaline oxidation), cationic loading, and chemical grafting. Soak carbon fiber products in ethanol or acetone, wash off the resin slurry on the surface of the fiber, and then modify it after drying. A large amount of organic solvents will be generated during the modification process, which not only increases the modification cost but also easily produces pollution, which is not conducive to industrialization. The application of modified carbon fiber in the field of biofilm carrier

Method used

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  • Modified biofilm carrier as well as preparation method and application thereof
  • Modified biofilm carrier as well as preparation method and application thereof
  • Modified biofilm carrier as well as preparation method and application thereof

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preparation example Construction

[0026] The invention provides a preparation method of a modified biological carrier, comprising the following steps:

[0027] The carbon fiber is subjected to the first heat preservation and the second heat preservation in sequence to obtain the modified biofilm carrier; the temperature of the first heat preservation is 150-250°C; the temperature of the second heat preservation is 250-650°C.

[0028] In the present invention, the carbon fiber is subjected to the first heat preservation to obtain the desizing carbon fiber.

[0029] In the present invention, the carbon fibers preferably include one or more of polyacrylonitrile-based carbon fibers, pitch-based carbon fibers, viscose-based carbon fibers and lignin-based carbon fibers. In the present invention, there is no special limitation on the source of the carbon fiber, and sources well-known to those skilled in the art can be used, specifically commercially available. In the present invention, the carbon fibers are preferab...

Embodiment 1

[0046] The raw material carbon fibers used in this example were purchased from Jiangsu, and were polyacrylonitrile-based carbon fibers.

[0047] Put the carbon fiber in a high-temperature furnace, raise the temperature to 200°C at a heating rate of 10°C / min, and keep it at 200°C for 10 minutes to obtain desizing carbon fiber; without converting equipment, heat the obtained desizing carbon fiber at a heating rate of 8°C / min The temperature was raised to 350° C. and kept at 350° C. for 3 hours, followed by cooling down in the furnace to obtain a modified biofilm carrier.

Embodiment 2

[0061] The raw material carbon fibers used in this example were purchased from Zhejiang Province and were polyacrylonitrile-based carbon fibers.

[0062] Put the carbon fiber in a high-temperature furnace, raise the temperature to 150°C at a heating rate of 12°C / min and keep it warm at 150°C for 15 minutes to obtain desizing carbon fiber; no need to convert equipment, heat the obtained desizing carbon fiber at a heating rate of 10°C / min The temperature was raised to 400° C. and kept at 400° C. for 2.5 hours, followed by cooling down in the furnace to obtain a modified biofilm carrier.

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Abstract

The invention belongs to the technical field of biofilm carriers, and particularly relates to a modified biofilm carrier as well as a preparation method and application thereof. The invention provides a preparation method of a modified biological carrier, which comprises the following steps: sequentially carrying out first heat preservation and second heat preservation on carbon fibers to obtain the modified biological membrane carrier, wherein the temperature of the first heat preservation is 150-250 DEG C; the temperature of the second heat preservation is 250-650 DEG C. According to the preparation method provided by the invention, the resin slurry on the surface of the carbon fiber can be decomposed through the first heat preservation stage treatment, and a large amount of organic solvent is prevented from being used for soaking, washing and desizing, so that expanded production is facilitated; in the second heat preservation stage, carbon fiber oxidation and ignition loss are promoted, and carbon fiber modification is achieved. Experimental results show that after the modified biofilm carrier provided by the invention operates for a long time, the carbon fiber biomass per unit mass of an aerobic unit can reach 10-12g / g, and the carbon fiber biomass per unit mass of an anoxic unit can reach 3-5g / g.

Description

technical field [0001] The invention belongs to the technical field of biofilm carriers, and in particular relates to a modified biofilm carrier and its preparation method and application. Background technique [0002] Biofilm method is one of the main methods of sewage treatment. Biofilm method has strong adaptability to changes in sewage water quality and water volume, produces less sludge, and has no sludge bulking problem, especially for low-concentration sewage. Effect, has been widely used in the treatment of urban sewage and industrial wastewater. Biofilm is the basis of biofilm treatment. The production and growth of biofilm cannot be separated from the use of carrier materials. Water treatment biofilm carrier is the medium required for the biological cell and enzyme immobilization process of the biofilm method used in the secondary biological treatment of urban sewage and industrial wastewater. It is in the bioreactor or biochemical pool in the biochemical stage, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/10C02F3/28C02F3/00
CPCC02F3/108C02F3/109C02F3/2806C02F3/00Y02W10/10
Inventor 陈彤胡清刘欣邱军付马林胡滨郑自豪杨贇恺程玉欣
Owner 陈彤
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