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Photocatalysis and biotreatment combined drinking water treatment method

A technology of drinking water treatment and photocatalysis, which is applied in the field of water treatment, can solve the problems of poor ammonia nitrogen removal effect, high cost, and excessive microbial indicators in effluent, and achieve good removal effect, improved efficiency, and high water treatment efficiency.

Active Publication Date: 2010-12-08
HARBIN INST OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problems of high cost and poor ammonia nitrogen removal effect of the photocatalytic water treatment method, as well as the low efficiency of biological water treatment and the excessive microbial index of the effluent, the present invention provides a drinking water treatment method combined with photocatalysis and biology

Method used

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  • Photocatalysis and biotreatment combined drinking water treatment method
  • Photocatalysis and biotreatment combined drinking water treatment method
  • Photocatalysis and biotreatment combined drinking water treatment method

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specific Embodiment approach 1

[0009] Specific Embodiment 1: The drinking water treatment method of this embodiment combined with photocatalysis and biology is carried out according to the following steps: 1. Use a pump to press the raw water into the photocatalytic reactor, and then add the photocatalyst to the photocatalytic reactor Mix evenly, control the pH value of the photocatalytic reactor to 2~12, the hydraulic retention time is 10min~480min, and the light source intensity is 0.1~20mW / cm 2 , where the amount of photocatalyst added is 0.1-5g of photocatalyst per liter of photocatalytic reactor volume; 2. The raw water after photocatalytic treatment is filtered by the lower membrane module of the photocatalytic reactor and enters the biofilter for biological treatment. Treatment, control the filtration rate of the biofilter to 1-20m / h, and then effluent after being filtered by the filter material of the biofilter; 3. Return the effluent from step 2 from the upper part to the photocatalytic reactor for ...

specific Embodiment approach 2

[0011] Embodiment 2: This embodiment is different from Embodiment 1 in that the pH value of the photocatalytic reactor in Step 1 is 4-10. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0012] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the hydraulic retention time of the photocatalytic reactor in Step 1 is 15 min to 360 min. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a photocatalysis and biological treatment combined drinking water treatment method. The invention relates to a water treatment method. The invention solves the problems that a photocatalysis water treatment method has high cost, difficult degradation, low efficiency of biological organic matter degradation and bad effects of removing ammonia nitrogen; and the microbe content in the water treated by a biological method is incapable of reaching standards. The method comprises the following steps: 1, introducing raw water into a photocatalytic reactor for carrying out a photocatalytic reaction; 2, carrying out the biological treatment of the water processed in step 1; and returning the outputted water after the biological treatment to the photocatalytic reactor for sterilization, and realizing the treatment of the raw water. The water treatment technology combining the photocatalysis and biological treatment has low cost and high water treatment efficiency. The microbe content in the treated water meets the drinking water sanitary standards. The method is suitable for the treatment of drinking water.

Description

technical field [0001] The invention relates to a water treatment method. Background technique [0002] Photocatalysis is a promising new technology for water treatment. Because it can use sunlight or ultraviolet light to degrade a variety of pollutants, it has broad application prospects. Photocatalytic technology uses semiconductor materials as catalysts. When light with energy equivalent to the forbidden band width of the semiconductor is irradiated on the surface of the catalyst, the electrons in the semiconductor will be excited to transition from the valence band to the conduction band, forming highly active electron-holes. Yes, and further induce a series of oxidation-reduction reactions to achieve the purpose of removing pollutants. However, the current photocatalytic water treatment method is costly, and the photocatalytic method has poor removal effect on ammonia nitrogen in water. As an economical, reasonable and effective means of water pollution control, biolog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/30C02F3/34
CPCY02W10/37
Inventor 于水利严晓菊李力争安延涛
Owner HARBIN INST OF TECH
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