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Low temperature prepn process of biological thiosulfate radical ion and hydrogen sulfide removing agent

A technology of thiosulfate and hydrogen sulfide, applied to methods using microorganisms, chemical instruments and methods, sustainable biological treatment, etc.

Inactive Publication Date: 2007-11-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, it has been reported that low-temperature bacteria with high biodegradability for organic substances such as COD and BOD, nitrogen and phosphorus, petroleum hydrocarbons, chlorophenols, aromatic hydrocarbons, fats, and surfactants in sewage have been isolated from low-temperature environments. However, there are no reports of low-temperature bacteria capable of degrading malodorous gases at low temperatures.

Method used

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  • Low temperature prepn process of biological thiosulfate radical ion and hydrogen sulfide removing agent

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specific Embodiment approach 1

[0005] Specific embodiment 1: In this embodiment, the preparation method of the biological remover of thiosulfate ion and hydrogen sulfide at low temperature is realized by the following steps: 1. Domestication: In February, the activated sludge of the sewage treatment plant is taken as the source of bacteria. Under the condition of an ambient temperature of 3~8℃, the activated sludge is inoculated into a biological trickling filter tower with activated carbon as the filler, and the concentration of 40~60mg / m is first introduced into the biological trickling filter tower. 3 H 2 S gas, then increase H within 30 to 90 days 2 S gas inlet concentration to 300~500mg / m 3 , And then start using H 2 The S detection tube detects the outgassing effect. When the outgassing effect remains stable, the domestication stage is completed; 2. Low-temperature bacteria screening: Take 3~5g of the domesticated filler inoculated with activated sludge, and take 100~110ml of sterile water for inoculation...

specific Embodiment approach 2

[0006] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, the activated sludge is inoculated into a biological trickling filter tower with activated carbon as a filler under the condition of an ambient temperature of 4 to 6°C. The other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0007] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 is that in step 1, the activated sludge is inoculated into a biological trickling filter tower with activated carbon as a filler under the condition of an ambient temperature of 5°C. The other steps are the same as in the first embodiment.

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Abstract

The process of preparing low temperature biological thiosulfate radical ion and hydrogen sulfide removing agent includes the following steps: 1. domesticating; 2. low temperature bacteria screening; and 3. preparing biological remover for removing thiosulfate radical ion and hydrogen sulfide at low temperature. Compared with medium temperature heterotrophic bacteria, the biological remover of the present invention has maximum thiosulfate radical ion removing rate of 62 %, contrasting to that of medium temperature heterotrophic bacteria in 29.8 %, and maximum hydrogen sulfide removing rate at 0-20 deg.c up to 100 %.

Description

Technical field [0001] The invention relates to a preparation method of a biological remover of thiosulfate ion and hydrogen sulfide. Background technique [0002] Biological treatment plays an increasingly important role in the treatment of pollutants such as sewage and odor due to its low cost, good effect and no secondary pollution. The effect of biological treatment is greatly affected by temperature. As the temperature decreases, biological activity becomes worse. Low temperature has always been a bottleneck for biological treatment. When the water temperature is below 10°C, most mesophilic bacteria can no longer metabolize exogenous substances from cells. At this time, cold-adapted microorganisms play a major role in the sewage treatment process. According to Morita's classification and definition, there are two types of low-temperature microorganisms. One is the microorganisms whose maximum growth temperature is lower than 20℃, called psychrophilic bacteria, and the other ...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F3/04C02F3/10C02F1/58C12N1/20C12N1/36
CPCY02W10/10
Inventor 徐桂芹王海燕张英民姜安玺
Owner HARBIN INST OF TECH
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