Biological desulfurization skills include biofiltration, biosorption and trickle filtration. These three microbial systems change with the environment.、
Characteristics of biological desulfurization?
1. High efficiency:? The removal rate of hydrogen sulfide is 98.5%
2. High adaptive range:? Can handle hydrogen sulfide concentration up to 1.5%? （15000ppm）
3. Low cost:? Compared with other desulfurization skills, the operation cost is low
4. High security:? It is equipped with a variety of protection devices
5. Unattended:? The system operates automatically through the on-line monitoring system
6. Simple maintenance:? A small amount of maintenance work? (e.g. periodic calibration of pH probe)
Three steps of biological desulfurization:
The contact between waste gas and water or water film on solid surface is molecules or ions dissolved in water or liquid phase, that is, odor substances are transferred from gas phase to liquid phase, which is Henry's law of physical process.
Adsorption and absorption
The odor components in the aqueous solution are absorbed by microorganisms. Water is transferred from the water to microorganisms, and the water as an absorbent is regenerated and recycled, and then the new odorous components are dissolved.
The odor components entering the microbial cell body are divided into kinetic energy or nutrients of microbial life activities, so as to remove pollutants.
Substances entering the microbial cell body are oxidized and differentiated by enzymes in the cell body to synthesize and produce new microbial cell bodies.
There are three similar steps to explain the biological treatment of sulfur-containing waste gas by using the double membrane biofilm Theory:
Sulfur containing gas contacts with water or the water film on the solid surface. The sulfur in the gas dissolves in water and becomes molecules or ions in the liquid phase. Sulfur is transferred from the gas phase to the liquid phase. This process is a physical process and follows Henry's law.
The sulfur in the aqueous solution diffuses into the biofilm and is absorbed by microorganisms under the promotion of concentration difference. Sulfur is converted from water to microorganisms as nutrition and energy for microorganisms.
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