Bioregenerative flue gas desulphurization.

摘要

Flue gas (12) is desulphurized using a bioregenerated reagent (224) in a system in which the flue gas (12), reagent (204) and water (52) are provided to an absorber (202) for producing a reaction in order for the reagent to absorb sulphur from the flue gas (12). The spent reagent (208) from the absorber (202) is provided to a digester reactor (210) wherein sulphur-reducing bacteria are used to regenerate the reagent. Gases produced by the digester reactor (210), such as H2S, are collected by a gas collector (214) for further processing. A separator (220) is used to separate the product (212) produced in the digester reactor (210) into regenerated reagent (224) and organic solids (222) so that the regenerated reagent (224) can be provided back into the absorber (202). A nutrient source (228) such as organic waste sludge from municipal waste water treatment plants can be used to promote growth of the sulphur-reducing bacteria. Means are provided to monitor and control various parameters affecting bacterial growth, such as temperature (230), pH (232), oxygen content (234), and flow rate (236) of the nutrient into the digester reactor (210). <IMAGE>