生活環境由来の硫酸塩とその動態(<特集>環境地質学)

概要

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Hydrogen sulfide is formed by sulfate reducing bacteria in sediments of lakes or estuaries which contain large amounts of organic compounds and sulfate. However, hydrogen sulfide is usually oxidized to elemental sulfur or sulfate by sulfur oxidizing bacteria forming thin biofilm on the surface of sediments. On the other hand, if this sulfur cycle is accomplished, environmental problems caused by sulfur compounds do not occur. On the other hand, if the biofilm is decomposed, sulfide is transported to water or air phase, resulting in the occurrence of problems such as release of nutrients, offensive odor and microbial corrosion of concrete cements. As for the sulfur compounds derived from domestic sources, the amounts of sulfate were quantitatively determined. The percentages of sulfate from tap water, detergents and urine were approximately 50%, 30%, and 15%, respectively. If influent sewage is anaerobic, hydrogen sulfide is formed, resultingin the occurence ofodor and microbial corrosion of concrete pipes. In anaerobic digestion, methane forming bacteria coexist with or compete against sulfate reducing bacteria.
地学団体研究会の論文
1993-05-25