Sulfur dioxide. The specific person who discovered sulfur dioxide is not known, but it was first used by the Romans in winemaking, when they discovered that burning sulfur candles inside empty wine vessels keeps them fresh and free from vinegar smell.[2] Structure and bonding[edit] The sulfur - oxygen bond has a bond order of 1.5.
Microbial conversion of sulfur dioxide in flu... [J Hazard Mater. 2007. Applied Biochemistry and Biotechnology, Volume 57-58, Number 1. A considerable increase in soluble COD and organic acid concentrations was achieved in a continuous process for AD-MSS medium preparation.
This reactor utilized less DAF solids and chloroform, and used no additional salts compared with previous investigations. It resulted in a COD of 5000 mg/L, double that of previous studies.