TAN, Other Water Quality Factors Affect Nitrification Rates In Biofilters

摘要

An important criterion when studying biofilters is the conversion rate of total ammonia nitrogen (TAN) to nitrate-nitrogen in production water. Although nitrification rates have been based on media surface areas, they do not always reflect the actualnitrification achieved. Volumetric TAN conversion rate is a direct measure based on filter volume. The physical movement of ammonia nitrogen from culture tanks to and through biofilters can limit filtration activity. Bacterial biofilms reduce filter media diffusion. Placement of mechanical filtration directly before biological filters improves nitrification rates.