Denitrifying Filter + Sodium Acetate: Deep Denitrification Combined Process

Denitrifying deep-bed filter (DNBF) combined with sodium acetate carbon source is a common deep denitrification combination: carbon source attached in the filter promotes biofilm denitrification while removing suspended solids.

Sodium acetate is dosed with filter influent, completing denitrification via filter media biofilm, suitable for Class 1A upgrade and quasi-Class IV retrofit. The process has small footprint and stable effluent; sodium acetate dosage follows influent nitrate and bench tests.