Electro-chemically improved bio-degradation of municipal sewage

Biofilm-electrode reactor and activated sludge-electrode reactor were developed based on biofilm reactor and activated sludge reactor. The effect of electro-chemical reaction on the bio-degradation of municipal sewage was examined by the comparison experiments. Denitrification was improved by combining biofilm process with electro-chemical effect in a single novel reactor and sludge bulking was compacted for the introduction of electrode in activated sludge system.