Ozonation Combined with Electrolysis of Night Soil Treated by Biological Nitrification-Denitrification Process

摘要

Ozonation combined with electrolysis with a two-compartment electrolytic flow cell was developed and its applicability to ammonia nitrogen (NH_4~+-N) and total organic carbon (TOC) removal in effluent from a night soil treatment facility was discussed. The developed flow cell with an anion exchanged membrane as a separator was effective to remove NH_4~+-N by electrochemically generated chlorine and TOC by hydroxyl radical generated via catho-dic reduction of ozone. Total nitrogen (TN) removal efficiency under the optimal condition reached to 75 and TOC removal efficiency maximally reached to 47.