EFFECT OF COPER SULFATE ADDITION ON NITROUS- OXIDE EMISSION IN HIGH SPEED DENITRIFICATION PROCESS USING MACRO-POROUS CELLULOSE CARRIER

摘要

Nitrous oxide emission from the immobilized denitrification process was investigated under copper-added and copper-free conditions to realize high speed denitrification with minimum nitrous oxide emission. Nitrous oxide emission was found to be smaller in culture using immobilized cells acclimatized under copper-added condition. Transient phenomena of nitrous oxide emission, nitrate reduction and nitrite accumulation wee then investigated in repeated batch experiments by transferring immobilized cells acclimatized in copper-free conditions into copper-added medium.