Nitrous Oxide Emissions from Municipal Wastewater Treatment

摘要

Nitrous oxide (N_2O) emissions from primary and secondary wastewater treatment processes were measured during spring and summer 1993 in Durham, NH. The most significant emissions occurred during secondary aeration. Dissolved N_2O generated as a result of denitrification during primary settling was stripped from the liquid during mechanical aeration. Emission factors derived from our field measurements included per capita emissions of 3.2 g of N_2O person~(-1) yr~(-1) and flow based emissions of 1.6 x 10~(-6) pf N_2O (L of wastewater)~(-1).