A floating chamber for estimating nitrous oxide emissions from farm scale treatment units for livestock wastes

摘要

A floating rectangular polyvinyl chloride (PVC) open bottom chamber coupled with a molecular sieve trap was designed to measure the amounts of nitrous oxide gas (N{sub}2O) emitted during aerobic treatment or storage of liquid animal slurries. Anumber of outdoor calibration trials, using water and a standard gas mixture, resulted in an average N{sub}2O recovery of 79± 8%. Further experiments carried out on a farm scale aerobic treatment unit confirmed the reliability and ease of use of themethod.