Carbon dioxide and methane emission from slurry storage of swine farm in summer

Li Na, Dong Hongmin※, Zhu Zhiping, Han Lei, Huang Yefei (Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Animal Environmental Facility Surveillance, Inspection & Testing Center / Beijing, Ministry of Agriculture, Beijing 100081, China)

farm building, septic tank, greenhouse gas, methane, carbon dioxide, emission control, flux

Swine manure is one of the important sources of carbon dioxide and methane. The objective of this research was to provide greenhouse gas (GHG) emission factor of slurry storage in higher temperature summer season based on the experiment. To investigate GHG emission from swine manure storage facilities, dynamic chamber system was applied to monitor the GHG emission of swine farm in June 2007. When the average ambient temperature was 28.43℃, the experiment results showed that about 86% of GHG emissions were emitted from first septic tank and second septic tank , GHG fluxes of three-well septic tanks were 407.5, 383.0, 127.7 mg/(m2·h) CO2 equivalent, respectively. CH4 was the major greenhouse gas in this manure storage system, and CH4 emission contributed to about 95%, 96% and 95% of the total GHG in CO2-equivalents. So, mitigating CH4 emission from first septic tank and second septic tank will effectively reduce the GHG emission from this slurry storage of swine farm.