|Ma, Yanguo - UNIV. OF CALIF DAVIS|
|Zhang, Ruihong - UNIV. OF CALIF DAVIS|
|Mitloehner, Frank - UNIV. OF CALIF DAVIS|
Submitted to: American Society of Agricultural Engineers Meetings Papers
Publication Type: Proceedings
Publication Acceptance Date: July 17, 2005
Publication Date: July 17, 2005
Citation: Ma, Y., Zhang, R., Mitloehner, F., Mcgarvey, J.A. 2005. Gaseous emission reduction from dairy manure storages by anaerobic and aerobic treatment processes. American Society of Agricultural Engineers Meetings Papers. Paper No. 056020. Interpretive Summary: Dairy wastewater treatment is important to preserve environmental quality. We tested two different dairy waste treatment methods and compared the effectiveness of each. Both methods worked well and we will report the data on the reductions of nutrients and the emission of gaseous compounds.
Technical Abstract: The effects of different manure treatment strategies on the gaseous emissions (CO2, CH4, H2S, NH3, VFAs and VOCs from dairy manure storages were investigated in the laboratory. The dairy manure used in the study was screened from fresh dairy manure that had 2% volatile solids. The treatment strategies include anaerobic treatment and aerobic treatment prior to the manure storage and aerostation in manure storage at different oxygen supplies. Anaerobic treatment was provided using an anaerobic digester (4 L) operated at 35°C and 20 days hydraulic retention time (HRT) to reduce VS in the manure by at least 40% prior to storage. Aerobic treatment was provided using an aerobic reactor (2 L) operated at room temperature (20°C) and 5-day HRT to provide 80% VS removal from the manure. The aerobic reactor was fully aerated at dissolved oxygen of 2 ppm or above. The anaerobically or aerobically treated manure was loaded into a sealed storage vessel on daily basis over a period of six months. Anaerobic and aerobic treatments controls were also investigated.