Study on odor control during chicken manure compost by microbial preparation EM

The microbial preparation EM has been used as an additive to chicken manure compcot for decompositioncomparison tests. The results show that the NH-N contents of EM treatment are 41.86% (10 days)to 56. 71 %(20days) less than that of the controls and the NH-N emitted from EM treatment reduced significantly. In the late peri-od of EM treatment composting,a relatively strong brewery fragrance could be smelled,indlcating its high efficiency ofodor control.In addition,it can shorten the pollutlon-free treatment period to 20 days. Those effects are resulted fromEM introduced outside microbials.