Influence of Low C/N on the Nitrogen Changing in the Composting

Co-composting in low C/N of 15, 20 and 25 using poultry manure, municipal solid waste and corn straw as raw composting material were conducted to validate the possibility of composting in low C/N. Nitrogen transformation were determined at different composting stages. During the composting, the total nitrogen reduced gradually with the composting time. The lower the C/N ratio, the higher total nitrogen concentration find in the final. The NH4+-N decreased during the high temperature period. The NO3--N increased after high temperature period. The concentration of usable nitrogen was increased after composting. The lower C/N ratio, the higher usable nitrogen received.