Exploratory study of polycyclic aromatic hydrocarbons occurrence and distribution in manure pyrolysis products

The occurrence and distribution of polycyclic aromatic hydrocarbons (PAH) have been investigated in the products derived from pyrolysis pig manure at low temperatures (<550 °C) a fixed bed reactor. focus was on sixteen PAH identified as priority pollutants by US Environment Protection Agency (EPA). does not generate significant additional amount EPA-PAH to that existing original manure, under operational conditions studied °C). While total yield indicate notable dependence temperature, among three well speciation changed significantly with temperature. proportion heavy species increased temperature increased. initial samples plays role both their concentration biochar. relationship biochar those raw material corroborated cow sample biochars obtained its pyrolysis. For this reason, feedstocks concentrations are recommended order obtain below maximum allowed threshold established for use soil enhancer International Biochar Initiative (IBI) European Certificate.