Anaerobic co-digestion of chicken manure and corn stover in batch and CSTR were investigated. The
batch co-digestion tests were performed at an initial volatile solid (VS) concentration of 3 g VS/L, car-
bon-to-nitrogen (C/N) ratio of 20, and retention time of 30 d. The methane yield was determined to be
281 ± 12 mL/g VSadded. Continuous reactor was carried out with feeding concentration of 12% total solids
and C/N ratio of 20 at organic loading rates (OLRs) of 1–4 g VS/L/d. Results showed that at OLR of 4 g VS/L/
d, stable and preferable methane yield of 223 ± 7 mL/g VSadded was found, which was equal to energy
yield (EY) of 8.0 ± 0.3 MJ/kg VSadded. Post-digestion of digestate gave extra EY of 1.5–2.6 MJ/kg VSadded.
Pyrolysis of digestate provided additional EY of 6.1 MJ/kg VSadded. Pyrolysis can be a promising technique
to reduce biogas residues and to produce valuable gas products simultaneously.