TY - JOUR
T1 - Anaerobic monodigestion of poultry manure
T2 - Determination of operational parameters for CSTR
AU - Chamy, R.
AU - León, C.
AU - Vivanco, E.
AU - Poirrier, P.
AU - Ramos, C.
PY - 2012
Y1 - 2012
N2 - In this work the anaerobic monodigestion for the treatment of turkey manure was evaluated, without its codigestion with another substrate. The effect of the organic loading rate (OLR) and the substrate concentration (high total solids (TS) concentration) or product concentration (high volatile fatty acids (VFA) and/or ammonia (NH 3-N) concentrations) was studied. The results show that for a continuous stirred tank reactor (CSTR) operation, a maximum of 40 g/L of TS and 4.0 g/L of ammonium (NH 4 +) was required. In addition, the maximum organic loading rate (OLR) will not exceed 1.5 kg VS/m 3d. Higher TS and NH 4 + concentrations and OLR lead to a reduction on the methane productivity and volatile solids (VS) removal. During the CSTR operation, a high alkalinity concentration (above 10 g/L CaCO 3) was found; this situation allowed maintaining a constant and appropriate pH (close to 7.8), despite the VFA accumulation. In this sense, the alkalinity ratio (α) is a more appropriate control and monitoring parameter of the reactor operation compared to pH. Additionally, with this parameter a VS removal of 80% with a methane productivity of 0.50 m 3 CH4/m 3 Rd is achieved.
AB - In this work the anaerobic monodigestion for the treatment of turkey manure was evaluated, without its codigestion with another substrate. The effect of the organic loading rate (OLR) and the substrate concentration (high total solids (TS) concentration) or product concentration (high volatile fatty acids (VFA) and/or ammonia (NH 3-N) concentrations) was studied. The results show that for a continuous stirred tank reactor (CSTR) operation, a maximum of 40 g/L of TS and 4.0 g/L of ammonium (NH 4 +) was required. In addition, the maximum organic loading rate (OLR) will not exceed 1.5 kg VS/m 3d. Higher TS and NH 4 + concentrations and OLR lead to a reduction on the methane productivity and volatile solids (VS) removal. During the CSTR operation, a high alkalinity concentration (above 10 g/L CaCO 3) was found; this situation allowed maintaining a constant and appropriate pH (close to 7.8), despite the VFA accumulation. In this sense, the alkalinity ratio (α) is a more appropriate control and monitoring parameter of the reactor operation compared to pH. Additionally, with this parameter a VS removal of 80% with a methane productivity of 0.50 m 3 CH4/m 3 Rd is achieved.
KW - Biomethanization
KW - Continuous stirred tank reactor
KW - Solid wastes
KW - Turkey manure
UR - http://www.scopus.com/inward/record.url?scp=84855892280&partnerID=8YFLogxK
U2 - 10.2166/wst.2011.714
DO - 10.2166/wst.2011.714
M3 - Article
C2 - 22173408
AN - SCOPUS:84855892280
SN - 0273-1223
VL - 65
SP - 53
EP - 59
JO - Water Science and Technology
JF - Water Science and Technology
IS - 1
ER -