Cost-effective technologies are needed to reach the international greenhouse gas (GHG) reduction targets 25 in many fields, including waste and biomass treatment. This work reports the effects of CO2 capture from 26 a combustion flue gas and its use in a newly-patented, two-phase anaerobic digestion (TPAD) process, to improve energy recovery and to reduce CO2 emissions. A TPAD process, fed with urban wastewater 28 sludge, was successfully established and maintained for several months at pilot scale. The TPAD process with injection of CO2 exhibits efficient biomass degradation (58% VSS reduction), increased VFA production during the acidogenic phase (leading to VFA concentration of 8.4 g/L) and high biomethane production (0.350 Sm3/kgSSV; 0.363 Sm3/m3 reactd). Moreover, CO2 intake in the acid phase has a positive impacton the overall GHG balance associated to biomethane production, and suggests an improved solution for both emission reduction and biomass conversion into biomethane.
Salomoni C., Caputo A., Bonoli M., Francioso O., Rodriguez-Estrada M.T., Palenzona D. (2011). ENHANCED METHANE PRODUCTION IN A TWO-PHASE ANAEROBIC DIGESTION PLANT, AFTER CO2 CAPTURE AND ADDITION TO ORGANIC WASTES. BIORESOURCE TECHNOLOGY, 102, 6443-6448 [10.1016/j.biortech.2011.03.079].
ENHANCED METHANE PRODUCTION IN A TWO-PHASE ANAEROBIC DIGESTION PLANT, AFTER CO2 CAPTURE AND ADDITION TO ORGANIC WASTES
FRANCIOSO, ORNELLA;RODRIGUEZ ESTRADA, MARIA TERESA;PALENZONA, DOMENICO
2011
Abstract
Cost-effective technologies are needed to reach the international greenhouse gas (GHG) reduction targets 25 in many fields, including waste and biomass treatment. This work reports the effects of CO2 capture from 26 a combustion flue gas and its use in a newly-patented, two-phase anaerobic digestion (TPAD) process, to improve energy recovery and to reduce CO2 emissions. A TPAD process, fed with urban wastewater 28 sludge, was successfully established and maintained for several months at pilot scale. The TPAD process with injection of CO2 exhibits efficient biomass degradation (58% VSS reduction), increased VFA production during the acidogenic phase (leading to VFA concentration of 8.4 g/L) and high biomethane production (0.350 Sm3/kgSSV; 0.363 Sm3/m3 reactd). Moreover, CO2 intake in the acid phase has a positive impacton the overall GHG balance associated to biomethane production, and suggests an improved solution for both emission reduction and biomass conversion into biomethane.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
