RT journal article
T1 Improvement of biomethane potential of sewage sludge anaerobic co-digestion by addition of “sherry-wine” distillery wastewater
A1 Ripoll, Vanessa
A1 Agabo García, Cristina
A1 Pérez García, Montserrat
A1 Solera del Río, María del Rosario
A2 Tecnologías del Medio Ambiente
K1 Biochemical methane potential
K1 Anaerobic digestion and co-digestion
K1 Sewage sludge
K1 Kinetic parameters
K1 Biogas production
AB Co-digestion of sewage sludge (SS) with other unusually treated residues has been reported as an efficient method to improve biomethane production. In this work, Sherry-wine distillery wastewater (SWDW) has been proposed as co-substrate in order to increase biomethane production and as a breakthrough solution in the management of both types of waste. In order to achieve this goal, differentSS:SW-DW mixtures were employed as substrates in Biomethane Potential (BMP) tests. The biodegradability and biomethane potential of each mixture was determined selecting the optimal co-substrateratio. Results showed that the addition of SW-DW as a co-substrate improves the anaerobic digestion ofSS in a proportionally way in terms of CODs and biomethane production The optimal co-substrates ratiowas 50:50 of SS:SW-DW obtaining %VSremoval ¼ 54.5%; YCH4 ¼ 225.1 L CH4/kgsv or 154 L CH4/kgCODt andmicrobial population of 5.5 times higher than sole SS. In this case, %VSremoval ¼ 48.1%; YCH4 ¼ 183 L CH4/kgsv or 135 L CH4/kgCODt. The modified Gompertz equation was used for the kinetic modelling of biogasproduction with successful fitting results (r2 ¼ 0.99). In this sense, at optimal conditions, the maximumproductivity reached at an infinite digestion time was (YMAXCH4 ) ¼ 229 ± 5.0 NL/kgSV; the specific constantwas K ¼ 25.0 ± 2.3 NL/kgSV$d and the lag phase time constant was (l) ¼ 2.49 ± 0.19
PB ELSEVIER
SN 0959-6526
YR 2020
FD 2020-04
LK http://hdl.handle.net/10498/22440
UL http://hdl.handle.net/10498/22440
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 07-nov-2026