Kinetic investigations of methane co-fermentation of sewage sludge and organic fraction of municipal solid wastes.
In the presented study the co-fermentation, fermentation of sewage sludge (SS) and fermentation of organic fraction of municipal solid waste (OFMSW) were compared. The goal of experiments was determination of the processes carbon balance and proposal of the simple kinetic model of anaerobic digestion. Three batch experiments with above mentioned feedstocks were conducted in large scale laboratory reactor of working volume of 40 dm(3). The cumulative biogas production for sewage sludge (180.59 dm(3)) was lower than that for co-fermentation (232 dm(3)) or OFMSW (228.34 dm(3)). During fermentation of the OFMSW an accumulation of volatile fatty acids (VFA) caused pH decrease and strongly inhibited gas production. The addition of co-substrate improved buffering capacity of fermentation broth. The suggested mathematical descriptions of carbon division in anaerobic digestion processes gave the satisfying conformity with the experimental values.
Sosnowski
Piotr
P
Department of Bioprocess Engineering, Technical University of Lodz, Wolczanska 213, 93-005 Lodz, Poland.
Klepacz-Smolka
Anna
A
Kaczorek
Katarzyna
K
Ledakowicz
Stanislaw
S
D000693:Anaerobiosis; D000821:Animal Feed; D000818:Animals; D002244:Carbon / Q000032:analysis; D005285:Fermentation; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008697:Methane / Q000032:analysis*; D009930:Organic Chemicals / Q000737:chemistry; D011044:Poland; D012037:Refuse Disposal / Q000379:methods*; D012722:Sewage / Q000737:chemistry*
D009930:Organic Chemicals; D012722:Sewage; D002244:Carbon; D008697:Methane