A respirometric method for characterising the organic composition and biodegradation kinetics and the temperature influence on the biodegradation kinetics, for a mixture of sludge and bulking agent to be co-composted.
A respirometric method was set up to study kinetics of biological reactions involved in the treatment of organic wastes-sludge mixed with pine barks--by composting. Oxygen consumption rates of this type of mixture were monitored during 10-20 days, using a 10 l respirometric cell kept at constant temperature and moisture. Oxygen consumption kinetics were modelled and organic matter composition was characterised as biomass, easily-biodegradable, slowly-biodegradable and non-biodegradable organic matter. The influence of temperature on kinetics was tested. Results show that this respirometric method is a useful tool for the characterisation of solid organic matter biodegradability and for the modelling of the biological kinetics of the composting process.
Tremier
A
A
SUEZ Environment, Organic Effluents Division, CIRSEE, 38 avenue du Président, Wilson 78230 Le Pecq, France. anne.tremier@cemagref.fr
De Guardia
A
A
Massiani
C
C
Paul
E
E
Martel
J L
JL
D001673:Biodegradation, Environmental; D018533:Biomass; D002623:Chemistry Techniques, Analytical / Q000379:methods*; D004784:Environmental Monitoring / Q000379:methods*; D006868:Hydrolysis; D007700:Kinetics; D008962:Models, Theoretical; D009930:Organic Chemicals / Q000032:analysis / Q000737:chemistry; D010100:Oxygen / Q000378:metabolism; D015203:Reproducibility of Results; D012722:Sewage / Q000032:analysis* / Q000737:chemistry; D012987:Soil; D013696:Temperature; D018505:Waste Management / Q000379:methods*; D014934:Wood
D009930:Organic Chemicals; D012722:Sewage; D012987:Soil; D010100:Oxygen