Monitoring of Anaerobic Degradation in Batch Assays Using Fiber Bags

The anaerobic batch digestion of freeze-dried and ground (< 1.5 mm) maize silage, wheat straw, cattle manure, pig cellulose filter paper was investigated with substrates placed in polyester bags. Gas production dynamics bagged non-bagged were compared. By using bottles running parallel those used for gas measurement, could be sampled over time various parameters measured both substrate bulk liquid. bags allowed an immediate mass loss into the liquid some a generally lower rate production. This method requires refinement but has potential study degradation during digestion.