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Weed Seed Survival in a Dairy Manure Anaerobic Digester
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1984
Year
EngineeringBioenergyIn Vitro FermentationFood FermentationSeed ViabilityAgricultural WasteAgricultural EconomicsWeed Seed SurvivalMicrobial EcologyAnaerobic DigestionFall Panicum SeedsMicrobiologyAbstract Dairy WasteSeed ProcessingHealth Sciences
ABSTRACT DAIRY waste containing Johnsongrass and Fall Panicum seeds was subjected to batch and continuously-fed anaerobic fermentation processes in laboratory-scale digesters. The effect of influent solids concentration (4% and 6%) and retention time (15 and 20 days) on seed viability was observed in the mesophilic temperature range [35 C 1 C]. Fall Panicum seeds were found to be less resistant to anaerobic digestion than Johnsongrass seeds. Greater seed destruction was achieved in 20-day than in 15-day digesters. Anaerobic fermentation was more effective in destroying non-dormant than dormant seeds. Influent solids concentrations did not have significant effect on seed viability.