Testing of Commercial Defoamant to Control Anaerobic Digester ...
Testing of Commercial Defoamant to Control Anaerobic Digester ...
Testing of Commercial Defoamant to Control Anaerobic Digester ...
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<strong>Anaerobic</strong> Toxicity Assay (ATA)ATA tests were performedin serum bottlescontaining digestedsludgeDosed with essentialnutrients, acetatepropionate(substrate),and varyingconcentrations <strong>of</strong>defoamantInhibition <strong>of</strong> methanogenicbacteria measuredthrough <strong>to</strong>tal gasproductionGas Volume Measured ByDisplacement or PressureTransducerMethane ContentMeasured via GCNutrient SolutionWith rbCOD added(ATA test only)<strong>Anaerobic</strong> SludgeSample (Inoculum)Butyl Rubber septa withaluminum crimp <strong>to</strong>p sealHead SpaceFroth <strong>Control</strong>AddititveTypical Serum Bottle Assay (250 ml working Volume)