Testing of Commercial Defoamant to Control Anaerobic Digester ...

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Anaerobic Toxicity Assay (ATA)ATA tests were performedin serum bottlescontaining digestedsludgeDosed with essentialnutrients, acetatepropionate(substrate),and varyingconcentrations ofdefoamantInhibition of methanogenicbacteria measuredthrough total gasproductionGas Volume Measured ByDisplacement or PressureTransducerMethane ContentMeasured via GCNutrient SolutionWith rbCOD added(ATA test only)Anaerobic SludgeSample (Inoculum)Butyl Rubber septa withaluminum crimp top sealHead SpaceFroth ControlAddititveTypical Serum Bottle Assay (250 ml working Volume)
ATA on FC Rel ® DefoamantFC Rel Defoamant Concentrations: 0-500 mg/LTotal GasProductionFC Rel defoamant was not found to be toxicGas Production RatesSerum bottle with highest dose performed best in terms of total gasproduced and gas production rate
Page 5 and 6: Filamentous Microorganisms How do t
Page 7 and 8: Chemical DefoamantsDefoamants alter
Page 9 and 10: Surface Tension TestingThe ability
Page 11: Toxicity Testing Methanogenic bacte
Page 15 and 16: Microtox Test on FC Rel DefoamantEC
Page 17 and 18: Frothing Potential TestsA visual in
Page 19 and 20: Defoamant TestingTest SetupDefoaman
Page 21 and 22: Dosing TestsFC Rel Defoamant Dosing
Page 23 and 24: Full-Scale Testing - Round 1 August
Page 25 and 26: Testing Setup
Page 27 and 28: Results - Round 1Prior to defoamant
Page 29 and 30: Full-Scale Testing - Round 2 Initia
Page 31 and 32: HP Full-Scale Defoamant Addition
Page 33 and 34: Defoamant Dose Test
Page 35 and 36: Conclusions and Recommendations Def

Testing of Commercial Defoamant to Control Anaerobic Digester ...

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