Testing of Commercial Defoamant to Control Anaerobic Digester ...

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Operational ProblemsExcess froth in anaerobic digesters can result in operationalproblems: An inverse solids profile insufficient stabilization Reduced digestion capacity andperformance Damage to digester equipment Health and safety issues Significant clean-up costs
Chemical DefoamantsDefoamants alter the physio-chemical properties of foamby reducing the surface tension of the foam This action dissipates the foam on the gas bubbles that arestabilized by filamentous microorganismsCommercial defoamants can be very effective atreducing foam in activated-sludge aeration tanks:Prior to Defoamant Addition During Defoamant Addition Day After Defoamant Addition
Page 5: Filamentous Microorganisms How do t
Page 9 and 10: Surface Tension TestingThe ability
Page 11 and 12: Toxicity Testing Methanogenic bacte
Page 13 and 14: ATA on FC Rel ® DefoamantFC Rel De
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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