Testing of Commercial Defoamant to Control Anaerobic Digester ...

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Application Guidelines (general)Digester Dosage is typically 5 ppm (based on Digester Volume) Higher initial dose to get concentration up in digester. Recommended continuous feeding during periods of problematicfoaming Feed Point: Recirculation loop (optimal), also Sump wells (post-clarification) Digester sampling ports Sludge feed Need to ensure adequate mixingAeration Tank Ideal if defoamant can be sprayedon to surface of foam (i.e. ESDs)
Surface Tension TestingThe ability of a liquid to froth isrelated to its surface tensionSurface tension measurementstaken on FC Rel defoamant withDI water, MLSS, and digestedsludge using a CSC DuNouoyTensiometerCSC DuNouoy Precision Tensiometer
Page 5 and 6: Filamentous Microorganisms How do t
Page 7: Chemical DefoamantsDefoamants alter
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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