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WEF Discussion Forums » Biosolids and Residuals » DAFs, Polymer, Coagulant & YOU

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DAFs, Polymer, Coagulant & YOU
Jay White
Posted: Monday, June 4, 2012 2:35 PM
Joined: 10/21/2009
Posts: 2

Hi,

I work in industrial pretreatment.  We have a UASB anaerobic digestor as our primary treatment and an activated sludge system downstream as secondary polishing treatment.  We are installing a DAF inbetween our equalization and acidification tanks for the purpose of solids removal prior to the UASB.  We are having trouble planning and designing a dosing system without knowing much (anything) about polymer needs or the possible need for a coagulant.  Anyone know any good resources for this?

Thanks a lot,

Jay
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Handsome Dan
Posted: Monday, June 25, 2012 1:25 PM
Joined: 6/25/2012
Posts: 4


 We dose our DAF's with a diaphram pump out of a holding tank.  We use dry polymer, and mix it with a stranco unit.  We use our polymer at a concentration of 0.2% but im sure it will be different in your application.  Do lots of jar testing.
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