Joseph,   I think this is the best explanation given as to why a Lamella style clarifier is not utilized in biological treatment units. I have personally seen a lamella clarifier clog with debris and biological growth on an INFLUENT water stream that did not dose bleach into the raw river water it was treating. The spaces between the plates and tubes are perfect environments for bacteria to attach and grow even without mixed liquor flowing through them. You add that to the mix and the plates will plug so rapidly that I do not know if you will ever get proper flow through them

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Joseph,

 

I think this is the best explanation given as to why a Lamella style clarifier is not utilized in biological treatment units. I have personally seen a lamella clarifier clog with debris and biological growth on an INFLUENT water stream that did not dose bleach into the raw river water it was treating. The spaces between the plates and tubes are perfect environments for bacteria to attach and grow even without mixed liquor flowing through them. You add that to the mix and the plates will plug so rapidly that I do not know if you will ever get proper flow through them