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In-line Mixer after aeration for WWTP

In-line Mixer after aeration for WWTP

In-line Mixer after aeration for WWTP

(OP)
Hi All,
With new regulations, we have to decrease the floride concentration in the wastewater before giving recieving river. We will use ferric chloride to react with floride and we will have 2 solid products. We think to feed ferric chloride after aeration tank going to detention tank to settle. But we need a connector to the sludge pipeline(which has 35% solid and 65% water in it) for ferric chloride which will provide a uniform    mixing of sludge water and ferric chloride. We dont want anything in pipeline that is why we cant have static in-line mixers, also not quills because we dont want pipeline to clog  after a while. Do you know any equipment which will provide this kind of connection or how we can make enough turbulance  at that connecting point to set a uniform mixing.
Thanks.  

RE: In-line Mixer after aeration for WWTP

You should have the solution adequately mixed if you allow 4 90 degree bends after you inject the chemical feed.

RE: In-line Mixer after aeration for WWTP

(OP)
do you have any scientific explanation or source that I can look it up why it is like that? becasue I have to explain it to my supervisor...we kind have pressure issues too but I am sure if we find a efficient way to mix them then we can solve it...

RE: In-line Mixer after aeration for WWTP

(OP)
any more ideas for mixing? any scientific explanation for 4 90 degree bends?

RE: In-line Mixer after aeration for WWTP

Don't have any documentation for the 4 90 degree elbow method. The method was told to me by a senior project engineer for a water treatment company many years ago. However, it would be simple to test the method with a dye solution.

RE: In-line Mixer after aeration for WWTP

There are non-clog static mixers that will pass debris up to 25% the diameter of the pipe.  They are used for sludge/polymer mixing.  I know that Komax Systems makes one called a Hi-Pass.  It was successful on our dewatering application.  

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