I wish you all the best.  My ...

I wish you all the best.  My experience of SBR is that it can be difficult.  I have seen to SBR tanks working side by side with the same feed.  One suffered from severe filamentous growth while the other didn't.  There are various things you can use but they may not work.  You could try chlorination starting at a low concentration and increase the strength slowly.  This can break up the filaments.  There are freeze-dried bacteria available, which can outgrow the filamentous bacteria.  The question is why have the filamentous bacteria developed.  My experience is with industrial and food wastes, so I am able to identify the source of the problem and produce a solution but with sewage, you may not the cause.  There are two main references on filamentous growth and control.  The first is Eikelboom and the second is RIchards.  I am afraid that the solution may not be easy.