FOG and the River Brent through Perivale Park

In the course of our recent river clean-up opposite Brentside School, we experienced the full effects of FOG (fat, oil and grease) and understood something further about the role of dead vegetation in the river.  Two sets of waders and a kayak were coated in a white, almost impossible-to-remove grease after being in the thick of it both near and in one case, in, a raft of assorted dead vegetation jammed up behind a fallen tree.  The plastic litter we were after had accumulated on top of this raft and in order to access it, we had to break up the vegetation with rakes.  This is when we released the hitherto-hidden FOG lurking there.  So, the raft, which was between 2 foot and 5 foot in depth, was acting as a highly successful filter trap keeping the FOG in one manageable place.  The question now is how the FOG should best be extracted from such a trap so that the vegetation can continue to act as a trap without getting entirely clogged up?  Suggestions welcome! It also begs the question of how the FOG got into the river in the first place. Misconnections? The practice of pouring fat, oil and grease down the plughole in the kitchen sink, down the toilet and even directly into the river? How can we best educate/litigate to prevent these practices altogether? Again, all suggestions are welcome. One thing is sure: we need to stop FOG-tipping.

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