What do with dirty diesel

[Royk]

I keep off-road diesel in two blue plastic 55 gallon drums in my garage for my tractor. Every year or two, I put the barrels in the bed of the PU and go to a distributer to fill them up. I use a hand crank pump in the bung attached to a plastic hose to get the fuel out

A few months ago the tractor stalled. The filter was filthy so I replaced it, bled the lines and topped off the tank. Tractor ran good for about a day and it happened again! I suspected water and sure enough, when I opened the petcock, quite a bit flowed out before the red stuff.

I went back to the garage and pumped some into a clear bottle and it was filthy (but now water), so I lifted the pump siphon tube off the bottom so I was sucking clean fuel.

I drained the tractor tank and replaced it with fresh. Worked well the rest of the time.

Well I'm sucking air now and had to drop back down to the bottom. What do I do with all the remaining dirty diesel in the bottom of the barrel, as well as the
8 gallons I drained from the tractor? At $4.75 or so, I want to put it to better use than using it as herbicide!

Also, I'd like to get one of those big tanks people use for home heating fuel. This way they would deliver it and it would actually be cheaper per gallon. Any thoughts on where to get one and how to set it up?

Roy