using biochar quench water

Anybody use the quench water for anything - base for compost tea, water plants, water compost, etc.?

All of the above. Some of it gets bucketed onto the compost heaps, but most gets drained onto the paddock. We have acidic soils here so the high pH is a bonus for watering, but I dilute it about 25% so that roots don't get a shock.

If I'm making another batch soon, quench more biochar.

I quench it twice: Once to put out the fire, and a second time when I put it in a ceramic tub to cool it off.  I don't want it to smolder for weeks.  The first, fire quenching water just drains off.  With the second, ceramic tub water, I pour it off onto alkaline-tolerating plants before crushing the biochar.  

John S
PDX OR

I pour it on my nasty clay to make it look like rich, black soil. Fake it til you make it.

I stole my quench water from the chicken's rainbarrel.
I was tempted to put it back in, but that could be bad for the chooks.

I should use it to establish a compost tea barrel, but I'll probably just pour it into the greywater filter.

Yeah, it's tricky. Depends on the general pH trend of your soil. Some plants will put up with the high alkaline to get the phosphorous though. Raspberries, in my experience.

Hmm, I happen to have quite a few raspberry plants.
Im also starting a new raised bed of blackberry canes, right where the greywater discharges.

I, unfortunately, don't have a way to collect the quench water from my biochar production. This past time I had quite a bit of ash buildup that I did my best to wash away from the char. I imagine the quench water was mixed with plenty of ash and would be on the basic side of the PH scale.

I wonder if it would be appropriate to utilize the water in places where you wanted the benefits of 'remineralizing' as ash is leftover mineral material if I understand correctly?