So I tried BIAB yesterday and had some mixed results. I decided to use my 7.5 gallon brew pot with a 15 lb grain bill. I wanted to use my kitchen stove since it was raining outside and I wouldn't need all the equipment I normally do since I was going for BIAB with no sparge. I got great performance out of my kitchen stove - it brought everything up to temp much faster than I expected.
12:15 put 6.5 gallons of spring / bottled water and ph5.2 in pot and turned on stove. - Water was 60*. I then put in upside down strainer to keep grainbag off the bottom of the pan.
12:35 water was at 105* I doughed in with everything but the pound of sugar. I then stirred regularly. It seem to take a while so I left the stove to check on some stuff and returned 20 minutes later to find the thermometer at 170. I turned off the gas and stirred some more and took the lid off. It took about 20 minutes to get it down in the mid 150s. I let it sit and mash with the lid off for another 75 minutes.
2:15 - pulled the grain bag out and put it in a colander over an ale pail to drain. Pressed down on it with a plate to squeeze out the last drops I could.
While grain bag was draining I checked out the pot with he wort in it and pulled out the upside down metal colander using the chain I attached to it. The wort was super cloudy and had a chunks of stuff in it. I decided it was too cloudy so I poured the stuff from the bucket into the pot and then rinsed the bucket and added a 5 gallon paint strainer.
I drained the pot into the bag/bucket and ended up with about a softball size load of schmutz that I don't know how it made it through the grain bag. I then gave the pot a quick scrub to get a lot of the residue off the sides and poured the bucket back in the pot and turned on the gas.
I added 12 drops of ferm cap (first time using this) to preven boil overs (since it was on my kitchen stove. The rest of the 90 minute boil went pretty normally but I had a lot of trub - perhaps a gallon or more after chilling. I usually don't have half that much.
So what did I do to get such horrible efficiency? Was it the mash temp overshoot?
I decided to try BIAB since I have gotten hit and miss efficiency with my cooler MLT but if this is what I can expect, I think I'll stick with the cooler.
12:15 put 6.5 gallons of spring / bottled water and ph5.2 in pot and turned on stove. - Water was 60*. I then put in upside down strainer to keep grainbag off the bottom of the pan.
12:35 water was at 105* I doughed in with everything but the pound of sugar. I then stirred regularly. It seem to take a while so I left the stove to check on some stuff and returned 20 minutes later to find the thermometer at 170. I turned off the gas and stirred some more and took the lid off. It took about 20 minutes to get it down in the mid 150s. I let it sit and mash with the lid off for another 75 minutes.
2:15 - pulled the grain bag out and put it in a colander over an ale pail to drain. Pressed down on it with a plate to squeeze out the last drops I could.
While grain bag was draining I checked out the pot with he wort in it and pulled out the upside down metal colander using the chain I attached to it. The wort was super cloudy and had a chunks of stuff in it. I decided it was too cloudy so I poured the stuff from the bucket into the pot and then rinsed the bucket and added a 5 gallon paint strainer.
I drained the pot into the bag/bucket and ended up with about a softball size load of schmutz that I don't know how it made it through the grain bag. I then gave the pot a quick scrub to get a lot of the residue off the sides and poured the bucket back in the pot and turned on the gas.
I added 12 drops of ferm cap (first time using this) to preven boil overs (since it was on my kitchen stove. The rest of the 90 minute boil went pretty normally but I had a lot of trub - perhaps a gallon or more after chilling. I usually don't have half that much.
So what did I do to get such horrible efficiency? Was it the mash temp overshoot?
I decided to try BIAB since I have gotten hit and miss efficiency with my cooler MLT but if this is what I can expect, I think I'll stick with the cooler.