Brewed on 28/6/2019
By Monash BrewLab
Brewers:
Scott Wordley
Binura Kulasinghe
Carson Yuan
Amy Cao
Khin Kyaw
Murray Rudman
Andrew Rodda
Yeast Starter:
2 x packets of WLP590 Yeast, both 150 days old.
Starter made with 2L and 206g DME for 24 hours, on stirplate at 21 deg.
Then split into 2 x 2L with same DME again added, both on stir plate.
Stir plates stopped 8 hours before pitching
Only a small amount of yeast observed settled to bottom, 5mm in 5L beaker.
Water:
4g of CaSO4 3g of CaCl2 3g of MgSO4
pH of water in kettle after these additions: 6.88
Mash:
Strike temp set to 69 deg C, for 57L and 12kg of malt at 21 deg for target mash in temp of 64 deg C.
Mash started at 9:40am
Mashing for 90 mins.
Iodine starch tests: after 60 mins all the starch is gone.
After 90 min mash gravity is 1.043
Sparge:
Wort temp 78 deg C.
Sparge water temp 80 deg C
15 L of sparge in 30 minutes.
First runnings were 1.044
Last runnings 1.026
Pre-Boil Wort gravity: 1.047
Estimated 80% brewhouse efficiency based on this gravity.
Boil:
100 deg C for 90 minutes
OG: 1.054 (Target 1.054)
Hops:
East Kent Goldings 4%, 80g @ 60 min
East Kent Goldings 4%, 20g @ 15 min
1 x Irish Moss tablet at 10 min
Chilling:
Pump left running during chilling
Start time: 2:34pm
Tap water at 18 deg passed directly to Braumeister cooling jacket until wort at 32 deg C.
Time taken: 3:08 = 32 mins
Tap water could not be passed through chiller coil in Ice block, as it was full of ice.
Cooled using tap water till 27 deg C and then splashed from BM tap into the fermenter.
Time taken: a few hours
Fermentation:
60L Fermenter, heat band and fridge
Started at 21 deg on Day 0: Friday 28/6/19 for 3 days.
Increased by 1 deg on Monday.
First OG read from Purple TILT = 1.053 compared to 1.054 OG from Refractometer.
Link to Tilt live data:
https://docs.google.com/a/student.monash.edu/spreadsheets/d/1TJVoVeQTfByHRMKIQcB8DqW5B82QF3FW_pNIsULmbws/edit