Ok so here are some notes from the meeting last night.
- Slurp and burp entries due April 1st and judging will take place April 8th and 9th. The website is listed below. http://strangebrew.org/slurp/
- Tom will be teaching a Homebrew class on March 5th for beginners at the Gresham public library, speak with Tom about the details.
- March meeting will be about Yeast propagation and pitching levels. I've been wanting to build a stir plate for awhile so I'll bring that and do a yeast starter demonstration. Someone had asked a question about yeast harvesting, so if anyone knows how to properly do it and wants to talk about it that would be great.
Sure, homebrewers make the wort, but it’s yeast that makes the beer. The process of converting wort into beer is a labor-intensive task for yeast, and it deserves all the help it can get to conduct a quick but clean fermentation. One of the best ways to ensure yeast is empowered for the best fermentation is by creating a yeast starter.
When To Make a Yeast Starter
A standard package of liquid yeast typically contains about 100 billion viable yeast cells. Sounds like a lot, right? Well, that’s actually only enough yeast for a 5-gallon batch of 1.048 original gravity homebrew. As volumes, gravity or both increase, more yeast is needed. On top of that, the number of viable yeast cells in a package decreases overtime.
So, if you are planning on brewing larger volumes, higher gravities or using older yeast packets, it’s wise to pursue a yeast starter to ensure you have enough healthy brewer’s yeast to get conduct quality fermentation.
Dry yeast doesn’t need a starter. Simply take the appropriate steps to rehydrate dry yeast prior to pitching.
Equipment Needed for Yeast Starter
When making a yeast starter, you’re essentially boiling and fermenting a mini batch of beer. First you’ll need a vessel large enough to hold the volume of the starter and something to cover the top, like foil or a stopper. The vessel can simply be a jar or plastic bottle, but Erlenmeyer flasks that can withstand direct heat are a popular choice since the entire boiling and fermentation process can be done in one vessel. If not using a flask, you’ll need a pot to boil a small quantity of wort. Other than that, you’ll need some water, dry malt extract and sanitizer.
A stir plate, which can easily be made at home, is highly recommended to continually add oxygen to the starter, which is crucial in growing the yeast cell population in a starter. If a stirplate is not available, simply giving the vessel a shake every now and again is better than not adding oxygen at all.
Establishing Ideal Yeast Cell Count
It is important to have a target number of viable yeast cells when formulating a starter. This is determined by the beer batch’s volume in relation to the original gravity. Generally speaking, an ale requires 0.75 million viable yeast cells for every milliliter of wort per every degree plato, while lagers require 1.5 million viable yeast cells for every milliliter of wort per degree plato. So, for example, a 5-gallon batch of 1.064 ale wort would require about 227 billion viable yeast cells:
(0.75 million viable yeast cells) x (18925 mL of wort) x (16° Plato) = ~227 billion yeast cells
Determining Gravity, Temperature & Volume for a Starter
Gravity: Aim to have the gravity in the 1.030-1.040 range, which will promote healthy growth without introducing too much unneeded stress. Temperature: In general, aim to keep yeast starters around 72°F (22°C), with ales being able to be a few degrees warmer and lagers a few degrees cooler. Volume: Determining volume can be a very involved process. The volume of the starter in relation to the number of viable yeast cells added, termed the inoculation rate, will determine the growth potential for the yeast starter.
For example, 200 billion yeast cells added to a 2 liter starter will have significantly less overall growth than adding 100 billion yeast cells to the same volume. There are charts, like the one in Yeast: A Practical Guide to Beer Fermentation, that can help make informed decisions. However, you may prefer to use a program like the Mr. Malty Pitch Rate Calculator, which not only helps determine volume, but also the target number of yeast cells based on your beer’s volume and original gravity.
The Steps to Make a Yeast Starter
Now, all that’s left is to actually make the starter! The following are general instructions that can be applied to all sizes of starter:
Determine the appropriate starter volume to achieve the target number of viable yeast cells for your beer. Remember, you can use an online yeast calculator like the one linked above to quickly determine these variables.
Weigh out 1 gram of dry malt extract for every 10 milliliters of target starter volume.
Add the dry malt extract to the vessel you will be boiling in.
Add enough water to the boil vessel (dry malt already added) to reach the target starter volume.
Add about 1/4 teaspoon of yeast nutrient to the boil vessel. You can use slight less for starters under 1-2 L and slightly more for ones larger.
Bring to a gentle boil for about 15 minutes. Keep the boil vessel covered to maintain as much of the volume as possible.
After 15 minutes, allow the wort to cool.
If needed, transfer the liquid to the vessel that will hold the starter. (Note: As with beer, anything that comes into contact with the starter wort post-boil should be properly clean and sanitized).
Pitch yeast into the chilled starter wort.
Use a stir plate or intermittent shaking to add vital oxygen to the starter.
Pitch into beer once ready!
How to Pitch a Yeast Starter
Starters are typically either pitched during high krausen or after active fermentation has subsided.
Pitching at high krausen, or at the height of the fermentation’s activity, which typically is 12-18 hours after pitching the yeast into the starter is the most convenient method. Simply pitch the entire contents of the starter into the wort of your homebrew once it’s ready.
Be sure the temperature is within 5-15°F of the wort’s temperature when using this method. If it’s too hot or too cold, it can shock the yeast and ultimately create problem fermentations.
Warm starters or starters with volumes more than 5% of the main batch volume need additional preparation. First, allow the fermentation to basically complete and then chill the starter by placing it in the fridge until it is near the temperature of the wort it is intended for. Decant the liquid and pitch only the yeast cake.
That’s it! You just pitched the perfect amount of yeast in your homebrew. Sources: Yeast: A Practical Guide to Fermentation by Chris White & Jamil Zainasheff; How to Brew by John Palmer; http://www.homebrewersassociation.org/how-to-brew/make-yeast-starter/
In 1988, May 7 was announced before Congress as National Homebrew Day. The American Homebrewers Association (AHA) created AHA Big Brew as an annual event to celebrate National Homebrew Day around the world. AHA Big Brew is held each year on the first Saturday in May.
Anyone, even homebrew shops, can host and register a Big Brew event, so invite your friends and family, gather around the brew kettle and join in the global celebration of the greatest hobby there is—homebrewing!
Everyone here are the competition results.
1st - Wee Heavy (Strong Scotch Ale) by Tom Bowden 2nd - Wee Heavy (Strong Scotch Ale) by Doug Cutshall 3rd - Imperial Stout by Nicholas Engels... 4th - American Barleywine by Nicholas Engels 5th - Belgian Dark Strong by Tom Bowden 6th - "Creme Brulee" Imperial milk stout with Bourbon-soaked vanilla beans, by Connie Sams 7th - Imperial IPA by Jeff Norris
The BJCP judges thought all of the entries were very good. Hopefully the feed back that they gave you helps.
Again thanks to all those who entered. I will be talking with Steve to see when we can do another competition.
Everyone the last meeting was great. Tracy from the Green Dragon came out and went over sensory analysis when tasting and judging a beer. She also talked a little to us about the Green Dragon Brew Crew and how they like to work with homebrew clubs and will occasionally invite a club member out to brew on their nano system. Well we have been invited and must nominate someone within the club to go and brew a beer with the Green Dragon Brew Crew. I was contacted by Warren Johnson and here is his email.
Hi Michael.
I understand that Tracy Hensley recently visited your club and mentioned the Green Dragon Brewing Program. The Green Dragon Brew Crew periodically invites guest homebrewers to brew their own recipes on our 1 bbl nano system at the Green Dragon. The guest brews are then released for sale at the pub when ready.
The Green Dragon Brew Crew would like to invite another guest brewer and we'd love to get a guest nomination from the Gresham Mashers Homebrew Club. We're looking for someone who has shown dedication to your club and, of course, to the craft of homebrewing; whether it's by winning a competition or for exceptional service to the club. We especially love to work with passionate brewers that are eager to learn and share their brewing experience.
If the Gresham Mashers would like to nominate one of its members for a brew day at the Green Dragon, please send me the name and contact information of your nominee along with the reason for your nomination. I will then contact them and extend an invitation to join us as a guest brewer.
We really appreciate your time and look forward to working with your club soon. Thanks much.
Cheers!
Warren
Green Dragon Brew Crew
So we need to nominate someone. I say lets keep nominations open for a week and then we will vote next week.
