Homebrew Tips from the Masters#3: Sanitation

The third installment of homebrewing tips, which I bugged some Canadian brewers to dish out, covers sanitation. Brewing is basically the art of selective neglect. Your wort is a rich environment for any number of cultures to feed upon. But tasty beer can only be made by allowing a fairly narrow spectrum of yeast strains — or a handful of bacteria, in the case of some wild or sour beers — to ferment your wort. If you're not careful, undesirable cultures will infiltrate and utterly corrupt what you are trying to achieve. In a nutshell: your wort is Iran, and if you allow a single mullet to gain entry, the whole place will explode into a decadent cesspool of repulsive culture.

Sanitation refers not only to keeping your brewing equipment a. clean (as in, free of dirt) and b. sterile (free from bacteria or unwanted yeasts), but also to controlling the whole environment in which you brew. You might think you're a clean-freak, but your dwelling place harbours countless organisms that are easily transferred to your homebrew if you don't handle everything carefully. Prior to boiling, your wort may also contain unwelcome bugs, so you're up against it from the start. Here are a few tips from Canadian brewmasters for keeping on top of things.

Protect yourself from unwanted cultures

Sanitation
All of the brewers advocate stringent cleaning procedures. Your kit must be rigorously scrubbed and free of any dirt of particles before you can even start thinking about sanitizing it. This means that you must be vigilant about the condition of your equipment. If any cracks, fissures, nooks, or other recessed areas develop in your carboys, tubes, airlocks, etc etc, they must be replaced immediately. Bacteria is remarkably resistant when it has a place to hide.

Jason Meyer (Driftwood):

Keep it clean, or you’re wasting your time. Iodophore is a pretty good sanitizer, but you need to ensure the equipment is scrupulously clean before you can sanitize it.

Sanitation itself usually involves the use of certain chemicals that eradicate bugs without leaving tough-to-remove residues that can also make your beer taste like crap. All forms of home-fermenting (including wine and cider making) will need a sanitizing agent for best products, but some chemicals are better suited to beer-making than others:

Steve Cavan (Paddock Wood):

sanitize!!!  Do not use metabisulphate. It is fine for wine, but disaster waiting for  beer. Iodophor is a start, but really Star San is the only one that I would consider.  We have stuff mixed in the brewery which we give away to homebrewers.

Choice of containers is important too. Second-hand carboys are cheap, but make sure you know that they were only used for brewing beer, and not wine-making or penny collections, prior to purchase.

Terry Schoffer (Cannery):

If you have a love for wine that’s great, but remember, your beer doesn’t! Beer should never be brewed in the same containers as wine has been made in. Small cracks can harbor Lactobacillus, which will totally destroy all your hard work making that perfect brew. 

Again, if you are unsure how to properly sanitize your kit, call your local brewer. They will tell you what to use, where to get it, and if they are as saintly as this lot claim to be — they might even hand you some for free. Remember, cleanliness is next to hopliness.

Homebrew Tips from the Masters#2: Yeast

In the second in a series of posts containing homebrew advice I solicited from Canadian brewmasters, we look at yeast. Yeast is the fermenting agent that turns sugars into alcohol and sculpts the flavour of the beer.  It is also a living organism that must be stored, fed and used correctly. Brewmasters tend to get obsessive about it.

Yeast
Yeast is available in dry or liquid forms. Most professional brewers will use liquid yeast, and usually cultivate and store the same strains for use over and over again. The yeast that falls to the bottom of the fermenter once its work is done (flocculation) is not "spent", but merely dormant, awaiting a fresh meal of wort sugars that will restart the fermentation process.

To keep yeast viable for future use, brewers can store it under beer or water (which is becoming more common), although its potency will drop off over time unless the brewer is skilled and resourceful. Because it is such a picky creature to keep happy and potent, Jason Meyer of Driftwood Brewery advises "use pure culture liquid yeast only, and pitch lots of it!" Dry strains of yeast may be stored for much longer, but the results are not held in as high regard:

Steve Cavan (Paddock Wood): 

Liquid yeast. Yeast can account for 40% of the flavour compounds. Pick the right yeast for the style. (in the last 15 years, dry yeast has come a long way, although there is still limited variety)

Terry Schoffer (Cannery Brewing):

For increased flavor and body always use liquid yeast. Most micro brewery’s will welcome home brewers and give them yeast and sometimes tips for free. Show your appreciation and bring them a sample of your home brew or buy something from their gift shop.

For those who must or want to use dry yeast, Terry Schoffer flags the importance of rehydrating the yeast properly before use, "make sure you re-hydrate it by heating 1 cup of water to 40C, adding your dry yeast and letting it stand for fifteen minutes before pitching. This will promote healthy yeast growth and keep the nasty bacteria count down. Never use wort to hydrate your yeast."

Dry yeast can produce decent results. However, BA member Homebrew42 warns us about homebrew kits that come with packets of "generic 'ale yeast' that is typically of low quality. You're never going to brew a fantastic English bitter with an old, stale packet of characterless 'ale yeast'."

Overall, the message seems to be if you take the time to understand what yeast is and how it works, and get in touch with local beer makers who are experienced in handling yeast, your beer will turn out better. And you might even score some free yeast in the process.