Hi TB,
I think you're perfectly justified in defending the reputation and ability of the people you work with, and like you I agree that they do a miraculous job at producing a consistent product, regardless of what that product is (I'm talking about the Big volume stuff here).
So far there's been a lot of argument and rhetorical debate on this topic, however what is obviously missing is any REAL factual information about what actually MAKES this beer the way it is - this is what I believe the original topic was trying to explore!
There's plenty of speculation and opinions about hops/isohop, preservatives, adjuncts, sugars, etc. but what many of us would like to know is EXACTLY what they do to produce this type of beer. I'm not suggesting you lose your job by providing us with a photocopied recipe for VB (for want of an example), but I think a lot of myths would be debunked if you (or any others here that know THE FACTS) could enlighten us with what you know, under the relative anonymity of a public forum:
* Sugar
* Adjuncts and enzymes
* preservatives
* Mashing regime
* Fermentation temp and yeast strain(s) (that might get you into trouble!)
* Lagering duration/ temperature
* Blending
* Pre-packaging treatment (filtering, pasturisation, etc.)
Also, it's also been mentioned earlier that isohop is used in certain brews, though I'm not convinced this is as big a culprit as I once thought - please correct me if I'm wrong.
So, does anyone want to share what they actually know?
Hutch.
Only too happy to share - I need to be a little generic because the answers aren't the same across the spectrum of beers I help to make & because I really don't want to lose my job by giving away trade secrets.
I'm not sure if it will help though - there wont be any startling revelations and I imagine the information will both satisfy the curious and simultaneously confirm all the worst suspicions of those who knew it all along. But for what its worth, here are the things I know about brewing at a "mega" brewery
Malt - All out malt is from that evil purveyor of substandard product (joking guys no need for lawyers) Barret Burston. It is mostly a pale/lager malt designed for low maltiness & a higher level of dextrins per mash temp. Super low DMS pre-cursors. Every single truckload is visually inspected and comes with a full set of specifications so that mashing can be tailored to compensate for the grain being used
today. We also get in BB crystal and Black Barley for those beers that need them.
Adjuncts - There are no starch adjuncts used. Only sugar adjuncts. The sugar all comes in the form of syrups. We use a few different sorts, predominantly sucrose and maltose syrups. But there are also a few specially tailored syrups that are a combination of those two things and dextrins. The different syrups are used to tailor fermentability profiles. For the majority of the brews, the sugars would make up somewhere between 15 & 20% of the fermentables. At least one of the beers has a much higher proportion of sugar... but to balance that, we also make at least two no adjunct beers (ie All Grain) Bet you can't guess which ones are which.
Mashing - Beers are usually step mashed with an L:G of between 2.5 & 3. Temp controlled Mash Tun. Stand times are mostly quite a lot shorter than a homebrewer would use - but you have to remember that mashing in and transfer times take a while when you are talking about a 17,000kg grist. So they all add up. Then again, one of our beers has a 120min sach rest.... The temps overall are probably a lot higher than HB temps would be, but we are shooting for a much more dextrinous wort than a homebrewer would normally be looking for. Standard mash additions of Gypsum/Salt/Cal Chloride/Mag Sulphate etc are made as appropriate for the brew.
Lauter/sparge - Mash is transferred after a partial mashout (not high enough to stop enzyme activity, but enough to slow it down a lot) to a bloody great big lauter tun, where it is sparged over around 120mins. Continuous sparge, probably best described as a "flood" sparge rather than a "fly". We would be collecting around about 100,000L of wort from each batch mostly in the 13-18 plato range.
Boil/hopping - Boils are usually 60min and dependent on the brew either bittering or aroma hops might be added in pellet form. The bittering hops if they are added are POR and the aromas will be a Euro Noble hop. Even when bittering hops are added - they aren't the primary source of bittering. It will always be mostly ISO extract of one form or another. But where it is desirable to have an actual hop character to the beer, they are used. Aromas though... don't talk to me about the bastards..... pallets and pallets of pellets I have to lug around the place
. Of course during the whole process, in-line meters are monitoring every possible volume, temp, level, attribute of the wort etc etc that you could possibly think of, and probably more. Post boil samples are taken for among other things pH, tint (some brewers caramel is sometimes added to adjust colour) & of course gravity. Our spec for the gravity allows us a little leeway - we need to get it within .001 SG -we can add cut water if we are a little high, but too low means adjusting the next brew. It takes 2-5 brews to fill a fermentor, so the blending starts at wort production, this brew a little low, next one is made a little stronger. The fermentors will be accurate to the 4th decimal place of SG by the time we are done.
Whirlpool and Chill - aren't exciting, they are just a whirlpool vessel and a whacking great plate chiller
We run two brewhouses simultaneously and our wort production complex is able to produce 18-20 brews/24hrs at around 120,000L per brew. At the risk of making it absolutely clear to my employers who they should sack if they dont like this thread, the Wort Production Complex is where I spend my time, about as far away from being in charge of anything as its possible to get
Enzymes - Yep. Every brew gets a bit of a shot of a gluconase enzyme to help with lautering. About 1L in the 40,000+L of mash. It does its job and make things go faster. "other" enzymes are used to make low carb beers low carb, but not really for anything else.
Fermentation/Yeast - Yeasts are all either Proprietary strains that were mostly developed by the brewery over the last hundred years or so, came with the acquisition of a beer brand, or are the official yeast of a BUL beer. The strains for the local brews are have been cultured to perform quickly and cleanly at higher than normal "lager" brewing temps. All the major brands are lagers no matter what the label says. I wont do the actual temps thing - but suffice it to say, for lagers fermentations are hot and fast. Fermentation takes around a week starting out quite low and free rising to its maximum before being held there to finish, beers are then chilled back for a couple of days to allow the yeast to settle, then they are tapped off the fermentor, through centrifuges to get rid of almost all the yeast and put into cold storage for a week or three. I don't believe that we use a fining agent in the fermentors now that we have centrifuges - we used to use isinglass, but I dont think we do anymore. I will call a fermentation guy to check and update here if we do. Hop extract for bittering is added to the beer during transfer to the storage tanks.
Blending - Absolutely. The aim is to hit the quality targets into the bright beer tanks. So fermentors and storage tanks will be analyzed and tasted numerous times. High will be blended with low and visa versa, out of spec might be dribbled into batches that have room to move etc etc. Brands aren't mixed, but for instance an export version might get downgraded if it cant be made to hit its (much tighter) specs. If beer is unblendably out of spec... it goes down the drain. Takes a couple of days to pour nearly a million litres of beer down the sink, I've watched it happen.
Preservatives/process aides etc - Some. The only actual preservatives that I have seen put into beer are some Ascorbic Acid and some Sodium Metabisulphite - there might I suppose be others, but not that I am aware of. In some beers anti haze enzymes are added. Mainly the ones that are going overseas on a boat, the physical rocking back and forwards on the boat causes a haze to occur in the bottle. Pre-filtering PVPP or Silica Gel is added to control chill haze, I am pretty sure its used for all beers these days. Those are filtered out again of course so they are process aides rather than ingredients.
Filtering - is done via diatomaceous earth filters (candle) which take out yeast and the PVPP or Silica gel. Carbonation and dilution to sale strength happens during the transfer/filter process from Storage to Bright tanks. Final adjustment dosing of hop extract and caramel happens just prior to the filter. This is adjusted during the filter run so that the final bright tank levels are to spec. Bright beers are monitored for carbonation etc and stored at around -1C till they are required by packaging.
Packaging - Cans and bottles are filled on fancy arsed Krones steam strerilizing fillers, and all but the beers labelled "cold filtered" are pasturised in tunnel pasturisers. The cold filtered ones are sterile filtered instead. Beers for kegging are flash pasturised on the way to the kegging plant.
And thats it .... so in there is all the merit and all the bad you care to find. If you think the beers are great, thats why - if you think they are fine examples of beers you don't really care for, thats why - if you think they are crap.... then in there somewhere is the reason why.
You can figure out which bits you think are "responsible" - but it wont be any single one of them - it will still end up being the fact that the beers are carefully and deliberately brewed to taste the way they do, and you just don't like it. The exact same process could be used to brew a beer you love, it just isn't thats all.
At least now you'll know rather than just suspect. At the risk of perpetuating an already overly long thread... I'll answer specific questions (if I can) if people want me to.
Had my favourite beer tonight - Reissdorf Kolsch - compared to that stuff, nearly everything is crap
Thirsty