Science of Brewing

sumerian-tablet
Peter Damerow, from the Max Planck Institute for the History of Science, in Berlin, has published online a lengthy paper about the origins of Sumerian brewing. Entitled Sumerian Beer: The Origins of Brewing Technology in Ancient Mesopotamia, it’s part of The Cuneiform Digital Library Initiative (CDLI). The opening sentence gives a flavor of its purpose. “The following paper is concerned with the technology of brewing beer in the Sumerian culture of ancient Mesopotamia, which we know about from cuneiform texts of the 3rd millennium BC. and from reminiscences in later scribal traditions which preserved the Sumerian language and literature.”

It’s broken down in to seven sections:

  1. Introduction
  2. Overview of the sources
  3. Beer types and ingredients in proto-cuneiform documents
  4. Beer types and ingredients in the Old Sumerian period
  5. Beer types and ingredients in the neo-Sumerian period
  6. The brewing of beer
  7. What kind of beer did the Sumerians brew?

Sumerian-beer
Fig. 1: Impression of a Sumerian cylinder seal from the Early Dynastic IIIa period (ca. 2600 BC; see Woolley 1934, pl. 200, no. 102 [BM 121545]). Persons drinking beer are depicted in the upper row. The habit of drinking beer together from a large vessel using long stalks went out of fashion after the decline of Sumerian culture in the 2nd millennium BC.

I confess I haven’t read the whole thing yet, but I did download the pdf of it so I can put it on my iPad. Still, just from skimming it appears fairly interesting, and a worthy piece to read over the holidays.

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big-brewers
Our 56th Session is a nod of the head, acknowledging the positive aspects of the big, multinational brewers that we so often admonish and criticize. Our host, Reuben Gray at Tale of the Ale, calls his topic Thanks to the Big Boys, which he describes as follows:

What I’m looking for is this. Most of us that write about beer do so with the small independent brewery in mind. Often it is along the lines of Micro brew = Good and Macro brew, anything brewed by the large multinationals is evil and should be destroyed. Well I don’t agree with that, though there may be some that are a little evil….

Anyway I want people to pick a large brewery or corporation that owns a lot of breweries. There are many to chose from. Give thanks to them for something they have done. Maybe they produce a beer you do actually like. Maybe they do great things for the cause of beer in general even if their beer is bland and tasteless but enjoyed by millions every day.

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While I don’t necessarily like most of the products made by the remaining larger brewers, what they do make is incredibly difficult to brew consistently. They have perfected the science side of brewing, however in doing so I believe they have lost a lot of the artistic side of the equation. To me the best beers contain an equal mix of both the brewer’s art and science. Craft brewers are the modern alchemists, turning base materials into liquid gold. One of alchemy’s goals was to find an “elixir of life.” In craft beer’s innovation, creativity, diversity; ultimately producing a panoply of flavorful beer, I don’t think it’s a stretch to suggest they have found that mythic elixir.

But the science that the big brewers bring to to the table is, at least in part, what allowed the new generation of brewers to — as Sam Calagione is fond of saying — “let their freak flag fly.” From the dawn of the industrial revolution, all of the big brewers (which, for the most part, was ALL of them) introduced innovation after innovation into the brewing process. Refrigeration became commonplace. Thanks to Pasteur, yeast was finally understood and could be controlled. Industrialization allowed for so many advancements into the process that an ancient brewer would hardly recognize one today. From the mid-1800s to the present, brewing has changed more than in the thousands of year before that time. And for that, we can thank all of the big breweries who invested heavily in improving the way their beer was made. R&D suddenly became a much bigger part of an operating brewery, and the trade literature of that time is crammed full of one latest innovation after another.

In fact, the breweries that innovated better than their competitors and adapted to the new technologies began to dominate the beer industry. While there were certainly other factors at work, it does partly explain the sharp drop in the number of breweries in America which peaked around 1873 with 4,131. After the decade of the 1870s, improved efficiencies in the brewhouse meant that breweries could serve a wider geographic territory and the more successful started swallowing up the weaker. By 1900, the number of breweries was below 1,800.

2011-ba-brewery-counts

For the next century, both before Prohibition and then after (ignoring that blip of re-openings in 1933) the number of operating breweries continued to fall until around 1980, when thanks to the new microbrewery revolution they began to rise once more. By that time it was less about efficiencies and more about the bigger trying to squelch the competition. Maybe it had always been strictly about “business,” but in the 1970s and 80s it seemed more more ugly, at least to me, as I watched one regional brewery after another close all around me.

But for their part, the remaining companies did keep the history of beer alive, with many having extensive libraries, collections of breweriana and a desire to celebrate the fact that the had survived at least up to that point. By the time I joined the beer industry in some fashion, and was no longer a civilian, there were only three really big brewers, and few more remaining regionals. Like the old nursery rhyme, Ten Little Indians, “then there were three.” The Big 3, as they were often referred to. It seemed like there would always be the Big 3. I was a surprised as anyone when Coors and Miller decided to merge their U.S. operations. “Three little Injuns out on a canoe, One tumbled overboard and then there were two.” I rarely hear anyone refer to the remaining ABI and MillerCoors as the Big 2, now they’re just the big brewers. And Pabst could easily become another third, if only they’d just buy their own brewery and become a legitimate player.

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So I think we have much to thank the big boys for, from the science and modern technology they embraced to their reluctant role as the keepers of brewing history. Not to mention that they could easily have stopped the legal change that gave a tax break to small brewers way back when. It was certainly within their political clout to kill it, but they worked with the small brewers instead. Whether it was because they didn’t consider them a threat or whether they genuinely welcomed them into their fraternity it unclear, but doesn’t really matter in the end.

One thing many beer geeks, I think, don’t realize is that there are many, many really good people working at the big breweries. We spend so much energy criticizing their products, their advertising, their marketing, their toxic and often bullying practices, that many people overlook that fact. The big breweries are alike with the small ones insofar as the entire industry is comprised of a nearly universal group of good people, certainly a cut above any other I’ve worked in or knew people who did. And the beer business is a people business, as much as it’s about anything else. So while I may not raise a toast to everything they do, and I may not use one of their beers for that toast, I will very much raise a toast to the people, and especially the brewers, that comprise the largest segment of the beer industry: the big boys. This one’s for you.

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ad-billboard
Wednesday’s ad is for Whitbread, from 1937, and the ad shows an illustration of Louis Pasteur working on his fermentation studies in a laboratory at Whitbread Brewing in 1871, nine years after he completed his first test of pasteurization, which took place today in 1862.

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robot
This is an odd one, if not without a certain interest just for the effort involved and how it works. For a design contest, The RX MCU Design Contest, sponsored by Renesas, an Australian designer, Matt Prattau (a.k.a. Zizzle), created the Brewbot, an automated homebrewing system that does all the work.

Here’s his introduction, from the contest submission:

Home brewing beer can be a rewarding mix of art and science. It allows the brewer to explore the thousands of possibilities available using the dozens of varieties of hops, malt, yeast and other interesting ingredients. The process can be time consuming and results can vary due to many factors, including precision, technique and consistency used by the brewer in the process.

Imagine an appliance in your kitchen that could take the time and labor out of the brewing process and brew a consistent batch of beer each time thus allowing the user to focus on the ingredients and recipe.

I always thought that the actual work of homebrewing was part of the fun, not something to be avoided, but still, you have to admire the way he did it. Here’s what it looks like. The submission page also includes links to schematics and other information about the design. He’s also set up a blog where he tracks his progress entitled Brewbot Mk2

automated-beer-brewery

Hack A Day blogged about the Brewbot, and had this to say:

You can see the development board there just to the left of the brew kettle. It’s network connected with a web interface that allows you to take recipes from Brewtarget and import them directly to the system. All you need to do is make sure that you load up the grain basket and boil addition modules to match your recipe. The bot takes it from there, filling the kettle, preheating that water, lowering the grains and maintaining temperature for the mash, and completing the boil with additions from the servo-controlled PVC pipe pods. Experienced brewers will notice a few steps missing, like the sparge, and a quick way to cool the finished wort. But this does take a huge part of the drudgery out of our hands. If only it had a clean-in-place system … then we’d really be happy!

But to get a real feel for it, check out the video where the designer walks you though the steps of how it works.

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Jean Van Roy Talks Cantillon

by Jay Brooks on March 27, 2011 · 2 comments

in Beers,Breweries,Events

cantillon
One of the most fun seminars at this year’s Craft Brewers Conference last week was the Barrel-Aged Sour Beers from Two Belgian’s Perspectives on Friday. It was moderated by Vinnie Cilurzo from Russian River Brewing and featured two lambic brewers, Yvan de Baets, owner of Brasserie de la Senne, and Jean Van Roy, owner of Brasserie Cantillon. I missed part of Yvan’s talk, but caught all of Jean’s. I first met Jean Van Roy at Cantillon several years ago, shortly before he took over the brewery from his father, Jean Pierre, and when Yvan was still working there, too. Jean gives a great overview of Cantillon’s brewing process. Enjoy.

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Yvan de Baets, Vinnie Cilurzo and Jean Van Roy.

Cantillon by Brookston

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copper-kettle
In June of 1933, just as Prohibition was in its death throes, that month’s issue of Popular Science magazine ran a two-page spread entitled Beer Making Is Marvel Of Industrial Chemistry, illustrated by Benjamin Goodwin Seielstad. It’s great fun to see it all laid out the way it’s done here. It seems like they were laying the groundwork for the return of brewing in America.

beer_making_1

There’s not a great deal of text accompanying the chart, but here it is in its entirety, from page two of the beer making chart:

With the removal of national restrictions against the manufacture and sale of beer, American brewers are again in action. Their operations represent one of the most extensive applications of modern industrial chemistry. More than 2,000,000,000 pounds of malt, 650,000,000 pounds of corn and corn products, and 41,000,000 pounds of hops are a part of the vast consignment of raw materials that experts will turn each year into beer. On these pages, our artist shows how the transformation is accomplished in one big, and now active, American brewery.

Beer is the fermented product of malted or sprouted grain, usually barley. Its manufacture requires the conversion of the grain’s starch into fermentable sugar, and the transformation of this sugar, by fermentation, into alcohol and carbon dioxide gas. During the process, the beer is given its characteristic bitter flavor by the addition of hops, the yellowish-green cones or catkins of the hop vine.

Malt, the principal raw material, has previously been produced by steeping, sprouting, and drying barley. Germination develops an important enzyme or digestive fluid called diastase, capable of turning the malt’s starch into sugar. Since this task does not exhaust the enzyme’s power, additional starch in the form of corn or rice is often added at the start of the brewing operation. Subsequent steps from the mash to the final product are explained in the drawings. The color of the finished beer depends upon the raw materials; natural malt yields a pale beer, while caramelized, or heat-treated, malt gives a dark beer.

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The Chemistry Of Beer

March 14, 2011

I got an interesting press release this morning from the American Chemistry Society (ACS) touting the Chemistry of Beer, as they put it, “just in time for Saint Patrick’s Day. Today they “released a new video, The Chemistry of Beer, which focuses on the science involved in producing the world’s third most popular beverage (after [...]

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The Impact Of Texture On Taste Perception

March 8, 2011

On Food Navigator, there was an interesting short interview with Matthew Patrick, VP of R&D for TIC Gums where he suggests that “food and beverage product developers spend a shockingly low amount of time examining how texture may impact a finished product.” In beer, of course, texture is more often referred to as “mouthfeel.” And [...]

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Celtic Beer: 500 B.C.

January 19, 2011

Science News last week had a fascinating tale from 2,500 years ago, about ancient Celtic breweries in present-day Germany. It was revealed in a new paper by Hans-Peter Stika, entitled Early Iron Age and Late Mediaeval malt finds from Germany—attempts at reconstruction of early Celtic brewing and the taste of Celtic beer, that early Celts [...]

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Searching For Science In A Glass Of Beer

December 4, 2010

NPR’s Science Friday had an interview this week with Charlie Bamforth, talking about beer and his new book, “Beer Is Proof God Loves Us: Reaching for the Soul of Beer and Brewing.” Bamforth, of course, is the Anheuser-Busch Endowed Professor of Brewing Science at the University of California at Davis. In the segment, entitled Searching [...]

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NOSB Unanimously Votes That Organic Beer Should Include 100% Organic Hops

October 28, 2010

I just heard that the National Organic Standards Board (NOSB) earlier today voted unanimously “to require organic beer to include 100% organic hops beginning January 1, 2013.” If you haven’t been following this, under current USDA guidelines, a beer can be labeled “organic” if 95% of its ingredients are organic. Since less than 5% of [...]

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SABMiller Proposes Floating Brewery

October 12, 2010

SABMiller put out a press release today with their prediction for the future of breweries, “given a range of different scenarios determined by the cost and availability of water and energy.” Below is the text fro the release. Working with innovation consultancy, Innovia Technology, SABMiller envisioned four plausible business environments, based on the different uncertainties [...]

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Session #44: Frankenstein’s Beers

October 1, 2010

Our 44th Session is an appropriately scary one, with Halloween at the end of the month. The Session is hosted by Ashley Routson a.k.a. The Beer Wench. She’s chosen “Frankenstein Beers” as her topic, which Ashley likens to Frankenstein’s monster, a creation that was “constructed of human parts and various other inanimate objects,” defying nature’s [...]

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Most Complete Beer Proteome Found

September 29, 2010

The American Chemical Society has announced that the most complete beer proteome has been found. The journal article in the ACS publication Journal of proteome Research, The Proteome Content of Your Beer Mug was conducted in Milan, Italy by two area university departments from the Politecnico di Milano and the Universit degli Studi di Milano [...]

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A Fermentation Question

January 6, 2010

I preordered Michal Pollan’s new book, Food Rules, so it arrived on the day it was published. At 112 sparse pages, it’s really more of a pamphlet but I’ve been enjoying reading it off and on for the last few days. When I reached Rule #33 (of 64) it stopped me in my tracks, and [...]

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Good For Your Bones: Beer

August 15, 2009

A study recently conducted in Spain revealed that women who drink beer daily, or nearly so, have stronger bone density and have a lower risk of developing osteoporosis later in life. The study, published in the June edition of Nutrition, speculates that “the high level of silicon in beer slows down the thinning that leads [...]

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